Double-layer die head structure of blow molding machine
阅读说明：本技术 吹塑机的双层模头结构 (Double-layer die head structure of blow molding machine ) 是由 徐文良 林一波 何建领 孙晓东 周渊剑 于 2020-07-15 设计创作，主要内容包括：一种吹塑机的双层模头结构,包括流道内芯及射料机构,特点：流道内芯上构成有流道内芯熔体导引通道,射料机构包括导流套压盘、内层熔体导流套、外层熔体导流套和外导套,导流套压盘与射料推盘驱动机构连接,内层熔体导流套具有内层熔体导流套腔,内层熔体导流套上设内层熔体导流套第一、第二纵向导流槽,内层熔体导流套的外壁上有内层熔体分流凹道,外层熔体导流套具有外层熔体导流套腔,外层熔体导流套上设外层熔体导流套导流孔,外层熔体导流套的外壁上有外层熔体分流凹道,外导套设在射料缸套腔的腔壁与外层熔体导流套的外壁之间。能使厚薄均匀度得以显著提高,保障熔坯质量；缩短熔体流动行程而提高熔体流动速度,缩短流动时间,提高效率。(The utility model provides a double-deck die head structure of blowing machine, includes runner inner core and penetrates material mechanism, characteristics: the runner inner core is provided with a runner inner core melt guide channel, the injection mechanism comprises a guide sleeve pressure plate, an inner melt guide sleeve, an outer melt guide sleeve and an outer guide sleeve, the guide sleeve pressure plate is connected with the injection push plate driving mechanism, the inner melt guide sleeve is provided with an inner melt guide sleeve cavity, the inner melt guide sleeve is provided with a first longitudinal guide groove and a second longitudinal guide groove of the inner melt guide sleeve, the outer wall of the inner melt guide sleeve is provided with an inner melt diversion concave channel, the outer melt guide sleeve is provided with an outer melt guide sleeve cavity, the outer melt guide sleeve is provided with an outer melt guide sleeve diversion hole, the outer wall of the outer melt guide sleeve is provided with an outer melt diversion concave channel, and the outer guide sleeve is arranged between the cavity wall of the injection cylinder sleeve cavity and the outer wall of the outer melt guide sleeve. The thickness uniformity can be obviously improved, and the quality of a molten blank is guaranteed; the flow stroke of the melt is shortened, so that the flow speed of the melt is improved, the flow time is shortened, and the efficiency is improved.)
1. A double-layer die head structure of a blow molding machine comprises a runner inner core (6) and a material injection mechanism (7) which is in sliding fit with the runner inner core (6), wherein the runner inner core (6) is fixed with a feeding disc (4) and communicated with the feeding disc (4) in a use state, the material injection mechanism (7) is arranged in a material injection cylinder sleeve cavity (51) of a material injection cylinder sleeve (5) in a vertically moving mode and is connected with a material injection push disc driving mechanism (3) in the use state, the double-layer die head structure is characterized in that a runner inner core melt guide channel (61) which is communicated with the feeding disc (4) and used for supplying inner-layer melt and outer-layer melt which are introduced by the feeding disc (4) to the material injection mechanism (7) is formed on the runner inner core (6), the material injection mechanism (7) comprises a flow guide sleeve (71), an inner-layer melt flow guide sleeve (72), an outer-layer melt flow guide sleeve (73) and an outer guide sleeve (74), the guide sleeve pressing plate (71) is connected with the injection pushing plate driving mechanism (3) in the injection cylinder sleeve cavity (51), the inner-layer melt guide sleeve (72) is provided with an inner-layer melt guide sleeve cavity (721), the inner-layer melt guide sleeve cavity (721) is sleeved outside the runner inner core (6) in a vertically moving manner, the upper end of the inner-layer melt guide sleeve (72) is fixed with the downward side of the guide sleeve pressing plate (71), an inner-layer melt guide sleeve first longitudinal guide groove I (722) and an inner-layer melt guide sleeve second longitudinal guide groove II (723) which are used for enabling the inner-layer melt guide sleeve cavity (721) to be communicated with the outside are arranged on the inner-layer melt guide sleeve (72) and face to face, the inner-layer melt guide sleeve first longitudinal guide groove I (722) and the inner-layer melt guide sleeve second longitudinal guide groove II (723) are communicated with the runner inner core guide channel (61), an inner melt diversion concave channel (724) communicated with the inner melt diversion sleeve first longitudinal diversion groove I (722) is formed on the outer wall of the inner melt diversion sleeve (72), the outer melt diversion sleeve (73) is provided with an outer melt diversion sleeve cavity (731), the outer melt diversion sleeve (73) is sleeved outside the inner melt diversion sleeve (72) through the outer melt diversion sleeve cavity (731), the upper end of the outer melt diversion sleeve (73) is fixed with the downward side of the diversion sleeve pressure plate (71), an outer melt diversion sleeve diversion hole (732) communicated with the inner melt diversion sleeve second longitudinal diversion groove II (723) is formed on the outer melt diversion sleeve (73) and at the position corresponding to the inner melt diversion sleeve second longitudinal diversion groove II (723), an outer melt diversion concave channel (733) communicated with the outer melt diversion hole (732) is formed on the outer wall of the outer melt diversion sleeve (73), the outer guide sleeve (74) is arranged between the cavity wall of the material injection cylinder sleeve cavity (51) and the outer wall of the outer-layer melt guide sleeve (73) in a vertically moving mode, and the upper end of the outer guide sleeve (74) is fixed with one downward side of the guide sleeve pressing plate (71); the space between the lower part of the outer wall of the inner-layer melt guide sleeve (72) and the lower part of the inner wall of the outer-layer melt guide sleeve (73) is a guide sleeve inner-layer melt leading-out channel (725), and the space between the lower part of the outer wall of the outer-layer melt guide sleeve (73) and the lower part of the inner wall of the outer guide sleeve (74) is a guide sleeve outer-layer melt leading-out channel (734).
