JP2005097108A - Method for producing rolled glass plate or glass-ceramic plate with partially deformed small sections - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical method for producing a rolled glass plate or glass-ceramic plate with a thickened boundary and/or a touch-sensitive marking and a guide element for conforming to a user. <P>SOLUTION: When the rolled glass plate or the glass-ceramic plate ceramicized from the glass plate with partially formed small sections at a boundary forming part and the marking for teaching to the user is produced, the corresponding boundary forming part having the shapes of a built dimple and a bulged portion and/or a touch-sensitive teaching structure to the user as a part of the shaped glass plate at rolling is rolled at the upper operating surface of the glass plate by a corresponding roller. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention produces a rolled glass plate or a glass ceramic plate ceramicized from the glass plate with a small area partially deformed in the form of a user-provided boundary formation and / or marking. Regarding the method.

Glass plates or glass ceramic plates are usually used as cooking plates in modern cooking hobbies.
Cooking hobs with glass or glass ceramic cooking plates or covers have been known from the prior art for many years. Hobbs with glass-ceramic cooking plates are accepted in the market because of their special advantages, especially the smooth surfaces that can be easily cleaned. Glass-ceramic cooking plates are especially used to heat cooking parts with both an electric cooking part and a gas burner, i.e. an atmospheric gas burner mounted on the cooking plate and a radiant burner under the cooking plate. The Recently, induction heating appliances have become increasingly popular.

Indirect cooking of food, i.e. using this glass ceramic to heat food in a cooking pan, as well as glass ceramic cooking plates to cook food directly, e.g. when grilling It can also be used.
The glass ceramic plate of the cooking plate is usually manufactured in a continuous melting process where the starting glass is first rolled to its nominal thickness and cut to the appropriate cooking plate dimensions. In this state, the starting material is called raw glass. Further edge processing, drilling and decoration and final heat treatment, ceramization are performed in the second manufacturing step. In this process step, a glass ceramic with its properties (high thermal stability and low thermal expansion) is produced from raw glass.

  Commercial cooking hobbs with glass plates or glass ceramic plates as cooking plates (also known as covers or support plates in the case of gas hobbs with atmospheric burners) usually have a continuous flat surface. However, for many cooking appliance designs, it has been found that the use of flat cooking plates can be quite expensive or can only be designed for cooking appliances with limited use. Therefore, there are a number of known proposals for improving the cooking plate by partial deformation. For this reason, glass plates or glass ceramic plates having small regions that are partially deformed are becoming increasingly commercially important.

  One of the typical problems described above occurs in the case of a perforated edge of a cooking plate that is open, i.e., has holes that accommodate the atmosphere, gas burner. This type of hob needs to prevent food from overflowing or liquid from flowing around the perforated edge with a separate sealing liner. In this regard, as an alternative to sealing liners, creating a perforated boundary where a perforated boundary with a complex bending process is bent upward, ie as shown in DE 19813691 C1, for example. Is also known. In this case, it is a flat glass plate at the starting point, the glass plate is perforated and reheated in a subsequent manufacturing process using shortwave infrared in the area of the perforated hole, and then properly shaped The perforation boundary is bent with the tool using a known shaping process. This subsequent manufacturing process has a significant adverse effect on economic productivity, especially in the case of mass production. This partially deformed glass plate may be a finished product, or as a green product, it may then be ceramized using a known heat treatment step to form a glass ceramic plate. The glass plate can also be modified to become a glass dish.

Furthermore, it is known from EP 087997A1 that if the glass plate is for gas cooking plates and there is a perforated boundary to be bent upwards, it is simply bent upwards by gravity by means of a support ring arranged below during ceramization. Even without another forced deformation, the thickness of the material varies in the bending region, although it can produce a very small degree of deformation.
On the one hand, another preferred variant for preventing the spilled food outflow and in particular on the other side forming a frameless border protection is to form a boundary bead at the periphery of the glass plate or glass ceramic plate. A glass plate or glass ceramic plate of this kind is described in DE 10041006 C2. In this known case, the glass plate is heated in the raw state, the boundary area is heated, and the boundary area is turned over or deformed by the shaping tool so that a bead-like boundary area is formed. The raw glass plate can then be ceramicized.

