Polymer electrothermal film coating equipment

Abstract

The utility model discloses a kind of polymer electrothermal film laminating equipment, it is related to laminating equipment field, including workbench, the front end of workbench is provided with discharging roller, the middle part of workbench is sequentially provided with laminating roller and film combining roller from top to bottom, the rear of discharging roller is provided with conveying belt, the top of conveying belt is sequentially provided with glue spraying mechanism and electric heating mechanism, the end of conveying belt is provided with a group of extruding roller for raw material and laminating film combination, the rear of extruding roller is provided with tension device, the rear of tension device is provided with winding roller, and tension device includes tension roller and adjusting mechanism, adjusting mechanism is installed on workbench, tension roller is installed on adjusting mechanism, and tension roller is hollow structure, the surface of tension roller uses heat-conducting material, the both sides of tension roller are provided with swivel joint, and swivel joint is sequentially communicated with circulating pump, water tank. The cooling mode of liquid cooling guarantees the rapid setting of material after laminating, and can realize the stable control of tension.

Description

Technical Field

[0001] This utility model belongs to the field of coating equipment, specifically relating to a polymer electrothermal film coating equipment. Background Technology

[0002] With the rapid development of modern industry and smart homes, polymer electric heating films, as a highly efficient and energy-saving electrothermal conversion material, are widely used in heating equipment, underfloor heating systems, medical and therapeutic applications, and industrial heating due to their thinness, uniformity, high thermal efficiency, and safety. In the production process of polymer electric heating films, the lamination process is a key step. Its function is to bond the electric heating film to a substrate (such as PET film or fabric) using adhesives, forming a composite film material that provides protection, insulation, and enhanced structural strength. This directly affects the product's heating uniformity, service life, and reliability.

[0003] Currently, while existing polymer electrothermal film lamination equipment can meet basic composite requirements, it still has many shortcomings in actual production: 1. After lamination, the material needs to be cooled and shaped quickly to avoid shrinkage and deformation caused by residual heat. However, existing equipment mostly uses natural cooling or single air cooling, which has low cooling efficiency and uneven temperature distribution, easily causing inconsistent local shrinkage of the film material and affecting the flatness of the product; 2. During the lamination process, the material needs to go through multiple processes such as conveying, heating, and extrusion. The material is prone to relaxation or overstretching due to tension fluctuations. Traditional tensioning devices mostly rely on single roller counterweights or simple spring adjustments, which are difficult to dynamically compensate for tension changes caused by temperature changes and differences in conveying speed. This often leads to material wrinkles, misalignment, or even breakage, reducing the yield; 3. When the electrothermal film is laminated with the substrate, heating is needed to promote the curing of the adhesive. However, traditional heating mechanisms are mostly integral heating or local heating plates in direct contact, which has the problem of uneven temperature distribution. Local overheating can easily lead to adhesive decomposition or substrate melting, while local insufficient temperature will lead to incomplete curing and reduce the composite strength.

[0004] Therefore, how to provide a coating equipment that can achieve efficient cooling and shaping, uniform heating, and dynamic tension control to improve the stability of polymer electrothermal film coating process and product quality has become a problem that needs to be considered by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a polymer electrothermal film coating equipment. The present invention can ensure the rapid shaping of the coated material through liquid cooling, avoid shrinkage and deformation caused by residual heat, and the tensioning device ensures the stability of the tension.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A polymer electrothermal film coating device includes a worktable. A feeding roller is provided at the front end of the worktable. A coating roller and a film-closing roller are arranged sequentially from top to bottom in the middle of the worktable. A conveyor belt is provided behind the feeding roller. A glue spraying mechanism and an electric heating mechanism are arranged sequentially above the conveyor belt. A set of extrusion rollers for bonding raw materials with the film are provided at the end of the conveyor belt. A tensioning device is provided behind the extrusion rollers. A take-up roller is provided behind the tensioning device. The tensioning device includes a tensioning roller and an adjusting mechanism. The adjusting mechanism is installed on the worktable. The tensioning roller is installed on the adjusting mechanism. The tensioning roller has a hollow structure. The surface of the tensioning roller is made of a thermally conductive material. Rotary joints are provided on both sides of the tensioning roller. The rotary joints are connected to a circulating pump and a water tank in sequence.

[0008] Furthermore, the glue spraying mechanism includes a transverse module and a glue spraying gun. The transverse module includes a mounting plate, a slide rail, a lead screw, a slider, and a drive motor. The mounting plate is fixed to the side plate of the conveyor belt. The slide rail is disposed on the lower surface of the mounting plate. The lead screw is rotatably disposed in the mounting plate. The drive motor is disposed on one side of the mounting plate and connected to the lead screw via a coupling. The slider is slidably disposed on the slide rail and is threadedly connected to the lead screw. The glue spraying gun is fixed on the slider.

