A device for the heat sealing production of PET foam

Abstract

This invention relates to the field of foam material processing technology, and provides a heat-sealing processing production device for PET foam material, comprising: a frame, with two outer shells connected to the middle of the frame via a lifting assembly; a heating plate is provided on one side of each outer shell for heat-sealing the PET foam material; and insulation components are provided on both sides of the heating plate for heat-insulating the molten surface of the foam material with hot air after the heat-sealing process is completed. By continuously blowing constant-temperature, low-pressure hot air onto the high-temperature molten surface of the PET foam material immediately after the heat-sealing process is completed and the heating plate is removed, direct contact between the external low-temperature cold air and the molten surface is effectively blocked, avoiding problems such as instantaneous cooling of the molten surface, sudden increase in melt viscosity, and loss of adhesive properties. This significantly reduces the generation of false welds and weak molten layers, lowers the risk of cracking of the heat-sealed seam during subsequent pressure holding and cooling processes, and greatly improves the heat-sealing yield and finished product quality in low-temperature winter environments.

Description

Technical Field

[0001] This invention relates to the field of foam material processing technology, specifically to a heat-sealing processing apparatus for PET foam material. Background Technology

[0002] The core material of wind turbine blades largely uses PET foam, and the sheets are spliced ​​together using a hot-melt bonding process. The principle of hot-melt bonding is to use a high-temperature heating plate to melt the foam end faces, and then quickly join and pressurize the foam after removing the heating plate to achieve glue-free fusion.

[0003] In low-temperature production environments during winter, a common technical challenge exists in the industry: after the heating plate is removed after heating, a large amount of cold air rushes into the space it creates. This cold air directly impacts the end face of the molten PET foam, causing a sudden drop in the temperature of the molten surface, a sharp increase in melt viscosity, and loss of adhesive properties, resulting in false welds and weak melt layers. Subsequent pressure holding and cooling processes generate shrinkage stress, which can easily cause cracks in the heat-sealed seam, leading to product scrap and a significant decrease in yield. Therefore, a heat-sealing processing device for PET foam materials is needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a heat-sealing processing production device for PET foam materials, which solves the problem that after the heating plate is removed after heating, a large amount of low-temperature cold air will rush into the space freed up by the heating plate, causing the heat-sealing seam to crack, resulting in product scrap and a significant decrease in yield.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A heat-sealing processing apparatus for PET foam material, comprising: The frame has two outer shells connected at its middle end via a lifting assembly. Each outer shell has a heating plate on one side away from the other for hot-melting with PET foam material. The heating plate has heat-insulating components on both sides for keeping the molten surface of the foam material warm with hot air after the hot-melting process is completed, preventing cold air from causing the molten surface to cool prematurely and affecting the bonding of the two foam materials. The base frame consists of two base frames, which are fixedly connected to the top two ends of the machine frame. A clamping cover slides vertically on the top side of the base frame. The side of the base frame close to the clamping cover serves as the feeding area for placing foam material that needs to be heat-sealed. The feeding areas on both sides push the foam material together through a pushing component, so that their molten surfaces are joined and heat-sealed. The housing frame comprises four housing frames, two of which are fixedly connected to the front and rear sides of the frame, respectively. The top of each housing frame is connected to a connecting frame via a push-pull assembly. The top of the connecting frame is connected to a push assembly. Lifting assemblies are provided at both ends of the connecting frame. A trigger assembly is provided on the adjacent side of two adjacent housing frames. The push-pull assembly and the trigger assembly are connected via a lever. The middle end of the lever is rotatably connected to the housing frame.

[0006] Preferably, the lifting assembly includes a lifting frame, the bottom end of which is connected to the frame via an electric guide rail, a deflection frame rotatably connected to the top end of the lifting frame, an outer shell fixedly connected to the inner wall of the deflection frame, a guide frame fixedly connected to the side of the outer shell away from the lever, the bottom end of the lifting frame being connected to the frame via an electric guide rail for lifting operations, and a guide protrusion fixedly connected to the bottom end of the deflection frame, the guide protrusion slidingly abutting against the arc-shaped guide groove of the guide frame.

