阅读说明：本技术 一种便于冷却脱模的塑料注塑用模具 (Plastic injection mold convenient for cooling and demolding ) 是由 孙超月 洪思宜 于 2020-11-02 设计创作，主要内容包括：本发明涉及塑料注塑技术领域,具体涉及一种便于冷却脱模的塑料注塑用模具,包括凹模具和与其匹配的凸模具,凹模具和凸模具内分别设有第一冷却腔和第二冷却腔,出水管远离存液罐的一端固定连接有第一支管和第二支管,第一支管与凹模具固定连接并连通,第二支管与凸模具固定连接并连通,凹模具和凸模具另一侧设有稳压罐,出水管上固定连接有循环水泵,第一支管和第二支管上设有加热组件,凸模具内设有水压脱模组件。本发明可以方便记性冷却以及脱模动作,冷却充分且脱模效果好,对于脱模顶出的位置保证冷却效果从而减少破坏,同时在注塑时可以使得模具保持一定温度,避免模具较冷导致注塑成型不均匀。(The invention relates to the technical field of plastic injection, in particular to a plastic injection mold convenient for cooling and demolding, which comprises a female mold and a male mold matched with the female mold, wherein a first cooling cavity and a second cooling cavity are respectively arranged in the female mold and the male mold, one end of a water outlet pipe, which is far away from a liquid storage tank, is fixedly connected with a first branch pipe and a second branch pipe, the first branch pipe is fixedly connected and communicated with the female mold, the second branch pipe is fixedly connected and communicated with the male mold, pressure stabilizing tanks are arranged on the other sides of the female mold and the male mold, a circulating water pump is fixedly connected on the water outlet pipe, heating components are arranged on the first branch pipe and the second branch pipe, and a water pressure demolding component. The invention can facilitate the memorability cooling and the demoulding action, has sufficient cooling and good demoulding effect, ensures the cooling effect on the ejection position of the demoulding so as to reduce the damage, and simultaneously can ensure that the mould keeps a certain temperature during the injection moulding so as to avoid the uneven injection moulding caused by the cold mould.)

1. The mold for plastic injection molding convenient for cooling and demolding is characterized by comprising a female mold (1) and a male mold (2) matched with the female mold, wherein a first cooling cavity and a second cooling cavity are respectively arranged in the female mold (1) and the male mold (2), a liquid storage tank (3) is arranged on one side of the female mold (1) and one side of the male mold (2), heat-conducting liquid is stored in the liquid storage tank (3), a water outlet pipe (4) is fixedly connected to the upper end of the liquid storage tank (3), a first branch pipe (5) and a second branch pipe (6) are fixedly connected to one end, far away from the liquid storage tank (3), of the water outlet pipe (4), the first branch pipe (5) is fixedly connected and communicated with the female mold (1), the second branch pipe (6) is fixedly connected and communicated with the male mold (2), a pressure stabilizing tank (7) is arranged on the other side of the female mold (1) and the male mold (2), the utility model discloses a mould, including steady voltage jar (7), one end fixedly connected with third branch pipe (9) and fourth branch pipe (10) of steady voltage jar (7) upper end fixedly connected with inlet tube (8), one end fixedly connected with third branch pipe (9) and fourth branch pipe (10) of steady voltage jar (7) are kept away from in inlet tube (8), third branch pipe (9) and female mould (1) fixed connection and intercommunication, fourth branch pipe (10) and terrace die utensil (2) fixed connection and intercommunication, steady voltage jar (7) through connecting pipe (11) with deposit fluid reservoir (3) fixed connection and intercommunication, it is equipped with refrigerating plant (12) to deposit fluid reservoir (3) internal fixation, fixedly connected with circulating water pump (13) on outlet pipe (4), be equipped with heating element on first branch pipe (5) and second branch pipe (6), be equipped with water pressure drawing of patterns subassembly in terrace.

