Feeding improved type injection mold

Abstract

The invention discloses a feeding improved type injection mold. By means of sealing films disposed on the inner wall of a sprue bush, it is avoided that a nozzle of an injection molding machine takesout a molten raw material when being pulled out, and it can also be avoided that impurities enter a chamber of the mold. The feeding improved type injection mold of the technical scheme is characterized by comprising a pouring system, a forming system and a base, the pouring system comprises a sprue and a runner, the sprue bush is disposed at the upper end of the sprue, at least one sealing film is disposed on the inner wall of the sprue bush, the outer ends of the sealing films and the inner wall of the sprue bush are integrated, and the sealing films are made of a material with ductility andresilience. By means of the feeding improved type injection mold, it can be avoided by the sealing films disposed on the inner wall of the sprue bush that the nozzle of the injection molding machinetakes out molten plastic or rubber when being pulled out, the sprue or an external environment is prevented from being contaminated, it can also be avoided that impurities enter the chamber of the mold, and the precision and purity of injection molding products are ensured.

Description

technical field [0001] The invention relates to the field of mold design and manufacture, in particular to a feed-improved injection mold. Background technique [0002] Injection molding is a method of producing shapes for industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding is to make thermoplastic or thermosetting materials into plastic products of various shapes using plastic molding molds. Injection molding is realized through injection molding machines and molds. [0003] Molds are various molds and tools used in industrial production for injection molding, blow molding, extrusion, die-casting or forging forming, smelting, stamping and other methods to obtain the required products. In short, a mold is a tool used to make shaped objects. Injection molds are widely used in the compression molding or injection molding of engineering plastics, rubber, ceramics and other products. Injection molds have specific c...

AI Technical Summary

Problems solved by technology

[0006] 1. When using an injection molding machine to inject molten plastic or rubber into the mold, it is necessary to insert the nozzle of the injection molding machine into the gate of the mold, and then pull out the nozzle after pouring is completed, but part of the molten plastic will often remain when the nozzle is pulled out Or rubber, the residual molten plastic or rubber drips at the gate or other positions and solidifies and is difficult to clean up, causing equipment pollution problems

[0007] 2. Since the gate of the mold is not sealed, when the mold is not in use, dust or particles in the air may fall into the cavity of the mold through the gate, resulting in impurities in the injection molded product and affecting the accuracy of the injection molded product

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