A die-cutting tool assembly for processing double-sided adhesive products with holes

Abstract

The present invention relates to a die-cutting tool assembly for processing a double-sided adhesive product with holes. The double-sided adhesive product includes a carrier film layer, which is divided into an adhesive area with a double-sided adhesive layer and an adhesive-free area protruding outward and connected to the adhesive area, and the adhesive-free area is provided with a through hole; the die-cutting tool assembly includes a first die-cutting tool, a second die-cutting tool and a third die-cutting tool for punching a material strip in sequence; the first die-cutting tool and the third die-cutting tool are common molds, and multiple rows of knife lines are arranged along the feeding direction of the material strip, and punching is performed at multiple steps; and the second die-cutting tool is a blanking punching mold, which is only provided with one row of knife lines, and punching is performed at a single step. Compared with the prior art, the present invention has the advantages of low mold cost and high production efficiency.

Description

Technical Field

[0001] The invention relates to a die-cutting tool, in particular to a die-cutting tool component for processing a double-sided adhesive product with holes. Background Art

[0002] Die-cut products are divided into one-step punching and multi-step punching. One-step punching products are relatively simple, while multi-step punching products (two or more steps are called multi-step punching) are more complicated than one-step punching. When punching with multi-step knife lines, it is necessary to punch positioning holes on both edges of the first step material strip, and the second and subsequent steps of punching are used to fit the positioning holes punched out in the first step to ensure the accuracy of the product.

[0003] For Figure 1 As shown, the double-sided adhesive product required by the customer includes a carrier film layer, which is divided into a glue area with a double-sided adhesive layer and a glue-free area protruding outward and connected to the glue area. The glue-free area is provided with a through hole. This product is provided with a circular hole structure. This circular hole structure usually requires a blanking die. The blanking die is more expensive than ordinary die-cutting tools. The cost is high. Usually, the cost of the blanking die needs to be increased by more than 1,500 yuan for each additional row of blanking holes. The cost is relatively high and is not conducive to improving economic benefits. Therefore, the number of holes in the blanking die (the number of holes is the number of products) is usually designed to be small. In order to cooperate with the blanking die, the number of holes on the die used in other die-cutting steps is consistent with the blanking die. This processing method can obtain a small number of products by punching at one time, which will increase the number of punching and cutting times and increase labor costs. Therefore, how to increase production capacity without changing the number of holes in the blanking die is an urgent problem to be solved. Summary of the invention

[0004] The purpose of the present invention is to provide a die-cutting tool assembly for processing double-sided adhesive products with holes in order to overcome the defect of low product processing capacity in the above-mentioned prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A die-cutting tool assembly for processing a double-sided adhesive product with holes, the double-sided adhesive product comprising a carrier film layer, the carrier film layer being divided into a glue area with a double-sided adhesive layer attached thereto and a glue-free area protruding outwardly and connected to the glue area, the glue-free area being provided with a through hole;

[0007] The die-cutting tool assembly comprises a first die-cutting tool, a second die-cutting tool and a third die-cutting tool for punching the material strip in sequence;

[0008] The first die-cutting tool is provided with a plurality of rows of transverse knife line groups arranged along the feeding direction of the material strip, each row of transverse knife line groups includes a plurality of transverse knife lines arranged along the width direction of the material strip; the transverse knife lines include an inner contour knife line matching the contour of the connection between the adhesive area and the non-adhesive area, a first auxiliary knife line connected to the inner contour knife line and located in the non-product area, and a second auxiliary knife line extending along the feeding direction of the material strip;

[0009] The second die-cutting tool is provided with a set of through-hole cutter lines, the through-hole cutter line set includes a plurality of through-hole cutter lines arranged along the width direction of the material strip, and the second die-cutting tool performs blanking and punching on the material strip to generate waste material matching the through-hole structure;

