JP2005187283A - Method of cutting liquid crystal glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cut a liquid crystal glass comprising a pair of plate glasses along a cutting planned line only by conducting a cutting process comprising partial heating and partial cooling only once. <P>SOLUTION: The method of cutting the liquid crystal glass is carried out by cutting the liquid crystal glass G formed by joining a pair of plate glass 1 and 2 with many stripes of adhesive parts 4 along the cutting planned line ranging from the edge of a cutting starting part A to the edge of a cutting finishing part B between the adhesive parts 4 adjacent to each other. The cutting is conducted by previously forming notches (a), (b), (c) and (d) for cutting the starting part on the outer surfaces or the edge side surfaces of both plate glass 1 and 2 or previously forming a notch (g) for cutting the finishing part on the esge side surface of one of the plate glass 1, partially and continuously heating from the outer surface side of one of plate glass 1 and at the same time, partially and continuously cooling the partially heated part on the cutting planned line L in the cutting starting part A or on the cutting planned line L in the cutting finishing part (B) to simultaneously cut both plate glass 1 and 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a liquid crystal glass in which a pair of plate glasses are arranged facing each other with a gap in the thickness direction, and the two plate glasses are joined by a plurality of substantially parallel adhesive portions. The present invention relates to a method for cutting liquid crystal glass that cuts along a planned cutting line extending from an edge of a cutting start end portion to an edge of a cutting end portion between adhesive portions.

  As a method of cutting a plate glass, conventionally, a laser beam is irradiated from one side of the plate glass and continuously heated locally, and then the locally heated portion is continuously continued with a jet of cooling fluid from the one side. A method of cutting by locally cooling is known (for example, see Patent Document 1), and after continuously locally heating with a laser beam, a cooling means is brought into contact with the locally heated portion and continuously A method of cutting by local cooling is also known (for example, see Patent Document 2).

And also in the liquid crystal glass comprised by arrange | positioning a pair of plate glass facing each other, it was normally cut | disconnected by such a conventional method.
That is, as shown in FIG. 6A, continuous heating is continuously performed from the outer surface side of one plate glass 1 along the planned cutting line L (in the figure, 8a indicates a local heating portion). Then, the local heating portion 8a is continuously locally cooled (in the figure, 9a indicates the local cooling portion), and one plate glass 1 is cut and processed as shown in FIG. , 2 is bent and the one glass sheet 1 is completely cut and separated. Then, as shown in FIG. 6C, the other glass sheet 2 is also cut in the same manner and shown in FIG. As described above, the two glass plates 1 and 2, that is, the liquid crystal glass G were finally cut.

Japanese Patent No. 3027768 JP 2002-100590 A

Therefore, when the liquid crystal glass G is cut by a conventional method, it is necessary to cut one plate glass 1 and the other plate glass 2 separately, and thus there is a problem that the cutting process requires time and labor.
In order to solve such a problem, for example, the local heating portion 8a is continuously locally cooled while being locally heated along the cutting line L from the outer surface side of one plate glass 1. Then, it is conceivable to cut both the glass plates 1 and 2 at a stroke, but it is practically impossible to cut both the glass plates 1 and 2 at a stroke by such a method.

  Furthermore, as mentioned in the experimental results to be described later, even if one plate glass 1 is cut by forming a notch for cutting the start end portion at the cutting start end portion, Even if the notch for cutting the start end is formed at the start end of the cut and the notch for cutting the end is formed at the end of the cut, and the cutting process is performed, one of the glass sheets 1 is actually cut. However, it is not possible to cut even the other glass sheet 2 by a single cutting process.

  The present invention has been completed after various experiments by paying attention to such conventional problems, and the purpose thereof is to perform a pair of cutting processes consisting of local heating and local cooling only once. An object of the present invention is to provide a method for cutting a liquid crystal glass, which can cut a liquid crystal glass made of a plate glass beautifully along the planned cutting line.

  A first characteristic configuration of the present invention is a liquid crystal glass in which a pair of plate glasses are arranged facing each other with a gap in the thickness direction, and the two plate glasses are joined by a plurality of substantially parallel adhesive portions. A method of cutting liquid crystal glass along a planned cutting line extending from an edge of a cutting start end portion to an edge of a cutting end portion between the adhering portions adjacent to each other. In the state where the notch for cutting the start end portion is formed in advance on the outer surface or edge side surface of the plate glass, while continuously heating locally along the planned cutting line from the outer surface side of the one plate glass, The local heating portion is continuously locally cooled to cut both the glass plates at the same time.

