JP3600162B2 - Colored glass product and method for producing the same - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing a glass product having a color pattern by an automatic press molding device by adding a coloring material such as a glass frit of another color different from the color of the dough glass between two gobs. It is.
[0002]
[Prior art]
2. Description of the Related Art In a glass product formed by hand, a method of forming a pattern in a glass with an arbitrary distribution or shape using colored glass is generally performed. Specifically, a colored glass is sprinkled or placed on the rolled dough glass, and a new dough glass is additionally formed on the rolled dough glass. Since all of these methods are performed manually, productivity is poor and glassware is very expensive.
[0003]
As a method of manufacturing a glass product with a color pattern with an automatic molding apparatus, a method of sandwiching a coloring material such as a colored glass frit into a double gob has been devised. That is, as shown in FIG. 3, a method of spraying the coloring material C on the first gob G1 put into the mold 3 and overlaying the second gob G2 thereon, followed by press molding. Such a method is disclosed in, for example, JP-A-58-9831 and JP-A-9-40429.
[0004]
Japanese Patent Application Laid-Open No. 9-40429 discloses a method in which the colorant is supplied from a place slightly away from the gob. However, according to this supply method, not only the distribution of the coloring material, that is, the distribution of the color pattern in the final product varies widely, but also the air is entrained by the overlapping of the coloring materials, resulting in a defect of bubbles. Cheap. Therefore, there is a disadvantage that a high-quality product having commercial value cannot be stably manufactured.
[0005]
Japanese Patent Application Laid-Open No. 58-9831 employs a vacuum head in order to improve the distribution of the coloring material. However, when the shape of the coloring material is a conventional three-dimensional shape having corners, a gap is formed between the suction hole and the coloring material C as shown in FIG. 11 and the coloring material C is not adsorbed, or as shown in FIG. A plurality of coloring materials C may be adsorbed to one suction hole 9. In particular, in the latter case, since the suction force for the coloring material is weak, the probability that the coloring material falls from the vacuum head before reaching the gob due to the vibration of the molding machine or the vibration of the supply device itself is extremely high. As a result, the distribution of the color patterns varies widely, and there is no reproducibility. Further, as shown in FIG. 13, the shape of the above-mentioned coloring material has a problem that air easily enters between the coloring material and the gob and entrainment bubbles are easily generated around the color pattern.
[0006]
Further, since the vacuum head 7 used in the conventional method has a single suction path as shown in FIG. 14, when a plurality of colorants are used, the desired suction hole of a desired color is used. The coloring material could not be adsorbed, and reproducibility of a plurality of color patterns could not be expected at all.
[0007]
[Problems to be solved by the invention]
The present invention provides a means for giving a high degree of reproducibility to the distribution of color patterns when manufacturing a glass product containing a color pattern by sandwiching a coloring material between two gobs with an automatic press device. is there.
[0008]
Further, the present invention provides a glass product excellent in aesthetic appearance and strength by eliminating bubbles remaining due to air entrainment entering the periphery of the color pattern.
[0009]
[Means for Solving the Problems]
The present invention provides a method for producing a glass product with a color pattern, in which a colorant is sprayed on a first gob charged in a mold, and a second gob is superimposed on the colorant, followed by press molding. Has a plurality of suction holes of a vacuum head having a plurality of suction holes, and the paths are appropriately opened and closed for each color of the coloring material to be adsorbed, so that a desired suction hole of the vacuum head is formed. A method for producing a glass product with a color pattern, characterized by adsorbing a coloring material of the color, releasing suction on the first gob and spraying the coloring material, and a glass product produced by this method. is there.
[0010]
In the present invention, since the coloring material C is substantially spherical, one coloring material C is surely adsorbed to one suction hole 9 as shown in FIG. That is, since the coloring material is surely absorbed one by one into all the suction holes 9 of the vacuum head 7, the pattern of the coloring material sprayed on the first gob is always the same, and has the same color pattern. Glass products can be manufactured in large quantities.
[0011]
By providing a plurality of paths for the suction holes of the vacuum head and appropriately opening and closing these paths for each color of the colorant to be adsorbed, the colorant of a desired color can be adsorbed to a desired suction hole. Therefore, high reproducibility can be realized even when a plurality of colors are used.
[0012]
In the present invention, the shape of the coloring material is not limited to a spherical shape but may be a slightly distorted shape such as a rugby ball shape. It is difficult to obtain a coloring material having a perfect spherical shape. Even if the shape is slightly distorted but has no corners, one coloring material is surely adsorbed to one suction hole as shown in FIG. Because.
[0013]
