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Sealing element and preparation method thereof
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A technology for seals and semi-finished products, applied in the field of seals and their preparation, can solve the problems of seal density, low hardness, product instability, short service life, etc., and achieve the effect of low plasticity, good hardness and long service life
Pending Publication Date: 2020-08-04
浙江神舟密封件有限公司
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Problems solved by technology
However, the density and hardness of the seal obtained by the above preparation method are low, and the plasticity is high. In practical applications, the product has the disadvantages of instability and short service life.
Method used
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Embodiment 1
[0018] A seal, in parts by weight, consists of the following raw materials: 60 parts of TFM, 15 parts of PI, 10 parts of carbon fiber powder, 10 parts of molybdenum disulfide powder, and 5 parts of PTFE reinforcing agent.
[0019] Such as figure 1 As shown, the sealing member of this embodiment is made as follows:
[0020] 1) Put TFM, PI, carbon fiber powder, molybdenum disulfide and PTFE reinforcing agent into the mixer, and fully stir for 20 minutes to obtain the mixed powder modified PI;
[0021] 2) Put the modified PI into the pre-designed mold;
[0022] 3) Place the mold with modified PI under the hydraulic press for die casting to obtain the semi-finished product of the seal;
[0023] 4) Put the semi-finished product of the seal into the sintering furnace and burn for 14 hours;
[0024] 5) Put the sintered seal semi-finished product into the pre-designed mold again, and die-cast with a hydraulic press;
[0025] 6) Put the semi-finished seal product obtained in step 5) into the sint...
Embodiment 2
[0031] A seal, in parts by weight, consists of the following raw materials: 55 parts of TFM, 10 parts of PI, 5 parts of carbon fiber powder, 5 parts of molybdenum disulfide powder, and 3 parts of PTFE reinforcing agent.
[0032] The preparation method of the seal is the same as the preparation method of the first embodiment, and the obtained seal has a Shore hardness of 76D and a density of 2.75g / cm 3 , Tensile strength 17.3MPa, Flexural strength 12.5MPa.
Embodiment 3
[0034] A sealing element, in parts by weight, consists of the following raw materials: 65 parts of TFM, 20 parts of PI, 15 parts of carbon fiber powder, 15 parts of molybdenum disulfide powder, and 7 parts of PTFE reinforcing agent.
[0035] The preparation method of the seal is the same as the preparation method of the first embodiment, and the obtained seal has a Shore hardness of 74.6D and a density of 2.76g / cm 3 , The tensile strength is 16.9MPa, and the bending strength is 12.4MPa.
[0036] The above-mentioned hydraulic press was purchased from Ruian Huawei Hydraulic Press Machinery Factory, and the sintering furnace was purchased from Taizhou Jinchi Power Equipment Co., Ltd.
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Abstract
The invention relates to a sealing element and a preparation method thereof, and the sealing element comprises the following raw materials by weight: 55-65 parts of TFM, 10-20 parts of PI, 5-15 partsof carbon fiberpowder, 5-15 parts of molybdenum disulfide powder, and 3-7 parts of a PTFE reinforcing agent. The preparation method comprises the following specific steps: 1) putting TFM, PI, carbonfiber powder, molybdenum disulfide and a PTFE reinforcing agent into a stirrer, and fully stirring for 20 minutes to obtain mixed powder modified PI; 2) putting the modified PI into a mold; 3) placingthe die filled with the modified PI below a hydraulic machine for die casting to obtain a semi-finished product of the sealing element; 4) putting the semi-finished product of the sealing element into a sintering furnace, and sintering for 14 hours; 5) putting the sintered semi-finished product of the sealing element into a pre-designed mold again and carrying out die casting by using the hydraulic press, and 6) putting the semi-finished product of the sealing element obtained in the step 5) into the sintering furnace again and sintering for 8 hours to obtain the finished product of the sealing element. The invention aims to provide the sealing element which has the characteristics of high density, high hardness, low plasticity and good stability.
Description
Technical field [0001] The invention relates to the field of seals, in particular to a seal and a preparation method thereof. Background technique [0002] Seals are an indispensable part in the transmission process. The products are mainly used for large-scale industrial connection. They are widely used in aviation, petrochemical, chemical fibertextile, valves, machinery, metallurgy and mining. [0003] The existing preparation method of the seal is usually as follows: 1. The raw material powder is prepared; 2. The raw powder is die-casted under the hydraulic press; 3. The formed seal is placed in a sintering furnace to obtain a finished product. However, the seal obtained by the above preparation method has low density, hardness, and high plasticity, and the product has the disadvantages of instability and short service life in practical applications. Summary of the invention [0004] The object of the present invention is to provide a sealing element which has the characteristi...
Claims
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Application Information
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