an extrusion mold

Abstract

The invention relates to an extrusion forming mold. The extrusion forming mold comprises a mold sleeve; a ladder-shaped inner cavity penetrating a vertical direction is disposed in the mold sleeve; the inner cavity comprises a mold plate cavity, a mold core cavity and an open cavity successively along an axial direction; a mold core is arranged in the mold core cavity; a mold plate is arranged in the mold plate cavity; an outer peripheral surface of the mold plate is sleeved by an elastic ring that elastically contracts and expands in a radial direction; the elastic ring is provided with an inner peripheral surface matching the outer peripheral surface of the mold plate in a flexible support manner and an outer peripheral surface matching with the inner wall of the mold plate cavity in a flexible support manner. With the extrusion forming mold, cracking phenomenon of the mold plate can be prevented and a service life of the mold is prolonged.

Description

technical field

[0001] The invention relates to an extrusion molding die. Background technique

[0002] An existing extrusion molding die for producing nuts, such as Figure 1-3 As shown, it includes mold sleeve 1, and mold sleeve 1 is provided with an inner cavity that runs through the upper and lower directions. The mold core is installed in the cavity, and the mold piece 2 is installed in the mold piece cavity. The outer peripheral surface of the mold piece 2 is an interference fit with the inner wall of the mold piece cavity of the mold sleeve 1. There are corresponding openings on the mold piece 2 and the mold core 3. The mold hole extending along the up and down direction is connected with the mold core hole, and the mold core hole is connected with the mold hole.

[0003] However, the existing extrusion dies have the problems of easy cracking and short service life. The reasons for the above problems are mainly caused by the following two points: 1) The die is made o...

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