Engaging element forming device for zipper and engaging element for zipper

Abstract

The invention provides an engaging element forming device for a zipper and an engaging element for the zipper. The engaging element forming device comprises a cutting die, a forming die, a cutting punch slidingly arranged on the upper surface of the cutting die in a contact manner, and a forming punch which is coordinated with the forming die to lift, wherein the cutting punch comprises a main body provided with a first cutter part coordinated with the cutter part of the cutting die at the top end to cut a wire rod for the engaging element. A sliding part which slides relative to the cutting die is arranged on the surface, relative to the cutting die, of the main body in an extending manner from the main body. The sliding part is provided with a second cutter part which protrudes forwards along the sliding direction of the cutting die for forming a concave part on a part of the wire rod for the engaging element. The first cutter part is provided with a first cutter face which is consistent with a part, which forms a head of the engaging element, of the wire rod for the engaging element in shape. The second cutter part is provided with a second cutter face which has a flat inclined face formed in a manner of enabling the protruding cutter to become shorter from top to bottom in length.

Description

technical field [0001] The present invention relates to an engaging element for a slide fastener and an engaging element forming device that are continuously formed by cutting an engaging element wire having a substantially Y-shaped cross section in a cross-sectional direction perpendicular to the longitudinal direction of the engaging element wire. More specifically, The present invention relates to an engaging element and an engaging element forming device for a slide fastener in which an inclined surface is formed at the front end of a surface of an engaging head on which an engaging recess is formed. Background technique [0002] As a method of manufacturing an engaging element for a so-called two-way slide fastener that can be opened and closed in either direction, the following method is known: while intermittently supplying a metal wire having a substantially Y-shaped cross section, using a cutting punch and The cutting die sequentially cuts off an engaging element th...

AI Technical Summary

Problems solved by technology

[0003] In general, for the metal engaging elements of zippers, if the surface of the formed engaging elements is not smooth, not only the tactile feeling is poor, but also the opening and closing operation of the slider is often not smooth.

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