CN109808110B

CN109808110B - Plastic manufacturing equipment

Info

Publication number: CN109808110B
Application number: CN201910193417.7A
Authority: CN
Inventors: 管越峰; 连升炯; 曹淼; 叶剑涛; 郑仕衡; 杨义之
Original assignee: Ningbo Praise Stationery Co ltd
Current assignee: Ningbo Praise Stationery Co.,Ltd.
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2020-02-07
Anticipated expiration: 2039-03-14
Also published as: CN109808110A; CN110802776B; CN110802776A; CN110802779A; CN110802779B

Abstract

The invention belongs to the technical field of plastic manufacturing, and particularly relates to plastic manufacturing equipment which comprises a movable mould, a mould core and a fixed mould, the manufacturing equipment controls the inward and outward scaling of the sliding mold core in the mold core by driving the driving rod to move up and down through the movable plate, when pouring is needed, the driving rod is controlled to move downwards, 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 formwork shell and the detachable formwork shell on the sliding mold core to move outwards, and pouring is carried out after the sliding mold core is completely unfolded, after the pouring is finished and the plastic is solidified, controlling the driving rod to enable the driving rod to move upwards, enabling the corresponding fixed mould shell and the corresponding detachable mould shell on the sliding mould core to move inwards and be nested with each other by enabling the driving rod to move upwards, and finally enabling the outer diameters of the sliding mould core and the upper mould core and the outer diameters of the lower mould core to be equal, and then completely taking out the mould core; the casting of parts with annular cavities is facilitated.

Description

Plastic manufacturing equipment

Technical Field

The invention belongs to the technical field of plastic manufacturing, and particularly relates to plastic manufacturing equipment.

Background

The plastic molding manufacturing is a method for preparing ware by converting plastic into liquid state and adopting a master mould to cast, the casting process is already appeared at the end 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 manufacturing equipment with thickness changeable at the annular cavity part is very necessary when parts such as annular cavities need to be poured;

the present invention is directed to a plastic manufacturing apparatus that solves the above problems.

Disclosure of Invention

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

A plastic manufacturing apparatus characterized by: the device 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, an upper mold core, a lower mold core and a connecting fixing rod for connecting the upper mold core and the lower mold core, wherein the connecting fixing rod penetrates through a circular groove formed in the driving rod; the sliding mold core is arranged between the upper mold core and the lower mold core; a tension spring for promoting the upper mold core to be tightly attached to the movable mold is arranged between the driving rod and the bottom side surface of the lower mold core; the effect of straining spring is in pouring the in-process, closely combines movable mould and last mould core together through straining spring, prevents to appear the clearance between movable mould and the last mould 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; and driving mechanisms which drive the three detachable formworks and the three fixed formworks to slide inside and outside and are nested in a staggered manner are respectively arranged between the three detachable formworks and the driving rod, every two driving mechanisms in the six driving mechanisms are uniformly distributed in three layers from top to bottom, and the two driving mechanisms in the same group are positioned on two sides of the driving rod on the same horizontal plane.

As a further improvement of the technology, the upper die core is nested on the driving rod, and the upper die core is in sliding fit with the driving rod; the connecting fixing rods are installed on the bottom surface of the inner side of the lower mold core, three connecting blocks are evenly installed on the circumferential direction of the upper side of the connecting fixing rods, the lower mold core is installed on the lower side of the upper mold core through the three connecting blocks, and the three connecting blocks penetrate through three guide grooves formed in the driving rod respectively.

As a further improvement of the technology, the detachable shuttering comprises a detachable shuttering arc board and a detachable shuttering board, wherein the upper and lower ends of the detachable shuttering arc board are provided with fifth inclined planes, the detachable shuttering board is provided with a first inclined plane, the two detachable shuttering boards are installed at the upper and lower ends of the detachable shuttering arc board, and the first inclined plane on the detachable shuttering board is matched with the corresponding fifth inclined plane on the detachable shuttering arc board; 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 sides of the fixed mould shell are provided with symmetrical third inclined planes; 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, the outer circular surface of the driving rod is provided with a driving thread; each pull rod is provided with a driving tooth, each pull rod is fixedly provided with a guide sleeve through a fixed support, the guide sleeves and the pull rods are in sliding fit, and each pull rod is meshed with a driving thread on the driving rod through the driving tooth on the pull rod.

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, the effect of limiting plate is when the slip mold core at the in-process of outwards expanding, the pull rod promotes through the slide and triggers the spring and finally promote the installation shell and outwards remove, after removable mould shell and fixed mould shell moved extreme position, the pull rod continues outwards to move, trigger the spring and continue to compress, the limiting plate is close to corresponding installation shell simultaneously and is close to actuating lever one side and finally rather than contact, thereby 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.

