A multi-layer product die-cutting process and die-cutting equipment

Abstract

The present invention discloses a multi-layer product die-cutting process and die-cutting equipment, relating to the field of die-cutting processing technology. The multi-layer product die-cutting process includes: S1, die-cutting a protective film; S2, die-cutting a combined layer of PET single-sided adhesive and aluminum foil single-sided adhesive; S3, die-cutting a first graphite film, PET double-sided adhesive, and a second graphite film; S4, die-cutting a combined layer of aluminum foil double-sided adhesive and textured adhesive; S5, product forming and die-cutting; and S6, waste discharge and winding. The die-cutting equipment is used to perform the multi-layer product die-cutting process. The multi-layer product die-cutting process and die-cutting equipment described in the present invention are capable of mass-producing multi-layer products, ensuring product quality and improving production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of die-cutting processing, in particular to a die-cutting process and die-cutting equipment for multi-layer products. Background Art

[0002] Die-cutting is a process whereby raw materials are cut to a predetermined shape using a die-cutting plate under pressure. Die-cut products are widely used in industries such as automotive manufacturing and consumer electronics.

[0003] Conventional die-cutting of multi-layered products often cannot be performed directly due to their complex structure. Furthermore, products made of soft materials like aluminum foil are easily damaged during waste removal, failing to meet production quality requirements. Consequently, conventional production processes typically rely on manual assembly and waste removal, which is time-consuming and inefficient. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problems of the prior art in which a manual assembly and waste discharge production process is used for die-cutting multi-layer products, which is time-consuming and has low production efficiency.

[0005] In a first aspect, to solve the above technical problems, the present invention provides a multi-layer product die-cutting process, comprising the following steps:

[0006] S1, die-cut protective film;

[0007] Laminating the main base film and the protective film, and die-cutting the protective film at the edge of the outer contour of the preset product to form a first semi-finished product;

[0008] S2, a combination layer of die-cut PET single-sided adhesive and aluminum foil single-sided adhesive;

[0009] laminating the PET single-sided adhesive layer and the aluminum foil single-sided adhesive layer to form a combined layer according to the distribution positions of the PET single-sided adhesive layer and the aluminum foil single-sided adhesive layer on the product, and laminating the combined layer of the PET single-sided adhesive layer and the aluminum foil single-sided adhesive layer to one side of the protective film; die-cutting the combined layer of the PET single-sided adhesive layer and the aluminum foil single-sided adhesive layer at the boundary between the PET single-sided adhesive layer and the aluminum foil single-sided adhesive layer, thereby forming a second semi-finished product;

[0010] S3, die-cutting the first graphite film, PET double-sided tape and the second graphite film;

[0011] Sequentially stacking and laminating the first graphite film, the PET double-sided tape, and the second graphite film, die-cutting the stacked and laminating first graphite film, the PET double-sided tape, and the second graphite film to form a third semi-finished product that is shaped like the product, and laminating the third semi-finished product to the side of the second semi-finished product away from the main base film;

[0012] S4, a combination layer of die-cut aluminum foil double-sided tape and textured adhesive;

[0013] Laminating the aluminum foil double-sided adhesive layer and the textured adhesive layer to form a combined layer based on the distribution positions of the aluminum foil double-sided adhesive layer and the textured adhesive layer on the product, die-cutting the combined layer of the aluminum foil double-sided adhesive layer and the textured adhesive layer at the boundary between the aluminum foil double-sided adhesive layer and the textured adhesive layer, forming a fourth semi-finished product, and laminating the fourth semi-finished product to a side of the third semi-finished product away from the second semi-finished product;

[0014] S5, product forming and die-cutting;

[0015] Die-cutting the laminated structure of the second semi-finished product, the third semi-finished product, and the fourth semi-finished product on the main base film, and simultaneously die-cutting the protective film, wherein the die-cutting position is the remaining edge line of the preset product outer contour, thereby forming the product;

[0016] S6, waste discharge and rewinding;

[0017] The formed product is separated from the main backing film and the protective film, and the main backing film and the protective film are rolled up.

[0018] In one embodiment of the present invention, in S2, it further includes collecting the self-covering film on the adhesive side of the combined layer of the PET single-sided adhesive and the aluminum foil single-sided adhesive.

[0019] In one embodiment of the present invention, in S3, before die-cutting, the first graphite film, PET double-sided tape and the second graphite film are stacked in sequence on the first base film; after die-cutting, the waste of the first graphite film, PET double-sided tape and the second graphite film are discharged and rolled up, and the third semi-finished product is on the first base film.