[0010] The third die-cutting tool is provided with a plurality of product contour cutter line groups arranged along the feeding direction of the material strip, each of which includes a plurality of product contour cutter lines arranged along the width direction of the material strip, and the product contour cutter lines punch out the outer contour of the product on the material strip;

[0011] The first die-cutting tool and the third die-cutting tool punch and cut according to multiple steps, and the multiple steps are the total length of the plurality of columns of transverse knife line groups; the second die-cutting tool punches and cuts according to single steps, and the single steps are the length of each column of transverse knife line groups;

[0012] The first die-cutting tool has several positioning hole cutter line groups and a first positioning pin group, and the spacing between the positioning hole cutter line groups is a single pitch length and the number of the positioning hole cutter line groups is the same as the number of columns of the transverse cutter line groups; each time the material strip is positioned and punched, the hole structure obtained by punching is sleeved on the first positioning pin group as a positioning hole, and the positioning hole cutter line group punches a new hole structure on the material strip as a positioning hole for the next punching; the second die-cutting tool is provided with a second positioning pin group, and the third die-cutting tool is provided with a third positioning pin group, and the second positioning pin group and the third positioning pin group extend into the positioning holes processed by the positioning hole cutter lines to position the material strip.

[0013] In the present invention, ordinary die-cutting tools such as the first die-cutting tool and the third die-cutting tool adopt multiple-step punching. At the same time, the first die-cutting tool will process positioning holes with a spacing of single-step punching on the material strip during the punching process. These positioning holes are used for the subsequent positioning of the second die-cutting tool and the third die-cutting tool. By redesigning the positioning hole knife line group, the second die-cutting tool for blanking and punching can cooperate with the die-cutting tools in other steps, which greatly improves the production capacity without changing the blanking and punching tool.

[0014] The number of columns of the transverse cutter line group on the first die-cutting tool and the number of columns of the product contour cutter line group on the third die-cutting tool are 2 to 3 respectively.

[0015] The number of columns of the transverse cutter line group on the first die-cutting tool and the number of columns of the product contour cutter line group on the third die-cutting tool are respectively 3 columns.

[0016] The number of transverse cutter lines in the transverse cutter line group, the number of through-hole cutter lines in the through-hole cutter line group and the number of product contour cutter lines in the product contour cutter line group are the same, which are all 1 to 4.

[0017] The number of transverse cutter lines in the transverse cutter line group, the number of through-hole cutter lines in the through-hole cutter line group, and the number of product contour cutter lines in the product contour cutter line group are all 4.

[0018] The number of holes in the product should not be increased too much. If the number of holes increases too much and there are too many knife lines, and the tonnage of each die-cutting machine is limited, it will cause unstable pressure during punching and cause poor punching. After testing, it is best for the first die-cutting tool and the third die-cutting tool to have no more than 3 columns of knife lines in the feeding direction of the material strip, and no more than 4 rows of knife lines in the width direction of the material strip.

[0019] For multi-step punching, the two punching steps in the existing punching method punch the same contour of the product, which will cause burrs on the contour of the product, affecting the appearance quality of the product. In order to further solve the burr problem of the product, the present invention further re-sets the knife line.

[0020] The first auxiliary knife line and the second auxiliary knife line are both located in the non-product area, and the contour obtained by punching the third die-cutting tool on the adhesive area is located on the surface of the double-sided adhesive tape processed by the first die-cutting tool. When processing the double-sided adhesive tape, the first die-cutting tool does not directly punch out the entire contour of the double-sided adhesive tape, but only punches out the contour of the double-sided adhesive tape located in the middle of the surface of the carrier film. The contour of the double-sided adhesive tape and the carrier film overlapping above and below is completed by punching by the third die-cutting tool, and the edge where the double-sided adhesive tape is placed is punched twice, which solves the problem of burrs.

[0021] Among the plurality of columns of transverse cutting line groups, one transverse cutting line located at the end is composed of an inner contour cutting line and a first auxiliary cutting line.

[0022] The present invention omits a second auxiliary knife line of a transverse knife line, reduces the number of knife lines of the first die-cutting tool, and improves die-cutting stability.

