Product Overview
Heat-Resistant Performance for Injection Molds
Our Plastic Mold Spring is made specifically for injection molds and plastic forming tools. Plastic molds operate at high temperatures, often over 100℃. They also have short cycle times and frequent opening and closing. Our product uses heat-resistant alloy steel. It works in temperatures from -40℃ to +220℃. In these conditions, our product maintains stable force with very low decay. We have 28 years of experience in developing springs for challenging thermal environments.
Built to Resist Heat and Corrosion
We put significant effort into improving our plastic mold spring. We optimized the material for high-temperature performance. We also improved the surface finish to resist corrosion from mold release agents and plastic gases. Our product benefits from our overall technical strength. We have achieved fatigue test results of 58.4 million cycles. We also hold a patent for a custom Huawei torsion spring. In the printing and die-cutting industries, our market share is over 85% and 75%. A good plastic mold spring keeps your mold working reliably through hundreds of thousands of cycles.

Key Specifications
|
Parameter |
Specification |
|
Material |
Heat-resistant Alloy Steel / SUP series |
|
Outer Diameter |
6mm – 60mm (Customizable) |
|
Free Length |
10mm – 500mm (Customizable) |
|
Operating Temperature |
-40℃ ~ +220℃ |
|
Load Class |
Light / Medium / Heavy (optional) |
|
Surface Finish |
Electrophoretic / Anti-rust Spray |
|
Corrosion Resistance |
Suitable for mold release agents and gases |
|
Fatigue Life |
≥ 1 million cycles within rated stroke |
Custom Development and Technical Support
We support full customization for every plastic mold spring. We can recommend the right material and load class based on your mold's working conditions. We have no MOQ requirement. Sample validation is available before mass production. Our engineering team provides free technical support and selection advice. We use three-layer protective packaging for exports. We support EXW and FOB terms from Ningbo or Shanghai. We also assist with DHL or FedEx shipping. We accept third-party inspections like SGS or BV.
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