(1) plastic mold processing accuracy requirements of a pair of molds generally by the die, punch and die frame, and some may also be more than pieces of the module. So the combination of the upper and lower molds, the combination of the insert and the cavity, the splicing between the modules requires a high degree of machining accuracy. The precision of precision molds is often up to a micron level.

(2) complex surface, some products such as car panels, aircraft parts, toys, household appliances, the shape of the surface is a combination of a variety of surfaces, so the mold cavity surface is very complicated. Some surfaces must be processed mathematically.

(3) small batch, mold production is not mass production in batches, in many cases often only produce a pair.

(4) process, mold processing always used milling, boring, drilling, hinge and tapping and other processes.

(5) repeat the production, the use of mold is life. When the use of a pair of molds over their life, it is necessary to replace the new mold, so the mold production is often repeatable.

(6) copy processing, mold production sometimes no pattern, there is no data, but also according to the physical copy processing. This requires high imitation precision, no deformation.

(7) mold material excellent, high hardness of the main mold material used in high-quality alloy steel, especially high-life mold, often using Crl2, CrWMn and other products made of Leytus steel. This type of steel from the rough forging, processing to heat treatment are stringent requirements. So the preparation of processing technology can not be ignored, heat treatment deformation is also the need to seriously deal with the problem.According to the above characteristics, in the selection of machine tools to meet the processing requirements as much as possible. Such as the function of the CNC system to be strong, high precision machine, rigid, thermal stability is better, with copy function.