Polyurethane conductive foam composite aluminum foil coating device

Abstract

The utility model discloses a kind of polyurethane conductive foam composite aluminium foil coating devices, including preforming assembly, thermoforming assembly, heat dissipation component and cutting assembly sequentially arranged along X direction. In preforming assembly, forming groove on the first frame body is arranged along X direction, first reel and second reel arranged up and down extend to forming groove obliquely downwards, limited by first limit strip, aluminium foil is located below foam, pre-wrap piece is heated and shaped by thermoforming assembly, then cooled as finished product by heat dissipation component liquid cooling fan, finally cut off by cutting assembly. Among them, forming groove includes inlet slot of open trapezoidal taper and straight slot;Upper and lower dies of thermoforming assembly form through slot by die clamping, frame body knob can adjust die spacing;Guiding mechanism of cutting assembly positions finished product by splay-shaped guiding portion and adjustable limit portion, motor drives carousel to drive connecting rod and blade reciprocating cutting. Realize the automation of foam and aluminium foil composite coating, suitable for the continuous production of conductive shielding material.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic shielding material processing, specifically to a polyurethane conductive foam composite aluminum foil covering device. Background Technology

[0002] In the fields of electronic equipment manufacturing, electromagnetic shielding, and new energy, composite packaging materials made of polyurethane conductive foam and aluminum foil are widely used due to their combined conductivity, cushioning properties, and shielding functions. The coating quality of these composite materials directly affects the reliability and performance stability of the products; therefore, developing efficient and precise coating devices has become a key focus of the industry.

[0003] In existing technologies, the composite coating process of polyurethane conductive foam and aluminum foil typically employs a step-by-step production line to complete the pre-composite, hot-pressing, and cutting processes. For example, traditional equipment uses a simple roller pressing mechanism to initially bond the two materials, followed by shaping using a hot-pressing mold at a fixed temperature. Heat dissipation largely relies on natural cooling or air cooling, and the cutting process uses a fixed blade holder with manual positioning. While this type of process can achieve basic coating functionality, it has significant shortcomings in terms of material composite precision, thermoforming uniformity, and production efficiency.

[0004] Therefore, the above problems urgently need to be solved. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a polyurethane conductive foam composite aluminum foil wrapping device. Through the integrated continuous layout of pre-forming components, thermoforming components, heat dissipation components and cutting components, it realizes the precise pre-wrapping of polyurethane conductive foam and aluminum foil, uniform hot pressing and shaping, rapid heat dissipation and cooling and high-precision cutting, so as to solve the technical problems of dispersed processes, unstable thermal bonding, low cooling efficiency and poor dimensional consistency of finished products in traditional processes.

[0006] Technical Solution: This utility model provides a polyurethane conductive foam composite aluminum foil coating device, comprising: a preforming component, a thermoforming component, a heat dissipation component, and a cutting component arranged sequentially along the X direction; the preforming component includes a first frame, a forming groove, a first reel, and a second reel. The forming groove is disposed on the first frame along the X direction, and the first and second reels are disposed on the first frame along the Z direction, with the first reel positioned above the second reel. Polyurethane conductive foam is wound on the first reel, and aluminum foil is wound on the second reel. Both the polyurethane conductive foam and the aluminum foil extend obliquely downwards to the forming groove, and the preforming groove is positioned above the forming groove. A first limiting strip is provided to limit the polyurethane conductive foam and aluminum foil within the forming groove, with the aluminum foil located below the polyurethane conductive foam. During the movement of the polyurethane conductive foam and aluminum foil along the X direction, the thermoforming assembly is positioned downstream of the forming groove along the X direction to heat and shape the pre-wrapped part that has moved out of the forming groove along the X direction. The heat dissipation assembly is positioned downstream of the thermoforming assembly along the X direction to dissipate heat and cool the pre-wrapped part after it has been heated and shaped by the thermoforming assembly, thereby forming a finished part. The cutting assembly is positioned downstream of the heat dissipation assembly along the X direction to cut the finished part. The preforming assembly places polyurethane conductive foam and aluminum foil on the first and second reels respectively, with both extending obliquely downwards into the forming groove. Under the action of the first limiting strip, the aluminum foil is limited below the polyurethane conductive foam, achieving preliminary bonding of the two materials to form a pre-wrapped part. The thermoforming assembly is located downstream of the forming groove to heat the pre-wrapped part removed from the forming groove, so that the composite material is shaped and the composite structure is stable. The heat dissipation assembly is located downstream of the thermoforming assembly to dissipate heat and cool the pre-wrapped part after heating and shaping, so that it forms a finished part with stable physical properties. The cutting assembly is located downstream of the heat dissipation assembly to cut the cooled finished part to obtain a product that meets the size requirements.

