JP3658230B2 - Method and apparatus for manufacturing colored glass products - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a colored glass product for producing a colored glass product obtained by covering an inner glass with an outer glass as a colored glass, and more particularly to a method and an apparatus for producing a colored glass product of crystal glass.
[0002]
[Prior art]
As a method for producing a colored glass product, conventionally, for example, the method described in JP-A-3-159998, the method described in JP-A-1-234338, or JP-A-9-110448 (the same publication). The method described in FIG. 3 and the like) is known. In the methods described in these publications, a thin-walled outer glass layer made of colored glass is formed by a blow molding method (blow molding method), and the inner-layer glass of colored glass or transparent glass different from the outer-layer glass is formed in the outer-layer glass. The material (gob) is put in and the glass is covered with glass by forming a thick inner glass by extending the gob to the inner surface of the outer glass by centrifugal force, pressing, or blow molding. . Further, in the above method, there is also known a method in which the outer layer glass is formed by press molding instead of blow molding.
[0003]
[Problems to be solved by the invention]
Among the conventional methods described above, the method of forming the outer layer glass by press molding is easy to produce a layered and reproducible thickness, but it is difficult to make it thin. For this reason, the thickness of the outer glass layer of the product is inevitably increased, and there is a problem in that the balance between the transparent portion after cutting the glass surface and the colored glass portion is poor. Furthermore, there is a problem that the familiarity of the welded portion between the colored glass and the transparent glass is poor, and the boundary portion appears and the aesthetic appearance is impaired. This boundary portion appears remarkably after undergoing an acid polishing process for smoothing the cut surface after cutting.
[0004]
In addition, the method of forming the outer layer glass by blow molding has the advantage that the coated outer layer glass can be thinned and is compatible with the transparent glass, but when the colored glass (outer layer glass) is blown into the mold However, there is a problem that it is not easy to stably produce a product having a desired thickness and uniformity of thickness at the time of becoming a product, which requires craftsmanship skills. Moreover, after the colored glass is blown into the mold, it is torn into pieces or cut with a burner to cut off the base, but because the thickness of the cut portion is not stable, stable cutting cannot be performed, and the glass is put into the mold. There was also a problem that the yield was poor because pieces were spilled or melted pieces from the burner sag inside.
[0005]
Furthermore, for example, in the case of color covering molding using gold red (colored in red using gold), a gold red original heating coloring process is required, and the temperature range for color development is set for a certain period of time. It is necessary to elapse. If the way of the temperature range is different, the way of coloring changes. Therefore, in order to make the quality constant, it is necessary to keep the temperature range constant. However, since all of the above conventional methods are manual manufacturing methods, it is difficult to stably repeat the temperature range with good reproducibility, and it is difficult to obtain gold-red having a constant quality. Furthermore, since the conventional method is a manual method, it requires a large number of personnel, making mass production difficult and costly.
[0006]
The present invention has been made under the background described above, and can stably produce a colored glass product having an outer layer glass having a desired thickness and having a uniform quality, and is relatively easy. It is another object of the present invention to provide a method and an apparatus for manufacturing a covered glass product that can automate its manufacture.
[0007]
In order to solve the above-mentioned problem, the first invention
In the method for producing a colored glass product for producing a colored glass product obtained by covering the inner glass with the outer glass as a colored glass,
An outer layer glass intermediate molded product production step of forming a predetermined amount of the outer layer glass material supplied from the glass material supply means to form an intermediate molded product of the outer layer glass;
By supplying and molding the material for the inner layer glass in the intermediate molded product of the outer glass layer, and having a colored glass molded product preparation step for obtaining a colored glass molded product,
The outer layer glass intermediate molded article production process includes a preliminary press process in which the outer glass layer material is pre-pressed to form a parison, and a parison formed in the preliminary press process is blown to form an outer glass intermediate mold. A blow molding process for producing a product,
The colored glass molded product preparation step is formed by a preliminary pressing step in which the inner layer glass material supplied in the outer glass intermediate molded product is pre-pressed to form a colored parison, and this preliminary pressing step. And a blow molding process for forming a colored glass molded product by blow molding the colored parison.
[0008]
The second invention is related to the first invention.In the method for producing a colored glass product,
  In the outer layer glass intermediate molded article manufacturing step, the amount of the outer layer glass material supplied from the glass material supply unit is measured, and the amount of the outer layer glass material supplied from the glass material supply unit based on the measurement result It is a manufacturing method of a color-covered glass product characterized by controlling.