Even in this case, the manufacturing process after reheating and deforming, as in the case of the above-mentioned known process for forming a perforated boundary part that is integrally formed and bulged, has a considerably bad influence on the economy, especially in the case of mass production. is there.
Another problem with cooking plates is expressed in the application of user teaching markings. This kind of marking on cooking plates as an adaptation aid is now customarily added as a decoration. The depth of this decoration is only a few μm, so that such markings are perceptible to the eye but not visible to the touch, and as a result are unrecognizable to the blind.

  The present invention is implemented in a process as described in this introduction so that rolled glass / glass ceramic plates with thickened boundaries and / or user-friendly markings and guide elements can be economically manufactured. The purpose is that.

According to the invention, the object is to provide a rolled glass plate with a small area partly formed in the form of a boundary-forming part and a marking for user teaching or a glass-ceramic plate ceramicized from the glass plate. As part of the shaping of the glass plate during the roll operation, markings for user teaching and boundary forming parts as teaching elements and / or structured depressions and ridges are made of glass by corresponding constituent rollers. This is accomplished by rolling the plate over its operational upper surface.
Thus, thanks to the method according to the present invention, reheating and deformation for applying user teaching rims and structures, including those for the blind, to glass plates or glass ceramic plates economically ceramicized therefrom. This eliminates the need for a subsequent manufacturing process. In the case of a border around the hole, this border is manufactured in the form of a thickened glass plate in order to form a reliable defense against such overflowing food. This thick part can also be rolled as an outer boundary of the glass plate. In the case of user teaching, a tactile indentation or ridge embossed from the cooking plate material can form a teaching element including for blind users.

From DE19906911C1, to roll the step in the height direction, when rolling the raw glass plate, the raw glass plate for the glass ceramic cooking plate is rolled by the corresponding stepped roller, whereby the subsequent cooking plate Is known to delineate from the actual cooking area, but this document does not suggest anything regarding boundary formation and user-teaching constructs.
Improvements of the invention are indicated in the dependent claims and can be seen from the description of the drawings.
The invention will be described in more detail on the basis of the specific embodiments shown in the drawings.

BEST MODE FOR CARRYING OUT THE INVENTION

  FIG. 1 in conjunction with the cross-sectional view AA shown in FIG. 2 is a specific embodiment of a glass or glass with four openings 2, 2 ′ serving to accommodate an atmospheric gas burner (not shown). A glass ceramic plate 1 is shown. This opening may change shape. For example, the opening may be a circle, an ellipse, a polygon, or a polygon with rounded corners. This opening has a rolled boundary bead 2a that serves as a defense against overflow, i.e. prevents overflowing food or cooking liquid from entering the hob. The thickness “d” of this plate is usually 3 to 6 mm. The height “h” of the boundary bead is usually 1 to 2 mm. Opening 2 is shown with a boundary bead 2a, while opening 2 'is shown without a boundary bead.

FIG. 3 shows the steps involved in the preferred manufacture of the opening 2 of the glass / glass ceramic plate shown in FIG. At a position where the opening of the glass plate 1 is to be formed, a desired narrow circular breaking portion 3 corresponding to the contour that will later become the opening 2 is rolled onto the glass plate 1 together with the portion thickened as a boundary.
A thick part of the rolled boundary and a preferred embossed breaking site 3 are shown on the basis of the two embodiments of FIGS. 3A and 3B, which are narrower in the embodiment according to FIG. The area is preferably very thin compared to the embodiment shown in FIG. In the case of the embodiment shown in FIG. 3, the narrowed preferred breaking site is moved to the boundary region of the preferred breaking site and at the same time forms a boundary bead 2a.

Thereafter, the narrowed and preferred breaking site of the plate 1 is scored using known methods, for example using a cutting wheel or a laser beam. Next, a mechanical force is applied to the inside of the preferred breaking site, or between the inside of the broken site and the area around the preferred breaking site, the inside of the broken portion is preferably cooled or rapidly cooled to achieve this predetermined value. It is broken by applying a temperature difference by heating the area around the destruction site. After the inner region of this predetermined breaking site has been breached, the opening 2 is formed, and if necessary, the hole including the boundary is similarly polished using known methods.
A glass plate 1 having a finishing opening 2 and a boundary bead 2a is shown in FIG. This figure corresponds to FIG.
This glass plate can be ceramicized to form a glass ceramic plate. This ceramization can also be carried out prior to nicking the preferred breaking site.
The opening can also be manufactured in a conventional manner by drilling or cutting with spray water.

