Automatic demolding structure for plastic product

Abstract

The invention relates to the technical field of mold demolding, and discloses a plastic product automatic demolding structure which comprises a base, second guide sleeves are fixedly connected to the left side and the right side of the top of the base, a demolding mechanism is arranged at the tops of the second guide sleeves and comprises hollow pipes and chains, the hollow pipes are fixedly connected to the inner sides of the second guide sleeves, and the chains are fixedly connected to the inner sides of the second guide sleeves. A tooth socket is slidably connected to the outer side of the hollow pipe, a tooth guide sleeve is in threaded connection to the outer side of the tooth socket, a plurality of small sliding blocks are fixedly connected to the top of the hollow pipe at equal intervals, and a pushing assembly is arranged at the top of the hollow pipe. The oil motor drives the main shaft to rotate through the transmission effect of the chain, the tooth sleeve rotates and moves downwards along the lead of the tooth guide sleeve through the transmission effect of the transmission gear and the driven gear, the small sliding block is driven to slide, the demolding process of a plastic product is completed, and the demolding device can adapt to demolding work of small materials.

Description

Technical Field

[0001] This invention relates to the field of mold demolding technology, and in particular to an automatic demolding structure for plastic products. Background Art

[0002] Plastic cup lids are accessories made of food-grade plastic and used to seal cups, prevent liquid leakage, or maintain beverage hygiene. They are mainly manufactured using injection molding, which is suitable for large-scale mass production and ensures product consistency and stability.

[0003] In the early stages of plastic product manufacturing, manual demolding was often relied upon after injection molding. However, as market demand for plastic products surged, manual demolding became extremely inefficient and difficult to match the rapid cycle of injection molding machines, thus limiting capacity expansion. At this point, an automatic demolding structure for plastic products was needed.

[0004] Currently, most automatic demolding structures for plastic products on the market use ejector pins to directly apply pushing force, overcoming the adhesion and clamping forces between the plastic part and the mold surface, and ejecting the plastic part from the core. However, this structure is extremely difficult to handle plastic products with undercuts of 0.5mm or more, and where the space is too confined to use angled ejector slides for demolding. Related technologies use slides that translate and extend in space, driven by the compression kinetic energy of rectangular springs and simple guides on the slides to assist in movement and positioning, enabling plastic products with undercuts of 0.5mm or more to automatically detach from the mold. This mechanical structure is simple, stable, and has a small mold space usage range, which can effectively solve the problem of plastic products being unable to detach from the mold in confined spaces. However, the above structure requires high machining precision and has a relatively complex processing technology. When the rectangular spring fails, it will cause damage to the plastic product, requiring regular replacement of the rectangular spring, which reduces the practicality of the device and cannot meet the needs of users. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic demolding structure for plastic products, which solves the problems of existing automatic demolding structures for plastic products causing tearing and requiring frequent maintenance.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An automatic demolding structure for plastic products includes a base, with guide sleeves fixedly connected to the top left and right sides of the base. A demolding mechanism is provided on the top of the guide sleeves for facilitating demolding of the plastic product. An ejection mechanism is provided on the inner side of the base for ejecting the plastic product. An adjustment mechanism is provided at the bottom of the base for adjusting the transmission chain. The demolding mechanism includes a hollow tube and a chain. The hollow tube is fixedly connected to the inner side of the guide sleeve two. A toothed sleeve is slidably connected to the outer side of the hollow tube. A toothed guide sleeve is threadedly connected to the outer side of the toothed sleeve. Multiple small sliders are fixedly connected at equal intervals to the top of the hollow tube. A pushing component is provided at the top of the hollow tube. A main shaft is fixedly connected to the top of the base. A transmission gear is fixedly connected to the top of the main shaft. Driven gears are fixedly connected to the bottom outer sides of both toothed sleeves. Both driven gears are meshed with the transmission gear. The bottom end of the main shaft passes through the base. A hydraulic motor is provided on the bottom right side of the base. Sprockets are fixedly connected to the outer side of the main shaft and the output end of the hydraulic motor. The two sprockets are connected by the chain drive.