[0007] Preferably, the insulation component includes two air inlet pipes, which are fixedly connected to the side of the outer shell away from the heating plate. The inner cavity of the outer shell is separated from the installation area of ​​the heating plate by a partition and the air duct for hot air circulation. The outlet of the air duct faces the foam material in the feeding area, and the inlet of the air duct is connected to the air inlet pipes.

[0008] Preferably, the input ends of the two air inlet pipes are fixedly connected to insulated hoses, and the input ends of the insulated hoses are externally connected to air supply elements equipped with heating and filtration functions.

[0009] Preferably, the pushing assembly includes a pushing frame slidably connected to the bottom end of the base frame. Two abutment pieces slide vertically on the top side of the pushing frame. The abutment pieces are threadedly connected to the adjusting bolts rotatably connected to the bottom end of the pushing frame to adjust the horizontal height of the abutment pieces. This, in conjunction with multiple rolling rollers rotatably connected to the bottom end of the clamping cover, forms a clamping state. The bottom side of the pushing frame is fixedly connected to the middle end of the connecting frame.

[0010] Preferably, the push-pull assembly includes two pull slides located on both sides of the base frame. The middle end of the pull slide is slidably connected to the frame, and one end of the pull slide is fixedly connected to the connecting frame. A push-pull frame is horizontally slidable at the top of the outer casing frame. One end of the push-pull frame is fixedly connected to the connecting frame, and the other end of the push-pull frame slides against the guide groove at the top of the lever.

[0011] Preferably, the bottom end of the pull carriage is connected to the frame via a spring telescopic rod for resetting.

[0012] Preferably, the lifting cover assembly includes a sliding head slidably connected to the other end of the pulling slide, the sliding head and the sliding connection portion of the pulling slide are provided with a sliding limit, the top end of the sliding head is rotatably connected to a connecting rod, and the connecting rod is rotatably connected to the outer wall of the clamping cover.

[0013] Preferably, the triggering assembly includes two trigger heads fixedly connected to the front and rear sides of the lifting frame, and two trigger frames rotatably connected to the front and rear sides of the bottom center of the frame via torsion springs. A trigger wheel is rotatably connected to the top of the trigger frame, and a traction frame slides horizontally at the bottom of the outer casing frame. The traction frame is connected to the trigger wheel.

[0014] Preferably, one end of the traction frame slides against the guide groove at the bottom of the lever, and the other end of the traction frame slides against the protrusion on one side of the trigger wheel through the guide groove.