2. The double-layered die structure of the blow molding machine according to claim 1, wherein said runner core guide passage (61) comprises an inner layer melt longitudinal introduction hole (611) and an outer layer melt longitudinal introduction hole (612), the inner layer melt longitudinal introduction hole (611) and the outer layer melt longitudinal introduction hole (612) are opened at the upper end of the height direction of said runner core (6) and are in a face-to-face positional relationship with each other at 180 ° intervals around the circumferential direction of the runner core (6), a runner core fixing flange (613) is formed at the top of the runner core (6), the runner core fixing flange (613) is fixed to the central position of said feed plate (4), and a runner core fixing flange core rod relief hole (6131) is formed at the central position of the runner core fixing flange (613), the runner core rod relief hole (6131) is formed with the runner core rod relief hole (6131) at the central position of the runner core (6) The core rod cavities (614) are corresponding and communicated, an inner layer melt leading-in sleeve (615) is arranged on the runner core (6) and at a position corresponding to the upper end of the inner layer melt longitudinal leading-in hole (611), the upper end of the inner layer melt leading-in sleeve (615) is fixed with the runner core fixing flange plate (613), the lower end is inserted into the upper end of the inner layer melt longitudinal leading-in hole (611), a runner core inner layer melt leading-in hole (6151) is arranged at the side part, the runner core inner layer melt leading-in hole (6151) is communicated with the feeding disc (4) through a runner core inner layer melt leading-in hole (616a) arranged on the runner core (6) and is also communicated with the inner layer melt longitudinal leading-in hole (611), a runner core inner layer melt leading-out hole (616b) is arranged at a position corresponding to the lower end of the inner layer melt longitudinal leading-in hole (611), an outer-layer melt introduction sleeve (617) is arranged on the runner core (6) at a position corresponding to the upper end of the outer-layer melt longitudinal introduction hole (612), the upper end of the outer-layer melt introduction sleeve (617) is fixed with the runner core fixing flange (613), the lower end of the outer-layer melt introduction sleeve is inserted into the upper end of the outer-layer melt longitudinal introduction hole (612) and is provided with a runner core outer-layer melt introduction hole (6171) at the side, the runner core outer-layer melt introduction hole (6171) is communicated with the feed plate (4) through a runner core outer-layer melt introduction hole (616c) formed on the runner core (6) and is also communicated with the outer-layer melt longitudinal introduction hole (612), a runner core outer-layer melt extraction hole (616d) is formed at a position corresponding to the lower end of the outer-layer melt longitudinal introduction hole (612), and the inner-layer melt guide sleeve first longitudinal guide groove I (722) formed on the inner-layer melt guide sleeve (72) and the runner core inner-layer melt The body leading-out hole (616b) is communicated, and the inner layer melt guide sleeve second longitudinal guide groove II (723) arranged on the inner layer melt guide sleeve (72) is communicated with the runner inner core outer layer melt leading-out hole (616 d).
3. The double-layer die head structure of the blow molding machine according to claim 1, characterized in that the inner-layer melt diversion groove (724) comprises an inner-layer melt first diversion transverse groove I (7241), an inner-layer melt second diversion transverse groove II (7242), an inner-layer melt first herringbone diversion groove I (7243) and an inner-layer melt second herringbone diversion groove II (7244), the positions of the inner-layer melt first diversion transverse groove I (7241) and the inner-layer melt second diversion transverse groove II (7242) on the outer wall of the inner-layer melt guide sleeve (72) respectively correspond to the two sides of the upper portion of the inner-layer melt guide sleeve first longitudinal guide groove I (722) and the opposite ends of the inner-layer melt first diversion transverse groove I (7241) and the inner-layer melt second diversion transverse groove II (7242) communicate with the upper portion of the inner-layer melt guide sleeve first longitudinal guide groove I (722), one end of the inner-layer melt first diversion transverse concave channel I (7241) and one end of the inner-layer melt second diversion transverse concave channel II (7242), which are far away from the inner-layer melt diversion sleeve first longitudinal diversion trench I (722), are connected and communicated with the inner-layer melt first herringbone diversion concave channel I (7243) and the inner-layer melt second herringbone diversion concave channel II (7244) at the same time at the positions corresponding to the positions between the inner-layer melt first herringbone diversion concave channel I (7243) and the inner-layer melt second herringbone diversion concave channel II (7244), and the inner-layer melt first herringbone diversion concave channel I (7243) and the inner-layer melt second herringbone diversion concave channel II (7244) are formed on the outer wall of the inner-layer melt diversion sleeve (72) in a face-to-face state at an angle of 180 degrees around the circumferential direction of the inner-layer melt diversion sleeve (72) and are communicated with each other; the inner-layer melt first herringbone shunting concave channel I (7243) and the inner-layer melt second herringbone shunting concave channel II (7244) are inverted herringbone shunting concave channels.
4. The dual layer die structure of a blow molding machine as claimed in claim 1 wherein said outer melt diversion channel (733) comprises an outer melt first diversion transverse channel i (7331), an outer melt second diversion transverse channel ii (7332), an outer melt first inverted chevron diversion channel i (7333) and an outer melt second inverted chevron diversion channel ii (7334), the outer melt first diversion transverse channel i (7331) and the outer melt second diversion transverse channel ii (7332) are positioned on the outer wall of said outer melt guiding sleeve (73) at locations corresponding to the sides of said outer melt guiding sleeve guiding hole (732) respectively and the outer melt first diversion transverse channel i (7331) and the outer melt second diversion transverse channel ii (7332) are in communication with the outer melt guiding sleeve guiding hole (732) at opposite ends of the outer melt first diversion transverse channel i (7331) and the outer melt second diversion transverse channel ii (7332), and the outer melt first diversion transverse channel i (7331) and the outer melt second diversion transverse channel ii (7332) are remote from the outer melt guiding sleeve guiding hole (732), and the outer melt first diversion transverse channel i (7331) and one end of the flow hole (732) is hinged and communicated with the outer-layer melt first inverted herringbone diversion concave channel I (7333) and the outer-layer melt second inverted herringbone diversion concave channel II (7334) at the position corresponding to the position between the outer-layer melt first inverted herringbone diversion concave channel I (7333) and the outer-layer melt second inverted herringbone diversion concave channel II (7334), and the outer-layer melt first inverted herringbone diversion concave channel I (7333) and the outer-layer melt second inverted herringbone diversion concave channel II (7334) are formed on the outer wall of the outer-layer melt diversion sleeve (73) in a face-to-face state at an angle of 180 degrees around the circumferential direction of the outer-layer melt diversion sleeve (73) and are communicated with each other.
5. The double-layered die structure of the blow molding machine according to claim 1, wherein a feed plate cavity (41) is formed at a side of the feed plate (4) facing upward and at a position corresponding to the runner core fixing flange (613), and the runner core fixing flange (613) is fixed to the feed plate (4) at a position corresponding to the feed plate cavity (41) by a runner core fixing flange screw (6132); a feed plate inner layer melt feed opening (42) is formed at one side of the feed plate (4) and at a position corresponding to the runner core inner layer melt introduction hole (616a), the feed plate inner layer melt feed opening (42) communicating with the runner core inner layer melt introduction hole (616 a); a feed plate outer layer melt feed opening (43) is formed on the other side of the feed plate (4) and at a position corresponding to the runner core outer layer melt introduction hole (616c), and the feed plate outer layer melt feed opening (43) is communicated with the runner core outer layer melt introduction hole (616 c); outer guide sleeve fixed connection screws (711), outer melt guide sleeve fixed connection screws (712) and inner melt guide sleeve fixed connection screws (713) are arranged on the guide sleeve pressing plate (71) and around the guide sleeve pressing plate (71) at intervals, the outer melt guide sleeve fixed connection screws (712) are positioned between the outer guide sleeve fixed connection screws (711) and the inner melt guide sleeve fixed connection screws (713), an outer melt guide sleeve probing step groove (714) is formed on one downward side of the guide sleeve pressing plate (71) around the circumferential direction of the guide sleeve pressing plate (71) and at a position corresponding to the outer melt guide sleeve fixed connection screws (712), an inner melt guide sleeve probing step groove (715) is formed on the upper surface of the outer guide sleeve (74) and around the outer guide sleeve (74) at intervals A fixed screw hole (741), the outer guide sleeve fixing and connecting screw (711) is screwed into the outer guide sleeve fixing screw hole (741), the upper edge of the outer layer melt guide sleeve (73) extends into the inner edge of the outer layer melt guide sleeve and extends into the stepped groove (714), outer layer melt guide sleeve fixing screw holes (735) are arranged on the periphery of the surface of the upper edge of the outer layer melt guide sleeve (73) at intervals, the outer layer melt guide sleeve fixing and connecting screw (712) is screwed into the outer layer melt guide sleeve fixing screw hole (735), the upper edge of the inner melt flow guide sleeve (72) extends into the inner melt flow guide sleeve along the extending step groove (715) and inner melt flow guide sleeve fixing screw holes (726) are arranged around the upper surface of the inner melt flow guide sleeve (72) at intervals, the inner layer melt guide sleeve fixing and connecting screw (713) is screwed into the inner layer melt guide sleeve fixing screw hole (726).
