Deflector mixing head for reaction-molding machine

Details Deflector mixing head for reaction-molding machine Deflector mixing head for reaction-molding machine

B - Operations, Transporting

29

B

B29B 7/76 (2006.01) B01F 5/02 (2006.01) B01F 5/06 (2006.01) B29C 67/24 (2006.01)

Patent

CA 2417596

The invention relates to a deflector-mixer head for a reaction moulding machine, comprising a mixing chamber (2) which includes a control piston (12) used to regulate the inflow of components and an overflow chamber (10) which is arranged downstream from the mixing chamber in a perpendicular position thereto and provided with a cleaning piston (28) which controls the opening and closing of the mixing chamber side of the inlet of the overflow chamber. According to the invention, substantially improved mixing qualities are obtained by arranging a connection chamber (8), which is substantially parallel to the axis of the overflow chamber, between the mixing and overflow chambers and which is provided with deflector elements (22) that are positioned in the flow path between the inlet and outlet side of the connecting chamber (8), and by arranging a liftable displacement piston (20) parallel to the cleaning piston in order to empty the connection chamber.

L'invention concerne une tête de mélange déflectrice destinée à une machine pour moulage par réaction. Cette tête de mélange comprend une chambre de mélange (2), abritant un piston de commande (12) qui régule l'arrivée des composants, et une chambre d'évacuation (10) qui est placée en aval de la chambre de mélange, perpendiculairement à cette dernière, et qui présente un piston de nettoyage (28) commandant l'ouverture et la fermeture d'un orifice d'alimentation de la chambre d'évacuation, situé côté chambre de mélange. L'invention vise à améliorer sensiblement les propriétés de mélange de cette tête. A cet effet, une chambre de communication (8) sensiblement parallèle à l'axe de la chambre d'évacuation, est placée entre la chambre de mélange et la chambre d'évacuation. Cette chambre de communication comprend des éléments déflecteurs (22) positionnés entre son côté entrée et son côté sortie, dans le trajet d'écoulement, ainsi qu'un piston déplaceur (20) effectuant un mouvement alternatif parallèle au mouvement du piston de nettoyage, afin de vider la chambre de communication.

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