Lost foam casting method of central lock body for container

Abstract

The invention discloses a lost foam casting method of a central lock body for a container. The method comprises the following steps: 1, preparing blanks with the shape of a cast from a foam material; 2, constituting the blanks into a blank cluster; 3, putting the blank cluster in a sandbox; 4, carrying out vibration molding with binder-free dry sand; 5, utilizing a vacuum negative pressure to make the dry sand in a filling cavity have enough strength; 6, smelting-casting; 7, removing the cast from molding sand without retained strength; 8, normalizing; and 9, shot-blasting to obtain a finished product In the invention, the foam foaming capacity can be intensively processed through a vacuum system, the cast can be easily removed from the sandbox, the molding sand can be reused, many links in the production process are suitable for the mechanical production, the paint dosage can be controlled according to cases of a product, and the total production cost can be reduced.

Description

[0001] technical field [0002] The invention relates to a casting method, in particular to a lost foam casting method of an intermediate lock body for a container. Background technique [0003] The intermediate lock for the container is made of cast steel, and the existing processing method has always been the investment casting process. The production process of the investment casting process is shown in figure 1 , The feature of this process is to use the principle of heating and melting wax to make a wax mold first, then make a sand shell mold, then remelt the wax to obtain a cavity, and then roast and pour to obtain a casting. It can be seen from the process that investment casting has many and complicated procedures, is not suitable for mechanized production, has high labor intensity in mold making, low production efficiency, pollutes the environment, dry sand cannot be reused, and needs to be roasted to consume fuel. Waste, high production cost, and the shell mold ...

AI Technical Summary

Problems solved by technology

It can be seen from the process that investment casting has many and complex procedures, is not suitable for mechanized production, has high labor intensity in mold making, low production efficiency, pollutes the environment, dry sand cannot be reused, and needs to be roasted to consume fuel. Waste, high production cost, and the shell mold is prone to defects. During pouring, it will run out of fire, impurities are easy to mix, the roasting temperature is difficult to control, the shell mold is often artificially damaged, manual pouring is labor-intensive, and the safety factor is low. The high residual strength of the shell mold requires a special shell removal process, etc.

The main reason for the unfavorable process is that the shell needs to be repeated to achieve a sufficient thickness to withstand the high temperature and pouring impact during the pouring process, and the shell mold must be roasted, etc.

Images