树脂砂型流涂工艺质量控制  

Flow Coating Process Quality Control of Furan Resin Sand Mold

作　　者：方世良 孟兆亚 朱守琴 

机构地区：[1]合力股份有限公司合肥铸锻厂,安徽合肥230601

出　　处：《现代铸铁》2015年第3期66-70,共5页Modern Cast Iron

摘　　要：介绍了流涂涂料应具备的合适流变性、悬浮性、流平性、渗透性、抗粘砂性、低的发气量以及良好的气密性等工艺性能。阐述了树脂砂型铸造生产中水基流涂涂料性能的控制,并针对生产过程中常见的缺陷,给出控制措施:通过降低涂料的波美度,增加涂料的流动性,增大铸型的倾斜角度来解决涂料堆积问题;通过调整砂型倾斜角度,增大涂料的波美度,控制脱模剂的使用量来解决裸型问题;通过降低涂料的波美度,提高涂料的流动性,解决滴痕问题;通过降低流涂枪出口压力,并使涂杆头与型腔表面夹角成45°,避免涂料飞溅;通过降低涂料的波美度,采用大流量从上到下迅速流完来解决流痕问题。The properties the coatings used for flow coating process should have were introduced including appropriate rheology,suspensibility,flow-leveling ability,permeability,anti-burn on ability,low gas evolution and good air tightness. The properties control of the water base-coating used for flow-coating process of resin sand mold casting production was described,and the control measures to prevent the defects often occurring in production were given as follows：to increase flowability of the coating by decreasing Baume degrees of the coating;to solve the coating accumulation problem by increasing the inclination angle of the mold;to solve the naked mold problem by adjusting inclination angle,increasing Baume degrees of the coating and controlling stripping agent usage amount;to solve drop trace problem by decreasing Baume degrees of the coating to increase flowability of the coating;to avoid coating splash by decreasing exit pressure of the flow coating gun and by keeping the angle between the coating bar head and mold cavity surface to be 45°;to solve the flow trace problem by decreasing Baume degrees of the coating and by using big flowing rate to fast flow to empty from top to bottom.

关 键 词：树脂砂 流涂 工艺控制 

分 类 号：TG242[金属学及工艺—铸造]