Injection molding provides a sound solution for creating extension springs but its use can vary. Projects differ based on factors such as material use and operational conditions influencing the design. For instance, making a spring for high-temperature use requires specific material choices for a robust design. Likewise, a spring for a device used in high-frequency movements calls for a thorough fatigue life review. This article will cover these elements to aid in your spring design and selection process for better product safety and quality.

Calculating Deflection in Plastic Extension Springs

Deflection in the context of injection molded plastic extension springs is the measure of variation in the spring's length when a load is exerted on it. This can be calculated by finding the difference in length before and after the load application. For example, a spring measuring 10cm initially, which then extends to 15cm under a load, exhibits 5cm deflection. Different plastic materials will exhibit different deflection characteristics due to their inherent properties. Therefore, material selection directly impacts the deflection calculation. Knowledge of the stress response of the chosen material and its effect on deflection is necessary for designing an extension spring that aligns with the requirements of its intended application.

Differences Between Traditional and Injection Molded Springs

Requirements for the Injection Molding


To mold extension springs through injection, understanding multiple factors is required. Skills such as these help engineers to create durable and flexible springs on a consistent basis. Injection molding has become a significant method in production. Therefore, engineers should understand this process well. This guide provides engineers with basic knowledge on how to inject mold extension springs. Using this guide as a starting point could help them enhance their skills in current production technologies.