Side pouring plastic mold with shrinkage cavity demolding

Abstract

The invention discloses a side pouring plastic mold with shrinkage cavity demolding. The side pouring plastic mold with shrinkage cavity demolding comprises a moving mold body and a fixed mold body. The moving mold body comprises a push rod. A sleeve is coaxially arranged on the outer side of the push rod through a base plate. The push rod is sliding connection with the base plate. A plurality ofdriving rods are arranged on the periphery of the push rod. The sleeve is composed of expansion plates and wedge plates alternatively. The number of the expansion plates is the same as that of the wedge plates. One end of each expansion plate is fixedly arranged on the base plate. The wedge plates are movably arranged on the base plate. A plurality of clamping parts are arranged on the inner end face of the base plate. Each clamping part is used for locking the corresponding wedge plate. In the process of mold feeding, the driving rods act on corresponding clamping parts to release corresponding wedge plates. Because of the adopted structure, after mold feeding is completed, clamping between the expansion plates and the wedge plates is tighter, it is difficult for an interval to appear, itis avoided that the sizes of injection molding part holes is unstable, and the defect of surface roughness is avoided.

Description

technical field [0001] The invention relates to a mold, in particular to a side casting plastic mold for shrinkage cavity release. Background technique [0002] Mold, 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 shape an object. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the article through the change of the physical state of the formed material. [0003] Chinese patent CN201520126284.9 discloses a side-casting plastic mold for shrinkage cavity demoulding, including a movable mold and a fixed mold. The movable mold includes a push rod, and a conical sleeve is coaxially arranged on the outside of the push rod. The small opening of the sleeve faces the fixed mold, the diameter of the pu...

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned patent documents, during the mold feeding process, the push rod can push the inner sleeve apart so that it can be embedded in the gap between the outer sleeves. When the inner sleeve completely fills the gap between the outer sleeves, push The rod will stretch the outer and inner sleeves outward at the same time, so that there will be a gap between the outer and inner sleeves, resulting in unstable dimensions and matte defects in injection molded parts

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