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Dongguan Minz Rubber & Plastics Co., Ltd.
Add.: No.4, New Industrial Road, Shipai Tangwei, shipai town, Dongguan City
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Processing Strain Measures of Large Elastic Dust Seal
Release time:
2019-06-01 12:30
Source:
large elasticDust sealProcessing strain measures
Sealing rings in the sealing industry vary in size and size, with coin-like sealing rings and large Dongsheng elastic dust-proof sealing rings as large as tires. Observed from the structural action of the sealing ring and dustproof ring of large-scale sealing valves, the surface of each sealing ring has a certain radian and an elastic system from the material. The manufacturing process of the valve dustproof sealing ring is simulated by using a special template. The roughness of the dustproof sealing surface is required to be very high, and the surface is fine. The arc shape of the sealing surface is inspected during processing.
The sealing material of the large elastic dust-proof sealing ring uses fluorine rubber sealing characteristics, high temperature resistance, medium resistance and high hardness. The other is the valve dust ring combined with sealing metal material, which is difficult to form at one time in the production process. Therefore, Dongsheng seal to improve the processing process can better ensure the processing process needs, to avoid re-processing process:
1, in the use of special materials and tooling problems to ensure that the sealing surface processing accuracy, smooth

2, the production process, the need to do some special processing, such as the sealing ring to use metal material, then the combination of the valve and dust ring structure needs to be preheated. The sealing surface shall be made of hard metal;
3. In the process of processing and heat treatment, after surfacing alloy, the dust ring shrinks and deforms. When eliminating thermal stress, tools are used to enter the furnace together for heat treatment. In this way, the upper part after releasing stress basically maintains its original shape and can meet the processing requirements after slight correction.
4, in the process, the temperature is maintained, in addition to the sealing surface of the rest of the size to turn the finished product size, check the template alloy surface, in order to ensure the radian of the sealing surface. In addition, a small amount of shrinkage pores may appear on the surface, and repair welding should be used at this time.
5, in the welding metal material (alloy) processing process, the pre-heat treatment to reduce the generation of stress, the sealing surface to be grinding production, subsequent grinding. At the same time, if hot cracks occur during welding of metal materials, the method of fixing the base with a tire and symmetrical welding is used to balance the thermal stress.
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