Plastic product production process and equipment thereof

Abstract

The invention relates to the technical field of plastic product production, in particular to a plastic product production process and equipment thereof.The plastic product production process comprises a polishing tool, annular holes are formed in the side walls of the two sides of the polishing tool, a fixing plate is arranged on one side of each annular hole and detachably connected with the polishing tool, and a cross-shaped sealing plate is arranged in the polishing tool; sealing plates are fixedly connected to the two ends of the cross-shaped sealing plate, the sealing plates are rotationally connected with the annular holes, first rotating shafts are fixedly connected to the two ends of the sealing plates, and one ends of the first rotating shafts penetrate through the fixing plate and extend out of the fixing plate. According to the polishing device, low-temperature gas can be blown while polishing is conducted, large burrs can be polished and removed, small burrs and burrs which are not polished cleanly can be frozen to be crisp and blown off through the low-temperature gas, then the problem that the burrs are not cleaned cleanly is avoided, in this way, during polishing, allowance can be reserved, and the polishing efficiency is improved. And the problem that the plastic product is easily damaged due to the fact that burrs need to be polished by the polishing head can be avoided.

Description

Technical Field

[0001] This invention relates to the field of plastic product manufacturing technology, specifically to a plastic product manufacturing process and equipment. Background Technology

[0002] Injection molding machines are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. Injection molding is achieved through an injection molding machine and a mold. In actual injection molding production, due to process or mold issues, burrs may be generated in the injection-molded products, causing them to fail to meet quality requirements. Therefore, it is necessary to remove these burrs.

[0003] A deburring device for injection molded products, disclosed in authorization announcement number CN218487992U, relates to the field of injection molded product processing. The key technical points of the device are: it includes a frame, a clamping fixture mounted on the frame, and a lifting platform assembly mounted above the clamping fixture and capable of vertical lifting. The clamping fixture includes a workpiece platform and a clamping assembly. The lifting platform assembly includes a lifting plate, with a turntable mounted on the side of the lifting plate near the workpiece platform. A driving component for rotating the turntable is mounted on the lifting plate. The turntable has several telescopic structures, each with a grinding head positioned at its telescopic end facing the workpiece platform. When the telescopic structure extends the grinding head, the grinding head abuts against the inner wall of the product edge. Each grinding head has a different grit size. The aforementioned device does not require a large amount of manual labor, which helps to ensure the yield rate and work efficiency of deburring products. It also allows for flexible selection of suitable grinding heads based on product characteristics. However, injection molding burrs are generally relatively soft. During grinding, large burrs can be ground directly to the end, while the remaining small burrs can deform and adhere to the surface of the injection molded product. If grinding is performed directly at this point, the burrs can deform and adhere to the outer wall of the injection molded product, resulting in incomplete grinding. If the grinding head is directly attached to the outer wall of the product for grinding, it can easily damage the injection molded product. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a plastic product manufacturing equipment, including a grinding fixture, wherein annular holes are provided on both side walls of the grinding fixture, and a fixing plate is provided on one side of the annular holes. The fixing plate is detachably connected to the grinding fixture. A cross-shaped sealing plate is provided inside the grinding fixture, and sealing plates are fixedly connected to both ends of the cross-shaped sealing plate. The sealing plates are rotatably connected to the annular holes. A first rotating shaft is fixedly connected to both ends of the sealing plate, and one end of the first rotating shaft passes through the fixing plate and extends to the outside of the fixing plate. A driving mechanism is fixedly connected to the outer wall of one of the fixing plates. Four clearance grooves are provided on the outer wall of the cross-shaped sealing plate, and product clamps are provided in the clearance grooves. A reversing structure is fixedly connected to one side wall of the fixing plate. A dividing heat-conducting plate is fixedly connected to the inner wall of the grinding fixture. The dividing heat-conducting plate divides the grinding fixture into a dry ice storage chamber and a refrigeration chamber. One product clamp is located in the refrigeration chamber. A spray pipe is connected to the inner wall of the dry ice storage chamber.

[0005] Preferably, the driving mechanism includes a motor fixedly connected to the fixed plate, and a worm gear is fixedly connected to the driving end of the motor. One end of one of the first rotating shafts is fixedly connected to a worm wheel, and the worm wheel meshes with the worm gear.

