公开(公告)号：US20190061212A1

公开(公告)日：2019-02-28

申请号：US16076899

申请日：2016-02-19

Applicant: NSK LTD.

Inventor： Yoshikazu KURAMOTO ,  Nariaki AIHARA ,  Takayuki HIRAMOTO

IPC: B29C45/00 ,  F16C19/06 ,  F16C33/41 ,  B29C45/26 ,  B29C45/27

Abstract: The resin injection gate is disposed at the pillar part. When the bearing cage is divided into first and second regions by an imaginary line connecting the resin injection gate and a weld to be formed at a position radially facing the resin injection gate, a resin reservoir that can store therein the melted resin is formed at the pillar part in only one of the regions. A circumferential distance between the resin reservoir and the weld is smaller than a circumferential distance between the resin reservoir and the resin injection gate. A cross-sectional area of a communicating part of the resin reservoir, which is configured to communicate with the pillar part, is equal to or less than a quarter of a cross-sectional area of the resin injection gate.

公开(公告)号：US20190054673A1

公开(公告)日：2019-02-21

申请号：US16077884

申请日：2016-02-26

Applicant: NSK LTD.

Inventor： Yoshikazu KURAMOTO ,  Nariaki AIHARA ,  Takayuki HIRAMOTO

IPC: B29C45/27 ,  F16C33/44

CPC classification number: B29C45/2708 ,  B29C45/0025 ,  B29C45/0046 ,  B29C45/2616 ,  B29C45/2628 ,  B29C45/2669 ,  B29C2045/0006 ,  B29C2045/0027 ,  B29C2045/0044 ,  B29K2101/12 ,  B29K2309/08 ,  B29L2031/04 ,  F16C19/06 ,  F16C33/416 ,  F16C33/44 ,  F16C33/498 ,  F16C2208/04 ,  F16C2300/02

Abstract: A resin reservoir capable of storing the melted resin is provided in the pillar radially facing the pillar provided with the resin injection gate having a cross-sectional area larger than those of the other resin injection gates among a plurality of the pillars not provided with the resin injection gate or the pillar in the vicinity of the pillar facing the pillar provided with the resin injection gate having a cross-sectional area larger than those of the other resin injection gates among the plurality of the pillars not provided with the resin injection gate. A cross-sectional area of a communicating portion of the resin reservoir which communicates with the pillar is smaller than the smallest of cross-sectional areas of a plurality of the resin injection gates.

公开(公告)号：US20180056561A1

公开(公告)日：2018-03-01

申请号：US15557617

申请日：2016-03-11

Applicant: NSK LTD.

Inventor： Yoshikazu KURAMOTO ,  Nariaki AIHARA ,  Takayuki HIRAMOTO

IPC: B29C45/26 ,  F16C19/00 ,  F16C33/41 ,  F16C33/49

CPC classification number: B29C45/26 ,  B29C45/0025 ,  B29C45/0046 ,  B29C45/2708 ,  B29C2045/0027 ,  B29L2031/045 ,  F16C19/00 ,  F16C19/06 ,  F16C33/41 ,  F16C33/416 ,  F16C33/49 ,  F16C2220/04 ,  F16C2300/02

Abstract: A bearing holder is to be formed by injecting a melted resin, from a plurality of resin injection gates provided at a peripheral edge portion of a substantially annular cavity formed in a molding die, into the cavity. At least one column portion is provided with a resin reservoir capable of reserving therein the melted resin. A cross-sectional area of a communication portion of the resin reservoir configured to communicate with the column portion is equal to or smaller than ¼ of a cross-sectional area of the resin injection gate.