One-piece die mold for molding a glass article, such as a salad bowl or a similar container, having at least one through hole, associated manufacturing equipment and corresponding molding process
AssigneeVetreria Di Borgonovo S.P.A.
InventorPier Francesco Piccioni
Life of this patent
Estimating the term…
Abstract
Mold for manufacturing glass containers such as salad has at least one through hole through their walls with three distinct parts; a die defining the outer shape of the container adapted to receive a gob of glass in a plastic state; a plunger, the inner shape of the container to be molded; and a closing ring. The three parts are pressed onto one another to cause pressing and expansion of the glass gob in the cavity of the mold. The die has a monolithic construction of one piece, and the closing ring and the one-piece die have at least one protruding portion defining the shape of the through hole to be molded and formed in the container.
Claims9
A mold (10) for molding glass articles (A, A1, A2, A3), particularly containers such as salad containers, bowls or the like, which are bored through, that is have a shape with at least one through hole or bore (FP, A1′, A2′, A3′) formed through the walls or thickness of the glass article, comprising:
- three distinct and separable parts (11, 12, 13) that is:
- a die (11) defining the outer shape of the glass container to be molded,
- a plunger (12) defining the inner shape of the glass container to be molded, and
- a closing ring (13),
- wherein said die (11) is adapted to receive a glass gob (V) in a plastic or molten state, and said three parts (11, 12, 13) are designed to be pressed onto one another to close the mold (10), and hence cause pressing and expansion of the molten glass gob (V) in the cavity (10′) of the mold and to mold and form the glass article or container (A),
- wherein said die (11) has a monolithic construction, composed of one piece, and
- wherein at least one of said closing ring (13) and said one-piece die (11) has a protruding portion (13a, 13′, 11′) defining the shape of the through hole or bore (FT) to be molded and formed in the glass container (A).
A process for molding glass articles (A) having a shape with at least one through hole or bore (FP), comprising the steps of:
- providing a mold (10) composed of three distinct and separable parts (11, 12, 13), that is a one-die die (11), a plunger (12), and a closing ring (13), at least one of the closing ring (13) and the one-piece die (11) having a protruding portion (13a, 13, 11′) that defines the shape of the through hole (FP) of the glass article (A) to be molded;
- depositing a molten glass gob (V) in the one-piece die (11) of the mold (10);
- closing the plunger (12) and the closing ring (13) with its protruding portion (13a, 13′, 11′) against the one-piece die (11), to close the mold, whereby, upon closure of the mold, the molten glass gob (V) expands in the cavity (10′) of the mold defined by the one-piece die, the plunger and the closing ring, to form the article (A) with the through hole (FP).
Dependencies are inferred from the claim text.