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2022
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08
The application scope and advantage of wear-resistant O-ring
Author:
The choice of wear-resistant O-ring hardness is very important, for example, the water pump turbine hardness of 70(bank) seal ring, often fall off, even transverse cut off, the use of 85~90(bank) seal ring, the effect is ideal.
First, wear resistant O-ring dressing
The unvulcanized O-ring rubber material is a viscous fluid under high temperature and high pressure, but in the forming vulcanization stage, the rubber material quickly fills the mold cavity, the excess part (in order to prevent the lack of rubber material, the rubber material filled in the mold cavity to maintain a certain excess) overflow and vulcanization, thus forming an overflow (also known as waste edge and flying edge). Once the overflow is formed, it is removed to make the appearance neat and beautiful. This process is often referred to as trimming. Trimming requirements are accurate size, clean appearance. In actual production. Finishing products is usually time-consuming and laborious. For more strict requirements of the product, the slightest mistake in the dressing may lead to waste, must be cautious. Generally speaking, the smaller the product size, the more complex the configuration, the higher the edge cutting difficulty, the more waste products.
Two, wear-resistant O-ring trimming is divided into traditional manual, mechanical and frozen three categories
1, manual trimming, operator holding the tool, gradually cut off the overflow along the outer edge of the product. This is the original method. Low efficiency, quality is difficult to ensure, especially for small size, high precision O-ring, difficult to clean, easy to damage the product body and the overflow side of the connection. Often leave teeth marks, gaps, resulting in oil leakage, air leakage and other seal sequelae. In addition, manual edging is also highly dependent on operational proficiency.
2, mechanical trimming, in order to improve work efficiency and quality, the emergence of mechanical trimming. Common is a special electric edging machine with a rotating blade. The blade used should have a highly developed match with the size of the product. If the inner and outer edges of the enterprise product have overflow edge. Can be designed into a double-edged, multi-cutting edge, in order to achieve a complete. The machining precision of mechanical trimming technology has exceeded the traditional manual trimming, and the efficiency is also likely to multiply and improve, especially for the product market of a mode and cavity, you can directly according to the arrangement and distribution of your own products, designed to match the tool. After the product is moulded. Can be set on the whole plate, a successful completion of punching. With the cooperation of heating, it can repair dozens of them at a time. The key is the punching temperature we learn to master well to prevent adhesion after the cost is too high.
3, frozen pruning, vulcanized finished products and waste edges should be removed under freezing conditions. Over the decades, with improvements in selection, replacement, and mechanical action, freeze finishing has also evolved over the generations, becoming more mature and refined, with significant improvements in work efficiency and processing quality.
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Shanghai Lingsheng Seals Co., LTD
Telephone:021-54419691
Phone:13671848590
Fax:021-39650919
Address: No. 611 Yuetai Road, Songjiang District, Shanghai
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Contact us
Shanghai Lingsheng Seals Co., LTD
Telephone:021-54419691
Phone:13671848590
Fax:021-39650919
Address: No. 611 Yuetai Road,
Songjiang District, Shanghai
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