1.基本原理及优点真空吹气造型法是日本铸造技术普及协会1983年研究成功的,简称VRH法。同年研制出了真空吹气造型装置。这种方法的基本原理是:加好砂子的砂箱(或芯盒)被推入真空室中,用真空泵抽掉砂粒间的空气,吹入硬化气体,使型(芯)砂硬化。这种造型方法适用于水玻璃——CO_2造型法和冷芯盒(氨气、SO_2)制芯法等所有用气体硬化的造型制芯方法。 1. Fundamentals and Advantages Vacuum blow molding method is the success of the foundry technology universal association of Japan in 1983, referred to as the VRH method. The same year developed a vacuum blow molding device. The basic principle of this method is that the sand box (or core box) with good sand is pushed into the vacuum chamber, the air between the sand grains is pumped out by the vacuum pump, and the hardened gas is blown in to harden the sand of the core. This modeling method is suitable for all water-glass-CO 2 molding methods and cold core box (ammonia, SO_2) core method and so on all with gas hardening core molding method.