A method for manufacturing copper foil die-cut parts

Abstract

The present invention relates to a method for manufacturing a copper foil die-cut part, the copper foil die-cut part comprises a single-sided adhesive layer, a copper foil layer, a double-sided adhesive layer and a release paper layer arranged in sequence from top to bottom, the profile of the single-sided adhesive layer comprises an overlap section and a staggered section, the overlap section overlaps with the profile of the copper foil layer, the staggered section is located on the surface of the copper foil layer and staggered with the profile of the copper foil layer; the manufacturing method first processes a groove structure on a double-sided adhesive material, and after the copper foil is attached to the groove structure, an obvious mark is generated at the position of the groove structure, and the mark is used to ensure the accuracy of the attachment of the single-sided adhesive layer. Compared with the prior art, the present invention has the advantages of fewer processes, high processing efficiency, fewer molds, and high economic benefits.

Description

Technical Field

[0001] The invention relates to the technical field of die-cutting, and in particular to a method for manufacturing a copper foil die-cut piece. Background Art

[0002] Current copper foil products, such as Figure 1 As shown, it includes a single-sided adhesive layer, a copper foil layer, a double-sided adhesive layer and a release paper layer arranged from top to bottom, wherein the single-sided adhesive layer covers a part of the copper foil layer for insulation, but cannot cover all the copper foil parts, and the exposed copper foil layer is used for welding. The other side of the copper foil layer is affixed with two conductive adhesives, one large and one small, and then the large conductive adhesive is affixed to the release paper layer, and the release paper layer has the same contour as the large conductive adhesive. During the processing of this product, in order to ensure that there is no indentation on the copper foil surface, it is usually hoped that the single-sided adhesive layer is accurately affixed to the copper foil surface according to the predetermined position. In order to ensure the accuracy of the affixing of the single-sided adhesive layer on the copper foil layer, it is necessary to process a marking line on the copper foil surface, and then use a laminating machine to affix one side edge of the single-sided adhesive material based on the position of the marking line. The laminating accuracy of this process is ±0.8MM. However, this processing method requires 3 steps to make, which takes up machine time and has low processing efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a method for manufacturing copper foil die-cut parts in order to overcome the defects of the above-mentioned prior art, such as complex process and low efficiency.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A method for manufacturing a copper foil die-cut part, the copper foil die-cut part comprising a single-sided adhesive layer, a copper foil layer, a double-sided adhesive layer and a release paper layer arranged in sequence from top to bottom, the profile of the single-sided adhesive layer comprising an overlapping section and a staggered section, the overlapping section overlaps with the profile of the copper foil layer, and the staggered section is located on the surface of the copper foil layer and staggered with the profile of the copper foil layer;

[0006] The preparation method comprises the following steps:

[0007] (a) laminating a release paper material, a double-sided adhesive material and an auxiliary release film on a bottom adhesive tape in sequence, and using a first punching die to continuously punch a groove structure on one side of the double-sided adhesive material and the auxiliary release film, wherein the groove structure is located in a non-product area on the material tape, and the bottom of the groove structure is located at the staggered section of the single-sided adhesive layer; discharging waste double-sided adhesive material, and completely tearing off the auxiliary release film;

[0008] (b) A copper foil is laminated on the double-sided adhesive material using a laminating machine, and marks appear on the surface of the copper foil at the groove structure;

[0009] (c) using the mark on the surface of the copper foil as a positioning mark, attaching a single-sided adhesive material to the surface of the copper foil; using a second punching die to punch out the outer contour of the product on the single-sided adhesive material, copper foil, double-sided adhesive material and release paper material, and obtaining the copper foil die-cut part after discarding.

