Method for improving product edge turnup in die cutting

Abstract

The invention discloses a method for improving flanging of the edge of a product in die cutting, which enables the edge of the product obtained by die cutting to be a vertical edge without radian so as to ensure reliable manufacturing of the product. A finally-formed closed cutter point is decomposed into two sets of cutter points for die cutting operation, the two sets of cutter points are the first L cutter point and the second L cutter point, the first L cutter point and the second L cutter point corresponding to the position of the same product are combined to form a closed rectangular cutter point, the first L cutter point punches the edges of the first long edge and the first short edge of the product firstly, and then the second L cutter point punches the edges of the second long edge and the second short edge of the product. The second L-shaped cutter point punches the edges of the second long edge and the second short edge of the product.

Description

Technical Field

[0001] The invention relates to the technical field of product die-cutting, and in particular to a method for improving product edge flanging during die-cutting. Background Art

[0002] Processing and production Figure 1 The die-cut product shown in the figure is composed of double-sided tape + PET + double-sided tape. The four sides of the product are all flat vertical surfaces. The upper and lower surfaces of the product are all line-contact transitions, and there is no arc transition. In actual processing, the bottom surface of the product is also provided with a release film. The combination of the product and the release film is shown in Figure 2 The right side of the release film is extended outward. In the prior art, the product and the bottom release film are integrally die-cut by a closed knife during processing. The obtained product shape is shown in FIG. Figure 3 , an arc is formed around the upper surface of the product, which leads to the appearance of the product not meeting the standard; the reason is that the blades of the closed cutting dies on the market are formed by two-sided milling, and the inner straight knife die is not completely straight, and there will be a certain angle reserved at the blade. The wall thickness of the conventional inner straight knife is about 0.06mm. When the knife cuts into the material under the die, the inner straight knife direction will also have a certain extrusion on the material. Materials with a certain shrinkage ability can reduce or offset the extrusion and shaping of the material caused by the bevel or wall thickness of the inner straight knife direction through shrinkage, such as PSA adhesive layer, foam, rubber, paper materials, etc.; materials without shrinkage ability will be extruded and shaped, and a certain arc edge will be formed on the edge of the material, such as PET, PC, absorbing materials and other materials.

[0003] Since the material of the product to be manufactured includes PET, an arc is generated on the upper surface of the product when it is punched by a closed knife. Summary of the invention

[0004] In view of the above problems, the present invention provides a method for improving the edge flanging of a product during die cutting, which makes the edge of the product obtained by die cutting a vertical edge without curvature, thereby ensuring the reliable production of the product.

[0005] A method for improving product edge flanging during die cutting, characterized in that: the finally formed closed blade is decomposed into two groups of blades for die cutting operation, the two groups of blades are a first L blade and a second L blade, the first L blade and the second L blade corresponding to the same product position are combined to form a closed rectangular blade, the first L blade first punches the edges of the first long side and the first short side of the product, and the second L blade punches the edges of the second long side and the second short side of the product.

[0006] It is further characterized by:

[0007] The upper double-sided adhesive tape, PET, lower double-sided adhesive tape, and bottom release film to be punched are arranged in advance to obtain a layout diagram of the formed product, and the products are arranged into a matrix structure of several rows and columns. Then, the waste on one side of the adjacent position of each row of the upper double-sided adhesive tape, PET, and lower double-sided adhesive tape is removed by a closed die, and then all the closed waste is removed. Then, the first L blade of the first die is used to punch the edges of the first long side and the first short side of the laid-out formed product, and then the second L blade of the second die is used to punch the edges of the second long side and the second short side of the laid-out formed product, and then the waste area of ​​the bottom release film is used for waste removal;

[0008] The first L blade and the second L blade are both straight blades corresponding to the edges of the strip formed product, which ensures that the edges of the product obtained by punching will not produce arcs;

[0009] The outer blade of the closed die cutter corresponds to the shrinkage area of ​​the bottom release film as an outer straight blade, which ensures that when the closed die cuts downward, the corresponding edges of the upper double-sided adhesive tape, PET, and the lower double-sided adhesive tape are vertically punched, so that no arc is generated;

[0010] The closed die cuts the upper double-sided adhesive, PET and the lower double-sided adhesive from top to bottom without damaging the bottom release film;

[0011] A gap is left between the other end of the closed die cutter in the length direction and the upper double-sided tape, PET, and lower double-sided tape on the right side thereof, so as to leave a margin for the die cutting of the first L die cutter, thereby ensuring the reliable operation of the first L die cutter;

[0012] During typesetting, the spacing between adjacent products is small, and the closed die is divided into two groups of die for distribution die cutting. Four groups of products enclosed to form a rectangle become a unit. The first closed die structure after the first closed die is combined is used to die cut the waste in the corresponding area of ​​the two groups of products forming a diagonal line, and the second closed die structure after the second closed die is combined is used to die cut the waste in the corresponding area of ​​the two groups of products forming another diagonal line.