According to the first characteristic configuration of the present invention, a state in which a notch for cutting the start end portion is formed in advance on the outer surface or the edge side surface of the both plate glasses on the planned cutting line of the cut start end portion in the both glass plates constituting the liquid crystal glass. Then, while continuously heating locally along the cutting line from the outer surface side of one plate glass, by continuously cooling and cutting the locally heated portion continuously by one cutting process step Both plate glasses can be cut simultaneously.
The reason is that, as can be inferred from the experimental results to be described later, the thermal stress generated by the cutting process on one plate glass has a large influence on the other plate glass with the notch for cutting the start end formed on the other plate glass as a foothold. In addition, it is considered that the bonded portion binds and constrains both plate glasses, and as a result, a cutting process consisting of local heating and local cooling is performed once, and a pair of plate glasses is used. The liquid crystal glass can be cut beautifully along the planned cutting line.

  The second characteristic configuration of the present invention is that cutting is performed in a state in which a notch for cutting the end portion is formed in advance on the outer surface of one plate glass on the planned cutting line of the cutting end portion.

  According to the second characteristic configuration of the present invention, since the notch for cutting the end portion is formed in advance on the outer surface of one of the plate glasses on the planned cutting line of the cutting end portion, the liquid crystal is more reliably obtained. The glass can be cut beautifully along the planned cutting line.

  The third characteristic configuration of the present invention is that cutting is performed in a state in which a notch for cutting the end portion is formed in advance on the outer surface of the other plate glass on the planned cutting line of the cutting end portion.

  According to the third characteristic configuration of the present invention, on the planned cutting line of the cutting end portion, cutting is performed in a state in which a notch for cutting the end portion is formed in advance on the outer surface of the other plate glass. The liquid crystal glass can be cut even more beautifully along the planned cutting line, especially when the notch for cutting the end portion is formed on one plate glass and the outer surface of the other plate glass, respectively. The effect is also remarkable.

  A fourth characteristic configuration of the present invention is a liquid crystal glass in which a pair of plate glasses are arranged facing each other with a gap in the thickness direction, and both the plate glasses are joined by a plurality of substantially parallel adhesive portions. A method of cutting liquid crystal glass along a planned cutting line extending from an edge of a cutting start end portion to an edge of a cutting end portion between the adhering portions adjacent to each other. A notch for cutting the start end portion is formed in advance on the outer surface or edge side surface of the plate glass, and a notch for cutting the end portion is formed in advance on the edge side surface of one plate glass on the planned cutting line of the cutting end portion. In the state, while continuously heating locally along the planned cutting line from the outer surface side of the one glass sheet, the local heating portion is continuously locally cooled, the both glass sheets are There is to be at the time of cutting.

According to the fourth characteristic configuration of the present invention, on the planned cutting line of the cutting start end portion in the both glass plates constituting the liquid crystal glass, a notch for cutting the start end portion is formed in advance on the outer surface or the edge side surface of both plate glasses, And, on the planned cutting line of the cutting end portion, in a state where a notch for cutting the terminal end portion is previously formed on the edge side surface of one plate glass, it is continuously localized along the planned cutting line from the outer surface side of one plate glass. By continuously cooling the locally heated portion while being heated and continuously cutting it, both glass sheets can be cut simultaneously by a single cutting process.
The reason can be presumed to be the same as the reason described above, and in this case, the cutting process consisting of local heating and local cooling is performed once, and the liquid crystal glass consisting of a pair of plate glasses is used as the planned cutting line. It is possible to cut it beautifully along.

  A fifth characteristic configuration of the present invention is that cutting is performed in a state in which a notch for cutting the end portion is formed in advance on the edge side surface of the other plate glass on the planned cutting line of the cutting end portion.

  According to the fifth characteristic configuration of the present invention, the cutting is performed in a state in which a notch for cutting the end portion is formed in advance on the edge side surface of the other plate glass on the planned cutting line of the cutting end portion. The glass can be cut beautifully along the planned cutting line.

An embodiment of a method for cutting liquid crystal glass according to the present invention will be described with reference to the drawings.
This cutting method relates to a method of cutting a liquid crystal glass G as shown in FIGS. 4 and 5, and the liquid crystal glass G itself has a pair of plate glasses 1 and 2 facing each other with a gap 3 in the thickness direction. The two glass plates 1 and 2 are joined to each other by a plurality of substantially parallel bonding portions 4 made of thermosetting resin.
In order to cut the liquid crystal glass G, an appropriate cutting device can be used. For example, a cutting device 5 as shown in FIGS. 1 to 3 is used.

