JP2767331B2 - Glass forming equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass forming apparatus,
In particular, in a glass forming apparatus provided with means for pressing and molding the molten glass lump housed in the bottom mold, the positional relationship between the bottom mold and the molten glass lump contained is corrected by image processing, and a predetermined glass molded article with high yield is obtained. The present invention relates to a glass forming apparatus capable of obtaining a glass.

[0002]

2. Description of the Related Art As means for obtaining a predetermined glass molded product,
2. Description of the Related Art There is known an apparatus having a mechanism for supplying and housing a molten glass lump in a sequentially supplied bottom mold and then press-molding the molten glass lump. In this type of glass forming apparatus, it is important whether or not the positional relationship between the bottom mold and the molten glass lump supplied and accommodated in the bottom mold is appropriate. That is, depending on the position of the molten glass lump in the bottom mold, the molten glass flows out, etc., so that there is a problem that a defective product such as insufficient thickness and cracks are observed in the press molding.

[0003] Conventionally, to solve such a problem, the shape of the glass molded article to be molded, in other words, the appropriateness of the molten glass lump in the bottom mold is determined by the experience or intuition of each worker for each bottom mold. By recognizing the correct position and changing the funnel based on this recognition,
Positioning is performed during the press molding process.

[0004]

However, since the experience or intuition of the worker or the visual control of the worker is naturally limited, there are still the following problems, and the yield, productivity, and automation of manufacturing are still present. Etc. are impaired. First, since the position of the molten glass lump supplied and accommodated in the bottom mold is not grasped as numerical data, fine adjustment of the positioning of the molten glass lump in the press molding process cannot be performed. Secondly, the reproducibility of positioning of the molten glass lump in the press molding process is poor. Therefore, in the finally obtained glass molded product,
There remains a problem that the unevenness in the amount of glass tends to cause a shortage of meat, outflow of glass (coiling from the bottom mold, waste), cracks (damage of molded products), and the like. In consideration of the lack of meat due to the occurrence of the deviation in the amount of glass, increasing the amount of molten glass lump to be supplied and accommodated in the bottom mold cannot cope with a reduction in the weight of a glass molded product. However, there is a serious problem such as an increase in the cost of a glass molded product (increase in material cost).
The present invention has been made in view of such circumstances,
Easily and numerically grasp the position of the molten glass lump supplied and stored in the bottom mold, and properly maintain the position of the molten glass lump in the pressing molding process by fine adjustment to perform the required glass molding. An object of the present invention is to provide a glass forming apparatus that can perform with good reproducibility.

[0005]

According to the present invention, there is provided a glass forming apparatus comprising: a bottom mold for containing a molten glass lump; an imaging camera disposed above the bottom mold; and a molten glass formed by the imaging camera. Binarization means for performing image processing to binarize the imaging of the bottom mold containing the lump and binarizing the distance between the bottom mold wall surface binarized by the binarization means and the molten glass lump contained therein; A display device for outputting and displaying the area centroid position of the molten glass lump as an image / numerical value, and a melting point in which the distance to the molten glass lump output / displayed on the display device / the area centroid position of the molten glass lump is preset and stored. Position deviation deviation output means for outputting deviation amounts in x and y directions with respect to the reference value of the distance to the glass lump / the area center of gravity of the molten glass lump, and the position deviation deviation output means respectively output the deviation amounts. Deviation A funnel drive control means for driving and controlling a funnel for correcting a position for accommodating the molten glass block by driving in the x and y directions, and a molten glass block in the bottom mold whose position has been corrected by the funnel drive control section. And press forming means for performing press forming.

[0006]

According to the above-mentioned glass forming apparatus, the molten glass lump accommodated in the bottom mold is accurately located by the numerical data and the image. That is, the center of gravity of the area of the molten glass lump housed in the bottom mold is output and displayed on the display device as images and numerical values, and the reference value of the area center of gravity of the area of the molten glass lump previously set and stored is used. For x,
It is output as a deviation amount for each y direction. With this output, the center of gravity of the area of the molten glass lump accommodated in the bottom mold is always corrected with high precision and automatically, and is pressed and formed. It is possible to form a glass molded product having a predetermined shape and a predetermined dimension.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an example of a configuration of a main part of a glass forming apparatus according to the present invention, wherein 1 is a bottom mold for housing a molten glass lump 2 and 3 is disposed above the bottom mold 1. The photographing camera, for example, a television camera, 4 is a binarizing means for binarizing the image of the bottom mold 1 containing the molten glass lump 2 by the imaging camera 3 by image processing. This point will be described in further detail. When the bottom mold 1 that accommodates the molten glass lump 2 is imaged by the imaging camera (for example, a television camera) 3 disposed above the bottom mold 1, the bottom mold 1 Molten glass lump 2 (eg 1200 ° C.
) Is captured as a sharper image. Therefore, the molten glass lump 2 and the bottom mold 1 accommodating the molten glass lump 2 are incorporated in the binarizing means 4 as separate signals via a sequence circuit normally provided in this type of glass forming apparatus. The image is easily processed and binarized by the image processing device 4a. The binarizing means 4 is a built-in image processing apparatus 4a, which is configured to detect the bottom mold 1 and the molten glass lump 2 contained therein.
The distance from the bottom mold 1 wall surface (each wall surface) to the accommodated molten glass lump 2 and the area center of gravity position of the molten glass lump 2 are images and numerical values. To output and display on CRT5. On the other hand, in the image processing device 4a, the area center of gravity of the molten glass lump which is a reference value is set and stored in advance. Then, the CRT
The area centroid position of the molten glass lump 2 output and displayed in 5 is:
With respect to the previously set / stored reference value of the center of gravity of the area of the molten glass lump, the deviation amount for each of the x and y directions is defined as:
It is output by a displacement deviation amount output means built in the image processing device 4a. FIG. 2 schematically shows an example in which the distance from the bottom mold 1 wall surface (each wall surface) to the housed molten glass lump 2 and the area center of gravity of the molten glass lump 2 are displayed as images and numerical values on the CRT 5. This is shown in FIG. In the figure, a, b, c, and d indicate the bottom mold 1
Represents the distance from the four side walls to the molten glass lump 2 by numerical values, and e represents the area centroid position of the molten glass lump 2 by x-coordinate and y-coordinate. The value may be compared with a reference value or a standard value (appropriate value), and is output as a deviation amount for each of the x and y directions with respect to the reference value of the area center of gravity of the molten glass block.

