DE102005022981A1 - Production of marble and/or colored patterned glass/glass-ceramic products comprises preparing two different colored glass melts, bringing the melts together, shaping, cooling and optionally making into a ceramic - Google Patents

Abstract

Production of marble and/or colored patterned glass/glass-ceramic products comprises preparing two different colored glass melts, bringing the melts together, shaping in the prescribed configuration of the product, cooling and optionally making into a ceramic. An independent claim is also included for a glass/glass-ceramic product produced by the above process.

Description

The The invention relates to a method for producing marbled and color-patterned glass products in continuous manufacturing processes.

The The invention further relates to a manufactured according to the aforementioned method Glass product or a glass ceramic product ceramized therefrom.

In marbled and manufactured in a continuous manufacturing process color-patterned glass products and glass ceramic articles ceramized therefrom typically made in such a way that initially a single-colored glass product in the desired geometric configuration is made, which subsequently with the desired one Color pattern is printed. Typical practical examples are colored Flat glass, designed as architectural glass and decorated glass ceramic plates for hobs.

Of the fundamental Disadvantage of this method is that the two-stage increase in cost noticeable and the subsequent application of the color pattern on the outer surface of the Glass product's product quality limited because the color pattern is directly exposed to all external influences.

By the EP 0 536 572 B1 It has become known to produce marbled or color-patterned flat glass products and glass ceramic articles ceramized therefrom without subsequent printing in such a way that glasses of different colors are brought into contact with one another. This is done in the known case in such a way that when forming the glass product in the still molten state on the surface of the dyed as a result of addition of metal oxides melt differently colored, previously prepared glass particles are distributed and melted in a surface layer. The green glass plate thus produced can then be subsequently ceramized in the usual way. In this way, a glass ceramic plate with a colored marbled or patterned surface can be produced.

This known method has the disadvantage that only a relatively thin surface layer can be marbled or patterned in color and that it is relative costly is. It has to be Stock of ground, colored Glass particles are kept in a tight time window with the green glass plate in their molten Condition are to be associated. Furthermore, the roughness of the Surface of the Glass product adversely affected by the scattered glass particles, partly because they are not complete in the surface layer plunge.

Of the Invention is based on the object, the initially described method to lead so that marbled or color-patterned glass / glass ceramic products on economic Way with a through-colored Marbling or structure and a smooth surface produced are.

• – Bereitstellen von mindestens zwei unterschiedlich farbigen Glasschmelzen,
• – Zusammenbringen der Glasschmelzen entsprechend der vorgegebenen Marmorierung und Musterung,
• – Formgeben der zusammengebrachten Glasschmelzen in die vorgegebene Konfiguration des Glasproduktes,
• – Abkühlen des geformten Glasproduktes, und
• – Optionales Keramisieren des geformten Glasproduktes zum vorgegebenen Glaskeramikprodukt.

The solution of this object is achieved according to the invention by a method for producing marbled and / or color-patterned glass / glass-ceramic products in a continuous production process with the following steps:

• Providing at least two differently colored glass melts,
• - matching the glass melts according to the given marbling and patterning,
• Shaping the matched glass melts into the predetermined configuration of the glass product,
• Cooling the molded glass product, and
• Optional ceramization of the molded glass product to the given glass ceramic product.

By matching different glass melts accordingly the desired color or Marmorierungsstruktur before the shaping step of the glass / glass ceramic product can in a continuous process and thus in an economic Process a continuous marbling or color structure in the Glass / glass-ceramic body are generated, wherein the roughness of the body surface is not affected.

According to the invention is characterized a glass / glass ceramic product made in a continuous Method process, which is marbled throughout and / or structured in color, available.

refinements The invention are in subclaims marked as well as result from the description of the figures.

Based an exemplary illustrated in the drawing in a single figure Plant is the invention, continuous Manufacturing process for producing marbled and color patterned Glass products described. The system preferably refers on a production with a flat glass pan with shaping of the flat glass product by rolling.

At the beginning of the plant are the melting units, consisting of melting tank and lautering. In the illustrated embodiment, a melting tank 1 provided, which by a longitudinal wall 2 in two parts of the tub 1a and 1b is disconnected. The two trough parts are inserts 3 associated with different mixtures, which lead to a differently colored glass.

