Heat insulation pad packaging method and packaging equipment

Abstract

The invention relates to the technical field of new energy automobile power battery heat management, in particular to a heat insulation pad packaging method and packaging equipment. The method comprises the following steps (a) or (b): (a) mechanically laminating a laminated layer consisting of a lower packaging film, a silica gel frame and a heat-insulating core material, so that the packaging film is attached to the surface consisting of the silica gel frame and the heat-insulating core material and is shaped; and heating and pressurizing the shaped laminated layer so as to finish the final packaging. And (b) enabling the laminated layer to pass through a press-fit device which is configured to finish shaping and heating and pressurizing packaging of the laminated layer at the same time in a single press-fit operation. According to the invention, differentiated and precise pressure and heat effects are carried out on different functional areas, so that the reliability and high efficiency of the packaging process are ensured.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology for power batteries in new energy vehicles, and in particular to a method and equipment for encapsulating a heat insulation pad. Background Technology

[0002] With the rapid increase in the market share of new energy vehicles, the thermal safety of power batteries has become a focus of social concern. To prevent the spread of heat and flames in the event of battery thermal runaway, the industry generally installs composite thermal insulation pads (such as aerogel thermal insulation pads) that combine heat insulation and buffering functions between battery cells to ensure personal and property safety.

[0003] Currently, there is a type of heat insulation pad on the market, such as... Figure 1 As shown, the heat insulation pad has a U-shaped frame 101 made of rigid silicone rubber, and the frame is filled with silica aerogel felt as the heat insulation core material 102. It is then heat-sealed by upper and lower polymer encapsulation films (upper encapsulation film 103 and lower encapsulation film 104, such as PI or PET film). The above-mentioned heat insulation pad is designed to simultaneously meet the three core functional requirements of heat insulation, flame retardancy, and cushioning.

[0004] However, the aforementioned thermal insulation pads face the following technological bottlenecks in large-scale automated manufacturing: To ensure cushioning performance, the thickness of the silicone frame is typically greater than that of the thermal insulation core, resulting in a significant stepped height difference between the two. In the final thermoforming process, the rigid frame and the flexible aerogel respond differently to pressure, causing the encapsulation film to easily produce uncontrollable wrinkles, stretching, or even tearing when covering the stepped area. Simultaneously, interfacial gases are difficult to expel, leading to bubbles or incomplete sealing. This "height difference between the rigid frame and the thin core" problem directly results in stringent requirements for equipment and alignment precision in the encapsulation process, difficulties in process control, and unstable product yield, thereby increasing production costs and severely restricting the large-scale, low-cost manufacturing of this high-performance product.

[0005] To address the aforementioned challenges in packaging quality and efficiency, existing technologies offer various approaches, but all have significant limitations. For example, the applicant's patent application with publication number CN113651592A discloses a method for preparing a buffered silica aerogel thermal insulation sheet. This method involves placing a silicone frame into the fiber felt stage and then integrally molding it through a lengthy chemical wet process including sol-gel and drying. While this process route aims to integrate the process from the source, its extremely long process chain, high energy consumption, and daily production cycle make it unsuitable for rapid, large-scale production needs, and the final product still faces the challenge of thermoforming.

[0006] For example, patent application CN117048076A discloses a method for preparing a heat insulation pad. This method solves the deformation problem of the silicone frame during storage and transportation by introducing a rigid support frame, thereby improving the alignment accuracy and efficiency of automated assembly. However, this solution mainly optimizes the assembly process and does not address the aforementioned technological challenge of "the height difference between the rigid frame and the thin core material leading to uncontrollable hot-press packaging quality." Its packaging process still relies on the traditional, one-step hot-press method, which has extremely high precision requirements, and the problem of large yield fluctuations remains unresolved.

[0007] In addition to the two typical methods mentioned above, existing technologies also include solutions aimed at reducing costs, such as using foamed frames and adhesive-saving encapsulation films. However, these often come at the cost of sacrificing the mechanical strength of the materials and long-term sealing reliability, and thus cannot meet the high safety standards of automotive-grade products.

