绿色环保无机发泡砂的制备及性能

Preparation and Properties of Green and Environmentally Friendly Inorganic Foam Sand

采用WJ-1无机粘结剂,加入发泡剂、发泡促进剂改性,并在混砂时加入FT-1添加剂,获得了具有较高强度和优异清砂性能的绿色环保无机发泡砂;通过挤压将发泡砂加入到预热模具中硬化,形成中空的砂型(芯);浇注铸件后,砂型(芯)具有优异的溃散性,能够通过振动和气流等低成本且简单方法实现砂型(芯)清除,省去以往所使用的如粉碎处理、热处理、喷砂处理等繁杂的清砂方法,简化砂型铸造后处理工艺。

By adding the foaming agent,the foaming promoter to the WJ-1 inorganic binder,and adding FT-1 additive during sand mixing,a green and environmentally friendly inorganic foaming sand with higher strength and excellent sand cleaning performance was obtained.It was then added to the preheating mold by extrusion to harden,forming a hollow sand mold(core).After casting,the sand mold(core) has excellent collapsibility,and the removal of sand molds can be achieved through low-cost and simple methods such as vibration and airflow,eliminating the complex sand cleaning methods such as crushing,heat treatment,sandblasting,etc.and simplifying the postprocessing processes of sand casting.