JP5517117B2 - Punching blade - Google Patents

Description

  The present invention retains non-adhesiveness at the blade edge when punching and cutting an adhesive film sheet or paper having a pressure-sensitive adhesive layer laminated, and the blade has a good sharpness and a smooth cut surface to reduce dust. Strip-shaped punching blade.

  A sticky film sheet with an adhesive layer laminated with a conventional punching blade. When punching and cutting paper, it is known that the surface of the punching blade is mainly coated with a fluoropolymer on the surface of the punching blade for non-adhesive purposes. It has been.

  For non-adhesive purposes with conventional punching blades, fluororesin coating is applied. In that case, in order to achieve adhesion of the paint to the cutting edge and surface of the punching blade, it is made uneven by shot blasting from above In that case, the tip of the blade edge becomes uneven due to shot blasting powder particles, and the sharpness of the blade is impaired, and the cutting surface becomes rough and uneven due to blast particles, film sheet during punching cutting, The disadvantage is that paper dust is generated.

  In some conventional punching blades, the tip of the blade is not painted, and the tip of the blade is masked and fluororesin is applied without shot blasting. However, it takes time to work and cannot be mass-produced, resulting in poor productivity and high cost. For non-adhesive purposes, the masking width should be in the range of 0.1 mm to 0.5 mm from the tip of the blade. It is difficult to maintain this masking width in the current work that needs to be maintained, and there is a disadvantage that the masking width becomes 0.5 mm to 1.0 mm and the width becomes uneven.

  The conventional punching blade for non-adhesive purposes mentioned above is shot blasted to improve the adhesion of the fluororesin, but the sharpness of the blade is impaired, and the cut surface of the film sheet or paper is rough and uneven. In addition, there is a disadvantage that dust is generated during punching and cutting. The above-described method of masking the tip of the blade has uneven masking width and uneven quality, and has poor productivity and high cost. There are disadvantages to become.

  The present invention is intended to solve the problems of conventional non-adhesive punching blades, and has non-adhesiveness and good sharpness of the blade. An object of the present invention is to provide a punching blade with a low cost and capable of mass production with low productivity of dust.

  In order to achieve the above object, the present invention forms a strip-shaped punching blade. To form the cutting edge of the punching blade, both sides of the cutting edge are polished with a grindstone to form an inclined gradient, in which case the grindstone has a coarse particle size. The surface of the formed blade edge is uneven and the paint adheres to the surface, so that the paint adheres well. There is no need to perform blasting. The tip of the cutting edge is finished to a mirror surface with an ultra-fine grindstone with a grindstone in order to improve the sharpness of the punching blade. A punching blade with a solid lubricant coating, mainly fluororesin coating, on the tip, sloped gradient, surface, and both sides of the punching blade.

  As shown in FIG. 1, the problem-solving means forms an inclined gradient portion of the cutting edge, so that the grindstone has a coarse particle size and is polished in an oblique direction to generate irregularities, resulting in an adhesive effect equivalent to that of shot blasting. The particle size of the grindstone is selected according to the properties of the paint to be coated. The grindstone particle size to be selected is preferably # 60, # 100, # 120, # 240, # 400 in terms of the sandpaper standard particle size.

  As shown in FIG. 2, the problem-solving means is formed in an inclined gradient portion of the cutting edge, and is polished in an oblique direction with the above-mentioned grindstone to cross and generate unevenness, thereby providing even more adhesion than the method described in FIG. This means is applied depending on the nature of the paint, the type of film sheet, paper to be punched and cut.

  As shown in FIG. 3, the tip of the blade of the inclined gradient portion polished with a coarse grain as shown in FIG. In addition, it is possible to provide a punching blade that has a smooth cut surface and generates less dust from film sheets and paper during punching and cutting.

  As shown in FIG. 4, the problem-solving means is coated with a solid lubricant film, mainly fluorocarbon resin on the blade edge, the inclined gradient portion, and the surface polished to form the inclined gradient portion of the blade edge as described above. In order to improve the adhesion of the paint, baking and baking are preferable.

  As described above, the punching blade of the present invention has the same effect as that of shot blasting due to the adhesion of the paint without applying shot blasting during conventional coating, and without damaging the sharpness of the blade. Therefore, it is possible to provide a punching blade having a smooth cut surface of paper and generating less dust during punching and cutting.

  In addition, the tip of the cutting edge is finished to a mirror surface in a thread surface with an ultra-fine polishing grindstone, and when the tip of the cutting edge is eliminated by shot blasting with a conventional non-adhesive punching blade, the tip of the cutting edge is masked. In this case, the masking width becomes uneven, and the productivity is poor. There is a disadvantage that the mirror surface portion of the uniform width can be formed without performing shot blasting, and an inexpensive punching blade is provided.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In FIG. 1, a strip-shaped punching blade that is polished on both sides in an oblique direction with a coarse grindstone in order to form an inclined slope portion of the blade tip for the purpose of producing the same effect as shot blasting due to the adhesion of the paint. It is.