[0008] In summary, existing technological solutions, when addressing the aforementioned "height difference" issue, sacrifice efficiency and cost to ensure quality, while simplifying processes and reducing costs makes it difficult to guarantee packaging reliability. This makes it consistently difficult to achieve efficient, low-cost mass production of thermal insulation pads while ensuring high product reliability. Summary of the Invention

[0009] The purpose of this invention is to provide a method for encapsulating heat insulation pads to solve the problems of encapsulation film wrinkles, poor bonding of core material areas, and low production efficiency caused by traditional processes.

[0010] Furthermore, the present invention aims to provide a heat insulation pad encapsulation device that can be used to implement the above-described method.

[0011] To solve the above problems, the heat insulation pad encapsulation method of the present invention adopts the following technical solution: A method for encapsulating a thermal insulation pad includes the following steps (a) or (b): (a) First, the stack consisting of the lower encapsulation film, the silicone frame and the heat insulation core material is mechanically pressed to make the encapsulation film adhere to the surface formed by the silicone frame and the heat insulation core material and shape it; then, the shaped stack is heated and pressurized to complete the final encapsulation. (b) Passing the stack through a pressing device, wherein the pressing device is configured to simultaneously shape and heat-pressurize the stack in a single pressing operation.

[0012] Furthermore, in step (a), the mechanical pressing is achieved by a pair of pre-pressing rollers; the roller pressing surfaces of the pre-pressing rollers are covered with an elastic material layer, or the roller pressing surfaces of the pre-pressing rollers are provided with a local hard pressing platform corresponding to the position of the heat insulation core material; in step (b), the pressing device is a pair of pressing rollers, and the roller pressing surfaces are provided with a local protrusion structure corresponding to the position of the heat insulation core material.

[0013] Furthermore, the elastic modulus of the elastic material layer ranges from 0.6 MPa to 1.2 MPa; the single-sided distance between the edge of the localized rigid pressing platform and the projected edge of the thermal insulation core material is from 0.5 mm to 3 mm.

[0014] Furthermore, the single-sided distance between the edge of the local protrusion structure and the projected edge of the thermal insulation core material is 0.5mm to 3mm.

[0015] Furthermore, the silicone frame is a strip-shaped frame continuously arranged along the production line conveying direction; the method also includes the step of cutting the continuously packaged product into independent units.

[0016] Furthermore, the thermal insulation core material comprises any one or more of the following: a fiber material layer, a fiber-reinforced aerogel composite material layer, a phase change material layer, a strain material layer, and an elastic layer.

[0017] The beneficial effects of the heat insulation pad encapsulation method of the present invention: The heat insulation pad encapsulation method of the present invention is a pioneering invention. The present invention solves the encapsulation problem of U-shaped frame heat insulation pads by coordinating the shaping and bonding steps in the heat insulation pad production process. In step (a), the pre-pressing rollers first perform gentle mechanical pressing on the overall laminate of the silicone frame and core material, completing preliminary shaping and venting, eliminating wrinkles; subsequently, the hot pressing device with protrusions then performs concentrated heating and pressurization on the core material area to achieve a final, firm bond. In step (b), the pressing rollers with locally raised structures simultaneously complete the concentrated pressure bonding of the core material area and the bonding of the silicone frame area in one operation. Both paths ensure high reliability of the core material interface bonding by applying differentiated and precise pressure to different areas and achieve highly efficient continuous automated production.

