阅读说明：本技术 一种用于塑料的孔内环形槽制造装置 (Manufacturing device for annular groove in hole for plastic ) 是由 管越峰 连升炯 曹淼 戚江浩 卢蝶 董李杰 于 2019-03-14 设计创作，主要内容包括：本发明属于塑料制造技术领域,尤其涉及一种用于塑料的孔内环形槽制造装置,它包括动模、模芯、定模,该模具通过动板带动驱动杆的上下移动控制模芯中的滑动模芯内外缩放,当需要浇注时,控制驱动杆使得驱动杆向下移动,驱动杆向下移动就会使得六个拉杆水平向外滑动,六个拉杆水平向外滑动就会驱动滑动模芯上对应的固定模壳和可拆模壳向外移动,当滑动模芯完全展开后,进行浇注,在浇注完成塑料固化后,控制驱动杆使得驱动杆向上移动,驱动杆向上移动就会使得滑动模芯上对应的固定模壳和可拆模壳向内移动且相互嵌套,最后使得滑动模芯与上模芯与下模芯的外径相等,然后就可以完全将模芯取出；便于铸造具有环形内腔的零件。(The invention belongs to the technical field of plastic manufacturing, in particular to a manufacturing device of an annular groove in a hole for plastic, which comprises a movable die, a die core and a fixed die, wherein the die drives a driving rod to move up and down through a movable plate to control the inward and outward scaling of a sliding die core in the die core, when the plastic needs to be poured, the driving rod is controlled to move down, the driving rod can enable six pull rods to horizontally slide outward and can drive a corresponding fixed die shell and a corresponding detachable die shell on the sliding die core to move outward when the driving rod moves downward, when the sliding die core is completely unfolded, the plastic is poured, after the plastic is poured and cured, the driving rod is controlled to enable the driving rod to move upward, the driving rod moves upward, the corresponding fixed die shell and the corresponding detachable die shell on the sliding die core can move inward and are mutually nested, and finally the outer diameters of, then the mold core can be completely taken out; the casting of parts with annular cavities is facilitated.)

1. An apparatus for manufacturing an annular groove in a hole for plastic, characterized in that: the die comprises a movable die, a die core, a driving rod and a fixed die, wherein the movable die is arranged on the upper side of the fixed die; the mold core is arranged in the movable mold and the fixed mold and matched with the driving rod;

the mold core comprises a sliding mold core, a connecting fixing rod, an upper mold core, a lower mold core, a tensioning spring and a connecting block, wherein the upper mold core is nested on the driving rod and is in sliding fit with the driving rod; the bottom surface of the inner side of the lower mold core is provided with a connecting fixed rod, the upper side of the connecting fixed rod is circumferentially and uniformly provided with three connecting blocks, the lower mold core is arranged on the lower side of the upper mold core through the three connecting blocks, the connecting fixed rod penetrates through a circular groove formed in the driving rod, and the three connecting blocks respectively penetrate through three guide grooves formed in the driving rod; a tension spring is arranged between the driving rod and the bottom side surface of the lower mold core; the sliding mold core is arranged between the upper mold core and the lower mold core;

the sliding mold core comprises a driving mechanism, detachable mold shells and fixed mold shells, wherein the three detachable mold shells and the three fixed mold shells are uniformly and alternately distributed along the circumferential direction of the axis of the upper mold core; a driving mechanism which drives the three detachable formworks and the three fixed formworks to slide inside and outside and is nested in a staggered manner is respectively arranged between the three detachable formworks and the driving rod; two sides of the fixed mould shell are provided with symmetrical third inclined planes;

the detachable formwork comprises a detachable formwork arc plate and detachable formwork shell plates, wherein fifth inclined planes are respectively arranged at the upper end and the lower end of the detachable formwork arc plate, a first inclined plane is arranged on each detachable formwork shell plate, the two detachable formwork shell plates are arranged at the upper end and the lower end of the detachable formwork arc plate, and the first inclined planes on the detachable formwork shell plates are matched with the corresponding fifth inclined planes on the detachable formwork arc plate; two sixth inclined planes are symmetrically arranged on two sides of the arc plate of the detachable formwork, and the sixth inclined planes on the arc plate of the detachable formwork are matched with the third inclined planes on the corresponding fixed formwork;

