Mold core for molding plastic pipe

Abstract

The invention discloses a mold core for molding a plastic pipe. The mold core comprises a fixed mold core and a movable mold core; a semicircular molding groove is formed in the fixed mold core; a demolding relief groove is formed in each of two ends of the semicircular molding groove; the bottom position of the demolding relief groove is higher than that of the semicircular molding groove; the fixed mold core is provided with an injection molding runner located at one side of the semicircular molding groove; the movable mold core is provided with an upper molding groove matched with the semicircular molding groove in the fixed mold core; a demolding guide groove opposite to the demolding relief groove is formed in each of two ends of the upper molding groove; the upper molding groove and the semicircular molding groove jointly form a circular molding cavity; and the demolding guide groove and the demolding relief groove form a circular demolding channel. The mold core has the advantage of reasonable and compact structure and can be used for limiting the flow direction of a raw material molten solution, avoiding the turbulent flow of the raw material molten solution, reducing burrs of products, saving materials, reducing the cost, making the rejection rate of the molded products low and guaranteeing the quality of each of the products.

Description

Technical field [0001] The invention relates to an injection molding mold, in particular to a mold core for forming plastic materials. Background technique [0002] At present, injection molds for plastic pipes are generally only convenient for forming pipes with the same pipe diameter. The molded product has a single shape and limited processing. There are also molds designed to mold pipes with different pipe diameters. Such molds are used for injection molding. During the molding process, it is easy for the raw material melt to enter the demolding channel to form a turbulent flow, resulting in more burrs in the product, and trimming the burrs requires a lot of manpower and material resources, and also increases the amount of consumables for the molded product, resulting in production costs The increase in burrs increases the difficulty of demolding, and it is easy to deform the molded product during the demolding process, and the rejection rate is higher. Summary of the invent...

AI Technical Summary

Problems solved by technology

[0002] At present, injection molds for plastic pipes are generally only convenient for forming pipes with the same pipe diameter. During the molding process, it is easy for the raw material melt to enter the demoulding channel to form a turbulent flow, resulting in more burrs on the product. It requires a lot of manpower and material resources to trim the burrs, and it also increases the amount of consumables for the molded product, resulting in production costs. The increase of burrs, too many burrs, increase the difficulty of demoulding, it is easy to deform the molded product during the demoulding process, and the scrap rate is high

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