[0018] The heat insulation pad encapsulation device of the present invention adopts the following technical solution: An insulating pad encapsulation device, the device being configured to perform either (A) or (B) the following operation: (A) First, the stack consisting of a lower encapsulation film, a silicone frame, and a heat insulation core is mechanically pressed to make the encapsulation film adhere to the surface formed by the silicone frame and the heat insulation core and set the shape; then, the set stack is heated and pressurized to complete the final encapsulation; wherein, the equipment performing operation (A) includes: a shaping device for mechanically pressing the stack; and an encapsulation device disposed downstream of the shaping device for heating and pressurizing the set stack. (B) Passing the stack through a pressing device, wherein the pressing device is configured to simultaneously shape and heat pressurize the stack in a single pressing operation; wherein the pressing device in the equipment performing operation (B) is a pair of pressing rollers, the roller surfaces of which are provided with local protrusions corresponding to the position of the thermal insulation core material.

[0019] Furthermore, during operation (A), the shaping device is a pair of pre-pressing rollers; the roller pressing surfaces of the pre-pressing rollers are covered with an elastic material layer; or the roller pressing surfaces of the pre-pressing rollers are provided with localized hard pressing platforms corresponding to the position of the heat insulation core material.

[0020] Furthermore, the elastic modulus of the elastic material layer ranges from 0.6 MPa to 1.2 MPa; the single-sided distance between the edge of the localized rigid pressing platform and the projected edge of the thermal insulation core material is from 0.5 mm to 3 mm.

[0021] Furthermore, when performing operation (B), the single-sided distance between the edge of the local protrusion structure and the projected edge of the thermal insulation core material is 0.5 mm to 3 mm.

[0022] Furthermore, the equipment is configured to process silicone frames having strip-shaped frames continuously arranged along the production line conveying direction, and includes a die-cutting device for slitting continuously packaged products into individual units.

[0023] Furthermore, the thermal insulation core material comprises any one or more of the following: a fiber material layer, a fiber-reinforced aerogel composite material layer, a phase change material layer, a strain material layer, and an elastic layer.

[0024] The beneficial effects of the thermal insulation pad encapsulation device of the present invention: The thermal insulation pad encapsulation device of the present invention is a pioneering invention. The device of the present invention achieves efficient and high-quality encapsulation of the U-shaped frame thermal insulation pad through hardware integration. For the device performing operation (A), its shaping device first mechanically presses the entire stack to complete the shaping; the downstream encapsulation device then reinforces the core material area with a hot press head featuring a boss. For the device performing operation (B), its integrated pressing device simultaneously completes the stamping bonding of the core material area and the bonding of the frame area in a single pass. Both device architectures ensure the reliability and high efficiency of the encapsulation process by applying differentiated and precise pressure and heat to different functional areas. Attached Figure Description

[0025] Figure 1 This is an exploded view of an aerogel thermal insulation pad; Figure 2 A schematic diagram of the structure of one of the pre-pressing rollers (hot pressing rollers) in the pre-pressing roller pair; Figure 3 This is a schematic diagram of the structure of one of the pressing rollers in one embodiment of the pressing rollers; Figure 4 This is a schematic diagram of the structure of one of the pressing rollers in another embodiment of the pressing rollers; Figure 5 This is a schematic diagram of the pressing rollers pressing the aerogel insulation pad stack. Figure 6 This is a structural diagram of the pressure head (upper pressure head, lower pressure head); Figure 7 This is a structural diagram of the fabric panel.

[0026] Figure 1 In the middle: 101, the U-shaped frame; 102, the heat insulation core material; 103, the upper sealing film; 104, the lower sealing film.

[0027] Figures 2 - 7 In the middle: 201, silicone frame; 202, heat insulation core material; 203, fabric plate; 204, pre-pressing rollers; 2041, elastic material layer; 205, pressure head; 2051, hard boss; 301, pressing rollers; 3011, local protrusion structure. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Where there is no conflict, technical features in different embodiments can be combined with each other.