6. The double-layer die head structure of the blow molding machine according to claim 2, characterized in that the injection push rod driving mechanism (3) comprises an injection push rod driving cylinder (31), an injection push rod driving disc (32), a transition connection disc (33) and a group of push rods (34), the injection push rod driving cylinder (31) comprises an injection push rod driving cylinder body (311), an injection push rod driving cylinder cover (312) and an injection push rod driving cylinder piston (313), the injection push rod driving cylinder body (311) is fixed with the die head support plate (10) and supported on the upward side of the feed disc (4), the injection push rod driving cylinder cover (312) is fixed on the top of the injection push rod driving cylinder body (311), an injection push rod driving cylinder feed-return hole (3121) is formed on the side of the injection push rod driving cylinder cover (312), and the injection push rod driving cylinder piston (313) is arranged on the injection push rod driving cylinder body (311) of the injection push rod driving cylinder body (311) A piston outer ring (3132) is fixed at a position corresponding to the upper part of the material injection push rod driving oil cylinder piston sealing ring (3131), the piston outer ring (3132) limits the material injection push rod driving oil cylinder piston sealing ring (3131), the material injection push rod driving oil cylinder oil inlet and return hole (3121) is communicated with the material injection push rod driving oil cylinder body cavity (3111) positioned above the material injection push rod driving oil cylinder piston (313), the upper part of the material injection push disk (32) is fixed at the bottom of the material injection push rod driving oil cylinder piston (313) through material injection push disk upper flange screws (321) and material injection push rod driving oil cylinder screws (313) which are distributed at intervals, and the lower part of the material injection push disk (32) is fixed at the bottom of the material push disk lower flange screws (322) and transition screws (322) which are distributed at intervals The connecting disc (33) is fixed, the upper ends of a group of push rods (34) are fixedly connected with the transition connecting disc (33), and the lower ends of the push rods are fixedly connected with the flow guide sleeve pressing disc (71); when in use, the die head supporting plate (10) is fixed with a frame of the blow molding machine in a state of being emptied on a floor through a die head supporting plate screw (101); a core rod up-and-down displacement driving mechanism (2) for enabling a core rod (1) to move up and down is arranged on one upward side of the injection push rod driving oil cylinder cover (312), the upper end of the core rod (1) is connected with the core rod up-and-down displacement driving mechanism (2) and extends above the core rod up-and-down displacement driving mechanism (2), and the lower end of the core rod (1) sequentially penetrates through the injection push rod driving oil cylinder cover (312), the injection push rod driving oil cylinder piston (313), the injection push disc (32) and the flow channel inner core rod cavity (614) and extends out of a flow channel inner core rod cavity expansion cavity (6141) which is formed at the lower part of the flow channel inner core rod cavity (614) and has an inner diameter larger than that of the flow channel inner core rod cavity (614); a die sleeve mechanism (8) is arranged between the lower end of the runner inner core (6) and the lower end cavity wall of the injection cylinder sleeve cavity (51) of the injection cylinder sleeve (5), and a die mechanism (9) is arranged at the lower end of the core rod (1).
7. The double-layered die head structure of a blow molding machine according to claim 6, wherein a cooling water introduction hole (323) and a cooling water extraction hole (324) are formed at one side of the lower portion of the shot push disk (32), a cooling water ring flow passage (3133) is formed at the lower portion of the shot push rod driving cylinder piston (313), the cooling water introduction hole (323) communicates with the cooling water ring flow passage (3133) through a cooling water longitudinal introduction hole (325) also formed at the shot push disk (32), and the cooling water extraction hole (324) communicates with the cooling water ring flow passage (3133) through a cooling water longitudinal extraction hole (326) formed at the shot push disk (32), and the cooling water ring flow passage (3133) cools the shot push rod driving cylinder piston (313); an inner cylinder barrel (11) is sleeved on the core rod (1) and at a position corresponding to the position between the material injection push rod driving oil cylinder cover (312) and the material injection push rod driving oil cylinder piston (313), the upper end of the inner cylinder barrel (11) extends into the material injection push rod driving oil cylinder cover (312) and is formed with an inner cylinder barrel flange (111), the inner cylinder barrel flange (111) is fixed with the material injection push rod driving oil cylinder cover (312) through an inner cylinder barrel flange screw (1111) at a position corresponding to a cylinder cover step cavity (3122) at the central position of the material injection push rod driving oil cylinder cover (312), an inner cylinder barrel upper sealing ring (112) used for forming sealing with the material injection push rod driving oil cylinder cover (312) is arranged at the upper end of the inner cylinder barrel (11), the lower end of the inner cylinder barrel (11) is inserted into a piston central hole (3134) of the material injection push rod driving oil cylinder piston (313), and an inner cylinder lower seal ring (113) for sealing with the hole wall of the piston center hole (3134) is fitted over the lower end of the inner cylinder (11), a piston inner press ring (3135) is fixed by a piston inner press ring screw (31351) at a position corresponding to the upper side of the inner cylinder lower seal ring (113), and the inner cylinder lower seal ring (113) is defined by the piston inner press ring (3135).
