CN114379034A

CN114379034A - Forming device is used in production of rubber ring that only takes off

Info

Publication number: CN114379034A
Application number: CN202210280143.7A
Authority: CN
Inventors: 葛洪兵
Original assignee: Anhui Lujiang Huayi Rubber Products Co ltd
Current assignee: Anhui Lujiang Huayi Rubber Products Co ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-04-22

Abstract

The invention relates to the technical field of production of anti-stripping rubber rings, in particular to a forming device for producing the anti-stripping rubber rings, which comprises a die cover, a die cavity and a die core with a thin-wall structure, the mold core is fixedly connected into the mold cavity, the mold cover is connected onto the mold cavity in a sealing and detachable manner, the outer wall of the mold core is provided with a blind hole, the inner wall of the mold core is provided with a through hole, the through hole is communicated with the blind hole, a piston is matched in the blind hole in a sliding way, one end of the piston is arc-shaped, the curvature of the arc is the same as that of the outer wall of the mold core, flow channels are arranged on two sides of the piston, a driving structure is arranged in the mold core, the piston is driven to slide in the blind hole, the air pressure increased in the die cavity is discharged through the runner, and the air pressure in the die cavity is reduced through the piston, so that the purposes of improving the flow rate of the melt and reducing the time length for the melt to flow in the die cavity are achieved.

Description

Forming device is used in production of rubber ring that only takes off

Technical Field

The invention relates to the technical field of production of anti-stripping rubber rings, in particular to a forming device for production of anti-stripping rubber rings.

Background

The anti-slip rubber ring is produced by distributing and fixing a certain number of steel teeth in soft and hard rubber according to the size of the rubber ring, so that the anti-slip rubber ring can resist axial force and prevent slipping.

In the prior art, the anti-stripping rubber ring is produced by adopting an injection molding mode, and the production process comprises the following steps: as shown in fig. 1, the mold is opened, the tooth blocks are distributed in the mold, after the mold is closed, the melt is injected into the mold through the injection holes, the mold is released after the melt is cooled and shaped, and the excessive glue material at the edge is removed to obtain the anti-stripping rubber ring.

However, in the actual production process, the injection molding filling and cooling processes are interactive, as shown in fig. 2-3, when the melt flows into the mold cavity through the pouring system for filling, the melt which first contacts the surface of the cavity wall will form a condensed layer on the surface of the cavity wall due to a certain temperature difference with the melt due to the lower temperature of the cavity wall, and as the melt continues to be filled, the melt will continue to flow forward from the surface of the condensed layer, the thickness of the condensed layer will gradually increase, which will cause the narrowing of the actual cavity runner, the surface area ratio of the runner narrowing to the melt is increased, the resistance generated between the melt and the inner wall of the runner during the flow will also increase, and the presence of the tooth blocks in the mold will further increase the resistance of the melt flow, therefore, the melt flow rate is reduced and the flow length of the melt in the mold is unchanged under the condition of being blocked melt, the flow time of the melt in the mold is increased, the flow time of the front end of the melt is prolonged, the cooling and shaping degree of the melt is further increased, and when the front end of the melt forms a closed loop, obvious weld marks are easy to appear, stress concentration is easy to generate at the weld marks, and the use performance of the plastic part is reduced.

Disclosure of Invention

The invention aims to solve the defect that the flow rate of a melt in a mold is reduced in the prior art, and provides a forming device for producing a stripping-proof rubber ring.

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

the utility model provides a stop taking off forming device for rubber ring production, includes die cover, die cavity and thin-walled structure's mold core, the mold core rigid coupling extremely in the die cavity, the die cover can be connected with sealing the dismantlement on the die cavity, the blind hole has been seted up on the mold core outer wall, the through-hole has been seted up on the mold core inner wall, the through-hole with the blind hole intercommunication, slidable cooperation has the piston in the blind hole, piston one end is the arc, this curved camber with the camber of mold core outer wall is the same, the runner has been seted up to the both sides of piston, be equipped with the drive structure in the mold core, with the drive the piston is in slide in the blind hole.

