Method of forming a molded article by wireless control

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 37/00 (2006.01) B29C 69/00 (2006.01)

Patent

CA 2740611

The present invention relates to a method and molding system (1) for forming a molded plastic article by wireless control. The molding system includes a primary controller (12) that is adapted to engage in wireless communications with the carriage controller (45) of one or more self-propelled carriages (15). Each carriage (15) includes a carriage location indicator (62) that determines the location of the carriage, which is transmitted substantially continuously to the carriage controller (45), and then communicated substantially continuously and wirelessly from the carriage controller to the primary controller (12). The primary controller (12) wirelessly communicates position directives (e.g., a polymer introduction station position directive) to each carriage controller (45), which correspondingly provides operational position instructions to each carriage's respective propulsion system (30), so as to re-position at least one carriage. The primary controller also provides directives to other secondary controllers in the molding system, depending on the status of, and in particular the location of the various carriages within, the molding system. For example, with a carriage (15) positioned in the polymer introduction station (18), the primary controller (12) communicates one or more polymer introduction directives to a polymer introduction controller (68), which then provides operational polymer introduction instructions to a polymer introduction apparatus (71 ), such as an extruder, thus resulting in the introduction of a polymer composition into contact with the interior mold surface (27) of the mold (24), and accordingly formation of a molded article.

La présente invention concerne un procédé et un système (1) de moulage destinés à former un article en plastique moulé par radiocommande. Le système de moulage comprend une commande primaire (12) prévu pour entrer en communication radio avec la commande (45) de chariots d'un ou de plusieurs chariots automoteurs (15). Chaque chariot (15) comprend un indicateur (62) d'emplacement du chariot qui détermine l'emplacement du chariot, celui-ci étant transmis sensiblement en continu à la commande (45) de chariots, puis communiqué sensiblement en continu et par radio de la commande de chariots à la commande primaire (12). Ladite commande primaire (12) communique par radio des directives de position (par ex. une directive de position de poste d'introduction de polymère) à chaque commande (45) de chariot, qui envoie en conséquence des instructions opérationnelles de position au système (30) de propulsion respectif de chaque chariot, de façon à repositionner au moins un chariot. La commande primaire envoie également des directives à d'autres commandes secondaires du système de moulage, en fonction de l'état du système de moulage et en particulier de l'emplacement des divers chariots qui s'y trouvent. Par exemple, lorsqu'un chariot (15) est positionné au poste (18) d'introduction de polymère, la commande primaire (12) communique une ou plusieurs directives d'introduction de polymère à une commande (68) d'introduction de polymère, qui envoie alors des instructions opérationnelles d'introduction de polymère à un appareil (71) d'introduction de polymère, comme une extrudeuse, ce qui se traduit par l'introduction d'une composition de polymère au contact de la surface intérieure (27) du moule (24), et donc par la formation d'un article moulé.

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