[0007] Furthermore, this application discloses a polyurethane conductive foam composite aluminum foil coating device, wherein the forming groove includes an inlet groove and a straight groove. The inlet groove is an open trapezoidal shape, and the opening gradually decreases in size along the X direction until it connects with the straight groove. The inlet groove of the forming groove adopts an open trapezoidal design (the opening gradually decreases in size along the X direction and connects to the straight groove), which can provide progressive guidance for the polyurethane conductive foam and the aluminum foil. When the material enters the forming groove, the wide space of the trapezoidal opening facilitates the rapid positioning of the two materials. Subsequently, the material is gradually guided to adhere by the opening contraction, and finally a stable composite structure is formed in the straight groove. The gradual structure of the opening contraction can apply a uniform lateral extrusion force to the two materials, causing the aluminum foil and the polyurethane conductive foam to initially adhere before entering the straight groove.

[0008] Furthermore, this application discloses a polyurethane conductive foam composite aluminum foil coating device. The thermoforming component includes a second frame and a heating component. The heating component is mounted on the second frame and includes an upper mold, a lower mold, and a frame. The upper and lower molds are located within the frame. After the upper and lower molds are closed, they form a through groove. The pre-wrapped part passes through the through groove along the X-direction and is heated within it. When the pre-wrapped part passes through the closed through groove along the X-direction, it receives uniform heating from the upper and lower molds, achieving full-wrap heat conduction. This ensures that the composite interface between the polyurethane conductive foam and the aluminum foil is fully fused and bonded, completing the shaping process. The through groove structure allows the pre-wrapped part to continuously pass through the heating area. Combined with the device's continuous transmission system, a dynamic operation mode of simultaneous movement and heating can be achieved.

[0009] Furthermore, in this application, a polyurethane conductive foam composite aluminum foil coating device is provided with a knob at the upper end of the frame. This knob is used to adjust the positions of the upper and lower dies in the Z-direction. By rotating the knob at the upper end of the frame, the relative positions of the upper and lower dies in the Z-direction can be precisely adjusted, thereby changing the vertical spacing of the through-slots (i.e., the extrusion gap when the pre-wrapped part passes through). This function allows the device to dynamically match appropriate thermoforming pressure based on the thickness difference between the polyurethane conductive foam and the aluminum foil, ensuring that different material combinations achieve the desired composite effect.

[0010] Furthermore, this application discloses a polyurethane conductive foam composite aluminum foil covering device. The heat dissipation component includes a third frame and a liquid-cooled fan. The liquid-cooled fan is mounted on the third frame and positioned below the pre-wrapped part, with its air outlet facing upwards towards the pre-wrapped part. The liquid-cooled fan of the heat dissipation component, mounted on the third frame and positioned below the pre-wrapped part with its air outlet facing upwards towards the pre-wrapped part, can form a bottom-up directional cooling airflow. Through the synergistic effect of the liquid cooling system and the fan, forced convection heat dissipation is achieved on the thermoformed pre-wrapped part, rapidly reducing the temperature of the composite layer.

