Glass injection moulding process
AssigneeImperial Chemical Industries PLC
InventorsCyril John Lewis, Neil Carter, Neil Hunter Ray
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Abstract
The production of shaped glass articles is undertaken by an injection moulding process by charging a particulate inorganic glass having a transformation temperature of not greater than 300.degree. C to an injection moulding machine; by converting the glass to a molten state in the barrel of the machine; and by injecting the molten glass into a mould on the machine.
Claims8
A process for the production of shaped glass articles which comprises charging a particulate phosphate glass having a P.sub.2 O.sub.5 content of 25 mole % or greater having a transformation temperature of not greater than 300.degree. C. to an injection moulding machine, converting the glass to the molten state in the barrel of the machine, the barrel temperature being in the range from the temperature at which the glass becomes molten up to a temperature of 600.degree. C. injecting the molten glass into a mould on the machine, the temperature of the mould being maintained at a temperature in the range from the transformation temperature to 100.degree. C. below the transformation of said glass;
- and removing the molded article from said mould.
Dependencies are inferred from the claim text.