Casting Part 1 Definitions and Terms

Casting Part 1 Definitions and Terms

Types of casting methods:

A) Disposable casting:

1. Casting in sand
2. Shell casting
3. Precise casting
4. Casting in ceramic mold
5. Casting in gypsum mold

B) Casting in permanent molds:

1. Gravity casting
2. Pressure casting
3. Centrifugal casting

Definitions and terms in casting

Model: It is made in the shape of the final piece and has the task of creating the shape of the hole.
Gate: A network of ducts for the melt to pass from the outside of the mold into it.
 Grade: The box contains the molding sand in which the mold is made.
Melt pool: It is responsible for controlling the flow of melt into the mold.
Air passage hole: It is created so that air is not trapped inside the mold
Separation line: The common surface separating the two halves of the mold or model or muscle
 Feeder: Extra cavity embedded in the mold to compensate for shrinkage due to freezing
 Muscle: By being inside the mold, it causes an empty hole in the mold.
. Muscle support: An extra part that is inserted to hold the muscle.
 The conical shape of the model or mold so that the model or part can be removed from the mold.
. Muscle box: is a template for building muscle
Shrinkage: The piece shrinks due to freezing and cooling.

Slope

 In the model or mold, an angle is considered so that the workpiece can
Easy to get out.
 Its value depends on the dimensions and shape of the workpiece.
 This slope causes the output piece of the casting process to be larger than
Produce the desired piece.
This extra amount is removed by machining.

Feeder

It is embedded in the mold to compensate for the contraction caused by solidification.
Its dimensions must be calculated so that it does not solidify before the piece.
For this purpose, the cooling rate of the melt must be less than the cooling rate
Melt in less form.

Cooling

Basically, the cooling rate has a direct impact on the quality of the parts produced by the method
It has castings.
As the cooling rate decreases, the coarse grain characteristics
Its mechanics, such as strength and fracture toughness, are reduced.

Contraction

It occurs due to two main factors:
 Due to solid cooling.
They get bigger to get rid of the piece.


Due to the change of liquid phase to solid.
They use a feeder to get rid of it.

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