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The tension and compression springs are actually located on opposite sides of the spring range. Tension springs are mainly used to fix two components together, and Plastic Compression Springs are best suited to keep the components from touching from the beginning. Both use coil designs to improve elasticity and strength, but they work under two different principles of elastic potential energy.

　　Tension springs are usually made of smaller gauge wires and are wound very tightly. Both ends may have loops or hooks for connection purposes. Springs on children’s trampolines are the main example of tension springs. Each spring is fixed on a canvas and a metal support frame. When unloaded, the tension spring remains compact and unstretched. When the child jumps on the canvas, each spring will bear part of the load, and the coil will open.

　　At this point, when the coil stretches to its limit, the spring contains the greatest potential energy. When the spring is forcibly returned to its original position, all the energy is released and the child is thrown into the air. This is the main function of a tension spring. It allows external forces to generate tension but then uses potential energy to pull the parts back together. The greatest damage a tension spring can withstand is beyond its natural limit. Once the coil of the tension spring is damaged, it cannot return to its original tension state. Extension springs usually have loops or loops at each end to make it easier to connect to the component.

　　The working principle of compression springs is different. They are usually made of larger gauge wire and are not wound in tight coils. Each end of the compression spring may have a ring supporting its load. Children's spring dolls or car shock absorbers are examples of compression spring technology. When in the extended position, the spring is naturally at rest. When the child jumps on the pogo stick, the spring inside the toy is pushed down. Children can only apply a certain amount of force to the spring, so it will only contain a similar amount of potential energy. When the compression springs are pushed together, it contains the greatest potential energy. The spring returns to its natural position and releases energy along the way. Through this recoil action, the child is pushed into the air.

　　A smaller example of a compression spring is called a "Bellet spring" or a "Bellet washer." The gasket is actually a disk with a noticeable center of curvature. When force is applied to the gasket, the gasket begins to flatten and become stronger. Engineers often use Belleville springs in various combinations to replicate the quality of other spring systems. For example, when two parts of a machine need to be suspended or to protect them from unnecessary shocks, these washers are usually used.

　　Compression springs can also be found in mattresses and seismic foundations. The main problem with the compression spring surface is the possibility of bending under pressure. If the load on the compression spring is uneven, the coil may bend and fail. Therefore, many compression springs are protected by flexible but strong dust boots made of rubber, cloth or plastic. In order to avoid major failures, the total length of the compression spring must be considered. The length of the compression spring (if not guided) must be controlled to ensure that it will not bend or bend. Compression springs usually have flat ends, so they are parallel to each other to ensure uniform force throughout the stroke.

　　Extension springs and compression springs may have different applications, but each spring demonstrates the utility of potential energy and the many uses of coil design.

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