The service life of second-hand injection molding is affected by many factors (such as material, usage history, maintenance status, etc.). The comprehensive data analysis is as follows:
1. Theoretical life range
New mold benchmark
The design life of a new injection mold is usually 300,000-500,000 times , and high-end materials (such as SKD61) can reach 500,000-1 million times;
However, the actual remaining life of a second-hand mold needs to be converted according to the number of times it has been produced. For example:
- P20 steel new mold is about 100,000-200,000 times → if it has been produced 80,000 times → the remaining is about 20,000-120,000 times;
- 718 steel new mold is about 200,000-500,000 times → if it has been produced 300,000 times → the remaining may be close to scrap.
Industry differences
- Automobile/precision parts (such as large or precision injection molds): Usually the remaining life is related to the vehicle model cycle (about 5-8 years or 100,000-700,000 times);
- Ordinary industrial products (such as daily necessities): The remaining life may be shorter (such as 5-10 years or less than 300,000 times)
2. Key influencing factors
Material and process
- P20 steel usually has a lower remaining life (about 100,000-200,000 times);
- SKD61/H13 steel has stronger wear resistance (up to 800,000-1 million times);
- Surface treatment (such as anti-corrosion coating) can extend the remaining life.
Maintenance and loss
- Well-maintained second-hand molds (such as regular cleaning/lubrication) may retain 70%-80% of the original life;
- Second-hand molds that lack maintenance (such as rust/roughening) may have a remaining life of less than 50%