the driving mechanism comprises an installation shell, a pull rod, a sliding plate and a trigger spring, wherein the installation shell is installed on the inner side cambered surface of the fixed formwork and the inner cambered surface of the detachable formwork arc plate of the detachable formwork; one end of the pull rod is provided with a sliding plate, the other end of the pull rod, which is provided with the sliding plate, is arranged in the mounting shell in a sliding fit manner through the sliding plate and the mounting shell, and a trigger spring is arranged between the sliding plate and the inner side surface of the mounting shell; the driving rod moves up and down to control the horizontal inner and outer sliding of the pull rod;

two parallel driving swing rods are respectively installed on the upper side surface and the lower side surface of a pull rod of a driving mechanism installed on the detachable mould shell in a hinged mode, and one end, far away from the pull rod, of each driving swing rod is connected with the lower side surface of the detachable mould shell in the sliding mould core in a hinged mode;

six connecting lugs are uniformly arranged on the outer circular surface of the driving rod in the circumferential direction, one ends of six connecting swing rods are respectively arranged on the six connecting lugs in a hinged mode, and the other ends of the six connecting swing rods are respectively arranged at one ends, far away from the mounting shell, of six pull rods in six driving mechanisms in a hinged mode; each pull rod is fixedly provided with a guide sleeve through a fixed support, and the guide sleeve is in sliding fit with the pull rod;

each pull rod is provided with a limiting plate, and the limiting plate is matched with the outer side surface of one end, close to the driving rod, of the corresponding mounting shell; the limiting plate is correspondingly matched with the detachable formwork and the fixed formwork;

the guide sleeves are connected with the corresponding pull rods through linear bearings.

2. An apparatus for forming an annular groove in a hole in plastic material, as claimed in claim 1, wherein: the detachable formwork shell plate of the detachable formwork is provided with an arc-shaped first limiting block on the upper end face on one side of the inner circle, and the fixed formwork is provided with a second limiting block on the upper end face and the lower end face on one side of the inner circle.

3. An apparatus for forming an annular groove in a hole in plastic material, as claimed in claim 1, wherein: two sides of the formwork to be fixed are symmetrically provided with two fourth inclined planes, two sides of the detachable formwork shell plate are symmetrically provided with second inclined planes, and the second inclined planes on the detachable formwork shell plate are matched with the fourth inclined planes on the corresponding fixed formwork.

4. An apparatus for forming an annular groove in a hole in plastic material, as claimed in claim 1, wherein: the trigger spring is always in a compressed state.

5. An apparatus for forming an annular groove in a hole in plastic material, as claimed in claim 1, wherein: the tension spring is an extension spring.

6. An apparatus for forming an annular groove in a hole in plastic material, as claimed in claim 1, wherein: the upper end of the driving rod is fixedly arranged on the movable die in a welding mode.

Technical Field

The invention belongs to the technical field of plastic manufacturing, and particularly relates to a manufacturing device for an annular groove in a hole for plastic.

Background

The plastic manufacturing is a method for melting plastic into a liquid state and manufacturing a ware by adopting a master die casting, a casting process is already generated at the end stage of the Xinshi ware era in China, and the original manufacturing process of the bronze ware is developed and matured due to the prosperity of the bronze ware; the mold core can be assembled firstly and then poured with plastics, or the mold core can be inserted after the plastics are poured; however, during demolding, certain requirements are imposed on parts, the mold core can be taken out only by elastic deformation of the elastic material, and the demolding difficulty is high, so that certain demolding temperature and demolding angle are required; if parts such as annular cavities need to be poured, demoulding is more difficult, so that a mould which can change the thickness of the mould at the annular cavity part is very necessary when parts such as annular cavities need to be poured;

the invention designs a manufacturing device for an annular groove in a hole for plastic, which solves the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a device for manufacturing an annular groove in a hole for plastic, which is realized by adopting the following technical scheme.

An apparatus for manufacturing an annular groove in a hole for plastic, characterized in that: the die comprises a movable die, a die core, a driving rod and a fixed die, wherein the movable die is arranged on the upper side of the fixed die; the mold core is arranged in the movable mold and the fixed mold and matched with the driving rod; the mold core is used for shaping the plastic poured into the moving mold and the fixed mold.

The mold core comprises a sliding mold core, a connecting fixing rod, an upper mold core, a lower mold core, a tensioning spring and a connecting block, wherein the upper mold core is nested on the driving rod and is in sliding fit with the driving rod; the bottom surface of the inner side of the lower mold core is provided with a connecting fixed rod, the upper side of the connecting fixed rod is circumferentially and uniformly provided with three connecting blocks, the lower mold core is arranged on the lower side of the upper mold core through the three connecting blocks, the connecting fixed rod penetrates through a circular groove formed in the driving rod, and the three connecting blocks respectively penetrate through three guide grooves formed in the driving rod; the connecting fixing rod and the connecting block are used for fixing the upper mold core and the lower mold core; a tension spring is arranged between the driving rod and the bottom side surface of the lower mold core; the tensioning spring is used for tightly combining the movable die and the upper die core together through the tensioning spring in the pouring process so as to prevent a gap from being formed between the movable die and the upper die core; the sliding mold core is arranged between the upper mold core and the lower mold core.

