A method of making a slider for use in a zipper

摘要

A method of making a slider for use in a slide fastener, which slider is provided with bearings (7) for a pull tab (2) on an upper surface of a slider body (1) on its opposite side to pivotably hold a pintle (8) of the pull tab (2). By making use of only one slide core (12), a slider body mold cavity in a mold (10,11) is blocked from a pull tab mold cavity (14) and at the same time, hollow space portions in the bearings for the pull tab are formed by means of the slide core (12). After molding the slider body, by retreating this slide core (12), the hollow space portions in the already molded pull tab bearings are used as a mold portion for a pintle (8) of the pull tab (2). By injecting an amount of molten synthetic resin having a larger thermal contruction coefficient than the synthetic resin used previously for molding the slider body, into the pull tab mold cavity (14), the pintle (8) of the pull tab and the pull tab (2) are integrally molded.