With the rapid development of China's plastic industry, plastic products have been widely used in all aspects of our lives, such as commodity packaging, building materials, auto parts and so on. In recent years, the demand for precision plastic products is increasing, and the market potential is huge.

相应地，我国塑料模具的市场也不断扩大，对于模具制作工艺的要求也不断增加。热处理工艺是塑料模具制作中的关键环节，与塑料模具的生产质量和使用性能密切相关。

Accordingly, China's plastic mold market is also expanding, and the requirements for mold manufacturing process are also increasing. Heat treatment process is a key link in the production of plastic mold, which is closely related to the production quality and performance of plastic mold.

1、塑料模具的精度

1. Precision of plastic mould

热处理过程中产生的变形是导致塑料模具精度降低的主要问题。具体来说，在模具热处理时，由于各个面的加热速度和冷却速度不同，使各个面出现温度差。导致模具出现体积膨胀不均匀的现象。引发模具组织转变不均匀。因此产生组织应力和热应力。当热处理中产生的残余应力大小超过模具的承受范围时，就会导致模具发生变形，使模具精度降低、甚失效。

The deformation in the process of heat treatment is the main problem that leads to the decrease of plastic mold precision. Specifically, in the mold heat treatment, due to the different heating speed and cooling speed of each surface, the temperature difference of each surface appears. It leads to the uneven expansion of the mold. The results show that the microstructure transformation is uneven. Therefore, there are structural stress and thermal stress. When the residual stress produced in heat treatment exceeds the bearing range of the die, the die will be deformed, and the accuracy of the die will be reduced or even fail.

2、塑料模具的强度

2. Strength of plastic mould

塑料模具的热处理工艺是决定其强度大小的重要因素。具体来说，当热处理工艺的选择不合理，热处理过程的操作不规范，或是热处理设备存在散障时，都会降低塑料模具的强度，导致生产的模具不合格。因此，厂家在生产塑料模具时，必须按照模具的不同强度要求，根据不同的模具用材，采用相应的热处理工艺。

The heat treatment process of plastic mold is an important factor to determine its strength. Specifically, when the selection of heat treatment process is not reasonable, the operation of heat treatment process is not standardized, or there are scattered obstacles in heat treatment equipment, the strength of plastic mold will be reduced, resulting in unqualified production mold. Therefore, when producing plastic mold, the manufacturer must adopt the corresponding heat treatment process according to the different strength requirements of the mold and the different mold materials.

3、塑料模具的使用寿命

3. Service life of plastic mould

塑料模具的热处理工艺也是决定其使用寿命的关键因素。具体来说，当热处理工艺的选择不合理或操作不规范时，会引发模具在热处理过程中产生组织结构不合理和晶粒度超标等问题，使得塑料模具的韧性下降，抗冷热疲劳性降低，抗磨损性变差，导致模具的整体性能降低，影响模具的使用寿命。

The heat treatment process of plastic mold is also the key factor to determine its service life. Specifically, when the selection of heat treatment process is unreasonable or the operation is not standardized, it will lead to the problems of unreasonable structure and excessive grain size in the process of heat treatment, which will reduce the toughness of the plastic mold, reduce the cold and hot fatigue resistance and wear resistance, reduce the overall performance of the mold and affect the service life of the mold.

4、塑料模具的制作成本

4. Production cost of plastic mould

塑料模具的生产成本与热处理工艺密切相关。具体来说，当模具采用了不恰当的热处理工艺或操作不规范时，会导致模具的耐磨性、耐腐蚀性、抗冷热性，韧性，硬度和强度等性能降低，甚导致模具出现变形、失效。因此，采用合理的热处理工艺能够提高塑料模具的生产质量，从而降低模具的生产成本，提高生产厂家的经济效益。

The production cost of plastic mold is closely related to the heat treatment process. Specifically, when the mold adopts the improper heat treatment process or the operation is not standardized, the wear resistance, corrosion resistance, cold and hot resistance, toughness, hardness and strength of the mold will be reduced, and even lead to the deformation and failure of the mold. Therefore, the reasonable heat treatment process can improve the production quality of plastic mold, reduce the production cost of mold, and improve the economic benefits of manufacturers.