A die-cutting process and die-cutting line

Abstract

The application discloses a die-cutting process and a die-cutting production line. The die-cutting process comprises the following steps: composite a film material on a first supporting film; die-cutting the film material to form a first group of products and an intermediate film material; wherein the first group of products comprises a plurality of products uniformly and evenly distributed along the length direction of the film material, the intermediate film material is formed with a cutting area corresponding to the position of each product in the first group of products, and the distance between any two adjacent cutting areas in the length direction of the film material is equal to the size of the product in the length direction of the film material; separating the intermediate film material from the first supporting film to separate each product in the first group of products from the intermediate film material and make the product fall on the first supporting film; die-cutting the part of the intermediate film material between the adjacent two cutting areas to form a second group of products and film waste, wherein the second group of products comprises a plurality of products uniformly and evenly distributed along the length direction of the film material; and separating the second group of products from the film waste. The application can improve the utilization rate of the film material.

Description

Technical Field

[0001] This invention relates to the field of die-cutting technology, and in particular to a die-cutting process and die-cutting production line. Background Technology

[0002] When cutting adhesive membrane materials, a certain gap is set between two adjacent products. When the gap between the products is too small, the products will stick together, affecting their separation. In related technologies, in order to facilitate the separation of products from the membrane material, the gap between two adjacent products is set to be larger, which results in more waste material generated after die-cutting, reducing the utilization rate of the membrane material. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the first aspect of the present invention proposes a die-cutting process that can improve the utilization rate of film materials.

[0004] A second aspect of the present invention also provides a die-cutting production line.

[0005] A die-cutting process according to a first aspect of the present invention includes the following steps:

[0006] The membrane material is laminated onto the first support film;

[0007] The membrane material is die-cut to form a first group of products and an intermediate membrane material; wherein, the first group of products includes multiple products that are evenly spaced along the length of the membrane material, and the intermediate membrane material has cut-off areas corresponding to the positions of each product in the first group of products, and the distance between any two adjacent cut-off areas in the length of the membrane material is equal to the size of the product in the length of the membrane material.

[0008] Separate the intermediate membrane and the first support membrane so that each product in the first group of products is separated from the intermediate membrane and falls onto the first support membrane;

[0009] The portion of the intermediate membrane material located between two adjacent cut-off zones is die-cut to form a second set of products and membrane material waste. The second set of products includes multiple products that are evenly spaced along the length of the membrane material.

[0010] The second group of products was separated from the membrane waste.

[0011] According to a die-cutting process based on a first aspect of the present invention, at least the following technical effects are achieved:

[0012] In the die-cutting process of this application, the film material is laminated onto a first backing film, and then the film material on the first backing film is die-cut, thereby forming a first set of products and an intermediate film material. The first set of products includes multiple products evenly spaced along the length of the film material. The intermediate film material has cut-out areas corresponding to the positions of each product in the first set of products. The distance between any two adjacent cut-out areas in the length of the film material is equal to the size of the product in the length of the film material. At this time, the intermediate film material and the first set of products are laminated onto the first backing film. By separating the intermediate film material from the first backing film, each product in the first set of products attached to the first backing film is separated from the intermediate film material. The portion of the intermediate film material located between every two adjacent cut-out areas is then die-cut, thereby forming a second set of products and film waste. The second set of products includes multiple products evenly spaced along the length of the film material. Then, each product in the second set of products is separated from the film waste. As can be seen from the above die-cutting process, the embodiments of the present invention form the first group of products and the second group of products by two die-cutting processes. In each die-cutting process, the adjacent products in each group of products have a gap with the same size as the product in the length direction of the film material, thus effectively avoiding the phenomenon of product adhesion. Moreover, since each product in the second group of products is formed by die-cutting the portion between every two adjacent cut-out areas on the intermediate film material, and since the distance between any two adjacent cut-out areas in the length direction of the film material is equal to the size of the product in the length direction of the film material, the film material can be used efficiently and with almost no waste in the length direction of the film material, thereby improving the utilization rate of the film material.

