JP4431456B2 - Manufacturing method of colored glassware - Google Patents

Description

  The present invention relates to a method for manufacturing a colored glassware having a mottled pattern by a color frit.

  It has long been practiced in the technical field of artificial molding methods to produce colored glassware with mottled patterns by attaching color frit grains to a hot glass surface and melting them. However, since the artificial molding method is a craft method that depends on the skill of glass craftsmen, it is inevitable that mass production is impossible and the manufacturing cost is high. On the other hand, in the technical field of automatic glass forming that places importance on productivity, coloring with a color frit is hardly performed.

  Slightly in Patent Documents 1 to 3, a colored glass piece (corresponding to a color frit) is attached to the surface of the first gob placed in the mold, and a second gob is further introduced into the colored glass. A method is disclosed in which a piece is press molded in a state of being enclosed in glass. According to this method, it is possible to manufacture a colored glassware having a mottled pattern in which the color frit sandwiched inside the glass is easily compatible with the gob and there is no fear of cracking.

However, since this method uses a double gob, the molding speed is slow, and it can only be applied to a thick glass vessel that can be press-molded, and it has not been possible to mold high-quality thin glass.
JP 58-9831 A JP 2002-179428 A JP-A-2002-220236

  The present invention solves the above-mentioned problems of the prior art, and is colored so that a colored glassware having a mottled and high-class feeling and a mottled pattern due to a color frit can be produced with high productivity by an automatic glass molding machine. It is made in order to provide the manufacturing method of a glass container.

  A first invention made in order to solve the above-mentioned problem is a bowl in which color frit grains are adhered to the lower part of a bowl being molded by a blow machine, the bowl is transferred to a press machine, and the color frit grains are adhered. A gob is placed in an inverted state on the lower part of the sheet, and press molding is performed. In the second invention, the bowl formed by the blow machine is reversed, and the color frit grains are sprayed and adhered to the lower part of the bowl. The bowl is transferred to the press machine and is attached to the lower part of the bowl to which the color frit grains are adhered. It is characterized by being covered with a gob in an inverted state and then press-molded.

  In addition, as a specific means for attaching the color frit grains to the lower part of the bowl being molded by the blow machine in the first invention, a method of spraying and attaching the color frit grains to the bowl supported by the mouth mold, Alternatively, a method in which the color frit particles are attached to the lower portion of the bowl by bringing the plate on which the color frit particles are placed into contact with the lower portion of the bowl supported by the orifice plate can be employed.

  According to the present invention, the legs are press-molded with the color frit grains sandwiched between the lower portions of the thin bowl formed by the blow machine. For this reason, the color frit grains are melted in a state of being enclosed in the glass and are well compatible with the glass, so that there is no fear of cracking, and it is possible to produce a thin and high-quality glassware. In addition, since the color frit particles are adhered during molding by the blow machine or before the molded bowl is transferred to the press machine, it is not necessary to reduce the molding speed of the conventional molding machine, and high-speed molding by an automatic glass molding machine is possible. It becomes possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the present invention, a glass device with legs is formed by a combination of a blow machine and a press machine. Blow machines (blowing machines) are well known in the industry, and lightly press the gob to create a disk-shaped disc gob, place it on the orifice plate and hang it from the orifice, forming a thin bowl in the air, It is a molding machine that wraps it in a finishing mold as needed and blow-molds it into the final shape.

  In the first embodiment of the present invention, as shown in FIG. 1, the color frit grains C are attached to the lower part of the bowl 2 depending from the orifice plate 1. The bowl 2 is supported on the orifice plate 1 by a portion called a moy 8 at the upper end thereof, and rotates around the central axis 3 together with the orifice plate 1. For this reason, if the color frit particle | grains C are sprayed from the nozzle 4 installed in the side, the color frit particle | grains C can be made to adhere over the lower periphery of the bowl 2. FIG.

  The nozzle 4 is connected to a frit tank 6 by a pipe 5, and the color frit particles C supplied from the frit tank 6 are ejected by opening and closing a valve 7 and blowing compressed air into the pipe 5. In addition, in order to prevent the temperature drop of the bowl 2 by compressed air, it is preferable to perform auxiliary heating with a burner frame.

  The color frit grains C filled in the frit tank 6 are low-melting glass particles containing a large amount of coloring components. The color frit is usually used to put a colorless glass fabric into a colored glass by putting it in a glass feeder. In the present invention, the particle size is set to 0.5 mm to 5 mm in order to melt on the surface of the bowl 2. To do. If the particle size is larger than this, it will be difficult to melt on the surface of the bowl 2 and cause cracks and the like. Conversely, if the particle diameter is smaller than this, the coloring effect by the color frit grains C is impaired.

  The color frit grains C used in the present invention are preferably those whose composition has been adjusted so that the difference in thermal expansion coefficient from the glass of the bowl 2 is within ± 10%. This is because if the difference in thermal expansion coefficient is large, cracks may occur in the cooling process.

