Delayed side core-pulling mechanism of injection mold

Abstract

A delayed side core-pulling mechanism of an injection mold comprises an upper composite plate and a lower composite plate. A mold cavity is formed below the upper composite plate. A through hole is formed in the lower composite plate. The lower composite plate is provided with a mold pin, an upper ejector plate, a lower ejector plate and an ejector. A cushion plate is arranged on the mold pin, and the cushion plate is provided with a mold core and a side core-pulling sliding block. A plastic piece formed in an injection mode is arranged among the mold cavity, the mold core and the side core-pulling sliding block. A convex ring, a groove and a through hole are formed in the side wall of the plastic piece. The delayed side core-pulling mechanism is characterized in that a stop block is arranged below the upper composite plate; an inner slope and a right-angled slot are formed in the inner wall of the stop block; a sliding block spring is arranged in a spring slot which is formed between the mold core and the side core-pulling sliding block; a side pulling slot is formed in the side core-pulling sliding block, a fixing plate is arranged on the outer side of the side pulling slot, an outer slope is formed in the outer wall of the fixing plate, and the outer slope of the fixing plate makes contact with the inner slope of the stop block; a side core-pulling rod is arranged in the side pulling slot, and a baffle is arranged on the side core-pulling rod; a delay spring is arranged in the position, on the left side of the baffle, of the outer wall of the side core-pulling rod; one end of the side core-pulling rod penetrates through the side core-pulling sliding block to be matched with the through hole of the plastic piece; and the other end of the side core-pulling rod penetrates through the fixing plate to be matched with the right-angled slot of the stop block.

Description

technical field [0001] The invention relates to an injection mold, in particular to a core-pulling mechanism on the delayed side of the injection mold. Background technique [0002] After the plastic part is injection-molded by the injection mold, if the side wall of the plastic part is formed with a convex ring, a groove and a through hole at the same time, the prior art usually uses a side core pulling slider to simultaneously extract the convex ring, groove and through hole, while After the plastic part is injection-molded, its tightness against the side core-pulling slider is large, and if it is pulled out at the same time, the plastic part may be deformed or even broken. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the prior art, and provide an injection mold with a simple structure by extracting the convex ring and the groove of the plastic part first, and then extracting the through hole of the plastic pa...

AI Technical Summary

Problems solved by technology

[0002] After the plastic part is injection-molded by the injection mold, if the side wall of the plastic part is formed with a convex ring, a groove and a through hole at the same time, the existing technology usually uses a side core-pulling slider to simultaneously extract the convex ring, groove and through hole, while After the plastic part is injection molded, its tightness against the side core-pulling slider is large. If it is pulled out at the same time, it will easily cause the plastic part to deform or even be broken.

Images