2. Trimming (TR) mold

A trimming mold is used to cut sheet metal into an appropriate size and shape, such that the restriking mold can bend. During this operation, the most essential factor is trim cutter and scrap cutter position in a combination that enables sheet metal scrap to automatically drop and be removed after trimming.

3. Restriking (RST) mold

Restriking is an operation in which sheet metal is molded into a desired shape. The main activities in this process are flanging and restriking. Flanging refers to the process of folding edges at a 90° angle, while restriking refers to folding at any angle and is usually driven by a cam for wide areas. When designing a mold for restriking, one should compensate for springback, which can be determined based on raw material characteristics.

## 4. Piercing (PI) mold

Piercing is typically the last operation. When piercing is done prior to restriking, the position of a hole can move or hole shape can deform during shaping.
