A safety mechanism to prevent collisions during ejection

Abstract

The invention provides a safety mechanism preventing collision from occurring during an ejection process. The safety mechanism comprises a lower mold plate, a sliding block, an anti-collision needle,and an ejection mechanism. The lower mold plate is fixedly arranged; a mold cavity and a through hole are formed in the lower mold plate; the sliding block can be movably arranged on the lower mold plate; the sliding block can move on the side part of the mold cavity; a limiting hole is formed in the sliding block; the anti-collision needle is arranged in the through hole in a penetrating way; when the sliding block moves to the through hole so as to coincide with the limiting hole, the anti-collision needle penetrates through the limiting hole; and when the anti-collision needle penetrates through the limiting hole, the ejection mechanism ejects a workpiece out of the mold cavity. The safety mechanism preventing collision from occurring during the ejection process provided by the invention has the beneficial effect that the occurrence of the phenomenon that the ejection mechanism forcibly ejects to damage the workpiece when the sliding block is not retreated completely during mold opening is avoided.

Description

technical field [0001] The invention belongs to the technical field of molds, and relates to a safety mechanism for preventing collision during ejection. Background technique [0002] The injection molding process is a high-efficiency and less cutting-free molding process. It is used to produce various parts in modern industry. It has unique technical characteristics and significant economic benefits. The plastic liquid is cooled and solidified under the action of pressure. After the plastic liquid is solidified, the injection mold is opened, the casting is taken out, and an injection molding cycle is completed. [0003] The ejector mechanism is generally installed in the mold. The ejector mechanism can safely eject the injection-molded casting out of the mold, and effectively protect the entire injection-molded part from damage. The existing ejector mechanism is generally an ejector pin and a slider. During the injection molding process, the ejector pin can be ejected only...

AI Technical Summary

Problems solved by technology

[0003] The ejector mechanism is generally installed in the mold. The ejector mechanism can safely eject the injection molded casting out of the mold and effectively protect the injection molded part from damage. The existing ejector mechanism is generally an ejector pin and a slider. During the injection molding process, the ejector pin can be ejected only after the slider needs to be pushed back completely, that is, after the slider needs to move to the right position on both sides, otherwise the ejector pin will collide with the workpiece, thus damaging the workpiece

Images