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Low-sulfur curing agent for casting furan resin

A technology of furan resin and curing agent, which is applied in the direction of casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of accelerated hardening speed and low mold strength, and achieve the goals of faster hardening speed, high casting strength and improved pass rate Effect

Active Publication Date: 2017-03-15
SUZHOU XINGYE MATERIALS TECH
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a curing agent for low-sulfur casting furan resin, which solves the problems in the prior art that the hardening speed is accelerated and the strength of the mold is low with the increase in the number of reuses of old sand in the prior art. The strength requirements of castings, improve the yield of steel castings

Method used

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  • Low-sulfur curing agent for casting furan resin
  • Low-sulfur curing agent for casting furan resin

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Put 35 parts by weight of toluene into a four-neck glass reactor with stirring. The temperature is raised to 40°C, and 20 parts by weight of sulfuric acid are added dropwise. After the addition is completed, the temperature is raised to 105°C and reacted at 105-115°C for 8-10 hours. After the reaction is over, 35 parts by weight of salicylic acid or citric acid or oxalic acid, 25 parts by weight of water, and 2 parts by weight of animal glue are added after cooling down 30°C for 30 minutes, and then discharged.

[0028] Control 1: Existing sulfonic acid curing agent GS04, produced by Suzhou Xingye Material Technology Co., Ltd.

[0029] Comparison 2: The existing low-sulfur curing agent 04 is produced by Suzhou Xingye Material Technology Co., Ltd.

[0030] The above-mentioned Examples and Controls 1 and 2 were prepared according to conventional methods to obtain furan resin curing agents, and then furan resin molding sand samples were prepared by the methods required in JB / T 75...

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Abstract

The invention discloses a low-sulfur curing agent for casting furan resin. The low-sulfur curing agent for casting the furan resin comprises the following components in parts by weight: 5-35 parts of sulfuric acid, 0-40 parts of dimethylbenzene, 0-35 parts of methylbenzene, 15-60 parts of organic acid, 0-10 parts of methanol, 0-60 parts of water and 1-5 parts of animal glue. The low-sulfur curing agent for casting the furan resin is relatively low in sulfur content, and technical shortcomings of pores, cracks and sulfurizing of castings and poor surface nodulizing of nodular iron castings are overcome. Particularly, along with increasing of the reusing frequency of used sand, the hardening speed of the curing agent is increased, mould strength is high, and yield of the castings is improved.

Description

Technical field [0001] The invention belongs to the technical field of mechanical casting, in particular to the field of curing agents for furan resin no-bake sands for casting, and in particular to a low-sulfur curing agent for casting no-bake furans in the casting process and a preparation method thereof. Background technique [0002] Self-hardening furan resin sand molding core has the characteristics of high strength, high dimensional accuracy, fast hardening speed, high production efficiency, low production cost, and low labor intensity. It is currently the mainstream production process in my country’s foundry industry; self-hardening furan resin for casting The quality of the curing agent is an important guarantee to support the development of self-setting furan resin sand, and to a certain extent has a decisive effect on the performance of self-setting furan resin sand. [0003] The curing agent for self-hardening furan resin for casting is prepared by using compounds such as...

Claims

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Application Information

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IPC IPC(8): B22C1/22
CPCB22C1/224
Inventor 朱文英王文浩王锦程
Owner SUZHOU XINGYE MATERIALS TECH
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