Further, the drive structure includes connecting rod, slider, memory wire, pivot and arc rack, but connecting rod sliding fit is in the through-hole, connecting rod one end rigid coupling is in on the piston, the other end rigid coupling has the spur rack, the slider rigid coupling is in on the arc rack tip, curved spout has been seted up on the mold core, slider slidable cooperation is in the spout, the rotatable installation of pivot is in the mold core, the rigid coupling has the gear in the pivot, the gear with arc rack phase-match, the rigid coupling has the clockwork spring in the pivot, the rigid coupling has ring gear on the clockwork spring, ring gear with the spur rack phase-match, memory wire one end articulates on the arc rack, the other end articulates on the mold core inner wall.

Furthermore, the die cavity is provided with a control structure to control whether the connecting rod moves or not, the control structure comprises a sliding sleeve, a baffle and a second return spring, the die cavity is internally provided with an L-shaped mounting groove, the sliding sleeve is slidably matched in the mounting groove, the baffle is slidably matched in the mounting groove, the sliding sleeve is fixedly connected to the baffle, the sliding sleeve is slidably matched with a sliding rod, the top end of the sliding rod is fixedly connected with a wedge-shaped limiting block, the connecting rod is provided with a wedge-shaped limiting groove, the limiting block is matched with the limiting groove, the sliding rod is sleeved with a first return spring, one end of the second return spring is fixedly connected to the baffle, the other end of the second return spring is fixedly connected to the bottom of the mounting groove, the top of the mounting groove is provided with a notch, the notch is slidably matched with a pressing block, and the pressing block is fixedly connected to the baffle, the height of the pressing block is greater than the depth of the notch.

Furthermore, an ejection structure is arranged on the die cavity and comprises a rack, the rack is fixedly connected to the die cavity, a guide hole is formed in the rack, a guide pillar is slidably matched in the guide hole, one end of the guide pillar is fixedly connected to the die cover, and the other end of the guide pillar is fixedly connected to the base;

the sliding hole has been seted up to the die cavity bottom, the slope of sliding hole sets up, slidable cooperation has the guide arm in the sliding hole, guide arm bottom rigid coupling has the swivel becket, the swivel becket is rotatable to be installed on the base, slidable cooperation has the gasket in the die cavity, the gasket shape with the inside shape phase-match of die cavity, guide arm top rigid coupling is in on the gasket.

The forming device for producing the anti-stripping rubber ring has the beneficial effects that: when the anti-stripping rubber ring is produced, the mold cover is sealed on the mold cavity, the melt is injected into the mold cavity from the injection molding hole, and gas expanded by high temperature in the mold cavity enters the blind hole from the runners on two sides of the piston and is discharged from the through hole, so that the blockage of the increase of air pressure in the mold cavity to the melt flow is prevented; when the melt heats the die core to a certain threshold value, the driving structure can drive the piston to slide in the blind hole, the piston slides in the blind hole to reduce the air pressure in the die cavity, the pressure intensity in the die cavity is smaller than the external pressure intensity, and the flow rate of the melt can be increased under the action of pressure difference. The invention discharges the increased air pressure of the die cavity through the runner and reduces the air pressure in the die cavity through the piston so as to achieve the purposes of improving the flow rate of the melt and reducing the time length of the melt flowing in the die cavity.

Drawings

Fig. 1 is a die for a prior art rubber ring.

Fig. 2 is a first schematic diagram of the flow of the melt inside the mold.

FIG. 3 is a second schematic view of the flow of the melt within the mold.

Fig. 4 is a schematic structural diagram of a forming device for producing a rubber ring with a slip-stop function according to the present invention.

Fig. 5 is a top view of a forming device for producing a rubber ring.

FIG. 6 is a cross-sectional view taken along the direction D-D of a molding device for producing a rubber ring for preventing separation, which is provided by the invention.

Fig. 7 is an enlarged view of a portion a of the forming device for producing the anti-drop rubber ring provided by the invention.

