Mechanical forming die improving process

Abstract

The invention provides a mechanical forming die improving process. Firstly, a pressed pattern is manufactured, then a wax die is made through pressing, specifically, a paste wax material is pressed into the pressed pattern with pressure, and the pressed pattern is removed out after the wax material is cooled and solidified; a firm shell is formed by coating the surface of the wax die with a refractory material, a process forming the firm shell mainly comprises coating dipping, gritting and hardening, and the process is conducted in a repeated way so that a hardened refractory shell with the thickness of 8-10 mm can be formed; during gritting, the particle size of sand used at last multiple layers is greater than that of sand used at first and second layers; and a gate of the wax die with the firm shell formed is upwards soaked within water of 90-95 DEG C, so that the wax material is molten and floated on the water surface, or the gate of the shell is downwards placed in an autoclave, and steam of 0-2-0.5 MPa is led to the autoclave, so that the wax material is molten out. By means of the mechanical forming die improving process, the die is precise, a parting surface does not exist,high-melting-point alloys and difficult-to-chip alloys can be poured, and a cavity surface is smooth and clean, therefore, the accuracy and surface quality of a casting are high.

Description

technical field [0001] The invention relates to a process for improving a mechanical mold, which belongs to the technical field of mechanical casting. Background technique [0002] 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 of the part, other easy-to-form materials are used to make the structural shape of the part in advance, and then the mold is placed in the sand mold, so a cavity with the same structural size as the part is formed in the sand mold. Then pour a fluid liquid into the cavity, and after the liquid cools and solidifies, it can form a part exactly the same as the shape and structure of the mold. [0003] The casting mold is driven by a hydraulic cyli...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the general small and medium-sized enterprises adopt the sand casting method for parts with relatively complicated structural shapes. Although the sand casting method can adapt to various parts with complex shapes, the quality of the manufactured products is not good, and the dimensional accuracy is relatively low. Low, there is a parting surface on the product, it is difficult to adapt to the requirements of modern machine manufacturing