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Foamed plastic binder for lost form casting and method for preparing binder

A technology of lost foam casting and foam plastics, applied in the direction of adhesives, adhesive types, rosin adhesives, etc., can solve the problems of low cohesion, large usage, high gas generation, etc. Low, reduce the effect of gas production

Inactive Publication Date: 2014-01-08
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a foam plastic binder for lost foam casting, which solves the problems of high gas generation, many residues after combustion, low cohesiveness and large usage in the existing binder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 62.4% of methanol or ethanol, 12.3% of polyvinyl butyral resin PVB, 12.5% ​​of phenolic resin, 12.5% ​​of rosin and 0.3% of surfactant JFC according to the mass percentage, the total content of the above components is 100% . and methanol, polyvinyl butyral resin PVB, phenolic resin, rosin and surfactant JFC are mixed together, fully stirred evenly, and the foamed plastic binder for lost foam casting of the present invention is obtained.

Embodiment 2

[0038] Weigh 64.8% of methanol or ethanol, 12.1% of polyvinyl butyral resin PVB, 11.6% of phenolic resin, 11.2% of rosin and 0.3% of surfactant OP according to mass percentage, the total content of the above components is 100% . And methanol, polyvinyl butyral resin PVB, phenolic resin, rosin and surfactant OP are mixed together, fully stirred evenly, and the foamed plastic binder for lost foam casting of the present invention is obtained.

Embodiment 3

[0040] Weigh 66.4% of methanol or ethanol, 11.1% of polyvinyl butyral resin PVB, 11.2% of phenolic resin, 11.1% of rosin and 0.2% of surface active agent according to the mass percentage. The total content of the above components is 100%. . And methanol, polyvinyl butyral resin PVB, phenolic resin, rosin and surfactant are mixed together, fully stirred evenly, and the foamed plastic adhesive for lost foam casting of the present invention is obtained.

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PUM

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Abstract

The invention discloses a foamed plastic binder for lost form casting and a method for preparing the binder. The foamed plastic binder for lost form casting comprises, by mass, 62.4% to 66.4% of methanol or ethanol, 11.1% to 12.5% of polyvinyl butyral (PVB), 11.1% to 12.5% of phenolic resins, 11.1% to 12.5% of rosin and 0.12% to 0.44% of surface active agents, wherein the total content of the constituents is 100%. The invention further discloses a method for preparing the foamed plastic binder, the weighed methanol or ethanol, the PVB, the phenolic resins, the rosin and the surface active agents are mixed to be stirred fully and evenly. The binder is rapid in bonding speed, the strength is high, and defects that the gas evolution is high, the residues are many after burning, the bonding capability is weak, and the usage amount is large of prior binders are overcome.

Description

technical field [0001] The invention belongs to the technical field of lost foam casting, and in particular relates to a foamed plastic binder for lost foam casting, and also relates to a preparation method of the foamed plastic binder for lost foam casting. Background technique [0002] The preparation of foam plastic molds for lost foam casting is one of the important processes in lost foam casting. However, if the binder is not properly selected during pattern preparation, such as applying too much or too little binder, it will not only affect the efficiency of mold making, but also increase the amount of gas generated during pouring and residues after combustion, as well as the combination of various parts of the pattern. Defective, resulting in dents or burr defects on the surface of the casting. In order to obtain high-quality castings, not only the plastic mold is required to be completely gasified without leaving residue during the molten metal pouring process, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J161/06C09J129/14C09J193/04
Inventor 屈银虎梁涛王凤刘新峰
Owner XI'AN POLYTECHNIC UNIVERSITY
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