The sliding mold core comprises a driving mechanism, detachable mold shells and fixed mold shells, wherein the three detachable mold shells and the three fixed mold shells are uniformly and alternately distributed along the circumferential direction of the axis of the upper mold core; a driving mechanism which drives the three detachable formworks and the three fixed formworks to slide inside and outside and is nested in a staggered manner is respectively arranged between the three detachable formworks and the driving rod; the two sides of the fixed mould shell are provided with symmetrical third inclined planes.

The detachable formwork comprises a detachable formwork arc plate and detachable formwork shell plates, wherein fifth inclined planes are respectively arranged at the upper end and the lower end of the detachable formwork arc plate, a first inclined plane is arranged on each detachable formwork shell plate, the two detachable formwork shell plates are arranged at the upper end and the lower end of the detachable formwork arc plate, and the first inclined planes on the detachable formwork shell plates are matched with the corresponding fifth inclined planes on the detachable formwork arc plate; through the cooperation of the fifth inclined plane and the first inclined plane, when the detachable mould shell plate moves towards the middle relative to the detachable mould shell arc plate, the interference between the detachable mould shell plate and the detachable mould shell arc plate can be prevented through the first inclined plane on the fifth inclined plane, and meanwhile, in the pouring process, when the sliding mould core is positioned at the outer side, the two detachable mould shell plates positioned at the upper side and the lower side of the detachable mould shell plate can be limited through the cooperation of the fifth inclined plane on the detachable mould shell arc plate and the first inclined plane on the detachable mould shell plate; two sixth inclined planes are symmetrically arranged on two sides of the arc plate of the detachable formwork, and the sixth inclined planes on the arc plate of the detachable formwork are matched with the third inclined planes on the corresponding fixed formwork; when the pull rod slides inwards on a horizontal plane under the action of the driving rod, the pull rod can drive the sliding plate and the limiting plate which are arranged on the pull rod to move, but the trigger spring is always in a compressed state, so that the pull rod can not drive the corresponding installation shell to move in the initial moving process; so at the in-process that removable mould shell arc board and fixed mould shell removed, the cooperation through the third inclined plane on it and the sixth inclined plane that corresponds removable mould shell arc board will remove together on the fixed mould shell, and at the removal in-process, because removable mould shell arc board reduces with the whole radius of fixed mould shell, so removable mould shell arc board will be along the sixth inclined plane with correspond the third inclined plane on the fixed mould shell and nestle gradually to fixed mould shell inboard.

As a further improvement of the technology, the driving mechanism comprises a mounting shell, a pull rod, a sliding plate and a trigger spring, wherein the mounting shell is mounted on the inner cambered surface of the fixed formwork and the inner cambered surface of the detachable formwork arc plate of the detachable formwork; one end of the pull rod is provided with a sliding plate, the other end of the pull rod, which is provided with the sliding plate, is arranged in the mounting shell in a sliding fit manner through the sliding plate and the mounting shell, and a trigger spring is arranged between the sliding plate and the inner side surface of the mounting shell; the driving rod moves up and down to control the horizontal inner and outer sliding of the pull rod.

Two parallel driving swing rods are respectively installed on the upper side surface and the lower side surface of a pull rod of a driving mechanism installed on the detachable mould shell in a hinged mode, and one end, far away from the pull rod, of each driving swing rod is connected with the lower side surface of the detachable mould shell in the sliding mould core in a hinged mode; for the detachable mould shell, when the driving rod moves to drive the pull rod to slide inside and outside the horizontal direction, the pull rod can drive the detachable mould shell plate in the sliding mould core to move through the two driving swing rods, and because the trigger spring is always in a compressed state, the pull rod cannot drive the corresponding detachable mould shell arc plate to move through the installation shell in the initial moving process of the pull rod; at the moment, the detachable mould shell plate moves towards the direction of the circle center relative to the detachable mould shell plate and finally separates from the detachable mould shell plate, so that the detachable mould shell plate can not interfere with the movement of the detachable mould shell plate in the vertical direction.