Reference numeral 6 denotes a position shift of the bottom mold 1 for accommodating the molten glass lump 2 which is driven in the x and y directions in accordance with the respective deviation amounts outputted by the position deviation deviation amount output means. This is funnel drive control means for controlling the drive of the funnel to be driven. The funnel drive control means 6
The movement of the funnel in the x direction by the servo motor 6a for driving the funnel and the funnel in the y direction by the servo motor 6b for driving the funnel in accordance with the deviation amount output by the position deviation deviation amount output means. It plays a role of controlling the movement of each.

FIG. 3 is a cross-sectional view showing the movement or driving mechanism of the funnel. For example, the movement (driving) of the funnel 7 in the x direction is performed as follows. That is, the funnel driving servo motor 6a
Is rotationally decelerated by a serially connected speed reducer 8, the rotational drive is converted into linear motion by a linear motion transmitter 9, and the funnel 7 is moved (driven) in the x direction. For example, in FIG. 2, the reference value (reference position) f of the area center of gravity of the molten glass block is:
Assuming that the displacement of the area center of gravity position e of the molten glass block 2 is xmm, the data of the displacement xmm is transmitted from the image processing device 4a to the funnel drive control means 6 as a digital signal, and the displacement of xmm is transmitted. In order to compensate for the (deviation amount), the movement amount corresponding to the xmm deviation amount, the funnel 7
Is moved in the direction A (FIG. 3) by the funnel drive control means 6 to rotate the funnel drive servomotor 6a. Note that such a movement for correcting the positional deviation is similarly performed in the y direction. In this example, the bottom mold 1 is fixed to the surface of the turntable 1a, and the funnel drive control means 6 corrects the falling position of the molten glass block 2.

In this way, the bottom mold 1 is properly positioned by detecting and correcting the positional deviation or deviation of the area center of gravity e of the supplied and accommodated molten glass lump 2 easily, reliably and quantitatively. As a result, since the glass is press-formed by the press forming means 10, problems such as insufficient thickness of the glass molded product and occurrence of cracks due to the bias of the glass in the bottom mold 1 can be completely eliminated. That is, it is possible to produce a glass molded product with uniform quality with good reproducibility and mass production.

In the above description, the bottom mold 1 focuses on the positional deviation or deviation of the area center of gravity position e of the supplied and accommodated molten glass lump 2 and focuses on the positioning and correction of the bottom mold 1 in the press forming process. As an example, the distance from the four side walls of the bottom mold 1 to the molten glass lump 2 is used as numerical data, and the positioning and correction of the bottom mold 1 in the press molding process are performed by using this as a reference for positional displacement or deviation. May go.

[0013]

As described above, according to the glass forming apparatus according to the present invention, the position of the molten glass lump supplied and accommodated in the bottom mold is determined, for example, by the amount of the molten glass lump, the shear cut timing, and the like. Even if it fluctuates due to fluctuations or variations, it is possible to detect the positional deviation of the molten glass lump easily, reliably and with high accuracy. In other words, the small positional deviation of the molten glass lump supplied and accommodated in the bottom mold used for press molding can be grasped numerically, and this positional deviation is automatically corrected. It is possible to obtain a high quality glass molded product. Thus, it can be said that the glass forming apparatus according to the present invention has many practical advantages in terms of mass productivity and reliability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a main configuration of a glass forming apparatus according to the present invention.

FIG. 2 is a plan view schematically showing a mode of positioning a molten glass lump supplied and accommodated in a bottom mold in the glass forming apparatus according to the present invention.

FIG. 3 is a cross-sectional view for explaining a correcting operation of a bottom mold position by a funnel drive control unit in the glass forming apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bottom mold 1a ... Rotating table 2 ... Molten glass lump 3 ... Camera for imaging 4 ... Binarization means 4a ...
Image processing apparatus 5 CRT 6 Funnel drive control means 6a, 6b Servo motor for funnel drive
7 Funnel 8 Reduction gear 9 Linear motion transmitter

Claims (1)

(57) [Claims] 1. A bottom mold containing a molten glass lump,
An imaging camera arranged above the bottom mold; a binarizing unit for performing image processing to binarize the imaging of the bottom mold containing the molten glass mass by the imaging camera;
A display device that outputs and displays the distance from the bottom mold wall surface binarized by the binarization means to the accommodated molten glass mass and the area center of gravity of the molten glass mass as images and numerical values, and output and displayed on the display device. Distance to the molten glass lump / area center of gravity of the molten glass lump is set and stored in advance. And a funnel drive control for correcting the position for accommodating the molten glass block by driving in the x and y directions in accordance with the deviation amounts respectively output by the deviation deviation amount output means. And a press forming means for press forming the molten glass mass in the bottom mold whose position has been corrected by the funnel drive control means.