[0023] The positioning hole cut line group includes two positioning hole cut lines respectively arranged on both sides of the transverse cut line group; the positioning hole cut lines are cut lines with a C-shaped hole structure.

[0024] By using the C-shaped hole structure of the knife line, the circular scrap obtained by punching remains connected to the main body of the material strip, and there is no problem of circular scrap discharge.

[0025] Along the feeding direction of the material strip, the first die-cutting tool is provided with two first positioning pin groups, and the first positioning pin group includes two positioning pins respectively arranged on both sides of the transverse knife line group.

[0026] When machining the locating holes, two first locating pin groups are used to ensure the accuracy of the position of the next locating hole.

[0027] A positioning pin is provided on the second die-cutting tool and the third die-cutting tool.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] (1) The present invention, without adding a blanking die (a second die-cutting tool), redesigns other common dies (a first die-cutting tool and a third die-cutting tool) that cooperate with the blanking die, thereby greatly increasing the number of cavities on the common die. When the number of cavities on the common die is increased by 2 times, the production capacity is increased by about 2.5 times, and the labor cost is significantly reduced;

[0030] (2) The present invention arranges the first auxiliary cutting line and the second auxiliary cutting line on the first die-cutting tool in the non-product area, so that the first die-cutting tool and the third die-cutting tool will not repeatedly punch and cut the same part of the double-sided adhesive tape, thereby avoiding the generation of burrs on the double-sided adhesive layer and improving product quality;

[0031] (3) When the first die-cutting tool continuously punches on the surface of the material strip, the contours obtained by the two adjacent punchings are connected at the ends. Therefore, the overall knife line formed by the inner contour knife line and the first auxiliary knife line does not need to be strictly aligned with the second auxiliary knife line in the width direction of the material strip, thereby reducing the processing difficulty of the first die-cutting tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a row of double-sided adhesive products obtained by punching according to the present invention;

[0033] Figure 2 It is a schematic structural diagram of the first die-cutting tool in the present invention;

[0034] Figure 3 It is a schematic diagram of the material strip structure after one punching in the present invention;

[0035] Figure 4 It is a structural schematic diagram of the second die-cutting tool in the present invention;

[0036] Figure 5 It is a schematic diagram of the material strip structure after secondary punching in the present invention;

[0037] Figure 6 It is a schematic structural diagram of the third die-cutting tool in the present invention;

[0038] Figure 7It is a schematic diagram of the material strip structure after three punchings in the present invention;

[0039] In the figure, 1 is a double-sided adhesive product, 11 is a bearing film layer, 12 is a non-adhesive area, 13 is a through hole, 14 is a double-sided adhesive layer, 2 is a first die-cutting tool, 21 is a transverse knife line, 211 is an inner contour knife line, 212 is a first auxiliary knife line, 213 is a second auxiliary knife line, 22 is a positioning hole knife line group, 23 is a first positioning pin group, 3 is a second die-cutting tool, 31 is a through hole knife line, 32 is a second positioning pin group, 4 is a third die-cutting tool, 41 is a product contour knife line, and 42 is a third positioning pin group. DETAILED DESCRIPTION

[0040] 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.

[0041] Example

[0042] A die-cutting tool assembly for processing double-sided adhesive products with holes, used for processing Figure 1 The double-sided adhesive product shown in the figure comprises a carrier film layer 11, which is divided into a glue area with a double-sided adhesive layer 14 and a non-glue area 12 protruding outwardly and connected to the glue area, and a through hole 13 is provided in the non-glue area 12.

[0043] The die-cutting tool assembly includes a first die-cutting tool 2, a second die-cutting tool 3 and a third die-cutting tool 4 for punching the material strip in sequence. It should be known in the art that when punching, the position of each die-cutting tool in the width direction of the material strip and the position in the length direction of the material strip should match one by one. The product cutter lines on the first die-cutting tool 2 and the third die-cutting tool 4 are distributed in a 3×4 matrix, and the product cutter lines on the second die-cutting tool 3 are distributed in a 1×4 matrix.

