JP2014091660A - Method of cutting glass film laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent progress of cracking in a glass film serving as a configuration element of a laminate in cutting a glass film laminate by laser fusion cutting.SOLUTION: A method of cutting a glass film laminate is based on fusion-cutting a glass film laminate G consisting of a resin plate PP adhered with a glass film GF1 on the front surface side and with a glass film GF2 on the back surface side by irradiating with a laser L along a projected cutting line, and includes fusion-cutting the whole thickness of the glass film laminate by: carrying out front surface side fusion cutting which comprises extending fusion-cut part M through the glass film GF1 on the front surface side to a depth not reaching the glass film GF2 on the back surface side by applying a laser L from the front surface side; and back surface side fusion cutting which comprises extending fusion-cut part M through the glass film GF2 on the back surface side to a depth not reaching the glass film GF1 on the front surface side by applying a laser L from the back surface side.

Description

  The present invention relates to a method for cutting a glass film laminate in which a glass film laminate in which a glass film is bonded to the front surface side and the back surface side of a resin plate is fused by irradiating a laser.

  As is well known, glass is excellent in weather resistance, chemical resistance, and scratch resistance, but has a drawback of being easily damaged by physical impact and thermal shock. In order to eliminate this defect, a glass film laminate in which a glass film which is a thin glass plate is bonded to the front surface side and the back surface side of a transparent resin plate by an adhesive or the like as disclosed in Patent Document 1. The body has been proposed.

  Compared to glass (glass film), resin is inferior in weather resistance, chemical resistance, and scratch resistance, but has an advantage that it has smaller specific gravity than glass and is resistant to physical impact. Therefore, in this glass film laminate, the disadvantages of each of the glass film and the resin plate can be compensated for by each advantage, and the weight can be significantly reduced compared to a glass plate having the same thickness. Can do.

  By the way, in a manufacturing process of a glass film laminate, for example, when a small-area (product size) laminate is cut out from a large-area laminate, the laminate is cut by so-called laser fusing. . In other words, while irradiating the laminate with laser and removing the glass and resin melted by laser heat, in the thickness direction of the laminate, the fusing part proceeds from the laser incident side to the emission side, and It becomes the aspect which cut | disconnects (melting | fusing) the whole thickness of a laminated body.

JP 2012-25152 A

  However, when the glass film laminate is cut by laser fusing, defects may occur in the glass film that is a component of the laminate. More specifically, as shown in FIG. 5, in the glass film laminate GG, the fusing part M proceeds in the order of the glass film GF3 on the laser L incident side, the resin plate PP, and the glass film GF4 on the laser L emission side. Then, it is cut sequentially. Therefore, the stacked body GG is heated in this order by laser heat.

  Therefore, unlike the glass film GF4, the glass film GF3 completes the cutting of the resin sheet PP and the glass film GF4 even after the glass film GF3 itself is melted, and the laminate GG is completely cut. Until it is finished, the laser heat is always absorbed. As a result, an excessive amount of heat is accumulated in the glass film GF3 with respect to the amount originally required for fusing, which leads to a situation in which the glass film GF3 is excessively heated.

  When such a situation occurs, thermal stress generated due to thermal expansion when cutting the laminate GG and thermal contraction due to cooling after cutting becomes excessive, and particularly at the melted end portion, Cracks existing in the film GF3 are likely to progress, and the crack size is increased. As a result, there is a problem that the mechanical strength of the glass film GF3 is greatly reduced, and the glass film GF3 is easily damaged by an external force or an impact applied.

  This invention made | formed in view of the said situation makes it a technical subject to prevent as much as possible the progress of the crack which exists in the glass film which is a component of a laminated body, when cutting a glass film laminated body by laser cutting. .