[0010] Through actual production experience, it is found that when there are depressions on the double-sided adhesive material, that is, there are adhesive-free areas and adhesive areas, after the copper foil is attached, the height difference between the adhesive-free area and the adhesive area will cause obvious marks on the copper foil. Therefore, the present invention designs an auxiliary groove structure between the gaps in the product area. After the copper foil is bonded, coupled with the bonding action of the bonding machine, an imprint of the groove structure will be produced on the copper foil. The bottom of the groove structure is used for positioning, so that the edge of the double-sided adhesive material is aligned with the bottom position of each groove structure, thereby ensuring the precise bonding position of the single-sided adhesive material; at the same time, the entire production process does not need to separately process positioning marks on the copper foil surface, eliminating a die-cutting step and a processing step, greatly improving production efficiency and saving costs.

[0011] In step (a), the patterns obtained by two adjacent punching cuts on the surface of the material strip by the first punching die are connected end to end, and the groove structures obtained by punching are connected as a whole through the side edges of the double-sided adhesive material.

[0012] If the grooves are made separately, each groove structure is separated, which is not conducive to the waste discharge of the double-sided adhesive material in the groove structure.

[0013] The first punching die is provided with a positioning knife line having the same structure as the groove and a first row of waste auxiliary knife lines connected to the positioning knife line, and the first row of waste auxiliary knife lines is located in a non-product area on the material strip.

[0014] The first row of waste auxiliary knife lines is a straight line structure parallel to the side of the double-sided adhesive material.

[0015] A second row of waste auxiliary knife lines is also provided on the first punching die, and the first row of waste auxiliary knife lines and the second row of waste auxiliary knife lines are located on both sides of the product area.

[0016] For copper foil products with special structures, the double-sided adhesive layer of the copper foil product includes a main adhesive area with a larger area, a secondary adhesive area with a smaller area, and a non-adhesive area separated from the main adhesive area and the secondary adhesive area; the main adhesive area is located below the single-sided adhesive layer, and the first punching die is also provided with a non-adhesive area knife line that matches the upper and lower edge contours of the non-adhesive area.

[0017] In step (a), the glue-free area contours obtained by two adjacent punchings on the material strip by the first punching die are connected end to end, and finally the glue-free areas on the material strip are connected into a long strip structure, which is convenient for the discharge of waste materials in the glue-free areas.

[0018] The release paper layer completely overlaps with the main adhesive area up and down, and the outer contours of the copper foil layer and the double-sided adhesive layer overlap up and down; the knife line of the non-adhesive area on the first punching die corresponds to the release paper material and punches out the contour of the release paper layer close to the non-adhesive area.

[0019] The second punching die is provided with a first outer contour knife line matching the remaining contour of the release paper layer and a second outer contour knife line matching the outer contour of the secondary glue area away from the main glue area; the punching layers of the first outer contour knife line are single-sided adhesive material, copper foil, double-sided adhesive material and release paper material, and the punching layers of the second outer contour knife line are single-sided adhesive material, copper foil and double-sided adhesive material.

[0020] The double-sided adhesive material is a conductive double-sided adhesive material.

[0021] The single-sided adhesive material is PET single-sided adhesive.

[0022] In the present invention, the thickness of the copper foil is about 0.05 mm, for example, 0.03 to 0.07 mm.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] (1) The processing method of the present application creatively utilizes the characteristic that the copper foil surface will produce obvious marks in the non-adhesive area of ​​the double-sided adhesive tape, and processes a groove structure in the double-sided adhesive tape, and uses the marks produced by the groove structure for positioning, thereby reducing the processing steps, reducing the die-cutting machine, saving the punching process, saving the mold cost, saving the time the product occupies the machine, reducing the processing time, and helping to improve the processing efficiency and economic cost;

[0025] (2) When making the positioning groove, a first auxiliary waste discharge knife line is set. This knife line allows each groove structure to be connected together through the side edges cut on the double-sided adhesive layer by the first auxiliary waste discharge knife line to form a whole, which is convenient for waste discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the copper foil die-cutting part in the present invention;

[0027] Figure 2 It is a schematic diagram of the manufacturing method of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the die-cutting tool and die-cutting layers used in the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the material strip after one punching in the present invention;

