Hot sprue bushings for resin molding dies

Abstract

This product is a hot sprue bush used in molds for resin molding, and is a miniaturized sprue bush with a heater heating function, in which the sprue portion (elongated cylindrical portion) extending from the flange portion is shortened to a length of approximately 30 mm. As shown in the reference diagram illustrating the usage state, a heater (particularly a sheathed heater with a small diameter of approximately φ1.8 mm) is attached around the flow path of the molten resin in the sprue portion to maintain the molten state of the injected molten resin, and a thermocouple is positioned to measure the heating temperature by the heater. The short sprue portion is efficiently heated by the heater, improving yield.

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