As a further improvement of the technology, six connecting lugs are uniformly arranged on the outer circumferential surface of the driving rod in the circumferential direction, one ends of six connecting swing rods are respectively arranged on the six connecting lugs in a hinged manner, and the other ends of the six connecting swing rods are respectively arranged at one ends, far away from the mounting shell, of six pull rods in six driving mechanisms in a hinged manner; each pull rod is fixedly provided with a guide sleeve through a fixed support, and the guide sleeve is in sliding fit with the pull rod; when the driving rod moves up and down, the driving rod can drive the connecting swing rod to move up and down with the end connected with the connecting swing rod, and the two ends of the connecting swing rod are respectively connected with the driving rod and the pull rod in a hinged mode, so that the end connected with the driving rod and the connecting swing rod can swing by moving up and down, and the pull rod can only horizontally slide inside and outside due to the guide of the guide sleeve on the pull rod, so that the connecting swing rod can drive the pull rod connected with the connecting swing rod to slide inside and outside in the horizontal direction.

As a further improvement of the technology, each pull rod is provided with a limiting plate, and the limiting plate is matched with the outer side surface of one end, close to the driving rod, of the corresponding mounting shell; the limiting plate corresponds the cooperation with removable mould shell and fixed mould shell, and the effect of limiting plate is after removable mould shell and fixed mould shell move extreme position, and the pull rod continues outwards to move, and the trigger spring is continued to be compressed, and the limiting plate is close to the installation shell that corresponds simultaneously and is close to actuating lever one side and finally rather than the contact to make pull rod and removable mould shell and fixed mould shell rigid contact, prevent that removable mould shell and fixed mould shell retract under the pressure effect.

As a further improvement of the technology, an arc-shaped first limiting block is arranged on the upper end surface of one side of the inner circle of the detachable mould shell plate of the detachable mould shell, and a second limiting block is arranged on the upper end surface and the lower end surface of one side of the inner circle of the fixed mould shell; when the sliding mold core is unfolded outwards, the pull rod drives the sliding mold core to be unfolded to the maximum, the first limiting block on the detachable mold shell and the second limiting block on the fixed mold shell just move to be in contact with the inner circular surfaces of the upper mold core and the lower mold core, and the sliding mold core is clamped outwards through the upper mold core and the lower mold core; so that the sliding core is fixed.

As a further improvement of the technology, two sides of the formwork to be fixed are symmetrically provided with two fourth inclined planes, two sides of the detachable formwork shell plate are symmetrically provided with second inclined planes, and the second inclined planes on the detachable formwork shell plate are matched with the fourth inclined planes on the corresponding fixed formwork; through the cooperation on fourth inclined plane and second inclined plane, when removable form shell plate moved to the centre for fixed mould shell plate, can prevent to take place to interfere between fixed mould shell plate and the removable form shell plate through the second inclined plane on the fourth inclined plane, simultaneously pouring the in-process, when the slip mold core was in the outside, can be spacing to two removable form shell plates that are located the fixed mould shell plate left and right sides through the cooperation on the fourth inclined plane on the fixed mould shell plate and the second inclined plane on the removable form shell plate.

As a further improvement of the technology, the guide sleeve is connected with the corresponding pull rod through a linear bearing.

As a further improvement of the present technique, the trigger spring is always in a compressed state.

As a further improvement of the present technology, the tension spring is an extension spring.

As a further improvement of the technology, the upper end of the driving rod is fixedly arranged on the movable die in a welding mode.

Compared with the traditional plastic manufacturing technology, the mold designed by the invention has the advantages that the movable mold drives the driving rod to move up and down to control the inward and outward scaling of the sliding mold core in the mold core, the sliding mold core is close to the movable mold along the driving rod under the action of the tension of the tensioning spring in the initial state, the driving rod moves downwards relative to the sliding mold core, the driving rod moves downwards to enable the six pull rods to horizontally slide outwards, the six pull rods horizontally slide outwards to drive the corresponding fixed mold shell and the detachable mold shell on the sliding mold core to move outwards, and after the sliding mold core is completely unfolded, a cylindrical shape with the outer diameter larger than that of the upper mold core is formed, and meanwhile, the upper mold. When pouring is needed, the movable mold is controlled to move downwards to form a closed cavity with the fixed mold; and pouring, after the plastic is solidified by pouring, the movable die drives the driving rod to move upwards, and meanwhile, because the inner diameter of the solidified plastic on the upper side of the sliding die core is smaller than the outer diameter of the sliding die core, the movement of the sliding die core is hindered, so that the sliding die core cannot move together with the driving rod, at the moment, the driving rod moves upwards relative to the sliding die core, six pull rods can horizontally slide inwards, the six pull rods horizontally slide inwards to drive a corresponding fixed die shell and a corresponding detachable die shell on the sliding die core to move inwards and to be nested with each other, finally, the outer diameters of the sliding die core and the upper die core and the lower die core are equal. After the mold core is separated from the solidified plastic, the mold core is completely unfolded under the action of the tension spring to restore the initial state.