[0030] Figure 5 It is a schematic diagram of the preparation method in the comparative example;

[0031] Figure 6 It is a structural schematic diagram of the die-cutting tool and die-cutting layer used in the comparative example;

[0032] In the figure, 1 is a copper foil die-cut part, 101 is a single-sided adhesive layer, 102 is a copper foil layer, 103 is a double-sided adhesive layer, 104 is a release paper layer, 2 is a first punching die, 201 is a positioning knife line, 202 is a first row of waste auxiliary knife lines, 203 is a knife line for a non-glue area, 204 is a second row of waste auxiliary knife lines, 3 is a second punching die, 301 is a first outer contour knife line, 302 is a second outer contour knife line, 4 is a release paper material, 5 is a double-sided adhesive material, 6 is an auxiliary release film, 7 is a bottom tape, 8 is copper foil, 9 is a single-sided adhesive material, 10 is an auxiliary release film and double-sided adhesive waste, 11 is a release film waste, 12 is a feeding direction, 13 is a glue area, 14 is a non-glue area, 15 is a marking knife line, and 16 is a third punching die. DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0034] Example

[0035] A method for manufacturing a copper foil die-cut part, the structure of the copper foil die-cut part is as follows Figure 1 As shown, it includes a single-sided adhesive layer 101, a copper foil layer 102, a double-sided adhesive layer 103 and a release paper layer 104 arranged in sequence from top to bottom, wherein the single-sided adhesive layer 101 is made of PET single-sided adhesive and plays an insulating role, and the double-sided adhesive layer 103 is a conductive double-sided adhesive. From the perspective of the outer contour, the contour of the single-sided adhesive layer 101 includes an overlapping section and an offset section, the overlapping section overlaps with the contour of the copper foil layer 102, the offset section is located on the surface of the copper foil layer 102 and is offset from the contour of the copper foil layer 102, the double-sided adhesive layer attached to the copper foil layer 102 includes a main adhesive area with a larger area, a secondary adhesive area with a smaller area, and a non-adhesive area separated from the main adhesive area and the secondary adhesive area, and the bottom release paper layer 104 overlaps with the contour of the main adhesive area; the copper foil layer of the copper foil product has a piece covered by the single-sided adhesive layer 101 and the release paper layer 104 from top to bottom, exposing part of the copper foil layer 102 for welding, and the release paper layer 104 is used as a release paper for the handle;

[0036] The method for making copper foil die-cut parts includes the following steps. The specific die-cutting method is as follows: Figure 2 As shown, the feeding direction 12 of the material strip during the punching process is shown by the arrow in the figure:

[0037] (a) The release paper material 4, the double-sided adhesive material 5 and the auxiliary release film 6 are sequentially attached to the bottom adhesive tape 7, using the following method: Figure 3 The first punching die 2 shown in the middle left figure punches the material strip, and the first punching die 2 is provided with a positioning knife line 201 of a groove structure, a first row of waste auxiliary knife lines 202 connected to the positioning knife line 201, a second row of waste auxiliary knife lines 204 arranged at a position relative to the first row of waste auxiliary knife lines 202, and a non-glue area knife line corresponding to the upper and lower contours of the non-glue area, wherein the non-glue area knife line is divided into an upper non-glue area knife line and a lower non-glue area knife line, which are parallel to each other, and the area between the first row of waste auxiliary knife lines 202 and the second row of waste auxiliary knife lines 204 is the product area, and the positioning knife line 201 is connected to the end of the first row of waste auxiliary knife lines 202; the first punching die 2 continuously punches on one side of the double-sided adhesive material 5 and the auxiliary release film 6 to obtain a groove structure, which is located in the non-product area on the material strip, and the bottom of the groove structure is located at the staggered section of the single-sided adhesive layer 101; the waste of the double-sided adhesive material 5 is discharged, And the auxiliary release film 6 is completely torn off; the patterns obtained by two adjacent punchings on the surface of the material strip by the first punching die 2 are connected end to end, and the groove structure obtained by punching is connected as a whole through the side of the double-sided adhesive material 5, which is convenient for subsequent waste discharge; among the upper non-glue area knife lines of the first punching die 2, the non-glue area knife lines close to the first row of waste auxiliary knife lines 202 punch out the upper contour of the non-glue area on the auxiliary release film 6 and the double-sided adhesive material 5, and the non-glue area knife lines close to the second row of waste auxiliary knife lines 204 punch out the lower contour of the non-glue area on the auxiliary release film 6, the double-sided adhesive material 5 and the release paper material 4; the punching layers of the first row of waste auxiliary knife lines 202, the second row of waste auxiliary knife lines 204 and the positioning knife lines 201 are the auxiliary release film 6 and the double-sided adhesive material 5; when discharging waste, first tear off the auxiliary release film and the double-sided adhesive waste 10 on both sides, at this time the groove structure has been formed; then tear off the release film waste 11 in the middle;