[0015] Working principle: First, place the foam material to be heat-sealed into the feeding area on the side of the base frame and the clamping cover, with the side to be heat-sealed facing the heating plate. Then, turn the adjusting bolt on the bottom side of the push frame to move the abutment piece on the top side upward and press against the bottom side of the foam material, so that the foam material is clamped by the top side rolling roller and the bottom side abutment piece. Then, start the heating unit of the heating plate to heat-melt the heat-sealing surface of the foam material, so that the surface becomes molten and adhesive. When the heating plate on the outer shell has completed the heat-melting process and is ready to be detached, the external air supply element is activated. The air in the air tank of the air supply element is heated by the constant temperature heating element, and filtered by the oil-water separator and air filter. After the solenoid valve is opened, the air enters the air duct inside the outer shell through the heat-insulating hose and the air inlet pipe. The heat-insulating hose keeps the air warm throughout the process. The hot air overflows from the air outlet of the air duct in a low-pressure and non-impact manner, raising the ambient temperature to a state where the heat-sealing surface of the foam material cannot be cooled, thus preventing cold air from affecting the heat-sealing surface. Subsequently, under the conveying of the electric guide rail, the lifting frame moves downward, causing the heat-sealing surface of the foam material to gradually detach from the heating plate. The deflection frame follows the lifting frame as it descends. As the heating plate detaches from the heat-sealing surface, the guide protrusions on the deflection frame, guided by the arc-shaped guide groove of the guide frame, cause the deflection frame to deflect along the track of the arc-shaped guide groove. This causes one side of the outer shell and the air outlet of the air duct to gradually face upward and finally tend to be horizontal. Hot air continues to overflow from the air outlet, forming an insulation zone to insulate the molten surface of the foam material. As the deflection frame changes its attitude, the trigger head at the bottom of the lifting frame comes into contact with the trigger wheel at the bottom of the frame, causing the trigger frame connected to the trigger wheel to deflect and compress the torsion spring used for reset. The trigger wheel is driven by the deflection of the trigger frame, and its position changes. Through the guide groove on the traction frame, the traction frame is moved, causing the bottom end of the lever to be moved synchronously, causing its top end to pull the push-pull frame, and the connecting frame connected to the push-pull frame to move. The pusher connected to the connecting frame is displaced, causing the pusher to work with the abutment plate on the top side to push the clamped foam material. The bottom side of the foam material and the abutment plate generate sufficient friction. The top side of the foam material is freed from the clamping force, and the friction force generated by the displacement is converted into the torque force of the rolling roller, causing the foam material to be displaced. After the foam materials at both ends are displaced, their corresponding hot melt surfaces are joined together, and the two pieces of foam material are heat-sealed. During the docking process, the end of the slide is pulled to slide on the sliding head. At the same time as docking is completed, the end of the slide is pulled to the end at the sliding head, and the sliding head is displaced. The displaced sliding head supports the clamping cover through the connecting rod at the top, causing the clamping cover to move upward and release the clamping of the foam material. Then the foam material that has completed the heat sealing process is taken out from one side, and the next set of two pieces of foam material that need to be heat sealed is loaded. The above operation is repeated.

[0016] This invention provides a heat-sealing processing apparatus for PET foam materials. It has the following beneficial effects: 1. This invention, after the heating plate completes the hot-melt process and is removed, can immediately and continuously blow constant-temperature low-pressure hot air onto the high-temperature molten surface of PET foam material, effectively blocking direct contact between external low-temperature cold air and the molten surface, avoiding problems such as instantaneous cooling of the molten surface, sudden increase in melt viscosity, and loss of adhesive performance. This significantly reduces the generation of false welds and weak molten layers, lowers the risk of cracking of the heat-sealing seam during subsequent pressure holding and cooling processes, and greatly improves the heat-sealing yield and finished product quality in low-temperature winter environments.

[0017] 2. In this invention, as the lifting frame descends under the drive of the electric guide rail, the guide protrusion at the bottom of the deflection frame slides along the arc-shaped guide groove of the guide frame, so that one side of the outer shell and the air outlet of the air duct gradually faces upward and eventually tends to a horizontal posture, ensuring that the hot air outlet always faces the melting surface of the foam material. Even after the heating plate is completely withdrawn, a stable heat preservation area can still be formed, achieving all-round continuous heat preservation of the melting surface, further ensuring the bonding reliability of the heat-sealed surface.

[0018] 3. This invention mechanically links the descent of the lifting frame with the pushing action of the foam material. During the descent of the lifting frame, the trigger head abuts against the trigger wheel, and the lever is deflected by the trigger frame and the traction frame, which in turn drives the push-pull frame and the connecting frame to move, and finally drives the push frame to complete the docking and merging of the two pieces of foam material. The entire pushing process does not require an additional drive power source, which simplifies the equipment structure and reduces energy consumption and manufacturing costs. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the guide frame of the present invention; Figure 4 This is a schematic diagram of the connection structure of the air inlet duct of the present invention; Figure 5 This is a schematic diagram of the air duct structure of the present invention; Figure 6 This is a schematic diagram of the connection structure of the trigger wheel of the present invention; Figure 7 This is a schematic diagram of the lever connection structure of the present invention; Figure 8 This is a schematic diagram of the connecting frame of the present invention; Figure 9 This is a schematic diagram showing the position of the rolling roller of the present invention; Figure 10 This is a schematic diagram showing the position of the adjusting bolt of the present invention; Figure 11 This is a schematic diagram of the connecting structure of the linkage of the present invention; Figure 12 This is a schematic diagram of the pull carriage and sliding head of the present invention.

