Technique device for improving core sand deformability and collapsibility of device

A technical device and concessional technology, which is applied in the direction of cores, casting molding equipment, casting molds, etc., can solve the problems of poor concessionality, heavy repair work, and many crack defects, and achieve the effect of reducing crack defects and reducing the scrap rate

Inactive Publication Date: 2017-08-18
HUSN CASTING ANHUI YINGLIU GROUP
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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

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  • Technique device for improving core sand deformability and collapsibility of device

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[0012] The technical solution of this patent will be described in further detail below in conjunction with specific embodiments.

[0013] See figure 1 , A technical device for enhancing the regressiveness and collapsibility of its core sand, comprising sand core 1, sand core bone 2, sawdust sand 3, wire mesh 4 and core box 5, the outer layer of the sand core is made of aggregate It is combined with the core sand to form a sand core surface layer with a certain strength, and the inner layer is a highly collapsible and highly regressive sand core inner layer made of a mixture of core sand and low ignition point materials in a certain proportion.

[0014] Further, the aggregate in the outer layer of the sand core is a wire mesh woven by metal wires (diameter 0.5mm-1mm), and the size of the mesh is 10X10 (mm).

[0015] Further, the inner layer of the sand core is sawdust sand with a low ignition point.

[0016] Further, the mixing ratio of the sawdust sand and the core sand in the inner ...

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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...

Claims

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Application Information

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IPC IPC(8): B22C9/10B22C7/06
CPCB22C9/103B22C7/06B22C9/106
Inventor 李勇杜应流丁植
Owner HUSN CASTING ANHUI YINGLIU GROUP
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