[0020] In one embodiment of the present invention, in S3, after die-cutting, the first backing film and the third semi-finished product move in opposite directions, the third semi-finished product is attached to the side of the second semi-finished product away from the main backing film, and the first backing film is rolled up.

[0021] In one embodiment of the present invention, in S4, before die-cutting, the combined layer of the aluminum foil double-sided adhesive and the textured adhesive is laminated and attached to the second backing film.

[0022] In one embodiment of the present invention, in S4, after die-cutting, the second backing film and the fourth semi-finished product move in opposite directions, the fourth semi-finished product is attached to the side of the third semi-finished product away from the second semi-finished product, and the second backing film is rolled up.

[0023] In one embodiment of the present invention, in S5, before die-cutting, a first release film is laminated and attached to a side of the fourth semi-finished product away from the third semi-finished product.

[0024] In one embodiment of the present invention, in S6, a second release film is laminated and laminated on the other side of the molded product away from the main base film, the molded product is peeled off from the protective film and the main base film, and laminated on the second release film, and the second release film of the molded product is rolled up and laminated.

[0025] In the second aspect, in order to solve the above-mentioned technical problems, the present invention also provides a die-cutting equipment for executing the multi-layer product die-cutting process, which includes at least five groups of die-cutting knife groups, and the five groups of die-cutting knife groups correspond to the die-cutting processes in S1-S5 respectively; each group of the die-cutting knife groups includes a die-cutting circular knife and a pressure roller, and a gap is left between the die-cutting circular knife and the pressure roller. The die-cutting raw material is located in the gap between the die-cutting circular knife and the pressure roller, and the die-cutting circular knife rotates to cut the die-cutting raw material.

[0026] In one embodiment of the present invention, the die-cutting circular knife corresponding to the die-cutting process of S5 is provided with a low blade and a high blade with different die-cutting depths. The low blade dies-cuts the stacked bonding structure of the second semi-finished product, the third semi-finished product and the fourth semi-finished product on the main base film, and the high blade dies-cuts the preset shape of the protective film.

[0027] The above technical solution of the present invention has the following advantages over the prior art:

[0028] The multi-layer product die-cutting process described in the present invention includes: S1, die-cutting a protective film; S2, die-cutting a combined layer of PET single-sided adhesive and aluminum foil single-sided adhesive; S3, die-cutting a first graphite film, PET double-sided adhesive and a second graphite film; S4, die-cutting a combined layer of aluminum foil double-sided adhesive and textured adhesive; S5, product molding and die-cutting; S6, waste discharge and winding. By pre-cutting the protective film so that part of the protective film is half-broken and the middle layer of the product is sequentially stacked on the main base film and the protective film, when the product is formed in S5, the main outer contour dimensions of the product are formed as a whole at one time, which improves the product precision, and the waste materials of the outer contour of the middle layer of the product and the waste materials of the half-broken area of ​​the protective film are connected as one, which is convenient for subsequent overall waste discharge, reduces the risk of deformation and wrinkling of the aluminum foil material and damage to the product due to single-layer waste discharge, and ensures product quality. The multi-layer product die-cutting process is easy to operate, suitable for mechanized production of rotary die-cutting equipment, and effectively improves the production efficiency of multi-layer products.

[0029] The die-cutting equipment of the present invention can mass-produce multi-layer products by executing the multi-layer product die-cutting process, thereby improving production efficiency while ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0031] Figure 1 It is a schematic diagram of the structure of the multi-layer product of the present invention;

[0032] Figure 2 yes Figure 1 A schematic diagram illustrating each level in a multi-level product;

[0033] Figure 3 is a flow chart of a multi-layer product die-cutting process according to a preferred embodiment of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the die-cutting equipment in a preferred embodiment of the present invention.

