Overpressure-assisted gravity bending method device suitable therefor

A bending and gravity technology, applied in the device field of this method, can solve the problems of long bending time and increased production cost, and achieve the effect of reducing damage risk and high efficiency
CN106795032AActive Publication Date: 2017-05-31SAINT-GOBAIN GLASS FRANCE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SAINT-GOBAIN GLASS FRANCE
Publication Date
2017-05-31

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Abstract

The invention relates to a device for bending at least one glass pane (I), at least comprising a gravity bending mold (1), which has a supporting surface (2), which is suitable for arranging at least one glass pane (I) thereon, an upper shaping tool (3) arranged opposite the supporting surface (2), which upper shaping tool is suitable for producing an overpressure on the surface (O) of the at least one glass pane (I) arranged on the supporting surface (2) that faces away from the supporting surface (2), wherein the shaping tool (3) has a cover (8), which forms a cavity (5) open toward the gravity bending mold (1), and is equipped with a sealing lip (7), which is arranged on an edge segment (4) of the cover (8), for contacting the surface (O) of the at least one glass pane (I) that faces away from the supporting surface (2), and wherein the shaping tool (3) is equipped with means for introducing a gas into the cavity (5) in order to produce the overpressure.
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Description

technical field

[0001] The invention relates to an overpressure-assisted gravity bending method for glass sheets, a device suitable for the method, and the use of an upper forming tool for generating an overpressure in the gravity bending method. Background technique

[0002] Mounting glazing for motor vehicles typically has a curvature. A widely used method for bending glass sheets is so-called gravity bending (also known as gravity bending or sag bending). In this case, the glass pane, which is flat in the initial state, is arranged on the support surface of the bending form. Thereafter, the plate is heated to at least its softening temperature, so that the plate bears against the support surface under the influence of gravity. In this way, the shape of the glass pane can be influenced by the configuration of the support surface. The final bend is achieved by gravity bending. Such a method is known, for example, from document GB 813069 A. However, multi-stage bending ...

Claims

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