[0009]
The third invention relates to the first or second invention.In the method for producing a colored glass product,
  In the middle of the preliminary pressing step and the blow molding step in the outer layer glass intermediate molded article production step, the parison obtained in the preliminary pressing step is subjected to heat treatment and / or preliminary blowing treatment, and the length of the parison after these treatments. This is a method for producing a colored glass product, characterized in that the time for the heat treatment and / or the preliminary blowing treatment is controlled so that the length is measured and the length becomes a predetermined length.
[0010]
The fourth invention is:Color covering for producing colored glass products by covering inner layer glass with outer layer glass as colored glass
In glass product manufacturing equipment,
  An outer glass material supply device for supplying a predetermined outer glass material; and a pre-press molding device for pre-pressing a predetermined amount of the outer glass material supplied by the outer glass material supply device to form a parison. ,
  A blow molding device for blow molding the parison formed by the preliminary press molding device to obtain an intermediate molded product of the outer glass layer,
  An inner layer glass material supply device for supplying an inner layer glass material to an intermediate molded product of the outer layer glass obtained by the blow molding device;
  A pre-press molding device that pre-presses the inner layer glass material in the outer layer glass intermediate molded product to form a colored parison;
  An apparatus for producing a colored glass product, comprising: a blow molding apparatus that blows and molds a colored parison formed by the preliminary press molding apparatus to form a colored glass molded product.
[0011]
According to the above-described invention,
A. Forming a predetermined amount of the outer layer glass material supplied from the glass material supply means to form an intermediate molded product of the outer layer glass,
B. Both the outer layer glass intermediate molded product production process and the colored glass molded product production process were configured to perform a blow molding process after the preliminary pressing process,
Allows the amount of glass material used to form the outer glass intermediate molding to be accurately adjusted with good reproducibility, and the thickness is reproduced to the desired and uniform thickness before blow molding. By pre-molding by press molding that can be adjusted accurately and accurately, the thickness of the outer layer glass after blow molding can be easily formed to a uniform and desired thickness with good reproducibility.
[0012]
That is, by performing the pre-press molding, it became possible to make the parison wall thickness, the uniformity of the wall thickness, and the reproducibility thereof accurately constant before the blow molding. As a result, in the blow molding, as long as the basic factors such as the blow pressure are kept constant, it is possible to easily obtain the uniformity and reproducibility of the wall thickness while ensuring the desired thin wall. As a result, it has become possible for general workers to manufacture products that can only be made by skilled workers with the help of simple devices. What is even more groundbreaking is that it has made it possible for the first time to automate manufacturing, which was previously impossible, and to manufacture high-quality colored glass products stably in large quantities at low cost. It is.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a flowchart of all steps of a method for manufacturing a colored glass product according to an embodiment of the present invention, and FIGS. 2 and 3 are characteristic parts of the method for manufacturing a colored glass product according to an embodiment of the present invention. FIG. 4 is a detailed process explanatory diagram, FIG. 4 is a plan view showing a schematic configuration of an apparatus for carrying out a method for manufacturing a colored glass product according to an embodiment of the present invention, and FIGS. 5 to 7 are diagrams of each part of the apparatus shown in FIG. It is sectional drawing which shows a structure. Hereinafter, a method and apparatus for producing a colored glass product according to an embodiment of the present invention will be described with reference to these drawings.
[0014]
As shown in FIG. 1, the method for producing a colored glass product according to this embodiment includes (1) an outer layer glass supplying step, (2) a preliminary pressing step for the outer layer glass, and (3) heating the outer layer glass. A preliminary blowing step, (4) an outer layer glass blow molding step, (5) a foil cutting step, (6) an inner layer glass supplying step, (7) a colored glass preliminary pressing step, and (8) a colored covering. Glass heating / preliminary blowing step, (9) Colored glass blow molding step, (10) Molded product removal step, (11) Slow cooling step, (12) Moist cutting step of colored glass molded product And (13) a cutting / decorating process, (14) an acid polishing process, and (15) an inspection / packaging process.
