Press bending station for the bending of glass sheets
First Claim
1. A press bending station for the bending of glass sheets, comprising:
- a full-face mold having a mold face, the mold face having at least one peripheral annular groove formed in the surface thereof, the at least one peripheral annular groove having a plurality of holes located therein; and
an annular mold;
wherein, the at least one peripheral annular groove is formed in a peripheral area that corresponds to the molding contact area where a glass sheet is pressed between the full-face mold and the annular mold.
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Accused Products
Abstract
A press bending station includes an annular mold (5) and a full-face mold (6). Holes (10), selectively connected to a negative pressure source, are placed in portions of the full-face mold (6) that are determined by the configuration of the annular mold when the annular mold comes into contact with a heated glass sheet (2) during the press bending process. The sheet (2) is drawn by negative pressure through the holes (10) towards the full-face mold (6) and thus acquires its shape. Positive pressure may be selectively applied to the holes (10) to release the sheet (2). According to the invention, at least some of the holes (10) are arranged in at least one groove (11) formed in the mold face of the full-face mold. The grooves (11) according to the invention accelerate considerably the removal by negative pressure of the air between the molding face of the full-face mold (6) and the glass sheet (2) to be bent and thus improve the press bending process.
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Citations
16 Claims
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1. A press bending station for the bending of glass sheets, comprising:
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a full-face mold having a mold face, the mold face having at least one peripheral annular groove formed in the surface thereof, the at least one peripheral annular groove having a plurality of holes located therein; and an annular mold; wherein, the at least one peripheral annular groove is formed in a peripheral area that corresponds to the molding contact area where a glass sheet is pressed between the full-face mold and the annular mold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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- 15. A press bending station having two opposing molds, the first mold having a major surface with at least one peripheral annular groove thereon, at least one hole defined therein, the hole being disposed in fluid communication with the at least one peripheral annular groove and selectively connected to a negative pressure source for holding material to the surface, thus allowing the material to be shaped into a part when the molds are urged together.
Specification