Injection mould device with spray nozzle self-centering device

Abstract

The invention discloses an injection mould with a spray nozzle self-centering device. The injection mould with the spray nozzle self-centering device comprises a fixed mould, a moving mould, a mould line cavity, a flow distribution plate and a spray nozzle device, wherein the spray nozzle self-centering device is arranged at the upper end of the spray nozzle device; the spray nozzle self-centering device comprises a connecting part, a protective ring, and a guide ring part which are arranged outside a spray nozzle main body from the top to the bottom; and the spray nozzle main body is fixed to the bottom surface of the flow distribution plate axially through the connecting part by the protective ring. By rotating the guide ring part forwards or reversely, a first central guide surface and a second central guide surface are matched and then are separated to finish the self-centering of the spray nozzle device and keep the centers of related components aligned. A radial sliding clearance is formed between the protective ring and the connecting part to counteract horizontal movement of the protective ring caused by thermal expansion of the flow distribution plate, wherein the bottom surfaces of the protective ring and the connecting part are in sliding contact, so that the spray nozzle main body cannot be influenced by the thermal expansion and deformation and a centering state is remained.

Description

Technical field [0001] The invention relates to a hot runner injection mold, in particular to an injection mold with an automatic nozzle centering device. Background technique [0002] The current hot runner injection mold includes a fixed mold, a movable mold, and a mold cavity between the movable and fixed molds. A manifold is arranged above the fixed mold, and the manifold is provided to heat the molten resin supplied by the main runner. A resin supply channel that passes through when it reaches a certain temperature; the fixed mold is also provided with a valve nozzle device that selectively supplies the molten resin flowing through the resin supply channel to the mold row cavity, and the valve nozzle device The upper end part is embedded in the bottom surface of the distributor plate and the lower end part is fixed in the fixed mold. The nozzle device includes a nozzle body with a resin channel inside and communicating with the resin supply channel and the mold cavity. A he...

AI Technical Summary

Problems solved by technology

Such a mold structure requires all parts to be assembled sequentially at the installation site of the hot runner injection mold. It takes a long time to align and debug the center of the nozzle and the center of the resin supply channel, and requires a high level of proficiency for workers, so there is time for installation. Disadvantages of length and difficulty in correct installation

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