WO2023101619A1 - A glass panel for a cooking device and the manufacturing method thereof - Google Patents

A glass panel for a cooking device and the manufacturing method thereof Download PDF

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Publication number
WO2023101619A1
WO2023101619A1 PCT/TR2021/051260 TR2021051260W WO2023101619A1 WO 2023101619 A1 WO2023101619 A1 WO 2023101619A1 TR 2021051260 W TR2021051260 W TR 2021051260W WO 2023101619 A1 WO2023101619 A1 WO 2023101619A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass panel
transparent front
front panel
paint
glass
Prior art date
Application number
PCT/TR2021/051260
Other languages
French (fr)
Inventor
Ogun DUZGUN
Emre YENISARAC
Mustafa CELIKER
Original Assignee
Femas Metal San. Ve Tic. A.S.
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 Femas Metal San. Ve Tic. A.S. filed Critical Femas Metal San. Ve Tic. A.S.
Priority to PCT/TR2021/051260 priority Critical patent/WO2023101619A1/en
Publication of WO2023101619A1 publication Critical patent/WO2023101619A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F24C15/04—Doors specially adapted for stoves or ranges with transparent panels
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00—Methods for coating glass
    • C03C2218/30—Aspects of methods for coating glass not covered above
    • C03C2218/31—Pre-treatment
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00—Methods for coating glass
    • C03C2218/30—Aspects of methods for coating glass not covered above
    • C03C2218/32—After-treatment
    • C03C2218/328—Partly or completely removing a coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings

Definitions

  • the present invention relates to a glass panel with a transparent base and a method for producing a glass panel for household appliances, particularly cooking devices.
  • Various patterns are applied to the glass panels on household appliances. For example, company logos, icons, or geometric patterns are applied on the glass panel.
  • the process of providing the patterns applied to the glass panel on the glass panel is carried out by a laser.
  • a method of engraving a pattern on a glass panel by means of a laser is used to mark a body of material made of glass or plastic below its surface by means of a laser beam.
  • the patterns on the glass panel are eroded, and deformations may occur due to wear, time, and cleaning materials.
  • DE102008004995B3 discloses that a glass body has an upper surface and a lower surface with laser markings consisting of identifying numbers, letters or symbols.
  • the laser mark extends to a predetermined depth and is focused at a point within the glass.
  • the laser beam creates a material change which results in a visible mark on exposure to a secondary material change but without change to the glass surface.
  • the glass surface is hardened and has areas of compression and tension.
  • the object of the invention is to provide a glass panel for cooking appliances with a long service life.
  • the invention relates to a glass for a cooking appliance comprising a transparent front panel, an opaque layer provided on a back surface of the transparent front panel, and a pattern provided visibly accessible on the opaque layer.
  • the glass has a translucent paint layer provided at least partially covering the back surface of the opaque layer. Wear due to the use and cleaning may occur on the patterns formed on the glass panel.
  • the paint layer protects the patterns from external factors. In addition, deformations that may occur during cleaning and use are prevented, ensuring a long service life of the patterns on the glass panel.
  • the opaque layer is screen printing.
  • Screen printing can be applied to the base and is a particularly simple and inexpensive way of applying the opaque layer while also allowing particularly easy and precise adjustment of color.
  • the opaque layer has a high absorbance property against light waves. In this way, the contrast between the transparent front panel and the particularly darkened opaque layer is increased. In this way, increased color clarity is ensured.
  • the thickness of the transparent front panel is in the range of 3 to 25 mm.
  • the process steps applying a laser beam to a front wall of the transparent front panel in a way that etches a pattern space, covering the pattern space with paint on the front surface of the transparent front panel by blind stamping further comprising the process steps of closing the pattern space with the cold printing method and forming a paint layer on the back surface of the transparent front panel with the covering paint.
  • the process step includes a red laser beam to the front surface of the transparent front panel by a laser source.
  • a pattern gap can be created without damaging the transparent front panel surface.
  • the laser process takes a maximum of 10 ns by the laser source.
  • deformations that may occur while creating a pattern on the transparent front panel surface can be prevented.
  • forming a paint layer and applying the cold printing process by means of a screen-printing unit.
  • the ink layer is formed, and the cold printing processes can be carried out quickly and reliably.
  • the paint layer is formed, and the cold printing process steps are carried out by means of a rubber located in the screen-printing unit.
  • Figure 1 is a top view of the glass panel according to the subject matter invention.
  • Figure 2 is a front view of the inventive glass panel.
  • Figure 3 is a schematic illustration of the process step of applying laser treatment on the glass panel of the invention.
  • Figure 4 is a schematic illustration of the process step of applying cold pressure on the glass panel of the invention.
  • FIG 1 the glass panel of a cooking appliance (not shown) can be seen from a top view.
  • a transparent front panel (10) is located on the front part of the glass panel.
  • the transparent front panel (10) is a rectangular-like form comprising a front surface (12) and a back surface (14).
  • a paint layer (30) is located on an opposite surface of the opaque layer (20) corresponding to the transparent front panel (10). The paint layer (30) at least partially covers a front surface (32) of the opaque layer (20) in contact with the opaque layer (20).
  • the paint layer (30) and the pattern (22) on the opaque layer (20) are protected from external factors.
  • the visibility of the pattern (22) on the transparent front panel (10) is increased thanks to the paint layer (30).
  • the glass panel of the subject matter invention is shown from the front.
  • the pattern space (16) is formed by laser treatment and corresponds to the pattern (22) on the opaque layer (20).
  • the pattern space (16) delimits the pattern (22) around it.
  • the pattern space (16) may differ according to the preferred pattern (22) type.
  • the pattern space (16) in the form of an icon or company logo used as an example can be formed on the front surface (12) of the transparent front panel (10) by laser processing.
  • the process step of applying laser treatment on the glass panel of the invention is shown schematically.
  • the laser process enables the laser beams provided by a laser source (40) to form a pattern (20) on the opaque layer (20) and to create a pattern space (16) on the front surface (12) of the transparent front panel (10).
  • the laser beams provided from the laser source (40) are preferred, and red laser beams are preferred.
  • the laser beams applied from the laser source (40) are applied on the opaque layer (20) and the transparent front panel (10) for a duration of 10 ns.
  • the process step of applying cold pressure on the glass panel subject to the invention is shown schematically.
  • the pattern space (16) formed on the front surface (12) of the transparent front panel (10) is closed with a screen-printing unit (50) by cold printing.
  • the paint layer (30) is formed by the screen-printing unit (50) applying paint on the opposite surface of the opaque layer (20) corresponding to the surface facing the transparent front panel (10).
  • the screen-printing unit (50) includes a rubber (52) that enables the formation of the paint layer (30) and the cold printing process. Since the pattern space (16) formed in the preferred embodiment is a sensitive surface, a DB-S type rubber is used. Solvent-based paint, which can provide adhesion on glass, metal or plastic materials, is used to form the paint layer (30).
  • the curing time is set as 7 minutes, and the processing speed increases.
  • a solvent-based buffer paint may be used.
  • the curing time is set as 10 minutes.
  • UV paints that provide adhesion on glass and ceramic surfaces can be preferred.
  • the curing is processed at 390 nm. It is provided by the wavelength of UV rays.
  • the amount of paint used with the screen-printing unit (50) varies according to the screen-printing number used. After creating the pattern space (16) with the laser, a low number is preferred to cover the surface with a thick paint layer (30). 0.0016 g/cm2 paint is used with a low number screen printing number.
  • high-number screen printing is preferred if the surface is covered with thinner paint. In the high number of screen printing, paint is preferred with 0.0008 g/cm2.