[0013] According to a first aspect of the present invention, a die-cutting process for separating an intermediate film material and a first support film includes the following steps:

[0014] The support film is laminated onto the side of the intermediate film material that is away from the first support film;

[0015] Separate the first base film, to which the first group of products are attached, from the intermediate film material.

[0016] According to a first aspect of the present invention, a die-cutting process is performed on a portion of an intermediate membrane material located between two adjacent cut-off zones to form a second set of products and membrane material waste, comprising the following steps:

[0017] The side of the intermediate membrane material facing away from the support membrane is laminated onto the second base membrane;

[0018] Separate the support membrane and the intermediate membrane material;

[0019] The intermediate membrane material is die-cut so that the portion of the intermediate membrane material located between two adjacent cut-out areas is die-cut to form the individual products in the second group of products, and the remaining portion of the intermediate membrane material is formed as membrane waste.

[0020] According to a die-cutting process based on a first aspect of the present invention, separating a second set of products from film waste includes the following steps:

[0021] The membrane waste is separated from the second base film so that the second set of products is separated from the membrane waste and falls onto the second base film.

[0022] According to a die-cutting process of a first aspect of the present invention, the product includes a first sheet and a second sheet bonded to the first sheet, wherein the outline of the second sheet projected onto the first sheet is located inside the outline of the first sheet; the film material includes a first film layer and a second film layer, and the film material is bonded to a first backing film through the first film layer;

[0023] Die-cutting the membrane material to form the first set of products and intermediate membrane materials includes the following steps:

[0024] Simultaneously, the first and second film layers are die-cut to form multiple composite sheets and intermediate film materials. The multiple composite sheets are evenly spaced along the length of the film material, and each composite sheet includes a first sheet formed by cutting the first film layer and a semi-finished sheet formed by cutting the second film layer. The outline of the semi-finished sheet projected onto the first sheet coincides with the outline of the first sheet. The intermediate film material forms cut-off areas corresponding to the positions of each composite sheet.

[0025] The semi-finished sheet is die-cut to form a second sheet.

[0026] According to a first aspect of the present invention, a die-cutting process is performed on a portion of an intermediate membrane material located between two adjacent cut-off zones to form a second set of products and membrane material waste, comprising the following steps:

[0027] The portion of the second membrane layer in the intermediate membrane material located between two adjacent cut-out areas is die-cut to form a second sheet;

[0028] The portion of the first membrane layer in the intermediate membrane material located between two adjacent cut areas is die-cut to form the first sheet.

[0029] According to a die-cutting process of a first aspect of the present invention, each product is provided with a group of process holes, and the process includes the following steps before laminating the film material onto a first backing film:

[0030] The membrane material is die-cut to form multiple positioning holes;

[0031] The membrane material is die-cut to form multiple sets of process holes.

[0032] According to a first aspect of the present invention, a die-cutting process for forming a plurality of positioning holes by die-cutting a film material includes the following steps:

[0033] The membrane material is positioned by using 2n+2m positioning holes formed by the previous die-cutting, and 2n positioning holes are formed on the membrane material by die-cutting, where n≥1 and m≥1.

[0034] According to a first aspect of the present invention, a die-cutting process includes a group of process holes comprising alternating first process holes and second process holes. Die-cutting a film material to form a plurality of process hole groups includes the following steps:

[0035] The process involves two die-cutting operations to form the first process hole and the second process hole on the film material, respectively.

[0036] According to a second aspect of the present invention, a die-cutting production line is used to implement the die-cutting process described in the first aspect of the present invention.

[0037] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0039] Figure 1 This is a flowchart of the die-cutting process according to one embodiment of this application;

[0040] Figure 2 This is a top view of a product formed according to one embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the structure of a product formed according to one embodiment of this application;

[0042] Figure 4 This is a schematic diagram of the structure of the membrane material composite before the first support membrane in one embodiment of this application;

[0043] Figure 5 for Figure 4 A schematic diagram of the structure after the membrane material is die-cut to form the first set of products and the intermediate membrane material;

[0044] Figure 6 for Figure 5 A schematic diagram of the structure of the intermediate membrane material in the middle;

[0045] Figure 7 for Figure 6 A schematic diagram of the structure of the second sheet of the second group of products formed by die-cutting the second film layer of the intermediate film material;

[0046] Figure 8 for Figure 7A schematic diagram of the structure of the first sheet of the second group of products formed by die-cutting the first layer of the intermediate membrane material;

[0047] Figure 9 for Figure 5 A schematic diagram of the structure of the membrane waste formed by die-cutting the intermediate membrane material.

