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Title:
TWIN-SHEET THERMOFORMING OF PLASTIC FUEL TANKS
Document Type and Number:
WIPO Patent Application WO2004062889
Kind Code:
A9
Abstract:
A method and a plant for twin-sheet thermoforming of fuel tanks; first and second sheets (SA, SB) of thermoformable plastic material, are separately fed along respective processing lines (10A, 10B). The sheets (SA, SB) are heated and gripped along their peripheral edges by a pneumatically actuate suction and vacuum holding device (15A, 15B), for supporting the heated sheets (SA, SB) in a substantially flat condition while they are moved towards a respective thermoforming station (16A, 16B). Both the molds (17A, 17B) are disposed side by side with their open cavity facing upwards. After thermoforming of the plastic sheets (SA, SB), one of the molds (17B) is turned upside down onto the other mold (17A), to overlap and weld superimposed sealing areas of the two thermoformed shells (GA, GB). Cooling of the molds and thermoformed tank may be performed on a side of the processing lines (10A, 10B).

Inventors:
BINDA GABRIELE (IT)
FIORENTINI FRANCESCO (IT)
MARIANI DAVIDE (IT)
SBRANA LOREDANO (IT)
ORTENZI CARLO (IT)
Application Number:
PCT/EP2003/014962
Publication Date:
July 14, 2005
Filing Date:
December 30, 2003
Export Citation:
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Assignee:
CANNON SPA (IT)
BINDA GABRIELE (IT)
FIORENTINI FRANCESCO (IT)
MARIANI DAVIDE (IT)
SBRANA LOREDANO (IT)
ORTENZI CARLO (IT)
International Classes:
B29C65/02; B29C69/00; B29C35/16; B29C51/10; B29C51/12; B29C51/14; B29C51/20; B29C51/26; B29C51/38; B29C51/42; B29C51/46; (IPC1-7): B29C65/18; B29C69/00
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