Plastic product post-injection processing equipment and processing technology

Abstract

The application relates to a plastic product injection molding post-processing device and processing technology, which comprises a transfer mechanism for clamping and moving a workpiece and a cooling mechanism for cooling the workpiece and absorbing harmful gas, the cooling mechanism comprises a cooling box with an open upper end and a cooling driving element for absorbing air in the cooling box, an air inlet of the cooling driving element is communicated with the cooling box, and an air outlet of the cooling driving element is communicated with a waste gas treatment device; the transfer mechanism comprises a clamping element clamped on the outer wall of the workpiece and a clamping moving element for driving the clamping element to move, and the clamping element is connected to the free end of the clamping moving element. After the injection molding is completed, the clamping element takes the workpiece out of the mold and moves into the cooling box, the cooling driving element drives air to flow from the surface of the workpiece so as to remove volatile organic compounds on the surface of the workpiece, and the temperature of the workpiece is lowered; after the workpiece is cooled, no volatile organic compounds are generated in the workpiece, and workers are not harmed when the workpiece is moved.

Description

Technical Field

[0001] This application relates to the technical field of injection molding equipment, and in particular to a post-injection molding processing equipment and process for plastic products. Background Technology

[0002] Plastic water bottles are typically produced using food-grade plastics such as polypropylene and polyethylene through injection molding. During the process, masterbatch is melted and then injected into a mold for molding. After molding, the mold is separated and the formed water bottle is removed from the mold, thus completing the production of the water bottle.

[0003] However, during the thermoforming process, even though the plastic is made of food-grade material, it still releases volatile organic compounds such as styrene and methyl acrylate. When the kettle is removed from the mold, it is still at a high temperature and continues to release these organic compounds, which can easily lead to workers inhaling them and affecting their health.

[0004] Therefore, a new technical solution is needed to address the above problems. Summary of the Invention

[0005] In order to minimize the harm to human health caused by volatile organic compounds on the surface of workpieces after injection molding, this application provides a post-injection molding processing equipment and process for plastic products.

[0006] This application provides a post-injection molding processing device for plastic products, which adopts the following technical solution:

[0007] A plastic product injection molding post-processing equipment and process includes a transfer mechanism for clamping and moving a workpiece and a cooling mechanism for cooling the workpiece and absorbing harmful gases. The cooling mechanism includes a cooling box with an open top and a cooling drive for absorbing air from the cooling box. The air inlet of the cooling drive is connected to the cooling box, and the air outlet of the cooling drive is connected to a waste gas treatment device.

[0008] The transfer mechanism includes a clamping member clamped on the outer wall of the workpiece and a clamping moving member that drives the clamping member to move. The clamping member is connected to the free end of the clamping moving member.

[0009] By adopting the above technical solution, after injection molding is completed, the clamping component removes the workpiece from the mold and moves it into the cooling box. The cooling drive component drives air to flow over the surface of the workpiece, thereby removing volatile organic compounds from the surface of the workpiece and lowering the temperature of the workpiece. After the workpiece is cooled, no more volatile organic compounds will be generated inside it, and there will be no harm to the workers when the workpiece is moved.

[0010] Optionally: The upper end of the cooling box is rotatably connected to a cooling door for opening and closing the upper opening of the cooling box. The cooling door has a clearance groove for passing through it to hold a moving part. The clearance groove passes through the side of the cooling door away from the rotation axis. The cooling box is also provided with an opening and closing mechanism for opening and closing the cooling door.

[0011] By adopting the above technical solution, the upper opening of the cooling box is sealed by the cooling door, and after the air pressure inside the cooling box is reduced, the outside air will enter the cooling box through the clearance groove and blow over the surface of the workpiece, so that the volatile organic compounds on the surface of the workpiece can be more easily removed from the surface of the workpiece with the flowing air.

[0012] Optional: The opening and closing mechanism includes a sliding block slidably disposed in the cooling box, a rack fixed on the sliding block, a gear rotatably connected in the cooling box, a roller coaxially fixed on the gear, a connecting rope sleeved on the roller, and a reset elastic element disposed on the cooling box. The torsion spring is connected to the cooling door and pushes the cooling door to open. The upper end of the sliding block is used to connect with the clamping element. The gear meshes with the rack. The end of the connecting rope away from the roller is connected to the cooling door.

