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Preparation method for quick-hardening furan resin-sand

A furan resin, rapid hardening technology, used in manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve problems such as unsolved problems, and achieve the effect of accelerating hardening

Inactive Publication Date: 2015-12-09
GANSU KOCEL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There is currently no solution to the above problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0020] Embodiment two: a kind of preparation method of quick hardening furan resin sand, this method is:

[0021] Put 1 ton of silica sand into the sand mixer, add 2 kg of polyvinyl alcohol resin powder with a water absorption rate of 100 times, start the sand mixer to mix evenly, add 40 kg of low water content acidic curing agent with a curing agent pump, and mix for 1 minute , and then add 110 kg of furan resin with a resin pump, and mix for 30 seconds to produce sand.

Embodiment 3

[0022] Embodiment three: a kind of preparation method of quick hardening furan resin sand, this method is:

[0023] Put 1 ton of silica sand into the sand mixer, add 3 kg of polyacrylamide resin powder with a water absorption rate of 200 times, start the sand mixer to mix evenly, add 50 kg of low water content acidic curing agent with a curing agent pump, and mix for 1 minute , and then add 120 kg of furan resin with a resin pump, and mix for 30 seconds to produce sand.

Embodiment 4

[0024] Embodiment four: a kind of preparation method of fast hardening furan resin sand, this method is:

[0025] Put 1 ton of silica sand into the sand mixer, add 1 kg of polyacrylic resin powder with a water absorption rate of 50 times, add 2 kg of polyvinyl alcohol resin powder with a water absorption rate of 100 times, and add 1 kg of polyacrylamide resin powder with a water absorption rate of 100 times. Use the sand mixer to mix evenly, add 50 kg of low water content acidic curing agent with the curing agent pump, mix for 1 minute, then add 120 kg of furan resin with the resin pump, mix for 30 seconds, and the sand can be produced.

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Abstract

The invention relates to a preparation method for furan resin-sand, in particular to a preparation method for quick-hardening furan resin-sand. The quick-hardening furan resin-sand includes, by weight, 100 parts of silica sand, 0.1-0.5 part of super absorbent resin, 0.3-0.5 part of low-water-content acidic hardening agents and 0.8-1.5 parts of furan resin. The preparation method is characterized by comprising the steps of adding the silica sand and the super absorbent resin into a sand mixer, starting the sand mixer to mix the silica sand and the super absorbent resin evenly, adding the low-water-content acidic hardening agents through a hardening agent pump to be mixed evenly and quickly, adding the furan resin through a resin pump to be mixed evenly and quickly, and discharging the sand. The method is simple, part of moisture generated in the hardening reaction can be quickly absorbed, furan resin-sand hardening can be greatly accelerated, and the stripping time can be greatly shortened.

Description

technical field [0001] The invention relates to a preparation method of furan resin sand, in particular to a preparation method of fast hardening furan resin sand. Background technique [0002] Furan resin sand is a common foundry sand, which has the characteristics of easy operation and high strength. Furan resin sand is usually composed of silica sand, furan resin and acid curing agent. When in use, first mix the silica sand with the acidic curing agent, then add furan resin to mix the sand, and discharge the sand into the sand box. The time required from the start of sand mixing to the complete hardening of the sand mold is called the ejection time. [0003] The curing of furan resin is a dehydration polymerization process. As the curing reaction proceeds, more and more water is produced by the reaction. On the one hand, the concentration of reactants is reduced, and the curing speed is reduced. On the other hand, the water accumulated in the sand mold needs a certain ...

Claims

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Application Information

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IPC IPC(8): B22C1/22
Inventor 马文王娟娟
Owner GANSU KOCEL CHEM