EVA shoe sole injection molding device

Abstract

The application discloses an EVA shoe sole injection molding device, which comprises a workbench, a first movable mold, a second movable mold and an injection molding assembly. The first movable mold and the second movable mold are provided with sliding seats on both sides, the sliding seats are slidingly arranged on the workbench, the workbench is provided with a first power assembly for driving the sliding seats to slide horizontally, the sliding seats are provided with a second power assembly for driving the first movable mold and the second movable mold to rotate, the first movable mold comprises a first mold base and two first forming dies, the two first forming dies are slidingly installed on both sides of the first mold base, and the second movable mold comprises a second mold base and two second forming dies. The two first forming dies and the two second forming dies can be used to spray the release agent on the forming grooves on the other group of the first forming dies and the second forming dies when one group of the first forming dies and the second forming dies are used to injection mold the soles, and the automatic demolding and unloading can be realized during the mold opening process after the soles are formed.

Description

Technical Field

[0001] This invention discloses an EVA shoe sole injection molding device, belonging to the technical field of shoe sole production equipment. Background Technology

[0002] EVA soles are soles made of EVA material, which have high resilience and tensile strength, good toughness, and good shock absorption and cushioning performance. Most existing EVA shoe soles are injection molded. Traditional injection molds include an upper mold, a lower mold, and an injection cavity formed by the two molds. The mold needs to be heated to a certain temperature before the EVA raw material is injected into the mold cavity through the material tube of the injection barrel. After a certain period of heating and pressurization, the molded sole is formed. After the sole is formed, it needs to be demolded. However, before injection molding, a release agent needs to be sprayed on the mold surface to facilitate the demolding and unloading of the formed sole. Currently, most spraying relies on manual spraying or adding a horizontal spraying device between the upper and lower molds. However, this method requires the upper and lower molds to remain in a stopped state after the molds are opened. At the same time, the upper and lower mold structure is not conducive to the automatic unloading of the sole, and the sole needs to be removed manually. Therefore, traditional EVA shoe sole injection molding is not only cumbersome in terms of manual operation and not conducive to automation control, but also has a relatively limited injection molding efficiency. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and to provide an EVA shoe sole injection molding device.

[0004] The present invention achieves the above-mentioned objective through the following technical solution: an EVA shoe sole injection molding device, comprising a worktable, a first moving mold, a second moving mold, and an injection molding assembly. Sliding seats are provided on both sides of the first and second moving molds. The sliding seats are slidably mounted on the worktable. A first power assembly for driving the sliding seats to slide horizontally is provided on the worktable. A second power assembly for driving the first and second moving molds to rotate is provided on the sliding seats. The first moving mold includes a first mold base and two first molding molds, which are slidably mounted on both sides of the first mold base. The second moving mold includes a second mold base and two second molding molds, which are slidably mounted on the second mold base. Limiting components for restricting the sliding distance of the first and second molding molds are provided on both the first and second mold bases. A first pressing rod is provided on the side of the two first molding molds that are close to each other. A first pressing rod is provided on the side of the two second molding molds that are close to each other. A second pressing rod is provided, with one end of the first pressing rod and the second pressing rod connected to one of the first molding molds and the second molding mold, passing through the other first molding mold and the second molding mold. The limiting component applies a force to the first molding mold and the second molding mold respectively, causing one end of the first pressing rod and the second pressing rod to protrude from the surface of the first molding mold and the second molding mold. The first power component is provided with a protrusion for applying a pushing force to the first pressing rod and the second pressing rod. A push rod is installed on both the first molding mold and the second molding mold, and the push rod passes through the first molding mold and the second molding mold. Both the first molding mold and the second molding mold are provided with injection grooves. The injection component is installed on one side of the worktable corresponding to the injection groove. The middle of the worktable is provided with a through hole to avoid the rotation of the first moving mold and the second moving mold. The first power component is also provided with a spraying component for spraying release agent onto the first molding mold and the second molding mold.