4 (A) to 4 (D) show a glass or glass-ceramic plate 1 that functions as a cooking plate and has a border bead rolled as an edge and spill protection. FIG. 4A shows the plate 1 in which the boundary bead 4 is rolled to the opposite edge. FIG. 4B shows a plate 1 with a boundary bead 4 running around the entire periphery.
FIG. 4C shows the cross-sectional shape of the boundary bead 4. The thickness “d” of the plate 1 is about 3 to 6 mm, the edge height is “h” is 1 to 2 mm, and the width “b” of the boundary bead 4 is about 3 to 60 mm.
FIG. 4D corresponds to FIG. 4C, but shows boundary bead formation in which the groove 4a is rolled to the lower boundary region of the plate.
As a modification of the drawings shown in FIGS. 4A and 4D, the boundary bead 4 can be rolled only on one side or on three sides.

Figures 5 (A) to 5 (G) show other possible boundary shapes of the rolled glass / glass ceramic plate of the cooking plate, this shape being entirely around or only on one side, Rolled to cooking plate on side or three sides.
FIG. 5A shows a cooking plate 1 having a wide facet boundary 5 for preventing outflow and a web 5a inclined downward. FIG. 5B shows a cooking plate having a shallow narrow portion 6 on the lower side that can function as a display cover.
The glass / glass ceramic plate (cooking plate) 1 shown in FIG. 5 (C) has a boundary bead 4 that gradually rises towards the edge and then falls at a right angle at the edge.

The glass / glass ceramic plate 1 shown in FIG. 5 (D) has a wide knob-like boundary bead 4.
FIG. 5 (E) shows a glass / glass ceramic plate 1 with a wide web area under which switches and display elements can be placed and a further rolled web responsible for another separation of the cooking plate. Yes. Switches or display elements can be arranged in this area as well. It can be just a transition area.
The plate 1 shown in FIG. 5 (F) has a groove-shaped embossing forming portion 7 to prevent outflow. The shape shown in FIG. 5G basically corresponds to the shape shown in FIG. 4D, and the boundary bead 4 is flattened to form the small surface 4b.

Three FIGS. 6A, 6B, and 6C show three different shapes of the hole boundary. FIG. 6A shows a hole boundary 2a that prevents spilled food thickened into a bead shape according to the embodiment shown in FIG. FIG. 6B is the same hole boundary as FIG. 6A, but includes a directly adjacent narrowed region 2b, which may be made for the production of thick edges. FIG. 6 (C) shows the hole boundary shown in FIG. 6 (A) and a groove region 2c that is rolled for positioning or fixing the virtues.
The following drawings show the various rolled complete structures and markings for user teaching.

For example, FIG. 7 shows a glass / glass ceramic plate 1 with a structure consisting of four hollow recesses 8 around the hole 2 of the gas burner for positioning the virtues of a gas cooking appliance.
FIG. 8 shows a glass / glass ceramic plate 1 with a hollow area 9 as a positioning aid for a touch control switch arranged in this area.
FIG. 9 shows a glass / glass ceramic plate 1 of a cooking plate in which a raised or recessed rolled cross area 10 is used as a positioning aid for a residual heat indicator.
FIG. 10 shows a glass / glass ceramic plate 1 of a cooking appliance with a raised or recessed rolled positioning mark 11 intended for the blind.
FIG. 11 shows a glass / glass ceramic cooking plate 1 with a raised or recessed rolled groove 12 as a tactile direction line that guides from a control area 13 to a corresponding heating area. ing.

Finally, FIG. 12 shows a glass / glass-ceramic cooking plate 1 which is a Braille braille 14 which is preferably rolled in the control area 18 and thereby allows a blind user to operate the hob independently. ing.
It will also be appreciated that the methods individually illustrated in the above figures can be implemented in various combinations.
Furthermore, the problem dealt with here arises from a glass / glass ceramic cooking plate, but in principle is not limited thereto.

