CN114571527B - Anti-falling sheet manufacturing method of conductive foam die-cut piece - Google Patents
Anti-falling sheet manufacturing method of conductive foam die-cut piece Download PDFInfo
- Publication number
- CN114571527B CN114571527B CN202011373746.9A CN202011373746A CN114571527B CN 114571527 B CN114571527 B CN 114571527B CN 202011373746 A CN202011373746 A CN 202011373746A CN 114571527 B CN114571527 B CN 114571527B
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- die
- waste
- conductive foam
- die cutting
- material belt
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D11/00—Combinations of several similar cutting apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention relates to a method for manufacturing an anti-falling sheet of a conductive foam die-cut piece, wherein the conductive foam comprises polyurethane sponge, conductive cloth and conductive adhesive, and the method comprises the following steps: (1) first-stage material belt lamination: attaching a release film (12) to the protective film (11) to form a first-stage material belt; (2) one-die cutting: carrying out one-punch die cutting on the primary material belt in one-punch die cutting machine; (3) attaching a secondary material belt: attaching conductive foam (21) to the release film (12) to form a secondary material belt; (4) cutting and discharging waste by a double die: carrying out secondary punching die cutting on the secondary material belt in a secondary punching die cutting machine, and discharging secondary punching first waste (31) and secondary punching second waste (32) to form a finished product of the foam die cutting piece; and (5) rolling the die-cut piece product: and rolling the finished product of the foam die-cut piece. Compared with the prior art, the invention has the advantages of low defective rate of falling sheets, no consumption of man-hour and manpower, and the like.
Description
Technical Field
The invention relates to the field of die-cutting piece processing, in particular to a method for manufacturing an anti-falling piece of a conductive foam die-cutting piece.
Background
The foam is a material foamed by plastic particles; the omnidirectional conductive foam is polyurethane sponge through an electroless plating process, has excellent X-Y-Z triaxial conductive performance as an EMI material, has excellent flexibility and high elasticity, and can be compounded with a polyurethane sponge base material: the conductive cloth, the conductive copper foil, the conductive aluminum foil and the conductive gauze are glued through the conductive adhesive; the appearance of the polyurethane sponge is grey, black and brown; because of its excellent conductivity and good electromagnetic shielding effect, it is widely used in PDP televisions, LCD displays, liquid crystal televisions, mobile phones, notebook computers, MP3, communication cabinets, medical instruments and other electronic products, and in the military and aerospace fields, and general conductive foam includes polyurethane sponge, conductive cloth and conductive adhesive, as shown in fig. 9.
When facing thinner foam die-cutting pieces, for example, foam die-cutting pieces with the width of 1.5mm and the length of about 44.9mm are used for finishing foam shape punching, sheet dropping and displacement phenomena can be generated when profile waste is discharged, namely, products can be carried away when waste is discharged, the product area is exposed or the products are displaced, the reject ratio is up to 50%, an operator spends a lot of time in machine adjustment during die cutting, manual staff is required to fill the exposed part after die cutting, and man-hour and manpower are also wasted.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the anti-falling sheet manufacturing method of the conductive foam die-cut piece, which has low sheet falling reject ratio and does not consume labor time and labor.
The aim of the invention can be achieved by the following technical scheme:
when the waste discharge direction is nearly vertical to the side frame of the die-cutting piece, the waste discharge direction is a line, the cutting interface of the conductive adhesive breaks the force of breaking the waste discharge direction when the waste is discharged, and the waste discharge tensile force is insufficient due to the back viscosity of the conductive adhesive, so that the boundary cannot be torn off, the waste brings out the needed structure in the product to form the defect of the product, the defect of poor product is caused, and the later stage needs to manually fill in the empty part, so that the production efficiency is rapidly reduced.
