| abstract |
The purpose of the present invention is to provide a binder used for sand casting 3D printing and a preparation method therefor, the binding used for sand casting 3D printing being composed of the following components in part by weight: 50-100 parts of phenolic compounds, 10-50 parts of aldehydes, 800-1000 parts of furfuryl alcohol, 15-50 parts of modifier, 1-10 parts of catalyst, and 3-5 parts of coupling agent. The present binder has low viscosity and high purity, meeting the requirements of 3D printing devices for the physical and chemical properties of binders and also meeting production application requirements for aspects of casting process performance such as binding strength, curing speed, and sand casting gas generation volume. |