JP6905675B2 - Glass top plate for stove and its manufacturing method - Google Patents

Description

The present invention relates to a glass top plate for a stove as a component of a gas stove, an IH stove, and the like, and a method for manufacturing the same.

As the top plate of the gas stove, there is a glass top plate (see, for example, Patent Document 1). The glass top plate looks good, can give a high-class feeling, and is also excellent in cleanability in the event of spillage.

In such a glass top plate, the appearance is further improved by adding a pattern to the surface thereof. In this case, conventionally, as shown in FIG. 6, for example, a means for forming an ink layer 9 representing a pattern on the surface of the glass plate 7 forming the main portion of the glass top plate has been adopted. The ink layer 9 is formed by, for example, applying glass ink to a glass plate 7 by a screen printing technique and then baking the ink layer 9 at a high temperature of about 650 ° C.

However, in the above-mentioned prior art, there is room for improvement as described below.

First, since the ink layer 9 is formed through a step of baking the printed ink at a high temperature, so-called ink loss or the like is likely to occur, and the yield is poor.
Second, the ink layer 9 is easily peeled off when it comes into contact with, for example, a trivet. In order to prevent this, it is necessary to form the clear layer 2e on the ink layer 9, but when the clear layer 2e is peeled off, the ink layer 9 is also peeled off.
Thirdly, a printing plate for the ink layer 9 is required, and the flexibility for changing the pattern or the like is lacking.
Fourth, a furnace for baking the ink layer 9 is required, and the working environment thereof is not very good.

Japanese Unexamined Patent Publication No. 2014-20646

The present invention has been conceived under the above-mentioned circumstances, and is capable of appropriately solving various problems based on expressing a pattern or the like by using an ink layer. The subject is to provide a top plate and a method for manufacturing the top plate.

In order to solve the above problems, the following technical measures are taken in the present invention.

The glass top plate for a stove provided by the first aspect of the present invention is a glass top plate for a stove provided with a glass plate, and the surfaces of the glass plates are separated from each other or partially separated from each other. A plurality of overlapping dot-shaped recesses are formed, and these plurality of recesses represent a pattern, a figure, a character, or a symbol, and a part of the plurality of recesses is formed on the surface of the glass plate. A clear layer that has penetrated and has a smooth surface is provided in a laminated manner, and the clear layer is characterized in that it is colored and transparent.

According to such a configuration, the following effects can be obtained.
That is, as a means for expressing a pattern or the like on the surface of the glass plate, a recess is used, and a means for providing an ink layer is not adopted. Therefore, it is possible to appropriately solve the problems in the prior art in which the pattern or the like is expressed by the ink layer. Specifically, first, the recess can be formed by laser processing as described later, and poor yield due to ink leakage or the like can be eliminated. Secondly, unlike the ink layer, the recess formed in the glass plate does not peel off and is excellent in durability. Thirdly, a printing plate is not required, and it is excellent in flexibility when changing a pattern or the like. Fourth, a furnace for baking the ink layer is not required, and the working environment can be improved.
Further, although the conventional ink layer expresses a pattern or the like by color, the recess in the present invention is not expressed by such a color, so that it is possible to give a design having a different taste from the conventional one. be.

Further, according to the above configuration, it is possible to reduce the total area (the amount of processing of the glass plate) by reducing the size of each of the plurality of recesses used for expressing a pattern or the like. Therefore, it is possible to facilitate the processing of a plurality of recesses, shorten the processing time, reduce the processing cost, and the like.

Further, according to the above configuration, the surface of the glass top plate for the stove can be made a smooth surface by the clear layer. Further, since a part of the clear layer has entered the recess, the bonding strength of the clear layer to the glass plate can be increased, and the clear layer can be made difficult to peel off from the glass plate.

In the present invention, preferably, the recess represents the manufacturing information of the stove on which the glass top plate for the stove is mounted.

The method for manufacturing a glass top plate for a stove provided by the second aspect of the present invention is a manufacturing method for manufacturing a glass top plate for a stove provided with a glass plate, and the glass plate is borosilicate. By irradiating the surface of the glass with a picosecond laser beam as a laser beam, the glass is separated from each other or partially overlapped with each other to form a dot shape, which is a pattern, a figure, a character, or a symbol. A recess forming step of forming a plurality of recesses expressing the above, and a clear layer forming step of laminating a clear layer having a part of the recesses and having a smooth surface on the surface of the glass plate. And, it is characterized by having.

According to such a configuration, a minute-sized recess, which is difficult to process by machining, can be efficiently and appropriately formed on the glass plate, and the glass top plate for a stove provided by the first aspect of the present invention can be obtained. It becomes possible to manufacture with high productivity.