[0011] Furthermore, this application discloses a polyurethane conductive foam composite aluminum foil covering device. The cutting assembly includes a fourth frame, a guide groove, a lower cutting mechanism, and a guiding mechanism. The guide groove is mounted on the fourth frame. The lower cutting mechanism is mounted on the guide groove and located at the end of the guide groove away from the heat dissipation component. The guiding mechanism is located within the guide groove to guide the finished part directly below the lower cutting mechanism. The guide groove of the cutting assembly is mounted on the fourth frame, and the internal guiding mechanism can provide linear constraint guidance for the cooled finished part, ensuring that the finished part is smoothly transported along the X-direction directly below the lower cutting mechanism, avoiding deviation or shaking, and providing a positioning reference for precise cutting.

[0012] Furthermore, in this application, a polyurethane conductive foam composite aluminum foil covering device includes a guiding mechanism comprising a pair of baffles, which are correspondingly disposed on the inner sides of a guide groove. A set of adjusting rods is passed through the baffles, and the adjusting rods are adjustable along the Y direction. A baffle plate is installed at the end of the adjusting rod away from the baffle, and the baffle plate consists of a limiting part and a guiding part. The two corresponding limiting parts are arranged parallel to each other along the X direction. After passing between the two limiting parts, the finished part enters the cutting mechanism. The two corresponding guiding parts are V-shaped, with one end connected to the limiting part, and the finished part enters from the V-shaped opening end. A pair of baffles in the guiding mechanism can move along the Y direction via an adjusting rod, which can change the distance between the two limiting parts, thereby dynamically adapting to the width of the finished part. The open end of the figure-eight guide (the width of which is greater than the distance between the limiting parts) forms a material inlet buffer, guiding the finished part to automatically align to the center position between the two limiting parts, ensuring accurate cutting and positioning. The limiting parts of the baffle are set parallel to the X direction, forming a rigid constraint on both sides of the finished part to prevent it from shifting laterally during the conveying process. The figure-eight structure of the guide applies a lateral thrust to the finished part that deviates from the center through the inclined surface, automatically correcting the conveying trajectory.

[0013] Furthermore, in this application, a polyurethane conductive foam composite aluminum foil coating device includes a cutting mechanism comprising a first upright frame mounted on a fourth frame along the Z-direction. A motor is mounted at the top of the first upright frame, and a turntable is mounted on the output shaft of the motor. The output shaft is positioned along the Y-direction, and a connecting rod is mounted on the turntable. The cutting mechanism also includes a second upright frame spanning a guide groove. A guide hole is provided on the second upright frame along the Z-direction, and the connecting rod passes through the guide hole. A blade is mounted on the end of the connecting rod furthest from the turntable. The motor drives the turntable to rotate, thereby driving the connecting rod to reciprocate up and down along the guide hole, which in turn drives the blade to cut the finished part. The crank-connecting rod mechanism converts the rotational motion of the motor into the linear motion of the blade, enabling high-frequency and stable cutting of the finished parts conveyed by the guiding mechanism, meeting the needs of continuous production.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0015] 1. The polyurethane conductive foam composite aluminum foil coating device of this utility model uses the open trapezoidal forming groove design of the preforming component to progressively guide and laterally extrude the polyurethane conductive foam and aluminum foil. Combined with the precise positioning of the first limiting strip, it realizes the rapid positioning and initial uniform bonding of the two materials. At the same time, the adjustable upper and lower mold structure of the thermoforming component dynamically matches the thermoforming pressure of different material thicknesses through the knob. Combined with the fully enclosed uniform heating of the closed through groove, it ensures that the composite interface is fully melted and bonded, solving the problems of low composite accuracy and poor thermoforming uniformity in traditional processes.

[0016] 2. The polyurethane conductive foam composite aluminum foil covering device of this utility model uses a liquid-cooled fan in the heat dissipation component to force convection heat dissipation structure, which directionally cools the pre-wrapped part after thermoforming from bottom to top, greatly improving heat dissipation efficiency compared with traditional natural cooling or air cooling; at the same time, the figure-eight guide part and adjustable limiting part of the cutting component, together with the crank connecting rod cutting mechanism, realize automatic alignment of finished parts, rigid constraint and high-frequency stable cutting, which solves the problems of low cooling efficiency, poor consistency of finished product size and large manual positioning error in traditional processes, and significantly improves production continuity and processing accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a polyurethane conductive foam composite aluminum foil covering device according to the present invention.