[0007] Through the above technical solution, the hydraulic motor drives the main shaft to rotate through the transmission of the chain and sprocket. The main shaft, through the transmission gear and driven gear, drives the toothed sleeve to rotate, thereby moving the toothed sleeve up and down. This enables the contraction and expansion of multiple small sliders, realizing the demolding of plastic products. It can adapt to the demolding of smaller materials, prevent the plastic parts from being damaged, and meet the needs of users.

[0008] Preferably, the ejection mechanism includes transmission rods, two transmission rods are rotatably connected to the left and right sides of the interior of the base, the front ends of the two transmission rods are rotatably connected to a third bevel gear, the top left and right sides of the interior of the base are rotatably connected to a rotating rod, the bottom of the rotating rod is fixedly connected to a fourth bevel gear, the fourth bevel gear meshes with the third bevel gear, the top end of the rotating rod passes through the base and the hollow tube in sequence and is threadedly connected to a top block, and a drive assembly is provided on the rear side of the interior of the base.

[0009] The above technical solution enables the rotating rod to rotate with the transmission rod, thereby pushing the ejector block upward and ejecting the plastic product upward, realizing automatic ejection of the plastic product, making demolding more convenient and shortening the working cycle of the mold.

[0010] Preferably, the adjustment mechanism includes a bracket, which is fixedly connected to the bottom right side of the base. The bottom front side of the bracket is fixedly connected to an oil motor. A U-shaped plate is fixedly connected to the top front side of the bracket. A bidirectional threaded rod is rotatably connected to the inner side of the U-shaped plate. The right end of the bidirectional threaded rod passes through the U-shaped plate. Movable blocks are threaded to both the left and right sides of the outer wall of the bidirectional threaded rod. A connecting rod is rotatably connected to the front side of the movable block. A collar is rotatably connected to the front side of the connecting rod. A push wheel is rotatably connected to the bottom of the collar. The rear side of the push wheel is in contact with a chain.

[0011] Through the above technical solution, the bidirectional threaded rod rotates to drive the movable block to move, and through the connecting rod drives the collar to move, which in turn drives the push wheel to move, squeezing the chain and thus adjusting the chain tension.

[0012] Preferably, the pushing assembly includes guide rods, and guide rods are fixedly connected to the top periphery of the hollow tube, with springs provided on the outer sides of the multiple guide rods.

[0013] Through the above technical solution, the spring can push the small slider to move, so that when the braces move downward, the small slider can expand in all directions.

[0014] Preferably, the drive assembly includes a motor, which is fixedly connected to the bottom rear side of the base. The output end of the motor passes through the base and is fixedly connected to a first bevel gear. The rear ends of the two transmission rods are fixedly connected to second bevel gears, and the rear ends of the two second bevel gears are meshed with the first bevel gear.

[0015] Through the above technical solution, the motor can drive the transmission rod to rotate by the meshing transmission of the first bevel gear and the second bevel gear.

[0016] Preferably, the demolding mechanism further includes a guide sleeve, which is fixedly connected to the upper middle part of the outer side of the dental brace, and the top of the guide sleeve has multiple holes at equal intervals.

[0017] Through the above technical solution, the guide sleeve can be fixed through the hole, allowing the dental brace to move accurately.

[0018] Preferably, the demolding mechanism further includes a rotating shaft, which is rotatably connected to the middle of the outer side of the dental brace, and the top size of the dental brace matches the size of the small slider.

[0019] Through the above technical solution, the rotating shaft can support the braces, and the size of the top of the braces matches the size of the small slider, so that the small slider can fit tightly against the top of the braces.

[0020] Preferably, the ejection mechanism further includes a second rotating shaft, which is rotatably connected to the lower outer side of the rotating rod, and the top of the second rotating shaft is fixedly connected to the second guide sleeve.

[0021] Through the above technical solution, the second rotating shaft can support and guide the rotating rod without hindering its rotation.

