Ejection mechanism of plastic mold

Abstract

The invention discloses an ejection mechanism of a plastic mold. The ejection mechanism of the plastic mold comprises a movable mold, and a fixed mold arranged above the movable mold. A push rod is arranged on the lower end of the movable mold; a first reset rod is perpendicularly arranged on the push rod; a rolling wheel is arranged above the first reset rod; a check block is arranged on one sideof the rolling wheel; a second reset rod is arranged on the other side of the rolling wheels; the check block is arranged on an elastic reset assembly; the elastic reset assembly comprises a positioning seat, installing pins, springs and locking caps; two through holes with internal screw threads are horizontally formed in the check block; the two installing pins penetrate through the through holes and are screwed in an installing slot in the side of the positioning seat; and a spring sleeves on each installing pin between the positioning seat and an inner side of the check block. According to the plastic mold provided by the invention, a reset mechanism can be firstly assembled in the mold, and is less in components, simple in structure, applicable to workpieces with different specifications, easy to process, convenient to operate, reliable in resetting operation, and suitable to be used by the plastic mold.

Description

technical field [0001] The invention relates to the field of plastic processing molds, in particular to an ejection mechanism for plastic molds. Background technique [0002] At present, some plastic products have undercut or side hole structures, in order to make such plastic products have a lateral parting or core-pulling mechanism in the mold. Therefore, in the mold with side parting core pulling, some parting core pulling mechanisms will interfere or conflict with the ejector device when the mold is closed, thus causing damage to the mold. In order to make the plastic mold work normally, it is necessary to design a first reset mechanism on the ejector device of the plastic mold to make the interference or conflict disappear. [0003] However, the general first return mechanism mainly includes two kinds of spring first return mechanism and swing bar first return mechanism. The return spring in the spring first return mechanism has a certain life span and is prone to fai...

AI Technical Summary

Problems solved by technology

The return spring in the spring first return mechanism has a certain life span and is prone to failure, especially when the preload ratio and compression ratio of the spring are unreasonably selected, the return spring will quickly fail due to fatigue, and once it fails, it will lose the function of first return

The pendulum first reset mechanism consists of many parts and must be assembled on the upper and lower sides of the formwork. In order not to crush the mechanism, four support columns should be added to the lower side of the formwork. The mold manufacturing cost is high and the operation is inconvenient.

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