Spr Bush

摘要

In order to provide a sprue bush capable of suitably cooling the molten resin material in the raw material resin flow path as a whole, in one embodiment of the present invention, a cooling medium provided around the raw material resin flow path and the raw material resin flow path A sprue bush having a flow path, the width dimension of the material resin flow path gradually increases toward the downstream side end surface of the sprue bush, and the downstream side end surface of the sprue bush serves as a heat transfer surface , Sprue Bush is offered.