The inventor knows that the situation of the defect is that the waste discharge direction is nearly vertical to the side frame of the die cutting piece, and then the inventor tries to adjust the angle between the waste discharge direction and the side frame of the die cutting piece, and after a plurality of tests, the following specific scheme is obtained:
the manufacturing method of the anti-falling sheet of the conductive foam die-cut piece comprises the following steps:
(1) Laminating of first-stage material belt: attaching the release film to the protective film to form a first-stage material belt;
(2) And (3) punching and die cutting: carrying out one-punch die cutting on the primary material belt in one-punch die cutting machine;
(3) And (3) attaching a secondary material belt: attaching conductive foam to a release film to form a secondary material belt;
(4) Cutting and discharging waste by a secondary die: carrying out secondary punching die cutting on the secondary material belt in a secondary punching die cutting machine, and discharging secondary punching first waste and secondary punching second waste to form a finished product of the foam die cutting piece; the two-punch die-cutting machine is provided with two diesCutter lines c matched with the die cutting patterns, wherein the cutter lines c comprise cutter lines c with an included angle of 45-60 degrees with the running direction of the material belt 2 The knife line c 2 The waste discharging device is positioned at one side of waste discharge firstly; the included angle cannot be too large or too small, if the included angle is in 60-90 degrees with the running direction of the material belt, the edge of the product is still in a nearly vertical state with the running direction of the material belt, and the problem cannot be fundamentally solved; when the die cutting piece is positioned at 0-45 degrees, the die cutting piece can be too slender, the space utilization rate is low, and materials are wasted.
(5) And (3) rolling a die cutting piece product: and rolling the finished product of the foam die-cut piece.
Further, a knife line a matched with a die cutting pattern is arranged on the die cutting machine, and the die cutting layer of the knife line a is a release film.
Further, the knife line a forms an included angle of 30-45 degrees with the running direction of the material belt.
Further, the two-die cutting machine is also provided with a cutter line b matched with the two-die cutting pattern, the punching layer of the cutter line b is conductive foam, and the punching layer of the cutter line c sequentially comprises conductive foam and a release film from top to bottom.
Further, the knife line b comprises knife lines b which are connected in sequence 1 And knife line b 2 The knife line b 1 An included angle of 30-45 degrees is formed between the belt and the running direction.
Further, the knife line c also comprises a knife line c 2 Parallel knife lines c 1 And with knife line c 2 Connected knife line c 3 The knife line c 1 An included angle of 45-60 degrees is formed between the belt and the running direction.
Further, the second punch first waste is discharged before the second punch second waste, and the second punch first waste comprises the conductive foam punched above the release film. At this time, the knife line b is specified 1 And other conductive foam.
Further, the second waste comprises frame waste of conductive foam and frame waste of release film.
Further, the knife line b 2 An included angle of 45-60 degrees is formed between the belt and the running direction.
Further, the knife line c 3 An included angle of 30-45 degrees is formed between the belt and the running direction.
Taking this case as an example, after die cutting, because the die cutting piece is discharged at first and has formed certain angle with the material area direction of operation of one side frame, when having led to discharging, first facing is a point rather than a line, can appear stress concentration's condition for the cutting interface is pulled open fast, along with the continuation of discharging, the phenomenon of stress concentration can continue to sweep remaining part, just so can not have the phenomenon that the cutting interface can't pull open.
Compared with the prior art, the invention has the following advantages:
(1) After die cutting, the frame on the waste discharge side of the die cutting piece forms a certain angle with the running direction of the material belt, so that the cutting interface is quickly pulled away when waste is discharged, and the phenomenon that the cutting interface cannot be pulled away is avoided;
(2) By adopting the technology of the invention, the production efficiency is improved, the manual labor hour for manually repairing the leakage sheet is saved, the material loss is reduced, and the material cost is saved.
Drawings
FIG. 1 is a schematic diagram of a die-cutting apparatus in an embodiment;
FIG. 2 is a schematic drawing of a die cut in an embodiment;
FIG. 3 is a die cut hierarchy diagram of an embodiment;
FIG. 4 is a schematic diagram of a two-die cut in an embodiment;
FIG. 5 is a two die cut hierarchical diagram of an embodiment;
FIG. 6 is a diagram showing a match between one die and two dies in the embodiment;
FIG. 7 is a schematic diagram of an embodiment after two-stroke waste discharge;
FIG. 8 is a block diagram of a die cut piece of the present invention;
FIG. 9 is a diagram of a prior art conductive foam structure;
FIG. 10 is a prior art waste discharge schematic;
the reference numerals in the figures indicate: the protective film 11, the release film 12, the conductive foam 21, the secondary first waste 31 and the secondary second waste 32.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Examples
The method for manufacturing the anti-falling sheet of the conductive foam die-cut piece is shown in fig. 1 and 8, wherein the conductive foam comprises polyurethane sponge, conductive cloth and conductive adhesive, and the method comprises the following steps of:
(1) Laminating of first-stage material belt: attaching a release film 12 to the protective film 11 to form a first-stage material belt;
(2) And (3) punching and die cutting: 2-3, carrying out one-die cutting on the primary material belt in one-die cutting machine; a cutter line a matched with a die cutting pattern is arranged on a die cutting machine, and the die cutting layer of the cutter line a is a release film 12. The knife line a forms an included angle of 30 degrees with the running direction of the material belt.
