3D打印砂型性能影响因素研究  

Study on the Influencing Factors of 3D Printing Sand Mold Performance

作　　者：洪海春 邵春艳 徐继福 李斌 景文霞 王凯强 HONG Haichun;SHAO Chunyan;XU Jifu;LI Bin;JING Wenxia;WANG Kaiqiang(Beijing National Innovation Institute of Lightweight Co.,Ltd.,Beiing 100083,China)

机构地区：[1]北京机科国创轻量化科学研究院有限公司,北京100083

出　　处：《铸造技术》2021年第8期688-690,共3页Foundry Technology

基　　金：国家重点研发计划资助:基于互联网的3D打印制造创新应用云服务平台(2016YFB1101800)。

摘　　要：基于3D打印工作原理,在打印层厚、铺砂速度等参数不变情况下,研究了呋喃树脂对打印砂型性能的影响,并概述了旧砂回用对砂型性能的影响。结果表明,呋喃树脂加入量小于3%时,砂型抗拉强度增大趋势明显,发气量增加缓慢;树脂加入量大于3%时,砂型抗拉强度增加变缓,发气量明显增大;固化剂为树脂含量的15%时,砂型抗拉强度最大;旧砂加入小于40%时,砂型抗拉强度大于1.3 MPa,打印密度稍有降低。Based on the working principle of 3D printing,the effects of furan resin on the properties of printed sand molds were studied under the conditions of constant printing layer thickness and sand laying speed,and the effects of old sand reuse on the properties of printed sand molds were summarized. The results show that when the addition of furan resin is less than 3%,the tensile strength of sand mould increases obviously,and the gas production increases slowly. When the resin content is more than 3%,the tensile strength of sand mold increases slowly,and the gas generation capacity increases obviously. When the curing agent is 15% resin content,the tensile strength of sand mold is the highest. When the used sand is added less than 40%,the tensile strength of the sand mould is greater than 1. 3 MPa,and the printing density is slightly reduced.

关 键 词：3D打印 呋喃树脂 型砂性能 旧砂回用 打印密度 

分 类 号：TG242[金属学及工艺—铸造]