A hot air processing line for plastic articles

Abstract

This invention discloses a heat-drying processing line for plastic products, relating to the field of plastic product processing. It includes a drying chamber and conveyor belts for feeding and discharging. Both side walls of the drying chamber have feeding ports, and both sides of the drying chamber have overlapping grooves at the bottom wall of the feeding ports for placing two conveyor belts. Lifting sealing plates are slidably installed on the outer side walls of the drying chamber at the feeding ports. A turntable is embedded in the center of the inner bottom wall of the drying chamber. Movable cavities are formed on both sides of the turntable at the inner bottom of the drying chamber. Each movable cavity is equipped with a pushing component, which is used to connect with the descending sealing plate. After heat drying, the plastic products are pushed from the turntable onto the discharge conveyor belt. This invention achieves automatic feeding and discharging of plastic products during heat drying, eliminating the need for manual assistance, reducing labor costs, improving production efficiency, and constructing a complete linkage structure of feeding-heat drying-discharging, thereby improving drying efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of plastic product processing, specifically to a hot drying processing line for plastic products. Background Technology

[0002] Plastic products are a general term for various items made from synthetic resins or natural polymer compounds as the main raw materials through a series of processes such as plasticizing, molding, and curing. After the plastic product is shaped, it needs to be heat-dried. The drying device can effectively remove residual moisture or volatile solvents from the inside of the plastic product, preventing the product from deforming, bubbling, or generating internal stress due to moisture evaporation, thereby ensuring that the plastic product can maintain the appropriate shape and dimensional accuracy required by the design.

[0003] A drying device for plastic product manufacturing described in the prior art includes a box body, a box door, a heating plate, an ultraviolet lamp holder, and a heat conduction cylinder. The left side of the front of the box body is movably connected to the left side of the box door via a pivot pin, and the outer side of the heating plate is fixedly connected to both sides of the inner wall of the box body.

[0004] While the aforementioned technologies can initially filter the exhaust gas containing VOCs and plastic dust generated during the drying process, intercepting solid particulate matter in the exhaust gas and reducing the content of pollutants directly emitted, their drying efficiency and automation level still have certain limitations in actual production. The feeding and discharging links often require manual assistance, which not only increases labor costs but also reduces production efficiency. At the same time, the lack of an effective conveying and linkage structure further limits the improvement of drying efficiency. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a hot drying processing line for plastic products to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A heat-drying processing line for plastic products includes a drying chamber and conveyor belts for feeding and discharging. The drying chamber has feeding ports on both side walls. Overlapping grooves for placing two conveyor belts are formed on the bottom walls of the feeding ports on both sides of the drying chamber. Lifting sealing plates are slidably installed on the outer side walls of the drying chamber at the feeding ports. A turntable is embedded in the center of the inner bottom wall of the drying chamber. Each overlapping groove has a locking groove on its wall, and each locking groove contains an auxiliary fixing component for securing the conveyor belt. Movable cavities are formed on both sides of the turntable at the inner bottom of the drying chamber. Pushing components are provided in both movable cavities. Each pushing component is used to cooperate with the descent of the sealing plate to achieve docking, and after heat drying, pushes the plastic products from the turntable onto the discharge conveyor belt.

[0007] Specifically, in this technical solution, a drive motor is installed at the bottom of the drying box below the turntable. The lower surface of the turntable is fixed to the output end of the drive motor with screws. Both conveyor belts are set on the conveyor frame, and one end of each of the two conveyor frames is located in the corresponding overlapping groove. The upper surfaces of both conveyor belts are flush with the upper surface of the turntable.

[0008] Specifically, in this technical solution, the pushing component includes a push plate and two movable plates. The push plate is arranged parallel to the sealing plate. The two movable plates are slidably installed in their respective movable cavities. Each of the two movable cavities has a movable through groove on its top. Each of the two movable plates has a vertical rod fixed to its top. Both vertical rods pass through the corresponding movable through groove and slide in contact with the groove wall.

[0009] Specifically, in this technical solution, both ends of the push plate are provided with through holes, and both through holes are matched with the corresponding vertical rods. Electric telescopic cylinders are symmetrically installed on the bottom of one side of the outer wall of the drying oven. The telescopic ends of the two electric telescopic cylinders extend through the oven wall into the movable cavity and are fixed with the corresponding movable plate screws.

