| 摘要 |
The method involves distributing filling openings (5,5',6) along length of hollow chamber profiled section (1,2). The discharge openings (8,22) are provided between filling openings, and are bored into chamber wall (11). The chambers are uniformly filled with insulating foam material by injecting foamable reactive mixture into chambers in metered manner. The filling openings are closed and mixture are expanded and cured while displacing gas present in chamber through discharge openings. The mixture is injected simultaneously or successively in metered manner through filling openings. The foamable mixture is cured to closed-cell polyurethane foam of density of 30-150 kg/m 3>. An auxiliary section made of thermoplastic material such as hard PVC is inserted in the hollow chamber, before metered injection of foamable mixture. An independent claim is included for process for preparing blend, or wing frame of window or door by using hollow-chamber profile. |
