Silicone o-ring type as soon overflow edge manufacturers, in order to look neat and beautiful, silicone o-rings must be removed edges, this process often called trimming. For trimming the size requirement is accurate, neat appearance. In the actual production. Trimming products are often time-consuming, consuming work, strict requirements for the product, when trimming a little careless waste of time that could be treated with caution. In general, the smaller the dimensions of the product, the more complex configurations, the higher the difficulty of trimming, the more waste. Trimming silicone o-rings into the manual, mechanical and refrigeration and other categories: 1. Manual trimming. Operator hand tools, along the outer edge of the product, the overflow edge to gradually repair. This is the most primitive way. Low efficiency, quality assurance is difficult, especially for small size, high precision O-ring is difficult to do a thorough, in the net, and it is easy to damage the product and the connecting portion of the body and the overflow edge. Often leaving teeth marks, nicks, leaving oil spills, leaks and other problems affecting the seal of the aftermath. In addition. Hand trimming operating proficiency dependence is also very prominent. 2. Mechanical trimming. In order to improve efficiency and quality, there has been a mechanical trimming. Common is dedicated with a rotating blade electric trimmer. The height of the blade used to match demand and product size. If the inner and outer edges of the product have overflow edge. Can be designed as a double-edged, more cutting edge. In order to achieve a complete. Mechanical trimming precision than manual trimming, efficiency has improved several times, especially in a multi-cavity mold for the product concerned, in accordance with the arrangement and distribution of products, designed to match the tool. Until after the product out of the mold. Can put a full-page, once completed punching. Under heating with, one can repair dozens. The key is punching the temperature must be controlled, prevent the excessive adhesion. 3. Frozen trimming. The vulcanization good product together with scrap, were in addition to the side in freezing conditions. The technology was developed by Japan's Showa 昭凌 carbonated and domestic joint invention improves the precision for decades, with the improvement of the media choose frozen, updating and mechanical action, frozen trimming silicone o-rings also experienced several generations of improvements, maturity and improve work efficiency and process quality has significantly improved. Since this time the O-ring is not in contact with oxygen, as occurs in dynamic sealing state. If the O-ring assembled properly, and the appropriate conditions of use, typically less prone to rolling, or distorted in a reciprocating motion, because the area of ??contact with the O-ring groove is greater than the frictional contact area on the sliding surface, and silicone o ring the original manufacturer's own ability to resist twisting can stop. Friction distributions also tend to keep the O-ring is stationary in its groove, because the static friction is greater than sliding friction, and surface roughness of the trench is generally not as good as the sliding surface roughness.