Q1: What is Die Casting?
Ans: Die casting is a manufacturing process in which molten metal is forced into a mold (die) under pressure to produce metal parts.
Q2: Briefly explain the process of Die Casting.
Ans: In die casting, molten metal is injected into a metal mold under high pressure.
After cooling and solidifying, the casting is removed from the die.
Q3: Briefly explain the process of Gravity Die Casting.
Ans: In gravity die casting, molten metal is poured into the mold using gravity without applying pressure.
The metal fills the mold and solidifies naturally.
Q4: Briefly explain the process of Pressure Die Casting.
Ans: In pressure die casting, molten metal is injected into the die under high pressure.
This ensures better filling and accurate shape of the casting.
Q5: State any six uses of Die Casting.
Ans: Uses of die casting are:
- ➔ Automobile parts
- ➔ Electrical components
- ➔ Machine parts
- ➔ Household equipment
- ➔ Toys and hardware items
- ➔ Aircraft components
Q6: State any six advantages of Die Casting.
Ans: Advantages of die casting are:
- ➔ High production rate
- ➔ Good surface finish
- ➔ Accurate dimensions
- ➔ Less machining required
- ➔ Strong and durable products
- ➔ Complex shapes can be made
Q7: State any four disadvantages of DIe Casting.
Ans: Disadvantages of die casting are:
- ➔ High initial cost of equipment
- ➔ Not suitable for small production
- ➔ Limited to low melting point metals
- ➔ Possibility of air trapped in casting
Q8: State the die materials used for Die Casting.
Ans: Die materials used are:
- ➔ Tool steel
- ➔ Alloy steel
- ➔ Cast iron
Q9: State the properties of Die Materials.
Ans: Properties of die materials are:
- ➔ High strength
- ➔ Heat resistance
- ➔ Good wear resistance
- ➔ Good thermal conductivity
- ➔ Resistance to thermal shock
Q10: State the names of Die Casting Machines.
Ans: Types of die casting machines are:
- ➔ Hot Chamber Die Casting Machine
- ➔ Cold Chamber Die Casting Machine
- ➔ Submerged Plunger Type Machine
- ➔ Direct Air Pressure Machine
Q11: Briefly explain the working of Hot Chamber Die Casting Machine.
Ans: In hot chamber machine, the melting furnace is attached to the machine.
Molten metal is injected into the die through a plunger directly from the chamber.
Q12: Briefly explain the working of Cold Chamber Die Casting Machine.
Ans: In cold chamber machine, molten metal is first poured into a chamber.
Then it is injected into the die using a piston under pressure.
Q13: Briefly explain the working of Submerged Plunger Types Casting Machine.
Ans: In this machine, the plunger is submerged in molten metal.
It pushes the metal into the die cavity under pressure.
Q14: Briefly explain the working of Direct Air Pressure Die Casting Machine.
Ans: In this machine, compressed air is used to force molten metal into the die.
The air pressure ensures proper filling of the mold.
Q15: Briefly enlist the steps involved in Die Casting.
Ans: Steps involved in die casting are:
- ➔ Preparation of die
- ➔ Melting of metal
- ➔ Injection of molten metal
- ➔ Cooling and solidification
- ➔ Removal of casting
- ➔ Finishing of product