2. The mold for plastic injection molding convenient for cooling and demolding as claimed in claim 1, wherein an air bag (14) is fixedly arranged in the pressure stabilizing tank (7), a valve core (15) penetrates through the outer wall of the pressure stabilizing tank (7), the valve core (15) and the air bag (14) are fixedly connected and communicated, and an air pressure detecting device is fixedly arranged in the air bag (14).

3. The mold convenient for cooling and demolding for plastic injection molding according to claim 1, wherein the heating assembly comprises heat insulating sleeves (16) fixedly sleeved on the first branch pipe (5) and the second branch pipe (6) respectively, spiral grooves are formed in the inner walls of the heat insulating sleeves (16), electric heating wires (17) are fixedly arranged in the spiral grooves in a matched mode, an electric switch base (18) is arranged between the heat insulating sleeves (16), and the electric heating wires (17) are electrically connected with the electric switch base (18) through shielding wires penetrating through the heat insulating sleeves (16).

4. The mold convenient for cooling and demolding for plastic injection molding according to claim 1, wherein the water pressure demolding assembly comprises an opening arranged on the upper end face of the male mold (2), the opening is communicated with the second cooling cavity, a demolding top column (19) is arranged in the opening in a matched mode, an elastic limiting assembly for limiting the demolding top column (19) is arranged in the second cooling cavity, and a water pressure adjusting assembly is fixedly arranged at the connecting position of the male mold (2) and the fourth branch pipe (10).

5. The mold for plastic injection molding convenient for cooling and demolding as claimed in claim 4, wherein the elastic limiting component comprises a circular groove arranged on the lower end face of the demolding top column (19), the second cooling cavity is internally and horizontally and fixedly provided with a fixing plate (20), an expansion link (21) is arranged in the circular groove, one end of the expansion link (21) is fixedly connected with the bottom wall of the circular groove, the other end of the expansion link (21) is fixedly connected with the fixing plate (20), a limiting spring (22) is sleeved outside the expansion link (21), one end of the limiting spring (22) is fixedly connected with the bottom wall of the circular groove, and the other end of the limiting spring (22) is fixedly connected with the fixing plate (20).

6. The mold for plastic injection molding convenient for cooling and demolding as claimed in claim 4, wherein the water pressure adjusting assembly comprises an adjusting housing (23) fixedly covered outside the fourth branch pipe (10), the adjusting housing (23) is fixedly connected and communicated with the fourth branch pipe (10), the adjusting housing (23) is fixedly connected with the male mold (2), a sealing block (24) corresponding to the fourth branch pipe (10) is arranged in the adjusting housing (23), one end of the sealing block (24) far away from the fourth branch pipe (10) is fixedly connected with a control rod (25), the control rod (25) penetrates through the adjusting housing (23) and extends to the outside, a protective housing (26) is fixedly connected to the side wall of the male mold (2), the control rod (25) penetrates through the protective housing (26) and extends to the inside thereof, one end of the control rod (25) extending to the protective housing (26) is provided with a threaded hole groove, threaded hole inslot matching is equipped with threaded rod (27), fixed mounting has servo motor (28) in protection casing (26), servo motor (28) output and the coaxial fixed connection of threaded rod (27).

7. A mould for injection moulding of plastic material facilitating cooling and demoulding according to claim 1, characterised in that the second branch pipe (6) is provided with a non-return valve (29) fixed in the connection with the male mould (2).

8. The mold for plastic injection molding convenient for cooling and demolding as claimed in claim 5, wherein the telescopic rod (21) and the limiting spring (22) are sleeved with a corrugated closed tube (30), the upper end of the corrugated closed tube (30) is fixedly connected with the bottom wall of the circular groove in a sealing manner, and the lower end of the corrugated closed tube (30) is fixedly connected with the fixing plate (20) in a sealing manner.