[0018] Figure 2 This is a partially enlarged schematic diagram of a preformed component of a polyurethane conductive foam composite aluminum foil covering device according to this utility model.

[0019] Figure 3 This is a schematic diagram of the thermoforming component, heat dissipation component, and cutting component of a polyurethane conductive foam composite aluminum foil coating device according to the present invention.

[0020] Figure 4 This is a schematic diagram of the guiding mechanism in a polyurethane conductive foam composite aluminum foil covering device of this utility model.

[0021] Explanation of reference numerals on the accompanying drawings:

[0022] 1-Preformed component, 11-First frame, 12-Forming groove, 121-Inlet groove, 122-Straight groove, 13-First reel, 14-Second reel, 15-First limiting strip;

[0023] 2-Thermoforming component, 21-Second frame, 22-Heating component, 221-Upper mold, 222-Lower mold, 223-Frame, 224-Through groove, 225-Knob;

[0024] 3-Heat dissipation components, 31-Third frame, 32-Liquid cooling fan;

[0025] 4-Cutting assembly, 41-Fourth frame, 42-Guide groove, 43-Lower cutting mechanism, 431-First upright, 432-Motor, 433-Turntable, 434-Connecting rod, 435-Second upright, 436-Guide hole, 437-Blade, 44-Guide mechanism, 441-Baffle, 442-Adjusting rod, 443-Baffle plate, 4431-Limiting part, 4432-Guide part. Detailed Implementation

[0026] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] like Figure 1-4 As shown, a specific embodiment of a polyurethane conductive foam composite aluminum foil coating device is as follows:

[0029] Working process of preformed component 1

[0030] The preformed assembly 1 includes a first frame 11, with a forming groove 12 fixed to the first frame 11 along the X direction. A first reel 13 and a second reel 14 are arranged vertically along the Z direction on the first frame 11, with the first reel 13 located above and wound with polyurethane conductive foam, and the second reel 14 located below and wound with aluminum foil. Both materials extend obliquely downward from the reels to the forming groove 12. A first limiting strip 15 is provided above the forming groove 12 to limit the polyurethane conductive foam and aluminum foil within the forming groove 12, with the aluminum foil always located below the polyurethane conductive foam.

[0031] The forming groove 12 consists of an inlet groove 121 and a straight groove 122. The inlet groove 121 is an open trapezoid with the opening gradually narrowing along the X direction and connecting to the straight groove 122. When the polyurethane conductive foam and aluminum foil enter the inlet groove 121, the wide space of the trapezoidal opening guides the material to be quickly positioned. Subsequently, the opening narrows to generate lateral extrusion force, which promotes the initial bonding of the two materials. Finally, a stable pre-wrap is formed in the straight groove 122 and conveyed to the thermoforming assembly 2 along the X direction.

[0032] Heating and shaping of thermoformed component 2

[0033] The thermoforming component 2 includes a second frame 21 and a heating component 22. The heating component 22 is mounted on the second frame 21 and has an upper mold 221, a lower mold 222, and a frame 223 inside. After the upper mold 221 and the lower mold 222 are closed, a through groove 224 is formed. When the pre-wrapped part passes through the through groove 224 in the X direction, it receives uniform heating from the upper and lower molds, realizing the fusion bonding of the composite interface.

[0034] A knob 225 is provided on the upper end of the frame 223. By rotating the knob 225, the relative position of the upper mold 221 and the lower mold 222 in the Z direction can be adjusted, thereby changing the vertical spacing of the through groove 224 to adapt to polyurethane conductive foam and aluminum foil of different thicknesses, ensuring that the thermoforming pressure is precisely adjustable.