[0006] Preferably, the product fixture includes a fixture plate disposed in a relief groove, and a fixing groove is formed on the upper surface of the fixture plate. A second rotating shaft is fixedly connected to both ends of the fixture plate, and one end of the second rotating shaft passes through a sealing plate. A cavity is formed inside the fixture plate, and a spring sheet is fixedly connected to the inner wall of the cavity. A slide plate is fixedly connected to one end of the spring sheet. A strip groove is formed on one side wall of the fixing groove, and a clamping block is disposed within the strip groove. One end of the clamping block is fixed to the slide plate. A cavity is formed inside one of the second rotating shafts, and a push rod is disposed within the cavity. One end of the push rod passes through the cavity and extends to the outside of the second rotating shaft, while the other end of the push rod passes through the cavity and is fixedly connected to the slide plate. A guide rail is fixedly connected to one side wall of the fixing plate.

[0007] Preferably, the reversing structure includes two racks fixedly connected to the fixed plate, and a gear is fixedly connected to one end of the second rotating shaft near the rack. The length of the rack is half the circumference of the gear. A limiting cavity is opened inside the cross sealing plate, and a limiting structure is provided inside the limiting cavity.

[0008] Preferably, the limiting structure includes a limiting pin disposed in the limiting cavity, and a spring is sleeved on the outer wall of the limiting pin. One end of the spring is fixedly connected to the limiting pin. One end of the limiting pin passes through the cross sealing plate and extends to the outside of the cross sealing plate. An iron plate is fixedly connected to one end of the limiting pin located outside the cross sealing plate. Two pin holes are opened on one side wall of the fixed plate. The other end of the limiting pin passes through the cross sealing plate and extends into the pin holes. Two magnet blocks are fixedly connected to one side wall of the fixed plate.

[0009] Preferably, one end of the top rod has a groove, and a ball bearing is provided in the groove.

[0010] Preferably, the inner wall of the dry ice storage chamber is provided with a window that communicates with the outside, and a sealing door is provided on one side of the window, which is detachably connected to the grinding fixture.

[0011] A plastic product manufacturing process includes the following steps: a. Injection molding: Plastic granules are heated and melted in the barrel of an injection molding machine to make them viscous flow, and then injected into a closed mold cavity at high pressure and speed. After holding pressure and cooling, the granules are solidified and molded, and finally the mold is opened to eject the product. b. Grinding and cryogenic deburring: Attach the dry ice jet pipe to the grinding robot arm, with one end of the dry ice jet pipe facing the grinding position. Then place the plastic product on the grinding fixture for grinding. Grinding removes larger burrs. The dry ice jet pipe cools down the product during grinding, causing small burrs to become brittle and blow them off.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention can blow low-temperature gas while polishing, which can remove large burrs. For small burrs and burrs that are not cleaned properly, the low-temperature gas can freeze and blow them off, thus avoiding the problem of incomplete burr removal. In addition, this allows for a margin during polishing, which can prevent the polishing head from damaging plastic products when it needs to clean burrs.

[0013] 2. This invention features four product clamps. During use, two horizontal product clamps work in conjunction with a cross-shaped sealing plate to seal the refrigeration chamber, while the other product clamp is located inside the refrigeration chamber. This allows the product clamp inside the refrigeration chamber to pre-cool the plastic product during grinding and loading, freezing and brittleing the burrs on the outer wall of the product, making it easier to grind and blow off the burrs later. Furthermore, the low temperature in the refrigeration chamber is caused by the heat absorption of dry ice vaporization, eliminating the need for special refrigeration equipment. As a result, the cost of this device is low, making it very practical.

[0014] 3. In this invention, the two product clamps can be rotated to a horizontal position. When the two horizontal product clamps are in use, the robotic arm or other device can grind the product on one clamp while loading the product onto the other clamp. Therefore, grinding will not obstruct the loading process, thereby improving the efficiency of the device in grinding burrs.

[0015] 4. In this invention, when the two product clamps are in a horizontal position, the last clamp can separate the two horizontal clamps. In this way, when cleaning burrs, it can prevent burrs from being blown onto the product clamps that need to be loaded, thus avoiding affecting the loading and unloading of products when cleaning burrs.

