DE19647004A1 - Process for pressing glass screens - Google Patents

Process for pressing glass screens

Info

Publication number
DE19647004A1
DE19647004A1 DE1996147004 DE19647004A DE19647004A1 DE 19647004 A1 DE19647004 A1 DE 19647004A1 DE 1996147004 DE1996147004 DE 1996147004 DE 19647004 A DE19647004 A DE 19647004A DE 19647004 A1 DE19647004 A1 DE 19647004A1
Authority
DE
Germany
Prior art keywords
glass
mold
preheated
screen
molded parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE1996147004
Other languages
German (de)
Inventor
Wilhelm Koenig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE1996147004 priority Critical patent/DE19647004A1/en
Priority to PCT/EP1997/006140 priority patent/WO1998021738A2/en
Publication of DE19647004A1 publication Critical patent/DE19647004A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06Construction of plunger or mould
    • C03B11/10Construction of plunger or mould for making hollow or semi-hollow articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention relates to two measures for improving the surface quality of the display surface of a display screen thereby making any further processing unnecessary. Firstly, the form is divided into two parts that can be easily processed so as to improve the surface quality of the form in the visual area section. Secondly, a glass panel is placed in the form which prevents the flowing of additionally fed glass droplets to the surface of the form.

Description

Stand der Technik der Bildschirmherstellung ist das Pressen ei­ nes Bildschirms in einteiligen Formen, mit anschließenden Schleifen und Polieren der Sichtfläche des Bildschirms. Die Nachbearbeitung ist erforderlich, da die Oberflächenbeschaffen­ heit des Glaskörpers nicht den Anforderungen der Darstellung auf der Sichtfläche entspricht.The state of the art in screen production is pressing nes screen in one-piece forms, with subsequent Grinding and polishing the visible surface of the screen. The Post-processing is necessary because the surface is procured the vitreous does not meet the requirements of the representation on the visible surface.

Die Oberflächenbeschaffenheit derartiger Glasgegenstände hängt von zwei entscheidenden Kriterien ab, erstens der Oberflächen­ beschaffenheit der Form, und zweitens von dem Kontaktverhalten des mit hoher Temperatur behafteten Glastropfens zur relativ kalten Form, in der das Glas erhebliche Fließwege bewältigt. Die Innenfläche des Glasartikels z. B. hat eine ausreichende Qualität, da der Stempel 6 als konvexes Formteil gut zu bear­ beiten ist. Ganz anders ist das bei der konkaven Form 3, 4 wenn sie einteilig ist. Der Sichtbereich des Bildschirms ist eine Kugel-Kalotte, die an sich eine gute Bearbeitbarkeit bietet.The surface quality of such glass objects depends on two decisive criteria, firstly the surface quality of the shape, and secondly the contact behavior of the glass droplet, which is subject to high temperatures, to the relatively cold shape, in which the glass copes with considerable flow paths. The inner surface of the glass article z. B. has a sufficient quality, since the stamp 6 as a convex molding is easy to work bear. It is quite different with the concave shape 3 , 4 if it is in one piece. The viewing area of the screen is a spherical cap, which in itself offers good workability.

Zur Bewältigung der Problematik des ersten Kriteriums, Oberflä­ chenbeschaffenheit der Form, muß die Form in den Kalottenteil 4 und den Randteil 3 aufgeteilt und nach Fertigstellung mit hoch­ feiner Polierbearbeitung des Sichtbereiches werden die beiden Formenteile zu einer Form durch den Formenboden verbunden.In order to cope with the problem of the first criterion, surface quality of the shape, the shape must be divided into the dome part 4 and the edge part 3 and after completion with high-precision polishing of the viewing area, the two mold parts are connected to form the mold base.

Aus der sphärischen Linsenherstellung in der optischen Indu­ strie sind Blankpressverfahren bekannt mit denen Oberflächen­ qualitäten erreicht werden die selbst für optische Zwecke aus­ reichen. Die Formenteile werden im duktilen Einkornverfahren bearbeitet. Die Rohlinge sind in der Regel vorgefertigt und werden nach Rückerhitzung blankgepreßt. Die Rohling Vorferti­ gung erspart störende Fließvorgänge in der Blankpreßform.From spherical lens production in the optical indu Blank press processes are known with which surfaces qualities are achieved even for optical purposes pass. The molded parts are made using the ductile single-grain process processed. The blanks are usually prefabricated and are pressed bright after reheating. The blank prefabricated supply saves disturbing flow processes in the blank press mold.