[0005] Preferably, the first power assembly includes a first cylinder and a push plate. An mounting plate is provided on the worktable. The first cylinder is fixed on the mounting plate, and the piston of the first cylinder passes through the mounting plate and is fixedly connected to the push plate. The protrusion is provided on the push plate. A limit sleeve is installed on the sliding seat. A limit rod is installed on the push plate. The limit rod has a stepped shaft structure, and the end with the larger diameter is slidably disposed in the limit sleeve.

[0006] Preferably, the spraying assembly includes a connecting pipe, a feed pipe, a nozzle, and a transmission component. The push plate is provided with a mounting block for mounting the feed pipe and the connecting pipe. The connecting pipe is horizontal, and both ends of the connecting pipe are rotatably connected to the mounting block. Multiple nozzles are provided and are installed on the connecting pipe at equal intervals. The feed pipe is rotatably mounted with the connecting pipe. The transmission component is mounted on the push plate and is used to drive the connecting pipe to reciprocate and rotate at a preset angle.

[0007] Preferably, the transmission component includes a second cylinder and a rack, the push plate is provided with a sliding groove, the rack is slidably disposed in the sliding groove, the second cylinder is mounted on the push plate, and the piston of the second cylinder is fixedly connected to the rack, and a transmission gear is installed on the connecting pipe, the transmission gear meshing with the rack.

[0008] Preferably, the second power component includes a first motor and a drive gear. Both sides of the first mold base and the second mold base are provided with drive shafts. The drive shafts are rotatably connected to the sliding base. One of the drive shafts is provided with a driven gear. The first motor is mounted on the sliding base, and the output shaft of the first motor is fixedly connected to the drive gear. The drive gear meshes with the driven gear. The worktable is provided with a slide rail that cooperates with the sliding base.

[0009] Preferably, the sliding seat is provided with a first limiting bolt, a first spring, and a nut at the position corresponding to the limiting sleeve. The first limiting bolt passes through the sliding seat and is connected to the nut. The first spring is sleeved on the outside of the first limiting bolt and applies a force close to the limiting rod to the first limiting bolt. The limiting assembly includes a second limiting bolt and a second spring. One end of the second limiting bolt passes through the first forming mold and the second forming mold and is fixedly connected to the first mold base and the second mold base, respectively. Both the first forming mold and the second forming mold are provided with countersunk holes for installing the second spring. The second spring is sleeved on the outside of the second limiting bolt and applies a force against the first mold base and the second mold base to the first forming mold and the second forming mold.

[0010] Preferably, both the first molding die and the second molding die are provided with molding grooves for molding shoe soles. When the first molding die and the second molding die are respectively in contact with the first mold base and the second mold base, the height of the push rod protruding from the molding groove is equal to the height of the first pressing rod and the second pressing rod protruding from the first molding die and the second molding die.

[0011] Preferably, the injection molding assembly includes an injection barrel, a hopper, a second motor, a screw, and a heating seat. A fixing block for mounting the screw is provided on the worktable. The output shaft of the second motor is fixedly connected to the screw. The heating seat is slidably mounted on the worktable. The injection barrel is mounted on the heating seat. The hopper is mounted on the injection barrel and is provided with a feeding pipe. The screw is threadedly connected to the heating seat.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] By setting up a first moving mold, a second moving mold, a first power component, a second power component, and a spraying component, the second power component drives the first moving mold and the second moving mold to rotate, thereby realizing the switching of the positions of the two first molding molds and the two second molding molds. This allows one set of first molding molds and the second molding mold to spray release agent onto the surface of the molding grooves on the other set of first molding molds and the second molding mold while the mold is closed and injection molding is in progress, eliminating the need for manual spraying of release agent.