  In this way, the bowl 2 with the color frit grains C adhered to the lower part is separated from the orifice plate 1 together with the moy 8 and is in the state shown in FIG. The bowl 2 is turned upside down and turned upside down as shown in FIG. 3, and transferred to the press machine. This process itself is well known in the industry and is the same as before except that the color frit grains C are adhered.

  In the press machine, the bowl 2 to which the color frit grains C are adhered is supported by the support base 9, and the mold 10 is placed on the top. At this time, the portion of the bowl 2 where the color frit grains C are adhered is exposed in the leg forming space 11 formed in the upper part of the mold 10. And the gob 12 is thrown in from the upper direction, the leg part 13 is shape | molded by press molding by a conventional method. Needless to say, the shape of the leg 13 can be freely set. The foil 8 is then cut.

  As a result, as shown in FIG. 5, a glass device with legs in which the legs 13 are integrated with the thin-walled bowl 2 is formed. 12 is charged, the color frit grains C are completely melted while being sandwiched inside the glass, and a colored glassware having a mottled pattern can be manufactured. Since the color frit grains C are thus sandwiched inside the glass, they are familiar and there is no risk of cracking. Moreover, since the mottled pattern is visible through the leg part 13, it can be enlarged or reduced by the lens effect depending on the shape of the leg part 13, and the design effect can be enhanced.

  In the first embodiment described above, the color frit grains C are sprayed and adhered to the bowl 2 supported by the orifice plate 1. However, in the second embodiment, the color frit grains C are adhered to the lower part of the bowl 2 using the plate 14 as shown in FIG. That is, in this embodiment, the color frit grains C are supplied onto the plate 14 from the nozzle 4 and the plate 14 is brought into contact with the lower part of the bowl 2 supported by the orifice plate 1 as indicated by the arrow, whereby the bowl 2 Color frit grains C are adhered to the lower part of the plate. The bowl 2 is transferred to the press machine in the same manner as in the first embodiment, and a colored glassware having a mottled pattern is produced in the same manner.

  In the first invention described above, the color frit grains C are adhered to the lower part of the bowl 2 being molded by a blow machine. However, in the second aspect of the present invention, a normal bowl is formed by a blow machine and turned upside down, and the color frit grains C are sprayed and adhered to the lower portion thereof from the nozzle 4 as shown in FIG. Then, the bowl 2 is transferred to a press machine, and the gob 12 is put on the lower part of the bowl 2 to which the color frit grains C are adhered as shown in FIG. Also by this method, a colored glassware having a mottled pattern can be produced. However, in the case of this method, it is desirable to sufficiently heat the lower part of the bowl 2 with a burner frame to melt the color frit grains C.

  As described above, according to each invention of the present application, it is possible to manufacture a colored glassware having a mottled pattern in which the color frit grains C are enclosed between the lower part and the leg part of the thin bowl 2 formed by the blow machine. For this reason, the color frit grains C are well compatible with glass and do not have to worry about cracking. Further, since the color frit grains C are adhered during the molding by the blow machine or before the molded bowl 2 is transferred to the press machine, it is not necessary to reduce the molding speed of the conventional molding machine, and the high speed by the automatic glass molding machine. Molding becomes possible.

It is a fragmentary sectional view showing a 1st embodiment of the 1st invention. It is a front view of a bowl. It is a front view which shows the inverted bowl. It is sectional drawing which shows the gob injection | throwing-in process in a press machine. It is a front view which shows the shape | molded colored glassware. It is a fragmentary sectional view showing a 2nd embodiment of the 1st invention. It is a front view which shows embodiment of 2nd invention.

Explanation of symbols

C Color frit grain 1 Orifice plate 2 Bowl 3 Central shaft 4 Nozzle 5 Pipe 6 Frit tank 7 Valve 8 Moil 9 Support base 10 Mold 11 Leg forming space 12 Gob 13 Leg 14 Plate

Claims (4)

  Color frit grains are attached to the lower part of the bowl being molded by a blow machine, this bowl is transferred to the press machine, and the gob is placed on the lower part of the bowl to which the color frit grains are attached in an inverted state, followed by press molding. The manufacturing method of the colored glassware characterized by these.   2. The method for producing a colored glassware according to claim 1, wherein the color frit particles are sprayed and adhered to the bowl supported by the orifice plate.   2. The colored glassware according to claim 1, wherein the color frit grains are attached to the lower part of the bowl by bringing the plate on which the color frit grains are placed into contact with the lower part of the bowl supported by the orifice plate. Production method.   The bowl formed by the blow machine was inverted, and the color frit grains were sprayed and attached to the lower part of the bowl. Furthermore, the manufacturing method of the colored glass device characterized by carrying out press molding.

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