Injection molding device for molding plastic grinding tool

Abstract

The invention relates to the technical field of casting molds, and discloses an injection molding device for molding a plastic grinding tool. Circular through holes are formed in the two sides of the outer surface of a discharging pipe, and a flow limiting device is fixedly mounted at one end of each circular through hole. In the material pushing process of a material pushing device, molten plastic in a discharging pipe flows into the mold, at the moment, the pressure intensity in the flow limiting device is small, and when the flow limiting device completely corresponds to a high-pressure discharging hole through an outflow hole, the thrust borne by a stroke plate and the elastic force of a flow limiting spring are mutually balanced, so that an outflow pipe moves until the outflow pipe is completely located in the high-pressure discharge hole, the molten plastic cannot flow out of the outflow hole, the molten plastic can only flow into a mold through the discharge pipe, therefore it is guaranteed that sufficient plastic enters the mold, and the problem that bubbles appear in finished products or the finished products are not formed due to insufficient feeding is avoided, and the feeding stability of the device is improved.

Description

technical field [0001] The invention relates to the technical field of casting moulds, in particular to an injection molding device for molding plastic abrasive molds. Background technique [0002] In the production process of plastic products, it is necessary to use an injection molding machine for one-time molding of plastics. The injection molding machine melts the plastic particles by heating them, and then pushes the melted plastic into the mold with a pusher device, so that the melted The plastic can be molded directly in the mold under the state, and the plastic in the molten state can be solidified by means of cooling, so as to realize demoulding. This is the most widely used injection molding machine structure at present. It has simple structure, convenient use, and high degree of automation. High and stable operation, low failure rate and other advantages. [0003] The injection molding machine of this traditional structure still has certain limitations in the pro...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the use of the existing injection molding device for plastic abrasive molding proposed in the background technology, the present invention provides an injection molding device for plastic abrasive molding. The advantage of adjusting the stroke distance of the traditional equipment solves the problem of complicated operation caused by adjusting the stroke distance of the pusher device after changing the abrasive tool.

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