[0013] By adopting the above technical solution, after the clamping component moves the workpiece into the cooling box, the clamping component drives the sliding block to move downward, thereby driving the winding roller to wind up the connecting rope, thereby causing the cooling door to rotate toward the cooling box and close the upper opening of the cooling box, so that the cooling door can close automatically, making the use of the cooling box more convenient.

[0014] Optionally: The cooling box has a bottom opening, and a support mechanism for supporting the workpiece is provided at the bottom of the cooling box. The support mechanism includes a support plate rotatably connected to the bottom of the cooling box and a support seat fixed on the support plate. The support seat is hollow, and a number of suction cups communicating with its inner cavity are provided on the outer wall of the support seat. The workpiece is sleeved on the outside of the support seat. The inner cavity of the support seat is connected to the air inlet of the cooling drive component. The support plate rotates upward and seals the bottom opening of the cooling box.

[0015] By adopting the above technical solution, after the workpiece has cooled down, the clamping component directly places the workpiece on the carrier. The clamping component can then move back into the injection molding machine to clamp and move a new workpiece. The cooled workpiece is then flipped to a horizontal position under the drive of the carrier, making it easy to remove the workpiece from the carrier.

[0016] Optionally: The racks are respectively disposed on both sides of the sliding block, and rollers are disposed on both sides of the sliding block. The connecting rope not connected to the cooling door is connected to the bearing plate.

[0017] By adopting the above technical solution, the support plate located below can also move automatically under the drive of the opening and closing mechanism. That is, after the clamping part moves into the cooling box, it can also drive the support plate to move upward to close the lower opening of the cooling box.

[0018] Optionally, it also includes a cutting mechanism for removing sprues from the workpiece, the cutting mechanism including a cutter and a cutting drive for driving the cutter to move horizontally, the cutting drive being connected to a cooling box, and the cutter being used to abut against the end face of a horizontally positioned support away from the support plate.

[0019] By adopting the above technical solution, after the support seat drives the workpiece to rotate to a horizontal state, the cutter moves toward the workpiece to cut off the connection between the workpiece and the sprue, realizing the automatic separation of the sprue. After the workpiece is removed from the support seat, there is no need to perform positioning and sprue removal, making the process of removing the sprue from the workpiece more convenient.

[0020] Optionally: A fixing plate is provided at the lower end of the cooling box, and the fixing plate abuts against the end face of the downward rotating support plate away from the support seat.

[0021] By adopting the above technical solution, when the bearing plate is subjected to the thrust applied by the cutter, the fixing plate supports the bearing plate, so that the bearing plate will not exert excessive pressure on its rotation axis, and the bearing plate can still maintain a vertical state under stress, so that the cutting process of the sprue is not easily affected.

[0022] A post-injection molding process for plastic products includes the following steps:

[0023] S1. Remove the product from the injection molding machine and place it vertically in the cooling box. Remove the air from the cooling box so that the air flows over the surface of the product and carries away the volatile substances and heat until the product temperature drops to room temperature.

[0024] S2. Place the product on the support and allow it to flip to a horizontal position as the support rotates, then cut the sprue to separate the product from the sprue.

[0025] S3. Increase the air pressure inside the support to atmospheric pressure and remove the product from the support.

[0026] By adopting the above technical solution, when the product is taken out of the mold, the surface of the product is ventilated to remove volatile substances from the surface of the product. At the same time, when the air flows over the surface of the product, it can also carry away the heat of the product and cool the product. After the product cools down, its surface will not release volatile organic compounds, so it will not cause harm to workers when the product is moved.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When the product is removed from the mold, the surface of the product is ventilated to remove volatile substances from the surface of the product. At the same time, the air flowing over the surface of the product can also carry away the heat of the product and cool it down. After the product cools down, its surface will not release volatile organic compounds, so it will not cause harm to workers when the product is moved.

[0029] 2. After the product has cooled, rotate the support downwards to make the product horizontal. Then, cut off the sprue on the product and remove the product from the support, making the product handling more convenient. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0031] Figure 2 This is a schematic diagram illustrating the structure of the load-bearing mechanism in an embodiment of this application;

[0032] Figure 3 for Figure 2 Enlarged view of part A;

[0033] Figure 4 for Figure 1 Enlarged view of part B.

