The gravity casting machine is capable of producing products for many industries, such as tableware, auto parts, and electrical accessories. However, the production is completed by pouring molten metal into gravity casting molds placed on the machine. Why do manufacturers need to preheat the gravity casting molds before casting?

Gravity casting molds that have not been preheated cannot be directly cast. Due to the good thermal conductivity of the metal in gravity casting molds, the casting process accelerates the cooling rate of the aluminum liquid, causing a rapid decrease in its fluidity. This can easily lead to surface defects such as cold shuts, incomplete filling, and pores, and also affects the quality of the gravity casting mold due to increased stress.

Noshun's tilting gravity casting machines typically undergo preheating before casting. The appropriate preheating temperature is usually determined by the material, type, and size of the casting. Different circumstances may require varying preheating temperatures for gravity casting molds. The molds on Noshun's gravity casting machines are generally heated to above 150 degrees using a blowtorch.