It must be there be taken to ensure that the different colored glasses for the respective application in its essential properties, e.g. the coefficient of expansion, the UV and IR transmission, adapted so that in the product no resulting negative influences or even damages arise.

Alternatively to the illustrated single melting tank 1 with a divider 2 the melting process for the two melts can also take place spatially separated into two tanks with a common working trough.

Should in the glass product more than two colors are included is one appropriate number of tubs or tub parts necessary.

The melting tank 1 is over a flow and channel 4 with a work tub 5 connected, in which the two (or more) different colored glass melts, one of which may be undyed, brought together and then mixed. This can be done with moving stirrers, hooks, rods or similar functional equipment. It is also conceivable to add one of the glass melts (liquid as droplets or continuously) until shortly before the outlet nozzle of the working trough into the liquid glass mass of the other melt. The process is adapted depending on the desired appearance of the glass article, on the one hand, the conditionally reproducible patterns and textures arise, as well as intermediate stages of the two shades (eg beige and brown).

On the work tub 5 follows the forming step 6 , in which all the usual known glass-typical further processing, such as floating, rolling, drawing, production of wire glass, production of structured glass surfaces or production of hollow glass articles are carried out, in the illustrated example, the rolling of industrial flat glass (building glass) is in the foreground. Likewise, the method can also be applied to the dyeing of float glass with two or more differently colored melts, wherein a combination with clear glass is also conceivable. The mixing of the colors can also be done in one, the lip upstream mixing unit (Interface).

As well is the described method to all others, for industrial purposes Production of flat glass known methods (e.g., vertical and horizontal draw, rolls, with and without pattern, down draw method).

On the shaping stage, the cooling belt 7 and the decrease 8th of the finished glass product.

The produced by the method according to the invention Glass products are advantageously marbled throughout their entire thickness or patterned.

With the method according to the invention can marbled in a continuous process structured flat glasses are produced, which are not printed, but are colored through and e.g. can be used as building glass. Especially with this application shows a lasting coloring benefits across from printed discs.

Also can Green glass plates of glass ceramic plates for Hobs, for example, the standard marbled kitchen countertops (plastic / natural stone) adapted and modeled, so that the entire field of work in the kitchen a uniform surface image having.

By the continuous manufacturing process is a significant cost reduction in production and a significant increase in product quality in the frame the production of marbled and colored patterned glass products to reach.

One An essential difference to known melting processes lies in this case in that normally one possible high homogeneity only one color or colorless quality is desired, meanwhile in the case of the invention, the "marbling" or color pattern arrives.

Claims (11)

Method for producing marbled and / or color-patterned glass / glassware products in a continuous Manufacturing process with the steps: - Provide of at least two differently colored glass melts, - Bring together the glass melts according to the given marbling and patterning, - Shaping the merged glass melts in the given configuration the glass product, - cooling the molded glass product and - Optional ceramizing of shaped glass product to the given glass ceramic product. Process according to Claim 1, in which the two glass melts are separated into separate subchambers ( 1a . 1b ) a melting tank ( 1 ) to be provided. The method of claim 1 or 2, wherein the mixture the glass melts so chosen are that the glasses for the respective application in their essential properties are. Method according to one of claims 1 to 3, wherein both Stained glass melts are colored. Method according to one of claims 1 to 3, wherein only one provided molten glass is colored. Method according to one of claims 1 to 5, wherein the two glass melts in a working trough ( 5 ). The method of claim 6, wherein one of the glass melts just before the outlet nozzle the work tub is brought together with the other glass melt. The method of claim 6 or 7, wherein the bringing together the glass melts by moving stirrers, hooks, rods or similar Supported equipment becomes. Method according to one of claims 1 to 8, wherein the shaping by rolling the matched glass melts to a continuous one Flat glass band takes place. Method according to one of claims 1 to 8, wherein the shaping by floating the combined molten glass to a continuous one Flat glass band takes place. Glass / glass ceramic product, produced in a continuous Method process, which is marbled throughout and / or structured in color.