[0022] Preferably, the ejection mechanism further includes guide bars, two of which are fixedly connected to the top left and right sides of the hollow tube, and the outer side of the guide bars is slidably connected to the top block.

[0023] Through the above technical solution, the top block is limited by the guide bar when it moves, so that the top block can move up and down accurately when the rotating rod rotates.

[0024] Preferably, the adjustment mechanism further includes a guide rail, which is fixedly connected to the bottom right side of the base, and the outer side of the guide rail is slidably connected to a collar.

[0025] With the above technical solution, the collar can slide on the outside of the guide rail, so that the collar will not deflect when it moves.

[0026] In summary, the present invention has at least one of the following beneficial technical effects: 1. The oil motor of this invention drives the main shaft to rotate through the transmission action of the chain, and through the transmission action of the transmission gear and the driven gear, the toothed sleeve rotates along the lead of the toothed guide sleeve and moves downward. At this time, the top of the toothed sleeve and the small slider gradually develop a gap from a tight fit, causing the small slider to slide, thereby completing the demolding process of the plastic product. It can adapt to the demolding work of smaller materials, prevent the plastic parts from being scratched, and meet the needs of users.

[0027] 2. This invention drives the third bevel gear to rotate via a transmission rod, and through the meshing transmission between the fourth bevel gear and the third bevel gear, it further drives the rotating rod to rotate. The rotation of the rotating rod pushes the ejector block upward, ejecting the plastic product that has been injected into the inner side of the small slider, thus realizing the automatic ejection of the plastic product, making demolding more convenient and shortening the working cycle of the mold.

[0028] 3. This invention uses a rotating bidirectional threaded rod to cause a movable block to move inside a U-shaped plate. The movable block pushes a collar to slide on a guide rail via a connecting rod, thereby driving a push wheel to move. This causes the push wheel to squeeze or disengage from the chain, causing the chain to tighten or loosen. This allows for adjustment of the chain tension, improving the convenience of the device. Attached Figure Description

[0029] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a partial structural cross-sectional view of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the image; Figure 5 This is a partial structural breakdown diagram of the present invention; Figure 6 This is a partial structural cross-sectional view of the ejection mechanism of the present invention; Figure 7 This is a partial structural diagram of the present invention; Figure 8 This is a partial structural cross-sectional view of the adjustment mechanism of the present invention.

[0030] The components include: 1. Base; 2. Demolding mechanism; 21. Hollow tube; 22. Tooth sleeve; 23. Tooth guide sleeve; 24. Small slider; 25. Pushing assembly; 251. Guide rod; 252. Spring; 26. Main shaft; 27. Transmission gear; 28. Driven gear; 29. ​​Hydraulic motor; 210. Sprocket; 211. Chain; 212. Guide sleeve one; 213. Hole; 214. Rotating shaft one; 3. Ejection mechanism; 31. Transmission rod; 3 2. Third bevel gear; 33. Rotating rod; 34. Fourth bevel gear; 35. Top block; 36. Drive assembly; 361. Motor; 362. First bevel gear; 363. Second bevel gear; 37. Guide bar; 38. Rotating shaft II; 4. Adjustment mechanism; 41. Bracket; 42. U-shaped plate; 43. Bidirectional threaded rod; 44. Movable block; 45. Connecting rod; 46. Collar; 47. Push wheel; 48. Guide rail; 5. Guide sleeve II. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 8 The present invention will be further described in detail below.