[0015]
Moreover, as shown in FIG. 4, the colored glass product manufacturing apparatus according to this embodiment has the following main components:
An outer layer glass material supply device 1 for supplying a predetermined outer layer glass material;
A pre-press forming device 2 for pre-pressing a predetermined amount of the outer glass material supplied by the outer glass material supplying device 1 to form a parison;
A blow molding device 3 for blow molding the parison formed by the preliminary press molding device 2 to obtain an intermediate molded product of the outer glass layer;
An inner glass material supply device 4 for supplying an inner glass material to an intermediate molded product of the outer glass obtained by the blow molding device 3;
A pre-press molding device 5 for pre-pressing the inner layer glass material in the outer layer glass intermediate molded product to form a parison with color covering;
A blow molding device 6 for blow-molding the color-covered parison formed by the preliminary press-molding device 5 to form a colored glass-molded product;
Furthermore, although not shown in the drawing, there are devices including a computer that drives and controls these devices, devices that operate in cooperation with each other, and the like.
[0016]
Hereinafter, each process will be described in detail, and an apparatus according to the embodiment will be described together.
(1) Outer glass supply process
In this step, the outer layer glass material is passed through a platinum flow tube 1a provided in the outer layer glass material supply device 1 in a preliminary press mold 11 (see FIG. 5 (1)) for preforming the outer layer glass. 10 is a step of supplying 10. The outer layer glass material 10 is made by melting a glass raw material prepared at a predetermined composition ratio and is fluidized. When the outer layer glass is blue, for example, the outer layer glass material is obtained by adding cobalt oxide to the crystal glass composition, and when the outer layer glass is red, the outer layer glass material is the crystal glass composition. Add chloroauric acid (gold red).
[0017]
The preliminary pressing die 11 is housed and held in a die holder 11 a and is usually held in the holding hole 12 a of the die carrier 12. When the outer layer glass material 10 is supplied, the mold carrier 12 is driven so that the preliminary press mold 11 is positioned directly below the flow tube 1a. At that time, the elevating device installed below at that position is actuated to place the mold holder 11a on the mold placing table 13a of the elevating device 13 to raise it, and close to the flow tube 1a, the outer glass material 10 It is designed to make it easier to receive.
[0018]
A current flows through the flow tube 1a, and the temperature is controlled by adjusting the amount of the current, thereby adjusting the amount of the glass flowing out. Furthermore, a shear 1b for cutting glass flowing out from the flow tube 1a is provided below the flow tube 1a. With this shear 1b, when a predetermined amount of glass flows out of the flow tube 1a, the glass is cut (shear cut). As a result, the glass supply amount can be accurately controlled.
[0019]
When a predetermined amount of glass is supplied to the preliminary pressing mold 11, the lifting device 13 is operated to lower the mold mounting table 13 a and the preliminary pressing mold 11 is held in the holding hole 12 a of the mold carrier 12. Then, the mold carrier 12 rotates and moves the preliminary press mold 11 to the position of the preliminary press device 2.
[0020]
A neck ring carrier 22 is provided at the position of the preliminary press device 2 so as to be positioned above the mold carrier 12. The neck ring 21 is held in the neck ring holding hole 22 a of the neck ring carrier 22. Has been. The neck ring 21 includes a plunger ring 2b and a claw portion 2c. The neck ring 21 holds a function as a jig for performing preliminary pressing by receiving the plunger 2a constituting the press head of the preliminary pressing device 2 and the preliminary pressing mold 11 and a parison 10a obtained by the preliminary pressing. Have the function of transporting.
[0021]
(2) Pre-pressing process for outer glass layer
When the preliminary pressing die 11 is moved to the position of the preliminary pressing device 2 by the die carrier 12, the lifting device 23 installed below the position is operated to push up the preliminary pressing die 11, and the lower surface of the neck ring 21 Is brought into contact with the upper surface of the preliminary pressing die 11. In this state, the plunger 2a descends and presses to form an outer layer glass parison 10a.
[0022]
At this time, the descending amount (stroke) of the plunger 2 a is measured by a measuring device provided in the main body of the preliminary press device 2. Since this descending amount depends on the amount of the outer glass material 10 supplied into the preliminary press die 11, this is fed back and controlled so that the supplied amount of the outer glass material 10 becomes a predetermined amount. . That is, the glass supply amount is controlled to be supplied by a predetermined amount by changing the current flowing through the flow tube 1a of the outer layer glass material supply apparatus 1 depending on the feedback amount. When the pressing is completed, the plunger 2 a returns to its original position, and the preliminary pressing die 11 is returned to the die carrier 12 by the lifting device 23. The mold carrier 12 conveys this to the position of the original outer layer glass supply apparatus 1.
