Four-fluorine cloth roll curl quick-change structure

Abstract

The utility model discloses a kind of four fluorine cloth curl quick-change structure, including elastic plunger, four fluorine cloth, fixed side heat sealing assembly, four fluorine cloth quick-change seat, heat sealing heating strip, movable side heat sealing assembly, T key, movable side upper pressing plate, spring, plunger head, limit hole, connecting rod, buffer layer, guide rail, plunger slot, floating pressing plate, four fluorine cloth curling assembly, fixed side pressing plate, reel, bearing, floating joint, driving motor, heat sealing system.The utility model passes through the modularization design of four fluorine cloth quick-change seat, the instantaneous locking of elastic plunger, the precision guide of T key and the tension balance of curling assembly, systematically solve the low replacement efficiency of traditional equipment, positioning deviation is big and curling wrinkle problem, significantly improve heat seal quality and production continuity.

Description

Technical Field

[0001] This utility model belongs to the field of packaging machinery technology, and in particular relates to a quick-change structure for PTFE fabric rolls. Background Technology

[0002] In automated packaging processes in industries such as food and pharmaceuticals, heat sealing is a critical step. In this process, PTFE (polytetrafluoroethylene-coated fiberglass cloth) plays a vital role as both a protective and insulating layer. When the heat sealing head (heating plate, heating strip, welding torch, etc.) directly contacts the plastic material being heat-sealed at high temperatures, the molten plastic easily adheres to the metal surface of the heat sealing head. PTFE cloth, with its excellent non-stick properties, prevents the molten plastic from adhering to the cloth when placed between the heat sealing head and the material being sealed, thus perfectly solving the adhesion problem.

[0003] In existing heat sealing equipment, PTFE cloth, as an anti-sticking medium, needs to be frequently replaced to maintain heat sealing quality. According to the search, a PTFE cloth fixing device with the publication number CN212196167U is disclosed on the Chinese Patent Network. This device can be used to fix PTFE cloth, but there are some defects and deficiencies that need to be improved: (1) The traditional fixing structure mainly relies on fasteners such as screws to press the PTFE cloth. When disassembling, multiple fasteners need to be operated, and a single replacement takes ≥5 minutes, which seriously interrupts the continuous operation of the heat sealing equipment; (2) Some existing fixing structures have insufficient positioning accuracy, and quick-change parts lack effective guiding mechanisms, which easily cause installation deviations, resulting in misalignment between the PTFE cloth and the heat sealing strip, causing a decrease in local contact area, which in turn causes uneven heat transfer and produces weak areas or adhesion defects in the packaging film sealing; (3) Some existing fixing structures have poor winding stability. When manually winding the PTFE cloth, the tension fluctuation is as high as ±30%, and the wrinkle rate is >8%, which significantly reduces the effective coverage of the anti-sticking layer, thus easily inducing material curling deformation under high temperature conditions. Therefore, the PTFE fabric quick-change structure provided by this utility model is of great significance in addressing the above problems. Utility Model Content

[0004] This invention provides a quick-change structure for PTFE fabric rolls. Simply press the elastic plunger and pull out the old PTFE fabric quick-change seat, then insert the new PTFE fabric quick-change seat to the guide groove limit. The elastic plunger automatically locks, completing the PTFE fabric replacement process without the need for tools. This significantly improves the efficiency of PTFE fabric replacement and effectively avoids interruptions to the continuous operation of the heat sealing equipment. The rolling tension of the PTFE fabric is adjusted by the damping mechanism of the roll shaft to ensure its fit with the heat sealing heating strip. The heat sealing heating strip is integrated into the PTFE fabric quick-change seat. After being powered on, the heat generated by the heat sealing heating strip is evenly conducted to the packaging film through the PTFE fabric, achieving efficient heat sealing. Due to the high temperature resistance and low adhesion properties of the PTFE fabric, the packaging film is easy to separate after heat sealing. Through modular quick-change design, elastic locking mechanism, and floating pressing mechanism, the efficiency of PTFE fabric replacement and the stability of the heat sealing process are significantly improved, while simplifying equipment maintenance. It is particularly suitable for automated packaging scenarios requiring frequent material changes, thus solving the problems in the background technology.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model discloses a PTFE cloth curling quick-change structure, comprising an elastic plunger, PTFE cloth, a fixed-side heat sealing assembly, a PTFE cloth quick-change seat, a heat sealing heating strip, a movable-side heat sealing assembly, a T-key, a movable-side upper pressure plate, a spring, a plunger head, a limiting hole, a connecting rod, a buffer layer, a guide rail, a plunger groove, a floating pressure plate, a PTFE cloth curling assembly, a fixed-side pressure plate, a roller, a bearing, a floating joint, a drive motor, and a heat sealing system;

