Occurrence of jetting is prevented in injection molding of a protective cover having a thin separation wall in a disc part. A protective cover 1 is molded through injection molding of a synthetic resin and includes a disc part 2, a sensor holder part 4 protruding inward from the disc part 2, and a protruding part 6 protruding inward from the disc part 2 and continuous with the sensor holder part 4. The disc part 2 includes a separation wall which is thinner than other portions of the disc part 2 and separates a magnetic encoder and a magnetic sensor from each other. The protruding part 6 has, at the inward-side face thereof, a gate mark GM caused by the injection molding. The protruding part 6 is provided with, at the outward-side face thereof, a thickness reduction part 7 extending inward so as to be close to the gate mark GM. In the injection molding, a molten synthetic resin material injected from a gate at the position of the gate mark GM collides with a columnar part for providing the thickness reduction part 7, thereby changing the flowing direction of the resin material to flow along the wall faces of the die. This prevents jetting from occurring.
PROTECTIVE COVER HAVING SENSOR HOLDER PART, BEARING DEVICE INCLUDING THE PROTECTIVE COVER, AND METHOD FOR MANUFACTURING THE PROTECTIVE COVER HAVING THE SENSOR HOLDER PART
SCHUTZABDECKUNG MIT SENSORHALTERTEIL, LAGERVORRICHTUNG MIT DER SCHUTZABDECKUNG UND VERFAHREN ZUR HERSTELLUNG DER SCHUTZABDECKUNG MIT DEM SENSORHALTERTEIL
COUVERCLE DE PROTECTION AYANT UNE PARTIE DE SUPPORT DE DÉTECTEUR, DISPOSITIF DE PALIER COMPRENANT LE COUVERCLE DE PROTECTION ET PROCÉDÉ DE FABRICATION DU COUVERCLE DE PROTECTION AYANT LA PARTIE DE SUPPORT DE DÉTECTEUR
2019-10-02
Patent
Electronic Resource
English
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