[0035] Explanation of the reference numerals in the specification: 11. Main base film; 12. Protective film; 21. PET single-sided tape; 22. Aluminum foil single-sided tape; 23. Self-covering film; 31. First graphite film; 32. PET double-sided tape; 33. Second graphite film; 34. First base film; 41. Aluminum foil double-sided tape; 42. Textured tape; 43. Second base film; 51. First release film; 61. Second release film; 7. Multi-layer product; 71. Protective film layer; 72. PET single-sided tape layer; 73. Aluminum foil single-sided tape layer; 74. First graphite film layer; 75. PET double-sided tape layer; 76. Second graphite film layer; 77. Aluminum foil double-sided tape layer; 78. Textured tape layer; T1-T5, five sets of die-cutting knife groups. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0037] Example 1

[0038] Reference Figure 1 and Figure 2 As shown, the multi-layered product 7 of the present invention includes a protective film layer 71, a PET single-sided adhesive layer 72, an aluminum foil single-sided adhesive layer 73, a first graphite film layer 74, a PET double-sided adhesive layer 75, a second graphite film layer 76, an aluminum foil double-sided adhesive layer 77 and a textured adhesive layer 78 in the thickness direction, wherein the PET single-sided adhesive layer 72 and the aluminum foil single-sided adhesive layer 73 together constitute the same layer structure, which is attached to one side of the first graphite film layer 74, the first graphite film layer 74, the PET double-sided adhesive layer 75, and the second graphite film layer 76 are stacked and attached in sequence, and the aluminum foil double-sided adhesive layer 77 and the textured adhesive layer 78 together constitute the same layer structure, which is attached to one side of the second graphite film layer 76.

[0039] Due to the complex product structure, two materials are placed on the same layer, and one of the materials is soft aluminum foil. This can easily damage the product during waste removal, making direct machine die-cutting difficult and making it difficult to meet production quality requirements. Therefore, the existing technology often uses manual assembly and waste removal production processes with low production efficiency.

[0040] Based on the above reasons, the die-cutting process for the multi-layered product 7 of the present invention provides a mechanical processing die-cutting process that can improve production efficiency while ensuring the die-cutting quality of the multi-layered product 7.

[0041] Reference Figure 3 As shown, the present invention discloses a multi-layer product die-cutting process, comprising the following steps:

[0042] S1, die-cut protective film;

[0043] The main base film 11 and the protective film 12 are laminated and bonded, and the protective film 12 is die-cut. The die-cutting position is the edge of the outer contour of the preset product to form a first semi-finished product;

[0044] S2, a combination layer of die-cut PET single-sided adhesive and aluminum foil single-sided adhesive;

[0045] According to the distribution positions of the PET single-sided adhesive layer 72 and the aluminum foil single-sided adhesive layer 73 on the product, the PET single-sided adhesive layer 21 and the aluminum foil single-sided adhesive layer 22 are laminated to form a combined layer, and the combined layer of the PET single-sided adhesive layer 21 and the aluminum foil single-sided adhesive layer 22 is laminated to one side of the protective film 12; the combined layer of the PET single-sided adhesive layer 21 and the aluminum foil single-sided adhesive layer 22 is die-cut at the boundary between the PET single-sided adhesive layer 21 and the aluminum foil single-sided adhesive layer 22, thereby forming a second semi-finished product;

[0046] S3, die-cutting the first graphite film, PET double-sided tape and the second graphite film;

[0047] The first graphite film 31, the PET double-sided tape 32, and the second graphite film 33 are laminated in sequence, and the laminated first graphite film 31, the PET double-sided tape 32, and the second graphite film 33 are die-cut to form a third semi-finished product that is shaped like the product, and the third semi-finished product is laminated to the side of the second semi-finished product away from the main base film 11;

[0048] S4, a combination layer of die-cut aluminum foil double-sided tape and textured adhesive;

[0049] Based on the distribution of the aluminum foil double-sided adhesive layer 77 and the textured adhesive layer 78 on the product, the aluminum foil double-sided adhesive layer 41 and the textured adhesive layer 42 are laminated to form a single combined layer. The combined layer of the aluminum foil double-sided adhesive layer 41 and the textured adhesive layer 42 is die-cut at the boundary between the aluminum foil double-sided adhesive layer 41 and the textured adhesive layer 42 to form a fourth semi-finished product. The fourth semi-finished product is laminated to the side of the third semi-finished product away from the second semi-finished product.

[0050] S5, product forming and die-cutting;

[0051] Die-cutting the laminated structure of the second semi-finished product, the third semi-finished product, and the fourth semi-finished product on the main base film 11; and simultaneously die-cutting the protective film 12 at the remaining edge of the preset product outer contour to form the product;

[0052] S6, waste discharge and rewinding;

[0053] The formed product is separated from the main backing film 11 and the protective film 12 , and the main backing film 11 and the protective film 12 are rolled up.