The cutting device 5 includes a stage 6 that moves along the conveying direction L1. The liquid crystal glass G is placed on the stage 6, and a cutting end portion is formed from the edge of the cutting start end portion A between the adhering portions 4 adjacent to each other. The liquid crystal glass G is cut along the planned cutting line L extending over the edge of B and substantially parallel to the bonding portion 4.
Therefore, the main body 7 of the cutting device 5 includes a local heating means 8 that continuously heats locally from one plate glass 1 along the planned cutting line L of the liquid crystal glass G, and local heating of the plate glass 1 by the local heating means 8. Similarly, a contact 9 is provided as a local cooling means for locally cooling the portion 8a continuously from one plate glass 1 side and cutting the liquid crystal glass G along the planned cutting line L.

The local heating means 8 includes a laser oscillator 10 and an optical unit 11 for shaping a laser beam, that is, an optical unit 11 including a beam expander 11a, a reflecting mirror 11b, a cylindrical lens 11c, and the like, as shown in FIG. In addition, a cylindrical lens 11c constituting the optical unit 11 is configured so as to form a local heating portion 8a by focusing on a shape like an ellipse elongated in the direction of the cutting line L with respect to one plate glass 1. It is attached to an elevating plate 12 configured to be movable up and down with respect to the apparatus body 7.
The laser serving as the heat source for the local heating means 8 may be of any wavelength that can be absorbed by the glass plates 1 and 2. For example, a carbon dioxide laser with a wavelength of 10.6 μm is optimal, but it is not limited to a laser. In addition, a halogen lamp or a xenon lamp can be used as a heat source, and the local heating portion 8a is not necessarily limited to a shape like an elongated ellipse.

A contactor 9 as a local cooling means is made of aluminum and is attached to an elevating plate 12. The contactor 9 is pressed downward by a spring 13, and a refrigerant tank 14 for storing liquid nitrogen as a refrigerant is placed and fixed on the upper surface thereof. 3 is cooled by liquid nitrogen circulated and supplied to the refrigerant tank 14 to cool the local cooling portion indicated by the imaginary line 9a in FIG. 3, and the local heating portion 8a after being locally heated by the local heating means 8 is locally It is configured to cool down.
The cutting device 5 having such a configuration floats and is maintained at a position away from the upper surface of the liquid crystal glass G by air ejected from an air ejection port 15 provided on the lower surface of the device body 7. The relative movement direction L2 with respect to the glass G, that is, the movement direction L2 of the cutting device 5 with respect to the liquid crystal glass G when it is assumed that the liquid crystal glass G is stopped (in this embodiment, the liquid crystal glass G is transported and moved. Therefore, the local heating means 8 and the contact 9 are arranged in this order from the front to the rear of the liquid crystal glass G in the direction opposite to the conveyance direction L1.

According to this cutting device 5, the liquid crystal glass G is placed on the stage 6 and transported along the transport direction L <b> 1, and the device main body 7 is liquid crystal glass G by the air ejected from the air ejection port 15. The levitation is reliably maintained at a position separated from the upper surface by a predetermined distance.
With respect to the liquid crystal glass G, first, the local heating means 8 forms an elongated local heating portion 8a while the liquid crystal glass G is cut along the planned cutting line L along one of the plate glasses, that is, outside the plate glass 1 positioned on the upper surface. Continuous local heating from the surface side. Thereafter, following the local heating, the contact 9 is brought into contact with the outer surface of the plate glass 1 located on the upper surface with a substantially constant pressing force, and the local heating portion 8a is continuously and locally formed while forming the local cooling portion 9a. The liquid crystal glass G is cut along the planned cutting line L after cooling.

  Next, the first and second embodiments of the method for cutting the liquid crystal glass G using the cutting device 5 will be specifically described.