[0034] In the diagram, 1. Frame; 2. Transfer mechanism; 21. Clamping component; 22. Clamping moving component; 23. Abutment block; 3. Cooling mechanism; 31. Cooling box; 32. Cooling drive component; 33. Cooling door; 331. Relief groove; 34. Fixing plate; 4. Bearing mechanism; 41. Bearing plate; 42. Bearing seat; 43. Vent hole; 44. Suction cup; 5. Opening and closing mechanism; 51. Sliding block; 52. Rack; 53. Gear; 54. Roller; 55. Connecting rope; 56. Reset elastic component; 6. Cutting mechanism; 61. Cutter; 62. Cutting drive component; 63. Sliding seat. Detailed Implementation

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] This application discloses a post-injection molding processing device for plastic products, such as... Figure 1As shown, the system includes a frame 1, a transfer mechanism 2 for clamping and moving workpieces, and a cooling mechanism 3 for cooling the workpieces and absorbing volatile substances. The cooling mechanism 3 includes a cooling box 31 with openings at both the top and bottom, and a cooling drive unit 32 for absorbing harmful gases from the cooling box 31. The cooling box 31 is bolted to the frame 1. In this embodiment, the cooling drive unit 32 is an air pump. The air inlet of the air pump is connected to the inner cavity of the cooling box 31 through a pipe, and the air outlet of the air pump is connected to an exhaust gas treatment device through a pipe. Thus, after the workpiece is placed in the cooling box 31, air flows over the surface of the workpiece, thereby lowering the surface temperature of the workpiece and absorbing the harmful gases from the surface of the workpiece, making the workpiece less susceptible to the influence of harmful gases when moving it.

[0037] The transfer mechanism 2 includes a clamping member 21 for clamping the workpiece and a clamping moving member 22 for moving the clamping member 21. In this embodiment, the clamping member 21 is a pneumatic three-jaw gripper. The clamping moving member 22 includes a first pneumatic slide table arranged horizontally, a second pneumatic slide table arranged vertically on the first pneumatic slide table, and a rotary cylinder arranged on the second pneumatic slide table. The pneumatic three-jaw gripper is arranged on the moving end of the rotary cylinder, so that after the clamping member 21 takes the horizontal workpiece out of the mold, it can rotate the workpiece to a vertical state and place it in the cooling box 31.

[0038] like Figure 2 As shown, in order to make it easier to remove harmful gases from the surface of the air-cooled workpiece, a cooling door 33 is rotatably connected to the upper end of the cooling box 31 to open and close the upper opening of the cooling box 31. A clearance groove 331 for clamping and moving is passed through the cooling door 33. The clearance groove 331 passes through the side wall of the cooling door 33 away from its rotation axis. The clamping and moving part 22 can be located in the clearance groove 331. Thus, when the cooling door 33 is closed, the clamping part 21 and the workpiece can still be stably located in the cooling box 31. In the process of removing air from the cooling box 31, the air flows towards the workpiece and then enters the air pump, making it easier to remove harmful substances from the surface of the workpiece.

[0039] Since the workpiece needs to remain stationary in the cooling box 31 for a period of time, if the position is constantly limited by the clamping member 21, it will require waiting for the workpiece to be removed and placed in the cooling box 31 before the next batch of workpieces can be clamped, thus affecting processing efficiency. Therefore, a support mechanism 4 for supporting the workpiece to be cooled is also provided at the lower end of the cooling box 31. The support mechanism 4 includes a support plate 41 rotatably connected to the lower end of the cooling box 31 and a support seat 42 fixed on the support plate 41. The workpiece is sleeved on the outer wall of the support seat 42. The support base 42 is hollow, and several ventilation holes 43 are penetrating its outer wall. Several suction cups 44 are installed in some of the ventilation holes 43. The suction cups 44 are connected to the inner cavity of the support base 42. A flexible tube is also provided at the air inlet end of the cooling drive unit 32. The flexible tube passes through the support plate 41 and the support base 42 and is fixed to the support base 42. Thus, when the cooling drive unit 32 removes the air from the inner cavity of the support base 42, a certain negative pressure can be generated inside the suction cups 44. When the support base 42 is rotated to a horizontal state, the workpiece is not easy to detach directly. At the same time, the suction cups 44 can also prevent the workpiece from directly adhering to the surface of the support base 42. The ventilation holes 43 can drive the harmful gas attached to the inner cavity of the workpiece to flow towards the support base 42, thereby removing the harmful gas attached to the inner cavity of the workpiece.

