Harmful Effects of Improper Heat Treatment Process of Plastic mold


In the process of plastic mold processing, cracks or deformation, easy oxidation and decarbonization of the surface are mainly due to the failure of the mold. The main reason for the failure of plastic mold is the improper heat treatment process, such as the improper selection of heat treatment process parameters such as heating temperature, holding time, cooling speed and so on.

First of all, it is about the influence of oxidation and decarbonization, mainly because die quenching is stopped at high temperature, but it can not be strictly controlled. In addition, after decarburization of the exterior surface of the mold, due to the difference between the inner and outer layers of the structure, there is a large structural stress in cooling, which leads to quenching cracks.


The second is about the speed of heating. Because the die steel contains more carbon and alloy elements and has poor thermal conductivity, the heating speed can not be too fast, so it should be stopped slowly to avoid the deformation and cracking of the mold. When quenching in air furnace, in order to avoid oxidation and decarbonization, packing maintenance heating is adopted. At this time, the heating rate should not be too fast, and the heat transmission should be slower.


If the heating speed of the mold is fast and the heat permeability is fast, great thermal stress will be generated inside and outside the mold. If it is not well controlled, such as deformation or crack, it is very easy to occur. Preheating or slowing down the heating rate is necessary for prevention.



JasonMould Industrial Company Limited, established in 2010, is a leading China mold factory. JasonMould specializes in plastic mould production for household appliances, medical equipments, electronic equipments, safety equipments as well as monitoring system.

The company has over 15000 square metres factory. With plastic injection tooling divisions possessing different machinery and expertise, JasonMould offers tools from small and precise mobile phone parts to as big as automotive parts. Our tools are mainly exported to U.S.A., Europe, Japan and UK. JasonMould’s diversification strategy and full service has won compliment from customers all over the world.

Our mission is to provide our customers high quality moulding products and services. We aim to exceed our customers’ expectations of pricing, quality and on-time delivery. To achieve our mission, JasonMould:

  • Commits to continually improve employee skills and efficiency,
  • Provides our employees a clean and safe working environment,
  • Upgrades machine technology and support equipment through a strict maintenance program, and
  • Maintains customers’ tooling to its highest peak of performance

For more about China injection molding cost,please visit https://www.jasonmolding.com/

Inquiry Contact:

Contact person: James Yuan

Company name: JasonMould Industrial Company Limited

Address: LongGang Village,LongXi Town,BoLuo County,HuiZhou City,GuangDong Province, China

Telephone: 86-752-6682869

Email: [email protected]

Website: https://www.jasonmolding.com

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