Fig. 8 is an enlarged view of a portion B of the forming device for producing a rubber stopper ring according to the present invention.

Fig. 9 is an enlarged view of the position C of the forming device for producing the anti-drop rubber ring provided by the invention.

Fig. 10 is a first schematic structural diagram of a mold cavity of a molding apparatus for producing a rubber stopper ring according to the present invention.

FIG. 11 is a top view of a mold cavity of a molding apparatus for producing a rubber come-off prevention ring according to the present invention.

FIG. 12 is a bottom view of the mold cavity of the molding apparatus for producing a rubber come-off preventing ring according to the present invention.

Fig. 13 is a schematic structural diagram of a mold cavity of a molding device for producing a rubber ring with a slip prevention function according to the second embodiment of the present invention.

FIG. 14 is a front view of a mold cavity of a molding apparatus for producing a rubber come-off preventive ring according to the present invention.

FIG. 15 is a sectional view taken along the direction F-F of a molding apparatus for producing a rubber stopper ring according to the present invention.

Fig. 16 is a schematic structural diagram of a piston of a molding device for producing a rubber ring.

Fig. 17 is a schematic view of an installation structure of a gasket of a molding device for producing a rubber ring.

Fig. 18 is a top view of a mold cavity and a mold core of a molding apparatus for producing a rubber stopper ring according to the present invention.

FIG. 19 is a sectional view taken along the direction E-E of a molding apparatus for producing a rubber stopper ring according to the present invention.

1. A mold cover; 2. a base; 3. a frame; 4. a guide post; 5. a mold cavity; 6. a mold core; 601. blind holes; 602. a through hole; 7. a piston; 701. a flow channel; 8. a connecting rod; 9. mounting grooves; 10. a sliding sleeve; 11. a slide bar; 12. a first return spring; 13. a limiting block; 14. a baffle plate; 15. a second return spring; 16. a notch; 17. briquetting; 18. straight rack; 19. a rotating shaft; 20. a clockwork spring; 21. a ring gear; 22. a gear; 23. an arc-shaped rack; 24. a chute; 25. a slider; 26. a memory wire; 27. a guide bar; 28. a rotating ring; 29. a gasket; 30. a slide hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1

Referring to fig. 4-11, a forming device for producing a rubber ring with a slip-stop function comprises a mold cover 1, a mold cavity 5 and a mold core 6 with a thin-wall structure, wherein the mold core 6 is fixedly connected into the mold cavity 5, the mold cover 1 is connected onto the mold cavity 5 in a sealing and dismounting manner, a blind hole 601 is formed in the outer wall of the mold core 6, a through hole 602 is formed in the inner wall of the mold core 6, the through hole 602 is communicated with the blind hole 601, a piston 7 is slidably matched in the blind hole 601, one end of the piston 7 is arc-shaped, the curvature of the arc is the same as that of the outer wall of the mold core 6, flow channels 701 are formed in two sides of the piston 7, and a driving structure is arranged in the mold core 6 to drive the piston 7 to slide in the blind hole 601.

When the anti-stripping rubber ring is produced, the mold cover 1 is sealed on the mold cavity 5, a melt is injected into the mold cavity 5 from the injection molding hole 501, gas expanded by high temperature in the mold cavity 5 enters the blind hole 601 from the flow channel 701 on two sides of the piston 7 and is discharged from the through hole 602, and the blockage of the melt flow caused by the increase of air pressure in the mold cavity 5 is prevented;

when the melt heats the mold core 6 to a certain threshold value, the driving structure can drive the piston 7 to slide into the blind hole 601, the piston 7 slides into the blind hole 601 to reduce the air pressure in the mold cavity 5, so that the pressure in the mold cavity 5 is smaller than the external pressure, and the flow rate of the melt can be increased under the action of the pressure difference.

Based on the above explanation, the present invention discharges the increased air pressure in the mold cavity 5 through the runner 701 and reduces the air pressure in the mold cavity 5 through the piston 7, so as to achieve the purpose of increasing the flow rate of the melt and reducing the time period for which the melt flows in the mold cavity 5.