[0048] Figure label:

[0049] Membrane material 100, positioning hole 110;

[0050] The first group of products: 200;

[0051] Intermediate membrane material 300, cut area 310;

[0052] Product 400, first sheet 410, second sheet 420, process hole group 430, first process hole 431, second process hole 432;

[0053] The second group of products: 500;

[0054] 600 tons of membrane material waste. Detailed Implementation

[0055] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0056] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, left, right, front, back, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0057] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0058] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0059] The following is for reference. Figures 1 to 9 A die-cutting process according to a first aspect of the present invention will be described in detail.

[0060] refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 8 According to a first aspect of the present invention, a die-cutting process includes, but is not limited to, steps S100, S200, S300, S400, and S500:

[0061] Step S100: Lay the membrane material 100 onto the first support film;

[0062] Step S200: Die-cut the membrane material 100 to form a first group of products 200 and an intermediate membrane material 300; wherein, the first group of products 200 includes a plurality of products 400 evenly spaced along the length of the membrane material 100, and the intermediate membrane material 300 has cut-out areas 310 at the positions of each product 400 in the first group of products 200, and the distance between any two adjacent cut-out areas 310 in the length of the membrane material 100 is equal to the size of the product 400 in the length of the membrane material 100;

[0063] Step S300: Separate the intermediate membrane 300 and the first support film so that each product 400 in the first group of products 200 is separated from the intermediate membrane 300 and falls onto the first support film;

[0064] Step S400: Die-cut the portion of the intermediate membrane material 300 located between two adjacent cut-out areas 310 to form a second set of products 500 and membrane material waste 600. The second set of products 500 includes a plurality of products 400 that are evenly spaced along the length of the membrane material 100.

[0065] Step S500: Separate the second group of products 500 from the membrane waste 600.

[0066] In the die-cutting process of this application, the film material 100 is laminated onto a first backing film, and then the film material 100 on the first backing film is die-cut, thereby forming a first set of products 200 and an intermediate film material 300. The first set of products 200 includes multiple products 400 evenly spaced along the length of the film material 100. The intermediate film material 300 has cut-out areas 310 corresponding to the positions of each product 400 in the first set of products 200. The distance between any two adjacent cut-out areas 310 along the length of the film material 100 is equal to the dimension of the product 400 along the length of the film material 100. At this time, the first backing film... The intermediate membrane material 300 and the first group of products 200 are combined. By separating the intermediate membrane material 300 from the first support film, each product 400 of the first group of products 200 attached to the first support film is separated from the intermediate membrane material 300. The portion of the intermediate membrane material 300 located between every two adjacent cut-out areas 310 is then die-cut, thereby die-cutting the intermediate membrane material 300 into a second group of products 500 and membrane waste 600. The second group of products 500 includes a plurality of products 400 evenly spaced along the length direction of the membrane material 100. Then, each product 400 in the second group of products 500 is separated from the membrane waste 600. As can be seen from the above die-cutting process, each product 400 in the second group of products 500 is formed by die-cutting the portion between every two adjacent cut-out areas 310 on the intermediate membrane material 300. Since the distance between any two adjacent cut-out areas 310 in the length direction of the membrane material 100 is equal to the size of the product 400 in the length direction of the membrane material 100, the arrangement of each product 400 on the membrane material 100 is closely connected, which improves the utilization rate of the membrane material 100.

