A method for manufacturing conductive foam die-cut parts without knife printing
Through the bonding of conductive foam and handle film and the use of die-cutting machines, the problems of too thin, low density and poor size of the handle film during the die-cutting process of conductive foam are solved, and an efficient and accurate die-cutting process is achieved.
Patent Information
- Application Number
- CN202311257677.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-27
- Publication Date
- 2025-04-04
AI Technical Summary
During the die-cutting process of conductive foam, there are problems such as poor peeling, low density of conductive foam cannot be applied to the protective film, machine bonding cannot be controlled, and poor size during the die-cutting process.
A method of making conductive foam knife-free one-size-fitting die-cutting parts is adopted, and the first fixture is used to bond the foam and the handle film, and die-cutting is used to ensure the accurate fit and size control of the product.
Machine fit is achieved, production capacity and production speed is improved, labor waste and product size incidence is reduced, and conductive foam is ensured efficient and accurate die cutting.
Smart Images
Figure CN119748840A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of die-cutting, and in particular to a method for manufacturing a conductive foam die-cut piece without knife printing and one-knife cutting. Background Art
[0002] Conductive foam refers to a flame retardant sponge wrapped with conductive cloth, which has good surface conductivity after a series of treatments. It has low density and high volume resistivity, which can reduce the weight of electronic products and improve the carrying and use effect. It is widely used in electronic products such as PDP TVs, LCD monitors, LCD TVs, mobile phones, notebook computers, MP3s, communication cabinets, medical instruments, as well as military and aerospace fields.
[0003] At present, there are the following problems in the conductive foam die-cutting process:
[0004] Problem 1: The product is equipped with a handle film, but the handle film is too thin to be punched on it. This is because the handle film is too thin, which may cause the handle film to be cut through or cut too deep, resulting in poor product peeling;
[0005] Problem 2: The density of the conductive foam on the product is low and the product cannot be attached to the protective film (the film is punched on top. Reason: If the protective film is too heavy, it will be damaged. If the protective film is too light, it will not stick to the foam. The designer has tested different protective films. The weight between 1-3 grams cannot stick to the conductive foam, and above 3 grams will cause the conductive foam to be damaged.
[0006] The production method in the prior art:
[0007] How much width should the foam area product be calculated, e.g. Fig. 9 The total width of the product is 13mm, and the foam area is 8.44mm. When punching, the material of the main material is 3mm on one side. Because the other side is not needed, the foam area is given to 12mm. This is because the integer is convenient for cutting;
[0008] Because continuous punching during the punching process requires the roller at the front of the machine ( Fig.10 ) can be punched continuously with materials. The single roller is 15mm, and the material must be 10mm below the roller, so the handle film needs to be given (13-8.44=4.56mm). The blank area is known to be 4.56mm, so 4.56+6, but in order to prevent the roller from pressing on the product, the product needs to be wider, about 8-10mm. In order to prevent the lamination from being offset, the width of the handle film on the other side of the product needs to be given the same width as the conductive foam, so it is equal to 12+4.56+10=26.56=27mm, and the handle film is given to 27mm
[0009] Stick the handle film on the protective film with a size of 26 mm (such as Figure 5), stick the 12mm foam on the 27mm handle film, and stick it to the edge of the product (such as Fig.11 ), punching, cutting tools (such as Fig.12 ), do not debug the product knife line first, adjust the material belt knife line, first place the knife pad Mylar on the lower plate of the mold, use the material belt knife line to punch through both sides, and place foam neatly on the edges of both sides (such as Fig.14 ), then punch and discharge the waste, discharge the waste, stick the cover film on the product, reel, slice, inspect and ship;
[0010] However, the prior art has the following problems:
[0011] Problem 1: The lamination size cannot be guaranteed during lamination, and the machine lamination size cannot be controlled (the start and stop of the machine lamination will cause the size to be unprepared), resulting in the lamination size being too high, so manual lamination can only be used. Manual lamination is more accurate than machine lamination, but it greatly wastes labor and reduces production speed;
[0012] Question 2: During the punching process, it is impossible to ensure that the material is in size (if the speed is too slow, the production capacity will be reduced; if the speed is too fast, the product will not be straight and the product size will be poor), and the defective rate is too high. Summary of the invention
[0013] The purpose of the present invention is to overcome at least one of the defects of the above-mentioned prior art and to provide a method for manufacturing a conductive foam die-cut piece without knife marking.
[0014] The purpose of the present invention can be achieved by the following technical solutions:
[0015] A method for manufacturing a conductive foam die-cut piece without knife printing comprises the following steps:
[0016] The first jig is placed on the laminating machine, the foam enters from the conductive foam feeding port of the first jig, the handle film with the protective film enters from the handle film discharging port of the first jig, and the foam base paper is discharged to obtain a material strip with the foam and the handle film laminated;
[0017] The second jig is placed on the die-cutting machine to die-cut the material strip, arrange the product frame waste side by side, stick the release film, obtain the conductive foam die-cut piece without knife mark, and reel it up.