[0032] This invention provides an automatic demolding structure for plastic products, including a base 1, with guide sleeves 5 fixedly connected to the top left and right sides of the base 1, a demolding mechanism 2 provided on the top of the guide sleeves 5, the demolding mechanism 2 being used to facilitate demolding of the plastic products, an ejection mechanism 3 provided on the inner side of the base 1, the ejection mechanism 3 being used to eject the plastic products, and an adjustment mechanism 4 provided on the bottom of the base 1, the adjustment mechanism 4 being used to adjust the transmission chain; The demolding mechanism 2 includes a hollow tube 21 and a chain 211. The hollow tube 21 is fixedly connected to the inner side of the guide sleeve 2 5. A toothed sleeve 22 is slidably connected to the outer side of the hollow tube 21. A toothed guide sleeve 23 is threadedly connected to the outer side of the toothed sleeve 22. When the toothed sleeve 22 rotates, it can move along the stroke direction of the toothed guide sleeve 23. Multiple small sliders 24 are fixedly connected at equal intervals to the top of the hollow tube 21. The small sliders 24 can slide on the top of the hollow tube 21. A pushing component 25 is provided on the top of the hollow tube 21. A main shaft 26 is fixedly connected to the top of the base 1. A transmission gear 27 is fixedly connected to the top of the main shaft 26. The main shaft 26 drives the transmission gear 27 to rotate. Driven gears 28 are fixedly connected to the bottom outer sides of both toothed sleeves 22. Both driven gears 28 are meshed with transmission gears 27. Transmission gears 27 can drive the toothed sleeve 22 to rotate through driven gears 28. The bottom end of the main shaft 26 passes through the base 1. A hydraulic motor 29 is provided on the bottom right side of the base 1. Sprockets 210 are fixedly connected to the outer side of the main shaft 26 and the output end of the hydraulic motor 29. The two sprockets 210 are connected by a chain 211. The hydraulic motor 29 can drive the main shaft 26 to rotate through the transmission action of the sprockets 210 and the chain 211. The push assembly 25 includes guide rods 251. Guide rods 251 are fixedly connected to the top of the outer side of the hollow tube 21. Springs 252 are provided on the outer side of the multiple guide rods 251. Springs 252 can push the small slider 24 to move. Specifically, when the mold is opened after injection molding, the hydraulic motor 29 drives the main shaft 26 to rotate stably through the transmission action of the sprocket 210 and chain 211. When the main shaft 26 starts to rotate, through the transmission gear 27 and driven gear 28, it drives the toothed sleeve 22 to rotate precisely along the preset lead of the toothed guide sleeve 23 and move downwards. During this process, the originally tight fit between the top of the toothed sleeve 22 and the small slider 24 gradually creates a gap. The spring 252 then pushes the small slider 24 to move outwards in space, allowing it to smoothly disengage from the undercut structure of the product. This completes the demolding of the plastic product. During the mold closing stage, the hydraulic motor 29 reverses, and through the transmission of the chain 211 and sprocket 210, it drives the main shaft 26 to rotate in the opposite direction, driving the toothed sleeve 22 to rotate in the opposite direction according to the lead of the toothed guide sleeve 23 and move upward. The gap between the toothed sleeve 22 and the small slider 24 will gradually decrease until it is completely closed. As the inclined surface inside the toothed sleeve 22 continuously squeezes the small slider 24, the small slider 24 moves inward under the action of squeezing, and finally completes the reset work. It can adapt to the demolding of smaller materials, prevent the plastic parts from being pulled, and meet the needs of users.

