塑胶模具等级分类（Classification of plastic moulds）.doc

塑胶模具等级分类（Classification of plastic moulds） Classification of plastic moulds Die classification: The American Plastics Industry Institute (SPI AN-102-78) divides the mold into five big kinds. These five types of mold each have their own requirements, standards, and this kind of mold classification applies only to 400 tons or less of the injection molding machine mold. (a) type 101; Cycles up to 1 million times, for extremely high production. Choose the best mold material, so the price is very expensive. Requirements are as follows: (1) detailed tooling design information is required. (2) mold hardness requirements must have at least BHN280 (HRC 30). (3) die surface (including upper mold and lower die) must be at least in the range of BHN450 (48RC) hardness. All other accessories such as sliders and oblique top, top should use hard tool steel. (4) the ejector must be guided. (5) the side slip block must be equipped with a loss plate. (6) a temperature controller shall be installed on the upper die, the lower die, the slider or the die. (7) on the life of the die, the quality of the product is reduced and the injection cycle is increased due to the erosion of the cooling water pipeline. It is recommended that there be an insert or template for cooling water transport to prevent erosion. (8) all dies of this type shall be equipped with parting line locking mechanism. (b) type 102; Cycles up to 500 thousand times to 1 million times. For high yield products, the choice of better quality mold materials, expensive. Requirements are as follows: (1) detailed tooling design information is required. (2) mold hardness requirements must have at least BHN280 (HRC30). (3) the surface hardness of the upper die and the lower die should be in the range of BHN540 (HRC 48). All other functional parts shall be subjected to heat treatment. (4) a temperature controller may be installed on the upper die, the lower die, the slider or the die. (5) all dies of this type shall be equipped with