  The present invention created in order to solve the above problems melts a glass film laminate in which a glass film is bonded to the front side and the back side of a resin plate by irradiating a laser along a planned cutting line. It is a cutting method of a glass film laminate, and by irradiating a laser from the surface side, it passes through the glass film on the surface side and advances the fusing part to a depth that does not reach the glass film on the back surface side. By irradiating a laser from the back surface side, the glass film lamination is performed by performing back surface side fusing that advances the fusing part to a depth that passes through the glass film on the back surface side and does not reach the glass film on the front surface side Characterized by fusing the entire thickness of the body. Here, the “front surface” and the “back surface” do not mean the upper surface and the lower surface of the glass film laminate in a landscape orientation, and the glass film laminate does not matter the orientation of the glass film laminate. It means the surface on one side and the surface on the other side in the two planes.

  According to such a method, it is not necessary to blow the glass film on the back side in the front surface side melting, and it is not necessary to blow the glass film on the front side in the back side melting. In addition, the amount of heat necessary for fusing the resin plate by laser irradiation is very small compared to the amount of heat necessary for fusing the glass film. Therefore, in both the front side fusing and the back side fusing, the glass on the laser incident side is used for fusing the glass film on the laser incident side after fusing the glass film on the laser incident side. There is no need to unjustly irradiate the laser with the film. As a result, it is possible to prevent excessive heat from being accumulated in the glass film on the front surface side and the back surface side with respect to the amount originally required for fusing, and the occurrence of a situation in which both glass films are excessively heated. It can be avoided. As a result, it is possible to reduce the thermal stress generated due to the thermal expansion when cutting the laminate and the thermal contraction due to the cooling after cutting, and to make the development of cracks in both glass films as possible as possible. It becomes possible to prevent.

  In said method, you may perform the said surface side fusing and the said back surface side fusing separately. Here, “separately” means that after the execution of one of the front-side fusing and the back-side fusing is completely completed, the other is started.

  If it does in this way, after performing any one among surface side fusing and back side fusing, it is a part of the calorie | heat amount accumulate | stored in both glass films when one is performed before performing the other. Alternatively, it is possible to release everything. Thereby, generation | occurrence | production of the situation where both glass films are heated excessively can be avoided more exactly.

  In said method, you may perform the said surface side fusing and the said back surface side fusing simultaneously. Here, “simultaneously” means that not only when the front-side fusing and the back-side fusing are started at the same time, but at the same time, at least a part of the front-side fusing and a part of the back-side fusing are executed at the same time. This includes cases where

  If it does in this way, a fusing part can be advanced from both the surface side and back side in a layered product. Therefore, the laminate can be cut at high speed, and the production efficiency of the laminate can be improved.

  Said method WHEREIN: It is preferable to advance the said surface side fusing part to the center part in the plate | board thickness of the said resin board by the said surface side fusing.

  If it does in this way, the calorie | heat amount accumulate | stored in the glass film of the surface side by surface side fusing and the calorie | heat amount accumulate | stored in the glass film of the back surface side by back side fusing will be substantially equalized. For this reason, it is prevented as much as possible that a big temperature difference arises between the glass film of the surface side, and the glass film of the back side. As a result, only the cracks existing in any one of the glass films can be easily developed by thermal stress, and the crack size can be prevented from becoming larger than the other.

  In said method, it is preferable that the plate | board thickness of the said glass film is 200 micrometers or less.

  The thinner the glass film is, the lower the mechanical strength of the glass film is, and the glass film is more easily damaged by an applied external force or impact. However, according to the present invention, it is possible to prevent as much as possible the occurrence of a situation in which the originally low mechanical strength of a thin glass film is further reduced due to an increase in crack size. From this, it is possible to enjoy the effects of the present invention more suitably as the plate thickness of the glass film is thinner.

  In the above method, the thickness of the resin plate is preferably 5 mm or more.

  When the resin plate that is a component of the laminate is melted, the resin near the melted end melts and flows due to the influence of laser heat. The molten resin is cooled and re-solidified after cutting the laminate, but distortion is likely to occur at the boundary between the re-solidified portion and the other resin portions. In addition, the thicker the resin plate, the greater the amount of resin that melts during fusing. However, according to the present invention, similarly to the amount of heat accumulated in the glass film, the amount of heat accumulated in the resin plate is prevented from being excessive, and the melting of the resin is suppressed. For this reason, it is possible to enjoy the effect by this invention suitably, so that the board | plate thickness of a resin board is thick.

