B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
B29B 7/12 (2006.01) B01F 7/22 (2006.01) B01F 15/02 (2006.01) B29C 39/24 (2006.01) B29C 44/00 (2006.01) B29C 44/34 (2006.01) B29C 44/42 (2006.01) B29C 31/06 (2006.01)
Patent
CA 2164211
An apparatus and method for manufacturing articles made of polyurethane that includes a mold assembly (12) in communication with a mix cham- ber (50). The mix chamber (50) is positioned be- low the mold assembly (12). The mix chamber (50) includes a propeller (102) for mixing the liquid polyurethane chemicals. The mix chamber (50) fur- ther includes a pneumatically actuated bladder (110) that causes the mixed chemicals to move from the mix chamber (50) to the mold assembly (12). The chemicals expand to take on the shape of the mold (12). The method of the present invention includes the steps of: (a) selecting polyurethane chemicals having certain specific weights; (b) placing said chemicals in a mix chamber wherein chemicals strat- ify according to their specific weights to prevent detrimental reaction among the chemicals until final mixing; and (c) allowing the chemicals to expand to form an article.
Appareil et méthode de fabrication d'articles en polyuréthane comportant un moule (12) en communication avec une chambre de brassage (50) placée sous le moule (12). La chambre de brassage (50) contient une hélice (102) servant au brassage des composants du mélange et une vessie (110) à commande pneumatique qui pousse les composants du mélange vers le moule (12) où ils s'expandent et prennent la forme du moule. Le procédé de fabrication associé consiste à: (a) sélectionner des polyuréthanes de masses volumiques données, (b) placer lesdits polyuréthanes dans la chambre de brassage (50) où ils se stratifient en fonction de leur masse volumique de façon à empêcher les réactions chimiques entre eux avant le brassage final, et (c) permettre l'expansion desdits polyuréthanes pour former un article.
Carson Scott
G. Ronald Bell & Associates
LandOfFree
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