[0020] The components are as follows: 1. Frame; 2. Lifting frame; 3. Deflection frame; 4. Outer shell; 5. Heating plate; 6. Air duct; 7. Air inlet pipe; 8. Insulated hose; 9. Guide frame; 10. Guide protrusion; 11. Outer shell frame; 12. Trigger frame; 13. Trigger wheel; 14. Pull frame; 15. Push-pull frame; 16. Lever; 17. Trigger head; 18. Base frame; 19. Push frame; 20. Connecting frame; 21. Adjusting bolt; 22. Clamping cover; 23. Rolling roller; 24. Pulling slide; 25. Sliding head; 26. Connecting rod; 27. Spring telescopic rod; 28. Electric guide rail; 29. ​​Abutment plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example: This invention provides a heat-sealing processing apparatus for PET foam material, comprising: Please see the appendix Figure 1 -Appendix Figure 3 The machine frame 1 has two outer shells 4 connected to its middle end via a lifting assembly. A heating plate 5 is provided on the opposite side of the outer shell 4 for hot-melting processing with PET foam material. Insulation components are provided on both sides of the heating plate 5 to keep the melted surface of the foam material warm by hot air after the hot-melting process is completed, so as to prevent the melted surface from cooling prematurely due to external cold air, which would affect the bonding of the two foam materials. The lifting assembly includes a lifting frame 2. The bottom end of the lifting frame 2 is connected to the machine frame 1 via an electric guide rail 28. A deflection frame 3 is rotatably connected to the top end of the lifting frame 2. The outer shell 4 is fixedly connected to the inner wall of the deflection frame 3. A guide frame 9 is fixedly connected to the side of the outer shell 11 away from the lever 16. The bottom end of the lifting frame 2 is connected to the machine frame 1 via an electric guide rail 28 for lifting operations. A guide protrusion 10 is fixedly connected to the bottom end of the deflection frame 3. The guide protrusion 10 slides against the arc-shaped guide groove of the guide frame 9. Specifically, the electric heating element of the heating plate 5 and the electric guide rail 28 are connected to the control terminal through an external circuit, and are controlled by the control terminal. The foam material to be heat-sealed is placed in the feeding area on the side of the base frame 18 and the clamping cover 22, with the side to be heat-sealed facing the heating plate 5. Then, the adjusting bolt 21 on the bottom side of the push frame 19 is turned, causing the abutment piece 29 on its top side to move upward and press against the bottom side of the foam material, so that the foam material is clamped by the top side rolling roller 23 and the bottom side abutment piece 29. Then, the heating unit of the heating plate 5 is activated to heat-melt the heat-sealing surface of the foam material, making its surface molten and adhesive. Under the conveying of the electric guide rail 28, the lifting frame 2 moves downward, causing the heat-sealing surface of the foam material to gradually detach from the heating plate 5. The deflection frame 3 follows the lifting frame 2 and descends. As the heating plate 5 detaches from the heat-sealing surface, the guide protrusion 10 on the deflection frame 3 is guided by the arc-shaped guide groove of the guide frame 9, causing the deflection frame 3 to deflect along the track of the arc-shaped guide groove, so that the side of the outer shell 4 and the air outlet of the air duct 6 gradually face upward.

