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Casting process method for manufacturing mold core through resin sand

A casting process and technology of resin sand, which is applied in the field of casting process of resin sand cores, can solve problems such as slow curing speed, achieve rapid curing and improve production efficiency

Inactive Publication Date: 2018-03-09
QINGDAO TIANDI CASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this process needs to be heated in time, and the curing speed is slow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] 1) The molten iron is melted, and the measured raw materials are put into the power frequency induction furnace, and heated to melt into molten iron;

[0013] 2) Send the molding sand into the drying furnace for drying, put it into the sand mixer after drying, and add the phenol-based resin and curing agent to the sand mixer for mixing. The curing agent is made of phenol-based polymer Composed of isocyanate and triethylamine, the weight of phenolic resin is 19 times that of triethylamine, the mixed sand is put into the casting model machine, and the molding and core making process is carried out;

[0014] 3) Spraying the core after molding and core making, the paint is mainly water-based paint, and then drying in the dryer;

[0015] 4) The molten iron is poured into the casting core and cooled naturally. After the casting is shaken out, it is shot blasting, surface cleaning, cutting and welding.

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PUM

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Abstract

The invention discloses a casting process method for making a mold core with resin sand, which comprises the following steps: 1) melting molten iron; 2) sending the mold sand into a drying furnace for drying, and putting it into a sand mixer after drying, and Add phenol-based resin and curing agent to the sand mixer for mixing. The curing agent is composed of phenol-based polyisocyanate and triethylamine. The weight of phenol-based resin is 15 to 25 times that of triethylamine. Put the mixed sand 3) Spray the core after molding and core making, the paint is mainly water-based paint, and then dry it in the dryer. The curing agent of the present invention is composed of phenolic polyisocyanate and triethylamine, no external heating is needed in the core making process, and the resin sand can be rapidly solidified under the catalysis of the triethylamine, thereby improving production efficiency.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a casting process method for making a mold core with resin sand. Background technique [0002] Most of the molding and core-making process in the foundry adopts the furan resin sand process. In the furan resin sand process, the binder is furan resin, and the curing agent is p-toluenesulfonic acid. A certain amount of binder and A molding process in which curing agent is dried and hardened. But this process needs to be heated in time, and the curing speed is slow. Contents of the invention [0003] In order to overcome the above-mentioned technical problems existing in the prior art field, the object of the present invention is to provide a casting process method using resin sand to make a core, improve the curing speed and improve the production efficiency. [0004] A kind of casting technique method that the resin sand mold core provided by the present invent...

Claims

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Application Information

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IPC IPC(8): B22C9/10B22C1/22
CPCB22C9/10B22C1/2233B22C1/2273
Inventor 李玉敏
Owner QINGDAO TIANDI CASTING CO LTD