Flash-free slender hole forming mechanism of injection mold

Abstract

The invention discloses a flash-free slender hole forming mechanism of an injection mold, which comprises a template for forming the outer contour of a shell plastic part, a side sliding block for forming an inner cavity on the shell plastic part, and a movable ejector core assembly for forming a slender hole on the shell plastic part, wherein the movable ejector core assembly comprises a movable core and an elastic piece, the movable core is arranged on the template in a sliding mode in the longitudinal direction, the lower end of the movable core penetrates through the template and is used for forming the slender hole, the elastic piece is arranged between the movable core and the template, and the elastic piece forces the movable core to move downwards to enable the movable core to move downwards; and when the injection mold is in a mold closing state, the elastic piece forces the lower end of the movable core to always abut against the upper end face of a side sliding block. The flash-free slender hole forming mechanism has the advantages of a simple structure, convenience in control and high forming quality.

Description

technical field [0001] This application relates to the field of injection molds, in particular to molding mechanisms. Background technique [0002] Such as figure 1 and figure 2 As shown, it is a shell plastic part (100) of an automobile part, the shell plastic part (100) is provided with an inner chamber (101), and the shell plastic part (100) is also provided with a communicating inner chamber The elongated hole (102) of (101), the inner chamber (101) and the elongated hole (102) are used as passages for fluid (which can be gas or liquid) to pass through, so as to realize the function of auto parts. The elongated hole (102) is used to precisely control the flow of fluid, and the molding quality of the elongated hole (102) directly affects the qualification rate of the entire shell plastic part (100). While the elongated hole (102) and the inner chamber (101) are molded with split cores, flashes are likely to occur between the two; the existence of the flash will affect...

AI Technical Summary

Problems solved by technology

While the elongated hole (102) and the inner chamber (101) are molded with split cores, flashes are likely to occur between the two; the existence of the flash will affect the throughput of the fluid, resulting in the elongated hole (102) Decreased control accuracy

In addition, because the burr exists at the intersection of the inner chamber (101) and the elongated hole (102), it is located inside the inner chamber (101), and it is difficult to remove it with a trimming knife or other tools

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