In the pouring process, we should control the uniformity and density of concrete.
在浇筑工序中，应控制混凝土的均匀性和密实性。
2
To avoid forming layer defect, rising pouring temperature are using improved coating and selecting low density styrofoam pattern are a great help.
提高金属液浇注温度及改良涂料，选用低密度泡沫塑料作模样材料对避免产生分层缺陷有帮助。
3
An empiric calculated formula of mold filling as a function of vacuum rate, pattern density, pouring temperature and metal static head was established through multiple regression.