A hollow roto-moulded article
AssigneeOmni Composite Tank Limited
InventorsDaniel Christopher RODGERS, Luke Philip DJUKIC, Adrian Y. KONG, Nimal Kumar BALASUBRAMANI
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Abstract
A hollow roto-moulded article, having an inner wall defining an interior of the article and integrally formed structure with the inner wall, the integrally formed structure protruding away from the interior of the article, the article formed of a first layer including one or more thermoplastic polymers, and a second layer including one or more fibrous materials.
Claims47
A hollow roto-moulded article, having an inner wall defining an interior of the article and integrally formed structure with the inner wall, the integrally formed structure protruding away from the interior of the article, the article formed of a first layer including one or more thermoplastic polymers, and a second layer including one or more fibrous materials.
The hollow roto-moulded article of any one of the preceding claims, wherein the one or more thermoplastic polymers in the first layer include one or more of ethylene homopolymers, ethylene co-polymers, propylene homopolymers, propylene co-polymers, fluoropolymers, polyvinylchloride, polyvinylidene chloride, polyaryl ether ketone and polyamide.
The hollow roto-moulded article of any one of the preceding claims, wherein the one or more fibrous materials in the second layer include one or more of glass fibre, carbon fibre and basalt fibres, or precursors thereof.
The hollow roto-moulded article of any one of the preceding claims, wherein the article includes a third layer including a plurality of filaments selected from one or more of carbon, glass, aramid and basalt filaments, and one or more thermosetting polymers, wherein the second layer is disposed between the first layer and the third layer, and wherein the one or more fibrous materials is at least partly infiltrated with both the one or more thermoplastic polymers and the one or more thermosetting polymers.
The hollow roto-moulded article of any one of the preceding claims, wherein an inner wall of at least one of the one or more nozzles, or a portion of said inner wall, is angled with respect to a longitudinal axis of the nozzle, such that a channel defined by said inner wall, or said angled portion, is wider at an exterior facing end of the channel.
The hollow roto-moulded article of claim 21, wherein said angled inner wall, or said angled portion, defines a sealing surface configured to engage a sealing device.
The hollow roto-moulded article of any one of the preceding claims, wherein the or each nozzle is configured to receive one or more component parts that form one or more respective nozzles of the article.
The hollow roto-moulded article of any of the preceding claims, wherein the article is a hollow composite vessel.
A method of producing a hollow composite vessel, the method including:
- applying one or more fibrous materials to an internal surface of a hollow mould, the hollow mould including structure protruding away from an interior of the mould;
- heating and rotating the hollow mould in the presence of one or more thermoplastic polymers within the hollow mould so that the polymer melts and at least partially infiltrates the fibrous material;
- cooling the mould so that the thermoplastic polymer solidifies;
- and
- releasing a hollow thermoplastic polymer/fibrous material composite vessel having structure protruding away from an interior of the vessel from the mould.
Dependencies are inferred from the claim text.