Does the product designer need to be concerned with the location of the ejector pins built into the die casting die?
A. Ejector pins are used to push the casting out of the die after the metal shot has been made and the casting solidified. The die caster will always attempt to locate ejector pins in a nonfunctional area of the casting, such as in an overflow, on a boss, in the bottom of a deep pocket. The size, location and number of ejector pins required is important for successful part production. Each ejector pin will leave a slight impression on the cast surface, so they are not placed against the cosmetic surface side of the part. It is vital that the product design engineer point out all such cosmetic part surfaces, and understand where all ejector pin impressions will occur. Guidelines on ejector pin locations are discussed in the NADCA Product Standards Manual (See description & Discount Order Form).