[0023] Please see the appendix Figure 3 -Appendix Figure 5The insulation component includes two air inlet pipes 7, which are fixedly connected to the side of the outer shell 4 away from the heating plate 5. The inner cavity of the outer shell 4 is separated from the installation area of ​​the heating plate 5 by a partition and the air duct 6 for hot air circulation. The outlet of the air duct 6 faces the foam material in the feeding area. The inlet of the air duct 6 is connected to the air inlet pipes 7. The inlet ends of the two air inlet pipes 7 are fixedly connected to the insulation hoses 8. The inlet ends of the insulation hoses 8 are externally connected to the air supply element with heating and filtering functions. Specifically, the external air supply components include an air tank, a constant temperature heating element, an oil-water separator, and an air filter, and are equipped with a solenoid valve. The entire system is controlled by an external terminal, ensuring that the output hot air temperature is between 80℃ and 200℃. It also has the function of switching between shutting off the heating in summer and outputting room temperature air. The output air pressure is constant at 0.03MPa to 0.06MPa. It adopts a low-pressure and gentle air outlet structure, with no impact airflow, to prevent deformation of the melting surface of the foam material. The constant temperature heating element is equipped with a 220℃ over-temperature protection measure. When the heating plate 5 on the outer shell 4 completes the heat-melting process and is ready to be detached, the external air supply element is activated. The air in the air tank of the air supply element is heated by the constant temperature heating element, and filtered by the oil-water separator and air filter. After the solenoid valve is opened, the air enters the air duct 6 in the outer shell 4 through the heat-insulating hose 8 and the air inlet pipe 7. The heat-insulating hose 8 keeps the air warm throughout the process. The hot air overflows from the air outlet of the air duct 6 in a low-pressure, non-impact manner, raising the surrounding temperature to a state where the heat-sealed surface of the foam material cannot be cooled, preventing cold air from affecting the heat-sealed surface. When the outer shell 4 and the air outlet of the air duct 6 face upwards and finally tend to be horizontal, the hot air continues to overflow from the air outlet, forming an insulation zone to insulate the molten surface of the foam material.

[0024] Please see the appendix Figure 8 -Appendix Figure 10 There are two base frames 18, which are fixedly connected to the top two ends of the frame 1 respectively. A clamping cover 22 is vertically slidable on the top side of the base frame 18. The side of the base frame 18 close to the clamping cover 22 serves as the feeding area for placing foam materials that need to be heat-sealed. The two feeding areas are pushed and merged by the pushing component to make their molten surfaces join together for heat-sealing and splicing. The pushing component includes a pushing frame 19 slidably connected to the bottom end of the base frame 18. There are two abutment pieces 29 vertically slidable on the top side of the pushing frame 19. The abutment pieces 29 are threadedly connected to the adjusting bolts 21 rotatably connected to the bottom end of the pushing frame 19 to adjust the horizontal height of the abutment pieces 29. They are used in conjunction with multiple rolling rollers 23 rotatably connected to the bottom end of the clamping cover 22 to form a clamping state. The bottom side of the pushing frame 19 is fixedly connected to the middle end of the connecting frame 20. Specifically, the pusher 19 connected to the connecting frame 20 is displaced, causing the pusher 19 to work with the abutment piece 29 on the top side to push the clamped foam material. The bottom side of the foam material and the abutment piece 29 generate sufficient friction. The top side of the foam material is freed from the clamping force, and the friction force generated by the displacement is converted into the torque force of the rolling roller 23, causing the foam material to be displaced. After the foam materials at both ends are displaced, their corresponding hot melt surfaces are joined together, and the two pieces of foam material are heat-sealed. Please see the appendix Figure 6 and attached Figure 8 There are four outer casing frames 11, two of which are fixedly connected to the front and rear sides of the frame 1, respectively. The top of each outer casing frame 11 is connected to a connecting frame 20 via a push-pull assembly. The top of the connecting frame 20 is connected to a push assembly. Lifting assemblies are located at both ends of the connecting frame 20. Triggering assemblies are located on the adjacent sides of two adjacent outer casing frames 11. The push-pull assembly and the triggering assembly are connected via a lever 16. The middle end of the lever 16 is rotatably connected to the outer casing frame 11. The push-pull assembly includes two pull slides 24 located on both sides of the base frame 18. The middle end of the pull slide 24 is slidably connected to the frame 1, and one end of the pull slide 24 is fixedly connected to the connecting frame 20. The top of each outer casing frame 11 has a horizontally sliding push... The pull frame 15 has one end fixedly connected to the connecting frame 20, and the other end of the pull frame 15 slides against the guide groove at the top of the lever 16. The bottom end of the pull slide 24 is connected to the frame 1 through the spring telescopic rod 27 for resetting. The trigger assembly includes two trigger heads 17 fixedly connected to the front and rear sides of the lifting frame 2. The bottom middle of the frame 1 has two trigger frames 12 rotatably connected to the front and rear sides through torsion springs. The top of the trigger frame 12 is rotatably connected to the trigger wheel 13. The bottom end of the outer frame 11 has a horizontally sliding pull frame 14. The pull frame 14 is connected to the trigger wheel 13. One end of the pull frame 14 slides against the guide groove at the bottom end of the lever 16, and the other end of the pull frame 14 slides against the protrusion on one side of the trigger wheel 13 through the guide groove. Specifically, when the deflection frame 3 changes its attitude, the trigger head 17 at the bottom of the lifting frame 2 comes into contact with the trigger wheel 13 at the bottom of the frame 1, causing the trigger frame 12 connected to the trigger wheel 13 to deflect and compress the torsion spring used for reset. The trigger wheel 13 is driven by the deflection of the trigger frame 12, and its position changes. Through the guide groove on the traction frame 14, the traction frame 14 is moved, causing the bottom end of the lever 16 to be moved synchronously, causing its top end to pull the push-pull frame 15, and the connecting frame 20 connected to the push-pull frame 15 to move.