[0010] Specifically, in this technical solution, telescopic rods are symmetrically installed on the outer wall of one of the sealing plates. The telescopic ends of both telescopic rods extend through the sealing plate to the inner wall of the drying chamber and are fixed with push plate screws. Both ends of the push plate near the sealing plate are fixed with abutment rods, and the ends of both abutment rods are in contact with the inner wall of the drying chamber.

[0011] Specifically, the top two sides of the drying oven are provided with horizontal crossbars, and vertical connecting rods are fixed at both ends of the lower surface of the two crossbars. The bottom end of each connecting rod is fixedly connected to both ends of the upper surface of the corresponding sealing plate. The two crossbars are fixedly connected by a lifting plate. A hydraulic cylinder is installed at the center of the top of the drying oven by bolts, and the telescopic end of the hydraulic cylinder is fixed to the lower surface of the lifting plate with screws.

[0012] Specifically, in this technical solution, high-temperature resistant sealing strips are bonded to the parts of the two sealing plates that contact the outer wall of the drying chamber, and the bottom ends of the two sealing plates are matched with the corresponding conveyor belt surfaces.

[0013] Specifically, the auxiliary fixing component includes a plug-in block. Horizontal guide rods are fixed to the top and bottom of the side of the plug-in block away from the conveyor frame. The ends of the two guide rods extend through the wall of the locking groove to the outside of the drying chamber. Handles are fixed to the ends of the two guide rods. A support spring is provided between the two guide rods. The two ends of the support spring are fixedly connected to the outer wall of the plug-in block and the wall of the locking groove, respectively.

[0014] Specifically, in this technical solution, both sides of the conveyor frame are provided with insertion holes that match the insertion blocks. The outer wall of the insertion block slides in contact with the groove wall of the locking groove, and the rod wall of the guide rod slides in fit with the inner wall of the through-hole of the locking groove.

[0015] Specifically, in this technical solution, heaters are installed on both inner walls of the drying oven, and the two heaters are symmetrically distributed on both sides of the turntable.

[0016] In summary, the present invention has the following advantages: Through the structural design of the feeding and discharging conveyor belts with overlapping grooves, the automated feeding and discharging of plastic products in the hot drying process is realized, eliminating the need for manual operation, greatly reducing labor costs, and significantly improving production efficiency. At the same time, by leveraging the linkage between the sealing plate and the pushing component, and the rotation of the turntable, a complete linkage structure of feeding-hot drying-discharging is constructed. Combined with symmetrically distributed heaters, the drying efficiency is effectively improved, solving the limitations of the prior art in terms of limited drying efficiency and lack of effective conveying and linkage structure, ensuring that plastic products can be hot dried quickly and uniformly. Meanwhile, the coordinated design of the push plate, abutment rod, and telescopic rod not only ensures the stability of the material pushing process and avoids scratching the surface of plastic products, but also allows the telescopic rod to adapt to plastic products of different sizes, further enhancing its practicality. Furthermore, the auxiliary fixing components not only achieve a stable connection between the conveyor belt and the drying box, preventing the conveyor belt from shifting or shaking during operation and ensuring the stability of plastic products during transfer, but also enable the quick installation and disassembly of the conveyor belt through the cooperation of the guide rod, support spring, and plug-in block, reducing the difficulty of equipment maintenance and repair. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the isometric structure of the drying oven of the present invention; Figure 2 This is a top view cross-sectional structural diagram of the drying oven of the present invention; Figure 3 This is a schematic cross-sectional view of the auxiliary fixing component of the present invention; Figure 4 This is a schematic diagram of the main cross-sectional structure of the drying oven of the present invention; Figure 5 This is an isometric cross-sectional view of the pusher plate linkage structure of the present invention; Figure 6 This is a schematic diagram of the pushing component structure of the present invention.

[0018] Figure Descriptions: 1. Drying box; 102. Feed inlet; 103. Overlap groove; 104. Turntable; 105. Heater; 106. Locking groove; 107. Movable cavity; 1071. Moving through groove; 108. Hydraulic cylinder; 2. Conveyor frame; 201. Conveyor belt; 3. Sealing plate; 301. Connecting rod; 3011. Crossbar; 302. Lifting plate; 4. Auxiliary fixing assembly; 401. Insertion block; 402. Support spring; 403. Guide rod; 404. Handle; 5. Pushing assembly; 501. Telescopic rod; 502. Push plate; 5021. Abutment rod; 5022. Perforation; 503. Electric telescopic cylinder; 504. Movable plate; 5041. Vertical rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] The embodiments of the present invention will now be described.

[0021] It should be noted that all electrical components in drying oven 1 are electrically connected to the main control system of the hot drying processing line. The main control system coordinates and controls the operating sequence and parameters of each component to ensure precise coordination of each step.