[0033] The ejection mechanism 3 includes two transmission rods 31, which are rotatably connected to the left and right sides of the interior of the base 1, respectively. A third bevel gear 32 is rotatably connected to the front end of each transmission rod 31, causing the transmission rods 31 to drive the third bevel gear 32 to rotate. Rotating rods 33 are rotatably connected to the left and right sides of the top of the interior of the base 1. A fourth bevel gear 34 is fixedly connected to the bottom of the rotating rod 33, meshing with the third bevel gear 32. When the third bevel gear 32 rotates, the fourth bevel gear 34 drives the rotating rod 33 to rotate. The top of the rotating rod 33 passes through the base 1 and the hollow tube 21 and is threadedly connected to a top block 35. Rotation of the rotating rod 33 causes the top block 35 to move upwards. A drive assembly 36 is provided on the rear side of the interior of the base 1. The drive assembly 36 includes a motor 361, which is fixedly connected to the bottom rear side of the base 1. The output end of the motor 361 passes through the base 1 and is fixedly connected to a first bevel gear 362. The motor 361 drives the first bevel gear 362 to rotate. The rear ends of the two transmission rods 31 are fixedly connected to second bevel gears 363. The rear ends of the two second bevel gears 363 are meshed with the first bevel gear 362. When the first bevel gear 362 rotates, the second bevel gears 363 drive the transmission rods 31 to rotate. The ejection mechanism 3 also includes guide bars 37. The two guide bars 37 are fixedly connected to the top left and right sides of the hollow tube 21, respectively. The outer side of the guide bar 37 is slidably connected to the top block 35. The top block 35 can only slide on the outer side of the guide bar 37. Specifically, during the demolding process, the motor 361 starts and drives the first bevel gear 362 to rotate. Since the second bevel gear 363 meshes with the first bevel gear 362, the first bevel gear 362 drives the second bevel gear 363 to rotate, which in turn drives the transmission rod 31 to rotate. Through the transmission action of the third bevel gear 32 and the fourth bevel gear 34, the transmission rod 31 can further drive the rotating rod 33 to rotate. Since the top block 35 is limited by the guide strip 37, when the rotating rod 33 rotates, the top block 35 will move upward accordingly, ejecting the plastic product that has been injected into the inner side of the small slider 24, thereby completing the demolding process. Demolding is more convenient and the working cycle of the mold is shortened.

[0034] The adjustment mechanism 4 includes a bracket 41, which is fixedly connected to the bottom right side of the base 1. The bottom front side of the bracket 41 is fixedly connected to the oil motor 29. A U-shaped plate 42 is fixedly connected to the top front side of the bracket 41. A bidirectional threaded rod 43 is rotatably connected to the inner side of the U-shaped plate 42. The right end of the bidirectional threaded rod 43 passes through the U-shaped plate 42. Movable blocks 44 are threadedly connected to the left and right sides of the outer wall of the bidirectional threaded rod 43. When the bidirectional threaded rod 43 rotates, it will push the movable blocks 44 to move. A connecting rod 45 is rotatably connected to the front side of the movable block 44. A collar 46 is rotatably connected to the front side of the connecting rod 45. The movable block 44 can push the collar 46 to move through the connecting rod 45. A push wheel 47 is rotatably connected to the bottom of the collar 46. The collar 46 will drive the push wheel 47 to move. The rear side of the push wheel 47 is in contact with the chain 211. When the push wheel 47 moves, it will squeeze the chain 211 to move. The adjustment mechanism 4 also includes a guide rail 48. The guide rail 48 is fixedly connected to the bottom right side of the base 1. The outer side of the guide rail 48 is slidably connected to the collar 46. The collar 46 can slide on the outer side of the guide rail 48. Specifically, during the use of this device, when the chain 211 becomes loose and needs adjustment, the bidirectional threaded rod 43 is rotated. As the bidirectional threaded rod 43 rotates, it pushes the connected movable block 44 to move. When the movable block 44 moves, it can push the collar 46 to move outside the guide rail 48 through the connecting rod 45. The movement of the collar 46 will drive the push wheel 47 to move accordingly, applying pressure to the chain 211, thereby precisely adjusting the tension of the chain 211 and restoring it to its optimal working state. This ensures the normal operation and stability of the entire mechanical system and improves the convenience of the device.

[0035] The demolding mechanism 2 also includes a guide sleeve 212, which is fixedly connected to the upper middle part of the outer side of the dental sleeve 22. The top of the guide sleeve 212 is provided with multiple holes 213 at equal intervals, which facilitate the fixing of the guide sleeve 212. The demolding mechanism 2 also includes a rotating shaft 214, which is rotatably connected to the middle part of the outer side of the dental sleeve 22. The size of the top of the dental sleeve 22 matches the size of the small slider 24. Specifically, the guide sleeve 212 can be fixed through the hole 213 so that it can provide a guiding function. The rotating shaft 214 is rotatably connected to the middle of the outer side of the dental brace 22 so that the rotating shaft 214 can provide guiding support for the dental brace 22. The top size of the dental brace 22 matches the size of the small slider 24 so that there will be no large gap between the dental brace 22 and the small slider 24.

