What are the methods for trimming rubber O-rings?

1. Manual trimming. The operator holds the tool, along the outer edge of the product, and gradually repairs the overflow edge. This is the most primitive method. The efficiency is low and the quality is difficult to guarantee, especially for the O-ring with small size and high precision requirements, it is difficult to be completely and clean, and it is easy to damage the connection between the product body and the overflow edge. Often, tooth marks and gaps are left, leaving oil leakage, air leakage and other residual problems that affect the sealing. 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. Common are dedicated electric trimmers with rotating blades. The blade A used should be highly matched to the size of the product. If the product has overflow on the inner and outer edges. 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 products with one mold and multiple cavities, matching tools can be designed according to the arrangement and distribution of the products. After the product is out of the mold. It can be put on the whole page, 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 well controlled to prevent sticking after being too high.

3. Freeze trimming. The vulcanized finished product and the waste edge are removed under freezing conditions. The technology is jointly invented and improved by Japan's Showa Carbonic Acid and China's Zhaoling Precision. Over the past few decades, with the selection and replacement of refrigeration media and the improvement of mechanical actions, frozen trimming has also undergone several generations of improvement, becoming more mature and perfect. , work efficiency and processing quality have been significantly improved.