[0044] like Figure 2As shown, the first die-cutting tool 2 is provided with three rows of transverse knife line groups arranged along the feeding direction of the material strip, and each row of transverse knife line groups includes four transverse knife lines 21 arranged along the width direction of the material strip; the transverse knife line 21 includes an inner contour knife line 211 matching the contour of the connection between the adhesive area and the non-adhesive area 12, a first auxiliary knife line 212 connected to the inner contour knife line 211 and located in the non-product area, and a second auxiliary knife line 213 extending along the feeding direction of the material strip. The transverse knife line 21 located at the bottom, that is, the closest to the side of the material strip, is only composed of the inner contour knife line 211 and the first auxiliary knife line 212, and the side of the material strip constitutes a straight line contour corresponding to the second auxiliary knife line 213; during punching, the carrier film, double-sided tape and auxiliary protective film are sequentially attached to the supporting material strip, and the first die-cutting tool 2 is used for die-cutting. The punching layers are the auxiliary protective film and the double-sided tape, and a contour pattern connected to the end is processed on the double-sided tape, as shown Figure 3 As shown in the figure, the shaded area is the product area, and the double-sided tape in the non-product area is discarded.

[0045] like Figure 4 As shown, a set of through-hole cutter lines is provided on the second die-cutting tool 3, and the through-hole cutter line group includes a plurality of through-hole cutter lines 31 arranged along the width direction of the material strip. The second die-cutting tool 3 performs blanking and punching on the material strip to produce waste material matching the through-hole 13 structure, and obtains the following Figure 5 The material strip shown;

[0046] like Figure 6 As shown, the third die-cutting tool 4 is provided with a plurality of product contour cutter line groups arranged along the feeding direction of the material strip, each of which includes a plurality of product contour cutter lines 41 arranged along the width direction of the material strip, and the product contour cutter lines 41 punch out the outer contour of the product on the material strip, so as to obtain the following Figure 7 As shown in the material strips, the waste materials outside each double-sided adhesive product are still kept as a whole, which is convenient for waste discharge.

[0047] In order to solve the problem of burrs on the double-sided adhesive tape, in this embodiment, the first auxiliary knife line 212 and the second auxiliary knife line 213 are both located in the non-product area, and the contour obtained by punching the third die-cutting tool 4 on the adhesive area is located on the surface of the double-sided adhesive tape processed by the first die-cutting tool 2, such as Figure 7 As shown, the contours punched out by the first auxiliary knife line 212 and the second auxiliary knife line 213 are located outside the product contour knife line, and the two do not overlap.

[0048] The first die-cutting tool 2 and the third die-cutting tool 4 have a punching step of 38.76MM according to the 3-step punching step, which is the total length of several rows of transverse knife lines 21. The second die-cutting tool 3 has a punching step of 12.92mm according to the single-step punching step, which is the length of each row of transverse knife line groups. In order to achieve precise positioning between tools with different step pitches, the three positioning hole knife line groups 22 and the two first positioning pin groups 23 on the first die-cutting tool 2 form a straight line in the feeding direction of the material strip, and the three positioning hole knife line groups 22 and the two first positioning pin groups 23 are arranged at equal intervals, and the spacing is set to a single punching step. Each time the material strip is positioned and punched, the punched hole structure is sleeved onto the first positioning pin group 23 as a positioning hole, and the positioning hole knife line group 22 punches a new hole structure on the material strip as the positioning hole for the next punching. The first die-cutting tool 2 can process a series of positioning holes with a single pitch on the material strip, such as Figure 3 As shown in the positioning holes on both sides of the material strip. Using these positioning holes, in conjunction with the second die-cutting tool 3 provided with a second positioning pin group 32, the third die-cutting tool 4 provided with a third positioning pin group 42, the second positioning pin group 32 and the third positioning pin group 42 extend into the positioning holes processed by the positioning hole cutter line to position the material strip at a single step or 3 times the step. In this embodiment, the positioning hole cutter line group 22 includes two positioning hole cutter lines respectively arranged on both sides of the transverse cutter line group; the positioning hole cutter line is a cutter line of a C-shaped hole structure; along the feeding direction of the material strip, the first die-cutting tool 2 is provided with two first positioning pin groups 23, and the first positioning pin group 23 includes two positioning pins respectively arranged on both sides of the transverse cutter line group; the second die-cutting tool 3 and the third die-cutting tool 4 are provided with a positioning pin group. Regarding the positioning in the width direction of the material strip, it is sufficient to ensure that the spacing of the cutter lines in each column is the same and the distance between the positioning pins is the same.

