Mixing head for a reaction casting machine

Details Mixing head for a reaction casting machine Mixing head for a reaction casting machine

B - Operations, Transporting

29

C

B29C 67/24 (2006.01) B29B 7/76 (2006.01)

Patent

CA 2519924

The size of a mixing chamber (2) of a mixing head (1) for a reaction casting machine limits the number of possible components that can be additionally fed. In order to allow for the optional feeding of various additional components, the invention provides a mixing head (1) which, in addition to the charge devices (6) for at least two reactive components, especially polyol and polyisocyanate, and at least one injection bore (10) for feeding at least one additional component, comprises at least two feed mechanisms (16, 36, 56) for feeding different additional components and a movable connecting unit (14, 28, 50) by means of which the feed mechanisms (16, 36, 56) can be optionally connected to the at least one injection bore (10).

Les dimensions d'une chambre de mélange (2) d'une tête mélangeuse (1) conçue pour une machine de moulage par injection et réaction limitent le nombre des éventuels composants supplémentaires pouvant être ajoutés. Pour pouvoir introduire sélectivement différents composants supplémentaires, une tête mélangeuse (1) est conçue. Outre les dispositifs d'ajout (6) conçus pour l'introduction d'au moins deux composants réactifs, en particulier le polyol et le polyisocyanate, et en plus d'au moins un orifice d'injection (10) servant à l'introduction d'au moins un composant supplémentaire, cette tête mélangeuse (1) comprend au moins deux dispositifs d'alimentation (16, 36, 56) servant à l'introduction de différents composants supplémentaires, ainsi qu'une unité de liaison mobile (14, 28, 50) qui permet de relier sélectivement les dispositifs d'alimentation (16, 36, 56) avec le/les orifice(s) d'injection (10).

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