Example 2

Further, the driving structure comprises a connecting rod 8, a sliding block 25, a memory metal wire 26, a rotating shaft 19 and an arc-shaped rack 23, the connecting rod 8 can be in sliding fit in the through hole 602, one end of the connecting rod 8 is fixedly connected to the piston 7, the other end of the connecting rod is fixedly connected with the spur rack 18, the sliding block 25 is fixedly connected to the end portion of the arc-shaped rack 23, an arc-shaped sliding groove 24 is formed in the mold core 6, the sliding block 25 can be in sliding fit in the sliding groove 24, the rotating shaft 19 can be rotatably installed in the mold core 6, a gear 22 is fixedly connected to the rotating shaft 19, the gear 22 is matched with the arc-shaped rack 23, a clockwork spring 20 is fixedly connected to the rotating shaft 19, a ring gear 21 is fixedly connected to the clockwork spring 20, the ring gear 21 is matched with the spur rack 18, one end of the memory metal wire 26 is hinged to the arc-shaped rack 23, and the other end of the memory metal wire is hinged to the inner wall of the mold core 6.

The melt flows within the mold cavity 5 and, when the mold core 6 is heated to a threshold temperature (which is not less than the memory wire 26 transformation temperature), the memory wire 26 deforms, as shown in fig. 12-15, and the memory wire 26 deforms from the contracted state to the expanded state when heated to the threshold temperature.

Under the state shown in fig. 15, when the memory wire 26 is deformed to the extended state, the arc-shaped rack 23 is driven to rotate anticlockwise, the arc-shaped rack 23 rotates anticlockwise, the driving gear 22 rotates anticlockwise, the gear 22 rotates anticlockwise to drive the rotating shaft 19 to rotate anticlockwise, the rotating shaft 19 drives the ring gear 21 to rotate anticlockwise through the clockwork spring 20, as the spur rack 18 is meshed with the ring gear 21, the spur rack 18 is driven to move rightwards when the ring gear 21 rotates anticlockwise, the spur rack 18 moves rightwards to drive the connecting rod 8 to move rightwards, the connecting rod 8 moves rightwards to drive the piston 7 to move rightwards, so that the piston 7 slides towards the blind hole 601, and the pressure inside the mold cavity 5 is reduced.

Example 3

Furthermore, a control structure is arranged on the die cavity 5 to control whether the connecting rod 8 moves or not, the control structure comprises a sliding sleeve 10, baffle 14 and second reset spring 15, set up the mounting groove 9 of L shape in the die cavity 5, slide sleeve 10 slidable cooperation is in mounting groove 9, baffle 14 slidable cooperation is in mounting groove 9, the slide sleeve 10 rigid coupling is on baffle 14, slidable cooperation has slide bar 11 in the slide sleeve 10, slide bar 11 top rigid coupling has wedge-shaped stopper 13, wedge-shaped spacing groove 801 has been seted up on connecting rod 8, stopper 13 and spacing groove 801 phase-match, the cover is equipped with first reset spring 12 on

slide bar

11, 15 one end rigid couplings of second reset spring are on baffle 14, the other end rigid coupling is in mounting groove 9 bottom, notch 16 has been seted up at mounting groove 9 top, slidable cooperation has briquetting 17 in the notch 16, briquetting 17 rigid coupling is on baffle 14, briquetting 17 highly is greater than notch 16's the degree of depth.

As shown in fig. 6-9, the second return spring 15 is always kept in a compressed state, the baffle 14 is located at the highest point under the action of the second return spring 15, and the top of the pressing block 17 extends out of the notch 16 because the height of the pressing block 17 is greater than the depth of the notch 16.

The baffle 14 is located the peak, and the sliding sleeve 10 also can be located the peak this moment, and under the elastic force effect of first reset spring 12, stopper 13 can be located spacing groove 801, refer to fig. 7, and when stopper 13 was located spacing groove 801, stopper 13 only allowed connecting rod 8 to move to the right, did not allow connecting rod 8 to move to the left.