[0067] Understandably, by dividing product 400 into a first group of products 200 and a second group of products 500, each product 400 in the first group of products 200 is first die-cut on the membrane material 100. Then, each product 400 in the first group of products 200 attached to the first backing membrane is separated from the intermediate membrane material 300. At this time, since the distance between any two adjacent products 400 in the first group of products 200 in the length direction of the membrane material 100 is equal to the size of the product 400 in the length direction of the membrane material 100, the gap between the two products 400 is relatively large, thus allowing each product 400 in the first group of products 200 to be smoothly separated from the intermediate membrane material 300. Then, the portion between every two adjacent cut-out areas 310 on the intermediate membrane material 300 is die-cut to form each product 400 in the second group of products 500 and membrane waste 600. At this time, there is no connection between the products 400 in the second group of products 500, and each product 400 in the second group of products 500 can also be smoothly separated from the membrane waste 600.

[0068] refer to Figure 5 and Figure 6 In some embodiments of the present invention, step S300 includes, but is not limited to, the following steps:

[0069] Step S310: Composite the support film onto the side of the intermediate film 300 that is away from the first support film;

[0070] Step S320: Separate the first support film with the first group of products 200 attached from the intermediate film material 300.

[0071] Understandably, after die-cutting the membrane material 100 to form the first set of products 200 and the intermediate membrane material 300, both the first set of products 200 and the intermediate membrane material 300 are attached to the first support film. A support film is then laminated onto the side of the intermediate membrane material 300 facing away from the first support film. The intermediate membrane material 300 attached to the support film is then separated from the first support film to which the first set of products 200 are attached, allowing each product 400 in the first set of products 200 to be smoothly separated onto the first support film. The support film provides support and protection for the intermediate membrane material 300, reducing deformation during separation and thus lowering the possibility of product 400 misalignment during die-cutting of the intermediate membrane material 300.

[0072] refer to Figure 6 and Figure 8 In some embodiments of the present invention, step S400 includes, but is not limited to, the following steps:

[0073] Step S410: Lay the side of the intermediate membrane material 300 away from the support membrane onto the second support membrane;

[0074] Step S420: Separate the support membrane and the intermediate membrane material 300;

[0075] Step S430: Die-cut the intermediate membrane material 300 so that the portion of the intermediate membrane material 300 located between two adjacent cutting areas 310 is die-cut to form each product 400 in the second group of products 500, and the remaining portion of the intermediate membrane material 300 forms membrane waste 600.

[0076] Understandably, after the intermediate membrane 300 separates from the first support membrane, the intermediate membrane 300 is attached to the second support membrane. The second support membrane is then laminated onto the side of the intermediate membrane 300 away from the support membrane. The support membrane is then separated from the intermediate membrane 300. The intermediate membrane 300 on the second support membrane is then die-cut. The portion of the intermediate membrane 300 located between every two adjacent cut-out areas 310 is die-cut to form each product 400 in the second group of products 500. The remaining portion of the intermediate membrane 300 is die-cut to form membrane waste 600.

[0077] refer to Figure 8 and Figure 9 In one embodiment of the present invention, step S500 includes, but is not limited to, the following steps:

[0078] Step S510: Separate the membrane waste 600 from the second support membrane so that the second set of products 500 are separated from the membrane waste 600 and fall onto the second support membrane.

[0079] It is understandable that after the intermediate film material 300 on the second base film is die-cut, the second base film is attached with film waste 600 and the second group of products 500. By separating the second base film from the film waste 600, the film waste 600 is separated from each product 400 in the second group of products 500 attached to the second base film.

[0080] refer to Figure 2 , Figure 3 and Figure 4 In some embodiments of the present invention, product 400 includes a first sheet 410 and a second sheet 420 adhered to the first sheet 410, wherein the outline of the second sheet 420 projected onto the first sheet 410 is located inside the outline of the first sheet 410; film 100 includes a first film layer and a second film layer, and film 100 is laminated onto a first support film through the first film layer; step S200 includes, but is not limited to, the following steps:

[0081] Step S210: Simultaneously, the first film layer and the second film layer are die-cut to cut the film material 100 into multiple composite sheets and an intermediate film material 300. The multiple composite sheets are evenly spaced along the length of the film material 100, and each composite sheet includes a first sheet 410 formed by cutting the first film layer and a semi-finished sheet formed by the second film layer. The outline of the semi-finished sheet projected onto the first sheet 410 coincides with the outline of the first sheet 410. The intermediate film material 300 forms a cut-off area 310 at the position corresponding to each composite sheet.

