Kneading rotor, batch kneader and method of kneading materials

B - Operations – Transporting – 29 – B

Patent

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Details

B29B 7/18 (2006.01) B01F 7/08 (2006.01)

Patent

CA 2742730

A kneading rotor, a batch kneader, and a material kneading method which are, when used to knead a material to be kneaded in a high-temperature condition, capable of providing a kneaded product having better quality than conventional kneaded products. A kneading rotor is provided with a rotor section which is disposed within a kneading chamber of a chamber of a batch kneader and applies shear force by kneading blades to a material to be kneaded which passes through tip clearances. A first long blade of the kneading blades has top ridges which form tip clearances of different sizes in three stages. The tip clearances are a large tip clearance, a medium tip clearance, and a small tip clearance which are arranged in the longitudinal direction of the first long blade, between the top ridges and the inner surface of the chamber in which the kneading chamber is formed. Among the kneading blades, a second long blade, a first short blade, and a second short blade each have a top ridge which forms a tip clearance of a size not smaller than the size of the small tip clearance but not greater than the size of the large tip clearance.

L'invention concerne un rotor de malaxage, un malaxeur discontinu et un procédé de malaxage de matériau, conçus pour le malaxage de matériau à haute température et susceptibles d'obtenir un produit malaxé de meilleure qualité que les produits malaxés conventionnels. Un rotor de malaxage est pourvu d'une partie rotor, disposée dans une chambre de malaxage dans un malaxeur discontinu et appliquant une force de cisaillement à l'aide de pales de malaxage à un matériau à malaxer passant à travers les dégagements de pointe. Une première longue pale des pales de malaxage possède des crêtes supérieures constituant des dégagements de pointe de différentes dimensions dans les trois étages. Les dégagements de pointe correspondent à un grand dégagement de pointe, un dégagement de pointe médian, et un petit dégagement de pointe qui sont disposés dans la direction longitudinale de la première longue pale, entre les crêtes supérieures et la surface interne de la chambre dans laquelle la chambre de malaxage est formée. Parmi les pales de malaxage, une seconde longue pale, une première courte pale et une seconde courte pale possèdent chacune une crête supérieure formant un dégagement de pointe de taille supérieure ou égale à la taille du petit dégagement de pointe mais sans dépasser la taille du grand dégagement de pointe.

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