Plastic mold processing refers to the processing of plastic molding and plastic blanking tools. It consists of two parts: upper mold and lower mold. Its basic characteristics are as follows:
(1) High processing precision requirements A pair of molds are generally composed of a die, a punch and a mold base, and some may also be a multi-piece split module. Therefore, the combination of the upper and lower molds, the combination of the inserts and the cavities, and the flattening between the modules require high processing precision. Precision molds often have dimensional accuracy of up to μm.
(2) Complex shapes Some products, such as automobile covers, aircraft parts, toys, and household appliances, have a surface that is composed of a variety of curved surfaces. Therefore, the cavity surface of the mold is complicated. Some surfaces must be processed mathematically.
(3) Small batch production The production of molds is not mass production in large quantities, and in many cases, only one production is often produced.
(4) Many processes Many processes such as milling, boring, drilling, reaming and tapping are used in the mold processing.
(5) Repetitive production The use of the mold is long-lived. When the use of a mold exceeds its life, a new mold is replaced, so the production of the mold is often repetitive.
(6) Profile processing Sometimes there are no drawings and no data in the mold production, and it is necessary to carry out contour processing according to the actual object. This requires high precision and no distortion.
(7) Excellent mold material and high hardness The main materials of the mold are mostly made of high-quality alloy steel, especially high-life molds, which are often made of Crl2, CrWMn and other Leysite steel. This type of steel has strict requirements from rough forging, processing and heat treatment. Therefore, the preparation of the processing technology can not be ignored, heat treatment deformation is also a problem that needs to be taken seriously in processing.