Switching embedding part for semi-thermal-runner injection molding die

Abstract

The invention discloses a switching embedding part for a semi-thermal-runner injection molding die. The switching embedding part comprises an inner runner embedding part and an outer runner embedding part which are arranged between a jet nozzle of the injection molding die and a cold runner gate, wherein a jet nozzle sleeve is arranged at the outside of the jet nozzle; the jet nozzle sleeve and the inner runner embedding part closely cling to the jet nozzle; the jet nozzle sleeve and the outer runner embedding part are correspondingly fixed to a fixed die supporting plate and a fixed die plate of the injection molding die; the jet nozzle sleeve and the inner runner embedding part are connected through a screw. According to the switching embedding part for the semi-thermal-rubber injection molding die, the structure of a part where the thermal jet nozzle is connected with a cold runner is reasonably changed, so that the cold runner can be conveniently processed and maintained, and the jet nozzle can be prevented from being blocked, and as a result, a semi-thermal-runner system is stable in performance, and the product quality is high.

Description

technical field [0001] The invention relates to the technical field of injection molds, in particular to a conversion insert for semi-hot runner injection molds. Background technique [0002] Different from the complete hot runner mold, the semi-hot runner mold is only equipped with a heating device and a temperature control device at the hot runner manifold, so its structure is relatively simple, the failure rate of the hot nozzle is low, the injection cycle is short and a large amount of material is saved. The physical properties of its molded products are also good, and it can control the poor molding problems such as weld lines, so it has been widely used in production. However, after the high-temperature molten material of the semi-hot runner mold flows out of the hot nozzle, it needs to pass through the cold runner and the gate to enter the product cavity. Excessive temperature difference can easily lead to blockage at the junction of hot nozzle and cold runner, resul...

AI Technical Summary

Problems solved by technology

Excessive temperature difference can easily lead to blockage at the junction of hot nozzle and cold runner, resulting in product molding defects or nozzle damage

In addition, the structure of the hot runner nozzle is relatively complicated, and it is difficult to open the cold runner near the hot nozzle and to remove the condensate, which undoubtedly increases the manufacturing cost of the mold

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