Polyurethane springs
Elastomer elements for shock damping, return forces, and stripping in stamping dies.
Polyurethane elastomers are a mechanical alternative to coil and gas springs in applications where damping, progressive characteristics, and overload resistance are critical. They are mainly used as strippers, stops, damping elements, or return elements in stamping dies.
Polyurethane offers progressive force increase under compression, high shock absorption, and relatively quiet operation. The material is also resistant to oils and common operating fluids. Correct function depends on selecting hardness (Shore), working stroke, and operating temperature.
Polyurethane is not a “universal solution”—incorrect sizing leads to overheating, material degradation, and loss of characteristics. Therefore, it is important to work with real load data and the actual cyclic regime.
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Progressive characteristics
Smooth force increase under compression improves stability and shock damping.
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Overload resistance
Short-term overload typically does not lead to immediate destructive failure as with metal springs.
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Wide stock range
Hardness 70 – 95 Shore.
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High resistance to external influences and chemicals.
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