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 fixed shuttering are symmetrically provided with two fourth inclined planes, two sides of the detachable shuttering are symmetrically provided with second inclined planes, and the second inclined planes on the detachable shuttering are matched with the fourth inclined planes on the corresponding fixed shuttering; 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 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.

Compared with the traditional plastic manufacturing technology, the manufacturing equipment designed by the invention controls the inward and outward scaling of the sliding mold core in the mold core by driving the driving rod to move up and down through the movable mold, the sliding mold core is close to the movable mold along the driving rod under the action of tensioning force of the tensioning spring in an initial state, at the moment, the driving rod moves downwards relative to the sliding mold core, the driving rod moves downwards to enable 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 drive mechanism installation.

Fig. 13 is a schematic view of the drive mechanism in cooperation with a drive rod.

Fig. 14 is a schematic view of the distribution of the driving swing links.

Fig. 15 is a schematic view of the driving mechanism.

Figure 16 is a schematic view of a sled installation.

FIG. 17 shows a removable form and a fixed form.

FIG. 18 shows a removable formwork shell and a fixed formwork shell.

FIG. 19 is a schematic view of a split mold skin construction.

FIG. 20 shows a fixed formwork arrangement.

FIG. 21 shows a removable formwork arc and fixed formwork arrangement.

FIG. 22 is a schematic view of a removable formwork arc panel configuration.

FIG. 23 is a schematic view of a removable formwork arrangement.

Fig. 24 is a schematic view of the working principle of the sliding core.

FIG. 25 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; 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; 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 inside of the moving die 1; the mold core 2 is arranged in the movable mold 1 and the fixed mold 3 and is matched 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, an upper mold core 9, a lower mold core 10, and a connecting and fixing rod 8 for connecting the upper mold core 9 and the lower mold core 10, wherein as shown in fig. 8, the connecting and fixing rod 8 passes through a circular groove 13 formed in the driving rod 5; 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. 7 and 9, a tension spring 11 for urging the upper mold core 9 to be closely attached to the movable mold 1 is installed between the driving rod 5 and the bottom side surface of the lower mold core 10; the tension spring 11 is used for tightly combining the movable die 1 and the upper die core 9 together through the tension spring 11 in the pouring process, so that a gap between the movable die 1 and the upper die core 9 is prevented.

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. 17, 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; as shown in fig. 12, a driving mechanism 6 for driving the three detachable formworks 17 and the three fixed formworks 18 to slide inside and outside and to be nested in a staggered manner is respectively installed between the driving rod 5 and the three detachable formworks 17, as shown in fig. 14, two driving mechanisms 6 in each group are evenly distributed in three layers, and two driving mechanisms 6 in the same group are located on two sides of the driving rod 5 on the same horizontal plane.

In summary, the following steps:

the beneficial effects of the design of the invention are as follows: the manufacturing equipment controls the inward and outward scaling of the sliding mold core 4 in the mold core 2 by the up-and-down movement of the movable mold core driving the driving rod 5, under the action of tensioning spring tension in the initial state, the sliding mold core approaches 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 detachable mold shell 17 on the sliding mold core 4 to move outwards, 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 the upper mold core is in close. 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. 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; the bottom surface of the inner side of the lower mold core 10 is provided with a connecting and fixing rod 8, as shown in fig. 10, the upper side of the connecting and fixing rod 8 is circumferentially and uniformly provided with three connecting blocks 15, as shown in fig. 8, the lower mold core 10 is arranged at the lower side of the upper mold core 9 through the three connecting blocks 15, and the three connecting blocks 15 respectively penetrate through three guide grooves 14 formed in the driving rod 5.

As shown in FIG. 23, the formwork 17 comprises a formwork arc 33 and a formwork 26, wherein as shown in FIG. 22, fifth inclined planes 34 are formed at the upper and lower ends of the formwork arc 33, as shown in FIG. 19, the formwork 26 has a first inclined plane 27, as shown in FIG. 23, two formwork arc plates 26 are mounted at the upper and lower ends of the formwork arc 33, and the first inclined plane 27 of the formwork arc plate 26 is engaged with the corresponding fifth inclined plane 34 of the formwork arc plate 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. 20, the two sides of the fixed shuttering 18 are provided with symmetrical third inclined planes 30; as shown in FIG. 22, the removable shuttering arcs 33 are symmetrically provided with two sixth inclined planes 35 at both sides, as shown in FIG. 21, the sixth inclined planes 35 on the removable shuttering arcs 33 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.

