硅砂界面预处理对三乙胺冷芯盒树脂砂性能影响的研究

Effect of Interface Pretreatment of Silica Sand on Properties of Triethylamine Cold Box Resin Sand

三乙胺冷芯盒工艺,是铸造生产中常用的制芯工艺,该工艺中常用的造型砂为天然硅砂。目前对造型材料的要求是有更高的强度及更低的发气量。本文通过对天然硅砂进行界面预处理,改善了天然硅砂的界面状态,提高了冷芯盒树脂与砂的粘接强度。并且经过预处理后的硅砂强度能提高54.5%,砂芯吸湿性明显改善,可以降低砂芯树脂加入量,降低浇注过程中有害气体的产生,提高冷芯盒树脂砂的整体性能。

Triethylamine cold box process is a common core making process in the casting production. The molding sand commonly used in this process is natural silica sand. At present, the requirements for molding materials are higher strength and lower gas evolution. In this study, the interface state of natural silica sand was improved and the bonding strength between cold box resin and sand was increased through the interface pretreatment of natural silica sand. And the strength of silica sand after pretreatment was increased by 54.5%;the moisture absorption of sand core was significantly improved, which not only reduced the amount of resin added in the sand core, but also reduced the generation of harmful gas in the pouring process, and improved the overall performance of cold box resin sand.