The thermal conductivity of mold steel determines that in the process of injection molding, the heat of plastic can be exported to the environment at the speed of several blocks. The inherent performance parameters of the material itself are used to describe the thermal conductivity of the material. So, how to shorten the injection cycle of mold steel? Today, die steel is a comprehensive introduction.

在注塑生产过程中，一般来讲冷却阶段所占据的时间会在整个注塑周期的50%以上，因此，冷却阶段往往会成为周期优化的关注领域。

In the injection molding process, generally speaking, the cooling stage takes up more than 50% of the whole injection molding cycle. Therefore, the cooling stage often becomes the focus of cycle optimization.

一般所采取的方法主要有随形3D打印水路，铍铜镶嵌和采用高导热系数的模具钢等等。本文关注的为高导热模具钢在缩短注塑周期方面的应用。

Generally, the main methods adopted are 3D printing waterway, beryllium copper inlay and mold steel with high thermal conductivity, etc. This paper focuses on the application of high thermal conductivity die steel in shortening injection cycle.

模具钢的导热系数决定了在注塑过程中，塑料的热量能够以多块的速度被导出到环境当中去，导热率K是材料本身的固有性能参数,用于描述材料的导热能力，单位W/(m?K)。数值越高，钢材的导热能力越强。

The thermal conductivity of mold steel determines that in the process of injection molding, the heat of plastic can be exported to the environment at the speed of several blocks. The thermal conductivity K is the inherent performance parameter of the material itself, which is used to describe the thermal conductivity of the material, in w / (M? K). The higher the value is, the stronger the thermal conductivity of steel is.

常用的P20模具钢的导热系数为31.5 W/(m?K)。而铍铜的导热系数可以做到106W/(m?K)以上，为P20模具钢的3倍以上，也就是说在同样的时间之内，铍铜能够导出的热量是P30的3倍。

The thermal conductivity of P20 die steel is 31.5 w / (M? K). The thermal conductivity of beryllium copper can be more than 106W / (M? K), which is more than three times that of P20 die steel. That is to say, the heat output of beryllium copper is three times that of P30 in the same time.

这样的性能使得近年来铍铜在注塑模具内的应用逐渐增多。但是铍铜材料存在昂贵、耐磨损性差、韧性不足、尺寸受限等限制，其应用还比较受限。

Such excellent properties make the application of beryllium copper in injection mold gradually increase in recent years. However, beryllium copper materials have some limitations, such as high price, poor wear resistance, insufficient toughness, limited size and so on.