发明申请
- 专利标题： FLUID BEARING DEVICE, METHOD OF MANUFACTURING THE SAME, AND DISK DRIVE DEVICE
- 专利标题（中）： 流体轴承装置，其制造方法和盘驱动装置
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申请号： US12066597申请日： 2006-09-11
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公开(公告)号： US20090284866A1公开(公告)日： 2009-11-19
- 发明人: Kenji Ito , Fuyuki Ito
- 申请人： Kenji Ito , Fuyuki Ito
- 申请人地址： JP Osaka-shi, Osaka
- 专利权人： NTN CORPORATION
- 当前专利权人： NTN CORPORATION
- 当前专利权人地址： JP Osaka-shi, Osaka
- 优先权： JP2005-267144 20050914; JP2005-293882 20051006; JP2005-293890 20051006
- 国际申请： PCT/JP2006/317961 WO 20060911
- 主分类号： G11B17/02
- IPC分类号： G11B17/02 ; F16C32/06 ; B29C45/14 ; B32B37/12
摘要：
Provided is a fluid bearing device with a hub part having high molding precision and dimensional stability and capable of being produced at low cost. An annular gate (14) is formed at a portion of a cavity (15) corresponding to an outer peripheral edge portion of a lower end surface (10c1) of a flange part (10c), and a molten resin (P) is filled into the cavity (15) through the annular gate (14) to form a hub part (10) made of resin. The hub part (10) molded by the injection molding exhibits a radial resin orientation through an entire periphery thereof. Further, an annular gate trace (16) is formed at the outer peripheral edge portion of the lower end surface (10c1) of the flange part (10c) of the hub part (10).