  As described above, according to the present invention, when the glass film laminate is cut by laser fusing, it is possible to prevent the development of cracks existing in the glass film that is a component of the laminate as much as possible.

It is a perspective view which shows the cutting device used for the cutting method of the glass film laminated body which concerns on 1st embodiment of this invention. It is a vertical front view which shows the cutting method of the glass film laminated body which concerns on 1st embodiment of this invention. It is a side view which shows the cutting device used for the cutting method of the glass film laminated body which concerns on 2nd embodiment of this invention. It is a side view which shows the cutting device used for the cutting method of the glass film laminated body which concerns on 3rd embodiment of this invention. It is a vertical side view which shows the cutting method of the glass film laminated body in the past.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, “front surface” and “back surface” do not represent the upper surface and the lower surface of the horizontally placed glass film laminate, but the glass film GF1 side in the two planes of the laminate. And the surface on the glass film GF2 side.

  FIG. 1 is a perspective view showing a cutting device used in the method for cutting a glass film laminate according to the first embodiment of the present invention. As shown in the figure, the cutting device 1 includes a conveyor belt 4 that loads and conveys a glass film laminate G (hereinafter simply referred to as a laminate G) in a horizontal orientation, and a laser L applied to the laminate G that is being conveyed. And the assist gas injector 3 that injects the assist gas A to the laser L irradiation part.

  The glass film laminate G is composed of a resin plate PP and two glass films GF1 and GF2, and these are adhered by an adhesive interposed between the glass films GF1 and GF2 and the resin plate PP. They are stacked together. Here, the thickness of both glass films GF1 and GF2 is preferably 200 μm or less, more preferably 100 μm or less, and most preferably 50 μm or less. The plate thickness of the resin plate PP is preferably 5 mm or more, more preferably 8 mm or more, and most preferably 10 mm or more.

  A pair of conveyor belts 4 is provided across a planned cutting line X extending to the laminate G, and the pair of conveyor belts 4 are respectively wound around a driving roller and a driven roller (not shown). And by the rotational drive of both rollers, the conveyor belt 4 becomes a structure which can move forward / reversely along the T direction shown in the figure parallel to the cutting projected line X.

  The laser irradiator 2 is fixedly installed at a fixed position so that a planned cutting line X extending to the laminated body G passes vertically below, and collects the laser L oscillated from a laser oscillator (not shown). And it is comprised so that it may irradiate along the cutting projected line X from upper direction. In the present embodiment, a carbon dioxide gas laser is used as the laser L, and the output of the laser L is preferably in the range of 5 to 200 W.

  The assist gas injector 3 is installed in a fixed position in the same manner as the laser irradiator 2 and is inclined with respect to the two planes of the stacked body G that are directed toward the laser L irradiation portion. ing. The assist gas injector 3 is connected to an air compressor (not shown) (not shown), and injects the air compressed by the air compressor as an assist gas A onto the laser L irradiation unit. The glass melted by heat and the resin are scattered and removed by the pressure.

  From the above configuration, the cutting device 1 conveys the stacked body G loaded on the conveyor belt 4 by the movement of the conveyor belt 4 in the T direction. And while irradiating the laser L from the laser irradiator 2 along the planned cutting line X with respect to the laminate G being conveyed, the glass and the resin are melted by the laser heat, and the molten glass and the resin are melted. It is scattered and removed by the pressure of the assist gas A injected from the assist gas injector 3. Thereby, the fusing part M is advanced to the laminated body G along the planned cutting line X, and the laminated body G is cut.

  Hereinafter, the cutting method of the glass film laminated body using said cutting device 1 is demonstrated with reference to attached drawing.

