美国专利US8757242本发明提出了一种不易产生气孔缺陷的压铸模具,这种模具的浇道在分支部分分为两个浇道,而这两个分开的浇道末端分别与铸件型腔连接,其中浇道包含一个位于分支部分上游的主浇道和位于分支部分下游的多个分浇道,浇道窝是主浇道的延伸,其在分支部分有一个朝向主浇道的开口,并且开口的宽度大于主浇道的宽度。 US Pat. No. 8,757,242 The invention proposes a die-casting mold which is not prone to porosity defects and whose runner is divided into two runners at the branch part and the two separate runner ends are respectively connected with the casting cavity, wherein The runner includes a main runner located upstream of the branch portion and a plurality of sub-runners located downstream of the branch portion, which is an extension of the main runner and has an opening toward the main runner at the branch portion, and an open The width is greater than the width of the main runner.