Example 4

Furthermore, an ejection structure is arranged on the die cavity 5, the ejection structure comprises a rack 3, the rack 3 is fixedly connected to the die cavity 5, a guide hole 301 is formed in the rack 3, a guide pillar 4 is slidably matched in the guide hole 301, one end of the guide pillar 4 is fixedly connected to the die cover 1, and the other end of the guide pillar is fixedly connected to the base 2;

sliding hole 30 has been seted up to die cavity 5 bottom, and sliding hole 30 slope sets up, and slidable cooperation has guide arm 27 in the sliding hole 30, and the rigid coupling has swivel ring 28 bottom guide arm 27, and swivel ring 28 is rotatable to be installed on base 2, and slidable cooperation has gasket 29 in the die cavity 5, and gasket 29 shape and the inside shape phase-match of die cavity 5, the rigid coupling of guide arm 27 top are on gasket 29.

Referring to fig. 16-19, the frame 3 is in a fixed state, the mold cavity 5 is fixed on the frame 3, when the mold is closed, the base 2 is driven to move downwards, the base 2 drives the mold cover 1 to move downwards through the guide posts 4, the mold cover 1 moves downwards to seal the opening of the mold cavity 5, and the base 2 moves downwards and also drives the gasket 29 to slide downwards in the mold cavity 5 through the guide rods 27.

Pouring into die cavity 5 through injection hole 501, the fuse-element of pouring is located gasket 29 top, treat the cooling design back, carry out the drawing of patterns to the rubber ring, when the drawing of patterns, drive base 2 shifts up, base 2 shifts up and moves up through guide pillar 4 drive die cover 1, make die cover 1 shift away from die cavity 5, base 2 shifts up the in-process and still can drive guide arm 27 and slide in sliding hole 30, guide arm 27 slides in sliding hole 30 and can drive gasket 29 and take place to rotate for die cavity 5, can drive the rubber ring and deflect in die cavity 5 when gasket 29 rotates, the rubber ring deflects the back, it is interior, outer lane and die cavity 5 inner wall junction will separate.

Therefore, when the ejection structure provided by the invention is used for demolding a rubber ring, the axial force and the tangential force are applied to the rubber ring, the rubber ring can deflect and move in the demolding process under the action of the axial force and the tangential force, and the ejection structure is used for demolding compared with the traditional method in which force is applied in a single direction, so that the damage caused by overlarge unidirectional stress at the joint of the rubber ring and the inner wall of the mold cavity 5 is effectively prevented.

The working principle is as follows:

as shown in fig. 6 and 15, in the initial state after the mold cover 1 and the mold cavity 5 are clamped, the tooth blocks are distributed on the shim 29, and the melt is poured into the mold cavity 5 through the injection hole 501.

The gas expanded by high temperature in the die cavity 5 enters the blind hole 601 through the runners 701 at the two sides of the piston 7 and is exhausted from the through hole 602, so that the obstruction of melt flow caused by the increase of air pressure in the die cavity 5 is prevented.

When the melt heats the mold core 6 to a threshold temperature (which is not less than the memory wire 26 transformation temperature), the memory wire 26 deforms, as shown in fig. 12-15, and the memory wire 26 deforms from the contracted state to the expanded state when heated to the threshold temperature.

In the state shown in fig. 15, when the memory wire 26 deforms to the extended state, the arc-shaped rack 23 is driven to rotate counterclockwise, the arc-shaped rack 23 rotates counterclockwise to drive the gear 22 to rotate counterclockwise, the gear 22 rotates counterclockwise to drive the rotating shaft 19 to rotate counterclockwise, the rotating shaft 19 drives the ring gear 21 to rotate counterclockwise through the clockwork spring 20, due to the fact that the spur rack 18 is meshed with the ring gear 21, the spur rack 18 is driven to move rightward when the ring gear 21 rotates counterclockwise, the spur rack 18 moves rightward to drive the connecting rod 8 to move rightward, the connecting rod 8 moves rightward to drive the piston 7 to move rightward, and therefore the piston 7 slides into the blind hole 601, so that the pressure inside the mold cavity 5 is reduced, the pressure inside the mold cavity 5 is smaller than the external pressure, and the flow rate of the melt is increased under the action of the pressure difference.