[0049] In this embodiment, the number of through-hole knife lines on the second die-cutting tool 3 for blanking is not increased. For this embodiment, the cost of adding a row of positioning hole knife line groups for blanking is increased by about 1,500 yuan or more, which is relatively expensive; therefore, the second die-cutting tool 3 remains unchanged, and two rows of corresponding knife line groups are added to the ordinary die-cutting tool (the first die-cutting tool and the third die-cutting tool), and the production capacity is increased by about 2.5 times, which greatly reduces the labor cost and improves the processing efficiency.

[0050] Regarding the installation of the first die-cutting tool 2, the second die-cutting tool 3 and the third die-cutting tool 4, they can be directly installed on the die-cutting machine. The feed roller and winding roller that cooperate with the first die-cutting tool 2, the second die-cutting tool 3 and the third die-cutting tool 4 are technical contents that can be understood by those skilled in the art. For the product of this embodiment, the die-cutting steps are: (a) laminating the carrier film on the bottom tape, then laminating the double-sided tape, and then laminating the first auxiliary release film, using the first die-cutting tool to punch out a pattern on the double-sided tape, discarding the double-sided tape in the non-product area, and then tearing off all the first auxiliary release films; (b) using the second die-cutting tool to blank and punch the material tape to form a circular through hole in the glue-free area. Since it is blanking and punching, there is no need to discard; (c) using the third die-cutting tool to punch the material tape to punch out the outer contour of the product to obtain a product arranged on the bottom tape; those skilled in the art can easily think of other devices that cooperate with the first die-cutting tool 2, the second die-cutting tool 3 and the third die-cutting tool 4 of the present invention, such as feed rollers, winding rollers and laminating machines, etc.

[0051] 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 die-cutting tool assembly for processing a double-sided adhesive product with holes, the double-sided adhesive product (1) comprising a carrier film layer (11), the carrier film layer (11) being divided into a glue area with a double-sided adhesive layer (14) and a glue-free area (12) protruding outwardly and connected to the glue area, the glue-free area (12) being provided with a through hole (13); It is characterized in that The die-cutting tool assembly comprises a first die-cutting tool (2), a second die-cutting tool (3) and a third die-cutting tool (4) for punching the material strip in sequence; The first die-cutting tool (2) is provided with a plurality of rows of transverse knife line groups arranged along the material strip feeding direction, each row of transverse knife line groups comprising a plurality of transverse knife lines (21) arranged along the material strip width direction; the transverse knife lines (21) comprising an inner contour knife line (211) matching the contour of the connection between the adhesive area and the non-adhesive area (12), a first auxiliary knife line (212) connected to the inner contour knife line (211) and located in the non-product area, and a second auxiliary knife line (213) extending along the material strip feeding direction; The second die-cutting tool (3) is provided with a group of through-hole cutter lines, the through-hole cutter line group including a plurality of through-hole cutter lines (31) arranged along the width direction of the material strip, and the second die-cutting tool (3) performs blanking and punching on the material strip to produce waste material matching the structure of the through-hole (13); The third die-cutting tool (4) is provided with a plurality of rows of product contour cutter line groups arranged along the feeding direction of the material strip, each row of product contour cutter line groups includes a plurality of product contour cutter lines (41) arranged along the width direction of the material strip, and the product contour cutter lines (41) punch out the outer contour of the product on the material strip; The first die-cutting tool (2) and the third die-cutting tool (4) perform punching according to a multiple step distance, the multiple punching step distance being the total length of the plurality of rows of transverse knife line (21) groups, and the second die-cutting tool (3) performs punching according to a single step distance, the single punching step distance being the length of each row of transverse knife line groups; The first die-cutting tool (2) is provided with a plurality of positioning hole cutter line groups (22) and a first positioning pin group (23), wherein the spacing between the positioning hole cutter line groups (22) is a single-step length and the number of the positioning hole cutter line groups (22) is the same as the number of columns of the transverse cutter line groups; each time the material strip is positioned and punched, the hole structure obtained by punching is sleeved onto the first positioning pin group (23) as a positioning hole, and the positioning hole cutter line group (22) punches out a new hole structure on the material strip as a positioning hole for the next punching; the second die-cutting tool (3) is provided with a second positioning pin group (32), and the third die-cutting tool (4) is provided with a third positioning pin group (42), and the second positioning pin group (32) and the third positioning pin group (42) extend into the positioning holes processed by the positioning hole cutter lines to position the material strip.