[0082] Step S220: Die-cut the semi-finished sheet to form a second sheet 420.

[0083] It is understood that when the membrane material 100 is die-cut to form the first group of products 200 and the intermediate membrane material 300, the first and second membrane layers of the membrane material 100 are simultaneously die-cut to form multiple composite sheets and the intermediate membrane material 300. The multiple composite sheets are evenly spaced along the length of the membrane material 100. The composite sheets include a first sheet 410 formed by cutting the first membrane layer and a semi-finished sheet formed by cutting the second membrane layer. The semi-finished sheet is then die-cut to form a second sheet 420, so that each of the composite sheets corresponds to each product 400 in the first group of products 200.

[0084] It is understood that steps S210 and S220 can also be performed simultaneously, with the first film layer and the second film layer being die-cut at the same time, so that the first film layer of the film material 100 is cut into a plurality of first sheets 410 evenly spaced along the length direction of the film material 100, and the second film layer of the film material 100 is cut into a plurality of second sheets 420 evenly spaced along the length direction of the film material 100. The first sheets 410 and the second sheets 420 are set in a one-to-one correspondence, so that each first sheet 410 and the second sheet 420 attached to the corresponding first sheet 410 together form each product 400 in the first group of products 200.

[0085] refer to Figure 3 , Figure 7 , Figure 8 and Figure 9 In some embodiments, step S400 includes, but is not limited to, the following steps:

[0086] Step S440: Die-cut the portion of the second film layer in the intermediate film material 300 located between two adjacent cut-out areas 310 to form the second sheet 420;

[0087] Step S450: Die-cut the portion of the first film layer in the intermediate film material 300 located between two adjacent cut-out areas 310 to form the first sheet 410.

[0088] It is understandable that when die-cutting the portion of the intermediate membrane material 300 located between two adjacent cut-out areas 310, the portion between each two adjacent cut-out areas 310 on the second membrane layer of the intermediate membrane material 300 is first die-cut to form a second sheet 420, and then the portion between each two adjacent cut-out areas 310 on the first membrane layer of the intermediate membrane material 300 is die-cut to form a first sheet 410. After the above two die-cuttings are completed, the remaining portions of the first and second membrane layers of the intermediate membrane material 300 together constitute membrane waste 600, and after the die-cutting is completed, the two originally adjacent cut-out areas 310 will be interconnected.

[0089] refer to Figures 2 to 4 In some embodiments of the present invention, each product 400 is provided with a process hole group 430, and the following steps are included before step S100:

[0090] The membrane material 100 is die-cut to form multiple positioning holes 110;

[0091] The membrane material 100 is die-cut to form multiple process hole groups 430.

[0092] It is understandable that positioning holes 110 are formed by die-cutting on the membrane material 100 to facilitate positioning of the membrane material 100 in subsequent processes.

[0093] Specifically, the membrane material 100 has multiple positioning holes 110 arranged along the length direction of the membrane material 100 in the width direction near the two edges of the membrane material 100. The positioning holes 110 in the width direction near the two edges of the membrane material 100 are symmetrically distributed about the length direction of the membrane material 100.

[0094] refer to Figure 4 In one embodiment of the present invention, "die-cutting the membrane material 100 to form a plurality of positioning holes 110" includes the following steps:

[0095] The membrane material 100 is positioned by the 2n+2m positioning holes 110 formed by the previous die-cutting, and 2n positioning holes 110 are formed on the membrane material 100 by die-cutting, where n≥1 and m≥1.

[0096] It is understandable that in the process of die-cutting the membrane material 100 to form multiple positioning holes 110, each time a die-cut is performed, n positioning holes 110 need to be die-cut on each edge in the width direction of the membrane material 100. In each die-cut, the membrane material 100 is positioned by the 2n+2m positioning holes 110 formed in the previous few die-cuts (for example, when m=n, that is, by the positioning holes 110 formed in the previous two die-cuts), thereby improving the positional accuracy of the positioning holes 110 obtained by die-cutting on the membrane material 100.