The colorant can be easily formed into a substantially spherical shape without corners by a well-known method such as a carbon method or a fluidized firing method by crushing, granulating, or the like. Alternatively, the coloring material having corners is directly heated by a burner, and the surface thereof is melted to form corners. The coloring material is glass frit, colored glass, or the like.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 is a schematic diagram of a press forming apparatus for glass products, FIG. 2 is a cross-sectional view of a mold 3 and a first gob G1, FIG. 3 is a cross-sectional view of the mold 3 and a first gob G1 and a second gob G2, and FIG. 5 is a bottom view of the vacuum head 7, FIG. 5 is a sectional view taken along the line XX in FIG. 4, FIG. 6 is a bottom view of the vacuum head 7 in a state in which the coloring material C1 is adsorbed, and FIG. FIG. 8 is a plan view of the gob G1, FIG. 8 is a plan view of the glass product 12, FIG. 9 is an explanatory diagram of a state of adsorption of the coloring material C, and FIG. 10 is an explanatory diagram of the coloring material C spread on the first gob G1.
[0015]
FIG. 1 is a schematic view of a press forming apparatus for carrying out the method for producing a glass product (dish) having a color pattern according to the present invention. In the figure, a plurality of mold holders 2 are arranged concentrically on a rotary table 1, and a mold 3 is mounted on each mold holder. The turntable intermittently rotates clockwise (in the direction of the arrow). At the position A, the first gob G1 is supplied from the delivery 5 into the mold 3. When the mold 3 comes to the position B, as shown in FIG. 2, a coloring material (glass frit) composed of substantially spherical particles is supplied from the vacuum head 7 onto the first gob G1. When the mold 3 comes to the position C, the second gob G2 is supplied from the delivery 5 into the mold 3. The mold 3 further rotates to the position D. At this time, the state of the gob in the mold 3 is as shown in FIG. At the position D, the plunger head 8 is lowered, and the glass product is formed.
[0016]
As shown in FIG. 5, the vacuum head 7 is divided into two suction paths, an A path 10 and a B path 11, and the A path communicates with the suction hole 9a and the B path communicates with the suction hole 9b. . For example, when only the path A is opened with the path B closed and the green colorant C1 is adsorbed by the container, as shown in FIG. 6, only the suction holes 9a communicating with the path A have a green color. The coloring material C1 is adsorbed. Thereafter, when the path B is further opened in the container containing the blue colorant C2 to be adsorbed, the green colorant C2 is adsorbed to the suction holes 9b. Then, when the vacuum head 7 is moved onto the first gob G1 and the colorant is sprayed, the green colorant C1 and the blue colorant C2 are sprayed in a predetermined pattern as shown in FIG. When the second gob is overlaid thereon and press-molded, as shown in FIG. 8, a glass product 12 (dish) having a polka dot pattern of a green coloring material C1 and a blue coloring material C2 at predetermined positions is formed. . As described above, when a plurality of suction holes of the vacuum head are provided, a glass product in which a plurality of colors are arranged at predetermined positions can be manufactured with high reproducibility.
[0017]
【The invention's effect】
The present invention was not able to be solved by the conventional manufacturing method, in the automatic press-molded product with a color pattern by the double gob sandwich method, the position of the color pattern can be reproduced, and a product without air entrainment bubbles, that is, a product of commercial value High-end products can be mass-produced easily and inexpensively.
[Brief description of the drawings]
FIG. 1 is a schematic view of a press forming apparatus for glass products.
FIG. 2 is a sectional view of a mold 3 and a first gob G1.
FIG. 3 is a sectional view of a mold 3 and first and second gobs G1 and G2.
FIG. 4 is a bottom view of the vacuum head 7;
FIG. 5 is a sectional view taken along line XX in FIG.
FIG. 6 is a bottom view of the vacuum head 7 in a state where the coloring material C1 is adsorbed.
FIG. 7 is a plan view of a first gob G1 on which coloring materials C1 and C2 are sprayed.
8 is a plan view of the glass product 12. FIG.
FIG. 9 is an explanatory diagram of a state of adsorption of a coloring material C.
FIG. 10 is an explanatory diagram of a coloring material C sprayed on a first gob G1.
FIG. 11 is an explanatory diagram of a state of adsorption of a coloring material C;
FIG. 12 is an explanatory diagram of a state of adsorption of a coloring material C;
FIG. 13 is an explanatory diagram of the coloring material C sprayed on the first gob G1.
14 is a sectional view of the vacuum head 7. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotary table 2 Mold holder 3 Mold 5 Delivery 6 Delivery 7 Vacuum head 8 Plunger head 9 Suction hole 10 A path 11 B path 12 Glassware C Colorant G1 First gob G2 Second gob

Claims (3)

A method for producing a glass product with a color pattern, in which a coloring material is sprayed on the first gob put into the mold, and the second gob is overlaid thereon and then press-molded, the coloring material has a substantially spherical shape. The vacuum head having a plurality of suction holes has a plurality of suction hole paths, and the paths are appropriately opened and closed for each color of the coloring material to be adsorbed, so that the desired suction holes of the vacuum head are colored in a desired color. A method for producing a glass product with a color pattern , comprising: adsorbing a material, releasing suction on the first gob, and spraying the coloring material. 2. The method according to claim 1 , wherein the coloring material is a frit. A glass product produced by the method according to claim 1 or 2.

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