[0035] Cooling treatment of heat dissipation component 3

[0036] The heat dissipation assembly 3 includes a third frame 31 and a liquid cooling fan 32. The liquid cooling fan 32 is installed on the third frame 31 and located below the pre-wrapped part, with its air outlet facing upwards towards the pre-wrapped part. After being shaped by the thermoforming assembly 2, the pre-wrapped part enters the heat dissipation assembly 3 along the X direction. Through the synergistic effect of the liquid cooling system and the fan, the liquid cooling fan 32 generates a bottom-up directional cooling airflow, which forces convection heat dissipation on the pre-wrapped part, rapidly reducing its temperature and forming a finished part with stable physical properties.

[0037] Precise cutting of cutting component 4

[0038] The cutting assembly 4 includes a fourth frame 41, a guide groove 42, a cutting mechanism 43, and a guiding mechanism 44. The guide groove 42 is fixed to the fourth frame 41, and the internal guiding mechanism 44 is used to position the finished part. The guiding mechanism 44 includes a pair of baffles 441, which are correspondingly arranged on both sides of the guide groove 42. Multiple sets of adjusting rods 442 are passed through the baffles 441. The adjusting rods 442 can move along the Y direction, and their ends are equipped with baffle plates 443. The baffle plates 443 consist of limiting parts 4431 and guiding parts 4432. The two limiting parts 4431 are arranged parallel to each other along the X direction to form a conveying channel for the finished part. The guiding parts 4432 are V-shaped, and the width of the opening end is greater than the distance between the limiting parts 4431, which is used to guide the finished part to automatically align to the center position.

[0039] The cutting mechanism 43 is mounted on the end of the guide groove 42 away from the heat dissipation component 3, and includes a first frame 431 and a second frame 435. The first frame 431 is installed on the fourth frame 41 along the Z direction, and a motor 432 is fixed at its top. The output shaft of the motor 432 is connected to a turntable 433 along the Y direction. The turntable 433 is connected to the blade 437 through a connecting rod 434. The second frame 435 spans the guide groove 42 and has a guide hole 436. The connecting rod 434 passes through the guide hole 436 and can reciprocate along the Z direction. When the motor 432 drives the turntable 433 to rotate, the connecting rod 434 drives the blade 437 to move up and down along the guide hole 436, performing high-frequency and stable cutting on the finished part conveyed by the guide mechanism 44, and finally obtaining a product that meets the size requirements.

[0040] Work process summary

[0041] Polyurethane conductive foam and aluminum foil are released from the first reel 13 and the second reel 14, pre-composite into a pre-wrapped part through the forming groove 12, then heated and shaped by the thermoforming assembly 2, and cooled into a finished part by the heat dissipation assembly 3. Finally, the part is positioned by the guiding mechanism 44 of the cutting assembly 4 and cut by the cutting mechanism 43, realizing automated continuous production. The entire process, through the synergistic effect of each component, solves the problems of low composite accuracy, slow cooling efficiency and large cutting error in traditional processes, significantly improving the production efficiency and processing quality of conductive shielding materials.

[0042] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A polyurethane conductive foam composite aluminum foil coating device, characterized in that: include: The preforming component (1), thermoforming component (2), heat dissipation component (3), and cutting component (4) are arranged sequentially along the X direction. The preformed component (1) includes a first frame (11), a forming groove (12), a first reel (13), and a second reel (14). The forming groove (12) is disposed on the first frame (11) along the X direction. The first reel (13) and the second reel (14) are disposed on the first frame (11) along the Z direction, with the first reel (13) positioned above the second reel (14). Polyurethane conductive foam is wound on the first reel (13), and aluminum foil is wound on the second reel (14). Both the conductive foam and the aluminum foil extend obliquely downward to the forming groove (12). A first limiting strip (15) is provided above the forming groove (12). The first limiting strip (15) is used to limit the polyurethane conductive foam and the aluminum foil in the forming groove (12). The aluminum foil is located below the polyurethane conductive foam. During the movement of the polyurethane conductive foam and the aluminum foil in the X direction, the thermoforming component (2) is located downstream of the forming groove (12) in the X direction and is used to heat and shape the pre-wrapped part that moves out of the forming groove (12) in the X direction. The heat dissipation component (3) is located downstream of the thermoforming component (2) along the X direction and is used to dissipate heat and cool the pre-wrapped part after it has been heated and shaped by the thermoforming component (2) to form a finished part. The cutting component (4) is located downstream of the heat dissipation component (3) along the X direction and is used to cut the finished part.