[0007] The floating pressure plate is divided into a movable upper pressure plate and a fixed pressure plate, and the movable upper pressure plate and the fixed pressure plate are connected by an elastic element.

[0008] The PTFE cloth winding assembly is integrated and installed in the internal cavity of the PTFE cloth quick-change seat. The assembly mainly includes a roller, a T-key, a bearing seat, a control knob, and a damping adjustment mechanism. High-precision ball bearings are respectively installed at both ends of the roller and fixed in the bearing mounting holes inside the PTFE cloth quick-change seat. One end of the roller is connected to the control knob inside the PTFE cloth quick-change seat through a T-key. The damping adjustment mechanism is located on one side of the roller. The PTFE cloth quick-change seat is connected to the main body of the equipment through an elastic plunger. The PTFE cloth quick-change seat integrates a heat-sealing heating strip.

[0009] The heat sealing system consists of a symmetrical fixed-side heat sealing assembly and a movable-side heat sealing assembly, which are respectively connected to the fixed-side pressure plate and the movable-side upper pressure plate of the floating pressure plate. The movable-side heat sealing assembly is installed on the sliding module and holds the PTFE cloth to be heat-sealed by the two pressure plates.

[0010] The PTFE fabric winding assembly has bearings at both ends of the winding shaft, the bearings are connected to floating joints, and the winding shaft is connected to a drive motor through the floating joints.

[0011] Furthermore, the surface of the PTFE quick-change seat is provided with an arc-shaped rolled surface, and the radius of curvature of the arc-shaped rolled surface matches the heating surface of the heat-sealing heating strip.

[0012] Furthermore, the elastic plunger includes a spring and a plunger head. The elastic plunger is installed on the fixed-side heat sealing assembly and has a plunger groove. The plunger head is engaged in the limiting hole of the fixed-side heat sealing assembly under the elastic force of the spring. The T-key is connected to the plunger head through a connecting rod.

[0013] Furthermore, a buffer layer is provided between the floating pressure plate and the movable upper pressure plate.

[0014] Furthermore, the operation path of the T-shaped key is a horizontal sliding direction, and the end of the T-shaped key is provided with anti-slip texture.

[0015] Furthermore, the fixed-side heat sealing assembly and the movable-side heat sealing assembly are connected by a guide rail.

[0016] Furthermore, the heat-sealing heating strip is fixed in the mounting groove of the fixed-side heat-sealing component, and its surface is coated with a high-temperature resistant ceramic layer.

[0017] Furthermore, the back of the PTFE quick-change holder is provided with heat dissipation fins.

[0018] The present invention has the following advantages over the prior art:

[0019] (1) When using the PTFE cloth quick-change structure of this utility model, you only need to press the elastic plunger and pull out the old PTFE cloth quick-change seat, and then insert the new PTFE cloth quick-change seat to the guide groove limit. The elastic plunger will automatically lock and the PTFE cloth can be replaced. No tools are needed throughout the process, which greatly improves the replacement efficiency of PTFE cloth and effectively avoids the interruption of the continuous operation of the heat sealing equipment.

