DE19647004A1 - Process for pressing glass screens - Google Patents
Process for pressing glass screensInfo
- 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- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/10—Construction 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
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)
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)
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 |
-
1996
- 1996-11-12 DE DE1996147004 patent/DE19647004A1/en not_active Withdrawn
-
1997
- 1997-11-08 WO PCT/EP1997/006140 patent/WO1998021738A2/en active Application Filing
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 |