[0054] The multi-layer product die-cutting process utilizes pre-cutting to partially cut the protective film 12 and sequentially laminate the product's intermediate layers onto the main support film 11 and protective film 12. During product formation in S5, the product's primary outer contour dimensions are formed in one piece, improving product precision. The waste from the intermediate layer's outer contour and the waste from the partially cut area of ​​the protective film 12 are integrated, facilitating subsequent integrated waste removal. This reduces the risk of aluminum foil deformation, wrinkling, and product damage caused by single-layer waste removal, thus ensuring product quality. The multi-layer product die-cutting process is easy to operate and suitable for mechanized production using rotary die-cutting equipment, effectively improving the production efficiency of multi-layer products 7.

[0055] In this embodiment, the primary backing film 11 serves as a support for the die-cut material in step S1 until it is separated from the formed product and rewound in step S6. After the protective film 12 is laminated and bonded to the primary backing film 11 in step S1, the remaining material from the product protective film layer 71 is removed. The remaining material is then discharged in step S6 and rewound simultaneously with the primary backing film 11. Specifically, in step S1, the die-cutting position on the protective film 12 corresponds to the short edge contour of the product protective film layer 71. After die-cutting, the protective film 12 is partially cut and does not directly discharge.

[0056] In this embodiment, preferably, in S2, it is further included to collect the self-covering film 23 on the adhesive side of the combined layer of the PET single-sided adhesive 21 and the aluminum foil single-sided adhesive 22. By collecting the self-covering film 23 on the adhesive side of the combined layer of the PET single-sided adhesive 21 and the aluminum foil single-sided adhesive 22 before die-cutting, it is convenient to attach the PET single-sided adhesive 21, the aluminum foil single-sided adhesive 22 to the protective film 12.

[0057] In this embodiment, specifically, in step S2, after lamination, the boundary between the PET single-sided adhesive tape 21 and the aluminum foil single-sided adhesive tape 22 is die-cut, thereby facilitating subsequent discharge and preventing the PET single-sided adhesive tape 21 from pulling and deforming the aluminum foil single-sided adhesive tape 22 during discharge. Furthermore, die-cutting the boundary after lamination ensures the dimensional accuracy of the junction between the PET single-sided adhesive layer 72 and the aluminum foil single-sided adhesive layer 73 on the product.

[0058] In this embodiment, preferably, in S3, before die-cutting, the first graphite film 31, the PET double-sided tape 32 and the second graphite film 33 are stacked in sequence on the first base film 34; after die-cutting, the waste of the first graphite film 31, the PET double-sided tape 32 and the second graphite film 33 are discharged and rolled up, and the third semi-finished product is on the first base film 34.

[0059] By providing the first support film 34, the first graphite film 31, the PET double-sided tape 32, and the second graphite film 33 are formed during die-cutting to form a third semi-finished product that mimics the final product. After die-cutting, the product is directly discarded, with the first support film 34 simply supporting the third semi-finished product until it is bonded to the second semi-finished product, at which point the first support film 34 is reeled in. Discarding the first graphite film 31, the PET double-sided tape 32, and the second graphite film 33 directly after die-cutting reduces the difficulty of final product discarding in S6 and ensures production accuracy.

[0060] In this embodiment, preferably, after die-cutting, the first backing film 34 and the third semi-finished product move in opposite directions, the third semi-finished product is attached to the side of the second semi-finished product away from the main backing film 11, and the first backing film 34 is rolled up. The first backing film 34 and the third semi-finished product move in opposite directions and attach to each other, which facilitates operation and layout and saves space.

[0061] In this embodiment, specifically, in S4, after lamination, the boundary between the aluminum foil double-sided adhesive tape 41 and the textured adhesive tape 42 is die-cut to facilitate subsequent discharge and prevent the textured adhesive tape 42 from pulling and deforming the aluminum foil double-sided adhesive tape 41 during discharge. Furthermore, die-cutting the boundary after lamination ensures the dimensional accuracy of the junction between the aluminum foil double-sided adhesive layer 77 and the textured adhesive layer 78 on the product.

[0062] In this embodiment, preferably, in S4 , before die-cutting, the combined layers of the aluminum foil double-sided tape 41 and the textured tape 42 are laminated and attached to the second base film 43 .

[0063] By providing the second bottom film 43 , the second bottom film 43 serves as a bottom support structure, which facilitates die-cutting of the combined layer of the aluminum foil double-sided adhesive 41 and the textured adhesive 42 and ensures that the fourth semi-finished product can be smoothly attached to the third semi-finished product.