[0040] like Figure 2 and Figure 3 As shown, the cooling box 31 is also equipped with an opening and closing mechanism 5 that drives the cooling door 33 and the load-bearing door to close the opening of the cooling box 31. The opening and closing mechanism 5 is configured in two sets and is located on both sides of the cooling box 31. The opening and closing mechanism 5 includes a sliding block 51 slidably disposed on the inner wall of the cooling box 31, a rack 52 fixed on the two side walls of the sliding block 51, two gears 53 rotatably connected inside the cooling box 31, a roller 54 coaxially fixed on the gears 53, a connecting rope 55 sleeved on the roller 54, and a reset elastic element 56 disposed on the cooling box 31. The gears 53 are respectively disposed on both sides of the sliding block 51, and the gears 53 are both meshed with the rack 52. The end of the connecting rope 55 away from the roller 54 is respectively connected to the cooling door 33 and the closing plate. The clamping and moving member 22 is provided with an abutment block 23 on the free end of the clamping member 21. The lower end of the abutment block 23 abuts against the upper end of the sliding block 51. After the clamping member 21 moves the workpiece into the cooling box 31, it pushes the sliding block 51 down, thereby causing the closing door and cooling door 33 to close. In this embodiment, the reset elastic member 56 is a torsion spring. The axis of the torsion spring coincides with the rotation axis of the cooling door 33. One end of the torsion spring is connected to the cooling box 31, and the other end of the torsion spring is connected to the cooling door 33. The reset elastic member 56 applies a spring force to the cooling door 33, causing the cooling door 33 to rotate away from the cooling box 31, thereby keeping it open.

[0041] like Figure 4As shown, the frame 1 is also equipped with a cutting mechanism 6 for removing sprues from the workpiece. The cutting mechanism 6 includes a cutter 61 and a cutting drive 62 that drives the cutter 61 to move horizontally. A sliding seat 63 slides horizontally on the frame 1. In this embodiment, the cutting drive 62 is a hydraulic cylinder. The cutting drive 62 is fixed to the sliding seat with bolts. The free end of the cutting drive 62 is connected to the cutter 61, thereby driving the cutter 61 to move towards the support seat 42 and remove the sprues from the workpiece. The frame 1 is also equipped with a sliding drive that pushes the sliding seat 63 to reciprocate. In this embodiment, the sliding drive is a hydraulic cylinder, and the free end of the sliding drive is connected to the sliding seat.

[0042] like Figure 2 As shown, when the sprue is cut off, the bearing plate 41 will be subjected to pressure by the cutter 61, which will cause deformation at the pivot of the bearing plate 41. Therefore, the lower end of the cooling box 31 is also fixed with bolts to a vertically arranged fixing plate 34. The fixing plate 34 abuts against the end of the vertical bearing plate 41 away from the bearing seat 42, thereby using the fixing plate 34 to support the bearing plate 41, so that the bearing plate 41 is not easily damaged when subjected to the force applied by the cutter 61.

[0043] The implementation principle of this embodiment is as follows: After injection molding is completed and the mold is opened, the clamping member 21 clamps the workpiece ejected from the mold and rotates the workpiece to a vertical position, and puts the workpiece on the support seat 42. During the process of clamping the workpiece on the support seat 42, the clamping member 21 also pushes the sliding block 51 to move down, so that the cooling door 33 and the support plate 41 are closed. Then the cooling drive member 32 drives the air to flow through the surface and inner wall of the workpiece, thereby sucking away harmful substances. After that, the clamping member 21 detaches from the cooling box 31 and continues to clamp another workpiece located in the mold. The support plate 41 drives the workpiece to rotate to a horizontal position. The cutter 61 moves toward the workpiece and separates the sprue from the workpiece. Then the workpiece is removed from the support seat 42.

[0044] A post-injection molding process for plastic products includes the following steps:

[0045] S1. Remove the product from the injection molding machine and place it vertically in the cooling box 31. Air is drawn out of the cooling box 31 so that air flows through the surface and inside of the product to carry away volatile substances and heat until the product temperature drops to room temperature.