Diese Rohlingmethode zur Lösung des zweiten Kriteriums, der Fließwellenbildung, auf einen begrenzten Bereich angewendet, heißt einen vorgeheizten Rohling 2 in die Form 3, 4 einlegen und ein Fließen oder Strömen des Tropfen auf dem Sichtbereich der Form zu verhindern.This blank method for solving the second criterion, flow wave formation, applied to a limited area means inserting a preheated blank 2 into the mold 3 , 4 and preventing the drop from flowing or flowing on the visible area of the mold.

Verfahrensschritte:Process steps:

Pos 1 Die vorgeheizte Scheibe 2 wird durch den Vakuumhalter 1 zur Form transportiert.Pos 1 The preheated disc 2 is transported to the mold by the vacuum holder 1 .

Pos 2 Die Form bestehend aus dem Randteil 3 und dem Sichtbe­ reichsteil 4, zusammengehalten und einteilig gemacht durch den Boden, ist zur Aufnahme der vorgeheizten Scheibe bereit.Pos 2 The form consisting of the edge part 3 and the Blickbe rich part 4 , held together and made in one piece by the bottom, is ready to receive the preheated disc.

Pos 3 Die vorgeheizte Scheibe wird in der Form abgelegt.Pos 3 The preheated pane is placed in the mold.

Pos 4 Der Glastropfen wird auf die vorgeheizte Scheibe gegeben und verbindet sich mit dieser.Pos 4 The glass drop is placed on the preheated pane and connects to it.

Pos 5 Der Glastropfen wird durch den Stempel 6 zum Bildschirm ausgepreßt der Deckring 7 schließt dabei den oberen Formenrand ab.Pos 5 The glass drop is pressed out by the stamp 6 to the screen, the cover ring 7 closes off the upper mold edge.

Der Pressvorgang muß sehr präzise ablaufen um die stark rücker­ hitzte Scheibe nicht auseinander zu pressen. Des weiteren muß eine Blasenbildung verhindert werden.The pressing process must be very precise in order to get the strong back heated disk not to press apart. Furthermore, must blistering can be prevented.

Claims (2)

1. Verfahren zum Pressen von Bildschirmen aus Glas dadurch gekenn­ zeichnet, daß die Pressform zwei- oder mehrteilig gestaltet ist in einen Teil der die Sichtfläche des Bildschirmes formt und die übrigen Formteile den unsichtbaren Randbereich formen, wo­ bei das Teil mit dem Sichtbereich ohne die übrigen Formteile eine geometrische Beschaffenheit erhält, die eine optimale Oberflächenbearbeitung zuläßt.1. Process for pressing screens made of glass characterized in that the mold is designed in two or more parts in a part that forms the visible surface of the screen and the other molded parts form the invisible edge area, where the part with the visible area without the rest Molded parts receive a geometric texture that allows for optimal surface processing. 2. Nach 1, dadurch gekennzeichnet, daß in die Form zur Verhinde­ rung von Fließvorgängen des später hinzuzugebenden Glastropfen eine vorgeheizte, dünne Glasscheibe eingelegt wird, die sich mit dem später verpreßten Glastropfen vollständig verschweißt und verbindet.2. After 1, characterized in that in the form for prevention flow of the glass drop to be added later a preheated, thin glass plate is inserted, which is completely welded to the later pressed glass drop and connects.
DE1996147004 1996-11-12 1996-11-12 Process for pressing glass screens Withdrawn DE19647004A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1996147004 DE19647004A1 (en) 1996-11-12 1996-11-12 Process for pressing glass screens
PCT/EP1997/006140 WO1998021738A2 (en) 1996-11-12 1997-11-08 Method for pressing glass display screens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996147004 DE19647004A1 (en) 1996-11-12 1996-11-12 Process for pressing glass screens

Publications (1)

Publication Number Publication Date
DE19647004A1 true DE19647004A1 (en) 1998-05-14

Family

ID=7811612

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996147004 Withdrawn DE19647004A1 (en) 1996-11-12 1996-11-12 Process for pressing glass screens

Country Status (2)

Country Link
DE (1) DE19647004A1 (en)
WO (1) WO1998021738A2 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4419119A (en) * 1978-04-26 1983-12-06 Poundstone William W Method of forming multifocal lens blank
FR2622881B1 (en) * 1987-11-06 1993-05-28 Nippon Sheet Glass Co Ltd PROCESS FOR THE MANUFACTURE OF GLASS OBJECTS HAVING A SMOOTH SURFACE
US5213603A (en) * 1992-03-16 1993-05-25 Corning Incorporated Flexible plunger apparatus for a glass forming machine

Also Published As

Publication number Publication date
WO1998021738A2 (en) 1998-05-22
WO1998021738A3 (en) 1998-08-27

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Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee