Method for preparing novel casting composite binder

Abstract

The invention relates to the technical field of composite binders and particularly relates to a method for preparing a novel casting composite binder. The method comprises the following steps of: (1) mixing and stirring 20-40 parts (by weight) of epoxy resin, 10-20 parts (by weight) of fatty acid ester and 30-50 parts (by weight) of water, heating up to the temperature of 80-90 DEG C, and carrying out heat preservation for 1-2 hours; and (2) adding 5-10 parts (by weight) of hydrochloric acid and 10-20 parts (by weight) of methanol to the mixture obtained in the step (1), uniformly stirring, cooling down to the temperature of 50-70 DEG C, and carrying out heat preservation for 0.5-1 hours. The product of the method is excellent in performance, high in dry tensile strength and can be universally used in a manner of replacing compound fatty oil in the prior art; firstly, after wet core sand using the product is released, in the process of drying and moving, a geometric switch does not change, and the yield of cores can be increased to 98% compared with that of the prior art; secondly, the core drying temperature is low, the roasting time is short, energy sources are saved, the scattering performance after pouring is good, and the sand removal is very easy; and finally, the reduction of environmental pollution and improvement on work environment are facilitated.

Description

technical field [0001] The invention relates to the technical field of composite adhesives, in particular to a preparation method of a novel foundry composite adhesive. Background technique [0002] At present, the existing casting composite adhesives are usually made of synthetic grease, but the adhesives using the above method have poor performance, low dry tensile strength, poor bonding effect, and low core yield. At the same time, the existing adhesives are prone to produce a large amount of smoke and toxic smell during the drying and pouring process, causing environmental pollution. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of a new casting composite adhesive with excellent performance, high dry tensile strength, high core yield, non-toxic, tasteless and beneficial to improve the working environment. [0004] In order to solve the existing problems of the background technology, the present invention ado...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing casting composite adhesives are usually made of synthetic grease, but the adhesives using the above method have poor performance, low dry tensile strength, poor bonding effect, and low core yield.

At the same time, the existing adhesives are prone to a large amount of smoke and toxic odor during the drying and pouring process, causing environmental pollution