Which redistribution process uses investment (lost wax) casting?

Which redistribution process uses investment (lost wax) casting?

• A. Sand casting
• B. Die casting
• C. Low-temperature pewter casting
• D. Investment (lost wax) casting

Answer: (D)

Investment (lost wax) casting uses a wax pattern that is coated with a ceramic shell, then the wax is melted away to leave a hollow mold. Molten metal is poured into this shell to form the part. This method is chosen because it can reproduce very fine detail and complex shapes with good surface finish and close tolerances, making it ideal for intricate components and small to medium production runs. Other methods don’t use the wax pattern that’s melted away; sand casting relies on a sand mold, die casting uses a reusable metal die, and low-temperature pewter casting is a simpler, lower-cost process for softer alloys.

Investment (lost wax) casting uses a wax pattern that is coated with a ceramic shell, then the wax is melted away to leave a hollow mold. Molten metal is poured into this shell to form the part. This method is chosen because it can reproduce very fine detail and complex shapes with good surface finish and close tolerances, making it ideal for intricate components and small to medium production runs. Other methods don’t use the wax pattern that’s melted away; sand casting relies on a sand mold, die casting uses a reusable metal die, and low-temperature pewter casting is a simpler, lower-cost process for softer alloys.