A sand mold self-positioning formwork

Abstract

The invention belongs to the field of sand mold casting, and relates to a sand mold casting die plate, in particular to a self-locating die plate of a sand mold. The self-locating die plate of the sand mold comprises an upper die plate body and a lower die plate body arranged on the lower portion of the upper die plate body. First trapezoidal grooves are formed in the middle of the upper die plate body. Second trapezoidal grooves are formed in the middle of the lower die plate body. The first trapezoidal grooves are the same as the second trapezoidal grooves in size and structure. Upper mold bags protruding upwards are arranged in the middles of the first trapezoidal grooves. Lower mold bags which are recessed downwards and matched with the upper mold bags are arranged in the middles of the second trapezoidal grooves. Each trapezoidal groove is an isosceles trapezoid, and the locating inclination angle of each isosceles trapezoid ranges from 5 degrees to 40 degrees. The self-locating die plate of the sand mold has the beneficial effects of being simple in structure, precise in location, high in practicability, easy to manufacture and the like, the length of the mold thickness is increased after flat parting is transformed into curved surface parting, and the phenomenon of bleeding from parting is reduced.

Description

technical field [0001] The invention belongs to the field of sand casting, and relates to a sand casting template, in particular to a sand mold self-positioning template. Background technique [0002] There are double-sided templates and single-sided templates for horizontal parting templates. They are generally composed of mold bottom plates, patterns, gating system molds, heating elements, positioning elements, etc. The positioning elements generally refer to positioning pins and sleeves. Poor manufacturing accuracy of positioning components or long-term wear can lead to excessive positioning deviation of the upper and lower molds and wrong castings, which can seriously lead to waste products. [0003] In most cases, the parting surface is flat. For single-sided templates, positioning pins and holes are generally used to meet the requirements. The positioning accuracy is getting worse and worse due to the influence of manufacturing methods, precision and wear; double-side...

AI Technical Summary

Problems solved by technology

Poor manufacturing accuracy of positioning components or long-term wear can lead to excessive positioning deviation of the upper and lower molds and wrong castings, which can seriously lead to waste products

[0003] In most cases, the parting surface is flat. For single-sided templates, positioning pins and holes are generally used to meet the requirements. The positioning accuracy is getting worse and worse due to the influence of manufacturing methods, precision and wear; double-sided templates generally do not have positioning pins and holes. , the upper and lower molding is generally carried out at the same time, and the positioning of the upper and lower shapes is generally guaranteed by the accuracy of the molding equipment. With the increase of wear and the collision of the moving vehicle, it may cause wrong shape

Although some templates are divided into curved surfaces, they are designed only because of the need for shape division, not from the perspective of surface positioning, and the positioning effect is not ideal.

Some products have strict requirements on right and wrong type, especially for products that need to be dynamically balanced, such as the differential case of auto parts. The templates mentioned above cannot meet the requirements, especially after the equipment or templates are aging.

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