[0014] By setting a limiting component and an ejector rod, the limiting component applies a force to the first molding mold and the second molding mold respectively, which abuts against the first mold base and the second mold base. In this way, during the process of closing the first molding mold and the second molding mold, one end of the ejector rod moves from a state of protruding from the molding groove to a state of being flush with the bottom of the molding groove. After the sole is injection molded, the ejector rod moves relative to the first molding mold and the second molding mold, so that the ejector rod generates a pushing force on the sole, thereby completing automatic unloading. This enables automatic injection molding, spraying of release agent and unloading, effectively improving the production efficiency of EVA soles. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an EVA shoe sole injection molding device according to the present invention;

[0016] Figure 2 This is a schematic diagram of the first moving mold and the second moving mold in the mold-closing state in this invention;

[0017] Figure 3 This is a schematic diagram of the first molding die in the state of being coated with release agent in this invention;

[0018] Figure 4 This is a schematic diagram of the first molding die in the closed state in this invention;

[0019] Figure 5 This is a schematic diagram of the second molding die in the closed state in this invention;

[0020] Figure 6 This is a schematic diagram of the limiting component and the ejector pin in the mold-closed state in this invention;

[0021] Figure 7 This is a schematic diagram of the first and second pressing rods in the mold-closed state in this invention.

[0022] Figure 8 This is a partial structural schematic diagram of the second molding die in this invention;

[0023] Figure 9 This is a partial structural diagram of the connection between the limiting sleeve and the sliding seat in this invention;

[0024] Figure 10This is a schematic diagram of the structure of the first power assembly and the spraying assembly in this invention;

[0025] Figure 11 for Figure 10 A magnified view of a section at point A in the middle;

[0026] Figure 12 This is a schematic diagram of the injection molding component in this invention;

[0027] Reference numerals: 1. Worktable; 2. Through hole; 3. Injection molding assembly; 4. Slide rail; 5. First cylinder; 6. Mounting plate; 7. Push plate; 8. Second power assembly; 9. First moving mold; 10. Second moving mold; 11. Spraying assembly; 12. First power assembly; 13. First mold base; 14. Ejector rod; 15. First molding mold; 16. First pressing rod; 17. Sliding seat; 18. First motor; 19. Driven gear; 20. Transmission shaft; 21. Limiting sleeve; 22. Drive gear; 23. Second molding mold; 24. Second 25. Mold base; 26. Second limiting bolt; 27. Second pressing rod; 28. Second spring; 29. ​​Molding groove; 20. First limiting bolt; 30. Nut; 31. First spring; 32. Limiting rod; 33. Slide groove; 34. Nozzle; 35. Protrusion; 36. Feed pipe; 37. Mounting block; 38. Connecting pipe; 39. Second cylinder; 40. Rack; 41. Transmission gear; 42. Hopper; 43. Feeding pipe; 44. Second motor; 45. Screw; 46. Heating seat; 47. Injection barrel; 48. Injection groove. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1-12As shown, an EVA shoe sole injection molding device includes a worktable 1, a first moving mold 9, a second moving mold 10, and an injection molding assembly 3. Sliding seats 17 are provided on both sides of the first moving mold 9 and the second moving mold 10. The sliding seats 17 are slidably mounted on the worktable 1. A first power assembly 12 for driving the sliding seats 17 to slide horizontally is provided on the worktable 1. A second power assembly 8 for driving the first moving mold 9 and the second moving mold 10 to rotate is provided on the sliding seats 17. The first moving mold 9 includes a first mold base 13 and two first molding molds 15. The first molding die 15 is slidably mounted on both sides of the first mold base 13. The second moving die 10 includes a second mold base 24 and two second molding dies 23. The two second molding dies 23 are slidably disposed on the second mold base 24. Both the first mold base 13 and the second mold base 24 are provided with limiting components to restrict the sliding distance of the first molding die 15 and the second molding die 23. A first pressing rod 16 is provided on the side of the two first molding dies 15 that is close to each other, and a second pressing rod 26 is provided on the side of the two second molding dies 23 that is close to each other. One end of the first pressing rod 16 and the second pressing rod 26, which connect the molding mold 15 and the second molding mold 23, passes through the other first molding mold 15 and the second molding mold 23. The limiting component applies a force to the first molding mold 15 and the second molding mold 23, respectively, to abut against the first mold base 13 and the second mold base 24, so that one end of the first pressing rod 16 and the second pressing rod 26 protrudes from the surface of the first molding mold 15 and the second molding mold 23. The first power component 12 is provided with a force for applying a thrust to the first pressing rod 16 and the second pressing rod 26. The first mold base 13 and the second mold base 24 are both equipped with ejector pins 35 and ejector pins 14. The ejector pins 14 are set through the first molding mold 15 and the second molding mold 23. The first molding mold 15 and the second molding mold 23 are both provided with injection grooves 48. The injection assembly 3 is installed on one side of the worktable 1 corresponding to the injection groove 48. The middle part of the worktable 1 is provided with a through hole 2 to avoid the rotation of the first moving mold 9 and the second moving mold 10. The first power assembly 12 is also provided with a spraying assembly 11 for spraying release agent onto the first molding mold 15 and the second molding mold 23.

