The trimming of O-rings is divided into three categorie […]
The trimming of O-rings is divided into three categories: manual, mechanical and frozen:
1. Manual trimming. The operator holds the tool and gradually repairs the overflow along the outer edge of the product. This is the most primitive method. The efficiency is low and the quality is difficult to guarantee. Especially for the O-rings with small size and high precision requirements, it is difficult to be thorough and clean, and it is easy to damage the connection between the product body and the overflow. Tooth marks and nicks are often left, leaving oil and air leaks and other after-effects that affect the seal. In addition. The dependence of manual trimming on operational proficiency is also prominent.
2. Mechanical trimming. In order to improve efficiency and quality, mechanical trimming has appeared. The most common one is a dedicated electric trimming machine with a rotating blade. The blade used must match the height of the product size. If the inner and outer edges of the product have overflow. It can be designed as double-edged and multi-edged. To achieve one-time completion. The machining accuracy of mechanical trimming exceeds that of manual trimming, and the efficiency is also doubled. Especially for a multi-cavity product with one mold, a matching tool can be designed according to the arrangement and distribution of the product. After the product is out of the mold. The whole page can be put on, and the punching can be completed at one time. With the cooperation of heating, dozens of them can be repaired at a time. The key is that the punching temperature must be controlled well to prevent adhesion after being too high.
3. Frozen trimming. The vulcanized finished product and waste edges are removed under freezing conditions. This technology is jointly invented and improved by Showa Carbonic acid in Japan and Zhaoling Precision in China. Over the past decades, with the selection and replacement of freezing media and the improvement of mechanical action, the freezing trimming has also undergone several generations of improvements, and it has become more mature and perfect. , Work efficiency and processing quality have been significantly improved.