[0029] The specific implementation method of the heat insulation pad encapsulation method of the present invention is as follows: Example 1 of the heat insulation pad encapsulation method of the present invention: This example corresponds to step (a) in claim 1. Its core inventive concept lies in solving the problems of encapsulation film wrinkles caused by height differences, insufficient pressure in the core material area, and consequently poor interface bonding and high-temperature bulging in the traditional one-step hot-pressing method by using a sequential synergy of "pre-pressing and shaping followed by hot-pressing for strengthening." In this example, the method of the present invention is specifically implemented according to the following steps: S1. Material preparation and loading: We provide a lower encapsulation film and an upper encapsulation film, pre-cut to a specified size (e.g., 100mm × 80mm, thickness T). core The thermal insulation core material (aerogel thermal insulation core material in this embodiment) and the silicone frame (U-shaped frame).

[0030] The upper and lower encapsulation films are multi-layered composite structures. Preferably, at least one encapsulation film is a double-sided adhesive integrated film, whose structure, from the outside to the inside, may include: a release film, an acrylic pressure-sensitive adhesive layer, a PET substrate layer, and an epoxy resin hot melt adhesive layer. This design allows the heat insulation pad to have a strong adhesive backing after encapsulation, eliminating the need for a separate adhesive backing application later. In the preferred continuous production mode of this embodiment, the silicone frame is a continuous strip-shaped frame. Its shape is a strip of silicone extending continuously along the production line conveying direction, with multiple through holes (i.e., receiving portions) for accommodating the heat insulation core material continuously and at equal intervals on the strip of silicone (or formed by molding). The overall thickness T of the silicone frame is... frame Greater than the thickness T of the insulation core material core This creates a height difference structure. Using continuous strip frames enables automated material supply and uninterrupted continuous production throughout the entire process. It should be understood that in other embodiments or production modes, the silicone frame can also be a pre-die-cut single U-shaped frame, which is then sequentially and intermittently laid on the lower encapsulation film by an automatic feeding mechanism to meet the flexible production needs of small batches and multiple specifications.

[0031] S2. Stacked assembly: The lower encapsulation film is laid on a continuously running conveyor belt, and then the continuous strip silicone frames 201 (or individual frames) are laid on the lower encapsulation film according to the set positions. Next, the heat insulation core material, i.e., the heat insulation core material 202, is placed one by one into each receiving part of the silicone frame. Finally, the upper encapsulation film is covered on the entire stack.

[0032] To improve assembly accuracy, especially when using a single frame, after laying the lower encapsulation film, a fabric plate 203 with multiple rows of cavities can be placed first (e.g., Figure 7 As shown, the silicone frame 201 is placed into the corresponding cavity to obtain stable support and positioning. The fabric plate 203 can be automatically removed and reused before or after subsequent pressing steps, and its material can be, for example, epoxy resin.

[0033] S3. Pre-compression and shaping: The above-mentioned layers are passed through a pair of pre-pressing rollers 204 (e.g. Figure 2 As shown), preliminary mechanical pressing is performed. This step is carried out below the complete activation temperature of the epoxy hot melt adhesive, and its main function is to achieve physical shaping and preliminary bonding, creating a smooth and stable intermediate product for subsequent hot pressing. Regarding the pre-pressing rollers, the following two structures can be selected: A. Elastic Pressing: The pressing surfaces of the pre-pressing rollers 204 are covered with an elastic material layer 2041. This elastic material layer is, for example, closed-cell foam, with an elastic modulus preferably between 0.6 MPa and 1.2 MPa, and a thickness, for example, 10 mm. This specific combination of modulus range and thickness allows it to produce sufficient and uniform adaptive deformation under pressure, thereby applying effective pressure simultaneously to the raised silicone frame area and the recessed core area, expelling most of the air between the layers, and initially adhering the encapsulation film to the surface of the frame and the core, eliminating macroscopic wrinkles.

[0034] B. Rigid Pressing: On the roller pressing surface of the pre-pressing rollers, multiple localized rigid pressing platforms are fixedly arranged along the circumference of the support rollers. The position of each localized rigid pressing platform precisely corresponds to the position of the heat insulation core material being conveyed. The planar projected area of ​​the localized rigid pressing platform is smaller than the projected area of ​​the heat insulation core material. Specifically, based on the core material projection, the pressing platform is recessed inward at each edge, and the single-sided spacing is designed to be 0.5mm to 3mm. The thickness of the pressing platform itself can be designed according to the product structure, for example, based on (the thickness T of the finished silicone frame). frame - Insulation core material thickness T core Based on the value of ) / 2, subtract 0.05 mm to 0.2 mm.

