The difference between die casting, precision casting and lost wax casting
Die casting: short for pressure casting, it is a casting method in which molten alloy liquid is poured into a pressure chamber, filling the cavity of a steel mold at high speed, and solidifying the alloy liquid under pressure to form a casting. The main features of die casting that distinguish it from other casting methods are high pressure and high speed.
Precision casting: Precision casting is a special casting. Parts obtained by this method generally do not require further machining. Such as investment casting, pressure casting, etc. Precision casting is a casting method relative to the traditional casting process. It can obtain relatively accurate shape and high casting precision. The more common practice is: first design and manufacture a mold according to the product requirements (with very little or no margin), cast wax by casting, and obtain the original wax mold; repeat the coating and sanding on the wax mold Process, hardening the shell and drying; then melt the internal wax mold to dewax and obtain the cavity; bake the shell to obtain sufficient strength; pour the required metal materials; High-precision finished product. According to product needs or heat treatment and cold working.
The lost wax casting method first appeared in the Spring and Autumn Period, and the entire manufacturing process is a manual operation. Its technological process is: the wax is made into the shape to be made, and then the high temperature resistant fine mud is drenched on the surface of the wax mold, and the spun yarn is sprinkled on the surface of the mud, repeated many times to form a complete shell, and after drying Heating makes the wax melt out to form a cavity for casting copper liquid (ie: copper plus lead, zinc, tin, and other metal elements solution). After casting, shelling, grinding, and aging, an exquisite antique bronze will be displayed in front of you. Lost wax precision casting is now called investment precision casting. It is a precision casting process with little or no cutting. It is an excellent technology in the precision casting industry and is widely used. It is not only suitable for precision casting of various types and alloys but also produces castings with higher dimensional accuracy and surface quality than other precision casting methods. The castings can be cast by investment precision casting.