[0022] In this embodiment, please refer to Figure 1 - Figure 6As shown, a heat drying line for plastic products includes a drying chamber 1 and conveyor belts 201 for feeding and discharging. Both side walls of the drying chamber 1 have feeding ports 102 to ensure smooth feeding and discharging of plastic products. Both sides of the drying chamber 1 have overlapping grooves 103 at the bottom wall of the feeding ports 102 for placing two conveyor belts 201. The depth of the overlapping grooves 103 matches the thickness of the conveyor frame 2. Both conveyor belts 201 are mounted on the conveyor frame 2, and one end of each conveyor frame 2 is located in the corresponding overlapping groove 103. Lifting seals are slidably installed on the outer side walls of the drying chamber 1 at the feeding ports 102. Plate 3 and slide rail are vertically fixed to the outer wall of the drying chamber 1. The back of sealing plate 3 is slidably connected to the slide rail to ensure smooth lifting and lowering of sealing plate 3. High-temperature resistant sealing strips are adhered to the parts of both sealing plates 3 that contact the outer wall of the drying chamber 1. The bottom ends of both sealing plates 3 match the surface of the corresponding conveyor belt 201, which can completely seal the material inlet 102 and reduce heat loss inside the chamber. In addition, a turntable 104 is embedded in the center of the inner bottom wall of the drying chamber 1. The turntable 104 is made of wear-resistant and high-temperature resistant plastic material. A sealing gasket is provided between its edge and the groove wall of the mounting groove to prevent heat loss from the chamber through the gap. The two conveyor belts 201 The upper surfaces of both sides are flush with the upper surface of the turntable 104, ensuring smooth transfer of plastic products between the conveyor belt 201 and the turntable 104, avoiding jamming or falling. Heaters 105 are installed on both inner walls of the drying chamber 1, symmetrically distributed on both sides of the turntable 104. The heaters 105 use infrared heating tubes, providing high heating efficiency and uniform heating, allowing for all-around heat treatment of the plastic products on the turntable 104. A drive motor is installed at the bottom of the drying chamber 1, below the turntable 104. A high-temperature resistant protective shell is fitted around the drive motor to prevent heat from the chamber from affecting its normal operation. The lower surface of the disc 104 is fixed to the output end of the drive motor with screws. The drive motor can drive the turntable 104 to rotate slowly and evenly to ensure that the plastic products are heated evenly. Each overlapping groove 103 has a locking groove 106 on its groove wall. Each locking groove 106 is provided with an auxiliary fixing component 4 for fixing the conveyor belt 201. The bottom of the drying box 1 is provided with movable cavities 107 on both sides of the turntable 104. Each movable cavity 107 is provided with a pushing component 5. Each pushing component 5 is used to cooperate with the descent of the sealing plate 3 to achieve docking and push the plastic products from the turntable 104 to the discharge conveyor belt 201 after heat drying. The pushing component 5 includes a push plate 502 and two movable plates 504. The push plate 502 is made of high-temperature resistant plastic and is arranged parallel to the sealing plate 3. The two movable plates 504 are slidably installed in their respective movable cavities 107. Each of the two movable cavities 107 has a movable through groove 1071 on its top. The length of the movable through groove 1071 is adapted to the pushing stroke of the push plate 502. A vertical rod 5041 is fixed to the top of each of the two movable plates 504. Both vertical rods 5041 pass through the corresponding movable through groove 1071 and slide in contact with the groove wall. Both ends of the push plate 502 have through holes 5022, which match the corresponding vertical rods 5041. The vertical rods 5041 can be inserted into the through holes 5022, realizing the docking and transmission between the push plate 502 and the movable plates 504 for drying. Electric telescopic cylinders 503 are symmetrically installed on the bottom of one side of the outer wall of the box 1. The telescopic ends of the two electric telescopic cylinders 503 extend through the box wall of the drying box 1 into the movable cavity 107 and are fixed with screws to the corresponding movable plate 504. The electric telescopic cylinders 503 can drive the movable plate 504 to slide horizontally along the movable cavity 107. Telescopic rods 501 are symmetrically installed on the outer wall of a sealing plate 3. The telescopic ends of the two telescopic rods 501 extend through the sealing plate 3 into the inner wall of the drying box 1 and are fixed with screws to the push plate 502. Their telescopic direction is consistent with the pushing direction of the push plate 502. The push plate 502 has abutment rods 5021 fixed at both ends on the side of the push plate 502 near the sealing plate 3. The ends of the two abutment rods 5021 are in contact with the inner wall of the drying box 1, which plays a limiting role and prevents the push plate 502 from colliding with the sealing plate 3 when it resets. The top of the drying oven 1 is provided with horizontal crossbars 3011 on both sides. Vertical connecting rods 301 are fixed at both ends of the lower surface of the two crossbars 3011. The connecting rods 301 and the crossbars 3011 are integrally formed. The bottom end of each connecting rod 301 is fixedly connected to both ends of the upper surface of the corresponding sealing plate 3. The two crossbars 3011 are fixedly connected by a lifting plate 302. A hydraulic cylinder 108 is installed at the center of the top of the drying oven 1 by bolts. The telescopic end of the hydraulic cylinder 108 is fixed to the lower surface of the lifting plate 302 with screws. The hydraulic cylinder 108 can drive the lifting plate 302 to move up and down, thereby driving the two sealing plates 3 to rise and fall synchronously.

