DE102006000985A1 - Antique sheet glass useful in the restoration of old buildings comprises a sheet of glass that has different thicknesses distributed over its surface and air bubble inclusions and glass defects on one side - Google Patents

Abstract

Antique sheet glass comprises a sheet of glass that has different thicknesses distributed over its surface and air bubble inclusions and glass defects on one side. Independent claims are also included for: (1) safety glass comprising films laminated between two sheets of antique glass as above; (2) producing antique sheet glass by distributing glass fiber mats and ceramic particles randomly on a refractory structuring plate in a furnace, placing a sheet of industrially produced sheet glass on the structuring plate, heating the furnace to 610-660[deg]C in 1 hour, cooling the furnace so that the glass can be removed at 60-80[deg]C, and cleaning and further processing the glass; (3) producing safety glass by applying talc between two or more sheets of glass, placing the sheets in exact alignment on a structuring plate and carrying out the above structuring process, opening out the sheets in exact alignment, and interleaving the sheets either with paper for storage purposes or with films for lamination; (4) producing curved antique glass by placing a sheet of antique or safetyl glass structured as above onto or into a preheated bending mold provided with a release material and bending the glass at 540-580[deg]C; (5) producing curved antique glass by placing a release powder in a sheet steel frame, settling old glass panes or fragments into the powder, smoothing out the powder between the old glass, placing a release material over the old glass, applying a release material to one side of a new sheet of glass, placing the new sheet on the old glass in exact alignment, heating the sheets in a bending furnace to form an impression of the old glass in the new glass, and separating the sheets.

Description

Handmade, one-piece or multi-pane antique flat glass or curved Antique glass made of industrially manufactured flat glass and process too its production.

The Flat glass production of the 17th and 18th century, only in 1906 has been replaced by the so-called glass drawing process, consists of the following Manufacturing steps. From the glassmaker were relatively large glass cylinder blown in a swivel pit. After cooling, the two ends were of the cylinder separated and the large-caliber tube along the side cut. Thereafter, the cylindrical tube was again until the Heated softening point and the upstanding ends bent down, thus one Shape plate. The underlay for this process formed one Iron plate, which was provided with a release agent. From above the glass plate was smoothed with wooden spatulas. With that could It can not be ruled out that the glass pane has a different thickness and an irregular-looking one slight waviness of the surface, trapped air bubbles and Glass defect possessed. By this method, only relatively small-area slices could be produced become.

In In the past, antique glasses were imitated, by imprinting a print with a textured roller into the viscous glass. However, one is constantly losing his temper repeating pattern in the glass.

Of the Invention is based on the problem, antique-looking flat glass from industrially produced flat glass, which is manufactured by a traditionally made windowpane of the late Middle Ages is hard to distinguish and continues the production of antique-looking laminated safety glass and bent antique glass, here especially for Restoration purposes to allow.

With the invention can be made an antique-looking window glass, without the very costly step of blowing a glass hollow cylinder is necessary in the production. It is manufactured industrially Flat glass, z. B. float glass for the Production of antique glass used. Due to the manufacturing method of the invention is a completely antique looking glass panel manufacturable, repetitive pattern are not available. Furthermore is also the production of an antique-looking laminated safety glass and curved glasses possible. From disc remains of old restoration discs can be an accurate Unwinding or an exact arbitrarily curved surface piece of an old disk simulated become. The production of a congruent disc is possible.

advantageous Embodiments of the invention are listed in claims 2 to 4. at The development according to claim 2, the flat glass pane an arbitrarily curved Patch. originals Antique discs have curvatures and are not absolute plan. This embodiment approaches so especially strong of the ancient form. According to claim 3 are two identical flat panes, but an antique replica assembled into a laminated safety glass. Consequently is also used in a laminated safety glass with its high strength the antique effect is achieved. In the development according to claim 4 this is possible even with arbitrarily curved surface pieces.

advantageous Process steps of the invention are defined in claims 7, 9 to 11 and 13 and 14 listed. In the development according to claim 7, the further processing the paired structured glass sheets to a laminated safety glass pane after the casting resin process performed. In the process development according to claim 9 becomes in the kiln first a sand filling applied dry by several centimeters, on the sand layer will or will be one or more fireproof panels with one high thermal shock resistance and low thermal expansion than Structuring plates placed. Especially when using several plates and through the sand pad there are slight deviations the plates with each other. This results in slight deviations in the bottom of the surface the glass pane to be structured. According to claim 10 are glass fiber plates or glass fleece used not with cut edges but torn edges. Thus arise flowing and no sharp-edged transitions from location to location. In the development according to claim 11, the introduction takes place the sheet glass in the kiln on a preheated structuring plate of about 50 ° C. Furthermore is for the glass defect production fine-grained Gravel or Schamotteabrieb used with mixed fine-grained graphite and used. In the development according to claim 13 is after the forming of the release agent removed the old disc and a new Flat glass pane by means of heat treatment adapted to the molded release agent. In the training after Claim 14, a second congruent disc bent and connected to a first pane to a safety glass pane or the old disc comes with a new curved disc connected to a safety glass pane.