[0023]
(3) Outer glass heating and preliminary blowing process
When the preliminary press molding step is completed, the preliminary blow head 2d is pressed against the plunger ring 2b instead of the plunger 2a, and a predetermined preliminary blowing is performed. Further, the burner 20 approaches the parison 10a and heats it for a predetermined time. At this time, an image of the parison 10a is taken by an imaging device (not shown), and the length of the parison 10a is measured by image processing. This length determines whether or not the blow molding in the subsequent process is appropriately performed. Therefore, this length is fed back, the preliminary blowing time and / or the heating time by the burner 20 are adjusted, and the length of the parison 10a is controlled to be a predetermined length. In addition, in the case of the gold red mentioned above, it is thought that red color develops at this process.
[0024]
(4) Blow molding process of outer layer glass
When the outer glass heating / preliminary blowing step is completed, the neck ring carrier 22 rotates and conveys the parison 10a held by the neck ring 21 to the position of the blow molding device 3. At this position, the mold carrier 32 is disposed below the neck ring carrier 22, and the blow mold 31 is held in the holding hole 32a. When the parison 10a is positioned directly above the blow mold 31, the elevating device 33 installed below operates to push the blow mold 31 to an appropriate position and receive the parison 10a.
[0025]
On the other hand, the blow head 3a, which is the blowing port of the blow molding device 3, is pressed against the upper surface of the neck ring 21, and blow molding is performed. This blow molding is blown uniformly into the mold 31 to a predetermined thickness, and at the same time, in order to control the thickness of the cut portion so that the cutting is performed stably in the next cutting step. It is.
[0026]
(5) Moyle cutting process
When the blow molding process is finished, the moile 10b, which is an unnecessary upper part of the molded product, is cut. The cutting of the moile 10b is performed by blowing the flame of the cutting burner 30 to the cutting portion while rotating the parison 10a by the lifting device 33 or a neck ring rotating device (not shown). Thereby, the foil 10b is removed and the outer glass intermediate molded product 10c is obtained. The outer glass intermediate molded product 10c is conveyed to the position of the inner glass material supply device 4 by the mold carrier 32 in a state of being housed in the blow mold 31. In the case of gold red, it can be confirmed that red is colored in this step.
[0027]
(6) Inner glass supply process
In this step, the inner glass material 40 is supplied into the outer glass intermediate molded product 10c. This step is substantially the same as the above step (1) except that the glass material to be supplied is an inner layer glass material, and the apparatus used is also the same. That is, the inner layer glass material 40 is supplied by the flow tube 4a into the outer layer glass intermediate molded product 10C accommodated in the blow molding die 31. At this time, the blow molding die 31 is raised by the lifting device 43 to facilitate the material supply. When this material supply is completed, the mold carrier 32 rotates and the outer layer glass intermediate molded product 10C supplied with the inner layer glass material 40 is transported together with the blow molding die 31, and the pre-pressing device 5 of the color-covered glass pre-pressing device 5 is used. Place in position.
[0028]
(7) Pre-pressing process for colored glass
At this time, a neck ring 51 held by a neck ring carrier 52 is arranged on the outer glass intermediate product 10C including the inner glass material 40 arranged at the position of the preliminary press device 5, A lifting device 53 is installed below. By lowering the plunger 5a of the pre-pressing device 5, pre-press molding of the colored glass is performed in substantially the same manner as in the above step (2). Also in this step, as in the case of the above-mentioned step (2), the amount of the inner-layer glass material 40 is measured from the descending amount of the plunger 5a, and this is fed back so that the supply amount becomes constant. Control to adjust the current passing through the tube 4a is performed. When this step is completed, a color-covered parison 41a is obtained in which the inner glass intermediate molded product 40a is provided in close contact with the outer glass intermediate molded product 10c.
[0029]
(8) Heating / preliminary blowing process for colored glass
After the pre-press molding process of the tinted glass, a heating / pre-blowing process of the tinted glass is performed by a process substantially similar to the above process (3). That is, heating by the burner 50 and preliminary blowing by the blow head 5d are performed to form a color-covered parison 41a having a predetermined length. The color-covered parison 41 a is conveyed to the position of the color-glass blow molding device 6 by the neck ring carrier 52 while being held by the neck ring 51.
[0030]
(9) Colored glass blow molding process
The blow head 6a of the blow molding device 6 is pressed against the upper surface of the neck ring 51 conveyed to the position of the blow molding device 6 while holding the color covering parison 41a, and the color covering parison 41a is blown. A finishing mold 61 is placed. The blow finish mold 61 has a split structure and is opened and closed by a driving device 61a to store the color-covered parison 41a. Further, the blow molding is performed while rotating the color-covered parison 41a by rotating the bottom mold 63a, the blow head 6a, and the neck ring 51. Thereby, the colored glass molded product 41b is obtained.
