塑料模具的材料要求
Material Requirements for Plastic Moulds
塑料模具的工作條件與冷沖模不同，一般須在150°C-200°C下進行工作，除了受到一定壓力作用外，還要承受溫度影響?，F根據塑料成型模具使用條件、加工方法的不同將塑料模具用鋼的基本性能要求大致歸納如下:
The working condition of plastic die is different from that of cold punching die. Generally, it must work under 150 C - 200 C. Besides being subjected to certain pressure, it must also bear the influence of temperature. The basic performance requirements of steel for plastic moulds are summarized as follows according to the different working conditions and processing methods of plastic moulds.
1、足夠的表面硬度和耐磨性
1. Adequate surface hardness and wear resistance
塑料模的硬度通常在50-60HRC以下，經過熱處理的模具應有足夠的表面硬度，以保證模具有足夠蠕動泵 保定建筑設計 保定網站建設 保定網站制作 保定網絡公司 保定辦公家具 保定輕鋼別墅 的剛度。模具在工作中由于塑料的填充和流動要承受較大的壓應力和摩擦力，要求模具保持形狀的精度和尺寸精度的穩定性，保證模具有足夠的使用壽命。模具的耐磨性取決于鋼材的化學成分和熱處理硬度，因此提高模具的硬度有利于提高其耐磨性。
The hardness of plastic moulds is usually below 50-60 HRC. The heat treated moulds should have sufficient surface hardness to ensure that the moulds have sufficient stiffness. Because the filling and flowing of plastics must bear large compressive stress and frictional force in the work of the die, it is required to keep the shape accuracy and dimensional accuracy of the die stable, and ensure that the die has sufficient service life. The wear resistance of the die depends on the chemical composition of the steel and the hardness of heat treatment, so improving the hardness of the die is beneficial to improving its wear resistance.