[0064] In this embodiment, preferably, in S4, after die-cutting, the second backing film 43 and the fourth semi-finished product move in opposite directions, the fourth semi-finished product is attached to the side of the third semi-finished product away from the second semi-finished product, and the second backing film 43 is rolled up. The second backing film 43 and the fourth semi-finished product move in opposite directions and attach to each other, which facilitates operation and layout, and saves space.

[0065] In this embodiment, preferably, in S5, before die-cutting, a first release film 51 is laminated on the side of the fourth semi-finished product away from the third semi-finished product. By laminating the first release film 51, the outermost side of the product is protected and separated.

[0066] In this embodiment, specifically, in S5, the second semi-finished product, the third semi-finished product and the fourth semi-finished product stacked in sequence are die-cut at one time according to the outer contour of the product, and the die-cutting position is the outer contour line of the product, thereby forming the main outer contour of the product; at the same time, the protective film 12 is die-cut to supplement the remaining edge line of the protective film 12 corresponding to the product protective film layer 71 on the semi-die-cut protective film 12 in S1. Specifically, in S5, the die-cutting position on the protective film 12 is the long side contour line of the preset product protective film layer 71. After die-cutting, the multi-layered product 7 is formed and the whole is separated from the protective film 12.

[0067] In this embodiment, preferably, in S5, the die-cutting of the second semi-finished product, the third semi-finished product and the fourth semi-finished product stacked in sequence and the die-cutting of the protective film 12 are set to a high-low die-cutting process, that is, the same die-cutting circular knife with different high and low blades is used for die-cutting, so that the main dimensions of the outer contour of the multi-layered product 7 can be formed at one time by the same die-cutting circular knife, which greatly ensures the precision requirements of the multi-layered product 7.

[0068] In this embodiment, preferably, in S6, the second release film 61 is laminated and laminated on the other side of the molded product away from the main base film 11, the molded product is peeled off from the protective film 12 and the main base film 11, and laminated on the second release film 61, and the second release film 61 of the molded product is rolled up and laminated.

[0069] By providing the second release film 61, the molded product is laminated to the second release film 61, thereby facilitating the separation of the molded product from the primary backing film 11. After the molded product is laminated to the second release film 61, the remaining waste materials of the protective film 12, the PET single-sided tape 21, the aluminum foil single-sided tape 22, the aluminum foil double-sided tape 41, and the textured adhesive 42 are removed and pulled away. The waste materials are then reeled up simultaneously with the primary backing film 11, and the molded product is reeled up simultaneously with the second release film 61, thus completing the die-cutting production of the multi-layered product 7.

[0070] Example 2

[0071] Reference Figure 4 As shown, the present invention also discloses a die-cutting device for performing the multi-layer product die-cutting process, which includes at least five groups of die-cutting knife groups T1-T5, and the five groups of die-cutting knife groups T1-T5 correspond to the die-cutting processes in S1-S5 respectively; each group of die-cutting knife groups includes a die-cutting circular knife and a pressing roller, and a gap is left between the die-cutting circular knife and the pressing roller. The die-cutting raw material is located in the gap between the die-cutting circular knife and the pressing roller, and the die-cutting circular knife rotates to cut the die-cutting raw material.

[0072] The die-cutting equipment can mass-produce multi-layer products 7 by executing the multi-layer product die-cutting process, thereby improving production efficiency while ensuring product quality.

[0073] In this embodiment, preferably, the die-cutting circular knife corresponding to the die-cutting process of S5 is provided with a low blade and a high blade with different die-cutting depths, the low blade dies-cuts the stacked bonding structure of the second semi-finished product, the third semi-finished product and the fourth semi-finished product on the main base film 11, and the high blade dies-cuts the preset shape of the protective film 12.

[0074] By setting the same die-cutting circular knife with different die-cutting depths, the main dimensions of the outer contour of the multi-layered product 7 can be formed at one time by the same die-cutting circular knife, which greatly ensures the precision requirements of the multi-layered product 7.