[0023] During the hot drying process of plastic products, the plastic products after plastic processing are smoothly conveyed to the turntable 104 inside the drying chamber 1 by the feeding conveyor belt 201. Then, the main control system controls the hydraulic cylinder 108 to start, driving the lifting plate 302 and the crossbar 3011 to move down. The two sealing plates 3 are lowered synchronously through the connecting rod 301 until the bottom of the sealing plate 3 is tightly attached to the surface of the conveyor belt 201. At this time, the high-temperature resistant sealing strip completely blocks the feed port 102, reducing heat loss inside the chamber. Subsequently, the heaters 105 on both sides start to work, heating the plastic products on the turntable 104. At the same time, the drive motor (not shown in the figure) drives the turntable 104 to rotate slowly and uniformly, ensuring that the plastic products are heated evenly on all sides. During the downward movement of the sealing plate 3, the push plate 502 is also driven to move down synchronously through the telescopic rod 501. During the downward movement of the push plate 502, the two perforations 5022 will fit onto the corresponding vertical rod 5041, realizing the precise docking of the push plate 502 and the movable plate 504. During the hot drying process, the main control system monitors the temperature inside the drying chamber 1 in real time. When the preset temperature is reached, the heater 105 is controlled to maintain a constant temperature. After the plastic products have completed the hot drying process for the preset time, the main control system controls the heater 105 to stop working and simultaneously starts the electric telescopic cylinder 503. Its telescopic end pushes the movable plate 504 to slide along the movable cavity 107 towards the turntable 104. The movable plate 504 drives the push plate 502 to move synchronously through the vertical rod 5041. The push plate 502 smoothly pushes the plastic products on the turntable 104 onto the discharge conveyor belt 201. After the push is completed, the electric telescopic cylinder 503 drives the movable plate 504 to reset. The push plate 502 returns to the initial position synchronously under the action of the telescopic rod 501. The abutment rod 5021 will abut against the inner wall of the drying chamber 1. Then the hydraulic cylinder 108 drives the sealing plate 3 to rise and open the feed port 102, waiting for the next batch of plastic products to enter. This achieves automated feeding and discharging of plastic products during heat drying, eliminating the need for manual operation, significantly reducing labor costs, and greatly improving production efficiency. Simultaneously, the linkage between the sealing plate 3 and the pushing component 5, along with the rotation of the turntable 104, constructs a complete linkage structure for feeding, heat drying, and discharging, effectively improving drying efficiency. This overcomes the limitations of existing technologies, such as limited drying efficiency and a lack of effective conveying and linkage structures, ensuring that plastic products can be heat dried quickly and uniformly. Furthermore, the coordinated design of the push plate 502, the abutment rod 5021, and the telescopic rod 501 not only ensures the stability of the pushing process and prevents scratching the surface of the plastic products, but also allows the telescopic rod 501 to adapt to plastic products of different sizes, further enhancing practicality.

