An essential factor in any plastic injection molding project is the mold's lifespan. Injection molds are an investment, so it's vital to know how long they will last.
Factors that Influence Mold Durability
The lifespan of the mold consists of the maximum number of cycles it endures. The surface area of a mold is generally the most delicate part and will show wear and tear first. Various factors determine the rate at which wear occurs. The lifespan of an injection mold depends on inspection, maintenance, structure, environment, coating the mold, and operating under proper conditions.
1. Environment
The lifespan of an injection mold can be significantly affected by its environment. A clean environment gives mold a longer lifespan. Harsh and unclean environments impact the quality of the parts produced, and molds in cleaner conditions last longer.
2. Materials Used to Build the Mold
Plastic mold materials weaken and wear down over time, and the materials used to construct an injection mold affect its lifespan.
3. Maintenance
Proper maintenance and maintaining the moisture levels inside extend the mold’s life. Regularly inspecting the mold promotes longevity.
Maintaining service records of the plastic injection mold repairs is beneficial, as this may help detect issues if defects appear and will aid in future predictions of maintenance needs.
4. Injection Molding Process
The lifespan of an injection mold may also be determined by when it is used during the injection molding process. Slow cycle times and appropriate clamp force aid in the mold's durability. Settings that are too fast, pins prematurely decoupled, or vents opened before the scheduled time may lead to errors. Not only can excessive clamp force cause problems and deformations, but temperature control during the process is also a key to longevity.
How to Keep Injection Molds Running Longer
You can maintain your injection molds and extend their lifespan by following the proper maintenance procedures.
Use the correct mold size: The mold should be the appropriate size for the part to function correctly.
Use the correct operating conditions: The mold must be used in the area and processes intended.
Clean the mold regularly: Maintenance includes periodic cleaning, finishing, coating, and greasing of the mold. The maintenance frequency is determined by the resin used in the injection process.
Inspect the mold periodically: The mold should be regularly visually inspected.
Apply coatings: Coatings can prevent wear and damage to the mold. Mold coatings minimize downtime and enhance mold performance. Carbon-based coatings are prevalent due to their lubricating qualities.
By following the proper procedures and using suitable materials, you can extend the life of your plastic injection mold.