From the above, the flow rate of the melt is increased, and the time period for which the melt flows in the cavity 5 is reduced, so that the occurrence of weld marks when the melt forms a closed loop is prevented.

And (5) obtaining the anti-stripping rubber ring after the melt is closed-loop and cooled and shaped, and carrying out demoulding operation.

When the mold is removed, the base 2 is driven to move upwards, the base 2 moves upwards to drive the mold cover 1 to move upwards through the guide pillar 4, the mold cover 1 is moved away from the mold cavity 5, the guide rod 27 can be driven to slide in the sliding hole 30 in the process that the base 2 moves upwards, the guide rod 27 can drive the gasket 29 to rotate relative to the mold cavity 5 when sliding in the sliding hole 30, the gasket 29 can drive the rubber ring to deflect in the mold cavity 5 when rotating, and after the rubber ring deflects, the joint of the inner ring and the outer ring of the rubber ring and the inner wall of the mold cavity 5 can be separated.

After the anti-stripping rubber ring is demoulded, the residual heat of the die cavity 5 is still higher than the metamorphosis temperature of the memory metal wire 26, and at the moment, the die cavity 5 is cooled for the second time.

During the secondary cooling process of the mold cavity 5, the temperature of the mold cavity 5 will gradually decrease to be lower than the transformation temperature of the memory wire 26, and the memory wire 26 will reset, i.e. change from the above-mentioned extension state to the contraction state.

The memory metal wire 26 can drive the arc-shaped rack 23 to rotate clockwise in the resetting process, the arc-shaped rack 23 rotates the drive gear 22 clockwise, the gear 22 rotates clockwise to drive the rotating shaft 19 to rotate clockwise, the limiting block 13 is positioned in the limiting groove 801 under the elastic force action of the first reset spring 12 and the second reset spring 15 at the moment, the connecting rod 8 cannot move leftwards to reset, the straight rack 18 cannot move leftwards to reset, and therefore the rotating shaft 19 rotates clockwise to charge the spiral spring 20 and cannot drive the ring gear 21 to rotate clockwise.

After the memory wire 26 is reset, a second injection molding operation may be performed.

When the second injection molding is carried out, the mold closing is firstly carried out, when the mold closing is carried out, the base 2 is driven to move downwards, the base 2 drives the mold cover 1 to move downwards through the guide post 4, the mold cover 1 moves downwards to be sealed on the opening of the mold cavity 5, the base 2 moves downwards and can also drive the gasket 29 to slide downwards in the mold cavity 5 through the guide rod 27, when the gasket 29 moves to the lowest end in the mold cavity 5, downward pressure can be applied to the pressing block 17, the pressing block 17 is pressed to move downwards and drives the baffle 14 to move downwards, the baffle 14 drives the sliding sleeve 10 to move downwards, the sliding sleeve 10 moves downwards and drives the sliding rod 11 to move downwards, the sliding rod 11 drives the limiting block 13 to move downwards, the limiting block 13 separates from the limiting groove 801 after moving downwards, and the limiting block 13 does not block the connecting rod 8 from moving leftwards any more.

After the limiting block 13 does not block the left movement of the connecting rod 8, the spring 20 after being charged can drive the ring gear 21 to rotate clockwise, the ring gear 21 rotates clockwise to drive the spur rack 18 to move left, the spur rack 18 moves left to drive the connecting rod 8 to move left, the connecting rod 8 moves left to drive the piston 7 to move left, and the piston 7 resets to the position of the initial state after moving left.

