采用水平造型，水平浇注以及底注式浇注系统，在四个支管与主管连接热节处设置保温冒口，支管与主管内部设置冷铁，结果表明金属液充型平稳，达到顺序凝固，热节处孔洞类缺陷消除。

Using horizontal molding, horizontal pouring and bottom injection pouring system, the heat preservation riser is set at the hot joint connecting four branch pipes and main pipe. The branch pipe and the main pipe are provided with chillers inside. The results show that the filling of liquid metal is stable, but it reaches the sequence solidification, and holes are eliminated at the hot joint.