[0024] Please see Figure 3As shown, the auxiliary fixing component 4 includes a plug-in block 401, which is made of hard alloy. The end of the plug-in block 401 near the conveyor frame 2 has a rounded chamfer for easy insertion into the insertion hole of the conveyor frame 2. Horizontal guide rods 403 are fixed to the top and bottom of the side of the plug-in block 401 away from the conveyor frame 2. The ends of both guide rods 403 extend through the wall of the locking groove 106 to the outside of the drying chamber 1. Handles 404 are fixed to the ends of both guide rods 403. The surface of the handles 404 has anti-slip textures for easy gripping and operation. A support spring 402 is provided between the two guide rods 403. The two ends of the support spring 402 are fixedly connected to the outer wall of the plug block 401 and the groove wall of the locking groove 106, respectively. Both sides of the conveyor frame 2 are provided with plug holes that match the plug block 401. The outer wall of the plug block 401 slides in contact with the groove wall of the locking groove 106. The rod wall of the guide rod 403 slides in cooperation with the inner wall of the through-hole of the locking groove 106. Through the elastic force of the support spring 402, the plug block 401 can be pushed into the plug hole of the conveyor frame 2 to achieve quick fixation of the conveyor frame 2. Pulling the handle 404 can drive the plug block 401 out of the plug hole, which is convenient for disassembly and adjustment of the conveyor frame 2.

[0025] When it is necessary to disassemble and maintain the drying box 1 from the hot drying processing line, the operator only needs to pull the handles 404 on both sides by hand. The handles 404 drive the guide rod 403 to slide outward along the through-hole of the locking groove 106. At this time, the support spring 402 is compressed, and the plug block 401 moves into the locking groove 106 in sync with the guide rod 403 until the plug block 401 is completely disengaged from the plug holes on both sides of the conveyor frame 2. At this time, the fixed relationship between the conveyor frame 2 and the drying box 1 is released, and the operator can take out the drying box 1 to complete the separation of the drying box 1 from the conveyor belt 201. During installation, simply place one end of the conveyor frame 2 into the overlap groove 103, loosen the handle 404, allow the support spring 402 to return to its original shape, and push the insertion block 401 back into the insertion hole of the conveyor frame 2 to achieve quick fixation of the two. This not only ensures a stable connection between the conveyor belt 201 and the drying box 1, preventing the conveyor belt 201 from shifting or shaking during operation and ensuring the stability of plastic products during transfer, but also enables quick installation and disassembly of the drying box 1, reducing the difficulty of equipment maintenance and repair.

[0026] The working principle of this invention is as follows: During the hot drying process of plastic products, the plastic products after plastic processing are smoothly conveyed to the turntable 104 in the drying box 1 by the feeding conveyor belt 201. Then, the main control system will control the hydraulic cylinder 108 to start, driving the lifting plate 302 and the crossbar 3011 to move down. The two sealing plates 3 will descend synchronously through the connecting rod 301 until the bottom of the sealing plate 3 is tightly attached to the surface of the conveyor belt 201. At this time, the high temperature resistant sealing strip completely blocks the feed port 102. Subsequently, the heaters 105 on both sides start to work to heat the plastic products on the turntable 104. At the same time, the drive motor (not shown in the figure) drives the turntable 104 to rotate slowly and uniformly to ensure that the plastic products are heated evenly on all sides. During the downward movement of the sealing plate 3, the push plate 502 will also be driven to move down synchronously through the telescopic rod 501. During the downward movement of the push plate 502, the two perforations 5022 will be fitted onto the corresponding vertical rods 5041. During the hot drying process, the main control system monitors the temperature inside the drying chamber 1 in real time. When the preset temperature is reached, the heater 105 is controlled to maintain a constant temperature. After the plastic products have completed the hot drying process for the preset time, the main control system controls the heater 105 to stop working and simultaneously starts the electric telescopic cylinder 503. Its telescopic end pushes the movable plate 504 to slide along the movable cavity 107 towards the turntable 104. The movable plate 504 drives the push plate 502 to move synchronously through the vertical rod 5041. The push plate 502 smoothly pushes the plastic products on the turntable 104 onto the discharge conveyor belt 201. After the push is completed, the electric telescopic cylinder 503 drives the movable plate 504 to reset. The push plate 502 returns to the initial position synchronously under the action of the telescopic rod 501. The abutment rod 5021 will abut against the inner wall of the drying chamber 1. Then, the hydraulic cylinder 108 drives the sealing plate 3 to rise and open the feed port 102, waiting for the next batch of plastic products to enter.

[0027] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A heat drying processing line for plastic products, comprising a drying chamber (1) and a conveyor belt (201) for feeding and discharging, characterized in that, The drying box (1) has material inlets (102) on both sides of its side walls. Overlap grooves (103) for placing two conveyor belts (201) are provided on the bottom walls of the material inlets (102) on both sides of the drying box (1). Lifting sealing plates (3) are slidably installed on the outer side walls of the drying box (1) at the material inlets (102). A turntable (104) is embedded in the center of the inner bottom wall of the drying box (1). Each overlap groove (103) has a locking groove (104) on its groove wall. 06), each of the locking slots (106) is provided with an auxiliary fixing component (4) for fixing the conveyor belt (201). The bottom of the drying box (1) is provided with movable cavities (107) on both sides of the turntable (104). Each of the two movable cavities (107) is provided with a pushing component (5). Each pushing component (5) is used to cooperate with the descent of the sealing plate (3) to achieve docking, and after hot drying, push the plastic product from the turntable (104) onto the discharge conveyor belt (201).