9. The mold for plastic injection molding convenient for cooling and demolding as claimed in claim 1, wherein a water level sensor is fixedly arranged in the liquid storage tank (3), a display screen (31) electrically connected with the water level sensor is fixedly arranged outside the liquid storage tank (3), a tank opening is arranged on the upper end face of the liquid storage tank (3), and a tank cover (32) is connected with the tank opening in an internal thread manner.

10. The plastic injection mold facilitating cooling demolding according to claim 1, wherein the plastic injection mold facilitating cooling demolding specifically comprises the following operation steps:

A) the injection molding operation can be carried out after the male mold (2) and the female mold (1) are closed, before injection molding, the circulating water pump (13) works to lead the heat-conducting liquid in the liquid storage tank (3) out through the water outlet pipe (4), then enters a second cooling cavity and a first cooling cavity in the male die (2) and the female die (1) respectively through a first branch pipe (5) and a second branch pipe (6), when passing through the first branch pipe (5) and the second branch pipe (6), the electric switch seat (18) is opened, the two electric heating wires (17) are electrified through the two shielding wires, the heat-conducting liquid flowing through the first branch pipe (5) and the second branch pipe (6) is heated in the heat-insulating sleeve (16), thereby keeping the male die (2) and the female die (1) at a certain temperature, and avoiding the direct cooling of the injection molding material and the die to generate chapping phenomenon during injection molding;

B) after the injection molding is finished, the electric switch seat (18) is closed, the heating effect on the heat conducting liquid is removed, the refrigerating device (12) on the liquid storage tank (3) synchronously works to refrigerate the heat conducting liquid, the circulating water pump (13) works to respectively pour the cooled heat conducting liquid into the first cooling cavity and the second cooling cavity, then respectively enter the pressure stabilizing tank (7) through the third branch pipe (9) and the fourth branch pipe (10), and finally return to the liquid storage tank (3) through the connecting pipe (11) to form a water cooling process;

C) after the cooling finishes, protruding mould (2) and die (1) divide the mould, circulating water pump (13) continuously work this moment, servo motor (28) work is followed, drive threaded rod (27) and rotate, drive control lever (25) remove when threaded rod (27) rotate, control lever (25) drive seals piece (24) and removes, reduce the delivery port size in second cooling chamber, the heat conduction liquid volume that gets into the second cooling chamber this moment is greater than the heat conduction liquid volume that derives the second cooling chamber, inside water pressure of second cooling chamber increases gradually, when water pressure is greater than the elasticity of spacing spring (22), drive drawing of patterns fore-set (19) shifts up, carry out the drawing of patterns action with injection moulding and refrigerated product.

Technical Field

The invention relates to the technical field of plastic injection molding, in particular to a plastic injection molding mold convenient for cooling and demolding.

Background

The plastic product is an essential product in daily production and life, the plastic can be made into various products with different hardness or different structures by means of blow molding, injection molding and the like, and the made products have more advantages and are widely welcomed by people; injection molding is a common means for manufacturing plastic products, and is a main molding device for manufacturing plastic products with various shapes by utilizing a plastic molding die, wherein the injection molding is realized by an injection molding machine and the die, and the injection molding is completed and then a cooling and demolding procedure is needed, so that the manufactured products are taken down.

Chinese patent application No.: CN 201811154433.7; the utility model discloses a plastics mould for injection moulding convenient to cooling drawing of patterns, including lower mould, second hood, baffle and blow vent, the top of lower mould is fixed with first guide post and second guide post, the top at the second guide post is installed to the second hood, the baffle is fixed at the kerve, control magnet fixes on centraxonial top, the top of interior magnet of first interior magnet and second interior magnet all is fixed with the vertical plate, install the function spring on the vertical plate, and the inner wall interconnect of function spring and kerve, blow vent and cooling tube interconnect.

This solution has the following drawbacks:

this scheme is when moulding plastics, and the lower mould of the raw and other materials contact temperature of hot melt state produces the cooling effect earlier at the contact surface easily to make holistic cooling inhomogeneous, the phenomenon of chapping appears, the device is relatively poor to the cooling effect of drawing of patterns position simultaneously, produces the damage to ejecting position when ejecting easily.