Drawings

Fig. 1 is a schematic view of the overall component distribution.

Fig. 2 is a schematic plan view of the internal structural distribution of the integral component.

Fig. 3 is a schematic view of the internal structure installation of the integral component.

FIG. 4 is a schematic view of the mating of a movable mold and a stationary mold.

Fig. 5 is a drive rod mounting schematic.

Fig. 6 is a schematic view of the drive rod configuration.

Fig. 7 is a schematic view of the upper and lower cores mating.

Fig. 8 is a schematic view of the connection of the upper and lower cores.

Fig. 9 is a schematic view of a tension spring installation.

Figure 10 is a schematic view of a connection block installation.

Fig. 11 is a schematic view of the drive mechanism distribution.

Fig. 12 is a schematic view of the driving mechanism.

Figure 13 is a schematic view of a sled installation.

FIG. 14 shows a removable form and a fixed form.

FIG. 15 is a schematic view of a removable formwork panel and a fixed formwork.

FIG. 16 is a schematic view of a split mold skin construction.

FIG. 17 is a schematic view of a fixed formwork arrangement.

FIG. 18 is a schematic view of a removable formwork arc and fixed formwork combination.

FIG. 19 is a schematic view of a removable formwork arc panel configuration.

FIG. 20 is a schematic view of a removable formwork arrangement.

Fig. 21 is a schematic view of the working principle of the sliding core.

Fig. 22 is a schematic view of a sliding pendulum installation.

Number designation in the figures: 1. moving the mold; 2. a mold core; 3. fixing a mold; 4. sliding the mold core; 5. a drive rod; 6. a drive mechanism; 7. fixing and supporting; 8. connecting a fixed rod; 9. an upper mold core; 10. a lower mold core; 11. tensioning the spring; 12. connecting the support lug; 13. a circular groove; 14. a guide groove; 15. connecting blocks; 16. a guide sleeve; 17. a detachable formwork; 18. fixing the formwork; 19. mounting a shell; 20. driving a swing rod; 21. a pull rod; 22. connecting the swing rod; 23. a limiting plate; 24. a slide plate; 25. a trigger spring; 26. the mould shell plate can be disassembled; 27. a first inclined plane; 28. a second inclined plane; 29. a first stopper; 30. a third inclined plane; 31. a fourth slope; 32. a second limiting block; 33. the arc plates of the mould shell can be disassembled; 34. a fifth bevel; 35. a sixth slope.

Detailed Description

As shown in fig. 1, it includes moving die 1, mold core 2, actuating lever 5, stationary die 3, wherein as shown in fig. 2, 4, the moving die 1 is installed on the upside of the stationary die 3, as shown in fig. 6, there are round grooves 13 on the underside of the actuating lever 5, there are three guide slots 14 on the round surface of the upper end of the round groove 13 circumferentially and evenly, as shown in fig. 5, the upper end of the actuating lever 5 is installed on the upper end surface of the inboard of the movable die 1; as shown in fig. 1, the mold core 2 is installed in the movable mold 1 and the fixed mold 3 and cooperates with the driving rod 5; the mold core 2 is used for shaping the plastic poured into the moving mold 1 and the fixed mold 3.

As shown in fig. 3, the mold core 2 includes a sliding mold core 4, a connecting fixing rod 8, an upper mold core 9, a lower mold core 10, a tension spring 11, and a connecting block 15, wherein as shown in fig. 7, the upper mold core 9 is nested on the driving rod 5, and the upper mold core 9 is in sliding fit with the driving rod 5; as shown in fig. 9, the connecting and fixing rod 8 is installed on the bottom surface of the inner side of the lower mold core 10, as shown in fig. 10, three connecting blocks 15 are evenly installed on the upper side of the connecting and fixing rod 8 in the circumferential direction, as shown in fig. 7 and 8, the lower mold core 10 is installed on the lower side of the upper mold core 9 through the three connecting blocks 15, the connecting and fixing rod 8 passes through a circular groove 13 formed on the driving rod 5, and the three connecting blocks 15 respectively pass through three guide grooves 14 formed on the driving rod 5; the connecting fixing rod 8 and the connecting block 15 are used for fixing the upper die core 9 and the lower die core 10; as shown in fig. 8, a tension spring 11 is installed between the driving rod 5 and the bottom side surface of the lower mold core 10; the tensioning spring 11 is used for tightly combining the movable die 1 and the upper die core 9 together through the tensioning spring 11 in the pouring process so as to prevent a gap from being formed between the movable die 1 and the upper die core 9; as shown in fig. 3, the slide core 4 is installed between the upper core 9 and the lower core 10.

