Abstract This invention relates to a moulding apparatus including outer moulding means and an expandable and collapsible core located within said outer moulding means, said core being expandable to provide a moulding gap between said core and said outer moulding means in which an article to be produced may be moulded and collapsible to facilitate removal of the moulded article therefrom, said core being comprised of at least three separate core members combining when said core is in its expanded position to provide an outer moulding surface, at least one of said core members being a transversely slidable core member movable inwardly substantially perpendicularly with the core axis and at least two of two core members being substantially longitudinally slidable core members slidable in a generally longitudinal direction at an angle to the actual longitudinal axis of the moulding core so that on sliding from an expanded moulding position to a retracted position the surface portions of the moulding surface provided by each of the longitudinal members also moves inwardly of the moulding core.
Moulding apparatus including an outer moulding means expandable away from the article moulded, said outer moulding means being comprised by a plurality of transversely slidable outer moulding members supported on a mould base and an expandable and collapsible core located within said outer moulding means, said core being expandable to provide a moulding gap between said core and said outer moulding means in which an article to be produced may be moulded and collapsible to facilitate removal of the moulded article therefrom, said core being comprised of aT least three separate core members combining when said core is in its expanded position to provide an outer moulding surface, at least one of said core members being a transversely slidable core member movable inwardly perpendicularly with the core axis and at least two of two core members being longitudinally slidable core members slidable in a generally longitudinal direction at an angle to the actual longitudinal axis of the moulding core so that on sliding from an expanded moulding position to a retracted position the surface portions of the moulding surface provided by each of the longitudinal members also moves inwardly of the moulding core and wherein each of said core members is provided with cooling means within its structure.
Claim 2
Dependent Claim
208 words
Moulding apparatus including an outer moulding means expandable away from the article moulded, said outer moulding means being comprised by a plurality of transversely slidable outer moulding members supported on a mould base and an expandable and collapsible core located within said outer moulding means, said core being expandable to provide a moulding gap between said core and said outer moulding means in which an article to be produced may be moulded and collapsible to facilitate removal of the moulded article therefrom, said core being comprised of aT least three separate core members combining when said core is in its expanded position to provide an outer moulding surface, at least one of said core members being a transversely slidable core member movable inwardly perpendicularly with the core axis and at least two of two core members being longitudinally slidable core members slidable in a generally longitudinal direction at an angle to the actual longitudinal axis of the moulding core so that on sliding from an expanded moulding position to a retracted position the surface portions of the moulding surface provided by each of the longitudinal members also moves inwardly of the moulding core and wherein each of said core members is provided with cooling means within its structure.
Claim 3
Dependent Claim
50 words
Moulding apparatus as claimed in claim 1 wherein the outer surface of said outer moulding members is sloped and adapted to correspond with a sloped skirt member movable in conjunction with an upper core member whereby said sloped skirt member may force said outer moulding members into their moulding positions.
Claim 4
Dependent Claim
38 words
Moulding apparatus as claimed in claim 2 wherein said sloped skirt member includes a stop member adapted to engage in a stop hole in said mould base whereby to lock the outer moulding members in their moulding positions.