Title:
HEAT EXCHANGING RESIN PIPE AND ITS MANUFACTURING METHOD AND DEVICE
Document Type and Number:
Japanese Patent JP2003314981
Kind Code:
A
Abstract:
To provide a device for manufacturing a heat exchanging resin pipe having good heat transfer efficiency.
The device comprises an extruder 6 and a die connected to the extruder 6, the die consisting of an outer die 7 and an inner die 8. The inner die 8 has a recessed portion 9 formed in the outer periphery face at the end on the extrusion side in a constantly spaced manner in a peripheral direction. By using a motor for rotationally driving the inner die 8 via a speed reducer, the resin pipe 4 is extruded from the die with a protruded portion 5 being spirally formed on the inner periphery face thereof.
Inventors:
KUROIWA MITSUYUKI
NISHIMURA MASANARI
TANAKA HIROAKI
NISHIMURA MASANARI
TANAKA HIROAKI
Application Number:
JP2002115551A
Publication Date:
November 06, 2003
Filing Date:
April 18, 2002
Export Citation:
Assignee:
MITSUI CHEMICALS INC
International Classes:
F16L9/12; B29C48/32; F28F1/40; F28F21/06; B29L23/00; (IPC1-7): F28F1/40; B29C47/20; F16L9/12; F28F21/06
Attorney, Agent or Firm:
Koichi Sato
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