Cylindrical inner die with outer convex ring

Abstract

The invention discloses a cylindrical inner die with an outer convex ring. The cylindrical inner die with the outer convex ring comprises a central insert, at least five peripheral inserts in abut-against connection with the central insert through first inclined planes, a cylindrical sleeve piece sleeving the peripheral inserts, a dovetail slide groove arranged on one of the peripheral inserts and the central insert, and a dovetail slide rail arranged on the other one of the peripheral inserts and the central insert; the dovetail slide groove and the dovetail slide rail are both parallel to the corresponding first inclined faces. the first inclined planes are obliquely close to the corresponding peripheral inserts in the outward pulling direction of the central insert, and the angles of the first inclined planes of the adjacent peripheral inserts are different; the adjacent peripheral inserts are in abut-against connection through second inclined surfaces, and the second inclined surfaces are obliquely close to or far away from the adjacent peripheral inserts in the outward pulling direction of the central insert; and the cylindrical inner die further comprises a limiting groove which is formed in the cylindrical sleeve piece in a radially concave mode and a limiting piece which is arranged in the limiting groove in a sliding mode in the radial direction and connected with the peripheral inserts. According to the cylindrical inner die with the outer convex ring, lossless demolding of an annular inner inverted buckle can be achieved.

Description

technical field [0001] The invention relates to a cylindrical inner mold with an outer convex ring. Background technique [0002] Injection molds with undercuts are generally demolded in the following two ways: Directly adopt the method of strong demoulding. This demoulding method is relatively simple and convenient, and the cost is low. However, this structure will cause product strain and the product size is not easy to control. ;Using inclined top and slider structure for demoulding, this structure can reduce product strain and control product size, but this inclined top slider structure can only be used for ordinary undercuts, and cannot be used for ring inner undercuts. Contents of the invention [0003] The purpose of the present invention is to provide a cylindrical inner mold with an outer convex ring, which can realize the non-destructive demoulding of the annular inner undercut, has high demoulding efficiency, and can completely avoid product strain. [0004] In...

AI Technical Summary

Problems solved by technology

[0002] Injection molds with undercuts are generally demolded in the following two ways: Directly adopt the method of strong demoulding. This demoulding method is relatively simple and convenient, and the cost is low, but this structure will cause product strain and the product size is not easy to control. ;Using inclined top and slider structure for demoulding, this structure can reduce product strain and also control product size, but this inclined top slider structure can only be used for ordinary undercuts, and cannot be used for ring inner undercuts

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