Metal Casting Terminology | RTO | GATE | Study material | Manufacturing Engineering

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Metal Casting


It is Mother of all other Manufacturing Process.

It is used for mass production.

👉Steps in metal casting
  1. Preparation of Pattern 
  2. Preparation of Mould
  3. Gating System Design
  4. Riser Design
  5. Melting the Metal
  6. Pouring of Molten Metal
  7. Solidification
  8. Felting
  9. Finishing 
  10. Testing

CASTING TERMINOLOGY

✔️ Pattern: It is defined as Replica of a part to be produced with some allowance. It is similar to the product but not same.
    
            Pattern = Product + Allowance

✔️ Flask: The rigid metal or wood frame that holds the molding aggregate in called flask.

✔️ Mould: A mould refers to avoid created in a compact sand mass which, when filled with molten metal, will produce a casting. The mould cavity lies within the mould and holds the liquid material.

✔️ Gating System: Gating system is the network of  channels used to deliver the molten metal into the mould cavity. It consists of pouring basin, sprue, runner and gate.

✔️ Core: Core is a sand mass which is inserted into the module to produce identical shaped regions such as holes or passage for water cooling or otherwise define the interior surface of the casting.

✔️ Core prints: Core prints are the projects parts added to the pattern which is used to locate the core within the mould.

✔️ Chaplet: Chaplets are used to support cores inside the mould cavity to take care of its own weight and overcome the metallostatic force.

✔️ Chills: Chills are metallic object which are placed in the mould in increase the cooling rate of the castings to provide uniform or desired cooling rate.

✔️ Riser: It is a reservoir of molten metal provided in the casting so that hot metal can flow back into  the mould cavity when there is a reduction in volume of metal due to solidification.


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