Disclosure of Invention

The invention aims to provide a plastic injection mold convenient for cooling and demolding.

In order to achieve the purpose, the invention adopts the following technical scheme:

the mold for plastic injection molding convenient for cooling and demolding comprises a female mold and a male mold matched with the female mold, wherein a first cooling cavity and a second cooling cavity are respectively arranged in the female mold and the male mold, liquid storage tanks are arranged on one sides of the female mold and the male mold, heat conducting liquid is stored in the liquid storage tanks, water outlet pipes are fixedly connected to the upper ends of the liquid storage tanks, one ends, far away from the liquid storage tanks, of the water outlet pipes are fixedly connected with a first branch pipe and a second branch pipe, the first branch pipe is fixedly connected and communicated with the female mold, the second branch pipe is fixedly connected and communicated with the male mold, pressure stabilizing tanks are arranged on the other sides of the female mold and the male mold, a water inlet pipe is fixedly connected to the upper end of each pressure stabilizing tank, a third branch pipe and a fourth branch pipe are fixedly connected to one ends, far away from the pressure stabilizing tanks, of the water inlet pipe, the third branch pipe is fixedly connected and communicated, the pressure stabilizing tank is fixedly connected and communicated with the liquid storage tank through a connecting pipe, a refrigerating device is fixedly arranged in the liquid storage tank, a circulating water pump is fixedly connected onto the water outlet pipe, heating assemblies are arranged on the first branch pipe and the second branch pipe, and a water pressure demolding assembly is arranged in the convex mold.

Further, an air bag is fixedly arranged in the pressure stabilizing tank, an air valve core is arranged on the outer wall of the pressure stabilizing tank in a penetrating mode, the air valve core is fixedly connected and communicated with the air bag, and an air pressure detection device is fixedly arranged in the air bag.

Further, heating element establishes the insulation cover on first branch pipe and second branch pipe including fixed cover respectively, be equipped with the screw-tupe recess on the insulation cover inner wall, match fixedly in the screw-tupe recess and be provided with electric heating wire, two be equipped with between the insulation cover and connect the electric switch seat, two electric heating wire all is connected with connecting the electric switch seat electricity through the shielded wire that runs through the insulation cover setting.

Further, water pressure drawing of patterns subassembly is including setting up the opening on terrace die utensil up end, opening and second cooling chamber intercommunication, the matching is equipped with the drawing of patterns fore-set in the opening, be equipped with in the second cooling chamber and carry out spacing subassembly of spacing elasticity to the drawing of patterns fore-set, the fixed water pressure adjusting part that is equipped with in terrace die utensil and fourth branch connection position.

Further, the elastic limiting assembly comprises a circular groove arranged on the lower end face of the demolding ejection column, a fixing plate is horizontally fixed in the second cooling cavity, a telescopic rod is arranged in the circular groove, one end of the telescopic rod is fixedly connected with the bottom wall of the circular groove, the other end of the telescopic rod is fixedly connected with the fixing plate, a limiting spring is sleeved outside the telescopic rod, one end of the limiting spring is fixedly connected with the bottom wall of the circular groove, and the other end of the limiting spring is fixedly connected with the fixing plate.

Further, the water pressure adjusting assembly includes that the fixed cover establishes the regulation casing outside the fourth branch pipe, adjust casing and fourth branch pipe fixed connection and intercommunication, and adjust casing and terrace die utensil fixed connection, be equipped with the closed block that corresponds with fourth branch pipe position in the regulation casing, the one end fixedly connected with control lever of fourth branch pipe is kept away from to the closed block, the control lever runs through the regulation casing and extends to the outside, fixedly connected with protection casing on the terrace die utensil lateral wall, the control lever runs through protection casing and extends to inside, the control lever extends to one of protection casing and serves and is equipped with the screw thread groove, the screw thread inslot matches and is equipped with the threaded rod, fixed mounting has servo motor in the protection casing, the coaxial fixed connection of servo motor output and threaded rod.