  In FIG. 2, in order to produce an effect equivalent to that of shot blasting due to the adhesion of the paint, a belt-like shape in which the grindstone is coarse and intersects in the diagonal direction on both sides to form a sloped portion of the blade edge. The polishing method shown in FIG. 2 is selected depending on the properties, viscosity, film thickness, and the like of the coating blade.

  In FIG. 3, as shown in FIG. 1 and FIG. 2, the tip of the inclined gradient portion of the blade tip is formed into a thread surface in a width of 0.1 mm to 0.5 mm from the tip of the blade, and both surfaces are ultrafine grinding wheels The mirror surface width is selected according to the thickness of a film sheet, paper, etc. to be punched and cut. The surface roughness of the mirror surface is an average value of RZ of about 0.05 μm. Since it is polished to a mirror surface, it is a strip-shaped punching blade with a sharp cutting edge, a smooth cut surface, and little dust generation on film sheets and papers during punching.

  In FIG. 4, a solid lubricant film, mainly a fluororesin, is applied to the sloped gradient portion, the cutting edge thread surface tip portion, and the surface portion of the punching blade formed by polishing the cutting edge without performing shot blasting. A strip-shaped punching blade that is not masked on the cutting edge and then fired to improve adhesion.

  In FIG. 5, a sticky film sheet, paper, etc., in which an adhesive layer is laminated with a strip-shaped punching blade provided with a solid lubricating film, mainly fluororesin, as described above, is punched and cut. In this state, the cutting edge is bitten and cut into a film sheet, paper, and at that time, friction is generated at the tip of the mirror surface and the coated portion of the mirror surface is peeled off.

  In FIG. 6, the above-mentioned ultra-fine polished blade edge portion is subjected to friction at the blade edge portion as shown in FIG. The mirror surface portion appears, and the tip mirror surface portion of the blade edge has no unevenness equivalent to that of shot blasting, so that the portion is easily peeled off and the object of the present invention is achieved. The inclined gradient portion of the blade edge is polished with a coarse grindstone. For this reason, it is preferable to perform blanking several times as a pretreatment for the method of peeling off the paint on the mirror surface part, which has the same effect as the shot blasting process and maintains the paint adhesion.

  The present invention is a disadvantage of the conventional punching and cutting process in the field of producing a laminated film of an adhesive layer of a liquid crystal panel, a laminated film of an adhesive layer of a solar battery panel, a laminated paper of an adhesive layer, a resin sheet, etc. Can be provided at low cost and can be used conveniently.

It is an expansion perspective view of the punching blade which shows the diagonal direction grinding | polishing of the blade edge | tip of this invention. It is an expansion perspective view of the punching blade which shows cross polishing in the diagonal direction of the blade edge | tip of this invention. It is an expansion perspective view of the punching blade which shows the thread surface-like mirror surface polishing of the front-end | tip of the blade edge | tip of this invention. It is an expansion perspective view which shows the state which coated the punching blade of this invention. It is an expansion perspective view which shows the use condition of the punching blade of FIG. FIG. 6 is an enlarged perspective view of a punching blade showing a state after pretreatment and blanking in FIG. 5.

Explanation of symbols

1, 2, the part where the cutting edge is polished in an oblique direction and the surface is made uneven by cross-polishing in the oblique direction.
3. A part obtained by mirror-polishing the tip of the cutting edge into a thread surface.
4. Surface part of the material of the punching blade.
5. The range of the coating width from the base point of the punching blade coating to the tip of the blade.
6. Adhesive layers such as film sheets and paper.
7. Front side of film sheet, paper, etc.
8. Bottom side of film sheet, paper, etc.

Claims (2)

The inclined slope part of the blade edge is slanted with a coarse grinding stone of # 60, # 100, # 120, # 240, # 400 with sandpaper standard grain size, the both sides of the blade are uneven, and the tip part of the blade edge is thread-like A strip-shaped punching blade that is mirror-polished in the range of 0.1 mm to 0.5 mm and is coated with fluororesin on both sides of the blade. The tip of the blade edge is made uneven by polishing the slanted slope of the blade edge with a rough grindstone of # 60, # 100, # 120, # 240, # 400 with sandpaper standard grain size and crossing diagonally left and right. A strip-shaped punching blade in which the surface of the yarn is mirror-polished in a range of 0.1 mm to 0.5 mm, and fluororesin is coated on both surfaces of the blade.

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