2. The heat drying line for plastic products according to claim 1, characterized in that, The bottom of the drying box (1) is located below the turntable (104) and a drive motor is installed. The lower surface of the turntable (104) is fixed to the output end of the drive motor with screws. The two conveyor belts (201) are both set on the conveyor frame (2). One end of the two conveyor frames (2) is located in the corresponding overlapping groove (103). The upper surfaces of the two conveyor belts (201) are flush with the upper surface of the turntable (104).

3. The heat drying line for plastic products according to claim 1, characterized in that, The pushing component (5) includes a push plate (502) and two movable plates (504). The push plate (502) is arranged parallel to the sealing plate (3). The two movable plates (504) are slidably installed in the corresponding movable cavities (107). The top of each of the two movable cavities (107) is provided with a movable through groove (1071). The top of each of the two movable plates (504) is fixed with a vertical rod (5041). The two vertical rods (5041) pass through the corresponding movable through groove (1071) and slide in contact with the groove wall.

4. A heat drying processing line for plastic products according to claim 3, characterized in that, Both ends of the push plate (502) are provided with through holes (5022), and both through holes (5022) are matched with the corresponding vertical rods (5041). Electric telescopic cylinders (503) are symmetrically installed on the bottom of one side of the outer wall of the drying box (1). The telescopic ends of the two electric telescopic cylinders (503) extend through the box wall of the drying box (1) into the movable cavity (107) and are fixed with screws to the corresponding movable plate (504).

5. A heat-drying processing line for plastic products according to claim 3, characterized in that, A telescopic rod (501) is symmetrically installed on the outer wall of one of the sealing plates (3). The telescopic ends of the two telescopic rods (501) extend through the sealing plate (3) to the inner wall of the drying box (1) and are fixed with screws on the push plate (502). Both ends of the push plate (502) near the sealing plate (3) are fixed with abutment rods (5021). The ends of the two abutment rods (5021) are in contact with the inner wall of the drying box (1).

6. A heat-drying processing line for plastic products according to claim 1, characterized in that, The top two sides of the drying box (1) are provided with horizontal crossbars (3011). The two ends of the lower surface of the two crossbars (3011) are fixed with vertical connecting rods (301). The bottom end of each connecting rod (301) is fixedly connected to the two ends of the upper surface of the corresponding sealing plate (3). The two crossbars (3011) are fixedly connected by a lifting plate (302). A hydraulic cylinder (108) is installed at the center of the top of the drying box (1) by bolts. The telescopic end of the hydraulic cylinder (108) is fixed with screws on the lower surface of the lifting plate (302).

7. A heat drying processing line for plastic products according to claim 1, characterized in that, High-temperature resistant sealing strips are bonded to the parts of the two sealing plates (3) that come into contact with the outer wall of the drying box (1), and the bottom ends of the two sealing plates (3) are matched with the surface of the corresponding conveyor belt (201).

8. A heat drying processing line for plastic products according to claim 2, characterized in that, The auxiliary fixing component (4) includes a plug-in block (401). The top and bottom of the side of the plug-in block (401) away from the conveyor frame (2) are fixed with horizontal guide rods (403). The ends of the two guide rods (403) extend through the wall of the locking groove (106) to the outside of the drying box (1). The ends of the two guide rods (403) are fixed with handles (404). A support spring (402) is provided between the two guide rods (403). The two ends of the support spring (402) are fixedly connected to the outer wall of the plug-in block (401) and the wall of the locking groove (106) respectively.

9. A heat-drying processing line for plastic products according to claim 8, characterized in that, The two sides of the conveyor frame (2) are provided with insertion holes that match the plug-in block (401). The outer wall of the plug-in block (401) slides in contact with the groove wall of the locking groove (106), and the rod wall of the guide rod (403) slides in cooperation with the inner wall of the through-hole of the locking groove (106).

10. A heat drying line for plastic products according to claim 1, characterized in that, Heaters (105) are installed on both inner walls of the drying box (1), and the two heaters (105) are symmetrically distributed on both sides of the turntable (104).

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