Furthermore, a one-way valve is fixedly arranged at the connecting position of the second branch pipe and the male die.

Furthermore, the telescopic rod and the limiting spring are sleeved with corrugated closed tubes, the upper ends of the corrugated closed tubes are fixedly connected with the bottom wall of the circular groove in a sealing mode, and the lower ends of the corrugated closed tubes are fixedly connected with the fixing plate in a sealing mode.

Further, a water level sensor is fixedly arranged in the liquid storage tank, a display screen electrically connected with the water level sensor is fixedly arranged outside the liquid storage tank, a tank opening is formed in the upper end face of the liquid storage tank, and a tank cover is connected to the tank opening in an internal thread mode.

Further, the working steps of the plastic injection mold convenient for cooling and demolding specifically comprise:

A) the injection molding operation can be carried out after the male mold and the female mold are assembled, before injection molding, the circulating water pump works to lead out the heat-conducting liquid in the liquid storage tank through the water outlet pipe, then the heat-conducting liquid respectively enters the second cooling cavity and the first cooling cavity in the male mold and the female mold through the first branch pipe and the second branch pipe, the electric switch seat is opened when the heat-conducting liquid passes through the first branch pipe and the second branch pipe, the two electric heating wires are electrified through the two shielding wires, the heat-conducting liquid flowing through the first branch pipe and the second branch pipe is heated in the heat insulation sleeve, so that the male mold and the female mold keep a certain temperature, and the phenomenon of chapping caused by direct cooling of an injection molding material in contact with the mold is avoided during injection molding;

B) after the injection molding is finished, the electric switch seat is closed, the heating effect on the heat conducting liquid is removed, the refrigerating device on the liquid storage tank works synchronously, the heat conducting liquid is refrigerated, the circulating water pump works to pour the cooled heat conducting liquid into the first cooling cavity and the second cooling cavity respectively, then the cooled heat conducting liquid enters the pressure stabilizing tank through the third branch pipe and the fourth branch pipe respectively, and finally the cooled heat conducting liquid returns to the liquid storage tank through the connecting pipe to form a water cooling process;

C) after the cooling finishes, protruding mould and die utensil divide the mould, circulating water pump lasts the work this moment, servo motor work after that, it rotates to drive the threaded rod, the drive control pole removes when the threaded rod rotates, the control lever drive seals the piece and removes, reduce the delivery port size in second cooling chamber, the heat conduction liquid measure that gets into the second cooling chamber this moment is greater than the heat conduction liquid measure of deriving the second cooling chamber, the inside water pressure of second cooling chamber increases gradually, when water pressure is greater than spacing spring's elasticity, the drive drawing of patterns fore-set shifts up, carry out the drawing of patterns action with injection moulding and refrigerated product.

The invention has the beneficial effects that:

the device can rapidly cool the male die and the female die by arranging the water-cooling circulation structure, so that a product formed by injection molding can be rapidly cooled, the cooling cavity arranged inside the device can avoid the contact between cooling liquid and the product and can also perform higher cooling action, and meanwhile, the device can heat conducting liquid in the water-cooling circulation during injection molding, so that the male die and the female die have certain temperature during injection molding, the advanced cooling caused by the lower temperature of the male die and the female die is avoided, and the chapping phenomenon during cooling is avoided; meanwhile, the ejection structure is combined in the water-cooling circulation structure, water pressure is formed in the cooling cavity by controlling the amount of injected and guided water, the product is ejected out for demolding, meanwhile, the ejection position can fully enter heat-conducting liquid due to the arrangement of the circular groove, the ejection position is fully cooled, and the phenomenon that the product is damaged when the product is ejected due to uneven cooling is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below.