[0035] This invention introduces an independent "pre-compression and shaping" step. In method A above, the combination of "elastic modulus of 0.6-1.2 MPa" and "10 mm thickness" of the elastic material layer is an optimized parameter determined through repeated experiments. It ensures effective shaping under mild conditions while avoiding damage to the brittle core material, which is not common knowledge or a conventional choice in the art. In method B above, the "circumferential arrangement of the localized hard pressing platform," the "area reduction design (0.5-3 mm spacing)," and the "thickness calculation formula based on the product thickness difference (T)" are all included. frame - T core The solution, consisting of two interconnected methods (1) and 2), enables continuous, precise, and efficient pre-pressing. Both methods directly address the issue of uneven initial lamination caused by height differences, laying the foundation for subsequent high-quality hot pressing.

[0036] S4. Hot-press reinforced packaging: The flat and stable "preformed part" formed after pre-compression and shaping is transferred to the hot pressing device for final packaging.

[0037] like Figure 6 As shown, rigid bosses 2051 are fixed on the upper and lower pressure heads 205 of the hot pressing device at positions corresponding to the heat insulation core material area. The rigid bosses 2051 can be installed by magnetic attraction, adhesive, or bolts, and their material can be epoxy resin board, acrylic, stainless steel, or carbon steel, etc. To ensure that the rigid bosses do not scratch the upper and lower sealing films during the hot pressing process, all working edges of the bosses are processed into chamfers or rounded corners. The planar dimensions of the rigid bosses are slightly smaller than the dimensions of the heat insulation core material (e.g., 1 mm smaller on each side). Their height H is calculated using the formula H = (Silicone frame thickness T) / (T * (Silicone frame thickness T)). frame - Insulation core material thickness T core ) / 2 determines. For example, when T frame =2mm, T core When H = 1 mm, H = 0.5 mm.

[0038] The pre-pressing steps S4 and S3 complement each other. The flat intermediate body produced by the pre-pressing step ensures high-precision alignment of the rigid boss. The boss height design incorporates the product's inherent structural dimensions (T). frame , T core This directly translates into process control parameters that determine the final packaging quality. It ensures that the core material area receives precise, controllable, and sufficient compression and compressive stress during hot pressing, allowing the epoxy resin layer in this area to be fully activated, flow, and form a dense, gapless interfacial bond at high temperatures. This fundamentally eliminates the hidden dangers caused by insufficient pressure in the core material area in traditional processes. The synergy between pre-compression and hot pressing with bosses produces unexpected technical effects.

[0039] S5. Die-cutting: The continuous strip-shaped packaged product, after being strengthened by heat pressing, is cut into individual heat insulation pads. Depending on the different requirements for efficiency, precision, and flexibility in production, various mature die-cutting technologies can be used: for example, rotary die-cutting can be used, where the product is drawn to a rotary die-cutting machine, and high-speed online continuous cutting is performed using a set of rotary blades designed to match the product spacing; this is the most efficient method. Besides rotary die-cutting, straight die-cutting or laser cutting can also be used. Straight die-cutting is used for products with extremely strict dimensional tolerance requirements; the continuous product is first cut into segments, and then high-precision straight dies are used for punching. Laser cutting involves using a vision system for positioning and then using a laser cutting machine for non-contact cutting; it is suitable for flexible production of multiple varieties and small batches, and there is no blade wear.