[0020] (2) In the present invention, when the PTFE cloth is used, the rolling tension of the PTFE cloth is adjusted by the damping mechanism of the roller to ensure its fit with the heat sealing heating strip. The heat sealing heating strip is integrated in the PTFE cloth quick-change seat. After being powered on, the heat generated by the heat sealing heating strip is evenly conducted to the packaging film through the PTFE cloth. It can not only efficiently complete the heat sealing, but also ensure that the packaging film is easy to separate after heat sealing due to the high temperature resistance and low adhesion of the PTFE cloth.

[0021] (3) The PTFE cloth roll quick-change structure of this utility model significantly improves the replacement efficiency of PTFE cloth and the stability of heat sealing process through modular quick-change design, elastic locking mechanism and floating pressing mechanism, while simplifying the equipment maintenance process. It is especially suitable for automated packaging scenarios that require frequent material replacement.

[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a PTFE fabric quick-change structure according to the present invention.

[0025] Figure 2 This is a schematic diagram of the bottom sealing and fixing side assembly of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the bottom sealing heat-sealing component of this utility model;

[0027] Figure 4 This is a detailed internal view of the elastic plunger and T-key in this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Elastic plunger; 2. PTFE cloth; 3. Fixed-side heat sealing assembly; 4. PTFE cloth quick-change seat; 5. Heat sealing heating strip; 6. Movable-side heat sealing assembly; 7. T-key; 8. Movable-side upper pressure plate; 9. Spring; 10. Plunger head; 11. Limiting hole; 12. Connecting rod; 13. Buffer layer; 14. Guide rail; 15. Plunger groove; 16. Floating pressure plate; 17. PTFE cloth winding assembly; 18. Fixed-side pressure plate; 19. Reel; 20. Bearing; 21. Floating joint; 22. Drive motor. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Please see Figure 1-4 As shown, the present invention discloses a PTFE cloth curling quick-change structure, comprising an elastic plunger 1, PTFE cloth 2, a fixed-side heat sealing assembly 3, a PTFE cloth quick-change seat 4, a heat sealing heating strip 5, a movable-side heat sealing assembly 6, a T-key 7, a movable-side upper pressure plate 8, a spring 9, a plunger head 10, a limiting hole 11, a connecting rod 12, a buffer layer 13, a guide rail 14, a plunger groove 15, a floating pressure plate 16, a PTFE cloth curling assembly 17, a fixed-side pressure plate 18, a roller 19, a bearing 20, a floating joint 21, a drive motor 22, and a heat sealing system;

[0033] The floating pressure plate 16 is divided into a movable upper pressure plate 8 and a fixed pressure plate 18. The movable upper pressure plate 8 and the fixed pressure plate 18 are connected by an elastic element, which can realize adaptive pressing to ensure uniform contact between the PTFE cloth 2 and the heat sealing heating strip 5.