[0025] Please see the appendix Figure 11 and attached Figure 12The lifting cover assembly includes a sliding head 25 slidably connected to the other end of the pulling slide 24. The sliding connection between the sliding head 25 and the pulling slide 24 is provided with a sliding limit. The top of the sliding head 25 is rotatably connected to a connecting rod 26, and the connecting rod 26 is rotatably connected to the outer wall of the clamping cover 22. Specifically, during the docking process, the end of the pull carriage 24 slides on the sliding head 25. At the same time as the docking is completed, the end of the pull carriage 24 slides to the end at the sliding head 25 and the sliding head 25 is displaced. The displaced sliding head 25 supports the clamping cover 22 through the connecting rod 26 at the top, causing the clamping cover 22 to move upward, releasing the clamping of the foam material, and then taking out the foam material that has completed the heat sealing process from one side, and loading the next set of two pieces of foam material that need to be heat sealed.

[0026] 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 heat-sealing processing apparatus for PET foam material, characterized in that, include: The frame (1) has two outer shells (4) connected at the middle end by a lifting assembly. A heating plate (5) is provided on the opposite side of the outer shell (4) for hot melting processing with PET foam material. Insulation components are provided on both sides of the heating plate (5) for heat preservation of the melt surface of the foam material by hot air after hot melting processing, so as to avoid the external cold air causing the melt surface to cool down in advance and affect the bonding of the two foam materials. The base frame (18) consists of two base frames (18) and is fixedly connected to the top two ends of the frame (1). A clamping cover (22) slides vertically on the top side of the base frame (18). The side of the base frame (18) that is close to the clamping cover (22) serves as the feeding area for placing foam materials that need to be heat-sealed. The feeding areas on both sides push the foam materials together through the pushing component, so that their molten surfaces are joined and heat-sealed and fixed. There are four outer shell frames (11), two of which are fixedly connected to the front and rear sides of the frame (1) respectively. The top of each outer shell frame (11) is connected to a connecting frame (20) via a push-pull assembly. The top of the connecting frame (20) is connected to a push assembly. Both ends of the connecting frame (20) are provided with lifting assemblies. A trigger assembly is provided on the adjacent side of two adjacent outer shell frames (11). The push-pull assembly and the trigger assembly are connected by a lever (16). The middle end of the lever (16) is rotatably connected to the outer shell frame (11).