(First embodiment)
In the first embodiment, as shown in FIG. 4 and FIG. 5 (a), the outer surfaces of the two glass plates 1 and 2 are positioned on the planned cutting line L at the cutting start end A of the liquid crystal glass G. The notches a and b for cutting the start end are respectively formed in advance, or as shown in FIG. 4 and FIG. Cutouts c and d are formed respectively. More preferably, in the cutting end portion B of the liquid crystal glass G, notches e and f for cutting the end portions are formed in advance on the outer surfaces of the two glass plates 1 and 2 in a state of being located on the planned cutting line L. Keep it.
Then, as described above, the local heating portion 8a is continuously moved by the contact 9 while the local heating means 8 continuously performs local heating from the outer surface side of the plate glass 1 positioned on the upper surface along the planned cutting line L. The liquid crystal glass G is cut by continuous local cooling.
Accordingly, it has been confirmed by experiments that the upper and lower glass sheets 1 and 2 can be beautifully cut along the planned cutting line L by executing the cutting process step once.

(Second Embodiment)
Also in the second embodiment, in the same manner as in the first embodiment, at the cutting start end portion A of the liquid crystal glass G, the outer glass surfaces or the edge side surfaces of the two glass plates 1 and 2 are preliminarily positioned on the planned cutting line L. Cutouts a, b, c, and d for cutting the start end are formed. And in the cutting termination part B of the liquid crystal glass G, instead of forming notches e and f for terminating part cutting in advance on the outer surfaces of the two glass plates 1 and 2 in a state of being located on the planned cutting line L. Further, notches g and h for cutting the end portions are formed in advance on the side surfaces of the two glass plates 1 and 2, respectively.
Then, the local heating portion 8a is continuously locally cooled by the contact 9 while the local heating means 8 continuously performs local heating along the planned cutting line L from the outer surface side of the plate glass 1 positioned on the upper surface. Then, the liquid crystal glass G is cut, and in this case, it is confirmed by experiments that the upper and lower plate glasses 1 and 2 can be cut beautifully along the planned cutting line L by executing the cutting process once. It was.

More specifically, the above experimental results will be described. First, only the upper glass plate 1 of the two glass plates 1 and 2 is formed with a notch a or c for starting edge cutting at the cutting edge A. When the cutting process was performed, only the upper glass sheet 1 was cut, and uncut residue was generated at the cutting end portion B of the upper glass sheet 1.
Further, only in the glass plate 1 on the upper surface, the cut end a or c for cutting the start end portion was formed at the cutting start end portion A, and the cut end e cutting portion e or g was formed at the cutting end portion B for cutting treatment. However, only the upper glass sheet 1 was cut beautifully along the planned cutting line L.

Furthermore, the notch a or c for starting edge part cutting is formed in the cutting | disconnection start end part A in the plate glass 1 of an upper surface, and the notch b for starting end part cutting | disconnection in the cutting | disconnection starting end part A also in the lower glass sheet 2 or When d was formed and the cutting process was performed, the upper and lower two sheet glasses 1 and 2 were beautifully cut along the planned cutting line L by a single cutting process.
As a precaution, notches a or c and b or d for cutting the start edge are formed in the glass sheet 1 on the upper surface and the glass sheet 2 on the lower surface, and then a notch for cutting the terminal edge is formed on the glass sheet 1 on the upper surface. When e or g was formed and cut, the upper and lower two glass sheets 1 and 2 were cut beautifully along the planned cutting line L by a single cutting process.
Further, notches a or c and b or d are formed in the top plate glass 1 and the bottom plate glass 2, and the end portion cutting is cut in the top plate glass 1 and the bottom plate glass 2. When the cuts e or g and f or h were formed and the cutting process was performed, the upper and lower two glass sheets 1 and 2 were also cut beautifully along the planned cutting line L by a single cutting process.

In this way, the reason why the lower glass sheet 2 can be cut at once by cutting only the upper glass sheet 1 is that the bonding part 4 joins the two glass sheets 1 and 2 together to restrain each other. I guessed it, and conducted another experiment to support it.
That is, the same experiment as described above was performed by simply superimposing the two glass plates 1 and 2 without joining them at the bonding portion 4.
As a result, only the top plate glass 1 is cut by forming the notch a or c for cutting the start end at the cutting start end A and cutting the top end glass B only at the top plate glass 1. In addition, a cutout a or c for cutting the start end portion is formed at the cutting start end portion A, and a cutout e or g for cutting the end portion is formed at the cutting end portion B. As a result of the cutting process, only the upper glass sheet 1 was cut beautifully along the planned cutting line L.
The above experimental results are not particularly different from the case where the two glass plates 1 and 2 are joined by the bonding portion 4.

