Casting Defects Such as Gas Bubbles and Finnlng in Organically Bonded Molds and Cores
1 Introduction Although green sand is still used in the modem foundry industry, the great majority of cast products are manufactured using molds made of organically bonded silica sand. The processes used to manufacture molds and cores are not limited with respect to either the wall thickness or the productivity. Different processes are used for series casting and heavy castings (furan-phenolic no bake binders being common in the latter case). All synthetic resin systems have one property in common: they bum or pyrolyze at temperatures above 100 ℃. Under certAln conditions, the volumes of gas liberated in this process can lead to gas bubbles in the casting and thus to defective parts. In the present case, however, the investigations specifically concerned only exogenic gas bubbles of larger dimensions. A method of measurement developed by Levelink and Julien was used in this work.
Klause loechte
Huttenes-Albertus chemische werke Gmbh
国际会议
69th World Foundry Congress(第69届世界铸造会议 WFC 2010)
杭州
英文
600-602
2010-10-16（万方平台首次上网日期，不代表论文的发表时间）