Forming Die for Plum Blossom Joint Rubber Needle

Abstract

The invention provides a molding mold of a plum blossom-shaped united-row-type plastic pin. The molding mold comprises an upper fixing plate, a front mold, a rear mold, a support plate, a material pushing plate and a lower fixing plate. The molding mold is characterized in that the front mold is fixed to the upper fixing plate, the front mold and the rear mold are closed and form a plum blossom-shaped cavity, the support plate is arranged between the material pushing plate and the rear mold, the material pushing plate is connected to two mold feet, the lower fixing plate is fixedly connected to the two mold feet and a rear mold middle plate, an upper ejector plate is fixed to the rear mold middle plate by bolts, the rear mold middle plate and the upper ejector plate are located between the two mold feet, a return pin is fixedly connected to the rear mold middle plate, the return pin goes through the upper ejector plate and is connected to the rear mold, the outer side of the rear mold is fixedly connected to a limiting block by bolts, the outer side of the front mold is fixedly connected to a T-type limiting guide rail by bolts, and in mold operation, the limiting block can vertically move along the limiting guide rail. Through the structure of the molding mold, ejection motion is smooth. The molding mold provides an energy saving and reliable ejection method.

Description

technical field [0001] The invention relates to a plastic molding die, in particular to a plum blossom-shaped rubber needle molding die. Background technique [0002] With the increasing development of the commodity economy, hang tags are more and more commonly used, and the hang tags are fixed on the commodity through rubber needles as the connecting body, so the demand for rubber needles increases accordingly. The plum-blossom head of the plum-shaped rubber needle is complex in shape, and the rubber needle is slender. The diameter of the middle strip of the rubber needle is about Φ0.5mm, so it is difficult to form. As we all know, when the wall thickness of the plastic part is too small, the pressure loss during injection will be large, the flow length ratio will be small, and the plastic will harden prematurely, which will cause the defect of insufficient filling of the plastic part. Therefore, there are higher requirements for the structural design of the mold. Conten...

AI Technical Summary

Problems solved by technology

The plum-blossom head of the plum-shaped rubber needle is complex in shape, and the rubber needle is slender. The diameter of the middle strip of the rubber needle is about Φ0.5mm, so it is difficult to form.

As we all know, when the wall thickness of the plastic part is too small, the pressure loss during injection is large, the flow length ratio is small, and the plastic hardens prematurely, which will cause the defect of insufficient filling of the plastic part

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