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Apparatus for reducing radiative heat loss from a forming body in a glass forming process

A molding and equipment technology, applied in glass molding, glass molding, glass manufacturing equipment, etc.

Inactive Publication Date: 2014-12-10
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Eventually, these crystals grow long enough to break the glass flow and become defects

Method used

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  • Apparatus for reducing radiative heat loss from a forming body in a glass forming process
  • Apparatus for reducing radiative heat loss from a forming body in a glass forming process
  • Apparatus for reducing radiative heat loss from a forming body in a glass forming process

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Embodiment Construction

[0048] In the following detailed description, for purposes of explanation rather than limitation, example embodiments disclosing specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those of ordinary skill in the art having the benefit of this disclosure that the present invention may be practiced in other embodiments that depart from the specific details disclosed herein. In addition, descriptions of well-known devices, methods and materials may be omitted so as not to obscure the description of the present invention. Finally, wherever possible, the same reference numbers refer to the same elements.

[0049] In an exemplary fusion downdraw process for making glass sheets according to embodiments disclosed herein, glass-forming precursors (batches) are melted in a furnace to form molten raw material or glass melt, after melting the raw material or glass melt Flow over the forming body to form gla...

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Abstract

Disclosed is an apparatus for producing a glass sheet comprising lower thermal shields positioned below cooling doors for minimizing radiative heat loss from a forming body used to form a ribbon of molten glass from which a glass sheet is cut, and upper thermal shields positioned between the cooling doors and a root of the forming body for minimizing radiative heat loss from the forming body. The thermal shields are typically arranged as pairs and positioned on horizontally opposite sides of a flow of molten glass descending as a continuous ribbon from the forming body. Each thermal shield of the lower and upper thermal shield pairs may comprise a plurality of segments, including end segments and a central segment, wherein the end segments may be separately movable relative to the central segment, allowing an edge of the thermal shield adjacent the ribbon to be varied.

Description

[0001] Pursuant to 35 U.SC. §119, this application claims the benefit of priority to U.S. Provisional Application Serial No. 61 / 564062, filed November 28, 2011, hereby based on the contents of that patent application and the contents of that patent application Incorporated herein by reference in its entirety. technical field [0002] The present invention is directed to a method of reducing radiative heat loss during glassmaking, and in particular from a wedge-shaped forming body during fusion downdraw. Background technique [0003] The fusion downdraw process is a method used in glass manufacturing technology to produce sheet glass. Compared to other processes such as float and slot draw processes, the fusion process produces glass sheets with superior flatness and smoothness of the surface without the need for post-forming processing (grinding, polishing, etc.). Consequently, the fusion process becomes particularly important in the production of thin glass substrates, suc...

Claims

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Application Information

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IPC IPC(8): C03B18/04C03B18/18C03B18/02
CPCC03B17/067C03B17/064
Inventor O·N·伯拉塔瓦R·德利亚B·科卡图鲁姆S·R·马卡姆W·A·惠登
Owner CORNING INC
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