Method and device for producing a large-volume container

Details Method and device for producing a large-volume container Method and device for producing a large-volume container

B - Operations, Transporting

29

C

B29C 49/04 (2006.01) B29C 49/42 (2006.01)

Patent

CA 2341205

The invention relates to a method for producing a large-volume cup-shaped or tub-shaped container made of a synthetic thermoplastic material, whereby a compact plastic, flexible hose-type preform (6) is extruded to obtain a given length and the container (1) is subsequently shaped. In order to carry out said operations with the aid of extremely simple extrusion devices and moulds, the extruded preform (6) is expanded to a given size and a core (2) is moved upwards into the expanded preform (6). The lower, open end of the expanded preform (6) is then clamped against the core (2) to provide a seal and the preform is shaped by air in order to form a container.

L'invention concerne un procédé permettant de produire un contenant de grand volume du type tasse ou cuvette, en matière thermoplastique. Selon ledit procédé, une ébauche (6) du type tubulaire souple, constituée d'une matière plastique compacte, est extrudée sur une longueur prédéterminée puis soumise à un formage lui conférant sa forme de contenant (1). Pour que l'on puisse réaliser lesdites opérations à l'aide de dispositifs d'extrusion et de moules extrêmement simples, l'ébauche (6) extrudée est élargie d'une grandeur prédéterminée et un noyau (2) est amené, depuis le bas, dans l'ébauche (6) élargie. Ensuite, cette ébauche (6) élargie est, au niveau de son extrémité libre inférieure, serrée de façon étanche contre le noyau (2), puis soumise à un formage par air qui lui confère sa forme de contenant (1).

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