Technique device for improving core sand deformability and collapsibility of device

Abstract

The invention discloses a technique device for improving the core sand deformability and collapsibility of the device. Through the method, the deformability of sodium silicate core sand can be greatly improved, the collapsibility of the sodium silicate core sand is greatly improved, by widely applying the technology, cracks of castings are reduced by 90% or above compared with cracks formed originally, meanwhile, due to the fact that the collapsibility of the core sand is improved, the sand cleaning labor intensity of workers for the same casting is reduced by 90%, and the working efficiency is greatly improved. Through the technique device, the crack defects of castings is greatly reduced, the rejection rate is lowered, sand cleaning is easy due to the good collapsibility, the production cycle is shortened, and thus the manufacturing cost is lowered.

Description

technical field [0001] The technology of the invention mainly relates to the core-making process of casting sodium silicate sand, in particular to a technical device for enhancing the yield and collapse of the core sand. Background technique [0002] Now commonly used sodium silicate sand core-making process, due to the phase change expansion of quartz, the yield of the sand core wrapped in the casting is extremely poor, resulting in more cracks and defects in the casting, and the heavy workload of rework will cause the casting to be scrapped. At the same time, water glass sand is very easy to sinter at high temperature, which causes great difficulties for casting sand, which greatly increases the cost of castings. Contents of the invention [0003] The object of the present invention is to provide a technical device that enhances the retreat and collapse of the core sand, so as to solve the problems raised in the above-mentioned background technology. [0004] To achieve...

AI Technical Summary

Problems solved by technology

[0002] Now commonly used sodium silicate sand core-making process, due to the phase change expansion of quartz, the sand core wrapped in the casting has extremely poor yield, resulting in more crack defects in the casting, and the lighter ones have a large amount of repair work, and the heavy ones lead to the scrapping of the castings. At the same time, water glass sand is very easy to sinter at high temperature, which causes great difficulties for casting sand, which greatly increases the cost of castings

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