[0097] Specifically, when the membrane material 100 is die-cut to form multiple positioning holes 110, each time a die-cut is performed, two positioning holes 110 are formed at each edge in the width direction of the membrane material 100, and the three positioning holes 110 formed at each edge in the width direction of the membrane material 100 are positioned.

[0098] refer to Figures 2 to 4 In one embodiment of the present invention, the process hole group 430 includes alternating first process holes 431 and second process holes 432. "Die-cutting the film material 100 to form a plurality of process hole groups 430" includes the following steps:

[0099] The process involves two die-cutting operations to form the first process hole 431 and the second process hole 432 on the film material 100, respectively.

[0100] Understandably, by dividing the process hole group 430 into multiple first process holes 431 and multiple second process holes 432, and with the first process holes 431 and the second process holes 432 being distributed alternately, the operational difficulty during die cutting is reduced.

[0101] Specifically, the process hole group 430 includes three first process holes 431 and three second process holes 432.

[0102] The following provides a detailed description of a die-cutting production line according to a second aspect of the present invention.

[0103] According to a second aspect embodiment of the present invention, a die-cutting production line is used to implement the die-cutting process of the first aspect embodiment described above. The die-cutting production line includes a first laminating machine, a first die-cutting machine, a second laminating machine, a second die-cutting machine, a third laminating machine, a third die-cutting machine, and a fourth laminating machine arranged sequentially along the production line; wherein, the first laminating machine is used to laminate a first film layer and a second film layer to form a film material 100; the first die-cutting machine is used to die-cut a plurality of positioning holes 110 and a plurality of process hole groups 430 on the film material 100; the second laminating machine is used to laminate a first backing film onto the film material 100, and to discharge waste generated by the first die-cutting machine when die-cutting the positioning holes 110 and process hole groups 430 on the film material 100; the second die-cutting machine is used to die-cut the film material 100 attached to the first backing film to form a first set of products. The third laminating machine includes a first bonding mechanism, a peeling mechanism, and a second bonding mechanism arranged sequentially along the production line. The first bonding mechanism is used to bond a support film onto the side of the intermediate film 300 away from the first backing film. The peeling mechanism is used to separate the first backing film from the intermediate film 300 so that the first set of products 200 on the first backing film is separated from the intermediate film 300. The second bonding mechanism is used to laminate the intermediate film 300 after it has been separated from the first backing film onto the second backing film. The third die-cutting machine is used to die-cut the film 100 to form the second set of products 500 and film waste 600. The fourth laminating machine is used to separate the second set of products 500 from the film waste 600.

[0104] It is understandable that the punch of the first die-cutting machine is equipped with at least two sets of cutters. The two sets of cutters are used to die-cut the first process hole 431 and the second process hole 432 of the process hole group 430, respectively. The distance between the two sets of cutters in the length direction of the film material 100 is equal to several times the size of the product 400 in the length direction of the film material 100, and the size of the product 400 in the length direction of the film material 100 is the moving step distance of the film material 100.

[0105] Understandably, the die-cutting production line also includes a fifth laminating machine. When the second die-cutting machine die-cuts the film material 100 to form the first set of products 200, it will generate sheet waste. The fifth laminating machine is used to discharge the residual film waste 600 on the first set of products 200.

[0106] Specifically, all die-cutting machines in the die-cutting production line are flat die-cutting machines.