[0016] 5. In this invention, when the product clamp rotates to the horizontal position, it can automatically flip over, so that the product is in the upper position, which facilitates the grinding of the robotic arm and the loading and unloading of materials. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall two-dimensional structure of the present invention; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 for Figure 3 Enlarged structural diagram at point B; Figure 6 is a partial structural schematic diagram of the present invention; Figure 7 is a partial schematic diagram of the two structures of the present invention; Figure 8 is a schematic diagram of the fixing plate structure of the present invention; Figure 9 This is a schematic diagram of the second fixing plate structure of the present invention; Figure 10 This is a partial cross-sectional view of the present invention.

[0018] In the diagram: 1. Grinding fixture; 2. Fixing plate; 3. Cross sealing plate; 4. Sealing plate; 5. First rotating shaft; 6. Clearance groove; 7. Dividing heat-conducting plate; 8. Dry ice storage chamber; 9. Refrigeration chamber; 10. Nozzle; 11. Motor; 12. Worm gear; 13. Worm wheel; 14. Fixture plate; 15. Fixing groove; 16. Second rotating shaft; 17. Spring plate; 18. Slide plate; 19. Strip groove; 20. Clamping block; 21. Top rod; 22. Guide rail; 23. Rack; 24. Gear; 25. Limiting chamber; 26. Limiting pin; 27. Spring; 28. Iron plate; 29. ​​Pin hole; 30. Magnet block; 31. Ball bearing; 32. Sealing door. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Please see Figures 1 to 10A plastic product manufacturing equipment includes a grinding fixture 1. Both sides of the grinding fixture 1 have annular holes, and a fixing plate 2 is provided on one side of each annular hole. The fixing plate 2 is detachably connected to the grinding fixture 1. A cross-shaped sealing plate 3 is provided inside the grinding fixture 1, and sealing plates 4 are fixedly connected to both ends of the cross-shaped sealing plate 3. The sealing plates 4 are rotatably connected to the annular holes. A first rotating shaft 5 is fixedly connected to both ends of the sealing plates 4, and one end of the first rotating shaft 5 passes through the fixing plate 2 and extends to the outside of the fixing plate 2. A driving mechanism is fixedly connected to the outer wall of one of the fixing plates 2. Four clearance grooves 6 are provided on the outer wall of the cross-shaped sealing plate 3, and product clamps are provided in the clearance grooves 6. A reversing structure is fixedly connected to one side wall of the fixing plate 2. A dividing heat-conducting plate 7 is fixedly connected to the inner wall of the grinding fixture 1, dividing the grinding fixture 1 into a dry ice storage chamber 8 and a refrigeration chamber 9. One product clamp is located in the refrigeration chamber 9. A spray pipe 10 is connected to the inner wall of the dry ice storage chamber 8.

[0021] As can be seen from the above structure: by setting a driving mechanism, the cross sealing plate 3 and the product clamp can be driven to rotate; by setting a reversing structure, the direction of the product clamp can be ensured when the product clamp is in a horizontal position, so that the product placed on the product clamp is at the top; by setting a dry ice storage chamber 8, dry ice can be placed; and by setting a refrigeration chamber 9, a low temperature environment can be created.

[0022] Furthermore, the drive mechanism includes a motor 11 fixedly connected to the fixed plate 2, and a worm gear 12 is fixedly connected to the drive end of the motor 11. One end of the first rotating shaft 5 is fixedly connected to a worm wheel 13, and the worm wheel 13 meshes with the worm gear 12. By setting the worm wheel 13, the worm gear 12 and the motor 11 to work together, the cross sealing plate 3 and the product fixture can be driven to rotate. When in use, the motor 11 is started, so that the motor 11 drives the worm gear 12 to rotate. The rotating worm gear 12 drives the worm wheel 13 to rotate, and the rotating worm wheel 13 drives the first rotating shaft 5 and the cross sealing plate 3 to rotate.