  First, the conveyor belt 4 is moved in the positive direction along the T direction, so that the laminated body G is conveyed in the same direction, while the laser L is irradiated from the surface side (glass film GF1 side), and the assist gas A Inject. Thereby, as shown to Fig.2 (a), the fusing part M formed in the laminated body G sequentially passes the glass film GF1 in a plate | board thickness direction, and progresses to the center part in the plate | board thickness of the resin board PP. Let By performing this over the entire length of the planned cutting line X, the surface-side fusing is completed.

  Next, after the front surface side fusing is completed, the front surface side and the back surface side of the laminate G are reversed 180 ° on the conveyor belt 4. That is, the laminated body G stacked on the conveyor belt 4 in a state where the glass film GF2 and the conveyor belt 4 are in contact with each other is stacked on the conveyor belt 4 so that the glass film GF1 and the conveyor belt 4 are in contact with each other. Try again. In the present embodiment, this is performed manually.

  Finally, after the reversal of the laminate G is completed, the conveyor belt 4 is moved in the reverse direction along the T direction (in the opposite direction to the time when the front side fusing is performed), and the laminate G is moved in the same direction. While conveying, the laser L is irradiated from the back side (glass film GF2 side), and the assist gas A is injected. In addition, it is preferable that the output of the laser L irradiated with respect to the laminated body G at this time is equal to the time of execution of surface side fusing.

  As a result, as shown in FIG. 2 (b), the melted part M formed sequentially in the laminate G is passed through the glass film GF2 in the thickness direction, and proceeds to the center in the thickness of the resin plate PP. Let That is, in the surface-side fusing, the portion (thickness) that has not been cut is blown out. By performing this over the entire length of the planned cutting line X, the rear surface side fusing is completed.

  By the above, the fusing part M which progressed at the time of execution of the front surface side fusing and the fusing part M which has advanced at the time of execution of the back side fusing are connected at the center in the plate thickness of the resin plate PP, and the entire thickness of the laminate G is cut. The In addition, since this embodiment becomes an aspect which starts execution of back surface side fusing after front side fusing is completed completely, these are performed separately.

  According to such a method, it is not necessary to blow the glass film GF2 in the front-side fusing, and it is not necessary to cut the glass film GF1 in the back-side fusing. In addition, the amount of heat necessary for fusing the resin plate PP by irradiation of the laser L is very small compared to the amount of heat necessary for fusing both the glass films GF1 and GF2.

  For this reason, in both the front-side fusing and the back-side fusing, the glass plate GF1 (GF2) on the laser L incident side is blown, and then the resin film PP and the glass film GF2 (GF1) on the laser L emission side are blown out. For this purpose, it is not necessary to unjustly irradiate the laser L to the glass film GF1 (GF2) on the laser L incident side.

  As a result, it is possible to prevent an excessive amount of heat from being accumulated in both glass films GF1 and GF2 with respect to the amount originally required for fusing, and the occurrence of a situation in which both glass films GF1 and GF2 are excessively heated. It can be avoided. As a result, the thermal stress generated due to the thermal expansion when cutting the laminate G and the thermal contraction due to cooling after cutting can be reduced, and the cracks existing in both glass films GF1 and GF2 can be developed. It becomes possible to prevent as much as possible.

  Further, in both the front-side fusing and the back-side fusing, the fusing part M proceeds to the central part in the thickness of the resin plate PP, so that the amount of heat accumulated in the glass film GF1 by the front-side fusing and the back-side fusing The amount of heat accumulated in the glass film GF2 is substantially equalized. Thereby, it is prevented as much as possible that a big temperature difference arises between both glass film GF1, GF2. As a result, only the cracks existing in one of the glass films GF1 (GF2) are likely to develop due to thermal stress, and it is possible to avoid an increase in crack size with respect to the other glass film GF2 (GF1).

  Furthermore, by performing the front surface side fusing and the back surface side fusing separately, after executing the front surface side fusing and before executing the back surface side fusing, both glasses are used. Part or all of the heat stored in the films GF1 and GF2 can be released. For this reason, it is possible to more accurately avoid the occurrence of a situation where both glass films GF1 and GF2 are excessively heated.