8. The double-layered die head structure of the blow molding machine according to claim 7, wherein the mandrel up-down displacement driving mechanism (2) comprises a mandrel up-down displacement cylinder (21), a mandrel locking nut (22) and a middle plate (23), the mandrel up-down displacement cylinder (21) comprises a mandrel up-down displacement cylinder body (211), a mandrel up-down displacement cylinder upper cylinder cover (212), a mandrel up-down displacement cylinder lower cylinder cover (213) and a mandrel up-down displacement piston (214), the mandrel up-down displacement cylinder body (211) is fixed between the mandrel up-down displacement cylinder upper cylinder cover (212) and the mandrel up-down displacement cylinder lower cylinder cover (213) by a cylinder cover coupling bolt (2113), an upper cylinder cover oil inlet and outlet hole (2121) is opened at one side of the mandrel up-down displacement cylinder upper cylinder cover (212), and the mandrel up-down displacement cylinder lower cylinder cover (213) is supported at an upward side of the shot material push rod driving cylinder cover (312) and fixed by a lower cylinder cover fixing bolt (213) A lower cylinder cover oil inlet and outlet hole (2131) is arranged on one side of a lower cylinder cover (213) of the mandrel up-and-down displacement cylinder, the middle part of a mandrel up-and-down displacement piston (214) is positioned in a cylinder body (211) of the mandrel up-and-down displacement cylinder, an upper piston column (2141) extends from the central position of the upper part of the mandrel up-and-down displacement piston (214), the upper piston column (2141) is in sliding fit with the central hole of the upper cylinder cover (212) of the mandrel up-and-down displacement cylinder, an upper piston column sealing ring (21411) is arranged on the upper piston column (2141), the upper piston column (2141) is sealed with the central hole of the upper cylinder cover (212) of the mandrel up-and-down displacement piston (214) by the upper piston column sealing ring (21411), a lower piston column (2142) extends from the central position of the lower part of the mandrel up-and-down displacement piston (214), and the lower piston column (2142) is in sliding fit with the central hole of, a piston lower column sealing ring (21421) is arranged on the piston lower column (2142), the piston lower column (2142) and the central hole of the lower cylinder cover (213) of the mandrel rod vertical displacement cylinder form a seal by the piston lower column sealing ring (21421), the cylinder cover step cavity (3122) forms a piston lower column yielding space at the same time, a piston sealing ring (2143) is embedded on the outer wall of the middle part of the upper and lower displacement piston (214) of the mandrel rod, the upper and lower displacement piston (214) and the cylinder cavity wall of the cylinder body (211) of the upper and lower displacement cylinder are in sealing fit by the piston sealing ring (2143), a space between the upward side of the upper and lower displacement piston (214) of the mandrel rod and the upper cylinder cover (212) of the upper and lower displacement cylinder cover (213) of the upper and lower displacement cylinder is an upper cylinder cavity (2111), and a space between the downward side of the upper and lower cylinder cover (213) of the upper and lower displacement piston (214) of, the upper cylinder cover oil inlet and outlet hole (2121) is communicated with the upper cylinder cover (2111), the lower cylinder cover oil inlet and outlet hole (2131) is communicated with the lower cylinder cavity (2112), the upper end of the core rod (1) extends to the upper part of the upper cylinder cover (212) of the core rod vertical displacement cylinder, a core rod locking nut (22) is rotatably arranged above the core rod (1), a group of connecting screws (221) are arranged on the core rod locking nut (22) at intervals, a middle plate (23) is sleeved at the upper end of the core rod (1) in a position corresponding to the lower part of the core rod locking nut (22) and corresponds to the upper part of the upper piston column (2141), a middle plate anti-rotating pin (231) is further arranged on the middle plate (23), and the lower part of the middle plate anti-rotating pin (231) is fixed with a through hole formed in the upper cylinder cover (212) of the upper cylinder and the lower cylinder displacement cylinder.
9. The double-layer die head structure of the blow molding machine according to claim 6, characterized in that the die sleeve mechanism (8) comprises a core die sleeve (81), a diversion taper sleeve (82), an outer port die (83) and an outer port die support ring (84), a core die sleeve core rod abdicating hole (8111) for the lower end of the core rod (1) to pass through is opened at the central position of the core die sleeve top wall (811) of the core die sleeve (81), and the core die sleeve top wall (811) is fixed with the bottom of the runner inner core (6) through a core die sleeve top wall fixing screw (8112), the diversion taper sleeve (82) is arranged at the lower part of the shooting material cylinder sleeve cavity (51) of the shooting material cylinder sleeve (5) and supported on the outer port die (83), the outer wall of the diversion taper sleeve (82) is attached to the inner wall of the lower part of the shooting material cylinder sleeve cavity (51), and the space between the inner wall of the diversion taper sleeve (82) and the outer wall of the core die sleeve (81) constitutes a core die sleeve melt converging runner (85), an outer mouth die supporting ring matching flange ring (831) is formed at the upper part of the outer mouth die (83), the lower part of the outer mouth die (83) extends to the lower part of the outer mouth die supporting ring (84), a space between the inner wall of the outer mouth die (83) and the mouth die mechanism (9) is formed into a double-layer melt leading-out runner (832), and the outer mouth die supporting ring (84) is fixed with the bottom of the shooting cylinder sleeve (5) through an outer mouth die supporting ring screw (841) at a position corresponding to the lower part of the outer mouth die supporting ring matching flange ring (831); outer port die adjusting screws (52) used for adjusting an outer port die (83) are arranged on the shooting cylinder sleeve (5) at intervals at positions corresponding to the outer port die support ring matching flange rings (831), and shooting cylinder sleeve heaters (53) are arranged on the outer wall of the shooting cylinder sleeve (5) at intervals along the height direction of the shooting cylinder sleeve (5); an outer die heater (833) is arranged on the outer wall of the outer die (83).
10. The double-layered die structure of a blow molding machine according to claim 9, wherein said die mechanism (9) comprises a core die plate (91), an inner die (92) and a core rod limiting nut (93), a core die plate fixing sleeve (911) is formed at a central position of the core die plate (91), the core die plate fixing sleeve (911) is fixed to the lower end of said core rod (1), and the outer wall of the core die plate (91) is in close contact with the lower inner wall of said core die sleeve (81), the inner die (92) is located below the core die plate (91), an inner die hole (921) is formed at a central position of the top of the inner die (92), the inner die hole (921) is fitted over the core rod (1), and the top of the inner die (92) is fixed to the core die plate (91) by the inner die fixing screw (922), the limiting nut (93) is fixed to the lower end of the core rod (1) extending to the inner die cavity (923) in the inner die cavity (92) corresponding to the inner die (92) The double-layer melt extraction runner (832) is fixed at the end, and is formed between the inner wall of the outer opening die (83) and the outer wall of the inner opening die (92), the space between the lower edge of the outer wall of the inner opening die (92) and the lower edge of the inner wall of the outer opening die (83) is formed into an opened or closed double-layer melt discharge opening and closing opening (924), and the double-layer melt discharge opening and closing opening (924) is communicated with the double-layer melt extraction runner (832).
Technical Field
The invention belongs to the technical field of blow molding machinery, and particularly relates to a double-layer die head structure of a blow molding machine.
Background
The blow molding machine is an apparatus for processing hollow plastic containers such as containers for filling pharmaceutical and chemical materials, oils, various additives, various solvents, additives, hazardous chemical packaging barrels, water tanks, oil tanks, particularly oil tanks and trays of vehicles, and the like. Since the blow molding mechanism of the blow molding machine belongs to the known technology, for example, it can be referred to the non-limiting examples of chinese patents CN201941151U (full-automatic blow molding machine for plastic containers) and CN202162995U (full-automatic blow molding machine for large plastic containers), etc., and thus the applicant does not need to describe any further details.
The foregoing die structure is an important component of the blow molding machine, and may even be referred to as a core, and is not disclosed in published chinese patent documents, such as CN102826765B (storage cylinder die dedicated to IBC liner blow molding machine) and CN104191594A (a dual layer extrusion blow molding machine die), among others.
