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US 5,342,463 AGranted
Process for producing shaped articles by starting from reinforced thermoplastic sheets
AssigneeCentro Sviluppo Settori Impiego S.r.l.
InventorsAntonio Addeo, Mario Vitali, Roberto Bonari
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Abstract
A process for fabricating manufactured articles from fiberglass reinforced thermoplastic sheets, which consists of forming said plates while they are heated at their melting point and coupled with a barrier film, by either blow-moulding or thermoforming.
Claims4
A process for transforming reinforced thermoplastic sheets (RTS), which become porous in the molten state, into a double-shell box-shaped manufactured article by heating and subsequently molding the sheets, said process comprising the following steps:
- a. overlaying the sheets with a pair of barrier films to render the sheets gas-tight;
- b. charging the sheets between two half molds with the sheets facing each other and having the barrier films therebetween;
- c. clamping together both half-molds;
- and
- d. forcing the sheets to conform against said half-molds by using either compressed air which is fed between said two barrier films or vacuum which is applied to the half-molds, allowing the sheets to bond or weld to each other, whereby to obtain the double-shell box-shaped manufactured article.
2 more elements
Dependencies are inferred from the claim text.