  FIG. 3 is a side view showing a cutting device used in the method for cutting a glass film laminate according to the second embodiment of the present invention. In addition, in description about this cutting device 1, about the component which has the same shape or function as the cutting device 1 used for the cutting method of the glass film laminated body which concerns on said 1st embodiment, it is the same in drawing. A duplicate description is omitted by attaching a reference numeral.

  The difference between the cutting device 1 and the cutting device 1 used in the method for cutting a glass film laminate according to the first embodiment is that the conveyor belt 4 is in the U direction (one direction) shown in FIG. The laser irradiator 2 and the assist gas injector 3 (not shown) are installed not only above the laminated body G but also below the laminated body G.

  The lower laser irradiator 2 is fixed and installed at a fixed position so that a planned cutting line X extending to the stacked body G passes vertically above. Further, the installation position is a position separated from the upper laser irradiator 2 located on the upstream side to the downstream side along the U direction, and the separation distance between the two laser irradiators 2 is the U distance of the laminate G. It is set to be sufficiently longer than the length along the direction. The outputs of the lasers L emitted from both laser irradiators 2 are set to be equal to each other.

  The lower assist gas injector 3 is installed in a fixed position in the same manner as the lower laser irradiator 2, and the irradiation part of the laser L irradiated to the laminate G from the laser irradiator 2 is provided. It is oriented and is inclined with respect to the two planes of the laminate G. Note that the pressures of the assist gas A injected from the upper and lower assist gas injectors 3 are set to be equal to each other.

  Hereinafter, the cutting method of the glass film laminated body using said cutting device 1 is demonstrated.

  First, by moving the conveyor belt 4 along the U direction, the laminate G is conveyed in the same direction, while irradiating the laser L from the surface side (glass film GF1 side) and injecting the assist gas A. And perform the surface side fusing. Then, while irradiating the laser beam L from the back surface side (glass film GF2 side) with respect to the laminated body G conveyed further downstream, the assist gas A is injected and back surface side fusing is performed.

  In addition, the melted part M sequentially formed in the laminate G is advanced to the central part in the thickness of the resin plate PP in both the front surface side fusing and the back surface side fusing. Also in this embodiment, since the execution of the back side fusing is started after the front side fusing is completely completed, these are executed separately.

  According to such a method, the effect similar to the cutting method of the glass film laminated body which concerns on the above-mentioned 1st embodiment is acquired. In addition, after performing the front surface side fusing, it is possible to save the trouble of reversing the front surface side and the back surface side of the laminate G by 180 ° on the conveyor belt 4 when performing the back surface side fusing. Therefore, it becomes possible to improve the manufacturing efficiency of the laminated body G.

  FIG. 4 is a side view showing a cutting device used in the method for cutting a glass film laminate according to the third embodiment of the present invention. In addition, in description about this cutting device 1, about the cutting device 1 used for the cutting method of the glass film laminated body which concerns on said 1st and 2nd embodiment, about the component which has the same shape or function, The duplicated description is omitted by giving the same reference numerals to the drawings.

  The cutting device 1 is different from the cutting device 1 used in the glass film laminate cutting method according to the second embodiment described above in that the upper laser irradiator 2 and the lower laser irradiator 2 are separated from each other. The distance and the distance between the upper assist gas injector 3 and the lower assist gas injector 3 (both assist gas injectors 3 are not shown) are close to each other. This separation distance is sufficiently shorter than the length of the stacked body G along the U direction.

  Hereinafter, the cutting method of the glass film laminated body using said cutting device 1 is demonstrated.

  First, by moving the conveyor belt 4 along the U direction, the laminate G is conveyed in the same direction, while irradiating the laser L from the surface side (glass film GF1 side) and injecting the assist gas A. Then start the surface side fusing. And while performing this surface side fusing, while irradiating the laser L from the back side (glass film GF2 side) further, the assist gas A is injected and execution of the back side fusing is started. That is, there is a time difference between the start and end of the front-side fusing and the back-side fusing.