From the above-mentioned term of the double-layer die, it is known that: for blowing hollow plastic articles of two different colors and/or two different materials, for example, the inner layer is non-recycled white plastic (also called "natural color plastic"), and the outer layer can be recycled plastic of various colors, according to actual needs. A more typical example of a double-layer die is the "double flow diversion storage die device for blow molding machine" proposed by the applicant under the grant publication No. CN106003665B, which remedies two disadvantages of CN104191594A and incorporates the advantages of the three aspects summarized in the technical effect column of the specification thereof. However, since this patent is directed to sufficiently mixing two different plastic materials, it is specifically referred to paragraph 0056 of the specification of this patent, and thus there is no reference in the structure to a double-layer preform that is designed to have an inner layer of white, i.e., natural color, and an outer layer of a color that is determined as needed.
The three-layer diversion storage type die head device of the blow molding machine recommended by CN110843190A eliminates the defect of CN202062631U and objectively embodies the technical effects of the four aspects recorded in the technical effect column of the specification, but still has the following defects: because the patent application sets the flow guide groove for the falling of the melt, namely the melt flow guide groove, on the wall body of each material layer sleeve, such as the outer layer sleeve, the middle layer sleeve and the inner layer sleeve (called as a material pushing cylinder sleeve) of the structural system of the molten blank injection mechanism into a spiral shape, the flow path of the melt is only prolonged, and the melt cannot be relatively uniformly distributed, so that the melt is difficult to obtain the expected thickness homogenization effect in the process of reaching the molten blank outlet between the die core mechanism and the die mechanism, when the thickness of each layer of melt is not enough to reach the expected uniformity degree, certain influence can be generated on the quality of the molten blank, and finally the quality of the blow-molded hollow plastic product is influenced, for example, when the molded hollow plastic container with a three-layer structure, such as red, yellow, blue or green, is formed on the outer layer, the middle layer is white or natural color, and the inner layer is black, color difference can occur, and defective products and even scrapped products can be generated in serious cases; in order to prolong the flow path of the melt in the spiral groove, the height dimension of the pushing cylinder sleeve needs to be ensured, but the structure has the factor of considering the factor of improving the thickness uniformity of the melt to a certain extent, and the factor of losing the factor of remarkably increasing the volume of each pushing cylinder sleeve, and finally the whole volume of the die head structure is correspondingly increased.
Disclosure of Invention
The invention aims to provide a double-layer die head structure of a blow molding machine, which is beneficial to remarkably improving the thickness uniformity of melts flowing down from the outer walls of an inner melt guide sleeve and an outer melt guide sleeve so as to ensure the quality of a molten blank, is beneficial to ensuring the thickness uniformity of the melts in a shorter melt flow distance so as to improve the melt flow speed and is beneficial to ensuring the product blowing efficiency of the blow molding machine
The invention is to accomplish the task in such a way that a double-layer die head structure of a blow molding machine comprises a runner inner core and a material injection mechanism which is in sliding fit with the runner inner core, the runner inner core is fixed with a feeding disc and communicated with the feeding disc under the using state, the material injection mechanism is arranged in a material injection cylinder sleeve cavity of a material injection cylinder sleeve in a vertically moving way and is connected with a material injection push disc driving mechanism under the using state, the double-layer die head structure is characterized in that a runner inner core melt guide channel which is communicated with the feeding disc and used for supplying inner layer melt and outer layer melt which are introduced by the feeding disc to the material injection mechanism is formed on the runner inner core, the material injection mechanism comprises a guide sleeve pressure plate, an inner layer melt guide sleeve, an outer layer melt guide sleeve and an outer guide sleeve, the guide sleeve pressure plate is connected with the material injection push disc driving mechanism in the material injection cylinder sleeve cavity, the inner layer melt guide sleeve is provided with an inner layer, the inner melt flow guide sleeve cavity is sleeved outside the flow channel inner core in a vertically moving mode, the upper end of the inner melt flow guide sleeve is fixed with one side, facing downwards, of the flow guide sleeve pressing plate, an inner melt flow guide sleeve first longitudinal flow guide groove I and an inner melt flow guide sleeve second longitudinal flow guide groove II which are used for enabling the inner melt flow guide sleeve cavity to be communicated with the outside are formed in the inner melt flow guide sleeve and face to face, the inner melt flow guide sleeve first longitudinal flow guide groove I and the inner melt flow guide sleeve second longitudinal flow guide groove II are communicated with the flow channel inner core melt guide channel, an inner melt flow distribution concave channel communicated with the inner melt flow guide sleeve first longitudinal flow guide groove I is formed in the outer wall of the inner melt flow guide sleeve, the outer melt flow guide sleeve is provided with an outer melt flow guide sleeve cavity, and the outer melt flow guide sleeve is sleeved outside the inner melt flow guide sleeve through the outer melt flow guide sleeve cavity, the upper end of the outer-layer melt flow guide sleeve is fixed with the downward side of the flow guide sleeve pressure plate, an outer-layer melt flow guide sleeve flow guide hole communicated with the inner-layer melt flow guide sleeve second longitudinal flow guide groove II is formed in the outer-layer melt flow guide sleeve and in the position corresponding to the inner-layer melt flow guide sleeve second longitudinal flow guide groove II, an outer-layer melt flow distribution concave channel communicated with the outer-layer melt flow guide hole is formed in the outer wall of the outer-layer melt flow guide sleeve, the outer guide sleeve is vertically and movably arranged between the cavity wall of the shooting cylinder sleeve cavity and the outer wall of the outer-layer melt flow guide sleeve, and the upper end of the outer guide sleeve is fixed with the downward side of the flow guide sleeve pressure plate; the space between the lower part of the outer wall of the inner melt flow guide sleeve and the lower part of the inner wall of the outer melt flow guide sleeve is a flow guide sleeve inner melt leading-out channel, and the space between the lower part of the outer wall of the outer melt flow guide sleeve and the lower part of the inner wall of the outer guide sleeve is a flow guide sleeve outer melt leading-out channel.
In a specific embodiment of the present invention, the runner core guide passage includes an inner-layer melt longitudinal introduction hole and an outer-layer melt longitudinal introduction hole which are opened at the upper end in the height direction of the runner core and are in a face-to-face positional relationship with each other at 180 ° intervals around the circumferential direction of the runner core, a runner core fixing flange is formed at the top of the runner core, the runner core fixing flange is fixed to the center of the feed plate, and a runner core fixing flange core rod relief hole corresponding to and communicating with the runner core rod cavity at the center of the runner core is formed at the center of the runner core fixing flange, an inner-layer melt introduction sleeve is provided on the runner core and at a position corresponding to the upper end of the inner-layer melt longitudinal introduction hole, the upper end of the inner-layer melt leading-in insert sleeve is fixed with the runner inner core fixing flange plate, the lower end of the inner-layer melt leading-in insert sleeve is inserted into the upper end of the inner-layer melt longitudinal leading-in hole, a runner inner core inner-layer melt leading-in hole is arranged on the side part, the runner inner core inner-layer melt leading-in hole is communicated with the feeding plate through the runner inner core inner-layer melt leading-in hole arranged on the runner inner core and is also communicated with the inner-layer melt longitudinal leading-in hole, a runner inner core inner-layer melt leading-out hole is arranged at the position corresponding to the lower end of the inner-layer melt longitudinal leading-in hole, an outer-layer melt leading-in insert sleeve is arranged on the runner inner core and is arranged at the position corresponding to the upper end of the outer-layer melt longitudinal leading-in hole, the upper end of the outer-layer melt leading-in, the outer-layer melt leading-in hole of the runner inner core is communicated with the feeding disc through an outer-layer melt leading-in hole of the runner inner core arranged on the runner inner core and is also communicated with a longitudinal outer-layer melt leading-in hole, a runner inner core outer-layer melt leading-out hole is arranged at a position corresponding to the lower end of the longitudinal outer-layer melt leading-in hole, a first longitudinal flow guide groove I of the inner-layer melt guide sleeve arranged on the inner-layer melt guide sleeve is communicated with the inner-layer melt leading-out hole of the runner inner core, and a second longitudinal flow guide groove II of the inner-layer melt guide sleeve arranged on the inner-layer melt guide sleeve is communicated with the outer-layer melt.