[0030] The first power assembly 12 includes a first cylinder 5 and a push plate 7. A mounting plate 6 is provided on the worktable 1. The first cylinder 5 is fixed on the mounting plate 6, and the piston of the first cylinder 5 passes through the mounting plate 6 and is fixedly connected to the push plate 7. A protrusion 35 is provided on the push plate 7. A limit sleeve 21 is installed on the sliding seat 17, and a limit rod 32 is installed on the push plate 7. The limit rod 32 has a stepped shaft structure, and the larger diameter end is slidably disposed in the limit sleeve 21. When the first cylinder 5 drives the push plate 7 to slide away from the first moving mold 9 and the second moving mold 10 to realize mold opening, the limit rod 32 first moves away from the limit sleeve 21. 1. Sliding inside, at this time the first mold base 13 and the second mold base 24 remain stationary until the limit rod 32 drives the limit sleeve 21 and the sliding seat 17 to slide, the first mold base 13 and the second mold base 24 begin to move. This can increase the distance between the push plate 7 and the first moving mold 9 and the second moving mold 10, thereby reserving space for the rotation of the first moving mold 9 and the second moving mold 10. When the first cylinder 5 drives the push plate 7 to slide in the opposite direction, it will first reduce the distance between the push plate 7 and the first moving mold 9 and the second moving mold 10, and then drive the first moving mold 9 and the second moving mold 10 to move closer to each other, and finally achieve mold closing.

[0031] The spraying assembly 11 includes a connecting pipe 38, a feed pipe 36, a nozzle 34, and a transmission component. A mounting block 37 is provided on the push plate 7 for mounting the feed pipe 36 and the connecting pipe 38. The connecting pipe 38 is horizontal, and both ends of the connecting pipe 38 are rotatably connected to the mounting block 37. Multiple nozzles 34 are provided and installed on the connecting pipe 38 at equal intervals. The feed pipe 36 is rotatably mounted on the connecting pipe 38. The transmission component is mounted on the push plate 7 and is used to drive the connecting pipe 38 to reciprocate and rotate at a preset angle. The transmission component includes a second cylinder 39 and a rack 40. A groove 33 is provided on the push plate 7, and the rack 40 slides within the groove 33. The second cylinder 39 is mounted on the push plate 7. Furthermore, the piston of the second cylinder 39 is fixedly connected to the rack 40, and a transmission gear 41 is installed on the connecting pipe 38. The transmission gear 41 meshes with the rack 40. One end of the feed pipe 36 is connected to the delivery pump through a hose. The external delivery pump delivers the liquid release agent to the nozzle 34 through the feed pipe 36 and the connecting pipe 38, and then sprays it out from the nozzle 34. The second cylinder 39 drives the rack 40 to slide vertically back and forth, so that the transmission gear 41 drives the connecting pipe 38 to rotate at a certain angle. This can change the spraying angle of the nozzle 34, so that the release agent can be sprayed on all the molding surfaces of the mold, so that the shoe sole can be successfully demolded and unloaded after injection molding.