[0009] Furthermore, the adjustment mechanism includes a connecting plate and a tension spring. One end of the connecting plate is hinged to the worktable, and the other end of the connecting plate is fixedly connected to a rotary joint. One end of the tension spring is fixed to the worktable, and the other end of the tension spring is fixed to the upper part of the connecting plate.

[0010] Furthermore, the electric heating mechanism includes a heat insulation cover, which is installed on the side plates on both sides of the conveyor belt, and resistance wires are evenly arranged inside the heat insulation cover.

[0011] Furthermore, it also includes a bellows and a cooling fan. The bellows is located outside the tensioning device, the cooling fan is installed on the side of the bellows, and louvers are provided on the other side of the bellows.

[0012] Furthermore, a raw material placement rack is provided below the workbench.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The tension roller of this utility model adopts a hollow heat-conducting structure. The rotary joints on both sides are connected to the circulating pump and water tank to form a liquid-cooled circulation system. Combined with the cooling fan in the outer air box and the forced convection heat dissipation of the louvers, it can quickly remove the residual heat of the material after film coating, realize the gradient temperature control of "heating and cooling", avoid inconsistent film shrinkage caused by residual heat, and significantly improve the flatness and dimensional stability of the product. At the same time, the electric heating mechanism wraps the uniformly arranged resistance wires inside with a heat insulation cover, which not only prevents heat loss to the outside, but also forms a stable thermal field through the uniformly distributed resistance wires, ensuring that the adhesive is heated evenly during the film coating process, preventing local overheating or insufficient temperature, and improving the strength and reliability of the composite material.

[0015] 2. This utility model's tensioning device, through an adjustment mechanism of "connecting plate hinge and tension spring elastic compensation," combined with a hollow, heat-conducting tensioning roller, achieves dynamic tension control of the coating material. One end of the connecting plate is hinged to the worktable, and the other end is rotatably connected to the tensioning roller. The two ends of the tension spring are fixed to the upper part of the worktable and the connecting plate, respectively. When the material's tension changes due to temperature variations, transmission speed fluctuations, or its own expansion and contraction, the tension spring can adaptively adjust the angle of the connecting plate through elastic deformation, thereby pushing or pulling the tensioning roller to maintain the material in a moderately tensioned state. This avoids wrinkles, misalignments, or breakage caused by excessive stretching due to slack, significantly improving the stability and yield of the coating process.

[0016] 3. This utility model's glue spraying mechanism uses a transverse module to drive the glue gun to move laterally. Its structure includes a mounting plate, slide rail, lead screw, slider, and drive motor. Through the precision transmission of the lead screw and the linear guidance of the slider, the glue gun can achieve uniform, linear movement along the width of the material. Combined with the precise speed adjustment of the drive motor, the glue spraying path and speed can be strictly controlled, avoiding the glue quantity deviation problems of traditional fixed or simple reciprocating glue spraying structures. This design ensures a uniform glue layer thickness, effectively reducing the phenomenon of excessive or insufficient glue in certain areas, and significantly improving the film bonding strength and product qualification rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the installation of the rotary joint of this utility model.

[0021] In the diagram: 1. Workbench; 101. Raw material placement rack; 2. Feeding roller; 301. Coating roller; 302. Closing roller; 4. Conveyor belt; 501. Glue gun; 502. Mounting plate; 503. Slide rail; 504. Lead screw; 505. Slider; 506. Drive motor; 601. Heat insulation cover; 602. Resistance wire; 7. Extrusion roller; 801. Tension roller; 802. Rotary joint; 803. Tension spring; 804. Connecting plate; 9. Rewinding roller; 10. Air box; 11. Cooling fan. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "horizontal," "inner," "outer," and "one side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example 1

[0025] like Figure 1-4 As shown, this embodiment discloses a polymer electrothermal film coating equipment, including a workbench 1. A feeding roller 2 is provided at the front end of the workbench 1. A coating roller 301 and a film-closing roller 302 are provided in the middle of the workbench 1. The film-closing roller 302 serves to both reverse the direction of the film and perform preliminary pressing. A conveyor belt 4 is provided behind the feeding roller 2. A glue spraying mechanism and an electric heating mechanism are arranged sequentially above the conveyor belt 4. A set of extrusion rollers 7 for further bonding of the raw material and the coating are provided at the end of the conveyor belt 4. A tensioning device is provided behind the extrusion rollers 7, and a take-up roller 9 is provided behind the tensioning device.

