Title:
Duct
Document Type and Number:
Japanese Patent JP6217159
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a duct which can effectively increase the porosity thereof and can obtain excellent thermal insulation.SOLUTION: A duct 10 has a pair of semi-cylindrical duct half bodies 20A, 20B which are joined together to form a cylindrical shape. The duct half bodies 20A, 20B are resin moldings obtained by blow molding a parison or a plurality of sheets in a molding die, and each have an outer surface part 22 molded into a predetermined shape by a recessed molding surface of the molding die and an inner surface part 23 molded into a predetermined shape by a protruded molding surface of the molding die. In the duct 10, the duct half bodies 20A, 20B are each formed of a hollow resin molding, so that a peripheral wall of the duct 10 can have a hollow structure. Consequently, the porosity of the duct 10 can be increased.
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Inventors:
Yu Igarashi
Masaaki Onodera
Ono Keiji
Masaaki Onodera
Ono Keiji
Application Number:
JP2013126991A
Publication Date:
October 25, 2017
Filing Date:
June 17, 2013
Export Citation:
Assignee:
Kyoraku Co., Ltd.
International Classes:
B29C49/04; B29C49/48; B60H1/00; F16L9/12; F24F13/02
Domestic Patent References:
| JP2012158186A | ||||
| JP49045796B1 |
Attorney, Agent or Firm:
Tomohiro Sakamoto