[0013] First positioning holes are arranged on both sides of the first closed cutting die structure, second alignment holes are arranged on both sides of the second closed cutting die structure, third alignment holes are arranged on both sides of the first cutting die, and fourth alignment holes are arranged on both sides of the second cutting die. The first alignment hole is respectively aligned with the second alignment hole, the third alignment hole and the fourth alignment hole to ensure the accuracy of die-cutting.

[0014] After adopting the above technical scheme, the closed cutting die for forming the originally closed product is split along the diagonal line, so that the two sides of the same group of opposite sides of the final die-cut product are not on the same hole. The first L blade first punches the edges of the first long side and the first short side, and the second L blade punches the edges of the second long side and the second short side. When punching the product, the material will not be squeezed, thereby improving the abnormal arc on the surface of the product. The edge of the product obtained by die cutting is a vertical edge without curvature, thereby ensuring the reliable production of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a product of double-sided tape + PET + double-sided tape corresponding to the present invention;

[0016] Figure 2 for Figure 1 A top view of a product placed on a bottom release film;

[0017] Figure 3 A three-dimensional diagram of a product of double-sided adhesive tape + PET + double-sided adhesive tape obtained by a conventional method (the arrow in the figure indicates an arc);

[0018] Figure 4 It is a schematic diagram of a typesetting product of a specific embodiment of the present invention;

[0019] Figure 5 A layout diagram of a cutter die in a waste punching area applicable to a specific embodiment;

[0020] Figure 6 A die layout diagram for punching a product shape suitable for a specific embodiment;

[0021] The names corresponding to the serial numbers in the figure are as follows:

[0022] Upper double-sided adhesive tape 1, PET 2, lower double-sided adhesive tape 3, bottom release film 4, closed knife die 5, first L blade 6, second L blade 7;

[0023] The first closed cutting die structure 10, the first positioning hole 11, the second closed cutting die structure 20, the second alignment hole 21, the product 30, the first long side 31, the first short side 32, the second long side 33, the second short side 34, the first cutting die 40, the third alignment hole 41, the second cutting die 50, and the fourth alignment hole 51. DETAILED DESCRIPTION

[0024] A method for improving the edge flanging of a product during die cutting, see Figure 1 , Figure 2 as well as Figure 4-Figure 6 : The upper double-sided adhesive tape 1, PET 2, lower double-sided adhesive tape 3, and bottom release film 4 to be punched are arranged in advance by typesetting to obtain a layout diagram of a molded product 30 (see Figure 4), each page is arranged in a matrix structure of 8 rows and 4 columns;

[0025] During typesetting, the spacing between adjacent products 30 is small, and the closed die dies 5 are divided into two groups of die dies for distribution and die cutting. The four groups of products enclosed to form a rectangle become a unit. The first closed die die structure 10 after the first closed die die combination is used to die cut the waste materials in the corresponding area of ​​the two groups of products on one diagonal line, and the second closed die die structure 20 after the second closed die die combination is used to die cut the waste materials in the corresponding area of ​​the two groups of products 30 on the other diagonal line.

[0026] The waste area is provided with two sets of knife die structures, each set of closed knife die 5 punches the upper double-sided adhesive tape 1, PET 2, and the lower double-sided adhesive tape 3 from top to bottom without damaging the bottom release film 4;

[0027] There is a gap between the right end of each set of closed die cutters 5 in the length direction and the upper double-sided adhesive tape 1, PET 2, and the lower double-sided adhesive tape 3 on the right side thereof, so as to leave a margin for the die cutting of the first L blade 6, thereby ensuring the reliable operation of the first L blade 6;

[0028] The closed knife used for punching the final shape of the product is decomposed into two groups of knife dies for die-cutting operations. The two groups of knife dies are a first knife die 40 and a second knife die 50. The first knife die is provided with 32 groups of downwardly convex first L blades 6, and the second knife die 50 is provided with 32 groups of downwardly convex second L blades 7. The first L blades 6 and the second L blades 7 corresponding to the same product position are combined to form a rectangular closed blade peak. The first L blade 6 first punches the edges of the first long side 31 and the first short side 32 of the product 30, and the second L blade 7 punches the edges of the second long side 33 and the second short side 34 of the product 30.