As shown in fig. 11, the sliding mold core 4 comprises a driving mechanism 6, a detachable mold shell 17 and a fixed mold shell 18, wherein as shown in fig. 14, the three detachable mold shells 17 and the three fixed mold shells 18 are uniformly and alternately distributed along the axial direction of the upper mold core 9 in the circumferential direction; a driving mechanism 6 which drives the three detachable formworks 17 and the three fixed formworks 18 to slide inside and outside and is nested in a staggered manner is respectively arranged between the driving rod 5 and the three detachable formworks 17 and the three fixed formworks 18; as shown in FIG. 17, the fixed formwork 18 has symmetrical third inclined planes 30 on both sides.

As shown in FIG. 20, the formwork 17 includes a formwork arc 33 and a formwork 26, wherein as shown in FIG. 19, fifth sloped surfaces 34 are formed on both the top and bottom ends of the formwork arc 33, as shown in FIG. 16, the formwork 26 has a first sloped surface 27, as shown in FIG. 20, two formwork panels 26 are mounted on both the top and bottom ends of the formwork arc 33, and the first sloped surface 27 of the formwork panel 26 mates with the corresponding fifth sloped surface 34 of the formwork arc 33; through the cooperation of the fifth inclined plane 34 and the first inclined plane 27, when the split mold shell 26 moves towards the middle relative to the split mold shell arc 33, the interference between the split mold shell and the split mold shell arc 33 can be prevented through the first inclined plane 27 and the fifth inclined plane 34, and meanwhile, when the sliding mold core 4 is positioned at the outer side in the pouring process, the two split mold shell 26 positioned at the upper side and the lower side can be limited through the cooperation of the fifth inclined plane 34 on the split mold shell arc 33 and the first inclined plane 27 on the split mold shell 26; as shown in FIG. 19, two sixth inclined planes 35 are symmetrically arranged on both sides of the detachable shuttering arc plate 33, and as shown in FIG. 18, the sixth inclined planes 35 on the detachable shuttering arc plate are matched with the third inclined planes 30 on the corresponding fixed shuttering 18; when the pull rod 21 slides inwards on a horizontal plane under the action of the driving rod 5, the pull rod 21 can drive the sliding plate 24 and the limiting plate 23 which are installed on the pull rod 21 to move, but the trigger spring 25 is always in a compressed state, so that the pull rod 21 can not drive the corresponding installation shell 19 to move in the initial moving process, when the sliding plate 24 is contacted with the side surface close to the driving rod 5 in the corresponding installation shell 19 in the moving process, the sliding plate 24 moves to drive the installation shell 19 to move, the installation shell 19 moves to drive the corresponding fixed formwork 18 and the detachable formwork arc plate 33 of the detachable formwork 17 to move, and as the sixth inclined surface 35 on the detachable formwork arc plate 33 is matched with the third inclined surface 30 on the corresponding fixed formwork 18; therefore, during the movement of the removable formwork arcs 33 and the fixed formwork 18, the fixed formwork 18 can move together with the third inclined plane 30 of the corresponding removable formwork arc 33, and during the movement, the removable formwork arcs 33 can be gradually nested inside the fixed formwork 18 along the sixth inclined plane 35 and the third inclined plane 30 of the corresponding fixed formwork 18 as the overall radius of the removable formwork arcs 33 and the fixed formwork 18 is reduced.