However, in the plate glass 1 on the upper surface, the notch a or c for cutting the start end is formed at the cutting start end A, the notch e or g for cutting the end end is formed at the cutting end B, and the lower surface In the case of the plate glass 2 as well, when the cut end b for cutting the start end portion is formed at the cut start end portion A, only the top plate glass 1 is cut beautifully along the planned cutting line L, The plate glass 2 was not cut.
Thus, in order to cut the upper and lower glass sheets 1 and 2 at a time by a single cutting process, the two glass sheets 1 and 2 must be joined and bound to each other by the bonding portion 4, and the above assumption is made. It turns out to be correct.

  In each of the above experiments, a plate glass having a width of 20 mm, a length of 100 mm and a thickness of 0.7 mm was used as the both glass plates 1 and 2, and a carbon dioxide laser with a laser output of 35 W was used as the local heating means 8. The experiment was carried out by adjusting the local heating portion 8a to have a length of 8.0 mm and a width of 2.0 mm.

[Another embodiment]
In the previous embodiment, an example in which a laser is used as the heat source of the local heating means 8 has been described. However, as described above, a halogen lamp or a xenon lamp can also be used as a heat source. However, it is not particularly limited to the contact, and for example, it is constituted by a cooling means using a Peltier element, or a local cooling means is constituted by blowing a refrigerant gas or liquid directly on the upper surface of the liquid crystal glass G. You can also.

Schematic perspective view showing a cutting device Schematic side view showing the cutting device Plan view showing cut part of liquid crystal glass Liquid crystal glass perspective view Enlarged perspective view of the cutting start end of the liquid crystal glass Explanatory drawing which shows the cutting method by a prior art

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 One plate glass 2 The other plate glass 3 Gap part 4 Adhesion part A Cutting start end part B Cutting termination part G Liquid crystal glass L Planned cutting line a Notch for cutting the start edge part of one plate glass outer surface b The other plate glass outer surface Notch for cutting the start edge c Notch for cutting the start edge on one side of the glass sheet edge d Notch for cutting the start edge on the other side of the glass sheet edge e Notch for cutting the end part of the outer surface of the other glass sheet f Notch for cutting the end portion of the other outer surface of the glass sheet g Notch for cutting the end portion of the side surface of the one sheet glass h Notch for cutting the end portion of the side surface of the other glass sheet edge

Claims (5)

In a liquid crystal glass in which a pair of plate glasses are arranged facing each other with a gap in the thickness direction, and the two plate glasses are joined by a plurality of substantially parallel adhesive portions, the two plate glasses are disposed between the adjacent adhesive portions. A method of cutting liquid crystal glass that cuts along a planned cutting line extending from the edge of the cutting start end to the edge of the cutting end,
Continuing along the planned cutting line from the outer surface side of the one plate glass in a state in which a notch for cutting the starting end portion is formed in advance on the outer surface or edge side surface of both plate glasses on the planned cutting line of the cutting start end portion. A method for cutting a liquid crystal glass, in which the local heated portion is continuously locally cooled while the local glass is being locally heated to simultaneously cut both the plate glasses.   The method for cutting a liquid crystal glass according to claim 1, wherein the cutting is performed in a state in which a notch for cutting the end portion is formed in advance on the outer surface of one of the plate glasses on the planned cutting line of the cutting end portion.   3. The method for cutting a liquid crystal glass according to claim 1, wherein the cutting is performed in a state in which a notch for cutting the terminal end portion is formed in advance on the outer surface of the other plate glass on the planned cutting line of the cutting end portion. In a liquid crystal glass in which a pair of plate glasses are arranged facing each other with a gap in the thickness direction, and both the plate glasses are bonded by a plurality of substantially parallel bonding portions, the two plate glasses are disposed between the adhering portions adjacent to each other. A method of cutting liquid crystal glass that cuts along a planned cutting line extending from the edge of the cutting start end to the edge of the cutting end,
On the planned cutting line of the cutting start end part, a notch for cutting the starting end part is formed in advance on the outer surface or edge side surface of both plate glasses, and on the cutting planned line of the cutting end part, on the edge side surface of one plate glass In the state where the notch for cutting the end portion is formed in advance, the local heating portion is continuously and locally heated continuously along the planned cutting line from the outer surface side of the one plate glass. A method for cutting liquid crystal glass, wherein the two glass plates are simultaneously cut by cooling.   The cutting method of the liquid crystal glass of Claim 4 cut | disconnected in the state which formed the notch for termination | terminus part cutting | disconnection previously in the edge side surface of the other plate glass on the cutting projected line of the said cutting | disconnection termination | terminus part.

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