POSSIBILITIES OF BURRS ELIMINATION FROM CORES PRODUCED WITH COLD-BOX-AMINE TECHNOLOGY

Abstract

Actual problem of all foundries that produce core castings with the Cold-Box-Amine methods are surface defects. Most common surface defect are burrs. Therefore it is needed to specify the possibilities for preventing the burrs, or make their occurrence as low as possible. According to the knowledges, the best way of eliminating the burrs is using of additives. Experiments were executed on two types of gray cast iron castings, where during preparation of mould mixture for first casting additive EP 3767/2 had been used and additive Spherox had been used for second casting. These chosen additives showed good results, surface of castings was clean, without surface defects. Given the effectiveness of selected additives only for specific types of castings, it is necessary to define the effects of these additives on the quality of the castings. For further production of flawless cast, it is necessary to describe all the possibilities of eliminating burrs.