(3) And (3) attaching a secondary material belt: attaching the conductive foam 21 to the release film 12 to form a secondary material belt;
(4) Cutting and discharging waste by a secondary die: as shown in fig. 4-7, the secondary material belt is subjected to secondary punching die cutting in a secondary punching die cutting machine, and secondary punching first waste 31 and secondary punching second waste 32 are discharged to form a finished product of the foam die cutting piece; the two-punch die cutting machine is provided with a cutter line c matched with the two-punch die cutting pattern, wherein the cutter line c comprises a cutter line c with an included angle of 60 degrees with the running direction of the material belt 2 The knife line c 2 The waste discharging device is positioned at one side of waste discharge firstly; the secondary punching die cutting machine is also provided with a cutter line b matched with the secondary punching die cutting pattern, the punching layer of the cutter line b is conductive foam 21, and the punching layer of the cutter line c sequentially comprises the conductive foam 21 and the release film 12 from top to bottom. The knife line b comprises knife lines b which are connected in sequence 1 And knife line b 2 Knife line b 1 An included angle of 30 degrees is formed between the belt and the running direction. The knife line c also comprises a knife line c 2 Parallel knife lines c 1 And with knife line c 2 Connected knife line c 3 Knife line c 1 An included angle of 60 degrees is formed between the belt and the running direction. Knife line b 2 An included angle of 60 degrees is formed between the belt and the running direction. Knife line c 3 An included angle of 30 degrees is formed between the belt and the running direction. The included angle cannot be too large or too small, if the knife line c 2 When the running direction of the material belt is 60-90 DEG, the product edge is still in running with the material beltThe row direction is in a nearly vertical state, and the problem can not be fundamentally solved; when the die cutting piece is positioned at 0-45 degrees, the die cutting piece can be too slender, the space utilization rate is low, and materials are wasted. The second waste 31 is discharged before the second waste 32, and the second waste 31 includes the conductive foam punched above the release film. At this time, the knife line b is specified 1 And other conductive foam. The secondary waste 32 includes a frame waste of conductive foam and a frame waste of release film.
(5) And (3) rolling a die cutting piece product: and rolling the finished product of the foam die-cut piece.
In this embodiment, after die cutting, since the frame on the waste discharge side of the die cutting member forms a certain angle with the running direction of the material belt, when waste discharge is caused, a point is faced at first instead of a line, stress concentration can occur, so that the cutting interface is pulled away rapidly, and along with the continuous waste discharge, the phenomenon of stress concentration continues to sweep the rest part, so that the phenomenon that the cutting interface cannot be pulled away does not occur.