FIG. 1 is a schematic left-view perspective view of the present invention;

FIG. 2 is a schematic diagram of a right-side perspective view of the present invention;

FIG. 3 is a schematic bottom perspective view of the present invention;

FIG. 4 is a schematic perspective view of a hydraulic pressure regulating assembly according to the present invention;

FIG. 5 is a schematic view of the internal three-dimensional structure of the male mold of the present invention;

FIG. 6 is a schematic view showing the internal structure of the surge tank of the present invention;

fig. 7 is a schematic sectional view of the thermal insulation cover of the present invention.

In the figure:

the device comprises a concave die 1, a convex die 2, a liquid storage tank 3, a water outlet pipe 4, a first branch pipe 5, a second branch pipe 6, a pressure stabilizing tank 7, a water inlet pipe 8, a third branch pipe 9, a fourth branch pipe 10, a connecting pipe 11, a refrigerating device 12, a circulating water pump 13, an air bag 14, a valve core 15, a heat insulation sleeve 16, an electric heating wire 17, an electric switch seat 18, a demoulding top column 19, a fixing plate 20, a telescopic rod 21, a limiting spring 22, an adjusting shell 23, a sealing block 24, a control rod 25, a protective shell 26, a threaded rod 27, a servo motor 28, a check valve 29, a corrugated sealing pipe 30, a display screen 31 and a tank cover 32.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some components of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product.

Referring to fig. 1, 2 and 3, a plastic injection mold convenient for cooling and demolding comprises a female mold 1 and a male mold 2 matched with the female mold, the female mold 1 and the male mold 2 are combined to perform injection molding operation, an injection port is arranged on the female mold 1, a first cooling cavity and a second cooling cavity are respectively arranged in the female mold 1 and the male mold 2 and are respectively used for cooling the female mold 1 and the male mold 2, a liquid storage tank 3 is arranged on one side of the female mold 1 and one side of the male mold 2, heat conducting liquid is stored in the liquid storage tank 3, the upper end of the liquid storage tank 3 is fixedly connected with a water outlet pipe 4, one end, far away from the liquid storage tank 3, of the water outlet pipe 4 is fixedly connected with a first branch pipe 5 and a second branch pipe 6, the first branch pipe 5 is fixedly connected and communicated with the female mold 1, the second branch pipe 6 is fixedly connected and communicated with the male mold 2, and the first cooling cavity and the second cooling cavity are both communicated with the, the other side of the female die 1 and the male die 2 is provided with a pressure stabilizing tank 7, the pressure stabilizing tank 7 is used for compensating the pressure in a circulating water path, and plays a role in stabilizing pressure during the ejection and demolding, the upper end of the pressure stabilizing tank 7 is fixedly connected with a water inlet pipe 8, one end of the water inlet pipe 8, which is far away from the pressure stabilizing tank 7, is fixedly connected with a third branch pipe 9 and a fourth branch pipe 10, the third branch pipe 9 is fixedly connected and communicated with the female die 1, the fourth branch pipe 10 is fixedly connected and communicated with the male die 2, the first cooling cavity and the second cooling cavity are both communicated with the pressure stabilizing tank 7, the pressure stabilizing tank 7 is fixedly connected and communicated with a liquid storage tank 3 through a connecting pipe 11, so as to form a complete circulating water path, a refrigerating device 12 is fixedly arranged in the liquid storage tank 3, and a prior art is adopted, the heat conducting liquid in the liquid storage tank 3 can be refrigerated and radiated, let the heat conduction liquid in the circulation water route carry out the circulation action, be equipped with heating element on first branch pipe 5 and the second branch pipe 6, can heat the heat conduction liquid in first branch pipe 5 and the second branch pipe 6, be equipped with water pressure drawing of patterns subassembly in the terrace die utensil 2, utilize water pressure to carry out drawing of patterns action.

