Injection mold for engine cover plate

Abstract

The invention provides an engine cover plate injection mold which comprises a fixed mold body, a first cavity formed in the fixed mold body and at least one second cavity communicated with the first cavity, a channel is formed in the position, at the bottom of each second cavity, of the fixed mold body, and an insert is slidably connected into each channel in a one-to-one correspondence mode. The outer peripheral wall of the insert is in sliding sealing fit with the inner peripheral wall of the channel; the bottom of the insert is connected with a driving mechanism used for driving the insert to move up and down in a reciprocating mode, when the insert is located at the highest point, the top of the insert fills the second cavity, and when the insert is located at the lowest point, the top of the insert is separated from the second cavity. According to the engine cover plate injection mold, secondary injection molding can be achieved only by using one set of mold to be matched with a common injection molding machine, the cost can be saved, and the injection molding efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of mold design, in particular to an injection mold for an engine cover plate. Background technique [0002] The molding of the automobile engine cover needs to be realized by two injection moldings. The first injection of hard rubber and the second injection of soft rubber can be used for injection molding products. At present, two-color injection molding can be realized by two-color injection molding and overmolding. Two-color injection molding uses a professional two-color injection molding machine and a special two-color injection mold to achieve two-color injection molding. The injection molding machine needs to have the function of rotating the two-color injection mold The two movable mold cavities are exchanged. Overmolding requires the development of two sets of injection molds. During injection molding, the semi-finished product is injected first, and then the semi-finished product is put into anoth...

AI Technical Summary

Problems solved by technology

[0003] For two-color injection molding, it has high requirements for molds and injection molding machines, and requires professional two-color injection molding machines and special two-color molds. The investment in equipment is large, and after the equipment is invested, the injection molding machine is often idle due to low capacity requirements. , resulting in a waste of resources

For overmolding, because it needs to put the semi-finished product produced by the first set of molds into the second set of molds in the form of an insert, it is required that there are not many undercuts or large deformations on the semi-finished product, otherwise it will As a result, the semi-finished product cannot be put into the second set of molds, and the overmolding method is also easy to cause delamination of the injection molded product

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