Experimental Study on Stripping Time of Molding Sand Based on Flexible Extrusion Process
Author of the article:DONG Xiaochuan;SHAN Zhongde;LIU Limin;YANG Yanqi;GU Zhaoxian;JIANG Erbiao
Author's Workplace：State Key Laboratory of Advanced Forming Technology and Equipment,China Academy of Machinery Science and Technology,Beijing 100044,China;National-Local Joint Engineering Laboratory of Intelligent Manufacturing Oriented Automobile Die&Mould,Tianjin University of Technology&Education,Tianjin 300222,China
Key Words：hybrid forming technology of sand mold extrusion cutting flexible extrusion mix proportion scheme stripping time
Abstract：
Based on the flexible extruding/cutting composite forming technology of digital sand mould,the effects of different resin and catalyst content on the stripping time and performance of sand mould were studied.The results show that the change of catalyst content has a nonlinear effect only on the molding time,but has little effect on the 24 h tensile strength and air permeability of sand mold.With the increase of the content of resin sand mould stripping time decreases,and 24 h increase tensile strength,permeability is lower,at the same time with different ratio of resin and catalyst to draw time rule curve of multivariate linear regression,the ratio of different resin and catalyst under the condition of sand mould stripping the prediction model of time,flexible extrusion forming technology for sand production scheduling and production efficiency to provide a theoretical basis.
