Wax injection mold for bent needle bar shaft casing

Abstract

The invention discloses a wax injection mold for a bent needle bar shaft casing. Regarding the structure characteristics of a bent needle bar shaft casing part to be injected with wax, a movable mold and a fixed mold which are matched with each other to form a cavity which is in accordance with the bent needle bar shaft casing part to be injected with wax in shape; when wax injection is required, a fixed mold plate and a movable mold plate are closely matched correspondingly, and a draw pin, a first insert block and a second insert block are inserted in sequence; and liquid wax is injected into the cavity formed between the fixed mold and the movable mold through a water gap, the fixed mold is taken off after the liquid wax is cooled and formed, the draw pin, the first insert block and the second insert bloc are drawn out in sequence, two sides of a drawing module is pulled up, an injected wax mold is ejected by an ejector pin from a plurality of grooves of the movable mold plate, so that the mold can be taken out conveniently. The mold is simple in structure and convenient to operate, and can be used for producing a high-precision mold of the bent needle bar shaft casing part.

Description

[0001] technical field [0002] The invention relates to a wax injection mold for a looper shaft shell. [0003] Background technique [0004] The looper shaft housing part is a common part on the sewing machine. Its shape is relatively complicated, and there are many through holes and grooves inside. The traditional machining method to produce parts is complicated in process and low in production efficiency. It needs to be produced by Casting is used to obtain the blank of the part, and then the part is obtained by finishing. Before casting, it is necessary to inject wax to obtain the casting model of the part. It is necessary to design a special wax injection mold to realize it. [0005] Contents of the invention [0006] The object of the present invention is to provide a wax injection mold for a looper shaft housing, so as to obtain a casting model for the looper shaft housing parts. [0007] In order to achieve the above object, the technical scheme adopted in the...

AI Technical Summary

Problems solved by technology

[0004] The looper shaft housing part is a common part on the sewing machine. The process of producing parts by processing is complicated and the production efficiency is low. It is necessary to obtain the rough parts by casting, and then obtain the parts by finishing. Before casting, it is necessary to obtain the casting model of the part through wax injection, which requires special design wax injection mold to achieve

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