[0040] Embodiment 2 of the heat insulation pad encapsulation method of the present invention: This embodiment corresponds to step (b) in claim 1, and its material preparation (S1) and stacking assembly (S2) steps are the same as or similar to those in Embodiment 1. The main difference is that by designing an integrated chemical assembly with a specific structure, the two functions of "shaping" and "final encapsulation" are completed simultaneously at the same time and in the same workstation, thereby achieving the ultimate improvement in production efficiency while ensuring basic encapsulation quality.

[0041] In addition to the steps described above, it also includes an integrated press-fit packaging step. The stack is passed through a pair of special press-fit rollers 301 (such as...). Figures 3 - 5 (As shown). On the pressing surface of the pressing rollers 301, local protrusion structures 3011, corresponding one-to-one with the positions of the heat insulation core material, are fixedly provided along the circumference of the support rollers. These local protrusion structures are equivalent in material and function to the local hard pressing platform described in step S3 of Example 1, and their edges maintain a single-sided distance of 0.5 mm to 3 mm from the projected edge of the core material. Figure 3 , Figure 4 As shown, the local protrusion structure 3011 can be either arc-shaped or planar tooth-shaped.

[0042] like Figure 5 As shown, the pressing rollers integrate heating functionality. When they rotate and press the laminated layers, the locally raised structures apply concentrated, high-pressure heat and pressure to the core material area, simultaneously completing the "stamping and shaping" and "thermal fusion bonding" of that area in an instant. Simultaneously, the base surface of the rollers (non-raised areas) presses and adheres the silicone frame area. Compared to Example 1, this embodiment does not simply merge the two steps, but rather achieves functional integration through the design of a dedicated tool: a "heated roller with specific locally raised structures." The circumferentially arranged locally raised structures and the designed 0.5-3mm spacing ensure differentiated and efficient processing of the core material and frame areas at different heights within a very short time during dynamic rolling. It eliminates the traditional multi-equipment, multi-station layout, significantly simplifying the production line, reducing equipment complexity and floor space, while still ensuring reliable packaging quality, achieving an optimized balance between efficiency and quality.

[0043] In the above embodiments, the thermal insulation core material specifically uses glass fiber reinforced aerogel felt. However, in other embodiments, the thermal insulation core material may also include any one or more of the following: a fiber material layer, a fiber-reinforced aerogel composite material layer, a phase change material layer, a strain material layer, and an elastic layer. The fiber material layer is selected from one or more of glass fiber felt, pre-oxidized fiber felt, and ceramic fiber felt. The fiber-reinforced aerogel composite material layer is selected from one or more of the following: glass fiber reinforced aerogel felt, pre-oxidized fiber reinforced aerogel felt, ceramic fiber reinforced aerogel felt, and thermal insulation sheets obtained by mixing and pressing thermal insulation powders such as aerogel powder with reinforcing fibers. The thermal insulation powders include aerogel, fumed silica, and light-blocking agents. The elastic layer can be various types of foam such as polyethylene foam, melamine foam, and polyurethane foam.

[0044] The specific embodiments of the heat insulation pad encapsulation device of the present invention are as follows: Embodiment 1 of the heat insulation pad encapsulation device of the present invention: This embodiment provides an automated device that specifically implements step (a) of claim 1 and operation (A) of claim 6. Along the material conveying direction, the device sequentially integrates a feeding module, a pre-compression and shaping module, a hot-pressing encapsulation module, and a die-cutting and receiving module. After the stack is automatically assembled by the feeding module, it sequentially flows through the pre-compression and shaping module to complete S3, the hot-pressing encapsulation module to complete S4, and finally the die-cutting and receiving module to complete S5 and output the finished product.

[0045] The core component of this module is a pair of pre-pressed rollers 204. Depending on the production plan, these rollers can be configured with the entire roller surface covered by a specific elastic material layer, or with circumferentially arranged localized rigid pressure plates mounted on the roller surface. The module possesses the necessary tension control and correction mechanisms.