[0018] Furthermore, the first jig is divided into two areas, namely, a foam position correction area and a foam and handle film bonding area. Specifically, the foam base paper is discharged from the junction of the foam position correction area at the opening position and the foam and handle film bonding area, and then the handle film is fed from the handle film feeding position to bond the edge of the handle film and the edge of the conductive foam together to ensure that the position of the foam is fixed.
[0019] Furthermore, the groove width of the foam position correction area is smaller than the groove width of the fitting area of the foam and the handle film.
[0020] Furthermore, the groove depth is greater than or equal to the thickness of the foam, the handle film and the protective film combined. For example, if the foam is 1 mm, the handle film is 0.025 mm, and the protective film is 0.06 mm, the groove depth is about 1.1 mm.
[0021] Furthermore, the groove of the first fixture is fluorinated to prevent the foam rubber surface from sticking to the first fixture, and the material of the first fixture is preferably metal aluminum.
[0022] Furthermore, the second fixture is divided into an upper plate and a lower plate that match each other.
[0023] Furthermore, the upper plate is provided with a knife line and a positioning hole; and the lower plate is provided with a positioning pin corresponding to the position of the positioning hole.
[0024] Furthermore, the product outer frame waste includes handle film, foam and release film formed by knife-line die-cutting, and a protective film.
[0025] Furthermore, the upper plate is mounted on the upper plate of the universal mold; and the lower plate is mounted on the lower plate of the universal mold.
[0026] Furthermore, the conductive foam die-cut parts without knife marks include a release film, foam and a handle film in sequence.
[0027] Compared with the prior art, the present invention has the following advantages:
[0028] (1) The present invention changes the laminating method from manual laminating to machine laminating, thereby improving production capacity;
[0029] (2) The present invention changes the laminating method from manual laminating to machine laminating, thereby reducing the time;
[0030] (3) The present invention changes the laminating method from manual laminating to machine laminating, thereby reducing labor costs;
[0031] (4) The present invention changes the punching method from non-fixed punching to fixed punching, thereby reducing the product size defect from 50% to 2%;
[0032] (5) The present invention changes the punching method from non-fixed punching to fixed punching, thereby changing the punching speed and improving the product production capacity; BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 is a front view of the first fixture in the embodiment;
[0034] Figure 2 This is a schematic diagram of the reverse side of the first fixture in the embodiment;
[0035] Figure 3 is a schematic diagram of an upper plate of a second fixture in the embodiment;
[0036] Figure 4 is a schematic diagram of a lower plate of a second fixture in the embodiment;
[0037] Figure 5 This is a schematic diagram of the working process of laminating the protective film and the handle film in the embodiment;
[0038] Figure 6 This is a schematic diagram of the working process of laminating the foam and the handle film in the embodiment;
[0039] Figure 7 This is a schematic diagram of die cutting in the embodiment;
[0040] Figure 8 This is a schematic diagram of the working process of laminating the foam and the release film in the embodiment;
[0041] Fig. 9 It is a schematic diagram of the product in the embodiment;
[0042] Fig.10 It is a schematic diagram of punching work in the prior art;
[0043] Fig.11 It is a schematic diagram of laminating the foam and the handle film in the prior art;
[0044] Fig.12 It is a schematic diagram of an upper plate in the prior art;
[0045] Fig.13 It is a schematic diagram of a lower plate in the prior art;
[0046] Fig.14 It is a schematic diagram of a common upper plate and a lower plate in the prior art;
[0047] As shown in the figure, the numbers are as follows: 1-first jig; 11-foam position correction area; 12-foam and handle film fitting area; 2-second jig; 21-upper plate; 211-positioning hole; 212-conducting wire; 22-lower plate; 221-positioning pin; a-protective film; b-handle film; c-foam; d-foam base paper; e-first jig; f-upper plate; g-lower plate; h-waste handle waste; i-release film; j-jig plate; k-universal mold upper plate; m-universal mold lower plate; a'-drag roller; b'-internal drag roller; c'-cutter; d'-material belt knife line; e'-product knife line; f'-product material belt; g'-knife pad foam; n1-8.44mm; n2-13.00mm. DETAILED DESCRIPTION
[0048] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.