FIG. 3 shows a perspective view of a glass or glass ceramic plate for a gas cooking hob having an aperture with a boundary bead rolled to accommodate an atmospheric gas burner. Sectional drawing of the opening with a boundary bead corresponding to sectional line AA is shown. (A)-(C) shows the order at the time of manufacturing the opening with a boundary bead. (A)-(D) shows the formation of a rolled boundary bead with a glass / glass ceramic plate as an edge and spill prevention. (A)-(D) show other possible rolled boundary shapes for glass / glass ceramic plates as an alternative to FIG. (A)-(C) shows the boundary part by which the roll of the various shape of the glass / glass ceramic cooking plate was rolled and perforated. Figure 3 shows a rolled glass / glass ceramic cooking plate containing a pan support for gas cooking appliances. Figure 3 shows a glass / glass ceramic cooking plate with a stamped hollow area as a positioning aid for a touch control switch. Shown is a glass / glass ceramic cooking plate with a rolled cross area as a positioning aid for the remaining heat indicators. Fig. 2 shows a glass / glass ceramic cooking plate with a rolled positioning mark for a blind person. Figure 3 shows a glass / glass ceramic cooking plate with a rolled direction line for user teaching leading from the control area to the cooking zone. Figure 2 shows a glass / glass ceramic cooking plate with a braille rolled field functionally assigned to the control area.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Glass plate or glass ceramic plate 2 Opening 2a Boundary bead 3 Destruction site 4 Boundary bead 5 Facet boundary portion 6 Shallow narrow portion 8 Depression 9 Hollow region 10 Cross region 11 Positioning mark 12 Groove 13 Control region 14 Field

Claims (15)

  In a method of manufacturing a rolled glass plate with a small area partially formed in the form of a boundary forming portion and a marking for user teaching, or a glass ceramic plate ceramicized from the glass plate, the glass during roll operation As part of the shaping of the plate, the boundary constructions in the form of correspondingly constructed depressions and ridges and / or user-touchable structures are rolled onto the functional upper surface of the glass plate by corresponding construction rollers. A method characterized by that.   The method of claim 1, wherein the boundary bead is rolled around an opening further formed in the glass plate. The method of claim 2, wherein the opening is manufactured.
-Forming a narrow closed closed desired separation location with boundary bead rolling, corresponding to the shape of the opening during shaping of the glass plate in the molten state;
Slicing into this narrowed desired separation location of the cooled glass plate, glass ceramic plate if processed;
-Destroying the interior of the cut at the desired break location;
A method comprising polishing, if necessary, a hole forming an opening including the boundary.   3. A method according to claim 1 or claim 2, wherein a boundary bead is rolled on at least one edge of the glass plate as edge protection and spill prevention.   5. The method according to claim 1, wherein the groove containing the sealing element is rolled under the glass plate in the glass plate boundary region.   6. A method according to any one of the preceding claims, wherein at least one edge is rolled as a flat facet with an anti-spill web.   6. A method according to any one of the preceding claims, wherein the glass plate is rolled at at least one edge so as to gradually rise towards the border region.   The method according to any one of claims 1 to 5, wherein the boundary region of the glass plate is rolled in the shape of a knob.   The method according to any one of claims 1 to 5, wherein a groove-like depression is integrally formed around a boundary region of the glass plate and / or around an opening of the glass plate to prevent outflow.   10. A method according to any one of claims 1 to 9, wherein in each case the depressions for containing the virtues are rolled around a glass plate opening intended for a gas cooker.   11. A hollow recess for positioning a switch element is rolled in the area of the glass plate intended for use as a cooking plate for a cooking hob. Method.   12. A cruciform depression as a positioning aid for a residual heat indicator is rolled into the area of the glass plate intended for use as a cooking hob cooking plate. The method described.   The method according to any one of claims 1 to 12, wherein a positioning mark for a blind person is rolled on the glass plate.   The method according to any one of claims 1 to 13, wherein a direction line for user teaching is rolled on the glass plate. 15. Braille teaching and display field, functionally assigned to individual operations, are rolled into a control area behind the glass plate for use as a cooking plate for a cooking hob. The method of any one of these.

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