Title:
GRINDING BEADS AND BEADS PRODUCTION METHOD AND DEVICE THEREFOR
Document Type and Number:
WIPO Patent Application WO/2000/045994
Kind Code:
A1
Abstract:
Grinding or separating beads which are easy to adjust in grain size, consist of amorphous polyhedral slender elements suitable for instantaneous separation, and have classification-based homogeneous grain sizes. The beads production device comprising crusher units (11) for roughly crushing platy moldings of thermosetting resin into a dice- or pellet-form and a roll-type crushing unit (16). The crushing unit (16) comprises multi-stage crushing rolls (31 to 33) in which irregularities (36) formed on the surfaces of each pair of facing rolls are phase-deviated at 1/2 of a pitch and which crushes coarsely-crushed thermosetting-resin pieces into specified sizes. Classifying devices (20, 21, 22) disposed downstream the crushing unit (16) classify the resultant pieces to provide beads which are homogenized according to classification and which consist of amorphous polyhedral slender elements having sharp ridges.
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Inventors:
Tomioka, Naoyoshi (25-2, Koyama 6-chome Shinagawa-ku Tokyo, 142-0062, JP)
Application Number:
PCT/JP2000/000516
Publication Date:
August 10, 2000
Filing Date:
January 31, 2000
Export Citation:
Assignee:
BRIDGESTONE CORPORATION (10-1, Kyobashi 1-chome Chuo-ku Tokyo, 104-0031, JP)
Tomioka, Naoyoshi (25-2, Koyama 6-chome Shinagawa-ku Tokyo, 142-0062, JP)
Tomioka, Naoyoshi (25-2, Koyama 6-chome Shinagawa-ku Tokyo, 142-0062, JP)
International Classes:
B02C4/02; B02C23/10; (IPC1-7): B24C11/00; C08J3/12
Attorney, Agent or Firm:
Asakura, Masayuki (Shinwa Law & Patent Office 5th Floor Kono Building 23-9, Nishi-shimbashi 1-chome Minato-ku Tokyo, 105-0003, JP)
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