[0034] The PTFE cloth winding assembly 17 is integrated into the internal cavity of the PTFE cloth quick-change seat 4. It adopts a roller-type structure design, facilitating the rapid winding and replacement of the PTFE cloth 2. This assembly mainly includes a roller 19, a T-key 7, a bearing seat, a control knob, and a damping adjustment mechanism. The roller 19 is composed of a solid round shaft with a diameter of 12mm, preferably made of 45 steel and heat-treated to improve its comprehensive mechanical properties. It possesses good bending strength and fatigue resistance, maintaining stable deformation during repeated winding and unwinding processes. It is suitable for applications requiring high winding accuracy and structural rigidity. The roller 19 has two ends respectively... High-precision ball bearings are fixed in the bearing mounting holes inside the PTFE quick-change seat 4, thus achieving low-friction and stable rotation. One end of the roll 19 is connected to the control knob inside the PTFE quick-change seat 4 via a T-key 7. The T-key 7 not only provides axial limiting and anti-rotation functions, but also forms a reliable fit with the control components. By rotating the control knob, the user can drive the roll 19 to rotate clockwise or counterclockwise, thereby realizing the winding or unwinding operation of the PTFE cloth 2. During the rotation of the roll 19, the PTFE cloth 2 can be tightly wound around the outer surface of the roll 19 to ensure that the fabric is neatly aligned and to avoid deviation or wrinkling. The damping adjustment mechanism is located on the roll. On one side of 19, the mechanism adopts a friction damping structure, specifically composed of a damping plate, a clamping spring, and an adjusting screw. Users can adjust the clamping force by adjusting the screw, thereby adjusting the torque required for the rotation of the roll 19 and controlling the tightness of the fabric. This damping structure effectively prevents material loosening due to excessively loose winding and also prevents fabric tearing due to excessive tightness, thus improving the stability of equipment operation and the service life of the PTFE cloth 2. The PTFE cloth quick-change seat 4 is connected to the main body of the equipment via an elastic plunger 1. The PTFE cloth quick-change seat 4 integrates a heat-sealing heating strip 5. After being powered on, the heat generated by the heat-sealing heating strip 5 is evenly conducted through the PTFE cloth 2. The packaging film can be heat-sealed efficiently, and due to the high temperature resistance and low adhesion of PTFE cloth 2, it can be easily separated after heat sealing. The T-key 7 and the guide groove of the PTFE cloth quick-change seat 4 can ensure accurate positioning during installation to avoid heat sealing failure or PTFE cloth 2 wrinkles due to misalignment. The curling tension of PTFE cloth 2 is adjusted by the damping mechanism of the roller 19 to ensure its fit with the heat sealing heating strip 5. When replacing PTFE cloth 2, simply press the elastic plunger 1 and pull out the old PTFE cloth quick-change seat 4, then insert the new PTFE cloth quick-change seat 4 to the limit of the guide groove, and the elastic plunger 1 will automatically lock to complete the replacement. No tools are required throughout the process.

[0035] The heat sealing system consists of a symmetrical fixed-side heat sealing component 3 and a movable-side heat sealing component 6, which are respectively connected to the fixed-side pressure plate 18 and the movable-side upper pressure plate 8 of the floating pressure plate 16. The movable-side heat sealing component 6 is installed on the sliding module and holds the PTFE cloth 2 to be heat sealed by the two pressure plates.

[0036] The PTFE fabric winding assembly 17 has bearings 20 at both ends of the spool 19, and the bearings 20 are connected to floating joints 21. The spool 19 is connected to a drive motor 22 through the floating joints 21. When the drive motor 22 is started, it can drive the spool 19 to rotate, so as to realize the automatic winding or unwinding of the PTFE fabric 2.

[0037] The PTFE quick-change seat 4 has an arc-shaped curled surface on its surface. The radius of curvature of the arc-shaped curled surface matches the heating surface of the heat-sealing heating strip 5, which can form a local gap between the PTFE cloth 2 and the heat-sealing heating strip 5, thereby avoiding direct contact and adhesion at high temperatures.

[0038] The elastic plunger 1 includes a spring 9 and a plunger head 10. The elastic plunger 1 is installed in a plunger groove 15 on the fixed side heat sealing assembly 3. Under the elastic force of the spring 9, the plunger head 10 is inserted into the limiting hole 11 of the fixed side heat sealing assembly 3. The elastic plunger 1 is normally in a compressed state, locking the PTFE quick-change seat 4 in the working position. When replacing, pressing the elastic plunger 1 can release the lock, so that the PTFE quick-change seat 4 can be quickly disassembled and installed by pushing and pulling. The T-key 7 is rigidly connected to the plunger head 10 through the connecting rod 12. When the T-key 7 is pushed and pulled, the connecting rod 12 drives the plunger head 10 to compress the spring 9, causing it to disengage from the limiting hole 11, thereby releasing the locked state of the PTFE quick-change seat 4.

[0039] A buffer layer 13 is provided between the floating pressure plate 16 and the movable upper pressure plate 8. The buffer layer 13 can be made of silicone to evenly distribute pressure during the heat sealing process, thereby avoiding poor sealing caused by mechanical errors.

