Perforating knife

Abstract

The invention discloses a perforating cutter, which can adapt the process requirements of perforating on the comparatively soft material such as honeycomb paper board and corrugated board. The invention comprises a cutter handle and a cutter body arranged on the cutter handle, a cutter tip is arranged at the end part of the cutter body, a cross section of the cutter body is a quadrangle with diagonal lines of different lengths, and the cross section is symmetrical along a short diagonal line, inner and outer included angles of the two ends of the short diagonal line of the quadrangle are not equal, the outer included angle is larger than the inner included angle, the two side surfaces forming the inner included angle of the cutter body are the grinding surfaces, and cutter blades are arranged at the two ends of a long diagonal line of the cutter body. The round hole perforated on the comparatively soft material such as honeycomb paper board and corrugated board through the perforating cutter is smooth without rough selvedge, and the invention completely conforms to the perforating process requirements; the two grinding surface are plane surfaces, and the cutter sharpening is very convenient.

Description

technical field [0001] The invention relates to a punching knife in a punching device for punching honeycomb cardboard, corrugated cardboard, foam material and other materials that are not very hard. Background technique [0002] At present, the punching knife in the punching device used for punching honeycomb paperboard, corrugated cardboard, foam material and other materials that are not very hard in texture usually includes: a knife for clamping in the punching device handle, a knife body is provided on the knife handle, the end of the knife body is a knife point, the cross section of the knife body is circular or oblate, and the knife body is provided with a blade. This kind of punching knife is very effective when punching holes in hard materials, but when punching holes in honeycomb cardboard and corrugated cardboard, the holes punched have many rough edges and the round edges are not smooth; at the same time, this kind of blade is not conducive to sharpening the knife...

AI Technical Summary

Problems solved by technology

This kind of punching knife is very effective when punching holes in hard materials, but when punching holes in honeycomb cardboard and corrugated cardboard, the holes punched have many rough edges and the round edges are not smooth; at the same time, this kind of blade is not conducive to sharpening the knife after it is worn. , because the cutter body is round, the center of the cutter body tends to change during the sharpening process; moreover, if the thickness of the punched material is thick, the hole will be turned outward, which will reduce the accuracy of the hole

In short, the above-mentioned two kinds of punching knives with circular or oblate cross-sections cannot meet the punching process requirements of relatively soft materials such as honeycomb cardboard and corrugated cardboard.

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