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随着塑料制品的形状日趋复杂,尺寸精度、粗糙度要求日益提高的总趋势,对模具钢提出了更高的要求。沿用45、T8A、CrWMn等钢种制造的模具,在精加工后不进行热处理,虽然能保证模具精度,但模具处于退火或正火状态,硬度和强度都很低,耐磨性能也差,从而导致模具寿命低,产品零件外观质量差的现状。从我们引进生产的西门子公司113话机的塑压件表面粗糙度差于进口件的事实,明显地看出,关键在于模具材料。
With the increasingly complex shape of plastic products, dimensional accuracy, roughness increasing demand for the general trend of higher demand for the mold steel. Follow the 45, T8A, CrWMn and other steel molds, after finishing without heat treatment, although to ensure the accuracy of the mold, but the mold is in the annealed or normalized state, the hardness and strength are low, wear resistance is poor, and thus Lead to low mold life, the appearance of poor quality parts of the product status. From the fact that we have introduced the production of Siemens 113 telephone plastic parts surface roughness worse than the imported parts, it is clear that the key lies in the mold material.