[0040] The operation path of the T-key 7 is a horizontal sliding direction, and the end of the T-key 7 is provided with anti-slip texture. The anti-slip texture can increase the friction to facilitate manual push and pull operation.

[0041] The fixed-side heat-sealing component 3 and the movable-side heat-sealing component 6 are connected by a guide rail 14. Under the control of a servo driver, the movable-side heat-sealing component 6 moves along the guide rail 14 towards the fixed side to close the floating pressure plate 16. The moving distance of the movable-side heat-sealing component 6 is typically set within the range of 20–60 mm to ensure effective closure with the fixed-side heat-sealing component 3. The moving speed ranges from 20 to 100 mm / s and is adjusted by the servo control system. To prevent material impact deformation, a segmented speed control strategy is adopted during the movement process, slowing down when approaching the closed position to ensure a smooth pressing process. The heat-sealing temperature is controlled by the heating unit inside the heat-sealing component, with a temperature control range of 120–180℃, and closed-loop PID control is implemented by a temperature control module. The heat-sealing time (i.e., the duration of heating and maintaining the closure) is generally set between 0.2 and 2.0 seconds. Based on material properties, the system ensures that the heat-sealing layer is fully fused without melting through. In addition, to ensure uniform stress during the heat-sealing process, the heat-sealing assembly, in conjunction with the elastic plunger 1 and the floating pressure plate 16 with internal elastic elements, applies flexible clamping force during the closing process, which can effectively buffer heat-sealing pressure fluctuations and improve the bonding quality of the heat-sealed surface. Considering the differences in the types of packaging materials (such as PET / PE, OPP / CPP, metallized film, etc.) and thicknesses (usually 60-200μm), the heat-sealing parameters need to be adjusted according to the material characteristics. To improve adaptability and operational efficiency, the control system provides multiple heat-sealing process parameter setting interfaces, allowing operators to input target parameters through the touch interface, including heat-sealing temperature, heat-sealing time, pressing speed, and moving distance. The set process parameters can be saved as standard process formulas and stored in the control system for quick recall when switching between different materials.

[0042] The heat-sealing heating strip 5 is fixed in the mounting groove of the fixed-side heat-sealing component 3, and its surface is coated with a high-temperature resistant ceramic layer to reduce heat loss and improve heat conduction efficiency.

[0043] The back of the PTFE quick-change holder 4 is equipped with heat dissipation fins, which can be used to assist in the rapid cooling of the PTFE cloth 2.

[0044] The circuits, electronic components, and chip modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0045] All standard parts used in the application documents can be purchased from the market. All components in this application document can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The electrical components mentioned in this document are all electrically connected to the external main controller and power supply, and the main controller is a conventional known device that can play a control role.

[0046] The working principle of this utility model is as follows:

[0047] In use, this invention only requires pressing the elastic plunger 1 and pulling out the old PTFE quick-change seat 4, then inserting the new PTFE quick-change seat 4 to the guide groove limit position. The elastic plunger 1 automatically locks, completing the replacement of the PTFE cloth 2. No tools are needed throughout the process, which greatly improves the replacement efficiency of the PTFE cloth 2 and effectively avoids interruption of the continuous operation of the heat sealing equipment. The curling tension of the PTFE cloth 2 is adjusted by the damping mechanism of the roller 19 to ensure its fit with the heat sealing heating strip 5. The heat sealing heating strip 5 is integrated inside the PTFE quick-change seat 4. After being powered on, the heat generated by the heat sealing heating strip 5 is evenly conducted to the packaging film through the PTFE cloth 2, which can not only complete the heat sealing efficiently, but also ensure that the packaging film is easy to separate after heat sealing due to the high temperature resistance and low adhesion characteristics of the PTFE cloth 2. This invention significantly improves the replacement efficiency of the PTFE cloth 2 and the stability of the heat sealing process through modular quick-change design, elastic locking mechanism and floating pressing mechanism, while simplifying the equipment maintenance process. It is especially suitable for automated packaging scenarios that require frequent material replacement.

