Why is a foundry pattern larger than the part it is designed to produce?

1 ⤊

Why is a foundry pattern larger than the part it is designed to produce?

2006-11-15 06:41:41 · 2 answers · asked by ciii4ever 1 in Science & Mathematics ➔ Engineering

2 answers

A foundry pattern is used to make a mold (U.K. spelling) into which molten metal is poured to create a particular shape. When molten metal cools and solidifies it decreases in volume so to produce the right size the pattern is made slightly larger to take this shrinkage into account..

2006-11-15 06:50:48 · answer #1 · answered by U.K.Export 6 · 1⤊ 0⤋

Because it goes around the part. How could it not be bigger??

2006-11-15 14:44:33 · answer #2 · answered by igot4onit 2 · 0⤊ 1⤋