[0032] The second power assembly 8 includes a first motor 18 and a drive gear 22. Both sides of the first mold base 13 and the second mold base 24 are provided with drive shafts 20, which are rotatably connected to the sliding seat 17. One of the drive shafts 20 is provided with a driven gear 19. The first motor 18 is mounted on the sliding seat 17, and the output shaft of the first motor 18 is fixedly connected to the drive gear 22. The drive gear 22 meshes with the driven gear 19. The worktable 1 is provided with a slide rail 4 that cooperates with the sliding seat 17. When the first motor 18 drives the drive gear 22 to rotate, it drives the first moving mold 9 and the second moving mold 10 to rotate by meshing with the driven gear 19. By controlling the rotation angle of the drive gear 22 and its transmission ratio with the driven gear 19, the first moving mold 9 and the second moving mold 10 can be rotated 180°.

[0033] The sliding seat 17 is provided with a first limiting bolt 29, a first spring 31, and a nut 30 at the position corresponding to the limiting sleeve 21. The first limiting bolt 29 passes through the sliding seat 17 and is connected to the nut 30. The first spring 31 is sleeved on the outside of the first limiting bolt 29 and applies a force close to the limiting rod 32 to the first limiting bolt 29. The limiting assembly includes a second limiting bolt 25 and a second spring 27. One end of the second limiting bolt 25 passes through the first forming mold 15 and the second forming mold 23 and is fixedly connected to the first mold base 13 and the second mold base 24, respectively. Both the first forming mold 15 and the second forming mold 23 are provided with countersunk holes for installing the second spring 27. The second spring 27 is sleeved on the outside of the second limiting bolt 25 and applies a force against the first mold base 13 and the second mold base 24 to the first forming mold 15 and the second forming mold 23. Both the first forming mold 15 and the second forming mold 23 are provided with forming grooves 28 for forming the shoe sole. With the first molding die 15 and the second molding die 23 respectively abutting against the first mold base 13 and the second mold base 24, the height of the push rod 14 protruding from the molding groove 28 is equal to the height of the first pressing rod 16 and the second pressing rod 26 protruding from the first molding die 15 and the second molding die 23. The limiting rod 32 slides in the limiting sleeve 21 and abuts against the first limiting bolt 29. When the sliding seat 17 cannot slide, the limiting rod 32 can continue to push the first limiting bolt 29 to move. This allows the protrusion 35 on the push plate 7 to apply a pushing force to the first pressing rod 16 and the second pressing rod 26, thereby closing one set of the first molding die 15 and the second molding die 23 and compressing the second spring 27 to store force. When the mold is opened, the elastic force of the second spring 27 on the first molding die 15 and the second molding die 23 causes the push rod 14 to move relative to the first molding die 15 and the second molding die, thus pushing the molded sole out of the molding groove 28 to achieve demolding and unloading smoothly.

[0034] Injection molding assembly 3 includes an injection barrel 47, a hopper 42, a second motor 44, a screw 45, and a heating seat 46. A fixing block for mounting the screw 45 is provided on the worktable 1. The output shaft of the second motor 44 is fixedly connected to the screw 45. The heating seat 46 is slidably mounted on the worktable 1. The injection barrel 47 is mounted on the heating seat 46. The hopper 42 is mounted on the injection barrel 47 and has a feeding pipe 43. The screw 45 is threadedly connected to the heating seat 46. After the first molding mold 15 and the second molding mold 23 are closed, one end of the injection barrel 47 aligns with the injection groove 48. Then, the second motor 44 drives the screw 45 to rotate, causing the heating seat 46 to drive the injection barrel 47 to slide on the worktable 1, allowing the injection barrel 47 to engage with the injection groove 48. This enables the molten EVA material to be smoothly injected into the molding groove 28, thus successfully achieving the injection molding of the EVA shoe sole.