[0038] (b) Use a laminating machine to laminate copper foil 8 onto the double-sided adhesive material 5, such as Figure 4 As shown, there are adhesive areas 13 and non-adhesive areas 14 under the copper foil 8, and the shaded area is the adhesive area 13. After being bonded by the bonding machine, marks appear on the surface of the copper foil 8 at the groove structure;

[0039] (c) Using the mark on the surface of the copper foil 8 as a positioning mark, a single-sided adhesive material 9 is attached to the surface of the copper foil 8; Figure 3The second punching die 3 shown punches out the outer contour of the product on the single-sided adhesive material 9, copper foil 8, double-sided adhesive material 5 and release paper material 4, and obtains the copper foil die-cut part after discarding the waste; wherein the second punching die 3 is provided with a first outer contour knife line 301 matching the remaining contour of the release paper layer 104 and a second outer contour knife line 302 matching the outer contour of the secondary adhesive area away from the main adhesive area; the punching layers of the first outer contour knife line 301 are the single-sided adhesive material 9, copper foil 8, double-sided adhesive material 5 and release paper material 4, and the punching layers of the second outer contour knife line 302 are the single-sided adhesive material 9, copper foil 8 and double-sided adhesive material 5, and the remaining waste materials outside the contour are discarded one by one to obtain the copper foil die-cut part.

[0040] The die-cutting system corresponding to the method of this embodiment is:

[0041] It includes a first laminating machine, a first punching die 2, a first waste discharge mechanism, a second laminating machine, a third laminating machine, a second punching die 3 and a second waste discharge mechanism which are arranged in sequence;

[0042] The first laminating machine laminates the release paper material 4, the double-sided adhesive material 5 and the auxiliary release film 6 onto the bottom adhesive tape 7 in sequence; the first punching die 2 continuously punches out a groove structure on one side of the double-sided adhesive material 5 and the auxiliary release film 6, and the groove structure is located in the non-product area on the material tape, and the bottom of the groove structure is located at the staggered section of the single-sided adhesive layer 101; the first waste discharge mechanism discharges the waste material after one punching, exposing the double-sided adhesive material 5; the second laminating machine laminates the copper foil 8 onto the double-sided adhesive material 5, and after laminating, a mark appears on the surface of the copper foil 8 at the groove structure; the third laminating machine uses the mark on the surface of the copper foil 8 as a positioning mark and laminates the single-sided adhesive material 9 onto the surface of the copper foil 8; the second punching die 3 punches out the outer contour of the product on the single-sided adhesive material 9, the copper foil 8, the double-sided adhesive material 5 and the release paper material 4; the second waste discharge mechanism discharges the waste material outside the outer contour.