[0029] In specific implementation, the first L blade 6 and the second L blade 7 corresponding to the edge of the strip formed product 30 are both straight blades, which ensure that the edge of the product obtained by punching will not produce an arc;

[0030] The outer blade of the closed die 5 corresponds to the shrinkage area of ​​the bottom release film 4 and is an outer straight blade, which ensures that when the closed die 5 is die-cut downward, the corresponding edges of the upper double-sided tape 1, PET2, and the lower double-sided tape 3 are vertically punched so that no arc is generated.

[0031] During specific implementation, first positioning holes 11 are provided on both sides of the first closed cutting die structure 10, second alignment holes 21 are provided on both sides of the second closed cutting die structure 20, third alignment holes 41 are provided on both sides of the first cutting die 40, and fourth alignment holes 51 are provided on both sides of the second cutting die 50. The first alignment hole 11 is respectively aligned with the second alignment hole 21, the third alignment hole 41, and the fourth alignment hole 51 to ensure the accuracy of die-cutting.

[0032] Its working principle is as follows: the closed die used to form the originally closed product is split along the diagonal line, so that the two sides of the same group of opposite sides of the final die-cut product are not on the same hole. The first L die first punches the edges of the first long side and the first short side, and the second L die punches the edges of the second long side and the second short side. When punching the product, the material will not be squeezed, thereby improving the abnormal arc on the surface of the product. The edge of the product obtained by die-cutting is a vertical edge without curvature, thereby ensuring the reliable production of the product.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for improving product edge flanging during die cutting, characterized in that: The finally formed closed blade is decomposed into two groups of blades for die-cutting operation. The two groups of blades are a first L blade and a second L blade. The first L blade and the second L blade corresponding to the same product position are combined to form a closed rectangular blade. The first L blade first cuts the edges of the first long side and the first short side of the product, and the second L blade cuts the edges of the second long side and the second short side of the product.

2. A method for improving product edge flanging during die cutting according to claim 1, characterized in that: The upper double-sided tape, PET, lower double-sided tape and bottom release film to be punched are arranged in advance through layout to obtain a layout diagram of the molded product. The products are arranged into a matrix structure of several rows and columns. Then, the waste on one side of the adjacent position of each row of the upper double-sided tape, PET and lower double-sided tape is removed by a closed die, and then all the closed waste is removed. Then, the first L blade of the first die is used to punch out the edges of the first long side and the first short side of the laid-out molded product, and then the second L blade of the second die is used to punch out the edges of the second long side and the second short side of the laid-out molded product, and then the waste discharge operation is carried out through the waste area of ​​the bottom release film.

3. A method for improving product edge flanging during die cutting according to claim 2, characterized in that: The first L blade and the second L blade are both straight blades corresponding to the edges of the strip formed product.

4. A method for improving product edge flanging during die cutting according to claim 2, characterized in that: The outer blade edge of the closed knife die corresponding to the shrinkage area of ​​the bottom release film is an outer straight blade edge.

5. A method for improving product edge flanging during die cutting according to claim 4, characterized in that: The closed knife die punches the upper double-sided adhesive tape, PET, and the lower double-sided adhesive tape from top to bottom without damaging the bottom release film.

6. A method for improving product edge flanging during die cutting according to claim 2, characterized in that: A gap is left between the other end of the closed die cutter in the length direction and the upper double-sided tape, PET and lower double-sided tape on the right side thereof, so as to leave a margin for die cutting by the first L die cutter.

7. A method for improving product edge flanging during die cutting according to claim 2, characterized in that: During typesetting, the spacing between adjacent products is small, and the closed die is divided into two groups of die for distributed die cutting. The four groups of products enclosed to form a rectangle become a unit. The first closed die structure after the first closed die is combined is used to die-cut the waste materials in the corresponding areas of the two groups of products forming a diagonal line, and the second closed die structure after the second closed die is combined is used to die-cut the waste materials in the corresponding areas of the two groups of products on the other diagonal line.

8. A method for improving product edge flanging during die cutting according to claim 7, characterized in that: First positioning holes are arranged on both sides of the first closed cutting die structure, second alignment holes are arranged on both sides of the second closed cutting die structure, third alignment holes are arranged on both sides of the first cutting die, fourth alignment holes are arranged on both sides of the second cutting die, and the first alignment hole is respectively arranged to align with the second alignment hole, the third alignment hole and the fourth alignment hole.

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