Types of Casting Processes

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Which casting process is the most widely used?

Permanent mold casting

Die casting

Investment casting

Sand casting (correct)

For which type of metals is sand casting particularly suitable?

Metals with high melting temperatures like steels, nickels, and titaniums (correct)

Precious metals like gold and silver

Aluminum and copper alloys only

Low melting point metals only

What is required after the casting is removed from the sand mold?

PVD coating

Ultrasonic cleaning

Painting

Heat treatment (correct)

What is included in the sand mold to create the cavity for casting?

Pattern Signup and view all the answers

Why must a new sand mold be made for each part produced in sand casting?

The mold is sacrificed to remove the casting Signup and view all the answers

Besides the casting operation itself, what other components are involved in sand casting?

Fabrication of the pattern and making of the mold Signup and view all the answers

Which of the following is NOT a disadvantage of casting processes?

High dimensional accuracy and surface finish Signup and view all the answers

What is the primary function of a foundry?

All of the above Signup and view all the answers

Why is the mold cavity slightly oversized compared to the desired final part?

To allow for shrinkage during solidification and cooling Signup and view all the answers

What type of mold is used in an open mold casting process?

Open mold Signup and view all the answers

Which of the following is NOT a potential safety hazard when processing hot molten metals in casting?

Improved dimensional accuracy Signup and view all the answers

What is the primary role of the workers who perform the casting operations in a foundry?

To be called foundrymen Signup and view all the answers

What is the primary purpose of the gating system in a closed mold?

To allow the molten metal to flow into the mold cavity Signup and view all the answers

Which type of mold is considered more important for production casting operations?

Permanent mold Signup and view all the answers

What is the primary characteristic of an expendable mold?

It must be destroyed to remove the casting Signup and view all the answers

What is the primary advantage of the expendable mold casting processes?

They can produce castings with more complicated geometries Signup and view all the answers

What is the primary limitation of the permanent mold casting processes?

They can only produce simple part shapes Signup and view all the answers

Which permanent mold casting process is mentioned as the most familiar?

Die casting Signup and view all the answers

What is the main purpose of baking a dry-sand mold in an oven?

To strengthen the mold and harden the cavity surface Signup and view all the answers

What is the main disadvantage of dry-sand molding compared to green-sand molding?

Dry-sand molding has a lower production rate Signup and view all the answers

What is the purpose of the gating and riser system in a mold?

To deliver liquid metal into the cavity and provide a reservoir of molten metal during solidification shrinkage Signup and view all the answers

What is the main advantage of a skin-dried mold compared to a green-sand mold?

Improved dimensional control of the cast product Signup and view all the answers

What is the purpose of adding special bonding materials to the sand mixture in a skin-dried mold?

To strengthen the cavity surface of the mold Signup and view all the answers

What is the primary reason that moisture in the sand can cause defects in some castings?

It depends on the metal and geometry of the part Signup and view all the answers

What is the primary function of chaplets in a mold cavity?

To hold the core in place within the mold cavity Signup and view all the answers

What is the typical composition (by volume) of a foundry sand mixture?

90% sand, 3% water, 7% clay Signup and view all the answers

Which of the following factors can influence the permeability of a mold?

All of the above Signup and view all the answers

What is the purpose of using a flask in the mold making process?

All of the above Signup and view all the answers

Which property of the foundry sand is most important for achieving a better surface finish on the cast part?

Small grain size Signup and view all the answers

What is the primary function of the bonding agent in the foundry sand mixture?

To hold the sand grains together Signup and view all the answers

Types of Casting Processes

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Questions and Answers

Which casting process is the most widely used?

For which type of metals is sand casting particularly suitable?

What is required after the casting is removed from the sand mold?

What is included in the sand mold to create the cavity for casting?

Why must a new sand mold be made for each part produced in sand casting?

Besides the casting operation itself, what other components are involved in sand casting?

Which of the following is NOT a disadvantage of casting processes?

What is the primary function of a foundry?

Why is the mold cavity slightly oversized compared to the desired final part?

What type of mold is used in an open mold casting process?

Which of the following is NOT a potential safety hazard when processing hot molten metals in casting?

What is the primary role of the workers who perform the casting operations in a foundry?

What is the primary purpose of the gating system in a closed mold?

Which type of mold is considered more important for production casting operations?

What is the primary characteristic of an expendable mold?

What is the primary advantage of the expendable mold casting processes?

What is the primary limitation of the permanent mold casting processes?

Which permanent mold casting process is mentioned as the most familiar?

What is the main purpose of baking a dry-sand mold in an oven?

What is the main disadvantage of dry-sand molding compared to green-sand molding?

What is the purpose of the gating and riser system in a mold?

What is the main advantage of a skin-dried mold compared to a green-sand mold?

What is the purpose of adding special bonding materials to the sand mixture in a skin-dried mold?

What is the primary reason that moisture in the sand can cause defects in some castings?

What is the primary function of chaplets in a mold cavity?

What is the typical composition (by volume) of a foundry sand mixture?

Which of the following factors can influence the permeability of a mold?

What is the purpose of using a flask in the mold making process?

Which property of the foundry sand is most important for achieving a better surface finish on the cast part?

What is the primary function of the bonding agent in the foundry sand mixture?

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Types of Casting Processes

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