2. The heat-sealing processing and production apparatus for PET foam material according to claim 1, characterized in that, The lifting assembly includes a lifting frame (2), the bottom end of which is connected to the frame (1) via an electric guide rail (28), the top end of which is rotatably connected to a deflection frame (3), the outer shell (4) is fixedly connected to the inner wall of the deflection frame (3), the outer shell (11) is fixedly connected to a guide frame (9) on the side away from the lever (16), the bottom end of the lifting frame (2) is connected to the frame (1) via an electric guide rail (28) for lifting operations, the bottom end of the deflection frame (3) is fixedly connected to a guide protrusion (10), and the guide protrusion (10) slides against the arc-shaped guide groove of the guide frame (9).

3. The heat-sealing processing and production apparatus for PET foam material according to claim 1, characterized in that, The insulation component includes two air inlet pipes (7), which are fixedly connected to the side of the outer shell (4) away from the heating plate (5). The inner cavity of the outer shell (4) is separated from the installation area of ​​the heating plate (5) by a partition and the air duct (6) for hot air circulation. The outlet of the air duct (6) faces the foam material in the feeding area, and the inlet of the air duct (6) is connected to the air inlet pipes (7).

4. The heat-sealing processing and production apparatus for PET foam material according to claim 3, characterized in that, The two air inlet pipes (7) are fixedly connected to the input ends of the insulated hoses (8), and the input ends of the insulated hoses (8) are connected to an air supply element with heating and filtering functions.

5. The heat-sealing processing apparatus for PET foam material according to claim 1, characterized in that, The pushing assembly includes a pushing frame (19) slidably connected to the bottom end of the base frame (18). The top side of the pushing frame (19) has two abutment pieces (29) that slide vertically. The abutment pieces (29) are threadedly connected to the adjusting bolt (21) rotatably connected to the bottom end of the pushing frame (19) to adjust the horizontal height of the abutment pieces (29). The abutment pieces (29) are then rotatably connected to the bottom end of the clamping cover (22) to form a clamping state. The bottom side of the pushing frame (19) is fixedly connected to the middle end of the connecting frame (20).

6. The heat-sealing processing apparatus for PET foam material according to claim 5, characterized in that, The push-pull assembly includes two pull slides (24) located on both sides of the base frame (18). The middle end of the pull slide (24) is slidably connected to the frame (1), and one end of the pull slide (24) is fixedly connected to the connecting frame (20). A push-pull frame (15) is horizontally slidably attached to the top of the outer shell frame (11). One end of the push-pull frame (15) is fixedly connected to the connecting frame (20), and the other end of the push-pull frame (15) slides against the guide groove at the top of the lever (16).

7. The heat-sealing processing apparatus for PET foam material according to claim 6, characterized in that, The bottom end of the pull slide (24) is connected to the frame (1) via a spring telescopic rod (27) for resetting.

8. The heat-sealing processing apparatus for PET foam material according to claim 6, characterized in that, The lifting cover assembly includes a sliding head (25) slidably connected to the other end of the pulling slide (24). The sliding head (25) and the sliding connection part of the pulling slide (24) are provided with a sliding limit. The top end of the sliding head (25) is rotatably connected to a connecting rod (26), and the connecting rod (26) is rotatably connected to the outer wall of the clamping cover (22).

9. The heat-sealing processing apparatus for PET foam material according to claim 2, characterized in that, The triggering assembly includes two trigger heads (17) fixedly connected to the front and rear sides of the lifting frame (2). The bottom middle of the frame (1) has two trigger frames (12) rotatably connected to the front and rear sides by torsion springs. The top of the trigger frame (12) is rotatably connected to a trigger wheel (13). The bottom of the outer frame (11) has a horizontally sliding traction frame (14) connected to the trigger wheel (13).

10. The heat-sealing processing apparatus for PET foam material according to claim 9, characterized in that, One end of the traction frame (14) slides against the guide groove at the bottom of the lever (16), and the other end of the traction frame (14) slides against the protrusion on one side of the trigger wheel (13) through the guide groove.

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