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Method and device for bending glass panes in pairs

A window glass, bending technology, applied in the field of devices implementing the method, capable of solving problems affecting optical properties, etc.

Inactive Publication Date: 2007-04-11
SAINT GOBAIN VITRAGE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This positively affects the optical properties (transparency)

Method used

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  • Method and device for bending glass panes in pairs
  • Method and device for bending glass panes in pairs
  • Method and device for bending glass panes in pairs

Examples

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Embodiment Construction

[0038] FIG. 1 shows a pair of panes 2 placed on a frame-shaped bending mold 3 inside a simple bending device indicated at 1 . Overall, the bending mold is already available for conveying the laid pane during heating of the pane to its softening temperature in a furnace not shown which may be part of the device. However, the transfer can also take place in another way with other devices known per se. The bending process of pairs of panes always starts with a common pre-bending step under the force of gravity acting on the bending mold 3 . This prebending has already been carried out at the stage shown in FIG. 1 .

[0039] On the bending die 3 is provided a convex upper die 4 which also has a frame shape. The profile of the forming surface is slightly smaller than the profile defined by the curved die. The function of this upper mold 4 will also be explained later. However, in certain circumstances which will vary, this upper mold 4 need not be used in the method described h...

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Abstract

The invention concerns a method for bending in pairs stacked glass panes heated to their softening temperature which consists in: placing the pair of glass panes (2) on a bending frame (4) for pre-bending under the action of gravity; transferring the pre-bent pair of glass panes (2) onto a suction bending mould (5) with a concave forming surface, a pressure of the lower surface of the glass pane located in lower position being produced at least on the peripheral edge of the forming surface; by applying a vacuum for a predetermined time interval, sucking the air out of the intermediate space between the lower surface of the glass pane located in lower position and the suction bending mould (5) and pressing the pair of glass panes (2) with atmospheric pressure on the concave forming surface of the suction bending mould (5); after applying the vacuum, transferring the pair of glass panes (2) completely moulded from the suction bending mould (5) onto a transport device (7) and cooling it.

Description

technical field [0001] The invention relates to a method for bending pairs of panes, in which method the pair is pre-bent in a horizontal position by the action of gravity on a bending frame and subsequently bent by means of a solid bending mold , the solid bending mold acts on the pre-bent pair of panes. The invention also relates to a device particularly suitable for carrying out the method. Some pairs of panes are then in principle, but not absolutely, made into multi-glazed windshields for vehicles. Background technique [0002] Document DE-C1-4337559 describes a suitable method in which the pre-curved glazing pair on the curved frame is carried out through the bottom on a solid upper curved mould. The solid upper bending mold surrounds at its edge a skirt which together with the outer edge of the upper bending mold forms an annular gap. After some heated panes have been applied to the upper bending mold by means of the bending frame, air is sucked in through said ann...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B23/035C03B23/025C03B23/03C03B35/20
CPCC03B23/0252C03B23/0357C03B35/202C03B23/03C03B23/035
Inventor M·巴尔杜因M·拉布罗特H·哈维尼斯
Owner SAINT GOBAIN VITRAGE SA
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