[0031]
(10) Molded product removal process
When the blow molding process of the colored glass molded product 41b is completed, the blow finish mold 61, the bottom mold 63a, the blow head 6a, and the like are removed, and the neck ring carrier 52 rotates and is held by the neck ring 51. The colored glass molded product 41b is conveyed to the molded product take-out position, the claw portion 5c of the neck ring 51 is opened and taken out, and sent to the next step.
[0032]
(11) Slow cooling process
The taken-out colored glass molded product is transported to a slow cooling furnace and cooled to room temperature in order to remove distortion. In the slow cooling furnace, after slow cooling is performed for a predetermined time in an environment with a predetermined temperature gradient, the strain is removed and then it is sent to the next step.
[0033]
(12) Moyle cutting process for colored glass molded products
The colored glass molded product at this time is provided with a moire part that is necessary in the molding process, and is cut and removed because it is unnecessary as a product.
[0034]
(13) Cut / decoration process
By applying various types of cut processing to the product material from which the moire portion has been cut and removed, a part of the outer layer is peeled off so that the inner layer glass appears. By this step, the color contrast between the outer layer glass and the inner layer glass is obtained, and an excellent decoration effect is produced.
[0035]
(14) Acid polishing process
Since the cut surface is left with processed streaks and opaque skin, acid treatment is performed and the surface is polished to obtain a finished product.
[0036]
(15) Inspection / packaging process
The finished product is packaged and shipped as a product after undergoing various inspection processes.
[0037]
When the tumbler, the cold tea cup, the sake drink, the vase, and the like were produced by the method and apparatus for producing the colored glass product according to the above-described embodiment, the following results were obtained. In other words, it is possible to obtain a product with a uniform thickness on the outer layer glass, and also adjust the thickness of the outer layer of the product, for example, thicken the mouth to reduce the thickness near the bottom, or conversely reduce the thickness of the mouth. Then, adjustment such as increasing the thickness near the bottom is easily controlled by changing the shape of the inner surface of the outer glass pre-press mold 11 and the shape of the plunger 2a, or adjusting the length of the parison 10a. It became possible.
[0038]
As a result, even when a deformed tumbler, for example, a mouth having a wide shape and a bottom having a small shape, the thickness of the outer layer in a product state can be made uniform. The uneven thickness of the outer layer portion in the product circumferential direction can be easily obtained by adjusting the center of the outer glass pre-pressing mold 11 and the center of the plunger 2a in the outer glass pre-pressing step (2), and the reproducibility. Can be removed. All of these factors were a major factor in reducing the yield because manual manufacturing required advanced craftsmanship skills and it was difficult to obtain reproducibility.
[0039]
Moreover, since the outer layer glass was made by blow molding, the outer layer glass and the inner layer glass in the state of the product were well-matched and the boundary line was not conspicuous, and excellent quality could be made. In particular, in the case of a crystal glass product, the aesthetic appearance is excellent due to the sense of weight, transparency, high light refractive index, and contrast with colored glass.
[0040]
In addition, since this embodiment is a fully automated process, there is no need for direct human intervention for molding, and one person only needs to make fine adjustments for monitoring work and quality maintenance. became. Moreover, since the adjustment method is digitalized and reproducible, it can be operated even by personnel who do not require special skills and can operate for 24 hours. As a result, it was possible to produce colored products that were very expensive because they could only be molded by a plurality of personnel within a limited amount of time.
[0041]
In the above-described embodiment, as a method of measuring the supply amount of the outer layer glass material, a method of measuring the descending amount of the plunger of the preliminary press device is used. The weight of the outer layer glass including the mold may be measured by a weight measuring device such as a load cell, or the state of flowing out from the flow tube 1a may be photographed by an imaging device and measured by image processing.
[0042]
In addition, as a method for measuring the length of the parison of the outer glass layer, an image processing method using an imaging device is employed. For example, this is an optical measurement method such as a well-known length measurement sensor using parallel light. Etc. may be used.
