Four Factors that Affect

There are 4 factors that affect or are characteristic of the casting process, namely:

1. The flow of molten metal into the molding cavity

2. There was a heat transfer during solidification and cooling of the metal in the mold

3. Effect of printed material

4. Freezing of molten metal from the condition.

Classification is based on the age of the casting mold, there are casting with disposable (expendable mold) and no permanent mold casting (permanent mold). Expendable sand molds included in the mold. Therefore can only be used one time casting alone, after which the mold is destroyed when making the casting. In mold making, the types of sand used was silica sand, zircon sand or green sand. While the adhesive between the grains of sand can be used, bentonite, resins, furan or water glass. as follows:

1. Cavity (mold cavity), is the room where the molten metal is poured into the mold. The shape of the cavity is equal to the workpiece to be casted. Cavity mold made using a pattern.

2. Core (core), its function is to create a cavity in the casting. The core is made separately with mold and assembled at the time of the mold will be used.

3. Gating system (system inlet), an inlet of the mold kerongga descending channel.

4. Sprue (channel down), an inlet from the outside to the vertical position. This channel can also be more than one, depending on the desired casting speed.

5. Pouring basin, the grooves on the mold whose main function is to reduce the speed of the liquid metal goes directly from the ladle into the sprue. High speed metal flow may occur in the sprue erosion and the transport of liquid metal impurities originating from the furnace kerongga mold.

6. Raiser (enhancer), a useful reserve of liquid metal in the mold cavity to fill back in case of shrinkage due to solidification. The metals that can be used to perform the casting process, namely: Cast iron, white cast iron, gray cast iron, cast iron maliable, nodular cast iron, cast steel and others. Metal smelting is the most important aspect in casting operations as a direct effect on the quality of the cast product. In the smelting process, first charge consisting of metal, alloying elements and other materials such as flux and slag forming elements inserted into the furnace. Flux is the inorganic compound that can "clean up" the molten metal by removing gases dissolved participate and also elements of impurity (impurities). Flux has beberpa usability depends on molten metal, such as aluminum alloys are cover fluxes (which prevents oxidation of the aluminum surface of the liquid), Cleaning fluxes, drossing fluxes, refining fluxes, and dry wall fluxes. Smelting furnaces used in the foundry industry is an electric arc furnace, induction furnace, furnace crucibles, and a cupola furnace.