Several embodiments The invention will be explained in more detail below.

The Antique flat glass according to the invention owns over the area distributes different thicknesses. So it's not completely flat. On one side of the disc are also air bubbles and glass defects arranged irregularly.

at the embodiment as laminated safety glass are two or more identical, d. H. previously jointly structured slices, with films for lamination Mistake. Here is also the pairwise further processing of the structured Flat glass panes according to the cast resin method possible.

The optimal manufacturing process of Antikglas glass is outstanding by the following method steps. Industrially manufactured Flat glass of any thickness, z. B. between 2 to 4 mm, is in a kiln structured and antique treated. In a kiln, gas-powered, electrically or with another source of energy, is first a sand filling introduced dry by several centimeters. On it are refractory, resistant against temperature changes Plates with low thermal expansion as structuring plate or plates, for. B. Corderitplatten laid. The oven is heated to about 50 ° C preheated. On the structuring plates become glass fiber mats or glass fleece with torn edges, so not cut, randomly in whole or in part on top of each other laid and small, fine-grained, ceramic components or fine-grained gravel with fine-grained graphite mixed and distributed indiscriminately. The flat glass pane will be on the Structuring plates and glass mats with the materials for the production the glass defect is launched. Subsequently, the structuring process by raising the furnace to thermal glass treatment in about 60 minutes to 610 ° to 660 ° C initiated and performed. Press at this temperature the ceramic materials and glass fibers of the glass fiber mats or the glass fleece on the underside of the sheet glass pane easily one, without sharp-edged prints to leave. The actual and technologically optimal temperature and also the holding time must be determined empirically depending on the kiln type and construction, different conditions exist. After cooling of the kiln, the thus deformed flat glass plate at about 60 ° to 80 ° C from the Kiln removed, then cleaned and supplied for further processing. It is important that no sharp-edged footprints on the underside of the glass arise, what else to crack and thus to destruction lead the glass could.

The Production method of anti-flat glass as laminated safety glass happens on similar Way as the previously described method. On the prepared Structuring plate will be two or more sheets of flat glass horizontally and exactly aligned. Beforehand between the flat glass panes with a powder bag very thin talcum applied as a release agent. The structuring process is now performed as described above. After the structuring process, the glass panes become an exact Mark unfolded, cleaned and for storage purposes provided with a paper liner or it will be the same Slides for the lamination interposed, with an exact superimposing the flat glass panes must be made as in the structuring process. To have to So the impressions generated by the structuring process congruent are opposite.

at the production process of bent antique flat glass as a single-piece or mehrscheibiges glass are those according to the inventive method structured glass sheets in a second step in the kiln on or in a preheated and provided with a release agent glass bending mold and at about 540 ° to 580 ° C accordingly the glass thickness and type of glass bent. As a release agent z. B. Glass fiber mats or glass fleece used with some strewn talcum. By the much lower bending temperature become the structuring glass from the first technological step, structuring not lifted again.

During restoration work, if possible, the old condition of the glass panes should be reached again. In this case, old glass panes often represent an arbitrarily curved area piece. In order to be able to carry out a reproduction that is as detailed as possible, the following method steps are proposed here. For this purpose, a pulverulent release agent is stored heap-shaped within a steel frame. The release agent is then distributed by hand about the shape of the old disc and adapted. The old disc or connected fragments are placed on the release agent and by slight pressure on the old disc and minor movements in the x and y direction, the release agent of the old disc is adjusted until a full-surface edition of the old disc occurs on the release agent. Then the lateral transitions of the old disc to the release agent are smoothed with a peel until old disc and release agent form a height. Now, a release agent is applied to the old disc and the new sheet to be bent glass plate provided on one side with a release agent and then placed the new disc with the release agent layer on the old disc exactly in balance. Subsequently, a heat treatment of the discs in the glass bending furnace after a predetermined thermal bending curve is presented taken until the upper disc is laying on the lower disc congruent by taking advantage of gravity. Subsequently, after the cooling of the discs, the contour of the lower disc is transferred to the upper disc and the discs are separated, cleaned and, if necessary, cut and ground.

When Variant can after adjusting the release agent to the old disc, the old disc are removed and a new flat glass disc is centered in Libra be hung up. Subsequently, a heat treatment as in the case described above, until the new disc applies the contour of the release agent. The further processing The now bent disc is carried out according to the previously described If.

to Production of laminated safety glass will either be a second congruent disc bent and processed into a safety glass or the old disc and the new curved disc becomes a laminated safety glass with foil or cast resin lamination processed.