[0107] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A die cutting process characterized by, The method comprises the following steps: compositing a film material (100) on a first supporting film; die cutting the film material (100) to form a first group of products (200) and an intermediate film material (300); wherein the first group of products (200) comprises a plurality of products (400) uniformly and evenly distributed along the length direction of the film material (100), the intermediate film material (300) is formed with a cut-out area (310) corresponding to the position of each product (400) in the first group of products (200), and the distance between any two adjacent cut-out areas (310) along the length direction of the film material (100) is equal to the size of the product (400) along the length direction of the film material (100); the product (400) comprises a first sheet (410) and a second sheet (420) attached to the first sheet (410), the contour of the second sheet (420) on the first sheet (410) is located within the contour of the first sheet (410); the film material (100) comprises a first film layer and a second film layer, and the film material (100) is composed of the first supporting film through the first film layer; the die cutting of the film material (100) to form the first group of products (200) and the intermediate film material (300) comprises the following steps: simultaneously die cutting the first film layer and the second film layer to cut the film material (100) into a plurality of composite sheets and the intermediate film material (300), the plurality of composite sheets are uniformly and evenly distributed along the length direction of the film material (100), and each composite sheet comprises the first sheet (410) cut from the first film layer and a semi-finished sheet formed from the second film layer; wherein the contour of the semi-finished sheet on the first sheet (410) coincides with the contour of the first sheet (410); the intermediate film material (300) is formed with the cut-out area (310) corresponding to the position of each composite sheet; the semi-finished sheet is die cut to form the second sheet (420); separating the intermediate film material (300) from the first supporting film to separate each product (400) in the first group of products (200) from the intermediate film material (300) and make the product (400) fall on the first supporting film; die cutting the part of the intermediate film material (300) between two adjacent cut-out areas (310) to form a second group of products (500) and film material waste (600), the second group of products (500) comprises a plurality of products (400) uniformly and evenly distributed along the length direction of the film material (100); separating the second group of products (500) from the film material waste (600).

2. A die cutting process according to claim 1, wherein, The separation of the intermediate film material (300) from the first supporting film comprises the following steps: compositing a supporting film on the side of the intermediate film material (300) away from the first supporting film; Separating the first backing film with the first group of products (200) attached therefrom from the intermediate film material (300).

3. A die cutting process according to claim 2, wherein, The step of die cutting the intermediate film material (300) to form the second group of products (500) and the film material waste (600) includes the following steps: Compounding the intermediate film material (300) on a second backing film from a side of the intermediate film material (300) facing away from the support film; Separating the support film from the intermediate film material (300); Die cutting the intermediate film material (300) such that the portions of the intermediate film material (300) between adjacent two of the cut-out regions (310) are die cut to form the individual products (400) in the second group of products (500) and the remaining portion of the intermediate film material (300) forms the film material waste (600).

4. A die cutting process according to claim 3, wherein, The step of separating the second group of products (500) from the film material waste (600) includes the following steps: Separating the film material waste (600) from the second backing film such that the second group of products (500) is separated from the film material waste (600) and falls on the second backing film.

5. A die cutting process according to claim 1 wherein, The step of die cutting the intermediate film material (300) to form the second group of products (500) and the film material waste (600) includes the following steps: Die cutting the portions of the second film layer of the intermediate film material (300) between adjacent two of the cut-out regions (310) to form the second pieces (420); Die cutting the portions of the first film layer of the intermediate film material (300) between adjacent two of the cut-out regions (310) to form the first pieces (410).

6. A die cutting process according to claim 1 wherein, Each product (400) is provided with a group of process holes (430), and the step of compounding the film material (100) on a first backing film includes the following steps: Die cutting the film material (100) to form a plurality of positioning holes (110); Die cutting the film material (100) to form a plurality of the group of process holes (430).

7. A die cutting process according to claim 6, wherein, The step of die cutting the film material (100) to form a plurality of positioning holes (110) includes the following steps: Positioning the film material (100) by the 2n+2m positioning holes (110) formed by previous die cutting, and die cutting 2n positioning holes (110) on the film material (100), where n≥1 and m≥1.

8. A die cutting process according to claim 6, wherein, The group of process holes (430) includes alternately distributed first process holes (431) and second process holes (432), and the step of die cutting the film material (100) to form a plurality of the group of process holes (430) includes the following steps: Die cutting twice to form the first process holes (431) and the second process holes (432) on the film material (100), respectively.

9. A die cutting production line characterized in that, A die cutting process for implementing any one of claims 1 to 8.

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