[0023] Furthermore, the product fixture includes a fixture plate 14 disposed within the relief groove 6, and a fixing groove 15 is formed on the upper surface of the fixture plate 14. Both ends of the fixture plate 14 are fixedly connected to second rotating shafts 16, one end of which penetrates the sealing plate 4. A cavity is formed inside the fixture plate 14, and a spring plate 17 is fixedly connected to the inner wall of the cavity. One end of the spring plate 17 is fixedly connected to a sliding plate 18. A strip groove 19 is formed on one side wall of the fixing groove 15, and a clamping block 20 is disposed within the strip groove 19. One end of the clamping block 20 is fixed to the sliding plate 18. A cavity is formed inside one of the second rotating shafts 16, and a push rod is disposed within the cavity. 21. One end of the push rod 21 passes through the cavity and extends to the outside of the second rotating shaft 16. The other end of the push rod 21 passes through the cavity and is fixedly connected to the slide plate 18. A guide rail 22 is fixedly connected to one side wall of the fixing plate 2. By setting the clamping plate 14 and other components, the product that needs to be deburred can be fixed. When in use, the product is placed in the fixing groove 15. When the product clamp rotates, the push rod 21 rotates to the position where it abuts against the guide rail 22. At this time, the push rod 21 moves due to the abutment of the guide rail 22. The moving push rod 21 drives the slide plate 18 to move. The moving slide plate 18 drives the clamping block 20 to move. The moving clamping block 20 squeezes the product and completes the fixing.

[0024] Furthermore, the reversing structure includes two racks 23 fixedly connected to the fixed plate 2. A gear 24 is fixedly connected to one end of the second rotating shaft 16 near the rack 23. The length of the rack 23 is half the circumference of the gear 24. A limiting cavity 25 is opened inside the cross sealing plate 3, and a limiting structure is provided in the limiting cavity 25. By setting the gear 24 and rack 23 to work together, after the cross sealing plate 3 and the product fixture rotate at a certain angle, the gear 24 rotates to the position of meshing with the rack 23. At this time, the rack 23 causes the gear 24, the second rotating shaft 16, and the product fixture to flip.

[0025] Furthermore, the limiting structure includes a limiting pin 26 disposed within the limiting cavity 25, and a spring 27 sleeved on the outer wall of the limiting pin 26. One end of the spring 27 is fixedly connected to the limiting pin 26. One end of the limiting pin 26 passes through the cross sealing plate 3 and extends to the outside of the cross sealing plate 3. An iron plate 28 is fixedly connected to one end of the limiting pin 26 located outside the cross sealing plate 3. Two pin holes 29 are opened on one side wall of the fixing plate 2. The other end of the limiting pin 26 passes through the cross sealing plate 3 and extends into the pin hole 29. Two magnet blocks 30 are fixedly connected to one side wall of the fixing plate 2. By setting the limiting pin 26 to cooperate with the pin hole 29, the limiting pin 26 can limit the product fixture and ensure the stability of the product fixture position. Before the product fixture needs to be flipped, the limiting pin 26 can automatically pull out of the pin hole 29.

[0026] Furthermore, a groove is provided at one end of the push rod 21, and a ball bearing 31 is provided in the groove; by providing the ball bearing 31, the friction between one end of the push rod 21 and the guide rail 22 can be reduced.

[0027] Furthermore, the inner wall of the dry ice storage chamber 8 is provided with a window that communicates with the outside, and a sealing door 32 is provided on one side of the window. The sealing door 32 is detachably connected to the grinding fixture 1. By providing the window, dry ice can be put into the dry ice storage chamber 8, and by providing the sealing door 32, the window can be sealed.

[0028] A plastic product manufacturing process includes the following steps: a. Injection molding: Plastic granules are heated and melted in the barrel of an injection molding machine to make them viscous flow, and then injected into a closed mold cavity at high pressure and speed. After holding pressure and cooling, the granules are solidified and molded, and finally the mold is opened to eject the product. b. Grinding and freezing deburring: Attach the dry ice jet pipe to the grinding robot arm, with one end of the dry ice jet pipe facing the grinding position. Then place the plastic product on the grinding fixture 1 for grinding. Grinding removes larger burrs. The dry ice jet pipe cools down the product during grinding, causing small burrs to become brittle and blow them off.

