Reactive hot-melt adhesive coating machine

B - Operations – Transporting – 05 – B

Patent

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Details

B05B 7/16 (2006.01) B05B 15/00 (2006.01) B05B 15/02 (2006.01) B05C 5/00 (2006.01)

Patent

CA 2252142

A reactive hot-melt adhesive coating machine capable of preventing a nozzle clogging by a simple construction is disclosed. A reactive hot-melt adhesive in a molten state supplied from an adhesive storage tank is fed to a spray means through an adhesive feeding passage. A cleaning fluid which is not curable reacting with moisture content in the ambient air is stored in a cleaning fluid storage tank. The cleaning fluid storage tank is connected to the adhesive feeding passage through a cleaning fluid feeding passage and a change-over valve. The change-over valve functions to disconnect the cleaning fluid feeding passage from the adhesive feeding passage when the reactive hot-melt adhesive is sprayed out of nozzles, and connect the cleaning fluid feeding passage to the adhesive feeding passage to discharge the cleaning fluid out of the nozzles when the nozzles are cleaned.

L'invention porte sur un appareil d'application d'une couche d'adhésif thermofusible réactif. L'appareil comprend un élément simple qui empêche l'obturation de la buse. L'adhésis thermofusible réactif, à l'état liquide, passe du réservoir de stockage à un dispositif de pulvérisation en suivant un passage d'alimentation. Un fluide nettoyeur qui ne durcit pas lorsqu'exposé à l'humidité de l'air ambiant est entreposé dans un réservoir de stockage de fluide nettoyeur. Ce réservoir est raccordé au passage d'alimentation en adhésif par un passage d'alimentation en fluide et un robinet coupleur. Ce dernier sert à séparer le passage d'alimentation en fluide nettoyeur du passage d'alimentation en adhésif lorsque l'adhésif thermofusible réactif est pulvérisé par les buses. Le robinet raccorde les deux passages afin d'amener le liquide nettoyeur à passer à travers les buses au cours du nettoyage de celles-ci.

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