Composite material sliding bearing with base of high-temp polymer
A technology of high-temperature-resistant polymers and composite materials, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve problems such as high temperature sensitivity, poor dimensional stability, and easy creep, and achieve broad application prospects and reduce The effect of small friction coefficient and good thermal conductivity
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Embodiment 1
[0024] 1. Example 1. Injection molding polyimide-based composite sliding bearing
[0025] Taking the amount of polyimide (PI) resin as the metering basis (percentage by weight, the same below), the weighed PI is blended with 8% polytetrafluoroethylene by weight.
[0026] Get again with PI weight meter, handle with titanate, the expanded graphite of 5% micron order (diameter range is 10-50um), the molybdenum disulfide of 5% nanometer order (diameter range is 10-50nm), 8% of nano-scale (8-30nm in diameter) silicon carbide is evenly dispersed with the above matrix resin. Then, while stirring, add chopped carbon fiber with a length of <1mm, accounting for 10% of the PI dosage, and a constant amount of additives. After stirring vigorously for more than 5 minutes, put it into the barrel of the extruder for melting, extrusion, and granulation. . Finally, put the pellets into the barrel of the injection molding machine. The temperature of the barrel reaches about 350°C. After heatin...
example 2
[0028] 2. Example 2. Molded polyphenylene sulfide-based composite sliding bearing
[0029] Based on the amount of polyphenylene sulfide (PPS) resin used as the metering basis, the weighed PPS is added to polyamide (PA) accounting for 6% of the amount used for blending.
[0030] Then add titanate-treated molybdenum disulfide of 2% nano-scale (diameter range of 10-80nm), 5% of nano-scale (diameter range of 8-20nm) alumina, and the above matrix resin Disperse evenly. Then, while stirring, add the composite crystal fiber with a length of <1mm, accounting for 15% of the polyphenylene content, and a constant amount of additives. After stirring at a high speed for more than 5 minutes, put it into a porcelain cylinder ball mill and homogenize it for about 1 hour. . Finally, weigh the homogenized material and put it into a mold, heat it to 350°C-370°C, pressurize it to 7-8MPa, hold the pressure for 8-12 minutes, cool it down to room temperature naturally, and demould it to make polyp...
example 3
[0032] 3. Example 3. Extrusion molding high temperature resistant polymer matrix composite sliding bearing
[0033] Taking the amount of polyphenylene resin as the measurement basis (percentage by weight), the weighed polyphenylene is blended with 5% polytetrafluoroethylene and 5% polyamide by weight.
[0034]Take polyphenylene ester weight again, add the expanded graphite that accounts for 12% micron order (diameter range is 20-90um) that accounts for PPS consumption to be processed with silane coupling agent again, 3% nanometer order (diameter range is 10um) -100nm) mica, 5% micron-sized (diameter range of 8-30um) alumina, 5% micron-sized (diameter range of 8-80um) tungsten arsenide. At the same time, while stirring, add 10% of glass fibers with a length of <2mm, and 5% of bronze fibers with a length of <2mm. After vigorously stirring for more than 5 minutes, put them into the barrel of the extruder for melting and extrusion. , Granulation. Finally, put the pellets into th...
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