A kind of anti-sintering, non-sticky furan resin molding sand material and its manufacturing method

A furan resin and anti-sintering technology, which is applied in the manufacture of tools, cores, casting molds, etc., can solve the problems that the molding sand cannot be formed and solidified, cannot prevent the molding sand from sticking to the sand, and cannot form a loose structure in the molding sand, so as to improve labor productivity and greatly Advantages in production cost, easy effect of sand cleaning

Active Publication Date: 2021-02-05
杭州微砂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is a furan resin molding sand material with the functions of anti-sintering and non-sticky sand and its manufacturing method, which solves the problem that the molding sand in the prior art cannot be molded and solidified, and thus the temperature of the molding sand is reduced to Molding sand cannot form a loose structure at room temperature; nor can it prevent the problem of sand sticking

Method used

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  • A kind of anti-sintering, non-sticky furan resin molding sand material and its manufacturing method
  • A kind of anti-sintering, non-sticky furan resin molding sand material and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The manufacturing method of anti-sintering and non-sticky functional sand: first mix chrome ore B and inert sand A evenly, add curing agent 20-60% and mix for 30 seconds to 2 minutes, then add resin 1.2% and mix for 30 seconds to 2 minutes, It can be used for modeling after sanding out.

[0021] A specific mixing process of a manufacturing method that is anti-sintering and non-sticky sand: when the temperature is 20°C and the humidity is 30-50%, the amount of curing agent added can be lowered, which is mainly related to the curing speed. According to the production site The mold size, mold turnover and other factors should be properly adjusted, and the proportion of sand and resin can be kept unchanged. In a high-humidity environment, the curing agent should use the winter model, and the amount of curing agent added is about 30-50%.

Embodiment 2

[0023] A specific mixing process for a manufacturing method that is anti-sintering and non-sticky sand: when the room temperature is 0-10°C and the humidity is 30-50°C, after determining the amount of sand and resin added according to the specific situation, add the amount of curing agent in winter 30-50% control.

Embodiment 3

[0025] A specific mixing process for a manufacturing method that is anti-sintering and sand-free: when the temperature is 30°C and the humidity is 70-90%, after determining the amount of sand and resin added according to the specific situation, the amount of curing agent added in summer is 40%. ~60% control.

[0026] The beneficial effects achieved by the present invention are: the material is easy to solidify and form when the furan resin is used as the binder, the molding sand is calcined at high temperature without sintering and sand sticking, the sand is easy to clean, the labor productivity is greatly improved, and the surface quality of the casting is excellent; Raw materials are abundant and easy to obtain, and the working environment has been greatly improved compared with previous materials. In the same way to manufacture a complex metal part with a high melting point, compared with 3D printing, using this product to manufacture has a greater production cost advantage...

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Abstract

The invention discloses a molding material for casting with anti-sintering and no sand-sticking functions, which comprises 80% of chrome ore sand, 5% of inert sand, 1-1.2% of furan resin and a curing agent accounting for 20-60% of the mass ratio of furan resin , the curing agent is benzenesulfonic acid; the inert sand is surface-treated alkaline ore, and the surface treatment method is to add a layer of neutral organic or inorganic film on the surface of the alkaline ore to form inertness. After calcination, it is cooled to room temperature to become a powder. The material is easy to solidify when using furan resin as a binder. After the molding sand is calcined at high temperature, there is no sintering or chemical sand sticking phenomenon. A substantial improvement over previous materials. In the same way to manufacture a complex metal part with a high melting point, compared with 3D printing, using this product to manufacture has a greater production cost advantage.

Description

technical field [0001] The invention relates to a sintering-resistant and sand-free furan resin molding sand material and a manufacturing method thereof. The material can be normally solidified and molded at room temperature, and forms a loose structure after being calcined by high-temperature molten steel or molten iron, belonging to the field of casting process materials. Background technique [0002] At present, in foundry production, in the treatment of molding sand sintering and sand sticking problems, the existing production technology is only suitable for phenolic resin molding sand after actual use, and when using furan resin as a binder, it cannot be used because it cannot be solidified and molded, and in There is a problem of chemical sticking sand when the coating layer cracks due to thermal expansion. However, in actual production, more than 80% of enterprises use furan resin molding sand, which cannot solve the problems of molding sand sintering and chemical sti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/22B22C1/00
CPCB22C1/00B22C1/224
Inventor 张红专陈涛
Owner 杭州微砂科技有限公司
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