Abstract

The invention relates to a glass for a cooking appliance comprising a transparent front panel (10), an opaque layer (20) provided on a back surface (14) of the transparent front panel (10), and a pattern (22) provided visibly accessible on the opaque layer (20), and a translucent paint layer (30) provided at least partially covering a back surface (24) of the opaque layer (20).

Description

A GLASS PANEL FOR A COOKING DEVICE AND THE MANUFACTURING METHOD THEREOF
TECHNICAL FIELD
The present invention relates to a glass panel with a transparent base and a method for producing a glass panel for household appliances, particularly cooking devices.
BACKGROUND OF THE ART
Various patterns are applied to the glass panels on household appliances. For example, company logos, icons, or geometric patterns are applied on the glass panel. The process of providing the patterns applied to the glass panel on the glass panel is carried out by a laser. A method of engraving a pattern on a glass panel by means of a laser is used to mark a body of material made of glass or plastic below its surface by means of a laser beam. However, the patterns on the glass panel are eroded, and deformations may occur due to wear, time, and cleaning materials.
DE102008004995B3 discloses that a glass body has an upper surface and a lower surface with laser markings consisting of identifying numbers, letters or symbols. The laser mark extends to a predetermined depth and is focused at a point within the glass. The laser beam creates a material change which results in a visible mark on exposure to a secondary material change but without change to the glass surface. The glass surface is hardened and has areas of compression and tension.
BRIEF DESCRIPTION OF THE INVENTION
The object of the invention is to provide a glass panel for cooking appliances with a long service life.
In order to achieve the above objective, the invention relates to a glass for a cooking appliance comprising a transparent front panel, an opaque layer provided on a back surface of the transparent front panel, and a pattern provided visibly accessible on the opaque layer. The glass has a translucent paint layer provided at least partially covering the back surface of the opaque layer. Wear due to the use and cleaning may occur on the patterns formed on the glass panel. The paint layer protects the patterns from external factors. In addition, deformations that may occur during cleaning and use are prevented, ensuring a long service life of the patterns on the glass panel.
In a preferred embodiment of the invention, the opaque layer is screen printing. Screen printing can be applied to the base and is a particularly simple and inexpensive way of applying the opaque layer while also allowing particularly easy and precise adjustment of color.
In a preferred embodiment of the invention, the opaque layer has a high absorbance property against light waves. In this way, the contrast between the transparent front panel and the particularly darkened opaque layer is increased. In this way, increased color clarity is ensured.
In a preferred embodiment of the invention, the thickness of the transparent front panel is in the range of 3 to 25 mm. Thus, it is ensured that the transparent front panel can withstand the applied pressure stress during the application of the laser process.
In a preferred application of the invention, the process steps applying a laser beam to a front wall of the transparent front panel in a way that etches a pattern space, covering the pattern space with paint on the front surface of the transparent front panel by blind stamping further comprising the process steps of closing the pattern space with the cold printing method and forming a paint layer on the back surface of the transparent front panel with the covering paint. In this way, the longevity of the patterns on the transparent front panel is ensured.
In a preferred application of the invention, the process step includes a red laser beam to the front surface of the transparent front panel by a laser source. Thus, a pattern gap can be created without damaging the transparent front panel surface.
In a preferred implementation of the invention, the laser process takes a maximum of 10 ns by the laser source. Thus, deformations that may occur while creating a pattern on the transparent front panel surface can be prevented.
In a preferred application of the invention, forming a paint layer and applying the cold printing process by means of a screen-printing unit. Thus, it is ensured that the ink layer is formed, and the cold printing processes can be carried out quickly and reliably. In a preferred application of the invention, the paint layer is formed, and the cold printing process steps are carried out by means of a rubber located in the screen-printing unit. Thus, the need for workers is reduced, and it is ensured that the paint layer is created quickly and safely in terms of occupational safety, and the cold printing process can be realized.
