1. High processing accuracy: A set of molds is generally composed of molds, punch presses, and mold frames, and some can also be assembled modules of multiple pieces. Therefore, the use of upper and lower mold combinations, insert and cavity combinations, and module combinations requires high machining accuracy, and the dimensional accuracy of precision molds usually reaches the m-level.

2. Complex shapes and surfaces: Some products, such as car panels, airplane parts, toys, appliances, etc., are composed of multiple curved surfaces, so the surface of the mold cavity is very complex. Some surfaces must be processed through mathematical calculations.

3. Small batch size: The development of mold production is not achieved through large-scale batch production. In many different situations, enterprises often only produce one batch.

4. Many operations: Mold processing always requires the use of processes such as milling, drilling, drilling, tapping, and threading.

5. The service life of repetitive production molds is relatively long: When the service life of a pair of molds exceeds its service life, a new mold must be replaced, so the production of molds is often repetitive.

6. In the production of imitation processing molds, sometimes there are no drawings or relevant data, and imitation processing needs to be carried out based on the physical model, which requires high imitation accuracy and no deformation.