Rubber and plastic materials are all high polymers that exist in different phases at different temperatures. From a phase perspective, the material merely undergoes changes in mechanical states. When the material is subjected to low temperatures, its state changes; when it returns to normal temperature, all its properties are restored. The cryogenic trimming machine utilizes the low-temperature freezing effect of liquid nitrogen to make rubber and plastic materials脆ify. In this state, a high polymer-pellet is高速喷射 at the product's weak areas to remove the burrs from rubber and plastic products, as well as aluminum and zinc alloy products, with high quality. The physical properties of rubber and plastic materials harden,脆化, and crystallize as the temperature drops. Once the temperature decreases, the materials begin to harden, and below the脆化 temperature, they will not deform or damage. Upon returning to normal temperature, their physical and chemical properties remain unchanged.