BRIEF DESCRIPTION OF THE FIGURES
Figure 1 is a top view of the glass panel according to the subject matter invention.
Figure 2 is a front view of the inventive glass panel.
Figure 3 is a schematic illustration of the process step of applying laser treatment on the glass panel of the invention.
Figure 4 is a schematic illustration of the process step of applying cold pressure on the glass panel of the invention.
DETAILED DESCRIPTION OF THE INVENTION
In this detailed explanation, the subject development of the invention is explained without any limitation and only with reference to examples to better explain the subject.
In Figure 1 , the glass panel of a cooking appliance (not shown) can be seen from a top view. A transparent front panel (10) is located on the front part of the glass panel. The transparent front panel (10) is a rectangular-like form comprising a front surface (12) and a back surface (14). There is an opaque layer (20) provided on the back surface (14) of the transparent front panel (10). There is a pattern (22) etched by laser processing on the opaque layer (20). Company logo, icon or geometric patterns can be selected as the pattern (22). A paint layer (30) is located on an opposite surface of the opaque layer (20) corresponding to the transparent front panel (10). The paint layer (30) at least partially covers a front surface (32) of the opaque layer (20) in contact with the opaque layer (20). The paint layer (30) and the pattern (22) on the opaque layer (20) are protected from external factors. In addition, the visibility of the pattern (22) on the transparent front panel (10) is increased thanks to the paint layer (30). In Figure 2, the glass panel of the subject matter invention is shown from the front. There is a pattern space (16) on the front surface (12) of the transparent front panel (10) located on the front surface of the glass panel. The pattern space (16) is formed by laser treatment and corresponds to the pattern (22) on the opaque layer (20). The pattern space (16) delimits the pattern (22) around it. The pattern space (16) may differ according to the preferred pattern (22) type. The pattern space (16) in the form of an icon or company logo used as an example can be formed on the front surface (12) of the transparent front panel (10) by laser processing.
In Figure 3, the process step of applying laser treatment on the glass panel of the invention is shown schematically. The laser process enables the laser beams provided by a laser source (40) to form a pattern (20) on the opaque layer (20) and to create a pattern space (16) on the front surface (12) of the transparent front panel (10). In the preferred application, the laser beams provided from the laser source (40) are preferred, and red laser beams are preferred. The laser beams applied from the laser source (40) are applied on the opaque layer (20) and the transparent front panel (10) for a duration of 10 ns.
In Figure 4, the process step of applying cold pressure on the glass panel subject to the invention is shown schematically. The pattern space (16) formed on the front surface (12) of the transparent front panel (10) is closed with a screen-printing unit (50) by cold printing. In addition, the paint layer (30) is formed by the screen-printing unit (50) applying paint on the opposite surface of the opaque layer (20) corresponding to the surface facing the transparent front panel (10). The screen-printing unit (50) includes a rubber (52) that enables the formation of the paint layer (30) and the cold printing process. Since the pattern space (16) formed in the preferred embodiment is a sensitive surface, a DB-S type rubber is used. Solvent-based paint, which can provide adhesion on glass, metal or plastic materials, is used to form the paint layer (30). In this way, the curing time is set as 7 minutes, and the processing speed increases. In an alternative embodiment, a solvent-based buffer paint may be used. When using solvent-based buffer paint, the curing time is set as 10 minutes. In another alternative embodiment, UV paints that provide adhesion on glass and ceramic surfaces can be preferred. When UV paint is preferred, the curing is processed at 390 nm. It is provided by the wavelength of UV rays. The amount of paint used with the screen-printing unit (50) varies according to the screen-printing number used. After creating the pattern space (16) with the laser, a low number is preferred to cover the surface with a thick paint layer (30). 0.0016 g/cm2 paint is used with a low number screen printing number. In an alternative embodiment, high-number screen printing is preferred if the surface is covered with thinner paint. In the high number of screen printing, paint is preferred with 0.0008 g/cm2. REFERENCE NUMBERS
10 Transparent Front Panel 40 Laser Sources
12 Front Surface 50 Screen-printing Unit
14 Back Surface 52 Rubber
16 Pattern Space
20 Opaque Layer
22 Pattern
30 Paint Layer
32 Front Surface
34 Back Surface