In another specific embodiment of the invention, the inner melt diversion concave channel comprises an inner melt first diversion transverse concave channel I, an inner melt second diversion transverse concave channel II, an inner melt first herringbone diversion concave channel I and an inner melt second herringbone diversion concave channel II, the positions of the inner melt first diversion transverse concave channel I and the inner melt second diversion transverse concave channel II on the outer wall of the inner melt diversion sleeve respectively correspond to the two sides of the upper part of the inner melt diversion sleeve first longitudinal diversion groove I, the opposite ends of the inner melt first diversion transverse concave channel I and the inner melt second diversion transverse concave channel II are communicated with the upper part of the inner melt diversion sleeve first longitudinal diversion groove I, and the ends of the inner melt first diversion transverse concave channel I and the inner melt second diversion transverse concave channel II far away from the inner melt diversion sleeve first longitudinal diversion groove I correspond to the inner melt first herringbone diversion concave channel I and the inner melt second herringbone diversion concave channel I The positions of the first herringbone diversion concave channels I and the second herringbone diversion concave channels II of the inner-layer melt are connected and communicated with the first herringbone diversion concave channels I and the second herringbone diversion concave channels II of the inner-layer melt at the same time, the first herringbone diversion concave channels I and the second herringbone diversion concave channels II of the inner-layer melt are formed on the outer wall of the inner-layer melt diversion sleeve in a face-to-face state at an interval of 180 degrees around the circumferential direction of the inner-layer melt diversion sleeve, and the first herringbone diversion concave channels I and the second herringbone diversion concave channels II of the; the inner layer melt first herringbone shunting concave channel I and the inner layer melt second herringbone shunting concave channel II are inverted herringbone shunting concave channels.
In another specific embodiment of the present invention, the outer-layer melt diversion concave channel comprises an outer-layer melt first diversion transverse concave channel i, an outer-layer melt second diversion transverse concave channel ii, an outer-layer melt first inverted herringbone diversion concave channel i and an outer-layer melt second inverted herringbone diversion concave channel ii, the positions of the outer-layer melt first diversion transverse concave channel i and the outer-layer melt second diversion transverse concave channel ii on the outer wall of the outer-layer melt diversion sleeve respectively correspond to the two sides of the diversion hole of the outer-layer melt diversion sleeve, the opposite ends of the outer-layer melt first diversion transverse concave channel i and the outer-layer melt second diversion transverse concave channel ii are communicated with the diversion hole of the outer-layer melt diversion sleeve, and the ends of the outer-layer melt first diversion transverse concave channel i and the outer-layer melt second diversion concave channel ii away from the diversion hole of the outer-layer melt diversion sleeve simultaneously correspond to the positions between the outer-layer melt first inverted herringbone diversion concave channel i and the outer-layer melt second inverted herringbone diversion concave channel ii The first inverted herringbone diversion concave channel I of the outer-layer melt and the second inverted herringbone diversion concave channel II of the outer-layer melt are mutually separated by 180 degrees around the circumferential direction of the outer-layer melt guide sleeve and are formed on the outer wall of the outer-layer melt guide sleeve in a face-to-face state, and the first inverted herringbone diversion concave channel I of the outer-layer melt and the second inverted herringbone diversion concave channel II of the outer-layer melt are mutually communicated.
In a further specific embodiment of the invention, a feeding disc cavity is formed on one upward side of the feeding disc and at a position corresponding to the runner core fixing flange plate, and the runner core fixing flange plate is fixed with the feeding disc through a runner core fixing flange plate screw at a position corresponding to the feeding disc cavity; a feeding disc inner layer melt feeding hole is formed at one side of the feeding disc and at a position corresponding to the flow channel inner core inner layer melt introducing hole, and the feeding disc inner layer melt feeding hole is communicated with the flow channel inner core inner layer melt introducing hole; a feeding disc outer layer melt feeding hole is formed in the other side of the feeding disc and at a position corresponding to the flow channel inner core outer layer melt introducing hole, and the feeding disc outer layer melt feeding hole is communicated with the flow channel inner core outer layer melt introducing hole; outer guide sleeve fixed connection screws, outer melt guide sleeve fixed connection screws and inner melt guide sleeve fixed connection screws are arranged on the guide sleeve pressure plate and around the guide sleeve pressure plate at intervals, the outer melt guide sleeve fixed connection screws are positioned between the outer guide sleeve fixed connection screws and the inner melt guide sleeve fixed connection screws, an outer melt guide sleeve probing stepped groove is formed on one downward side of the guide sleeve pressure plate around the circumferential direction of the guide sleeve pressure plate and at a position corresponding to the outer melt guide sleeve fixed connection screws, an inner melt guide sleeve probing stepped groove is formed on the upper edge of the inner melt guide sleeve at a position corresponding to the inner melt guide sleeve fixed connection screws, outer guide sleeve fixed connection screw holes are arranged on the upper surface of the outer guide sleeve and around the outer guide sleeve at intervals, and the outer guide sleeve fixed connection screws are screwed into the outer guide sleeve fixed screw holes, the upper edge of the outer melt guide sleeve extends into the outer melt guide sleeve, the upper edge of the outer melt guide sleeve extends into the step groove, outer melt guide sleeve fixing screw holes are formed in the periphery of the surface of the upper edge of the outer melt guide sleeve at intervals, outer melt guide sleeve fixing connecting screws are screwed into the outer melt guide sleeve fixing screw holes, the upper edge of the inner melt guide sleeve extends into the inner melt guide sleeve, the upper edge of the inner melt guide sleeve extends into the step groove, inner melt guide sleeve fixing screw holes are formed in the periphery of the upper surface of the inner melt guide sleeve at intervals, and inner melt guide sleeve fixing connecting screws are screwed into the inner melt guide sleeve fixing screw holes.
