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Method and device for forming of glasses and/or glass ceramics

A technology for glass ceramics and glass, which is applied in the field of raw glass for processing glass ceramics, and can solve the problems of incompatibility, oxidation, adhesion to molds, etc.

Inactive Publication Date: 2004-07-07
SCHOTT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you want to heat the glass on the mold, you have to use short-wave infrared radiation. For short-wave infrared radiation, because most of the glass is transparent, most of the incident radiation passes through the glass and reaches the steel mold, because the reflectivity of steel is low. , so it can absorb a considerable part of the incident radiant energy, and as a result the mold becomes very hot, which will cause the glass to adhere to the mold very quickly, which will cause the mold to oxidize (produce scale) when it is subsequently heated, so it is made of steel molds are not suitable for molding processes that utilize short-wave infrared radiation heating

Method used

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  • Method and device for forming of glasses and/or glass ceramics
  • Method and device for forming of glasses and/or glass ceramics
  • Method and device for forming of glasses and/or glass ceramics

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Embodiment Construction

[0021] figure 1 A detail of a mold 1 for producing a baked shell is shown in . The mold 1 has a forming surface with a horizontally running bottom surface 1.1 in the present example, a side surface 1.2 and a support surface 1.3. The mold 1 in this example is made of metal with a reflectivity of 90% and a high thermal conductivity. The advantage of this is that the temperature distribution on the mold is uniform, which is beneficial to ensure the quality of the product to be manufactured.

[0022] A glass pane 2 is placed on the mold 1 , the glass pane 2 having exactly the same rectangular shape as the mold 1 in top view, the glass pane 2 resting with its peripheral region on the support surface 1 . 3 of the mold 1 .

[0023] Heater 3 is an important element, which includes a short-wave infrared radiation device with a color temperature of 2500K. The glass plate 2 has a thickness of 3.7 mm and a width of 250 mm, it is at a distance of 55 mm from the radiation emitter of the ...

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Abstract

The invention relates to a method and device for the forming of bodies (2) made from glass or glass ceramic in order to produce a three-dimensional end product. A short-wave IR radiation is thus used, furthermore a mould for forming a three-dimensional body made from glass or glass ceramic. According to the invention, the mould is made from a material with a high reflectivity or a high degree of remission thus cooling the mould.

Description

technical field [0001] The present invention relates to a method and apparatus for shaping glass and / or glass ceramics, and in particular to a method and apparatus for shaping raw glass for processing glass ceramics using short-wave infrared radiation. Background technique [0002] Such heating and / or shaping methods are described in detail in DE 19938808 A1, DE 19938807 A and DE 19938811 A1. The final target product is a three-dimensionally formed object, such as a baking mold for a kitchen, a washing tank or a hood. Three-dimensional shaped objects of the type described are produced, for example, from flat glass in the method. The degree of shaping is a function of the magnitude of the shape change of the three-dimensional object as seen on a cross-sectional view through the entire three-dimensional object. An example is a baking mold which has a baking cavity which has a profile with a bottom area, inclined surrounding walls and a flat rim area. The degree of forming b...

Claims

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Application Information

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IPC IPC(8): C03B23/025C03B29/02
CPCC03B23/0258C03B29/025
Inventor 乌尔里克·福瑟林汉姆豪克·埃斯曼伯恩德·霍普安德烈亚斯·赫希德克·韦德曼索拉尔夫·约翰森
Owner SCHOTT AG
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