Sprue valve needle action device of hot runner injection mold

Abstract

The invention discloses a sprue valve needle action device of a hot runner injection mold. The sprue valve needle action device comprises an upper building block, a lower building block, a nozzle sprue valve needle device and a control part. A single mold core is formed between the upper building block and the lower building block. A plurality of sprues are arranged in the mold core, and nozzles are arranged in the sprues. A time sequence device of the controller controls up and down actions of the nozzle sprue valve needle device according to control signals, and opening and closing of the sprues are controlled in order through the up and down actions of the nozzle sprue valve needle device. By means of the manner, the sprue valve needle action device of the hot runner injection mold opens and closes the multiple sprues in order according to the control signals of the time sequence device, and bad injection forming phenomena such as marks or joint lines cannot occur at the confluence places or fields where fused resin is injected into the mold core in order.

Description

technical field [0001] The present invention relates to the gate valve needle action device of the hot runner injection mold, especially in the single mold core of the hot runner injection mold, there are more than two valve needles, one for each gate, and the valve needle is opened and closed according to the action of the piston. gate valve pin action device. Background technique [0002] According to the image, structure, and size of the molded product, there are many gates in one mold core, and so-called multiple gate hot runner injection molds are used. [0003] Traditionally, in most gate hot runner injection molds, the control department sequentially controls the gate valve needle according to the sequencer set in advance to obtain the gate valve needle control mode. According to such a sequencer gate valve needle control method, the first gate valve needle set at the first first gate is opened, and the molten resin is injected into the mold core. During the filling ...

AI Technical Summary

Problems solved by technology

As a result, through the subsequent second gate valve needle, the subsequent molten resin injected into the mold core is filled with the maximum filling amount at the initial stage of injection, and has been injected into the mold core, and the flowing molten resin that flows ahead merges on the surface. Injection molding defects such as marks or joint lines caused by the surface of the molten resin at the confluence point

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