Due to the high working temperature and pressure of the die, some plastic materials are easy to wear and corrode with the die surface, and sometimes they will be collided by demoulding. There are three main failure modes:

（1）表面磨损

(1) Surface wear

由于塑料中增强树脂填料，对模具型腔表面产生冲刷、磨损和腐蚀作用,从而影响到模具型腔表面粗糙度值升高,尺寸超差。

Due to the reinforced resin filler in the plastic, the surface of the mold cavity is scoured, worn and corroded, which affects the increase of the surface roughness of the mold cavity and the out of tolerance of the size.

（2）变形

(2) Deformation

模具局部产生塑性变形，导致表面发生凹陷、皱纹、麻点和棱角堆塌等损坏。

Plastic deformation occurs locally in the die, resulting in damage such as depression, wrinkle, pitting and corner collapse on the surface.

（3）断裂

(3) Fracture

由模具局部应力集中导致的断裂现象。

Fracture caused by local stress concentration of die.

2.模具的制造和使用要求

2. Requirements for mold manufacturing and use

塑料模具对材料在强度和韧度上的要求低于冷作模和热作模，根据其失效形式和工作要求，其基本性能要求归纳为：

The strength and toughness requirements of plastic molds are lower than those of cold working molds and hot working molds. According to their failure forms and working requirements, the basic performance requirements are summarized as follows:

（1）足够的耐磨性

(1) Adequate wear resistance

由于表面磨损是模具的主要失效形式之一，因此模具应当有足够的硬度，以保证模具的耐磨性，保证模具的寿命。通常需要选择合适的材料和恰当的热处理方法来满足硬度的要求。但当硬度达到一定值时，硬度对耐磨性的提高作用就不明显。

Since surface wear is one of the main failure forms of the die, the die should have sufficient hardness to ensure the wear resistance and service life of the die. It is usually necessary to select appropriate materials and appropriate heat treatment methods to meet the hardness requirements. However, when the hardness reaches a certain value, the improvement effect of hardness on wear resistance is not obvious.

（2）减少热处理变形影响

(2) Reduce the effect of heat treatment deformation

由于注塑零件形状往往比较复杂，塑料模具在淬硬后很难加工，有时甚无法加工。为了提高硬度，需要进行热处理。要采取适当的措施来减低热处理变形的影响，对于需要在热处理后进行加工的模具，应选用热处理变形小的材料。

Because the shape of injection molded parts is often complex, plastic molds are difficult to process after hardening, and sometimes even impossible to process. In order to improve the hardness, heat treatment is required. Appropriate measures should be taken to reduce the influence of heat treatment deformation. For the molds that need to be processed after heat treatment, the materials with small heat treatment deformation should be selected.

（3）优良的切削加工性能

(3) Excellent cutting performance

塑料模具的制造中切削加工成本常占大部分，为了延长切削刀具的使用寿命，保证加工表面质量，要求模具材料具有良好的切削加工性，对于预硬性材料，要求淬火后也有好的加工性。

In the manufacture of plastic mold, the cutting cost often accounts for the majority. In order to prolong the service life of cutting tools and ensure the machining surface quality, the mold material is required to have good machinability. For pre hardening materials, it is required to have good machinability after quenching.

（4）良好的抛光性能和刻蚀性

(4) Good polishing performance and etchability

为获得高品质的塑料制品，模具内型腔的表面需要进行抛光以减小表面粗糙度值，为了保证模具具有良好的电加工性和镜面抛光性，花纹图案刻蚀性，模具钢应当是材料的纯洁度高，组织细微、均匀、致密。

In order to obtain high-quality plastic products, the surface of the cavity in the mold needs to be polished to reduce the surface roughness value. In order to ensure that the mold has good electrical machinability, mirror polishing and pattern etching, the mold steel should be high purity, fine, uniform and dense structure.

以上就是为大家介绍的有关济南模具钢的详细介绍,希望对您有所帮助.如果您有什么疑问的话,欢迎联系我们.我们将以的态度,为您提供服务https://www.jnqhmj.com

The above is the detailed introduction of Jinan die steel. I hope it will help you If you have any questions, please contact us We will provide you with professional service https://www.jnqhmj.com