Die

Abstract

The invention discloses a die, which includes a die body composed of a lower die equipped with a hemispherical cavity internally and an upper die equipped with a hemispherical curve cavity, a heat preservation cavity disposed on the upper die and communicated with the outside, and a heat preservation die body embedded in the heat preservation cavity. The heat preservation cavity is communicated with the hemispherical curve cavity, the inlet of the heat preservation cavity is provided with an annular step slot, and the outer edge of the heat preservation die body is provided with an annular flange matching the annular step slot. One upper end side of the upper die is provided with a pouring gate, which is communicated with the hemispherical curve cavity of the upper die through a channel disposed in the heat preservation die body. Grinding balls poured by the die provided in the invention overcome the shrinkage cavity, porosity and other defects inside the balls, and have substantially improved wear resistance. The installation of a high-melting-point filtration net with fine meshes at a sprue gate of the die can significantly reduce dregs in the poured and molded grinding balls, so that the yield and quality of castings can be enhanced.

Description

technical field [0001] The invention relates to the field of mold casting, in particular to a mold. Background technique [0002] Molds are various molds and tools used in industrial production for injection molding, blow molding, extrusion, die-casting or forging forming, smelting, stamping, stretching and other methods to obtain the required products. In short, a mold is a tool used to shape an object. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the article through the change of the physical state of the formed material. Casting mold refers to the model in order to obtain qualified parts, ordinary manual modeling, commonly used wooden models, plastic models, and metal models for mechanical modeling, such as aluminum models and iron models. Wax models for precision casting and polystyrene models for lost foam. Casting mold means that in order to obtain the structural shape ...

AI Technical Summary

Problems solved by technology

[0003] The grinding balls of the existing casting molds are prone to defects such as shrinkage cavities and porosity inside, which makes the grinding balls prone to early breakage during the working process

At the same time, the shape and position design of the metal mold insulation mold body currently used is unreasonable, failing to meet the expected indicators

Moreover, the existing casting generally pours molten metal directly into the mold cavity, so that the molded castings contain high dross components, the yield is low, and the quality of the castings cannot be guaranteed.

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