METHOD FOR MANUFACTURING ROTOR CORE AND RESIN INJECTION DEVICE

To provide a method for manufacturing a rotor core which can prevent deterioration of characteristics (mechanical strength, heat resistance, etc.) of a resin material of a rotor core.SOLUTION: This method for manufacturing a rotor core 4 includes: a filling step of retracting a piston part 116b movi...

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Main Authors HAYASHI NAOTAKA, KOJIMA TOMOI, SABURI TOSHIYUKI, KOORI TOMOKI, OYA YOHEI
Format Patent
LanguageEnglish
Japanese
Published 03.06.2021
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
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Summary:To provide a method for manufacturing a rotor core which can prevent deterioration of characteristics (mechanical strength, heat resistance, etc.) of a resin material of a rotor core.SOLUTION: This method for manufacturing a rotor core 4 includes: a filling step of retracting a piston part 116b moving in a cylinder 116a part, and thereby filling the cylinder part 116a with a molten resin material 6; and an injection step of injecting the resin material 6 that is made to fill the cylinder part 116a to a magnet storage part 10. The filling step is a step of filling the cylinder part 116a with the resin material 6 while controlling the pressure of the resin material 6 that is made to fill the cylinder part 116a so that it is kept to be lower than a predetermined pressure P1 at which a filler 6a is separated from the resin material 6.SELECTED DRAWING: Figure 6 【課題】ロータコアの樹脂材の特性（機械的強度および耐熱性等）が悪化するのを防止することが可能なロータコアの製造方法を提供する。【解決手段】このロータコア４の製造方法は、シリンダ１１６ａ部内を移動するピストン部１１６ｂを後退させることにより、溶融された樹脂材６をシリンダ部１１６ａに充填する充填工程と、シリンダ部１１６ａに充填された樹脂材６を、磁石収容部１０に注入する注入工程と、を備える。そして、上記充填工程は、シリンダ部１１６ａに充填された樹脂材６の圧力が、樹脂材６から充填材６ａが分離される所定の圧力Ｐ１未満に維持されるように制御しながら、樹脂材６をシリンダ部１１６ａに充填する工程である。【選択図】図６
Bibliography:Application Number: JP20190214754