[0046] S2. Place the product on the support 42 and rotate the support 42 to flip the product to a horizontal position, cut the sprue to separate the product from the sprue;

[0047] S3. Increase the air pressure inside the support 42 to atmospheric pressure and remove the product from the support 42.

[0048] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A post-injection molding processing device for plastic products, characterized in that: The system includes a transfer mechanism (2) for clamping and moving a workpiece and a cooling mechanism (3) for cooling the workpiece and absorbing harmful gases. The cooling mechanism (3) includes a cooling box (31) with an open top and a cooling drive (32) for absorbing air from the cooling box (31). The air inlet of the cooling drive (32) is connected to the cooling box (31), and the air outlet of the cooling drive (32) is connected to a waste gas treatment device. The transfer mechanism (2) includes a clamping member (21) clamping the workpiece on its outer wall and a clamping moving member (22) for moving the clamping member (21). The clamping member (21) is connected to... The free end of the clamping moving part (22) is connected to the upper end of the cooling box (31), which is rotatably connected to a cooling door (33) for opening and closing the upper opening of the cooling box (31). The cooling door (33) has a clearance groove (331) for the passage of the clamping moving part (22). The clearance groove (331) passes through the side of the cooling door (33) away from the rotation axis. The cooling box (31) is also provided with an opening and closing mechanism (5) for opening and closing the cooling door (33). The opening and closing mechanism (5) includes a sliding block (51) slidably disposed in the cooling box (31) and a rack (52) fixed on the sliding block (51). The cooling box (31) is equipped with a gear (53) rotatably connected to the cooling box (31), a roller (54) coaxially fixed to the gear (53), a connecting rope (55) sleeved on the roller (54), and a reset elastic element (56) set on the cooling box (31). The reset elastic element (56) is a torsion spring, which is connected to the cooling door and pushes the cooling door to open. The upper end of the sliding block (51) is used to connect with the clamping member (21). The gear (53) meshes with the rack (52). The end of the connecting rope (55) away from the roller (54) is connected to the cooling door (33). The cooling box (31) is set with a bottom opening. The lower end of the cooling box (31) is provided with a support mechanism (4) for carrying the workpiece. The support mechanism (4) includes a support plate (41) rotatably connected to the lower end of the cooling box (31) and a support seat (42) fixed on the support plate (41). The support seat (42) is hollow. Several suction cups (44) communicating with its inner cavity are provided on the outer wall of the support seat (42). The workpiece is sleeved on the support seat (42). The inner cavity of the support seat (42) is connected to the air inlet of the cooling drive component (32). The support plate (41) rotates upward and seals the lower opening of the cooling box (31).

2. The post-injection molding processing equipment for plastic products according to claim 1, characterized in that: The racks (52) are respectively disposed on both sides of the sliding block (51), and the sliding block (51) is provided with rollers (54) on both sides. The connecting rope (55) not connected to the cooling door is connected to the bearing plate (41).

3. The post-injection molding processing equipment for plastic products according to claim 1, characterized in that: It also includes a cutting mechanism (6) for removing sprues from workpieces. The cutting mechanism (6) includes a cutter (61) and a cutting drive (62) for driving the cutter (61) to move horizontally. The cutting drive (62) is connected to the cooling box (31). The cutter (61) is used to abut against the end face of the horizontally arranged support (42) away from the support plate (41).

4. The post-injection molding processing equipment for plastic products according to claim 1, characterized in that: The lower end of the cooling box (31) is provided with a fixing plate (34), which abuts against the end face of the downward rotating bearing plate (41) away from the bearing seat (42).

5. A post-injection molding process for plastic products, using the post-injection molding equipment for plastic products as described in any one of claims 1-4, characterized in that: Includes the following steps: S1. Remove the product from the injection molding machine and place it vertically in the cooling box (31). Air is drawn out of the cooling box (31) so that air flows over the surface of the product and carries away volatile substances and heat until the product temperature drops to room temperature. S2. Place the product on the support (42) and rotate the support (42) to flip the product to a horizontal position, cut the sprue to separate the product from the sprue; S3. Increase the air pressure in the carrier (42) to atmospheric pressure and remove the product from the carrier (42).

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