石膏型快速烘干工艺的研究  

Rapid Drying Method for Plaster Mold

作　　者：赵忠兴[1] 石颖科[1] 叶锦华[1] 

机构地区：[1]沈阳理工大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2008年第6期460-461,共2页Special Casting & Nonferrous Alloys

摘　　要：采用微波技术烘干石膏型;通过改变微波频率和石膏型当量厚度,探讨石膏型微波烘干过程的影响因素,并与常规的电阻干燥箱烘干工艺进行比较分析。试验结果表明,微波频率提高使石膏型失水速度加快,烘干时间缩短;石膏型的当量厚度对烘干时间影响不大,但随着当量厚度的增加,石膏型失水速度加快;微波烘干石膏型达到100%失水率,大约需要1.5h,而电阻干燥箱烘干则需要近30h。微波烘干效率提高近20倍,但烘干后的抗拉强度较低。Effects of micro-wave frequency and equivalent thickness of plaster mold on micro-wave drying process have been approached,and which was co mpared with that by conventional oven drying process.The results show that the increase of micro-wave frequency can increase the rate of loss water and shorten drying time.Although the equivalent thickness of plaster mold has somewhat effects on drying time,it has greatly effect on the rate of loss water of plaster mold.The rate of loss water of plaster mold can be fasted with the increase of equivalent thickness.It is need about 1.5 hours for drying plaster mold by microwave to 100% loss water rate while it is need about 30 hours by conventional oven drying method.The drying efficiency of microwave is improved by 20 times,however,the tensile strength of the plaster is lower than that by conventional oven drying.

关 键 词：微波 石膏型 烘干 铸造 

分 类 号：TG249.5[机械工程—精密仪器及机械]