2. The polyurethane conductive foam composite aluminum foil coating device according to claim 1, characterized in that: The forming groove (12) includes an inlet groove (121) and a straight groove (122). The inlet groove (121) is an open trapezoid with the opening gradually decreasing in size along the X direction until it connects with the straight groove (122).

3. The polyurethane conductive foam composite aluminum foil coating device according to claim 1, characterized in that: The thermoforming component (2) includes a second frame (21) and a heating component (22). The heating component (22) is installed on the second frame (21). The heating component (22) includes an upper mold (221), a lower mold (222), and a frame (223). The upper mold (221) and the lower mold (222) are located inside the frame (223). After the upper mold (221) and the lower mold (222) are closed, a through groove (224) is formed. The pre-wrapped part passes through the through groove (224) in the X direction and is heated in the through groove (224).

4. The polyurethane conductive foam composite aluminum foil coating device according to claim 3, characterized in that: The upper end of the frame (223) is provided with a knob (225), which is used to adjust the position of the upper mold (221) and the lower mold (222) in the Z direction.

5. The polyurethane conductive foam composite aluminum foil coating device according to claim 1, characterized in that: The heat dissipation component (3) includes a third frame (31) and a liquid cooling fan (32). The liquid cooling fan (32) is mounted on the third frame (31) and located below the pre-wrapped part. The air outlet of the liquid cooling fan (32) is directed upward toward the pre-wrapped part.

6. The polyurethane conductive foam composite aluminum foil coating device according to claim 1, characterized in that: The cutting assembly (4) includes a fourth frame (41), a guide groove (42), a cutting mechanism (43), and a guiding mechanism (44). The guide groove (42) is installed on the fourth frame (41). The cutting mechanism (43) is mounted on the guide groove (42) and located at one end of the guide groove (42) away from the heat dissipation assembly (3). The guiding mechanism (44) is located in the guide groove (42) to guide the finished part directly below the cutting mechanism (43).

7. The polyurethane conductive foam composite aluminum foil coating device according to claim 6, characterized in that: The guiding mechanism (44) includes a pair of baffles (441), which are respectively disposed on the two inner sides of the guide groove (42). A set of adjusting rods (442) are passed through the baffles (441). The adjusting rods (442) can be adjusted and moved along the Y direction. A baffle plate (443) is installed at the end of the adjusting rod (442) away from the baffle (441). The baffle plate is composed of a limiting part (4431) and a guiding part (4432). The two corresponding limiting parts (4431) are arranged parallel along the X direction. After the finished part passes between the two limiting parts (4431), it enters the cutting mechanism (43). The two corresponding guiding parts (4432) are in the shape of an octagon, with one end connected to the limiting part (4431). The finished part enters from the opening end of the octagon.

8. The polyurethane conductive foam composite aluminum foil coating device according to claim 6, characterized in that: The cutting mechanism (43) includes a first stand (431), which is mounted on a fourth frame (41) along the Z direction. A motor (432) is mounted on the top of the first stand (431), and a turntable (433) is mounted on the output shaft end of the motor (432). The output shaft is arranged along the Y direction, and a connecting rod (434) is mounted on the turntable (433). The cutting mechanism (43) also includes a second stand (435), which is mounted across the guide groove (42). The second stand (435) has a guide hole (436) along the Z direction, and the connecting rod (434) passes through the guide hole (436). A blade (437) is mounted on the end of the connecting rod (434) away from the turntable (433). The motor (432) drives the turntable (433) to rotate, thereby driving the connecting rod (434) to move up and down along the guide hole (436), which in turn drives the blade (437) to cut the finished part.

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