An injection mold with two types of three-part gating system

Abstract

The invention relates to the technical field of mold design, in particular to an injection mold with two types of three-part pouring systems. It includes a fixed mold group, a movable mold group matched with the fixed mold group and a gating system for pouring. The fixed mold group is provided with a core inside, and the movable mold group is provided with a cavity matching the core. The pouring system includes a plurality of runners, and a gate is provided at the end of each runner, and the gates communicate with the mold cavity and are located in different positions of the mold cavity, and there are at least two types of the gates. Multiple runners are used to pour at the same time, and multiple gates are used to pour at different positions, which can adapt to the pouring of products with large volume and complex shape, shorten the molding cycle and save production costs.

Description

technical field [0001] The invention relates to the technical field of mold design, in particular to an injection mold with two types of three-part pouring systems. Background technique [0002] Usually, for single-cavity injection molds, products with large and complex shapes are often cast with direct gates, side gates, and latent gates. The direct gate has major defects: 1. It is difficult to remove the gate aggregate; 2. There are obvious gate marks on the plastic part; 3. It is easy to generate internal stress and cause deformation of the plastic part; 4. Melting near the gate The cooling of the body is slow, prolonging the injection molding cycle and affecting the molding efficiency. Although side gates are suitable for molding plastic parts of various shapes, side gates are prone to defects such as weld lines, shrinkage cavities, and air bubbles, which are very unfavorable for the molding of products with appearance requirements. The latent gate can solve this defec...

AI Technical Summary

Problems solved by technology

The direct gate has major defects: 1. It is difficult to remove the gate aggregate; 2. There are obvious gate marks on the plastic part; 3. It is easy to generate internal stress and cause deformation of the plastic part; 4. Melting near the gate The cooling of the body is slow, prolonging the injection molding cycle, affecting molding efficiency, etc.

[0004] In addition, for products with a horizontal cup hole shape, the design of the core-pulling mechanism for the horizontal cup hole is difficult due to the narrow space for core-pulling.

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