[0046] In addition to the aforementioned pre-pressing rollers, the equipment in this embodiment also includes a hot-pressing encapsulation module and a die-cutting and receiving module. The hot-pressing encapsulation module is primarily a hot press, its core feature being that a series of rollers with heights calculated according to the formula H=(T) are installed on the working surfaces of its upper and lower heatable press heads 205. frame -T core The rigid boss 2051 is designed with a ) / 2 shape. The position of the rigid boss 2051 matches the product layout, and the edges are chamfered. The die-cutting and receiving module can integrate one or more of the following: circular die-cutting unit, straight die-cutting unit, or laser die-cutting unit, and connect to an automatic receiving device.

[0047] This equipment is a customized integration based on the "two-step collaborative" process of this invention. The specific structure of the pre-compression shaping module and the thermo-compression packaging module, as well as their spatial sequential connection, force the optimal process path of shaping first and then strengthening from a hardware perspective, ensuring the reliability and repeatability of the method innovation.

[0048] Embodiment 2 of the heat insulation pad encapsulation device of the present invention: This embodiment provides an automated device that specifically implements step (b) of claim 1 and operation (B) of claim 6.

[0049] This equipment has a more compact structure, mainly comprising a feeding module, an integrated pressing module, and a die-cutting and receiving module. After the laminate is fed, it only needs to pass through the integrated pressing module once to complete all pressing and encapsulation operations, followed by die-cutting and receiving. Its core module is the integrated pressing module. The core of the integrated pressing module is a pair of integrated pressing rollers 301. Locally raised structures 3011 are fixed along the circumferential direction on the roller pressing surface, and the rollers integrate a high-efficiency heating system (such as oil heating or electric heating) to precisely control the roller surface temperature.

[0050] The device in this embodiment integrates three major functions—partial protrusion structure, rotary pressing, and online heating—into a single unit, forming a multi-functional integrated core workstation that demonstrates outstanding performance in achieving high-efficiency production.

[0051] Furthermore, for the method and equipment of this invention, after the pre-pressing and shaping step and before the hot-pressing strengthening step in the two-step process, an automated station can be added to the production line for attaching a peel-off handle to the adhesive release paper of the preformed part. This greatly improves the convenience for end users when using the heat insulation pad. Using a porous fabric plate for auxiliary positioning in the stacking assembly stage is particularly suitable for improving the positioning accuracy of individual silicone frames or during initial debugging. This fabric plate can be made of heat-resistant and wear-resistant materials and can be removed from the production line after pre-pressing by a specialized robot or conveyor mechanism, cleaned, and reused, thus improving quality while controlling auxiliary material costs.

[0052] To demonstrate the beneficial effects of the present invention, the following provides a comparison of experimental results and conclusions: To objectively and quantitatively verify the unexpected technical effects brought about by the present invention, a comparative test was conducted between the traditional one-step flat plate hot pressing process (comparative example) and the two technical paths provided by the present invention (Example 1 and Example 2). All tests used the same basic materials (silicone frame, heat insulation core material, and encapsulation film). Comparison items Comparative example Example 1 Example 2 Analysis of comparative effects Peeling force between heat insulation core material and rubber frame 55.2 N / 25 mm 58.9 N / 25 mm 57.3 N / 25 mm Performance not reduced Production efficiency 9000 pcs / 10 h 15000 pcs / 10 h 15000 pcs / 10 h Efficiency greatly improved Overall production yield: qualified if the surface is flat without wrinkles or creases, there are clear steps at the junction of the return frame and the core material, no bulges, and no air leakage 96.4% 98.7% 99.2% Yield significantly improved

[0053] Final conclusion: Based on the above specific implementation methods and experimental data, it can be seen that by using the equipment and method of the present invention, production efficiency and overall yield can be greatly improved while ensuring the quality of the heat insulation pad, thus achieving the expected results.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for encapsulating a heat insulation pad, characterized in that, Includes either of the following steps (a) or (b): (a) First, the stack consisting of the lower encapsulation film, the silicone frame and the heat insulation core material is mechanically pressed to make the encapsulation film adhere to the surface formed by the silicone frame and the heat insulation core material and shape it; then, the shaped stack is heated and pressurized to complete the final encapsulation. (b) Passing the stack through a pressing device, wherein the pressing device is configured to simultaneously shape and heat-pressurize the stack in a single pressing operation.

