Title:
SEAL RING
Document Type and Number:
WIPO Patent Application WO/2011/021273
Kind Code:
A1
Abstract:
Seal rings can keep the inside of a cylinder (1) of a screw extruder at high temperature and high pressure to suppress a variation in the pressure in the cylinder (1).
Special seal rings (300) rotatably integrally mounted, in a cylinder (1) of a screw extruder, to screw shafts (7) and suppressing delivery of an object being processed from the upstream to downstream portions in the cylinder (1). Lead grooves (317) extending in the screw shafts (7) in the axial direction thereof are formed in outer peripheral surfaces (316) facing the inner peripheral surface (1a) of the cylinder (1) with a predetermined gap therebetween. The lead grooves (317) disturb the flow of the object being processed passing through the gap between the outer peripheral surfaces (316) and the inner peripheral surface (1a) of the cylinder (1), and this stabilizes delivery resistance to suppress a variation in the pressure in the cylinder (1).
Inventors:
IKEDA SADAO (JP)
NAGASE TAKASHI (JP)
NAGASE TAKASHI (JP)
Application Number:
PCT/JP2009/064442
Publication Date:
February 24, 2011
Filing Date:
August 18, 2009
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
IKEDA SADAO (JP)
NAGASE TAKASHI (JP)
IKEDA SADAO (JP)
NAGASE TAKASHI (JP)
International Classes:
B29B7/48; B29C48/395; B29C48/67; F16J15/44; B29C48/60
Foreign References:
| JP2002531298A | 2002-09-24 | |||
| JPH0232990U | 1990-03-01 | |||
| JPH07124945A | 1995-05-16 | |||
| JP2001322155A | 2001-11-20 | |||
| JPH02255318A | 1990-10-16 | |||
| JPS62251119A | 1987-10-31 |
Attorney, Agent or Firm:
HIRAKI Yusuke et al. (JP)
Yusuke Hiraki (JP)
Yusuke Hiraki (JP)
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