Claims (14)

Antique flat glass, characterized in that the flat glass plate distributed over its surface has different thicknesses, that is not completely flat, and has on one side air bubbles inclusions and glass defects. Antique flat glass according to claim 1, characterized in that that the flat glass pane represents an arbitrarily curved surface piece. Multi-pane antique flat glass as laminated safety glass characterized in that two or more identical flat glass panes on one side over their area distributed have different thicknesses, so not completely flat and have on one side air bubbles and glass defects and inserted between the sheets of glass sheets for lamination are. Mehrscheibiges Antikglas glass according to claim 3, characterized characterized in that two or more identical flat glass panes an arbitrarily curved one Form surface piece. Process for the production of anti-flat glass, characterized characterized in that industrially produced flat glass in any Thickness is structured in a kiln and anticonditioned by a correspondingly cut flat glass pane on one in the kiln lying refractory structuring plate is placed, wherein before on the structuring plate glass fiber mats or glass fleece indiscriminately wholly or partly on top of each other laid and small, fine-grained, ceramic components were randomly distributed, then the Structuring process by raising the furnace to thermal glass treatment in about 60 minutes at 610 ° to 660 ° C. and at this temperature, the ceramic materials and glass fibers the glass fiber mats or the glass fleece on the underside of the flat glass pane push in easily, without sharp-edged prints to leave, and after the cooling of the kiln the sun deformed flat glass disc removed from the kiln at approx. 60 ° to 80 ° C, subsequently cleaned and supplied for further processing. Process for producing anti-flat glass as Laminated safety glass characterized in that two or more Flat glass panes horizontally and exactly superimposed on the prepared structuring plate, first of all between the flat glass panes with a powder bag very thin talcum is applied as a release agent, the structuring process after Claim 3 performed and after the structuring process, the glass sheets after a exact mark unfolded, cleaned and for storage purposes with a paper liner be provided or equal between the films for lamination being, being an exact superimposing the flat glass panes must be made as in the structuring process. Method according to Claim 6, characterized that the further processing of the pairwise structured flat glass panes after the casting resin process he follows. Process for the production of bent antique flat glass as a single-pane or multi-pane glass, characterized in that the glass panes structured in the first step according to claim 3 or 4 in a second step in the kiln on or in a preheated and provided with a release agent, such as. As glass fiber mats or glass fleece be placed with some strewn talc, glass bending mold and at about 540 ° to 580 ° C accordingly the glass thickness and type of glass are bent. Method according to claims 5 and 6, characterized in that that in the kiln first a sand filling is introduced dry by several centimeters, on the sand layer one or more refractory plates with a high thermal shock resistance and low thermal expansion, such as B. Corderit plates are placed as structuring plates. Method according to claims 5, 6 and 9, characterized in that that the glass fiber plates or glass fleece have torn edges. The method of claim 5, 6, 9 and 10, characterized characterized in that the introduction of the flat glass pane in the Kiln on a preheated Structuring plate of approx. 50 ° C done and that for the glass defect production fine grained gravel or Schamotteabrieb with mixed fine-grained graphite is used. Process for the production of bent antique flat glass as a single-piece or multi-pane glass in the shape of any curved surface piece after Template of old wheels or old wheel scraps, characterized that within a sheet steel frame, a powdery release agent pile shape is given, the release agent approximately the shape of the old disc distributed and adjusted, the old disc or fragments on the release agent is placed and by light pressure on the old disc as well as minor Movements in x- and y-direction adapted the release agent of the old disc becomes a full-surface edition the old disc on the release agent occurs, then be the lateral transitions of the old disc smoothed to release agent with a peel until old disc and release agent a height form a release agent is applied to the waste disk, the new sheet glass to be bent on one side with a release agent is provided and then The new disc with the release agent layer on the old disc exactly is placed in Libra and now a heat treatment of the slices in a glass bending oven after a given thermal bending curve is made until the top disc is taking advantage of gravity congruent on the lower disc and then after the cooling of the discs the contour of the lower disc on the transferred upper disc is, the discs separated, cleaned and cut if necessary and be sanded. Method according to claim 12, characterized in that that after adjusting the release agent to the old disc, the old disc is removed and placed a new flat glass plate in the middle in Libra and then a heat treatment as in the preceding claim, until the new one Disc of the contour of the release agent applies and further processing the now bent disc according to the preceding one Claim takes place. Method according to claims 12 and 13, characterized that a second congruent disc bent and turned into a safety glass is processed or the old disc and the new curved disc is processed into a safety glass pane.