[0035] Working principle: During mold closing, the first forming mold 15 and the second forming mold 23 are not in contact. Then, the first cylinder 5 drives the push plate 7 to slide, and one end of the limiting rod 32 slides within the limiting sleeve 21. At this time, the push plate 7 maintains relative sliding with the first moving mold 9 and the second moving mold 10. When the limiting rod 32 contacts the first limiting bolt 29, the protrusion 35 also contacts the first pressing rod 16 and the second pressing rod 26. Subsequently, the push plate 7 moves synchronously with the first moving mold 9 and the second moving mold 10. When the sliding seat 17 cannot slide on the slide rail 4, the first forming mold 15 and the second forming mold 23 that are close to each other are still not closed. At this time, one end of the corresponding ejector rod 14 is in the state of protruding from the forming groove 28. Then, the first cylinder 5 drives the push plate 7 to continue moving, so that the limiting rod 32 drives the first limiting bolt 29 to compress the first spring 31, while the protrusion... The first pressing rod 16 and the second pressing rod 26 continue to move, causing the first molding mold 15 and the second molding mold 23, which are close to each other, to continue to move relative to the first mold base 13 and the second mold base 24, thereby achieving mold closing. This makes one end of the ejector rod 14 in the first molding mold 15 and the second molding mold 23 flush with the bottom of the molding groove 28. Then, the second motor 44 drives the screw 45 to rotate, so that one end of the injection barrel 47 engages with the injection groove 48 and injects the molten EVA material into the molding groove 28. After it is kept warm, foamed, and cooled, the mold is opened. During injection molding, the second cylinder 39 drives the rack 40 to slide, so that the transmission gear 41 drives the connecting pipe 38 to rotate at a certain angle, and the nozzle 34 sprays the liquid release agent evenly onto the surface of the molding groove 28 of the other set of first molding mold 15 and second molding mold 23.

[0036] When the mold is opened, the first cylinder 5 drives the push plate 7 to move away from the first moving mold 9 and the second moving mold 10. The limiting rod 32 slides in the limiting sleeve 21. The sliding seat 17 remains stationary under the force of the first spring 31. The first molding mold 15 and the second molding mold 23 used for molding move relative to the first mold base 13 and the second mold base 24 under the action of the second spring 27. In this way, the EVA shoe sole after molding can be pushed out of the molding groove 28 by the ejector rod 14. When the push plate 7 leaves a sufficient safety distance between the first moving mold 9 and the second moving mold 10, the limiting rod 32 abuts against the limiting sleeve 21, so that the first cylinder 5 can drive the first moving mold 9 and the second moving mold 10 to move away from each other until the distance between the first moving mold 9 and the second moving mold 10 reaches the maximum. Then, the second power component 8 drives the first moving mold 9 and the second moving mold 10 to rotate 180°. In this way, the positions of the two first molding molds 15 and the two second molding molds 23 can be changed. Repeating the previous action can perform the next injection molding.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An EVA shoe sole injection molding apparatus, comprising a worktable, a first moving mold, a second moving mold, and an injection molding assembly, characterized in that, Both sides of the first and second moving molds are provided with sliding seats, which are slidably mounted on a worktable. A first power assembly for driving the sliding seats to slide horizontally is provided on the worktable. A second power assembly for driving the first and second moving molds to rotate is provided on the sliding seats. The first moving mold includes a first mold base and two first forming molds, which are slidably mounted on both sides of the first mold base. The second moving mold includes a second mold base and two second forming molds, which are slidably mounted on the second mold base. Both the first and second mold bases are provided with limiting components to restrict the sliding distance of the first and second forming molds. A first pressing rod is provided on the side of each of the two first forming molds that is close to each other, and a second pressing rod is provided on the side of each of the two second forming molds that is close to each other, connected to one of the first and second forming molds. The first and second pressing rods have one end that passes through another first and second molding mold. The limiting component applies a force to the first and second molding molds respectively, causing one end of the first and second pressing rods to protrude from the surfaces of the first and second molding molds. The first power component is provided with a protrusion for applying a pushing force to the first and second pressing rods. The first and second molding molds are each equipped with a push rod that passes through the first and second molding molds. The first and second molding molds are each provided with an injection groove. The injection component is installed on one side of the worktable corresponding to the injection groove. The middle of the worktable is provided with a through hole to avoid the rotation of the first and second moving molds. The first power component is also provided with a spraying component for spraying a release agent onto the first and second molding molds.

