Forging
Sand Casting-is a cast part produced by forming a mold with the help of a model or pattern pressed into a sand mixture and then removed. Die Casting- is the process of forcing molten metal under high pressure into mold cavities (which are machined into dies).
In sand mold casting the molten metal is poured in to the mold cavity , while in pressure die casting the molten metal is forced under high pressure in to the cavity. The sand casting process is used for small batch production where pressure die casting is used for mass production.
Clay is introduced to the sand for the sand to help mantain its shape when forming. and it make the mould hard and to retain the casting the clay is tow types one is active clay and dead clay
The tooling for gravity casting costs less than pressure die casting but the part cost in pressure die casting is much less. see Sand Casting. Die Casting: In the high pressure, requires a die casting machine to inject molten liquid or semi-liquid metal to a higher rate of die-casting mold cavity filling and solidification under pressure, forming and casting methods obtained. Gravity Casting: Uses the gravity or weight of the metal to fill the cavity producing a metal part. It does not require the use of an expensive die casting machine. The tooling cost is lesser for gravity casting because of the lower pressures needed to produce parts.
Sand casting is used for molding metal shapes and objects. The reason this is called sand casting is because sand is used as a mold. Sand casting is favored by most metal manufacturers because the process of sand casting is very cheap.
advantages of protrude on sand casting
sand
Metal casting can be done thro sand casting ,investment casting , pressure die casting methods
Forging
Sand Casting-is a cast part produced by forming a mold with the help of a model or pattern pressed into a sand mixture and then removed. Die Casting- is the process of forcing molten metal under high pressure into mold cavities (which are machined into dies).
Castings are generally sound, provided that the alloys used exhibit good fluidity. Aluminum is one of the few metals that can be cast by all of the processes used in casting metals. These processes, in decreasing order of amount of aluminum casting, are: die casting, permanent mold casting, sand casting (green sand and dry sand), plaster casting, investment casting, and continuous casting. Other processes such as lost foam, squeeze casting, and hot isostatic pressing are also mentioned.
In sand mold casting the molten metal is poured in to the mold cavity , while in pressure die casting the molten metal is forced under high pressure in to the cavity. The sand casting process is used for small batch production where pressure die casting is used for mass production.
An aluminum casting is made by pouring melted aluminum into a mold. Molds for casting can be easily made by packing "casting sand" in a box and pressing the object to be cast into the sand and removing carefully. Many high school metal shops teach this process.
Casting is the process of pouring liquid metal into a mold. The metal cools and takes the shape of the mold.
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This allows the gases and steam to escape from the mold during casting. The grain size, shape and distribution of the foundry sand, the type and quantity of bonding materials, the density to which the sand is rammed, and the percentage of moisture used for tempering the sand are important factors in regulating the degree of permeability.