据日刊《轻金属辑要》1987年第829期报道,日本发明了一种制作铝挤压模的新工艺。此种新工艺被称作凝固控制铸造法。顾名思意,既然叫作铸造法,那就说明它不同于以往的金属模具制遣法(锻造法)。然而用这种新方法制作的模具却具有与锻造法制作的模具相同的强度,并克服了锻造品成品率低的缺点。锻件的成品率非常低,往往在50%以下。为此曾试图用失蜡铸造法的铸件制造挤压模, According to the journal “Light Metal Series” 1987, No. 829 reported that Japan invented a new production process of aluminum extrusion die. This new process is called the coagulation control casting method. As the name suggests, since it is called the casting method, it shows that it is different from the previous metalworking method (forging method). However, the mold made by this new method has the same strength as the mold made by the forging method and overcomes the defect of low yield of the forged product. Forgings yield is very low, often below 50%. To this end, attempts have been made to manufacture extrusion dies using castings of the lost wax casting method,