2. The heat insulation pad encapsulation method according to claim 1, characterized in that, In step (a), the mechanical pressing is achieved by a pair of pre-pressing rollers; the roller pressing surfaces of the pre-pressing rollers are covered with an elastic material layer, or the roller pressing surfaces of the pre-pressing rollers are provided with localized hard pressing platforms corresponding to the position of the heat insulation core material; in step (b), the pressing device is a pair of pressing rollers, and the roller pressing surfaces are provided with localized protrusions corresponding to the position of the heat insulation core material; the elastic modulus of the elastic material layer is in the range of 0.6 MPa to 1.2 MPa; the single-sided distance between the edge of the localized hard pressing platform and the projected edge of the heat insulation core material is 0.5 mm to 3 mm.

3. The heat insulation pad encapsulation method according to claim 2, characterized in that, The single-sided distance between the edge of the local protrusion structure and the projected edge of the thermal insulation core material is 0.5mm to 3mm.

4. The method for encapsulating a heat insulation pad according to any one of claims 1 to 3, characterized in that, The silicone frame is a strip-shaped frame continuously arranged along the production line conveying direction; the method also includes the step of cutting the continuously packaged product into independent units.

5. The method for encapsulating a heat insulation pad according to any one of claims 1 to 3, characterized in that, The thermal insulation core material includes any one or more of the following: fiber material layer, fiber-reinforced aerogel composite material layer, phase change material layer, strain material layer, and elastic layer.

6. A heat insulation pad encapsulation device, characterized in that, The device is configured to perform either (A) or (B) of the following operations: (A) First, mechanically press the laminate consisting of the lower encapsulation film, the silicone frame and the heat insulation core material so that the encapsulation film adheres to the surface formed by the silicone frame and the heat insulation core material and is shaped. The shaped stack is then heated and pressurized to complete the final encapsulation; wherein the equipment performing operation (A) includes: a shaping device for mechanically pressing the stack; and an encapsulation device disposed downstream of the shaping device for heating and pressurizing the shaped stack. (B) The laminate is passed through a pressing device, wherein the pressing device is configured to simultaneously shape and heat-pressurize the laminate in a single pressing operation; wherein the pressing device in the equipment performing operation (B) is a pair of pressing rollers, the roller surfaces of which are provided with local protrusions corresponding to the position of the thermal insulation core material; the thermal insulation core material includes any one or more of the following: a fiber material layer, a fiber-reinforced aerogel composite material layer, a phase change material layer, a strain material layer, and an elastic layer.

7. The heat insulation pad encapsulation device according to claim 6, characterized in that, When performing operation (A), the shaping device is a pair of pre-pressing rollers; the roller pressing surfaces of the pre-pressing rollers are covered with an elastic material layer; or the roller pressing surfaces of the pre-pressing rollers are provided with localized hard pressing platforms corresponding to the position of the heat insulation core material.

8. The heat insulation pad encapsulation device according to claim 7, characterized in that, The elastic modulus of the elastic material layer ranges from 0.6 MPa to 1.2 MPa; the single-sided distance between the edge of the localized rigid pressing platform and the projected edge of the thermal insulation core material is from 0.5 mm to 3 mm.

9. The heat insulation pad encapsulation device according to claim 6, characterized in that, When performing operation (B), the single-sided distance between the edge of the local protrusion structure and the projected edge of the thermal insulation core material is 0.5 mm to 3 mm.

10. The heat insulation pad encapsulation device according to any one of claims 6 to 9, characterized in that, The equipment is configured to process silicone frames having strip-shaped frames continuously arranged along the production line conveying direction, and includes a die-cutting device for slitting continuously packaged products into individual units.

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