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Abstract

Process for moulding and producing hollow glass, in particular a glass cap (A) with a hollow area (A′) and a ring-shaped protuberance (A″), comprising the following steps: —providing a moulding apparatus (10) comprising: —a preparatory mould (11), lower, composed of two parts or halves (11a, 11b) which can be separated from each other, having a moulding surface (11′), and a cavity (11″), formed along this moulding surface, corresponding respectively to an external shape (A^Iv) and a shaped protuberance (A″) of a hollow glass article (A) to be moulded and produced; —a forming member (12), made up of two parts (12a, 12b) which can be separated 0 from each other, which surmounts and engages the lower preparatory mould (11); —a pressing member (13) or plunger, upper; and—a finishing mould (14); —closing (f2) the upper pressing member (13) against the lower preparatory mould (11) with the interposition of a drop of glass (V), in the molten state, so as to form, with the surface moulding element (11′) of the preparatory mould (11) and with the respective cavity (11″), the external shape (AIv) and the protuberance (A″, A″), and, with the pressing member (13) the hollow area (A′) of the hollow glass article; —lifting and extracting (f3) the upper pressing member (13); —opening (f4) the two parts (12a, 12b) of the forming member (12), so as to 0 disengage it from the preparatory mould (11) which holds the hollow glass article (A), thus formed; —turning (f5) the hollow glass article (A) upside down, holding it and moving it in free air with the preparatory mould (11), and transferring it (f5) to the finishing mould (14); —opening the two parts (11a, 11b) of the preparatory mould (11), in order to free the hollow glass article (A); and—extracting and removing (f7) the hollow glass article (A), after it has cooled, from the finishing mould (14). The process advantageously allows to produce an article (A) of hollow glass without 0 resorting to the blow moulding technology, as in the conventional processes of the blow-blow and press-blow type.

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