In summary, the following steps:

the beneficial effects of the design of the invention are as follows: the mould controls the inward and outward scaling of the sliding mould core 4 in the mould core 2 by the up-and-down movement of the movable mould driving the driving rod 5, under the action of the tension spring in the initial state, the sliding mould core approaches to the movable mould along the driving rod, at the moment, the driving rod moves downwards relative to the sliding mould core, the driving rod 5 moves downwards to enable the six pull rods 21 to horizontally slide outwards, the six pull rods 21 horizontally slide outwards to drive the corresponding fixed mould shell 18 and the corresponding detachable mould shell 17 on the sliding mould core 4 to move outwards, after the sliding mould core 4 is completely unfolded, a cylinder with the outer diameter larger than that of the upper mould core is formed, and the upper mould core. When pouring is needed, the movable mold is controlled to move downwards to form a closed cavity with the fixed mold; and pouring, after the plastic is solidified by pouring, the movable die drives the driving rod to move upwards, meanwhile, because the inner diameter of the solidified plastic on the upper side of the sliding die core is smaller than the outer diameter of the sliding die core, the movement of the sliding die core is hindered, the sliding die core cannot move together with the driving rod, at the moment, the driving rod moves upwards relative to the sliding die core, six pull rods 21 can slide horizontally inwards, the six pull rods 21 slide horizontally inwards to drive a corresponding fixed die shell 18 and a corresponding detachable die shell 17 on the sliding die core 4 to move inwards and to be nested with each other, finally, the outer diameters of the sliding die core 4, an upper die core 9 and a lower die core 10 are equal, and then the die. After the mold core is separated from the solidified plastic, the mold core is completely unfolded under the action of the tension spring to restore the initial state.

As shown in fig. 12, the driving mechanism 6 is provided with a shell 19, a pull rod 21, a slide plate 24 and a trigger spring 25, wherein the shell 19 is provided on the inner arc surface of the fixed formwork 18 and the inner arc surface of the detachable formwork arc plate 33 of the detachable formwork 17 as shown in fig. 3 and 11; as shown in fig. 13, one end of the pull rod 21 is provided with a sliding plate 24, one end of the pull rod 21 provided with the sliding plate 24 is installed in the installation shell 19 in a sliding fit manner through the sliding plate 24 and the installation shell 19, and a trigger spring 25 is installed between the sliding plate 24 and the inner side surface of the installation shell 19; the driving rod 5 moves up and down to control the horizontal inward and outward sliding of the pull rod 21.

As shown in fig. 11 and 12, two parallel driving swing rods 20 are mounted on the upper side of a pull rod 21 of a driving mechanism 6 mounted on a detachable mold shell 17 in a hinged manner, and one end of each driving swing rod 20 far away from the pull rod 21 is connected with the detachable mold shell 17 in a sliding mold core 4 and the lower side of a fixed mold shell 18 in a hinged manner; for the detachable mould shell 17, when the driving rod 5 moves to drive the pull rod 21 to slide horizontally and internally, the pull rod 21 can drive the detachable mould shell plate 26 in the sliding mould core 4 to move through the two driving swing rods 20, and because the trigger spring 25 is always in a compressed state, the pull rod 21 cannot drive the corresponding detachable mould shell arc plate 33 to move through the installation shell 19 in the initial moving process of the pull rod 21; at this time, the removable shuttering panels 26 move towards the center of the circle relative to the removable shuttering panels 33, and finally separate from the removable shuttering panels 33, so that the removable shuttering panels 33 will not interfere with the vertical movement of the removable shuttering panels 26.

As shown in fig. 6, six connecting lugs 12 are uniformly installed on the outer circumferential surface of the driving rod 5 in the circumferential direction, as shown in fig. 3, one ends of six connecting swing links 22 are respectively installed on the six connecting lugs 12 in a hinged manner, as shown in fig. 12, the other ends of the six connecting swing links 22 are respectively installed on one ends of six pull rods 21, far away from the installation shell 19, in the six driving mechanisms 6 in a hinged manner; each pull rod 21 is fixedly provided with a guide sleeve 16 through a fixed support 7, and the guide sleeve 16 is in sliding fit with the pull rod 21; when the driving rod 5 moves up and down, the driving rod 5 can drive the connecting swing rod 22 to move up and down with the end connected with the connecting swing rod, and because the two ends of the connecting swing rod are respectively connected with the driving rod 5 and the pull rod 21 in a hinged mode, the end connected with the driving rod 5 and the connecting swing rod 22 can swing by moving up and down, and because the guide sleeve 16 guides the pull rod 21 to enable the pull rod 21 to only horizontally slide inside and outside, the connecting swing rod 22 can move to drive the pull rod 21 connected with the connecting swing rod to slide inside and outside in the horizontal direction.

