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塑料模具开发对材料有什么要求?

来源:http://www.sdlqmj.com/ 日期:2018-08-08

  具有足够的表面硬度和耐磨性:塑料模具的一般硬度通常在50-60HRC以下,热处理后模具应具有足够的表面硬度,以确保模具具有足够的刚性。模具在工作中由于填充和流动的塑料承受较大的压缩应力和摩擦,要求模具保持其形状的精度和尺寸精度的稳定性,以确保模具具有足够的使用寿命。模具耐磨性取决于钢的化学成分和热处理硬度,因此提高模具的硬度有利于提高其耐磨性。
    Sufficient surface hardness and wear resistance: the general hardness of plastic molds is usually below 50-60hrc. After heat treatment, the molds shall have sufficient surface hardness to ensure that the molds have sufficient rigidity. Because the filled and flowing plastics bear large compressive stress and friction, the mold is required to maintain the stability of shape accuracy and dimensional accuracy, so as to ensure that the mold has sufficient service life. The wear resistance of die depends on the chemical composition and heat treatment hardness of steel, so improving the hardness of die is helpful to improve its wear resistance.
    优良的机械加工性:大多数塑料模具,除了EMD加工外需要一定程度的切割和钳工修理。为延长切削刀具的使用寿命,提高切削性能,降低表面粗糙度,塑料模具钢的硬度必须适当
    山东模具制造厂家
    Excellent machinability: most plastic molds need a certain degree of cutting and fitter repair in addition to EMD processing. In order to prolong the service life of cutting tools, improve cutting performance and reduce surface roughness, the hardness of plastic die steel must be appropriate.
    良好的抛光性能:优良塑料制品,要求表面粗糙度小。用于此目的的钢材需要较少的材料杂质,组织细微均匀,无纤维方向,抛光不应出现点蚀或桔皮样缺陷。
    Good polishing performance: excellent plastic products, requiring small surface roughness. The steel used for this purpose needs less material impurities, fine and uniform structure, no fiber direction, and there shall be no pitting or orange peel like defects in polishing.
    良好的热稳定性:注塑模具部件的形状往往比较复杂,淬火后难以加工,应尽量使用良好的热稳定性,当模具加工热处理后由于线膨胀系数小,热处理变形小,由于尺寸变化率小,金相组织和模具尺寸稳定,可以减少或不再加工的温差,可以保证模具尺寸精度和表面粗糙度的要求。
    Good thermal stability: the shape of injection mold parts is often complex and difficult to process after quenching. Good thermal stability should be used as much as possible. After mold processing and heat treatment, due to small linear expansion coefficient and small heat treatment deformation, small size change rate and stable metallographic structure and mold size, the temperature difference can be reduced or no longer processed, It can meet the requirements of die dimensional accuracy and surface roughness.

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