Method and apparatus for dispensing liquids and solids

Details Method and apparatus for dispensing liquids and solids Method and apparatus for dispensing liquids and solids

B - Operations, Transporting

05

B

B05B 7/32 (2006.01) B67D 7/08 (2010.01) B67D 7/36 (2010.01) B67D 7/74 (2010.01) F16K 11/10 (2006.01) G05D 16/20 (2006.01) G05D 27/02 (2006.01) F04C 14/24 (2006.01)

Patent

CA 2321818

A system (Fig. 16) for metering and dispensing component liquids and solids has a microprocessor-based control system and progressive cavity pumps which provide accurate control of component ratios, shot sizes, flow rates and dispense durations. The system has feedback components (58, 66, 60, 68) for controlling the pressure, flow rates, fluid levels and amounts of fluids dispensed. The pressure in the flow system is used to control the pumps (34, 36) rather than a valved nozzle (49). The system may be used as a sprayer with compressed air added. Back and forth movement of the pump provides compensation for pressure changes. A mold charging system uses pressure to control the pumps which are cycled on and off to avoid overpressurizing the mold. The rate of pressure increase is used to control the rate of flow from the pumps as the mold approaches completion of the charge to avoid overpressurizing the mold.

L'invention concerne un système (dessin 6) de mesure et de distribution de composants liquides et solides, le système comprenant un système de commande sur la base d'un microprocesseur et des pompes à cavité intermédiaire permettant d'effectuer une régulation précise des rapports de composants, de la taille des charges d'injection, du débit et de la durée de distribution. Le système comprend des composants de retour (58, 66, 60, 68) destinés à réguler la pression, le débit, les niveaux de fluides et les quantités de fluide distribuées. On utilise la pression dans le système d'écoulement pour commander les pompes (34, 36) plutôt qu'une buse à valve (49). On peut utiliser le système comme un pulvérisateur auquel on a ajouté de l'air comprimé. Le mouvement d'avant en arrière de la pompe permet de compenser les changements de pression. Un système de charge de moule utilise la pression pour commander les pompes qui comprennent des cycles de "marche" et "arrêt" pour éviter une surpression du moule. On utilise la vitesse d'augmentation de pression pour commander la vitesse d'écoulement à partir des pompes lorsque la charge du moule est presque complète afin d'éviter une surpression du moule.

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