Repeating the above process to continuously produce the anti-stripping rubber ring.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A forming device for producing a rubber ring with a slip-proof function is characterized by comprising a die cover (1), a die cavity (5) and a die core (6) with a thin-wall structure, the mold core (6) is fixedly connected into the mold cavity (5), the mold cover (1) is connected on the mold cavity (5) in a sealing and disassembling way, the outer wall of the mold core (6) is provided with a blind hole (601), the inner wall of the mold core (6) is provided with a through hole (602), the through hole (602) is communicated with the blind hole (601), a piston (7) is slidably matched in the blind hole (601), one end of the piston (7) is arc-shaped, the curvature of the arc is the same as that of the outer wall of the mold core (6), two sides of the piston (7) are provided with a flow passage (701), and a driving structure is arranged in the mold core (6) to drive the piston (7) to slide in the blind hole (601).

2. The molding device for producing the anti-drop rubber ring according to claim 1, wherein the driving structure comprises a connecting rod (8), a sliding block (25), a memory metal wire (26), a rotating shaft (19) and an arc-shaped rack (23), the connecting rod (8) is slidably fitted in the through hole (602), one end of the connecting rod (8) is fixedly connected to the piston (7), the other end of the connecting rod is fixedly connected to a straight rack (18), the sliding block (25) is fixedly connected to the end of the arc-shaped rack (23), an arc-shaped sliding groove (24) is formed in the mold core (6), the sliding block (25) is slidably fitted in the sliding groove (24), the rotating shaft (19) is rotatably mounted in the mold core (6), a gear (22) is fixedly connected to the rotating shaft (19), the gear (22) is matched with the arc-shaped rack (23), a spring (20) is fixedly connected to the rotating shaft (19), the clockwork spring is characterized in that a ring gear (21) is fixedly connected to the clockwork spring (20), the ring gear (21) is matched with the straight rack (18), one end of the memory metal wire (26) is hinged to the arc-shaped rack (23), and the other end of the memory metal wire is hinged to the inner wall of the mold core (6).

3. The forming device for producing the anti-stripping rubber ring as claimed in claim 2, wherein a control structure is arranged on the die cavity (5) to control whether the connecting rod (8) moves or not.

4. The molding device for producing the anti-drop rubber ring according to claim 3, wherein the control structure comprises a sliding sleeve (10), a baffle (14) and a second return spring (15), the mold cavity (5) is internally provided with an L-shaped installation groove (9), the sliding sleeve (10) is slidably matched in the installation groove (9), the baffle (14) is slidably matched in the installation groove (9), the sliding sleeve (10) is fixedly connected on the baffle (14), the sliding sleeve (10) is slidably matched with a sliding rod (11), the top end of the sliding rod (11) is fixedly connected with a wedge-shaped limiting block (13), the connecting rod (8) is provided with a wedge-shaped limiting groove (801), the limiting block (13) is matched with the limiting groove (801), the sliding rod (11) is sleeved with a first return spring (12), one end of the second return spring (15) is fixedly connected on the baffle (14), the other end rigid coupling is in mounting groove (9) bottom, notch (16) have been seted up at mounting groove (9) top, slidable cooperation has briquetting (17) in notch (16), briquetting (17) rigid coupling is in on baffle (14), the height of briquetting (17) is greater than the degree of depth of notch (16).

5. The forming device for producing the anti-drop rubber ring according to claim 1 or 2, wherein the mold cavity (5) is provided with an ejection structure.

6. The forming device for producing the anti-drop rubber ring according to claim 5, wherein the ejection structure comprises a frame (3), the frame (3) is fixedly connected to the mold cavity (5), a guide hole (301) is formed in the frame (3), a guide post (4) is slidably fitted in the guide hole (301), one end of the guide post (4) is fixedly connected to the mold cover (1), and the other end of the guide post (4) is fixedly connected to the base (2);

sliding hole (30) have been seted up to die cavity (5) bottom, sliding hole (30) slope sets up, slidable cooperation has guide arm (27) in sliding hole (30), guide arm (27) bottom rigid coupling has swivel becket (28), swivel becket (28) rotatable installation be in on base (2), slidable cooperation has gasket (29) in die cavity (5), gasket (29) shape with die cavity (5) inside shape phase-match, guide arm (27) top rigid coupling is in on gasket (29).