[0075] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A multi-layer product die-cutting process, characterized in that: The following steps are involved: S1, die-cut protective film; Laminating the main base film and the protective film, and die-cutting the protective film at the edge of the outer contour of the preset product to form a first semi-finished product; S2, a combination layer of die-cut PET single-sided adhesive and aluminum foil single-sided adhesive; laminating the PET single-sided adhesive layer and the aluminum foil single-sided adhesive layer to form a combined layer according to the distribution positions of the PET single-sided adhesive layer and the aluminum foil single-sided adhesive layer on the product, and laminating the combined layer of the PET single-sided adhesive layer and the aluminum foil single-sided adhesive layer to one side of the protective film; die-cutting the combined layer of the PET single-sided adhesive layer and the aluminum foil single-sided adhesive layer at a dividing line between the PET single-sided adhesive layer and the aluminum foil single-sided adhesive layer, thereby forming a second semi-finished product; S3, die-cutting the first graphite film, PET double-sided tape and the second graphite film; The first graphite film, PET double-sided tape and the second graphite film are stacked and laminated in sequence, and the stacked and laminated first graphite film, PET double-sided tape and second graphite film are die-cut to form a third semi-finished product that is similar to the product, and the third semi-finished product is laminated on the side of the second semi-finished product away from the main base film; wherein, before die-cutting, the first graphite film, PET double-sided tape and the second graphite film are stacked in sequence on the first base film; after die-cutting, the waste of the first graphite film, PET double-sided tape and the second graphite film is discharged and rolled up, and the third semi-finished product is on the first base film; after die-cutting, the first base film and the third semi-finished product move in opposite directions, the third semi-finished product is laminated on the side of the second semi-finished product away from the main base film, and the first base film is rolled up S4, a combination layer of die-cut aluminum foil double-sided tape and textured adhesive; According to the distribution positions of the aluminum foil double-sided adhesive layer and the textured adhesive layer on the product, the aluminum foil double-sided adhesive layer and the textured adhesive layer are laminated to form a combined layer, the combined layer of the aluminum foil double-sided adhesive layer and the textured adhesive layer is die-cut at the boundary between the aluminum foil double-sided adhesive layer and the textured adhesive layer, a fourth semi-finished product is formed, and the fourth semi-finished product is laminated to the side of the third semi-finished product away from the second semi-finished product; before die-cutting, the combined layer of the aluminum foil double-sided adhesive layer and the textured adhesive layer is laminated to the second backing film; after die-cutting, the second backing film and the fourth semi-finished product are moved in opposite directions, the fourth semi-finished product is laminated to the side of the third semi-finished product away from the second semi-finished product, and the second backing film is rolled up; S5, product forming and die-cutting; Die-cutting the laminated structure of the second semi-finished product, the third semi-finished product, and the fourth semi-finished product on the main base film, and simultaneously die-cutting the protective film, wherein the die-cutting position is the remaining edge line of the preset product outer contour, thereby forming the product; S6, waste discharge and rewinding; The shaped product is peeled off from the protective film and the main backing film, and the main backing film and the protective film are rolled up.

2. The die-cutting process for multi-layered products according to claim 1, characterized in that: In S2, the process further includes collecting the self-covering film on the adhesive side of the combined layer of the PET single-sided adhesive and the aluminum foil single-sided adhesive.

3. The die-cutting process for multi-layered products according to claim 1, characterized in that: In S5 , before die-cutting, a first release film is laminated and attached to a side of the fourth semi-finished product away from the third semi-finished product.

4. The die-cutting process for multi-layered products according to claim 1, characterized in that: In S6, a second release film is laminated and attached to the other side of the molded product away from the main backing film. The molded product is peeled off from the protective film and the main backing film and attached to the second release film. The second release film of the molded product is rolled up and attached.

5. A die-cutting device for performing the die-cutting process for multi-layer products according to any one of claims 1 to 4, characterized in that: It includes at least five groups of die-cutting knife groups, and the five groups of die-cutting knife groups correspond to the die-cutting processes in S1-S5 respectively; each group of the die-cutting knife groups includes a die-cutting circular knife and a pressing roller, and a gap is left between the die-cutting circular knife and the pressing roller. The die-cutting raw material is located in the gap between the die-cutting circular knife and the pressing roller, and the die-cutting circular knife rotates to cut the die-cutting raw material.

6. The die-cutting device according to claim 5, characterized in that: The die-cutting circular knife corresponding to the die-cutting process of S5 is provided with a low blade and a high blade with different die-cutting depths. The low blade dies-cuts the stacked bonding structure of the second semi-finished product, the third semi-finished product and the fourth semi-finished product on the main base film, and the high blade dies-cuts the preset shape of the protective film.

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