As shown in fig. 13, each of the pull rods 21 is provided with a limit plate 23, and the limit plate 23 is matched with an outer side surface of the corresponding mounting shell 19 at an end close to the driving rod 5; the limiting plate 23 is correspondingly matched with the detachable formwork 17 and the fixed formwork 18, the limiting plate 23 is used for pushing the trigger spring 25 to finally push the mounting shell 19 to move outwards by the pull rod 21 through the sliding plate 24 when the sliding mold core 4 is unfolded outwards, after the detachable formwork 17 and the fixed formwork 18 move to the limit position, the pull rod 21 continues to move outwards, the trigger spring 25 is compressed continuously, meanwhile, the limiting plate 23 is close to one side, close to the driving rod 5, of the corresponding mounting shell 19 and finally contacts with the driving rod, so that the pull rod 21 is in rigid contact with the detachable formwork 17 and the fixed formwork 18, and the detachable formwork 17 and the fixed formwork 18 retract under the action of pressure.

As shown in fig. 14, an arc-shaped first limiting block 29 is installed on the upper end surface of the shell 26 of the detachable formwork 17 on one side of the inner circle, and a second limiting block 32 is installed on both the upper end surface and the lower end surface of the fixed formwork 18 on one side of the inner circle; when the sliding mold core 4 is unfolded outwards, the pull rod 21 drives the sliding mold core 4 to be unfolded to the maximum, the first limiting block 29 on the detachable mold shell 17 and the second limiting block 32 on the fixed mold shell 18 just move to be in contact with the inner circular surfaces of the upper mold core 9 and the lower mold core 10, and the sliding mold core 4 is clamped outwards through the upper mold core 9 and the lower mold core 10; so that the sliding core 4 is fixed.

As shown in fig. 17, two fourth inclined planes 31 are symmetrically formed on both sides of the fixing formwork 18, as shown in fig. 16, the second inclined planes 28 are symmetrically formed on both sides of the removable formwork 26, as shown in fig. 15, the second inclined planes 28 on the removable formwork 26 are matched with the fourth inclined planes 31 on the corresponding fixing formwork 18; through the cooperation of the fourth inclined plane 31 and the second inclined plane 28, when the split mold shell 26 moves towards the middle relative to the fixed mold shell 18, the second inclined plane 28 and the fourth inclined plane 31 can prevent the interference between the fixed mold shell 18 and the split mold shell 26, and meanwhile, when the sliding mold core 4 is positioned at the outer side in the pouring process, the cooperation of the fourth inclined plane 31 on the fixed mold shell 18 and the second inclined plane 28 on the split mold shell 26 can limit the position of the two split mold shell 26 positioned at the left and right sides of the fixed mold shell 18.

The guide sleeve 16 is connected with the corresponding pull rod 21 through a linear bearing.

The trigger spring 25 is always in a compressed state.

The tension spring 11 is an extension spring.

The upper end of the driving rod 5 is fixedly arranged on the movable die 1 in a welding mode.

The specific working process is as follows: when the mold designed by the invention is used, in an initial state, under the action of the tension spring, the sliding mold core is close to the movable mold along the driving rod, at the moment, the driving rod moves downwards relative to the sliding mold core, the driving rod 5 moves downwards to enable the six pull rods 21 to horizontally slide outwards, the six pull rods 21 horizontally slide outwards to drive the corresponding fixed mold shell 18 and the corresponding detachable mold shell 17 on the sliding mold core 4 to move outwards, and after the sliding mold core 4 is completely unfolded, a cylindrical shape with the outer diameter larger than that of the upper mold core is formed, and meanwhile, the upper mold core is tightly contacted with the movable mold. When the sliding mold core 4 is completely unfolded as shown in fig. 21a, casting is performed, after the casting is completed and the plastic is solidified, the driving rod 5 is controlled to move the driving rod 5 upwards, the driving rod 5 moves upwards to enable six pull rods 21 to slide horizontally inwards, but because the trigger spring 25 is always in a compressed state, the pull rods 21 do not drive the corresponding installation shells 19 to move in the initial moving process of the pull rods 21, when the sliding plate 24 contacts the side surfaces, close to the driving rod 5, in the corresponding installation shells 19 in the moving process, the sliding plate 24 moves to drive the installation shells 19 to move, the installation shells 19 move to drive the corresponding fixed mold shells 18 and the detachable mold shells 33 of the detachable mold shells 17 to move, and because the sixth inclined surfaces 35 on the detachable mold shells 33 are matched with the third inclined surfaces 30 on the corresponding fixed mold shells 18; therefore, during the movement of the removable mold core arc 33 and the fixed mold core 18, the corresponding fixed mold core 18 and removable mold core 17 on the sliding mold core 4 will be nested with each other, as shown in fig. 21b, and finally the outer diameters of the sliding mold core 4 and the upper mold core 9 and the lower mold core 10 will be equal, and then the mold core 2 can be completely removed.