As shown in fig. 1 and fig. 6, an air bag 14 is fixedly arranged in the surge tank 7 for compensating the water pressure in the circulating water path, when the ejection and demolding operation is performed, the amount of heat transfer fluid entering the surge tank 7 will be compensated by the air bag 14, so as to ensure the normal circulation of the water path, a valve core 15 is arranged on the outer wall of the surge tank 7 in a penetrating manner, the valve core 15 adopts the prior art and can inflate the air bag 14, the valve core 15 is fixedly connected and communicated with the air bag 14, an air pressure detection device is fixedly arranged in the air bag 14, the air pressure detection device adopts the prior art, and the air pressure can be timely supplemented when the insufficient pressure in the air bag 14 is detected.

As shown in fig. 1, 2 and 7, the heating assembly comprises heat insulating sleeves 16 respectively fixedly sleeved on the first branch pipe 5 and the second branch pipe 6, spiral grooves are formed in the inner walls of the heat insulating sleeves 16, electric heating wires 17 are fixedly arranged in the spiral grooves in a matching manner, the electric heating wires 17 adopt the prior art and can generate heat after being electrified, an electric switch base 18 is arranged between the two heat insulating sleeves 16, the two electric heating wires 17 are electrically connected with the electric switch base 18 through shielding wires penetrating through the heat insulating sleeves 16, the electric switch base 18 is communicated with an external power supply, and whether the electric switch base is electrified can be controlled.

As shown in fig. 1, fig. 2, fig. 4 and fig. 5, the water pressure demoulding assembly comprises an opening arranged on the upper end face of the male mould 2, the opening is communicated with the second cooling cavity, a demoulding top column 19 is arranged in the opening in a matching manner, an elastic limiting assembly for limiting the demoulding top column 19 is arranged in the second cooling cavity and used for limiting the position of the demoulding top column 19 when demoulding is not performed, and a water pressure adjusting assembly is fixedly arranged at the connecting position of the male mould 2 and the fourth branch pipe 10 and used for adjusting the water pressure in the second cooling cavity.

As shown in fig. 5, the spacing subassembly of elasticity is including setting up the circular recess of terminal surface under drawing of patterns fore-set 19, can let heat conduction liquid fully get into, thereby fully cool off the ejecting position, the fixed plate 20 that is equipped with of second cooling intracavity level, be equipped with telescopic link 21 in the circular recess, 21 one end of telescopic link and circular recess diapire fixed connection, the telescopic link 21 other end and 20 fixed connection of fixed plate, telescopic link 21 plays the limiting displacement, 21 overcoat of telescopic link is equipped with spacing spring 22, spacing spring 22 one end and circular recess diapire fixed connection, the spacing spring 22 other end and 20 fixed connection of fixed plate, spacing spring 22 provides elasticity, 19 positions to the drawing of patterns fore-set are restricted.

As shown in fig. 4, the water pressure adjusting assembly includes an adjusting housing 23 fixedly covered outside the fourth branch pipe 10, the adjusting housing 23 is fixedly connected and communicated with the fourth branch pipe 10, and the adjusting housing 23 is fixedly connected with the male mold 2, a sealing block 24 corresponding to the fourth branch pipe 10 is arranged in the adjusting housing 23, a control rod 25 is fixedly connected to one end of the sealing block 24 far away from the fourth branch pipe 10, the control rod 25 can control the position of the sealing block 24, the control rod 25 penetrates through the adjusting housing 23 and extends to the outside, a protective housing 26 is fixedly connected to the side wall of the male mold 2, the protective housing 26 plays a protective role, the control rod 25 penetrates through the protective housing 26 and extends to the inside, a threaded hole slot is arranged at one end of the control rod 25 extending to the protective housing 26, a threaded rod 27 is arranged in the threaded hole slot in a matching manner, a servo motor 28 is fixedly installed in the protective housing 26, an output end of the servo, the servo motor 28 adopts the prior art, and the threaded rod 27 is driven to rotate after the operation, and the drive control rod 25 moves, thereby driving the sealing block 24 to move, sealing the water inlet position of the fourth branch pipe 10, reducing the water outlet amount of the second cooling cavity, and realizing the effect of increasing the water pressure in the second cooling cavity.

