Title:
APPARATUS FOR PRODUCING RIGID POLYURETHANE FOAM BY FROTHING METHOD
Document Type and Number:
WIPO Patent Application WO/2010/082318
Kind Code:
A1
Abstract:
An apparatus for producing a rigid polyurethane foam by the frothing method in which the supply of a compressed or liquefied inert gas as a blowing agent can be interlocked with the working of a foaming machine. The apparatus for producing a rigid polyurethane foam by the frothing method includes a blowing-agent feeder which supplies an inert gas as a blowing agent at a constant rate and a foaming means which mixes the inert gas with a polyol composition to form a foamed polyol composition and then mixes the foamed polyol composition with a polyisocyanate ingredient to discharge a rigid polyurethane foam. The blowing-agent feeder has: a pressure-reducing valve with which the pressure of the inert gas is reduced and regulated; and a needle valve with which the flow rate of the inert gas is regulated. The foaming means has a cylinder for compression by which the polyol composition is compressed and supplied. A regulator which regulates the supply of the inert gas to the foaming means has been disposed between the foaming means and the blowing-agent feeder. The regulator has been connected to a controller which senses the working of the cylinder for compression to control the regulator.
Inventors:
FUJIO, Akihiro (LTD.17-18 Edobori 1-chome, Nishi-k, Osaka-shi Osaka 61, 55086, JP)
Application Number:
JP2009/050375
Publication Date:
July 22, 2010
Filing Date:
January 14, 2009
Export Citation:
Assignee:
TOYO TIRE & RUBBER CO., LTD. (17-18, Edobori 1-chome Nishi-ku, Osaka-sh, Osaka 61, 55086, JP)
東洋ゴム工業株式会社 (〒61 大阪府大阪市西区江戸堀１丁目１７番１８号 Osaka, 55086, JP)
東洋ゴム工業株式会社 (〒61 大阪府大阪市西区江戸堀１丁目１７番１８号 Osaka, 55086, JP)
International Classes:
C08G18/00; B29C31/06; B29C39/24; C08J9/12
Attorney, Agent or Firm:
UNIUS PATENT ATTORNEYS OFFICE (SHIN-OSAKA MT Bldg. 1, 13-9 Nishinakajima 5-chome, Yodogawa-ku, Osaka-sh, Osaka 11, 53200, JP)
Download PDF: