Flared pipe fittings injection mold core pulling mechanism

Abstract

The invention discloses a core-pulling mechanism of an injection mould for a flaring pipe fitting. A plurality of large slide blocks and a plurality of small slide blocks are crossly arranged at the head of an octahedron; the large slide blocks and the small slide blocks are mutually combined and matched with a flaring hole of the flaring pipe fitting; the large slide blocks and the small slide blocks are all arranged in a mounting seat; a cavity allowing the large slide blocks and the small slide blocks to shrink is formed in the mounting seat; a connecting rod glidingly penetrates the octahedron; one end of the connecting rod is connected with a slide block core; the slide block core is matched with an inner wall of the flaring pipe fitting; the large slide blocks and the small slide blocks are glidingly connected with the octahedron respectively; large oblique slide grooves matched with the large slide blocks and small oblique slide grooves matched with the small slide blocks are formed in the octahedron respectively; oblique angles of the small oblique slide grooves are larger than those of the large oblique slide grooves; a drive mechanism used for driving the octahedron and the connecting rod to move backwards in sequence is arranged on a fixed seat. The core-pulling mechanism of the injection mould for the flaring pipe fitting is unlikely to cause a phenomenon of abrasion of the small slide blocks and the large slide blocks, and effectively prevents a phenomenon of material spilling.

Description

technical field [0001] The invention relates to the field of moulds, more specifically, it relates to a core-pulling mechanism for injection molds of flaring pipe fittings. Background technique [0002] Plastic molds are used to produce plastic products, such as plastic pipe fittings, especially flared pipe fittings. When demoulding, the flared pipe body needs to be core-pulled and demoulded, and then the flared pipe body can be ejected out of the mold by the mold ejector mechanism. The flaring part of the traditional flaring pipe fitting mold generally adopts a strong release structure. Although the strong release structure is simple and the processing cost is low, the flared pipe fitting is easy to be strained during core pulling, causing the product to be scrapped. [0003] The Chinese patent with the application number: 201110172254.8 discloses a core-pulling mechanism for injection molds of 1. flaring pipe fittings, including a fixed mold seat plate (1) and a movable mo...

AI Technical Summary

Problems solved by technology

[0006] 1. The sliding of the octahedron is realized by the clamping pin, and every time the mold is opened and closed, the clamping pin will be subjected to a large lateral force (the octahedron moves to the clamping pin) For a long time, the bending pin of the clamping mold is easy to wear and break, which affects the service life of the mold

[0007] 2. The small flared slider is pressed by the large flared slider to achieve simultaneous sliding and contraction. With such a setting, the gap between the small flared slider and the large flared slider is easy to wear, and the material will overflow into the worn part. parts, there is a phenomenon of flying materials, which affects the quality of the product

[0008] 3. The core-pulling mechanism is only suitable for large-diameter pipe fittings. If it is applied to small-diameter pipe fittings, the small slider shrinks inward when pulling the core. Due to the limited installation space, the small slider shrinks inward. During the process, it will touch the connecting rod and cannot be retracted, so that the large slider cannot be retracted, which will cause the large slider to be unable to disengage smoothly from the flared mouth

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