[0043]
【The invention's effect】
As described above in detail, the present invention is an outer layer glass that forms an intermediate molded product of an outer layer glass by forming a predetermined amount of an outer layer glass material supplied from a glass material supply means as a method for producing a colored glass product. An intermediate molded product manufacturing step, and a colored glass molded product manufacturing step for obtaining a colored glass molded product by supplying and molding an inner glass material in the intermediate molded product of the outer glass, The outer glass intermediate molded article production process is a preliminary pressing process in which the outer glass material is pre-pressed to form a parison, and the parison formed in the preliminary pressing process is blown to form an outer glass intermediate molded article. A blow molding process for producing the colored glass molded product, and the inner glass member supplied in the outer glass intermediate molded product. A preliminary press process for pre-pressing the material for forming the glass to form a color-covered parison; Therefore, it is possible to stably produce a tinted glass product having a uniform quality and having an outer glass layer having a desired thickness, particularly a thin outer glass layer, and relatively easily. The manufacturing method and apparatus of the colored glass product which can automate manufacture are obtained. In particular, the present invention provides a crystal glass colored glass having an excellent aesthetic appearance.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a flowchart of all steps of a method for producing a colored glass product according to an embodiment of the present invention.
FIG. 2 is a detailed process explanatory diagram of a characteristic part of a method for manufacturing a colored glass product according to an embodiment of the invention.
FIG. 3 is a detailed process explanatory diagram of a characteristic part of the method for manufacturing a colored glass product according to the embodiment of the present invention.
FIG. 4 is a plan view showing a schematic configuration of an apparatus for carrying out a method for producing a colored glass product according to an embodiment of the present invention.
5 is a cross-sectional view showing a configuration of each part of the apparatus shown in FIG. 4. FIG.
6 is a cross-sectional view showing a configuration of each part of the apparatus shown in FIG.
7 is a cross-sectional view showing a configuration of each part of the apparatus shown in FIG. 4;
[Explanation of symbols]
1 Outer glass material supply device
2 Preliminary press equipment
3 Blow molding equipment
4 Inner layer glass material supply device
5 Preliminary press equipment
6 Blow molding equipment
10 Materials for outer glass
10a Parison
10c Outer glass intermediate molded product
40 Materials for inner glass
41a Colored parison
41b Covered glass molded product

Claims (4)

In the method for producing a colored glass product for producing a colored glass product obtained by covering the inner glass with the outer glass as a colored glass,
An outer layer glass intermediate molded product production step of forming a predetermined amount of the outer layer glass material supplied from the glass material supply means to form an intermediate molded product of the outer layer glass;
By supplying and molding the material for the inner layer glass in the intermediate molded product of the outer glass layer, and having a colored glass molded product preparation step for obtaining a colored glass molded product,
The outer layer glass intermediate molded article production process includes a preliminary press process in which the outer glass layer material is pre-pressed to form a parison, and a parison formed in the preliminary press process is blown to form an outer glass intermediate mold. A blow molding process for producing a product,
The colored glass molded article production process is formed by a preliminary pressing process in which the inner glass layer material supplied into the outer glass intermediate molded article is pre-pressed to form a colored parison, and this preliminary pressing process. And a blow molding step of blow molding the colored parison to form a colored glass molded product. In the manufacturing method of the colored glass product of Claim 1 ,
In the outer layer glass intermediate molded article production step, the amount of the outer layer glass material supplied from the glass material supply unit is measured, and the amount of the outer layer glass material supplied from the glass material supply unit based on the measurement result A method for producing a colored glass product, characterized in that control is performed. In the manufacturing method of the colored glass product in any one of Claims 1-2 ,
In the middle of the preliminary press step and the blow molding step in the outer layer glass intermediate molded article production step, the parison obtained in the preliminary press step is subjected to heat treatment and / or preliminary blow treatment, and the length of the parison after these treatments A method for producing a color-covered glass product, comprising measuring the length and controlling the time of the heat treatment and / or the preliminary blowing treatment so that the length becomes a predetermined length. In the manufacturing apparatus of the colored glass product for manufacturing the colored glass product obtained by covering the inner glass with the outer glass as the colored glass,
An outer glass material supply device for supplying a predetermined outer glass material;
A pre-press molding device for pre-pressing a predetermined amount of the outer glass material supplied by the outer glass material supply device to form a parison;
A blow molding device for blow molding the parison formed by the preliminary press molding device to obtain an intermediate molded product of the outer glass layer,
An inner layer glass material supply device for supplying an inner layer glass material to an intermediate molded product of the outer layer glass obtained by the blow molding device;
A pre-press molding device that pre-presses the inner layer glass material in the outer layer glass intermediate molded product to form a colored parison;
An apparatus for producing a colored glass product, comprising: a blow molding apparatus for blow-molding a colored parison formed by the preliminary press molding apparatus to form a colored glass molded product.

Images