Electric brush for electric tool motor and preparation method thereof
A technology of electric tools and electric brushes, which is used in the manufacture of brushes, circuits, current collectors, etc., can solve the problems of poor performance of electric brushes, poor anti-interference ability, poor stability, etc., and achieve good commutation performance and easy operation. , The effect of good wear resistance
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Embodiment 1
[0030] 1. Prepare materials according to the following proportions:
[0031]
[0032] 2. Raw material pretreatment
[0033] Add 0.625kg of acetone to all of the above epoxy resins, stir to dissolve the epoxy resin in the acetone, and prepare the epoxy resin glue;
[0034] 3. Mixing
[0035] To 15m 3 Add all of the above-mentioned flake graphite, epoxy resin glue, carbon black, aluminum phosphate, tungsten disulfide and aluminum oxide successively in the kneading pot, and stir and mix at room temperature for 60min to prepare the premix;
[0036] Turn on the heating device of the kneading pot, mix and heat the premix at the same time, when the temperature of the premix reaches 120°C, add the remaining acetone to the mixture, mix and continue to heat to make the temperature of the premix After reaching and maintaining the temperature at 130°C for 3 hours, the heating was stopped. When the mixture was freely cooled to a temperature of ≤100°C, it was discharged from the knead...
Embodiment 2
[0043] 1. Prepare materials according to the following proportions:
[0044]
[0045] 2. Raw material pretreatment
[0046] Add 0.6kg of acetone to all of the above epoxy resins, stir to dissolve the epoxy resin in the acetone, and prepare the epoxy resin glue;
[0047] 3. Mixing
[0048] To 15m 3 Add all of the above-mentioned flake graphite, epoxy resin glue, carbon black, aluminum phosphate, tungsten disulfide and aluminum oxide successively in the kneading pot, and stir and mix at room temperature for 80min to prepare a premix;
[0049] Turn on the heating device of the kneading pot, mix and heat the premix at the same time, when the temperature of the premix reaches 130°C, add the remaining acetone to the mixture, mix and continue to heat so that the temperature of the premix is After reaching and maintaining the temperature at 140°C for 3 hours, the heating was stopped, and when the mixture was freely cooled to a temperature of ≤100°C, it was discharged from the kn...
Embodiment 3
[0056] 1. Prepare materials according to the following proportions:
[0057]
[0058] 2. Raw material pretreatment
[0059] Add 0.375kg industrial alcohol to all of the above epoxy resins, stir to dissolve the epoxy resin in the industrial alcohol, and prepare the epoxy resin glue;
[0060] 3. Mixing
[0061] To 15m 3 Add all of the above-mentioned flake graphite, epoxy resin glue, carbon black, aluminum phosphate, molybdenum disulfide and aluminum oxide successively in the kneading pot, and stir and mix at room temperature for 80min to prepare a premix;
[0062] Turn on the heating device of the kneading pot, and mix and heat the premix at the same time. When the temperature of the premix reaches 110 °C, add the remaining industrial alcohol to the mixture, mix and continue to heat, so that the premix is heated. The temperature reached and kept at 120°C for 2 hours, and the heating was stopped. When the mixture was freely cooled to a temperature of ≤100°C, it was disch...
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