In yet another specific embodiment of the present invention, the injection push rod driving mechanism comprises an injection push rod driving cylinder, an injection push disk, a transition connection disk and a set of push rods, the injection push rod driving cylinder comprises an injection push rod driving cylinder body, an injection push rod driving cylinder cover and an injection push rod driving cylinder piston, the injection push rod driving cylinder body is fixed with the die head support plate and supported on the upward side of the feed disk, the injection push rod driving cylinder cover is fixed on the top of the injection push rod driving cylinder body, the side of the injection push rod driving cylinder cover is provided with an injection push rod driving cylinder oil inlet/return hole, the injection push rod driving cylinder piston is arranged in the injection push rod driving cylinder body cavity of the injection push rod driving cylinder body and forms a sealed sliding pair with the injection push rod driving cylinder body cavity through an injection push rod driving cylinder piston sealing ring sleeved on the outer wall of the injection push rod driving cylinder piston, a piston outer ring is fixed at a position corresponding to the upper part of a piston sealing ring of a material injection push rod driving oil cylinder through a piston outer ring screw, the piston outer ring is limited to the material injection push rod driving oil cylinder piston sealing ring, an oil inlet and return hole of the material injection push rod driving oil cylinder is communicated with a cylinder body cavity of the material injection push rod driving oil cylinder positioned above the material injection push rod driving oil cylinder piston, the upper part of a material injection push disc is fixed with the bottom of the material injection push rod driving oil cylinder piston through material injection push disc upper flange screws distributed at intervals, the lower part of the material injection push disc is fixed with a transition connection disc through material injection push disc lower flange screws distributed at intervals, the upper ends of a group of push rods are fixedly connected with the transition connection disc, and the lower ends of the group of push rods are fixedly connected with a flow; when in use, the die head supporting plate is fixed with a frame of the blow molding machine in a state of being emptied on a floor through the die head supporting plate screw; a core rod up-and-down displacement driving mechanism for enabling the core rod to move up and down is arranged on one upward side of the cylinder cover of the injection push rod driving cylinder, the upper end of the core rod is connected with the core rod up-and-down displacement driving mechanism and extends above the core rod up-and-down displacement driving mechanism, and the lower end of the core rod sequentially penetrates through the cylinder cover of the injection push rod driving cylinder, a piston of the injection push rod driving cylinder, an injection push disc and the core rod cavity in the flow channel and extends out of the core rod cavity expansion cavity in the flow channel, wherein the inner diameter of the lower part of the core rod cavity in the flow channel is larger than that of the core rod cavity in the flow channel; a die sleeve mechanism is arranged between the lower end of the runner inner core and the lower end cavity wall of the injection cylinder sleeve cavity of the injection cylinder sleeve, and a die mechanism is arranged at the lower end of the core rod.
In a more specific embodiment of the present invention, a cooling water introducing hole and a cooling water leading-out hole are formed at one side of the lower portion of the injection pushing tray, a cooling water annular flow passage is formed at the lower portion of the injection push rod driving cylinder piston, the cooling water introducing hole is communicated with the cooling water annular flow passage through a cooling water longitudinal introducing hole also formed in the injection pushing tray, and the cooling water leading-out hole is communicated with the cooling water annular flow passage through a cooling water longitudinal leading-out hole formed in the injection pushing tray, so that the cooling water annular flow passage cools the injection push rod driving cylinder piston; an inner cylinder barrel is sleeved on the core rod and at a position corresponding to the position between the cylinder cover of the material injection push rod driving oil cylinder and the piston of the material injection push rod driving oil cylinder, the upper end of the inner cylinder barrel extends into the cylinder cover of the material injection push rod driving oil cylinder and forms an inner cylinder barrel flange, the inner cylinder barrel flange is fixed with the cylinder cover of the material injection push rod driving oil cylinder through an inner cylinder barrel flange screw at a position corresponding to a cylinder cover step cavity at the central position of the cylinder cover of the material injection push rod driving oil cylinder, an upper sealing ring of the inner cylinder barrel for forming sealing with the cylinder cover of the material injection push rod driving oil cylinder is arranged at the upper end of the inner cylinder barrel, the lower end of the inner cylinder barrel is inserted into a central hole of the piston of the material injection push rod driving oil cylinder, a lower sealing ring of the inner cylinder barrel for forming sealing with the hole of the central hole of the piston is sleeved at the lower end of the inner cylinder barrel, an inner compression ring, the piston inner pressing ring is limited by the inner cylinder lower sealing ring.
In still another specific embodiment of the present invention, the core rod up-and-down displacement driving mechanism includes a core rod up-and-down displacement cylinder, a core rod locking nut, and an intermediate plate, the core rod up-and-down displacement cylinder includes a core rod up-and-down displacement cylinder body, a core rod up-and-down displacement cylinder upper cylinder cover, a core rod up-and-down displacement cylinder lower cylinder cover, and a core rod up-and-down displacement piston, the core rod up-and-down displacement cylinder body is fixed between the core rod up-and-down displacement cylinder upper cylinder cover and the core rod up-and-down displacement cylinder lower cylinder cover by a cylinder cover coupling bolt, an upper cylinder cover oil inlet and outlet hole is opened at one side of the core rod up-and-down displacement cylinder upper cylinder cover, the core rod up-and-down displacement cylinder lower cylinder cover is supported at an upward side of the injection push rod driving, the middle part of the upper and lower displacement piston of the core rod is positioned in the cylinder body of the upper and lower displacement cylinder of the core rod, the central position of the upper part of the upper and lower displacement piston of the core rod extends to form a piston upper column which is matched with the central hole of the upper cylinder cover of the upper and lower displacement cylinder of the core rod in a sliding way, the piston upper column is provided with a piston upper column sealing ring, the piston upper column and the central hole of the upper cylinder cover of the upper and lower displacement cylinder of the core rod form a seal by the piston upper column sealing ring, the central position of the lower part of the upper and lower displacement piston of the core rod extends to form a piston lower column which is matched with the central hole of the lower cylinder cover of the upper and lower displacement cylinder of the core rod in a sliding way, the piston lower column sealing ring is arranged on the piston lower column, the piston lower column sealing ring and the central hole of the lower cylinder cover of, a piston seal ring is embedded on the outer wall of the middle part of the mandrel up-and-down displacement piston, the piston seal ring enables the mandrel up-and-down displacement piston to be in sealing fit with the cavity wall of a cylinder body cavity of a mandrel up-and-down displacement cylinder body, the upward side of the mandrel up-and-down displacement piston and the space between the upper cylinder cover of the mandrel up-and-down displacement cylinder body form an upper cylinder cavity, the downward side of the mandrel up-and-down displacement piston and the space between the lower cylinder cover of the mandrel up-and-down displacement cylinder body form a lower cylinder cavity, the oil inlet and outlet hole of the upper cylinder cover is communicated with the upper cylinder cavity, the oil inlet and outlet hole of the lower cylinder cover is communicated with the lower cylinder cavity, the upper end of the mandrel extends to the upper part of the upper cylinder cover of the mandrel up-and-down displacement cylinder body, a set of connecting screws are arranged on the mandrel locking, and corresponding to the upper part of the piston upper column, an intermediate plate anti-rotation pin is also arranged on the intermediate plate, and the lower part of the intermediate plate anti-rotation pin is fixed with a through hole arranged on an upper cylinder cover of the mandrel up-and-down displacement oil cylinder.
