Manufacturing method of plastic stator for lightweight ultrasonic motor and lightweight ultrasonic motor
A technology for ultrasonic motors and plastic stators, applied in generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc. Long cycle times are unfavorable, and it is beneficial to mass production, improving friction and wear performance, and simplifying the assembly process.
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[0028] A method for preparing a plastic stator of a lightweight ultrasonic motor, comprising the steps of:
[0029] Step 1, raw material ratio: take by weight as follows:
[0030] Polymer matrix: 30%-70%; wherein, the polymer matrix is a mixture of one or more of polyphenylene sulfide, polytetrafluoroethylene, polyphenylene ester, and polyimide; the particle size of the polymer matrix is 400-1000 mesh;
[0031] Reinforcement fiber: 10%-35%; wherein, the reinforcement fiber is a mixture of one or more of carbon fiber, glass fiber, potassium carbonate whisker, and aramid fiber;
[0032] Friction and heat conduction improver: 5%-20%; wherein, the friction and heat conduction improver is one or a mixture of nano-copper powder, nano-diamond powder, nickel powder, and rare earth powder;
[0033] Add twin-screw extruder to blend, extrude and granulate, and set the temperature at 330°C to 360°C;
[0034] Step 2. Injection-molding the extruded blend on an injection mold into a too...
Embodiment 1
[0039] Embodiment 1: The tooth-shaped plastic stator is as follows in terms of weight percentage: 85% polyphenylene sulfide, 5% polytetrafluoroethylene, and 10% carbon fiber.
[0040] Specific steps are as follows:
[0041] 1) Weigh polyphenylene sulfide, polytetrafluoroethylene, and carbon fiber in proportion, add them to a twin-screw extruder for blending, extrusion, and granulation, and set the temperature at 350°C;
[0042] 2) Injection molding the blend into a plastic stator, the injection molding temperature is 330°C, and the injection molding pressure is 80MPa;
[0043] 3) Modification and processing of the obtained plastic stator, assembly;
[0044] The metal-plastic composite stator prepared in this example has a friction coefficient of 0.21, a preload force of 30N is applied, the rotational speed of the ultrasonic motor is 60r / min, and the stall torque is 0.15Nm. Reduced wear increases motor life.
Embodiment 2
[0045] Embodiment 2: The tooth-shaped plastic stator is as follows in terms of weight percentage: 80% of polyetheretherketone, 5% of polyphenylene sulfide, 5% of polytetrafluoroethylene, 5% of nano-diamond, and 5% of carbon fiber.
[0046] Specific steps are as follows:
[0047] 1) Weigh polyphenylene sulfide, polytetrafluoroethylene, and carbon fiber in proportion, add them to a twin-screw extruder for blending, extrusion, and granulation, and set the temperature at 330°C;
[0048] 2) Injection molding the blend into a plastic stator, the injection molding temperature is 340°C, and the injection molding pressure is 100MPa;
[0049] 3) Modification and processing of the obtained plastic stator, assembly;
[0050] The metal-plastic composite stator prepared in this example has a friction coefficient of 0.26, a preload force of 40N is applied, the rotational speed of the ultrasonic motor is 70r / min, and the stall torque is 0.18Nm.
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