As shown in fig. 15, the driving mechanism 6 includes a mounting shell 19, a pull rod 21, a sliding plate 24, and a trigger spring 25, wherein as shown in fig. 11, the mounting shell 19 is mounted 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. 16, 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 arranged in the mounting shell 19 through the sliding plate 24 and the mounting shell 19 in a sliding fit manner, and a trigger spring 25 is arranged between the sliding plate 24 and the inner side surface of the mounting 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 15, two parallel driving swing rods 20 are respectively installed on the upper and lower side surfaces of a pull rod 21 on a driving mechanism 6 installed 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 surface 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. 12, the driving rod 5 has a driving thread on its outer circumferential surface; each pull rod 21 is provided with a driving tooth, a guide sleeve 16 is fixedly arranged on each pull rod 21 through a fixed support 7, the guide sleeve 16 and the pull rod 21 are in sliding fit, and as shown in fig. 13, each pull rod 21 is meshed with a driving thread on the driving rod 5 through the driving tooth on the pull rod.

As shown in fig. 16, each of the pull rods 21 is provided with a limit plate 23, and the limit plate 23 is matched with the outer side surface of the corresponding mounting shell 19 at the 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. 17, 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. 20, two fourth inclined planes 31 are symmetrically formed on both sides of the fixed formwork 18, as shown in fig. 19, the second inclined planes 28 are symmetrically formed on both sides of the removable formwork 26, as shown in fig. 18, the second inclined planes 28 on the removable formwork 26 are matched with the fourth inclined planes 31 on the corresponding fixed 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 trigger spring 25 is always in a compressed state.

The tension spring 11 is an extension spring.

The specific working process is as follows: when the manufacturing equipment designed by the invention is used, in an initial state, under the action of tensioning of the tensioning 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. As shown in fig. 24a, after the sliding mold core 4 is completely unfolded, pouring is performed, after the pouring is completed and the plastic is solidified, the driving rod 5 is controlled to move the driving rod 5 upward, the driving rod 5 moves upward to make six pull rods 21 slide horizontally inward, but since the trigger spring 25 is always in a compressed state, the pull rods 21 do not drive the corresponding installation shells 19 to move during the initial movement of the pull rods 21, when the sliding plate 24 contacts the side surfaces of the corresponding installation shells 19 close to the driving rod 5 during the movement, the sliding plate 24 moves to drive the installation shells 19 to move, the installation shells 19 move to drive the corresponding fixed mold casings 18 and the detachable mold casings 33 of the detachable mold casings 17 to move, and since the sixth inclined surfaces 35 on the detachable mold casings 33 are matched with the third inclined surfaces 30 on the corresponding fixed mold casings 18; therefore, during the movement of the removable mold shell arc 33 and the fixed mold shell 18, the corresponding fixed mold shell 18 and removable mold shell 17 on the sliding mold core 4 will be nested with each other, as shown in fig. 24b, 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.

Claims

1. A plastic manufacturing apparatus characterized by: the device 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, an upper mold core, a lower mold core and a connecting fixing rod for connecting the upper mold core and the lower mold core, wherein the connecting fixing rod penetrates through a circular groove formed in the driving rod; the sliding mold core is arranged between the upper mold core and the lower mold core; a tension spring for promoting the upper mold core to be tightly attached to the movable mold is arranged between the driving rod and the bottom side surface of the lower mold core;

2. A plastic manufacturing apparatus as defined in claim 1, wherein: the upper mold core is nested on the driving rod and is in sliding fit with the driving rod; the connecting fixing rods are installed on the bottom surface of the inner side of the lower mold core, three connecting blocks are evenly installed on the circumferential direction of the upper side of the connecting fixing rods, the lower mold core is installed on the lower side of the upper mold core through the three connecting blocks, and the three connecting blocks penetrate through three guide grooves formed in the driving rod respectively.

3. A plastic manufacturing apparatus as defined in claim 1, wherein: 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 sides of the fixed mould shell are provided with symmetrical third inclined planes; two sixth inclined planes are symmetrically arranged on two sides of the detachable shuttering arc plate, and the sixth inclined planes on the detachable shuttering arc plate are matched with the third inclined planes on the corresponding fixed shuttering.

4. A plastic manufacturing apparatus as defined in claim 3, wherein: 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.

5. A plastic manufacturing apparatus as defined in claim 4, wherein: the outer circular surface of the driving rod is provided with a driving thread; each pull rod is provided with a driving tooth, each pull rod is fixedly provided with a guide sleeve through a fixed support, the guide sleeves and the pull rods are in sliding fit, and each pull rod is meshed with a driving thread on the driving rod through the driving tooth on the pull rod.

6. A plastic manufacturing apparatus as defined in claim 4, wherein: 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.

7. A plastic manufacturing apparatus as defined in claim 3, 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.

8. A plastic manufacturing apparatus as defined in claim 1, wherein: two sides of the fixed shuttering are symmetrically provided with two fourth inclined planes, two sides of the detachable shuttering are symmetrically provided with second inclined planes, and the second inclined planes on the detachable shuttering are matched with the fourth inclined planes on the corresponding fixed shuttering.

9. A plastic manufacturing apparatus as defined in claim 4, wherein: the trigger spring is always in a compressed state.

10. A plastic manufacturing apparatus as defined in claim 1, wherein: the tension spring is an extension spring.