USA High pressure process for polyethylene production Google Patents High pressure process for polyethylene production Download PDF Info Publiion number USA. ... manufacturing process Methods title description 5;
· 2. Detailed manufacturing steps in die casting. The high pressure die casting process consists of four steps, including mold preparation, filling, injection, and shake out, which are also the basis for various improved die casting processes. Preparation. In the preparation process, it is necessary to spray a lubricant into the cavity.