In yet another specific embodiment of the present invention, the mold sleeve mechanism includes a core mold sleeve, a diversion cone sleeve, an outer mold and an outer mold support ring, a core mold sleeve core rod abdicating hole for the lower end of the core rod to pass through is provided at the central position of the core mold sleeve top wall of the core mold sleeve, the core mold sleeve top wall is fixed with the bottom of the runner inner core through a core mold sleeve top wall fixing screw, the diversion cone sleeve is provided at the lower part of the shooting cylinder sleeve cavity of the shooting cylinder sleeve and supported on the outer mold, the outer wall of the diversion cone sleeve contacts with the inner wall of the lower part of the shooting cylinder sleeve cavity, the space between the inner wall of the diversion cone sleeve and the outer wall of the core mold sleeve constitutes a core mold sleeve double-layer melt converging runner, the upper part of the outer mold forms an outer mold support ring matching with the flange ring, the lower part of the outer mold extends to the lower part of the outer mold support ring, the space between the inner wall of the outer mold and the mold mechanism constitutes a double-layer melt leading-out runner, the outer opening die supporting ring is fixed with the bottom of the injection cylinder sleeve through an outer opening die supporting ring screw at a position corresponding to the lower part of the outer opening die supporting ring matched with the flange ring; outer opening die adjusting screws for adjusting an outer opening die are arranged on the shooting cylinder sleeve at intervals at positions corresponding to the outer opening die support ring matched flange rings, and shooting cylinder sleeve heaters are arranged on the outer wall of the shooting cylinder sleeve at intervals along the height direction of the shooting cylinder sleeve; and an outer opening die heater is arranged on the outer wall of the outer opening die.
In still another specific embodiment of the present invention, the die mechanism includes a core die plate, an inner die, and a mandrel defining nut, the core die plate is formed at a central position thereof with a core die plate fixing sleeve which is fixed to the lower end of the mandrel, and an outer wall of the core die plate is in close contact with the lower inner wall of the core die sleeve, the inner die is located below the core die plate, an inner die hole is formed at a central position of the top of the inner die, the inner die hole is fitted over the mandrel, and the top of the inner die is fixed to the core die plate by an inner die fixing screw, the mandrel defining nut is fixed to the lower end of the mandrel extending to the inner die cavity in the inner die cavity corresponding to the inner die, the double-layer melt drawing flow passage is formed between the inner wall of the outer die and the outer wall of the inner die, and a space between the lower edge of the outer wall of the inner die and the lower edge of the inner wall of the outer die is formed as an open or closed double-layer melt discharging port, the double-layer melt discharge opening and closing port is communicated with the double-layer melt leading-out runner.
The technical scheme provided by the invention has the technical effects that: because the runner inner core melt guide channel which is communicated with the feeding disc and is used for supplying the inner melt and the outer melt which are introduced by the feeding disc to the injection mechanism is formed on the runner inner core, and because the inner melt diversion concave channel is formed on the outer wall of the inner melt diversion sleeve of the structural system of the injection mechanism and the outer melt diversion concave channel is formed on the outer wall of the outer melt diversion sleeve, the thickness uniformity of the inner melt and the outer melt which flow down from the inner melt diversion sleeve and the outer melt diversion sleeve can be obviously improved, and the quality of a molten blank can be ensured; because the inner and outer layer melt shunting concave channels respectively obtain good uniform shunting effect for the inner and outer layer melts, the melt flow stroke can be effectively shortened, the melt flow speed is improved, the flow time is shortened, and the efficiency of the blow molding machine for blowing hollow plastic products can be improved.
Drawings
Fig. 1 is a cross-sectional view of the present invention.
Fig. 2 is a detailed structural view of the runner core and the injection mechanism shown in fig. 1.
Fig. 3 is a schematic view illustrating an application of the present invention.
Detailed Description
In order to clearly understand the technical spirit and the advantages of the present invention, the applicant below describes in detail by way of example, but the description of the example is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical scope of the present invention.
In the following description, any concept related to the directions or orientations of up, down, left, right, front, and rear is based on the position state of the drawing being described, and thus it should not be construed as a specific limitation to the technical solution provided by the present invention.
Referring to fig. 1 and 2 in conjunction with fig. 3, there is shown a
The technical key points of the technical scheme provided by the invention are as follows: a runner core
The space between the lower part of the outer wall of the inner
Continuing with FIGS. 1 and 2, the runner
Referring to fig. 2, the inner-layer melt diversion concave channel 724 includes an inner-layer melt first diversion transverse concave channel i 7241, an inner-layer melt second diversion transverse concave channel ii 7242, an inner-layer melt first herringbone diversion concave channel i 7243 and an inner-layer melt second herringbone diversion concave channel ii 7244, the positions of the inner-layer melt first diversion transverse concave channel i 7241 and the inner-layer melt second diversion transverse concave channel ii 7242 on the outer wall of the inner-layer
Continuing with fig. 2, the outer-layer melt diversion concave channel 733 includes an outer-layer melt first diversion transverse concave channel i 7331, an outer-layer melt second diversion transverse concave channel ii 7332, an outer-layer melt first inverted herringbone diversion concave channel i 7333 and an outer-layer melt second inverted herringbone diversion concave channel ii 7334, the outer-layer melt first diversion transverse concave channel i 7331 and the outer-layer melt second diversion transverse concave channel ii 7332 are respectively located on the outer wall of the outer-layer
Preferably, a first blind adjusting hole i 727 may be provided in the outer wall of the inner
Referring to fig. 1 in conjunction with fig. 3, a feeding plate cavity 41 is formed on the upward side of the feeding plate 4 and at a position corresponding to the runner
it is to be understood by the expert and by reading the aforementioned CN 110843190A: the aforementioned feed tray inner layer
As shown in fig. 2, outer guide sleeve fixing and connecting screws 711, outer melt guide sleeve fixing and connecting screws 712 and inner melt guide sleeve fixing and connecting screws 713 are arranged on the guide
Referring to fig. 3 in combination with fig. 1 and 2, the aforementioned material injection push
Because the weight of the piston 313 of the injection push rod driving oil cylinder is relatively heavy, a piston lifting lug 3136 is preset on the upward side of the piston 313 of the injection push rod driving oil cylinder for facilitating the lifting during the assembly.
In order to avoid the thermal expansion of the plunger 313 due to excessive heating and further influence the operation (movement) thereof, a
With reference to fig. 3 and fig. 1 and 2, the mandrel up-down
As shown in fig. 1 and 3, the die
The above-mentioned core-mold-sleeve double-layer melt
The above-mentioned die
When the mandrel up-down displacement piston 214 of the mandrel up-down displacement cylinder 21 (i.e., the mandrel up-down displacement driving cylinder) of the mandrel up-down
On the electric controller of the blow molding machine, namely under the control of a PLC (programmable logic controller), the inner layer melt screw extruder and the outer layer melt screw extruder are both in a working state, the inner layer melt extruded by the inner layer melt screw extruder sequentially passes through a feeding disc inner layer
Under the above circumstances, that is, under the control of the PLC, the core rod up-and-down
In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.
- 上一篇：一种医用注射器针头装配设备
- 下一篇：一种异向双螺旋脱硫挤出机