[0043] The method of this embodiment and the corresponding die-cutting system utilize the discovery that the difference between the glue-free area and the glue-covered area causes obvious marks on the copper foil. When designing the tool, a mark is made between the product gaps, and the single-sided adhesive is attached based on the mark caused by the difference in glue-free area, thereby eliminating a die-cutting step, saving the punching step, saving mold costs, saving the time the product occupies the machine, and reducing processing time.

[0044] Comparative Example

[0045] The comparative example is the company's current die-cutting method and die-cutting knife structure. The die-cutting method is as follows: Figure 5 As shown, the first punching is to produce the glue-free area inside the product, the second copper foil is pasted and a marking line for pasting the single-sided adhesive is made on the copper foil, and the third punching is to produce the outer frame of the product. The specific steps are as follows:

[0046] (a) The release paper material 4, the double-sided adhesive material 5 and the auxiliary release film 6 are sequentially attached to the bottom adhesive tape 7, using the following method: Figure 6 The first punching die 2 shown in the middle left figure punches the material strip, and is provided with a first row of waste auxiliary knife lines 202, a second row of waste auxiliary knife lines 204 arranged at a position opposite to the first row of waste auxiliary knife lines 202, and a no-glue area knife line 203 corresponding to the upper and lower contours of the no-glue area, wherein the no-glue area knife lines are divided into an upper no-glue area knife line and a lower no-glue area knife line, which are parallel to each other, and the area between the first row of waste auxiliary knife lines 202 and the second row of waste auxiliary knife lines 204 is the product area, and the patterns obtained by two adjacent punchings on the surface of the material strip by the first punching die 2 are connected end to end; the first punching die 2, the glue-free area knife line close to the first row of waste auxiliary knife lines 202 punches out the upper contour of the glue-free area on the auxiliary release film 6 and the double-sided adhesive material 5, and the glue-free area knife line close to the second row of waste auxiliary knife lines 204 punches out the lower contour of the glue-free area on the auxiliary release film 6, the double-sided adhesive material 5 and the release paper material 4; the punching layers of the first row of waste auxiliary knife lines 202 and the second row of waste auxiliary knife lines 204 are the auxiliary release film 6 and the double-sided adhesive material 5; when discharging waste, first tear off the auxiliary release film and the double-sided adhesive waste 10 on both sides, and then tear off the release film waste 11 in the middle;

[0047] (b) using a laminating machine to laminate the copper foil 8 onto the double-sided adhesive material 5, and using a third punching die 16 to punch the non-product area of ​​the copper foil 8, the third punching die 16 is provided with a marking knife line 15, and two short horizontal lines are processed on the surface of the copper foil 8 as markings;

[0048] (c) Using the mark on the surface of the copper foil 8 as the positioning mark, affix the single-sided adhesive material 9 to the surface of the copper foil 8, so that the side edge of the single-sided adhesive material 9 is exactly between the two short horizontal lines, that is, the composite lamination accuracy; using Figure 5 The second punching die 3 shown punches out the outer contour of the product on the single-sided adhesive material 9, copper foil 8, double-sided adhesive material 5 and release paper material 4, and obtains the copper foil die-cut part after discarding the waste; wherein the second punching die 3 is provided with a first outer contour knife line 301 matching the remaining contour of the release paper layer 104 and a second outer contour knife line 302 matching the outer contour of the secondary adhesive area away from the main adhesive area; the punching layers of the first outer contour knife line 301 are the single-sided adhesive material 9, copper foil 8, double-sided adhesive material 5 and release paper material 4, and the punching layers of the second outer contour knife line 302 are the single-sided adhesive material 9, copper foil 8 and double-sided adhesive material 5, and the remaining waste materials outside the contour are discarded one by one to obtain the copper foil die-cut part.

[0049] In the comparative punching method, three-step die cutting is required, the processing efficiency is low, the cost of the processing mold is high, and the economic benefit is low.