Further, according to the above configuration, it is preferable to form recesses on the surface of the glass plate at high speed and in good appearance. A glass plate has low light absorption and a larger pulse width than a picosecond laser beam. For example, it is difficult to form a recess in a glass plate with a nanosecond laser beam, but according to a picosecond laser beam, such a recess is formed. It is possible to solve the problem. In addition, according to picosecond laser light, ablation processing that causes almost no thermal effect is possible instead of photothermal processing that is seen in general laser light, so minute burrs are not generated around the recesses. It is possible to form a concave portion of a size with high accuracy in a clean state without burrs. On the other hand, in the case of femtosecond laser light having a pulse width smaller than that of picosecond laser light, although it is excellent in precision workability, the processing speed is slow and productivity is lowered. On the other hand, according to the picosecond laser beam, there is no such problem.

Other features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.

(A) is a perspective view showing an example of a glass top plate for a stove according to the present invention, and (b) is a perspective view showing an example of a usage state of the glass top plate for a stove shown in (a). (A) is a plan view of a main part of the glass top plate for a stove shown in FIG. 1, and (b) is an enlarged cross-sectional view of a main part of IIb-IIb of (a). (A) is an enlarged plan view of a main part showing a plurality of recesses formed in the glass plate of the glass top plate for the stove shown in FIGS. 1 and 2, and (b) is the required IIIb-IIIb of (a). It is a part enlarged sectional view. It is explanatory drawing which shows an example of the schematic structure of the laser processing machine used for forming a recess in a glass plate. It is the main part plan view which shows the other example of this invention, and is the partially enlarged view. It is sectional drawing of the main part which shows an example of the prior art.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

The glass top plate A for the stove shown in FIG. 1 is mounted on the stove main body 5 as a main part of the gas stove B, and a plurality of stove openings 18 for exposing the stove burner 50 are formed. It is configured to include a glass plate 1 having a substantially rectangular shape in a plan view. The glass plate 1 is, for example, borosilicate glass.

As shown in FIG. 2, a plurality of recesses 10 are formed on the surface of the glass plate 1, and the clear layer 2 is laminated and formed. The plurality of recesses 10 represent a plurality of circular patterns F1 forming a polka dot pattern appearing on substantially the entire surface of the glass plate 1. In addition, the letter F2 indicating the lot number and other manufacturing information of the gas stove B is also expressed.

More specifically, as shown in FIG. 3, a plurality of fine recesses 10 having a diameter of about 1 to 50 μm and a depth of about 1 to 50 μm are formed on the surface of the glass plate 1 by laser processing described later. There is. These plurality of recesses 10 are formed so as to be separated from each other by being provided at an appropriate arrangement pitch (for example, about 2 to 100 μm) or to overlap each other as described later with reference to FIG. The arrangement is such that the entire pattern is a circular pattern F1 in a plan view. Similar to the circular pattern F1, the letters F2 are also arranged so that a plurality of recesses 10 that are separated from each other or overlap each other are gathered so that the entire letter F2 has a predetermined letter shape in a plan view.

The clear layer 2 is formed by applying, for example, a hydrophilic paint, and is colorless and transparent or colored transparent. The lower surface side of the clear layer 2 has entered the plurality of recesses 10.

As a means for forming the plurality of recesses 10 in the glass plate 1, for example, a laser processing machine C as shown in FIG. 4 is used.
This laser processing machine C is a picosecond laser processing machine, and includes a picosecond pulse laser oscillator 60, an amplifier 61, a mirror 62, a condenser lens 63, and the like. The configuration of each of these parts is conventionally known and will be omitted, but the picosecond laser beam is, for example, a picosecond laser beam in an ultraviolet region having a wavelength of about 355 nm. The glass plate 1 as a work is placed on the moving table 64. When a plurality of recesses 10 are formed in the glass plate 1, the picosecond laser beam is sequentially applied to a predetermined portion on the surface of the glass plate 1 while moving the glass plate 1 in the x and y directions using the moving table 64. I will irradiate.
When forming one recess 10, one recess 10 may be formed by one laser beam irradiation, but instead, one recess 10 is formed by repeating laser beam irradiation a plurality of times. The means for forming the laser may be adopted. According to the latter means, it is possible to reduce the heat effect due to laser processing.