[0036] The ejection mechanism 3 also includes a second rotating shaft 38, which is rotatably connected to the lower middle part of the outer side of the rotating rod 33. The top of the second rotating shaft 38 is fixedly connected to the second guide sleeve 5. The rotating rod 33 can be fixed through the second rotating shaft 38. Specifically, the rotating rod 33 can be fixed by the rotating shaft 38 without hindering the rotation of the rotating rod 33.

[0037] Working principle: When the mold is opened after injection, the hydraulic motor 29 drives the main shaft 26 to rotate through the transmission action of the sprocket 210 and the chain 211. When the main shaft 26 rotates, it drives the tooth sleeve 22 to rotate along the lead of the tooth guide sleeve 23 and move downward through the transmission action of the transmission gear 27 and the driven gear 28. At this time, the top of the tooth sleeve 22 and the small slider 24 gradually create a gap from the tight fit, giving the small slider 24 the movement space to disengage from the undercut. The spring 252 will then push the small slider 24 to move outward in space to disengage from the product undercut, thereby completing the demolding process of the plastic product. When the mold is closed, the hydraulic motor 29 reverses and drives the main shaft 26 to rotate through the chain 211 and the sprocket 210, thereby driving the tooth sleeve 22 to rotate along the lead of the tooth guide sleeve 23 and move upward. At this time, the gap between the tooth sleeve 22 and the small slider 24 decreases until it closes. The inclined surface inside the tooth sleeve 22 squeezes the small slider 24, and the small slider 24 moves inward under the squeeze to complete the reset work. During the demolding process, the motor 361 drives the first bevel gear 362 to rotate. Since the second bevel gear 363 meshes with the first bevel gear 362, the second bevel gear 363 will drive the transmission rod 31 to rotate. The transmission rod 31 can further drive the rotating rod 33 to rotate through the meshing of the third bevel gear 32 and the fourth bevel gear 34. Since the top block 35 is limited by the guide bar 37, the top block 35 will move upward when the rotating rod 33 rotates, thereby ejecting the plastic product that has been injected into the inner side of the small slider 24. Finally, during the use of this device, when the chain 211 becomes loose and needs adjustment, the double-threaded rod 43 is rotated. The rotation of the double-threaded rod 43 will push the movable block 44 to move. When the movable block 44 moves, the connecting rod 45 can push the collar 46 to move outside the guide rail 48. The movement of the collar 46 will drive the push wheel 47 to move, so that the push wheel 47 will squeeze the chain 211, thereby adjusting the tension of the chain 211.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic demolding structure for plastic products, comprising a base (1), characterized in that, The top left and right sides of the base (1) are fixedly connected with guide sleeves (5). The top of the guide sleeves (5) is provided with a demolding mechanism (2). The demolding mechanism (2) is used to facilitate demolding of plastic products. The inner side of the base (1) is provided with an ejection mechanism (3). The ejection mechanism (3) is used to eject plastic products. The bottom of the base (1) is provided with an adjustment mechanism (4). The adjustment mechanism (4) is used to adjust the transmission chain. The demolding mechanism (2) includes a hollow tube (21) and a chain (211). The hollow tube (21) is fixedly connected to the inner side of the guide sleeve (5). A toothed sleeve (22) is slidably connected to the outer side of the hollow tube (21). A toothed guide sleeve (23) is threadedly connected to the outer side of the toothed sleeve (22). A plurality of small sliders (24) are fixedly connected at equal intervals to the top of the hollow tube (21). A pushing assembly (25) is provided on the top of the hollow tube (21). A main shaft (26) is fixedly connected to the top of the base (1). 6) The top is fixedly connected to a transmission gear (27), and the bottom of the outer side of the two toothed sleeves (22) is fixedly connected to a driven gear (28). The two driven gears (28) are meshed with the transmission gear (27). The bottom end of the main shaft (26) passes through the base (1). The bottom right side of the base (1) is provided with an oil motor (29). The outer side of the main shaft (26) and the output end of the oil motor (29) are fixedly connected to sprockets (210). The two sprockets (210) are connected by the chain (211).

