我国工业的发展对于铸造业提出的任务,首先是能够提供高质量的铸件。但是,铸件的废品不少是由于造型材料的性能不良所造成的,尤其是型砂的高温性能与铸件质量的关系更为密切。近年来,为了能高效率的生产高质量的铸件,铸型在高比压下成型,使获得的铸型有较高的密度和硬度。夹砂类缺陷是采用高压造型铸件的主要缺陷之一,因此随着高压造型工艺的发展,对型砂质量提出了更高的要 The development of China’s industry for the foundry industry’s task, the first is to provide high-quality castings. However, a lot of castings scrap is due to the poor performance of modeling materials caused, especially the high-temperature performance of sand and casting quality is more closely related. In recent years, in order to produce high-quality castings with high efficiency, the molds are formed at a high ratio of pressure so that the obtained molds have higher density and hardness. Sand-type defects is the use of high-pressure castings one of the main flaws, so with the development of high-pressure molding process, the sand quality put forward higher