COVERING METHOD OF COLLECTING PIPING SYSTEM WITH POST-SHRINKING EXPANDABLE POLYURETHANE

Japanese Patent JPH1147687

A

PROBLEM TO BE SOLVED: To produce a coated piping system coated as far as the inside of a complicated piping system without increasing an occupied volume by using an expandable polyurethane having a post-shrinking property of a specified shrinkage factor as a polyurethane in the case that a collecting piping system is integrated into one body with the polyurethane resin and formed in a mold. SOLUTION: A sound insulating vibration insulating material is fitted to a copper pipe 1 in order to prevent the generation of cracking by being vibrated copper piping 1 for a refrigeration medium (copper piping) in an inner outer machine of an air conditioner with a vibrate source or a generation of noise when a two-layered flow air containing the refrigeration medium flows in the copper piping. That is, the copper piping with each other are integrated vibratingly by molding integrally a post-shrinking expandable polyurethane 2 having >=15% shrinkage factor and incorporated at need with a powder having a high specific density in a mold 3 having a large inner volume and a smooth inner surface. The post-shrinkage expandable polyurethane 2 is allowed to heave to cover the copper piping 1 at a site between the copper pipings 1 at which gap in present and molded in a largely depressed external shape at a gap part.

MIYAWAKI TADASHI

JP22092897A

February 23, 1999

August 01, 1997

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I P S L KK

F16L58/10; B05D7/24; B29C39/10; C08G18/00; F16L9/19; B29K75/00; B29K105/04; C08G101/00; (IPC1-7): B05D7/24; B29C39/10; C08G18/00; F16L9/19; F16L58/10

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