[0029] In this invention, the device is placed on one side of a robotic arm with a grinding head, and then the nozzle 10 is tied to the robotic arm so that one end of the nozzle 10 faces the grinding head. Then the sealing door 32 is opened, dry ice is put into the dry ice storage chamber 8, and the sealing door 32 is closed. It is then ready for use. When in use, the dry ice absorbs heat when it vaporizes, which can lower the temperature of the segmented heat-conducting plate 7. The lower temperature of the segmented heat-conducting plate 7 can lower the temperature inside the refrigeration chamber 9. The product is placed into the fixed slot 15 of one of the product clamps for loading. After loading is completed, the motor 11 is started, which drives the worm gear 12 to rotate. The rotating worm gear 12 drives the worm wheel 13 to rotate. The rotating worm wheel 13 drives the first rotating shaft 5, the cross sealing plate 3, the product clamp and the product that has just been loaded to rotate. When the product clamp rotates, the push rod 21 rotates to the position of abutting against the guide rail 22. At this time, the push rod 21 moves due to the abutment of the guide rail 22. The moving push rod 21 drives the slide plate 18 to move. The moving slide plate 18 drives the clamping block 20 to move. The moving clamping block 20 squeezes the product and completes the fixing. The motor 11 stops after the first rotating shaft 5, the cross sealing plate 3, the product clamp and the product that has just been loaded have rotated 90 degrees. At this time, the product is transferred to the cold storage chamber 9 for pre-cooling to freeze the burrs on the outer wall of the product to make them brittle, so that they can be polished and blown off later. When another product fixture rotates to the position where it was just loaded, it can load another product fixture. After loading is completed, the motor 11 is started again, so that the motor 11 drives the product fixture to rotate 90 degrees again, and transfers the product that was just loaded into the cold storage chamber 9 for pre-cooling. Before the pre-cooled product rotates 90 degrees, the iron plate 28 rotates to one side of the magnet block 30. At this time, the magnet block 30 attracts the iron plate 28 to move. The moving iron plate 28 drives the limit pin 26 to move, so that the limit pin 26 disengages from the pin hole 29. Then the gear 24 rotates to the position of meshing with the rack 23. When the pre-cooled product continues to rotate, the rack 23 causes the gear 24, the second rotating shaft 16, the product clamp and the pre-cooled product to flip over, so that after the pre-cooled product rotates 90 degrees, the pre-cooled product is on top, so that the robotic arm can clean the burrs with the grinding head and the nozzle 10. After the pre-cooled product is rotated 90 degrees, the spring 27 pushes the limit pin 26 to insert into another pin hole 29, so that the limit pin 26 can limit the product fixture and ensure the stability of the product fixture position.

[0030] After deburring and loading are completed, motor 11 is started again, causing motor 11 to drive the product fixture to rotate 90 degrees again, so that the deburred product and the product fixture rotate 90 degrees. In this way, the product fixture with the deburred product is located between the next product fixture for deburring and the product fixture for loading. During the deburring process, it can prevent the burrs from being blown onto the product fixture that needs to be loaded. After the blocking is completed, the motor 11 is started again, causing the motor 11 to drive the product clamp to rotate 90 degrees again. The product clamp will then rotate to its initial position. When the product clamp rotates to its initial position, it will also go through the limit contact and reversal, so that when the product rotates to its initial position, the product is above the product clamp. When the product clamp rotates to its initial position, one end of the push rod 21 disengages from the guide rail 22. At this time, the spring plate 17 will push the slide plate 18 and the clamping block 20 to reset, so that the clamping block 20 releases its grip on the product, and the user can then put the product on or off.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic product manufacturing equipment, comprising a grinding fixture (1), characterized in that, The grinding fixture (1) has annular holes on both sides of its sidewalls, and a fixing plate (2) is provided on one side of the annular holes. The fixing plate (2) is detachably connected to the grinding fixture (1). A cross-shaped sealing plate (3) is provided inside the grinding fixture (1), and sealing plates (4) are fixedly connected to both ends of the cross-shaped sealing plate (3). The sealing plates (4) are rotatably connected to the annular holes. A first rotating shaft (5) is fixedly connected to both ends of the sealing plates (4), and one end of the first rotating shaft (5) passes through the fixing plate (2) and extends to the outside of the fixing plate (2). One of the fixing plates (2) is fixedly connected to the annular holes. A drive mechanism is fixedly connected to the outer wall of the plate (2). The outer wall of the cross sealing plate (3) is provided with four clearance grooves (6), and a product clamp is provided in the clearance groove (6). A reversing structure is fixedly connected to one side wall of the fixed plate (2). A dividing heat conduction plate (7) is fixedly connected to the inner wall of the grinding fixture (1). The dividing heat conduction plate (7) divides the grinding fixture (1) into a dry ice storage chamber (8) and a refrigeration chamber (9). One of the product clamps is located in the refrigeration chamber (9). A nozzle (10) is connected to the inner wall of the dry ice storage chamber (8).