2. A die-cutting tool assembly for processing a double-sided adhesive product with holes according to claim 1, characterized in that: The number of columns of the transverse cutter line group on the first die-cutting tool (2) and the number of columns of the product contour cutter line group on the third die-cutting tool (4) are 2 to 3 respectively.

3. A die-cutting tool assembly for processing a double-sided adhesive product with holes according to claim 2, characterized in that: The number of columns of the transverse cutter line group on the first die-cutting tool (2) and the number of columns of the product contour cutter line group on the third die-cutting tool (4) are respectively 3.

4. The die-cutting tool assembly for processing a double-sided adhesive product with holes according to claim 1, characterized in that: The number of transverse cutter lines (21) in the transverse cutter line group, the number of through hole cutter lines (31) in the through hole cutter line group and the number of product contour cutter lines (41) in the product contour cutter line group are the same, all being 1 to 4.

5. The die-cutting tool assembly for processing a double-sided adhesive product with holes according to claim 1, characterized in that: The number of transverse cutter lines (21) in the transverse cutter line group, the number of through-hole cutter lines (31) in the through-hole cutter line group, and the number of product contour cutter lines (41) in the product contour cutter line group are all 4.

6. The die-cutting tool assembly for processing a double-sided adhesive product with holes according to claim 1, characterized in that: The first auxiliary knife line (212) and the second auxiliary knife line (213) are both located in the non-product area, and the contour obtained by punching the third die-cutting tool (4) on the adhesive area is located on the surface of the double-sided adhesive tape processed by the first die-cutting tool (2).

7. The die-cutting tool assembly for processing a double-sided adhesive product with holes according to claim 1, characterized in that: Among the plurality of columns of transverse knife line groups, one transverse knife line (21) located at the end is composed of an inner contour knife line and a first auxiliary knife line (212).

8. The die-cutting tool assembly for processing a double-sided adhesive product with holes according to claim 1, characterized in that: The positioning hole cutter line group (22) comprises two positioning hole cutter lines respectively arranged on both sides of the transverse cutter line group; the positioning hole cutter lines are cutter lines with a C-shaped hole structure.

9. The die-cutting tool assembly for processing a double-sided adhesive product with holes according to claim 1, characterized in that: Along the feeding direction of the material strip, the first die-cutting tool (2) is provided with two first positioning pin groups (23), and the first positioning pin groups (23) include two positioning pins respectively arranged on both sides of the transverse knife line group.

10. The die-cutting tool assembly for processing a double-sided adhesive product with holes according to claim 1, characterized in that: A positioning pin group is provided on the second die-cutting tool (3) and the third die-cutting tool (4).

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