2. The automatic demolding structure for plastic products according to claim 1, characterized in that, The ejection mechanism (3) includes a transmission rod (31), two transmission rods (31) are rotatably connected to the left and right sides of the inside of the base (1), and the front ends of the two transmission rods (31) are rotatably connected to a third bevel gear (32). The top left and right sides of the inside of the base (1) are rotatably connected to a rotating rod (33). The bottom of the rotating rod (33) is fixedly connected to a fourth bevel gear (34). The fourth bevel gear (34) meshes with the third bevel gear (32). The top end of the rotating rod (33) passes through the base (1) and the hollow tube (21) in sequence and is threadedly connected to a top block (35). The rear side of the inside of the base (1) is provided with a drive assembly (36).

3. The automatic demolding structure for plastic products according to claim 1, characterized in that, The adjustment mechanism (4) includes a bracket (41), which is fixedly connected to the bottom right side of the base (1). The bottom front side of the bracket (41) is fixedly connected to the oil motor (29). A U-shaped plate (42) is fixedly connected to the top front side of the bracket (41). A bidirectional threaded rod (43) is rotatably connected to the inner side of the U-shaped plate (42). The right end of the bidirectional threaded rod (43) passes through the U-shaped plate (42). Movable blocks (44) are threadedly connected to the left and right sides of the outer wall of the bidirectional threaded rod (43). A connecting rod (45) is rotatably connected to the front side of the movable block (44). A collar (46) is rotatably connected to the front side of the connecting rod (45). A push wheel (47) is rotatably connected to the bottom of the collar (46). The rear side of the push wheel (47) is in contact with the chain (211).

4. The automatic demolding structure for plastic products according to claim 1, characterized in that, The pushing assembly (25) includes guide rods (251), and guide rods (251) are fixedly connected to the top of the outer side of the hollow tube (21). Springs (252) are provided on the outer side of the multiple guide rods (251).

5. The automatic demolding structure for plastic products according to claim 2, characterized in that, The drive assembly (36) includes a motor (361), which is fixedly connected to the bottom rear side of the base (1). The output end of the motor (361) passes through the base (1) and is fixedly connected to a first bevel gear (362). The rear ends of the two transmission rods (31) are fixedly connected to second bevel gears (363), and the rear ends of the two second bevel gears (363) are meshed with the first bevel gear (362).

6. The automatic demolding structure for plastic products according to claim 1, characterized in that, The demolding mechanism (2) also includes a guide sleeve (212), which is fixedly connected to the upper outer part of the dental brace (22). The top of the guide sleeve (212) is provided with multiple holes (213) at equal intervals.

7. The automatic demolding structure for plastic products according to claim 1, characterized in that, The demolding mechanism (2) also includes a rotating shaft (214), which is rotatably connected to the middle of the outer side of the dental brace (22), and the top size of the dental brace (22) matches the size of the small slider (24).

8. The automatic demolding structure for plastic products according to claim 2, characterized in that, The ejection mechanism (3) also includes a second rotating shaft (38), which is rotatably connected to the lower outer side of the rotating rod (33), and the top of the second rotating shaft (38) is fixedly connected to the second guide sleeve (5).

9. The automatic demolding structure for plastic products according to claim 2, characterized in that, The ejection mechanism (3) also includes guide bars (37), two guide bars (37) are fixedly connected to the top left and right sides of the hollow tube (21) respectively, and the outer side of the guide bars (37) is slidably connected to the top block (35).

10. The automatic demolding structure for plastic products according to claim 3, characterized in that, The adjustment mechanism (4) also includes a guide rail (48), which is fixedly connected to the bottom right side of the base (1), and the outer side of the guide rail (48) is slidably connected to the collar (46).

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