2. The plastic product manufacturing equipment according to claim 1, characterized in that, The driving mechanism includes a motor (11) fixedly connected to the fixed plate (2), and a worm (12) is fixedly connected to the driving end of the motor (11). One end of the first rotating shaft (5) is fixedly connected to a worm wheel (13), and the worm wheel (13) meshes with the worm (12).

3. The plastic product manufacturing equipment according to claim 2, characterized in that, The product fixture includes a fixture plate (14) disposed in a relief groove (6), and a fixing groove (15) is provided on the upper surface of the fixture plate (14). A second rotating shaft (16) is fixedly connected to both ends of the fixture plate (14), and one end of the second rotating shaft (16) passes through a sealing plate (4). A cavity is provided inside the fixture plate (14), and a spring plate (17) is fixedly connected to the inner wall of the cavity. A sliding plate (18) is fixedly connected to one end of the spring plate (17). The fixing groove (15) is located on one side of the... The wall has a strip groove (19) and a clamping block (20) is provided in the strip groove (19). One end of the clamping block (20) is fixed to the slide plate (18). One of the second rotating shafts (16) has a cavity inside and a top rod (21) is provided in the cavity. One end of the top rod (21) passes through the cavity and extends to the outside of the second rotating shaft (16). The other end of the top rod (21) passes through the cavity and is fixedly connected to the slide plate (18). A guide rail (22) is fixedly connected to one side wall of the fixing plate (2).

4. The plastic product manufacturing equipment according to claim 3, characterized in that, The reversing structure includes two racks (23) fixedly connected to the fixed plate (2). A gear (24) is fixedly connected to one end of the second rotating shaft (16) near the rack (23). The length of the rack (23) is half the circumference of the gear (24). A limiting cavity (25) is opened inside the cross sealing plate (3), and a limiting structure is provided inside the limiting cavity (25).

5. The plastic product manufacturing equipment according to claim 4, characterized in that, The limiting structure includes a limiting pin (26) disposed in the limiting cavity (25), and a spring (27) is sleeved on the outer wall of the limiting pin (26). One end of the spring (27) is fixedly connected to the limiting pin (26). One end of the limiting pin (26) passes through the cross sealing plate (3) and extends to the outside of the cross sealing plate (3). One end of the limiting pin (26) located outside the cross sealing plate (3) is fixedly connected to an iron plate (28). Two pin holes (29) are opened on one side wall of the fixing plate (2). The other end of the limiting pin (26) passes through the cross sealing plate (3) and extends into the pin hole (29). Two magnet blocks (30) are fixedly connected to one side wall of the fixing plate (2).

6. The plastic product manufacturing equipment according to claim 3, characterized in that, One end of the top rod (21) is provided with a slot, and a ball bearing (31) is provided in the slot.

7. The plastic product manufacturing equipment according to claim 1, characterized in that, The inner wall of the dry ice storage chamber (8) is provided with a window that communicates with the outside world, and a sealing door (32) is provided on one side of the window. The sealing door (32) is detachably connected to the grinding fixture (1).

8. A manufacturing process for plastic products, characterized in that, The plastic product manufacturing equipment according to any one of claims 1 to 7, wherein the plastic product manufacturing process includes the following steps: a. Injection molding: Plastic granules are heated and melted in the barrel of an injection molding machine to make them viscous flow, and then injected into a closed mold cavity at high pressure and speed. After holding pressure and cooling, the granules are solidified and molded, and finally the mold is opened to eject the product. b. Grinding and freezing to remove burrs: The dry ice jet pipe is tied to the grinding robot arm so that one end of the dry ice jet pipe faces the grinding position. Then the plastic product is placed on the grinding fixture (1) for grinding. The grinding removes larger burrs. The dry ice jet pipe cools down the small burrs during grinding, making them brittle and blowing them off.

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