The elastic yellow of precision compression die can be divided into pressure spring, tension spring and bending spring yellow according to the bearing characteristics. According to the appearance can be divided into: vortex spring, die casting mold rectangular spring, ring elastic yellow, etc.; According to the production process can be divided into cold rolled coil elastic yellow, hot rolled coil elastic yellow; According to the production of raw materials can be divided into metal material yellow, plastic bullet yellow, rubber shock absorber and other raw material yellow.

The key functions of elastic yellow are:

1, the control of mechanical equipment fitness exercise, commonly have clutch control elastic yellow and gas turbine valve spring, etc.;

2, digestion and absorption of vibration and impact kinetic energy, commonly cloth sofa seat elastic yellow, high-speed rail under the buffer elastic yellow and vibration absorber yellow;

3, storage and output of kinetic energy as a driving force, commonly for clock shot yellow, gun shot yellow, etc.;

4, force measuring components, force measuring device, etc. Elastic yellow also has the function of measurement, calibration, driving, caching, pronunciation and compression.

The pressure spring is the key to bear force when working. The precision tensile die spring has the effect of resisting and caching working pressure, which is widely used in mechanical equipment. The spring key assumes the tension resistance in the work, and is used for the calibration of the organization. It is widely used in mechanical equipment.

The key is to bear torsion torque when working. Precision torsion die spring has the characteristics of resisting distortion, which is often seen in the clamping of tissues. Plate spring key in the work of bearing force, the key to shock absorption, common in the suspension of cars, large tractors.

The key of the coil spring is to store kinetic energy when working. It is widely used in clocks, instruments and experimental instruments. The key is bearing capacity in the work, which is used more in heavy machinery and equipment with great impact force.