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Talking about the injection molding bracket
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Followed by the bearing speed; the density of the metal data is not satisfied with the bearing requirements; and the density is only 1/4 to 1/8 of the metal; wear, shock, diamagnetic, radiation, corrosion, low conflict The plastics with common strengths; the team that has entered the information of the roll bearing. The phenolic laminated fabric has low density, high mechanical strength, good mechanical processing function, certain heat-resistant temperature and oil absorption and oil seepage; Widely applied to the support frame of angular touch ball bearings with inner diameter of 2~200mm. For example, high-speed grinding head bearings, machine tool bearings, external bearings, gyroscope bearings, turbine bearings, supercharger bearings, etc. all use phenolic laminated cloth to support the frame; The dn value can be as high as 12×106mm r/min.
Where the metal support frame is not satisfactory to the host's needs; the plastic support frame shows special advantages, such as bearings that do not allow the use of smooth oil liquid oxygen (-183 ° C); with a stamped steel frame Deep groove ball bearing 6204 is burned in 100kg axial load; 10000r/min for 16min; and glass fiber reinforced PTFE plastic is used to make the angular contact ball bearing of the frame; the axial load at 100kg; 20000r/ After working for 20 hours at min; the conflicting moment is still not added. The polyimide modified with molybdenum disulfide, polytetrafluoroethylene and glass fiber is used as the bearing holder; it can be operated without oil under vacuum radiation; it has been applied to Abo Luo Fei ship. Porous oil-containing polyimide adheres to the long-life bearing of the gyroscope; the porous oil-containing phenolic laminated cloth adheres to the bearing of the communication satellite organization; the polyimide adheres to the high-speed dental drill bearing; Glass fiber reinforced polyamide 66 adheres to the gearbox, differential gearbox, clutch and hub of the car, water pump and mine conveying equipment; the application is very outstanding.
Some foreign companies are using plastics for a long time; for example, SKF has selected plastics of various types of bearings to be in the scope of certain scales, and the plastics used by FAG have accounted for 30% of their output value; Most of the more than 50 sets of bearings supplied by each car; most of them use plastic support frame. Door and window bearings, high-grade furniture drawer bearings, table slewing bearings, toy bearings, etc. have been selected from engineering plastics to maintain the frame; have many metal savings, save Working hours, cost reduction and other common strengths; and has an outstanding self-smoothing function.
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