[0049] Example
[0050] A method for manufacturing a conductive foam die-cut piece without knife printing comprises the following steps:
[0051] See Figure 5 , attaching the protective film a to the handle film b and rolling it up to obtain the handle film b attached with the protective film b;
[0052] See Figure 6 , place the first jig e on the laminating machine, the foam c enters from the conductive foam feeding port of the first jig, the handle film with the protective film enters from the handle film discharge port of the first jig, and the foam base paper is discharged to obtain a material strip with the foam and the handle film laminated;
[0053] See Figure 7 , place the second jig on the die-cutting machine, adjust the material according to the die release (if the die tip is on the right, the product next to the edge is on the right, if it is on the left, the product next to the edge is on the left) and then perform punching;
[0054] See Figure 8 , and then discharge the waste, discharge the product frame waste, stick the release film, get the conductive foam without knife mark and one knife cut die-cut parts, and reel them up.
[0055] See Figure 1 , 2 In this embodiment, the first fixture 1 is divided into two areas, namely, a foam position correction area 11 and a foam and handle film bonding area 12. Specifically, the foam base paper is discharged from the junction of the foam position correction area 11 at the opening position and the foam and handle film bonding area 12, and then the handle film is bonded to the edge of the handle film and the edge of the conductive foam from the handle film feeding position to ensure that the position of the foam is fixed.
[0056] See Figure 1 , 2 The groove width of the foam position correction area 11 is smaller than the groove width of the foam and handle film fitting area 12.
[0057] See Figure 1 , 2 The groove depth is greater than or equal to the combined thickness of the foam, handle film and protective film. For example, if the foam is 1mm, the handle film is 0.025mm, and the protective film is 0.06mm, the groove depth is about 1.1mm.
[0058] In this embodiment, the groove of the first fixture is fluorinated to prevent the foam rubber surface from sticking to the first fixture, and the material of the first fixture is preferably metal aluminum.
[0059] See Figure 3 , Figure 4 The second fixture is divided into an upper plate 21 and a lower plate 22 that match each other.
[0060] See Figure 3 , Figure 4 The upper plate 21 is provided with a knife line 212 and a positioning hole 211 ; the lower plate 22 is provided with a positioning pin 221 corresponding to the position of the positioning hole 211 .
[0061] In this embodiment, the product frame waste includes the handle film, the foam and the frame waste formed by the knife line die cutting of the release film, and the protective film.
[0062] In this embodiment, the upper plate is mounted on the upper plate of the universal mold; and the lower plate is mounted on the lower plate of the universal mold.
[0063] In this embodiment, the conductive foam die-cut parts without knife marks include a release film, foam and a handle film in sequence.
[0064] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.
Claims
1. A method for manufacturing conductive foam die-cut parts without knife printing, characterized in that: The steps include: The first jig is placed on the laminating machine, the foam enters from the conductive foam feeding port of the first jig, the handle film with the protective film enters from the handle film discharging port of the first jig, and the foam base paper is discharged to obtain a material strip with the foam and the handle film laminated; Place the second jig on the die-cutting machine, die-cut the material strip, arrange the product frame waste side by side, stick the release film, obtain the conductive foam die-cut piece without knife mark, and reel it up.
2. The method for manufacturing a conductive foam die-cut piece without knife stamping according to claim 1, characterized in that: The first fixture (1) is divided into two areas, namely a foam position correction area (11) and a foam and handle film bonding area (12).
3. The method for manufacturing a conductive foam die-cut piece without knife stamping according to claim 2, characterized in that: The groove width of the foam position correction area (11) is smaller than the groove width of the foam and handle film bonding area (12).
4. The method for manufacturing a conductive foam die-cut piece without knife stamping according to claim 3, characterized in that: The groove depth is greater than or equal to the superimposed thickness of the foam, the handle film and the protective film.
5. The method for manufacturing a conductive foam die-cut piece without knife stamping according to claim 3, characterized in that: The groove of the first fixture is fluorinated.
6. The method for manufacturing a conductive foam die-cut piece without knife stamping according to claim 1, characterized in that: The second fixture is divided into an upper plate (21) and a lower plate (22) that match each other.
7. The method for manufacturing a conductive foam die-cut piece without knife stamping according to claim 6, characterized in that: The upper plate (21) is provided with a knife line (212) and a positioning hole (211); and the lower plate (22) is provided with a positioning pin (221) corresponding to the position of the positioning hole (211).
8. The method for manufacturing a conductive foam die-cut piece without knife stamping according to claim 7, characterized in that: The product outer frame waste includes handle film, foam and release film formed by knife line die cutting, and protective film.
9. The method for manufacturing a conductive foam die-cut piece without knife stamping according to claim 6, characterized in that: The upper plate is mounted on the upper plate of the universal mold; and the lower plate is mounted on the lower plate of the universal mold.
10. The method for manufacturing a conductive foam die-cut piece without knife stamping according to claim 1, characterized in that: The conductive foam die-cut parts without knife printing and one-knife cutting include a release film, foam and a handle film in sequence.