Claims

1- A glass for a cooking appliance comprising a transparent front panel (10), an opaque layer (20) provided on a back surface (14) of the transparent front panel (10), and a pattern (22) provided visibly accessible on the opaque layer (20) characterized in that a translucent paint layer (30) is provided at least partially covering a back surface (24) of the opaque layer (20).
2- A glass panel according to claim 1 , wherein the opaque layer (20) is a screen printing.
3- A glass panel in accordance with claim 2, wherein the opaque layer (20) has a high absorbance property against light waves.
4- A glass panel according to any one of the preceding claims, wherein the thickness of the transparent front panel (10) is in the range of 3 to 25 mm.
5- A production method for a glass panel according to any one of the previous claims, comprising the steps of applying a laser beam to a front wall (12) of the transparent front panel (10) in a way that to etch a pattern space (16), covering the pattern space (16) with a paint on the front surface of the transparent front panel (10) by blind stamping further comprising the process steps of closing the pattern space (16) with the cold printing method and forming a paint layer (30) on the back surface (14) of the transparent front panel (10) with the covering paint.
6- A production method for a glass panel in accordance with Claim 5, further comprising the process step of applying red laser beam to the front surface (12) of the transparent front panel (10) by a laser source (40).
7- A production method for a glass panel in accordance with claim 6, wherein the laser process takes a maximum of 10 ns by the laser source (70).
8- A production method for a glass panel in accordance with claims 6-7, characterized by the process step of forming a paint layer (30) and applying the cold printing process by means of a screen printing unit (60).
9- A production method for the glass panel in accordance with claim 8, wherein the paint layer is formed and the cold printing process steps are carried out by means of a rubber (62) located in the screen printing unit (60).
PCT/TR2021/051260 2021-11-22 2021-11-22 A glass panel for a cooking device and the manufacturing method thereof WO2023101619A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/TR2021/051260 WO2023101619A1 (en) 2021-11-22 2021-11-22 A glass panel for a cooking device and the manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2021/051260 WO2023101619A1 (en) 2021-11-22 2021-11-22 A glass panel for a cooking device and the manufacturing method thereof

Publications (1)

Publication Number Publication Date
WO2023101619A1 true WO2023101619A1 (en) 2023-06-08

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Family Applications (1)

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PCT/TR2021/051260 WO2023101619A1 (en) 2021-11-22 2021-11-22 A glass panel for a cooking device and the manufacturing method thereof

Country Status (1)

Country Link
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347763A1 (en) * 2003-10-14 2005-05-12 Bsh Bosch Siemens Hausgeraete Household oven unit has transparent door window with laser engraved internal scatters to create logo or markings
EP2977682A1 (en) * 2014-07-25 2016-01-27 Electrolux Appliances Aktiebolag Oven door, oven comprising an oven door and method for displaying information at an oven door
US20160169531A1 (en) * 2014-12-12 2016-06-16 Schott Ag Method for producing a glass ceramic element with patterned coating

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347763A1 (en) * 2003-10-14 2005-05-12 Bsh Bosch Siemens Hausgeraete Household oven unit has transparent door window with laser engraved internal scatters to create logo or markings
EP2977682A1 (en) * 2014-07-25 2016-01-27 Electrolux Appliances Aktiebolag Oven door, oven comprising an oven door and method for displaying information at an oven door
US20160169531A1 (en) * 2014-12-12 2016-06-16 Schott Ag Method for producing a glass ceramic element with patterned coating

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