2. The EVA shoe sole injection molding device according to claim 1, characterized in that, The first power assembly includes a first cylinder and a push plate. A mounting plate is provided on the worktable. The first cylinder is fixed on the mounting plate, and the piston of the first cylinder passes through the mounting plate and is fixedly connected to the push plate. The protrusion is provided on the push plate. A limit sleeve is installed on the sliding seat. A limit rod is installed on the push plate. The limit rod has a stepped shaft structure, and the end with the larger diameter is slidably disposed in the limit sleeve.

3. The EVA shoe sole injection molding device according to claim 2, characterized in that, The spraying assembly includes a connecting pipe, a feed pipe, a nozzle, and a transmission component. The push plate is provided with a mounting block for mounting the feed pipe and the connecting pipe. The connecting pipe is horizontal, and both ends of the connecting pipe are rotatably connected to the mounting block. Multiple nozzles are provided and are installed on the connecting pipe at equal intervals. The feed pipe is rotatably mounted with the connecting pipe. The transmission component is mounted on the push plate and is used to drive the connecting pipe to reciprocate and rotate at a preset angle.

4. The EVA shoe sole injection molding device according to claim 3, characterized in that, The transmission component includes a second cylinder and a rack. A groove is provided on the push plate, and the rack is slidably disposed in the groove. The second cylinder is mounted on the push plate, and the piston of the second cylinder is fixedly connected to the rack. A transmission gear is installed on the connecting pipe, and the transmission gear meshes with the rack.

5. The EVA shoe sole injection molding device according to claim 1, characterized in that, The second power assembly includes a first motor and a drive gear. Both sides of the first mold base and the second mold base are provided with drive shafts. The drive shafts are rotatably connected to the sliding base. One of the drive shafts is provided with a driven gear. The first motor is mounted on the sliding base, and the output shaft of the first motor is fixedly connected to the drive gear. The drive gear meshes with the driven gear. The worktable is provided with a slide rail that cooperates with the sliding base.

6. The EVA shoe sole injection molding device according to claim 2, characterized in that, The sliding seat is provided with a first limiting bolt, a first spring, and a nut at the position corresponding to the limiting sleeve. The first limiting bolt passes through the sliding seat and is connected to the nut. The first spring is sleeved on the outside of the first limiting bolt and applies a force close to the limiting rod to the first limiting bolt. The limiting assembly includes a second limiting bolt and a second spring. One end of the second limiting bolt passes through the first forming mold and the second forming mold and is fixedly connected to the first mold base and the second mold base, respectively. Both the first forming mold and the second forming mold are provided with countersunk holes for installing the second spring. The second spring is sleeved on the outside of the second limiting bolt and applies a force against the first mold base and the second mold base to the first forming mold and the second forming mold.

7. The EVA shoe sole injection molding device according to claim 1, characterized in that, Both the first molding die and the second molding die are provided with molding grooves for molding shoe soles. When the first molding die and the second molding die are respectively in contact with the first mold base and the second mold base, the height of the push rod protruding from the molding groove is equal to the height of the first pressing rod and the second pressing rod protruding from the first molding die and the second molding die.

8. The EVA shoe sole injection molding apparatus according to claim 1, characterized in that, The injection molding assembly includes an injection barrel, a hopper, a second motor, a screw, and a heating base. A fixing block for mounting the screw is provided on the worktable. The output shaft of the second motor is fixedly connected to the screw. The heating base is slidably mounted on the worktable. The injection barrel is mounted on the heating base. The hopper is mounted on the injection barrel and is provided with a feeding pipe. The screw is threadedly connected to the heating base.

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