As shown in fig. 3 and 5, a check valve 29 is fixedly arranged at the connecting position of the second branch pipe 6 and the male die 2, so that when the water pressure is regulated, the heat conducting liquid is prevented from leaking out from the second branch pipe 6, and the water pressure is ensured to be regulated correctly.

As shown in fig. 5, the telescopic rod 21 and the limiting spring 22 are sleeved with a corrugated closed tube 30, the upper end of the corrugated closed tube 30 is fixedly connected with the bottom wall of the circular groove in a sealing manner, the lower end of the corrugated closed tube 30 is fixedly connected with the fixing plate 20 in a sealing manner, and the corrugated closed tube 30 protects the telescopic rod 21 and the limiting spring 22 from being corroded by the heat-conducting liquid;

as shown in fig. 2, a water level sensor is fixedly arranged in the liquid storage tank 3, the water level sensor adopts the prior art to detect the amount of the heat conducting liquid in the liquid storage tank 3, a display screen 31 electrically connected with the water level sensor is fixedly arranged outside the liquid storage tank 3 to display the residual heat conducting liquid amount, a tank opening is arranged on the upper end surface of the liquid storage tank 3, a tank cover 32 is connected with the tank opening through internal threads, and the heat conducting liquid can be supplemented by unscrewing the tank cover 32.

The working steps of the plastic injection mold convenient for cooling and demolding specifically comprise:

A) the injection molding operation can be carried out after the male mold 2 and the female mold 1 are assembled, before injection molding, the circulating water pump 13 works to lead out the heat-conducting liquid in the liquid storage tank 3 through the water outlet pipe 4, then the heat-conducting liquid respectively enters the second cooling cavity and the first cooling cavity in the male mold 2 and the female mold 1 through the first branch pipe 5 and the second branch pipe 6, the electric switch seat 18 is opened when the heat-conducting liquid passes through the first branch pipe 5 and the second branch pipe 6, the two electric heating wires 17 are electrified through the two shielding wires, the heat-conducting liquid passing through the first branch pipe 5 and the second branch pipe 6 is heated in the heat preservation sleeve 16, so that the male mold 2 and the female mold 1 are kept at a certain temperature, and the phenomenon of chapping caused by direct cooling of an injection molding material in contact with the mold is avoided during injection molding;

B) after the injection molding is finished, the electric switch seat 18 is closed, the heating effect on the heat conducting liquid is removed, the refrigerating device 12 on the liquid storage tank 3 synchronously works to refrigerate the heat conducting liquid, the circulating water pump 13 works to respectively pour the cooled heat conducting liquid into the first cooling cavity and the second cooling cavity, then the cooled heat conducting liquid respectively enters the pressure stabilizing tank 7 through the third branch pipe 9 and the fourth branch pipe 10, and finally the cooled heat conducting liquid returns to the liquid storage tank 3 through the connecting pipe 11 to form a water cooling process;

C) after the cooling finishes, terrace die utensil 2 and die utensil 1 divide the mould, circulating water pump 13 lasts the work this moment, servo motor 28 work after that, drive threaded rod 27 rotates, drive control lever 25 removes when threaded rod 27 rotates, control lever 25 drive seals the piece 24 and removes, reduce the delivery port size in second cooling chamber, the heat conduction liquid volume that gets into the second cooling chamber this moment is greater than the heat conduction liquid volume that derives the second cooling chamber, the inside water pressure of second cooling chamber increases gradually, when water pressure is greater than limiting spring 22's elasticity, drive drawing of patterns fore-set 19 moves upwards, carry out the drawing of patterns action with injection moulding and refrigerated product.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.