Question

Due to the presence of ejector die, there is no need of lubricant for the removal of casting from the dies.

(a) True

(b) False

This question was addressed to me during an online exam.

Question is from Die Casting topic in division Special Casting Techniques of Casting-Forming-Welding I

Answer 1

The correct answer is:

(b) False

Explanation:

Even though ejector dies are used in die casting to help remove the casting from the die after solidification, lubricants are still typically required to facilitate the easy removal of the casting and to reduce wear on the die. Lubricants help in preventing the casting from sticking to the die, ensuring a smooth ejection process, and minimizing friction between the die and the molten metal.

Ejector dies assist in pushing the casting out of the mold after it has cooled, but they do not eliminate the need for lubrication. The lubrication reduces the chances of defects like sticking, galling, or premature wear on the die, which could occur without proper lubrication.

Thus, the statement is false, as lubricants are still important in the die casting process.