casting is one of the oldest and most widely used methods of making metal parts. Casting includes several main steps:
1. Template design
first designs the template designer based on the piece. The templates can be permanent or temporary. Temporary molds (such as sand molds) are made for each new piece, while permanent molds (such as metal molds) are used for mass production.
1. Mold Making
For sand molds, special casting sand is mixed with various adhesives and placed around the model (or muscle) mold. After hardening, the model is removed and the mold cavity remains. In permanent molds, a metal mold is made with the reverse shape of the desired piece.
1. Metal smelter
The selected metal is heated to its melting temperature to liquefy. This work is usually done in special ovens.
1. Source of molten metal
The molten metal is poured into the mold. This work must be done carefully to ensure that the cavity of the mold is completely filled and to avoid air bubbles.
1. Freezing
Molten metal becomes cold and frozen. This process can be fast or slow that affects the crystal structure and mechanical properties of the piece.
1. Remove the piece
After freezing, the piece comes out of the mold. In sandy molds, the sand is separated from the slope and in permanent formats, the piece is pulled out using specific mechanisms.
1. Final Pay
The cast part may require finishing operations such as turning, grinding or polishing to achieve the desired final dimensions and smooth surface.
Casting Types:
Sand casting: use sand to make disposable molds. precise casting: Use wax or plastic to create very precise molds. Pressure or diques: Pour high -pressure molten metal into metal molds. Continuous casting: to produce long bars and sections.
Each of these methods has its own advantages and disadvantages, and choosing the right method depends on the metal used, the complexity of the piece, the production run, and the accuracy and quality requirements. Mohammadi Metals Melting proudly hosts dear customers from all over the country in the production of metal parts and castings.