[0048] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A four-fluoro cloth roll quick change structure, characterized by, Includes elastic plunger (1), PTFE cloth (2), fixed side heat sealing assembly (3), PTFE cloth quick-change seat (4), heat sealing heating strip (5), movable side heat sealing assembly (6), T-key (7), movable side upper pressure plate (8), spring (9), plunger head (10), limiting hole (11), connecting rod (12), buffer layer (13), guide rail (14), plunger groove (15), floating pressure plate (16), PTFE cloth curling assembly (17), fixed side pressure plate (18), spool (19), bearing (20), floating joint (21), drive motor (22), and heat sealing system; The floating pressure plate (16) is divided into a movable side upper pressure plate (8) and a fixed side pressure plate (18), and the movable side upper pressure plate (8) and the fixed side pressure plate (18) are connected by an elastic element; The PTFE cloth winding assembly (17) is integrated and installed in the internal cavity of the PTFE cloth quick-change seat (4). The assembly mainly includes a roller (19), a T-key (7), a bearing seat, a control knob, and a damping adjustment mechanism. High-precision ball bearings are respectively installed at both ends of the roller (19) and fixed in the bearing mounting holes inside the PTFE cloth quick-change seat (4). One end of the roller (19) is connected to the control knob inside the PTFE cloth quick-change seat (4) through the T-key (7). The damping adjustment mechanism is located on one side of the roller (19). The PTFE cloth quick-change seat (4) is connected to the main body of the equipment through an elastic plunger (1). The PTFE cloth quick-change seat (4) is integrated with a heat-sealing heating strip (5). The heat sealing system consists of a symmetrical fixed-side heat sealing assembly (3) and a movable-side heat sealing assembly (6), which are respectively connected to the fixed-side pressure plate (18) and the movable-side upper pressure plate (8) of the floating pressure plate (16). The movable-side heat sealing assembly (6) is installed on the sliding module and holds the PTFE cloth (2) to be heat sealed by the two pressure plates. The PTFE fabric winding assembly (17) has bearings (20) at both ends of the spool (19), the bearings (20) are connected to floating joints (21), and the spool (19) is connected to a drive motor (22) through the floating joints (21).

2. The four-fluoro cloth curl quick-change structure according to claim 1, characterized by, The surface of the PTFE quick-change seat (4) is provided with an arc-shaped curled surface, and the radius of curvature of the arc-shaped curled surface matches the heating surface of the heat-sealing heating strip (5).

3. The four-fluoro cloth curl quick-change structure according to claim 1, characterized by, The elastic plunger (1) includes a spring (9) and a plunger head (10). The elastic plunger (1) is installed in a plunger groove (15) on the fixed side heat sealing assembly (3). The plunger head (10) is inserted into the limiting hole (11) of the fixed side heat sealing assembly (3) under the elastic force of the spring (9). The T-key (7) is connected to the plunger head (10) through the connecting rod (12).

4. The PTFE fabric quick-change structure according to claim 1, characterized in that, A buffer layer (13) is provided between the floating pressure plate (16) and the movable side upper pressure plate (8).

5. The four-fluoro cloth curl quick-change structure according to claim 1, characterized by, The operation path of the T-key (7) is a horizontal sliding direction, and the end of the T-key (7) is provided with anti-slip texture.

6. The four-fluoro cloth curl quick-change structure according to claim 1, characterized by, The fixed-side heat sealing assembly (3) and the movable-side heat sealing assembly (6) are connected by a guide rail (14).

7. The four-fluoro cloth curl quick-change structure according to claim 1, characterized by, The heat sealing heating strip (5) is fixed in the mounting groove of the fixed side heat sealing assembly (3), and the surface is coated with a high-temperature resistant ceramic layer.

8. The four-fluoro cloth curl quick-change structure according to claim 1, characterized by, The back of the four-fluorine cloth quick-change seat (4) is provided with a heat dissipation fin.

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