The defective rate of the product of this example was almost 0. Whereas in the prior art, as shown in FIG. 10, the knife line c 2 The product reject ratio is generally over 30% when the temperature is 60-90 degrees relative to the running direction of the material belt.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. The manufacturing method of the anti-falling sheet of the conductive foam die-cut piece is characterized by comprising the following steps of:
(1) Laminating of first-stage material belt: attaching a release film (12) to the protective film (11) to form a first-stage material belt;
(2) And (3) punching and die cutting: carrying out one-punch die cutting on the primary material belt in one-punch die cutting machine;
(3) And (3) attaching a secondary material belt: attaching conductive foam (21) to the release film (12) to form a secondary material belt;
(4) Cutting and discharging waste by a secondary die: carrying out secondary punching die cutting on the secondary material belt in a secondary punching die cutting machine, and discharging secondary punching first waste (31) and secondary punching second waste (32) to form a finished product of the foam die cutting piece; the two-die cutting machine is provided with a cutter line c matched with the two-die cutting pattern, and the cutter line c comprises a cutter line c with an included angle of 45-60 degrees with the running direction of the material belt 2 The knife line c 2 The waste discharging device is positioned at one side of waste discharge firstly;
(5) And (3) rolling a die cutting piece product: winding the finished product of the foam die-cut piece;
the two-die cutting machine is also provided with a cutter line b matched with the two-die cutting pattern, the die cutting layer of the cutter line b is conductive foam (21), and the die cutting layer of the cutter line c sequentially comprises the conductive foam (21) and a release film (12) from top to bottom;
the knife line c also comprises a knife line c 2 Parallel knife lines c 1 And with knife line c 2 Connected knife line c 3 The knife line c 1 An included angle of 45-60 degrees is formed between the belt and the running direction.
2. The method for manufacturing the anti-falling sheet of the conductive foam die-cutting piece according to claim 1, wherein a knife line a matched with a die-cutting pattern is arranged on the die-cutting machine, and the die-cutting layer of the knife line a is a release film (12).
3. The method for manufacturing the anti-falling sheet of the conductive foam die-cut piece according to claim 2, wherein the knife line a forms an included angle of 30-45 degrees with the running direction of the material belt.
4. The method for manufacturing the anti-falling sheet of the conductive foam die-cut piece according to claim 1, wherein the knife line b comprises the following steps ofConnected knife line b 1 And knife line b 2 The knife line b 1 An included angle of 30-45 degrees is formed between the belt and the running direction.
5. The method for manufacturing the anti-falling sheet of the conductive foam die-cut piece according to claim 1, wherein the secondary punching first waste (31) is discharged before the secondary punching second waste (32), and the secondary punching first waste (31) comprises the conductive foam punched above the release film.
6. The method for manufacturing the anti-falling sheet of the conductive foam die-cut piece according to claim 1, wherein the second waste (32) comprises a frame waste of conductive foam and a frame waste of a release film.
7. The method for manufacturing the anti-falling sheet of the conductive foam die-cut piece according to claim 4, wherein the knife line b is characterized in that 2 An included angle of 45-60 degrees is formed between the belt and the running direction.
8. The method for manufacturing the anti-falling sheet of the conductive foam die-cut piece according to claim 7, wherein the knife line c is characterized in that 3 An included angle of 30-45 degrees is formed between the belt and the running direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011373746.9A CN114571527B (en) | 2020-11-30 | 2020-11-30 | Anti-falling sheet manufacturing method of conductive foam die-cut piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011373746.9A CN114571527B (en) | 2020-11-30 | 2020-11-30 | Anti-falling sheet manufacturing method of conductive foam die-cut piece |
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| CN114571527A CN114571527A (en) | 2022-06-03 |
| CN114571527B true CN114571527B (en) | 2023-12-15 |
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| CN119427448A (en) * | 2025-01-10 | 2025-02-14 | 深圳市池纳光电有限公司 | A punching process for high-precision atomizer foam |
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| JPH1177586A (en) * | 1997-09-04 | 1999-03-23 | Mitsubishi Heavy Ind Ltd | Rotary cutoff device |
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| JP2011045942A (en) * | 2009-08-25 | 2011-03-10 | Koto Engraving Corp | Cutter, anvil roll, and die cut roll |
| EP2388114A1 (en) * | 2010-05-17 | 2011-11-23 | Hunkeler AG | Device for laterally transverse or cutting mobile sheets of material |
| CN102765106A (en) * | 2012-07-31 | 2012-11-07 | 罗华荣 | Processing device and processing technology for protective films with pull tapes |
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| CN114571527A (en) | 2022-06-03 |
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Address after: 201108 the 1 story 1F101 room 2, 2059 metropolitan Road, Minhang District, Shanghai. Applicant after: Shanghai Haobai Zhizao Precision Electronics Co.,Ltd. Address before: 201108 the 1 story 1F101 room 2, 2059 metropolitan Road, Minhang District, Shanghai. Applicant before: HOPINES ELECTRONIC TECHNOLOGY (SHANGHAI) Co.,Ltd. |
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