Apparatus for producing glass stopper for flip- or lever-top bottle, comprises mold with fixing, central and upper parts, closure loop hole forming pins and press punch

摘要

Apparatus for producing a glass stopper (3) for flip- or lever-top bottles comprises a mold (2) supplied with molten glass. Two pins (18, 18') in the mold are movable together to form a hole to receive a closure loop. The mold has (a) an indented fixing part (14) to form the stopper neck (12); (b) a central part with movable partial elements (13, 13') defining a cavity (14) for the stopper head (16); and (c) an upper part (6) with a central press punch (7). Apparatus for producing a glass stopper (3) for flip- top or lever-top bottles comprises a multipart mold (2) defining (in closed form) the negative contour of the stopper; a supply of molten glass to the mold; and two pins (18, 18') located in a region of the mold, which are movable together to form a hole in the stopper to receive the upper loop of the flip or lever closure. The mold has: (a) a fixing part (14) with an indentation (9) to form at least part (11) of the stopper neck section (12); (b) a central part with (preferably two) couplable, self-centering, partial mold elements (13, 13'), which are relatively movable perpendicular to the mold longitudinal axis and (when coupled and lying on the fixing part) define a cavity (14) for at least the main region of the head section (16) of the stopper; and (c) an upper part (6) with a central, vertically movable pressing punch (7) which closes the head cavity. An independent claim is included for a method for producing the glass stopper using the apparatus, involving: (A) supplying molten glass to the closed mold (2), with the frontal faces of the movable pins (18, 18') in contact with each other; (B) covering the closed mold with a cover ring (32); (C) pressing the glass using the pressing punch (7); (D) lifting the punch and cover ring; (E) cooling the upper region (17) of the head section (16) of the stopper (3); (F) moving the pins away from each other; (G) opening the central mold part (5) by moving the partial mold elements (13, 13') perpendicular to the mold longitudinal axis, such that the stopper remains fixed in the fixing part (4); and (H) removing the finished stopper from the fixing part of the mold.