According to the picosecond laser processing described above, although the glass plate 1 is made of a material having low light absorption, it is possible to induce so-called non-linear absorption of laser light and appropriately form the recess 10. Further, according to the picosecond laser machining, since the ablation machining that hardly causes the influence of heat is possible, the recess 10 can be formed with high accuracy without generating burrs due to the glass melt around the recess 10. It is possible to form. In the case of femtosecond laser machining, which has a smaller pulse width than picosecond laser light, although it is excellent in precision workability, the machining speed is slow and productivity drops, whereas according to picosecond laser machining, it is such. There are no problems.
The glass top plate A for a stove of the present embodiment is manufactured by forming a plurality of recesses 10 in the glass plate 1 by the laser beam processing described above and then forming the clear layer 2 described above.

Next, the operation of the above-mentioned glass top plate A for the stove will be described.

First, since the circular pattern F1 and the character F2 are represented by the recess 10 formed in the glass plate 1, the circular pattern F1 and the character F2 are peeled off, unlike the case where the pattern is expressed by using ink or the like. There is no such thing, and blurring is properly prevented. Therefore, it is possible to maintain the appearance of the glass top plate A for the stove in a beautiful state for a long period of time. Further, since the circular pattern F1 and the character F2 are not represented by the paint but are represented by the recesses 10, it is possible to give the design a taste that cannot be obtained by the paint.

Since the circular pattern F1 and the letter F2 are represented by aggregating a plurality of recesses 10, the processing of the glass plate 1 is compared with the case where each of the circular pattern F1 and the letter F2 is represented by only one recess, for example. The amount can be reduced. Therefore, productivity can be increased. The clear layer 2 has the effect of smoothing the surface of the glass top plate A for the stove and improving the cleanability, and by covering the recess 10, moisture, fine dust, etc. enter the recess 10. It also prevents that. Since the lower surface side portion of the clear layer 2 has entered the recess 10, it is possible to make it difficult for the clear layer 2 to be peeled off from the glass plate 1. Further, when the clear layer 2 is colored and transparent, the clear layer 2 enters the recess 10 to cause a difference in color between the recess 10 and other portions. Therefore, it is possible to make a more quaint design by taking advantage of such a thing.

FIG. 5 shows another embodiment of the present invention.
In the figure, the plurality of dot-shaped recesses 10 are formed by being connected so as to partially overlap each other. In the figure, the arrangement pitch P1 is, for example, about 2.5 μm, and the arrangement pitch P2 is, for example, about 30 to 50 μm. In the figure, the concave portion 10 is not formed in the circumferential portion of the circular pattern F1, but it goes without saying that the concave portion 10 may be formed in the circumferential portion.
According to the present embodiment, although the total number of the plurality of recesses 10 is larger than that of the embodiment, it is possible to make the pattern expressed by using the plurality of recesses 10 clearer or clearer. Is.

The present invention is not limited to the contents of the above-described embodiments. The specific configuration of each part of the glass top plate for the stove according to the present invention can be variously redesigned within the range intended by the present invention. Further, the specific configuration of each step of the method for manufacturing the glass top plate for a stove according to the present invention can be variously changed within the range intended by the present invention.

Recess 10 formed in glass plate 1 need not be formed deeply, the depth may be shallower, more Ru can also be a smooth surface of the inner surface of the recess 10.

In the present invention, various patterns, figures, characters, or symbols can be expressed by the recesses 10 of the glass plate 1, and the specific forms thereof are not limited. The glass plate 1 may be colorless or colored, and the specific material thereof is not limited.
The glass top plate for a stove referred to in the present invention can be applied to, for example, an IH stove other than the gas stove.

A Glass top plate for stove F1 Circular pattern F2 Character 1 Glass plate 10 Recess 2 Clear layer

Claims (3)

It is a glass top plate for a stove equipped with a glass plate.
On the surface of the glass plate, a plurality of dot-shaped recesses that are separated from each other or partially overlap each other are formed, and these plurality of recesses represent a pattern, a figure, a character, or a symbol .
On the surface of the glass plate, a clear layer is provided in which a part of the glass plate has penetrated into the plurality of recesses and the surface is a smooth surface.
The clear layer is a glass top plate for a stove, which is characterized by being colored and transparent. The glass top plate for a stove according to claim 1.
The recess is a glass top plate for a stove that expresses manufacturing information of a stove on which the glass top plate for the stove is mounted. It is a manufacturing method for manufacturing a glass top plate for a stove equipped with a glass plate.
The glass plate is borosilicate glass, and the surface of the glass is irradiated with a picosecond laser beam as a laser beam to form dots that are separated from each other or partially overlapped with each other. A recess forming step that forms a plurality of recesses representing a figure, letter, or symbol,
A clear layer forming step in which a clear layer having a smooth surface and a part of the recesses entering the plurality of recesses is laminated on the surface of the glass plate.
A method for manufacturing a glass top plate for a stove, which comprises the above.

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