Two-time internal pulling device of injection mold with clamp type fixing mechanism

Abstract

The invention relates to a two-time internal pulling device of an injection mold with a clamp type fixing mechanism, which comprises a movable mold plate, wherein a barrel is mounted on the movable mold plate; the inside of the barrel is provided with a guiding I-shaped block capable of sliding along the inner wall of the barrel, a rotation stop block and a slide rail; the rotation stop block is fixed with the end part of the slide rail; the guiding I-shaped block, a connection block, a guide slide block and an eight-slide-block mechanism are sequentially connected; first-time internal pulling is realized through the I-shaped cooperation between the guide slide block and the eight-slide-block mechanism, second-time internal pulling is realized through the I-shaped cooperation between an I-shaped slide block and an internal pulling block, and core pulling is finally performed; and a connection rod is fixed by the rotation stop block through a connection rod clamp plate. The technical scheme is characterized in that core pulling and two-time inverted internal pulling prior to core pulling can be realized by one cylinder. Compared with the prior art, the structure is obviously simple, the mold manufacturing cost is low, no pause exists between core pulling and two-time internal pulling, the production cycle of pipe fittings is shortened, and the production efficiency is improved. The connection rod is fixed by the rotation stop block through the connection rod clamp plate, thereby achieving better fixing effect.

Description

[0001] The present invention is a divisional application with the application number 201110313653.1, the application date is October 14, 2011, and the invention name is "Secondary Internal Drawing Mechanism for Injection Mold". technical field [0002] The invention relates to a secondary internal drawing device with a clamping type fixing mechanism of an injection mold, which belongs to the technical field of molds. Background technique [0003] like Figure 16 , 17 The pipe fittings shown have ring-shaped undercuts 20 for sealing rings and block-shaped undercuts 30 for snap-in positioning at the joints. This kind of pipe fittings cannot be directly core-pulled due to the existence of undercuts after injection molding , demoulding. At present, the commonly used processing method is to perform two internal pumping before the core is pulled. Each internal pumping is driven by an oil cylinder. In addition, an additional oil cylinder is required to extract the core, so the cor...

AI Technical Summary

Problems solved by technology

[0003] like Figure 16 , 17 The pipe fittings shown have ring-shaped undercuts 20 for sealing rings and block-shaped undercuts 30 for snap-in positioning at the joints. This kind of pipe fittings cannot be directly core-pulled due to the existence of undercuts after injection molding , demoulding

At present, the commonly used processing method is to perform two internal pumps before the core is pulled. Each internal pump is driven by an oil cylinder. In addition, an additional oil cylinder is required to extract the core, so the core pull mechanism needs at least 3 oil cylinders. Not only is the structure complex and the mold manufacturing cost is high, but also because it takes a certain time gap for each cylinder to switch to the next cylinder after the stroke is completed, the cycle of injection molding products with this mold is long and the production efficiency is low

Images