[0050] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A method for manufacturing a copper foil die-cut part, the copper foil die-cut part comprising a single-sided adhesive layer (101), a copper foil layer (102), a double-sided adhesive layer (103) and a release paper layer (104) arranged in sequence from top to bottom, the contour of the single-sided adhesive layer (101) comprising an overlapping section and a staggered section, the overlapping section overlapping with the contour of the copper foil layer (102), the staggered section being located on the surface of the copper foil layer (102) and staggered with the contour of the copper foil layer (102); It is characterized in that The preparation method comprises the following steps: (a) a release paper material (4), a double-sided adhesive material (5) and an auxiliary release film (6) are sequentially attached to a bottom adhesive tape (7), and a first punching die (2) is used to continuously punch a groove structure on one side of the double-sided adhesive material (5) and the auxiliary release film (6), wherein the groove structure is located in a non-product area on the material tape, and the bottom of the groove structure is located at the staggered section of the single-sided adhesive layer (101); waste of the double-sided adhesive material (5) is discharged, and the auxiliary release film (6) is completely torn off; the patterns obtained by two adjacent punchings on the surface of the material tape by the first punching die (2) are connected end to end, and the punched groove structures are connected as a whole through the side of the double-sided adhesive material (5); (b) using a laminating machine to laminate the copper foil (8) onto the double-sided adhesive material (5), so that marks appear on the surface of the copper foil (8) at the groove structure; (c) using the imprint on the surface of the copper foil (8) as a positioning mark, laminating a single-sided adhesive material (9) on the surface of the copper foil (8); using a second punching die (3) to punch out the outer contour of the product on the single-sided adhesive material (9), the copper foil (8), the double-sided adhesive material (5) and the release paper material (4), and obtaining the copper foil die-cut part after discarding; The double-sided adhesive layer (103) comprises a main adhesive area with a larger area, a secondary adhesive area with a smaller area, and a non-adhesive area separated from the main adhesive area and the secondary adhesive area; the main adhesive area is located below the single-sided adhesive layer (101), and the first punching die (2) is also provided with a non-adhesive area knife line (203) matching the upper and lower edge contours of the non-adhesive area; The release paper layer (104) completely overlaps with the main adhesive area in the upper and lower parts, and the outer contours of the copper foil layer (102) and the double-sided adhesive layer (103) overlap in the upper and lower parts; the non-adhesive area knife line (203) on the first punching die (2) punches out the contour of the release paper layer (104) close to the non-adhesive area in the release paper material (4); The second punching die (3) is provided with a first outer contour knife line (301) matching the remaining contour of the release paper layer (104) and a second outer contour knife line (302) matching the outer contour of the secondary adhesive area away from the primary adhesive area; the punching layers of the first outer contour knife line (301) are single-sided adhesive material (9), copper foil (8), double-sided adhesive material (5) and release paper material (4), and the punching layers of the second outer contour knife line (302) are single-sided adhesive material (9), copper foil (8) and double-sided adhesive material (5).

2. The method for making a copper foil die-cut part according to claim 1, characterized in that: The first punching die (2) is provided with a positioning knife line (201) having the same structure as the groove and a first row of waste auxiliary knife lines (202) connected to the positioning knife line (201), wherein the first row of waste auxiliary knife lines (202) is located in a non-product area on the material strip.

3. The method for making a copper foil die-cut part according to claim 2, characterized in that: The first row of waste auxiliary knife lines (202) is a straight line structure parallel to the side of the double-sided adhesive material (5).

4. The method for making a copper foil die-cut part according to claim 2, characterized in that: A second row of waste auxiliary knife lines (204) is also provided on the first punching die (2), and the first row of waste auxiliary knife lines (202) and the second row of waste auxiliary knife lines (204) are located on both sides of the product area.

5. The method for making a copper foil die-cut part according to claim 1, characterized in that: The double-sided adhesive material (5) is a conductive double-sided adhesive material.

6. The method for making a copper foil die-cut part according to claim 1, characterized in that: The single-sided adhesive material (9) is PET single-sided adhesive.

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