[0026] The glue spraying mechanism in this embodiment includes a transverse module and a glue spraying gun 501. The transverse module includes a mounting plate 502, a slide rail 503, a lead screw 504, a slider 505, and a drive motor 506. The mounting plate 502 is fixed on the side plate of the conveyor belt 4. The slide rail 503 is disposed on the lower surface of the mounting plate 502. The lead screw 504 is rotatably disposed in the mounting plate 502. The drive motor 506 is disposed on one side of the mounting plate 502 and is connected to the lead screw 504 through a coupling. The slider 505 is slidably disposed on the slide rail 503 and is threadedly connected to the lead screw. The glue spraying gun 501 is fixed on the slider 505. Through the precision transmission of the lead screw 504 and the linear guidance of the slider 505, the glue spraying gun 501 can achieve uniform and linear movement along the width direction of the material, ensuring that the thickness of the glue sprayed is consistent.

[0027] The electric heating mechanism includes a heat insulation cover 601, which is installed on the side plates on both sides of the conveyor belt 4. Resistance wires 602 are evenly arranged inside the heat insulation cover 601, which can continuously heat the hot melt adhesive on the surface of the raw material and promote better adhesion between the film and the raw material.

[0028] In this embodiment, the tensioning device includes a tensioning roller 801 and an adjusting mechanism. The adjusting mechanism is installed on the workbench 1, and the tensioning roller 801 is installed on the adjusting mechanism. The tensioning roller 801 has a hollow structure, and the surface of the tensioning roller 801 is made of a heat-conducting material. Rotary joints 802 are provided on both sides of the tensioning roller 801. The rotary joints 802 are connected to the circulating pump and water tank participating in the liquid cooling cycle in sequence through hoses. The liquid cooling cycle can quickly cool down the material passing through the tensioning roller 801.

[0029] In this embodiment, the adjustment mechanism includes a connecting plate 804 and a tension spring 803. One end of the connecting plate 804 is hinged to the workbench 1, and the other end of the connecting plate 804 is fixedly connected to the rotary joint 802. One end of the tension spring 803 is fixed on the workbench 1, and the other end of the tension spring 803 is fixed on the upper part of the connecting plate 804. The tension roller 801 is kept in a moderately tensioned state by the tension spring 803.

[0030] As a preferred embodiment of the present invention, it also includes a wind box 10 and a cooling fan 11. The wind box 10 is located outside the tensioning device, and the cooling fan 11 is installed on the side of the wind box 10. A louver is provided on the other side of the wind box 10. The side placement of the cooling fan 11 can improve the air circulation around the film material and further improve the cooling speed.

[0031] In a preferred embodiment of the present invention, a raw material placement rack 101 for placing raw materials and coating is installed on the lower layer of the workbench.

[0032] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A polymer electrothermal film coating device, characterized in that, The device includes a workbench with a feeding roller at its front end. A coating roller and a film-closing roller are arranged sequentially from top to bottom in the middle of the workbench. A conveyor belt is located behind the feeding roller. A glue-spraying mechanism and an electric heating mechanism are arranged sequentially above the conveyor belt. A set of extrusion rollers for bonding the raw material with the coating is located at the end of the conveyor belt. A tensioning device is located behind the extrusion rollers, and a take-up roller is located behind the tensioning device. The tensioning device includes a tensioning roller and an adjusting mechanism. The adjusting mechanism is mounted on the workbench, and the tensioning roller is mounted on the adjusting mechanism. The tensioning roller has a hollow structure, and its surface is made of a thermally conductive material. Rotary joints are located on both sides of the tensioning roller, and the rotary joints are sequentially connected to a circulating pump and a water tank.

2. The polymer electrothermal film coating equipment according to claim 1, characterized in that, The glue spraying mechanism includes a transverse module and a glue spraying gun. The transverse module includes a mounting plate, a slide rail, a lead screw, a slider, and a drive motor. The mounting plate is fixed to the side plate of the conveyor belt. The slide rail is disposed on the lower surface of the mounting plate. The lead screw is rotatably disposed in the mounting plate. The drive motor is disposed on one side of the mounting plate and connected to the lead screw through a coupling. The slider is slidably disposed on the slide rail and is threadedly connected to the lead screw. The glue spraying gun is fixed on the slider.

3. The polymer electrothermal film coating apparatus according to claim 1, wherein The adjustment mechanism includes a connecting plate and a tension spring. One end of the connecting plate is hinged to the workbench, and the other end of the connecting plate is fixedly connected to a rotary joint. One end of the tension spring is fixed to the workbench, and the other end of the tension spring is fixed to the upper part of the connecting plate.

4. The polymer electrothermal film coating equipment according to claim 1, characterized in that, The electric heating mechanism includes a heat insulation cover, which is installed on the side plates on both sides of the conveyor belt, and resistance wires are evenly arranged inside the heat insulation cover.

5. The polymer electrothermal film coating equipment according to claim 1, characterized in that, It also includes a bellows and a cooling fan. The bellows is located outside the tensioning device, the cooling fan is installed on the side of the bellows, and louvers are provided on the other side of the bellows.

6. The polymer electrothermal film coating equipment according to claim 1, characterized in that, The lower layer of the workbench is equipped with a raw material placement rack.

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