Characteristics And Components Of Plastic Mold Processing
Plastic mold processing refers to the processing of plastic molding and plastic blanking tools. It consists of an upper mold and a lower mold. Its basic characteristics are as follows:
1. High processing accuracy requirements
A mold is generally composed of a concave mold, a convex mold and a mold base, and some may also be a multi-piece split module. Therefore, the combination of upper and lower molds, the combination of inserts and cavities, and the assembly of modules require high machining accuracy. The dimensional accuracy of precision molds often reaches the μm level.
2. Complex shape
Some products, such as automobile covering parts, aircraft parts, toys, and household appliances, have a surface that is composed of multiple curved surfaces. Therefore, the mold cavity surface is very complicated. Some curved surfaces must be processed by mathematical calculation methods.
3. Small batch
Mold production is not mass production, and in many cases only one pair is produced.
4. Many processes
Various processes such as milling, boring, drilling, reaming and tapping are always used in mold processing.
5. Repeated production
The use of molds has a long life. When the use of a pair of molds exceeds its life, a new mold must be replaced, so mold production is often repetitive.
6. Profiling
Sometimes there is neither pattern nor data in mold production, and it is necessary to perform profiling processing according to the actual object. This requires high imitation accuracy and no deformation.
7. Excellent mold material and high hardness
The main material of the mold is mostly made of high-quality alloy steel, especially the long-life mold, which is often made of ledeburite steel such as Crl2, CrWMn. This type of steel has strict requirements from rough forging, processing to heat treatment. Therefore, the preparation of processing technology cannot be ignored, and heat treatment deformation is also a problem that needs to be taken seriously in processing.