  The fusing part M formed sequentially in the laminate G is advanced to the central part in the thickness of the resin plate PP in either the front side fusing or the back side fusing. Moreover, in this embodiment, since execution of the back surface side fusing is started before the execution of the front surface side fusing is completely completed, these are executed at the same time.

  Even by such a method, it is possible to prevent excessive heat from being accumulated in both glass films GF1 and GF2 with respect to the amount originally required for fusing, and both glass films GF1 and GF2 are excessively heated. It becomes possible to avoid the occurrence of the situation. As a result, the progress of cracks existing in both glass films GF1 and GF2 can be prevented as much as possible.

  In addition, the amount of heat accumulated in the glass film GF1 due to the front-side fusing and the amount of heat accumulated in the glass film GF2 due to the back-side fusing are substantially equalized. Thereby, it can also be avoided that the crack size of the crack which exists in any one glass film GF1 (GF2) becomes large with respect to the other glass film GF2 (GF1).

  Furthermore, by performing the surface side fusing and the back side fusing at the same time, the fusing part M can be advanced from both the front side and the back side of the laminate G. Therefore, the laminate G can be cut at a high speed, and the production efficiency of the laminate G can be improved.

  In addition, the cutting method of the glass film laminated body which concerns on said 1st-3rd embodiment is applied when the plate | board thickness of glass film GF1, GF2 which is a component of the laminated body G used as the object of cutting is thin. Is preferred.

  The thinner the glass films GF1 and GF2, the lower their mechanical strength and they are more likely to be damaged by external forces and impacts. However, according to these methods, the occurrence of a situation in which the originally low mechanical strength of the thin glass films GF1 and GF2 is further reduced due to an increase in crack size is possible. Can be prevented. For this reason, the thinner the glass films GF1 and GF2, the better the effects of these methods can be enjoyed.

  Moreover, it is preferable to apply the cutting method of the glass film laminated body which concerns on said 1st-3rd embodiment, when the board | plate thickness of the resin board PP which is a component of the laminated body G used as the object of cutting is thick. .

  When the resin plate PP, which is a component of the laminate G, is melted, the resin near the melted end melts and flows due to the influence of laser heat. The melted resin is cooled and re-solidified after the laminate G is cut, but distortion easily occurs at the boundary between the re-solidified portion and the other resin portions. In addition, as the plate thickness of the resin plate PP is thicker, the amount of resin that melts at the time of fusing increases. However, according to these methods, similarly to the amount of heat accumulated in the glass films GF1 and GF2, it is prevented that the amount of heat accumulated in the resin plate PP is excessive, and the melting of the resin is suppressed. For this reason, the thicker the resin plate PP, the better the effects of these methods can be enjoyed.

  Here, the cutting method of the glass film laminated body which concerns on this invention is not limited to the aspect demonstrated by said each embodiment. For example, in said 1st embodiment, although it becomes the aspect which irradiates a laser only from upper direction with respect to a glass film laminated body, it is good also as an aspect irradiated only from the downward direction. Furthermore, in the first embodiment, after performing the surface side fusing, the laser irradiation device and the assist gas injector may be reversed without inverting the laminated body by 180 °. Moreover, in 2nd embodiment, after performing the surface side fusing, it is the aspect which performs a back surface side fusing, However, this order may be reverse. Similarly, also in 3rd embodiment, it is good also as an aspect by which back surface side fusing is started before surface side fusing. Furthermore, in the third embodiment, the laser irradiated from above and the laser irradiated from below are irradiated from positions shifted from each other in the transport direction of the laminated body. You may irradiate in the state. However, in order to prevent the two lasers from interfering with each other, it is preferable to irradiate from a shifted position.

  In addition, in each of the above-described embodiments, the laser irradiator is fixed at a fixed position, and the surface side fusing and the back side fusing are performed by irradiating the laser while transporting the laminate. However, it is good also as an aspect which performs a surface side fusing and a back side fusing by irradiating a laser by moving a laser irradiation machine with respect to the laminated body mounted in the fixed position. In this aspect, as in the second and third embodiments, when the laminate is irradiated from both above and below, the moving direction of the laser irradiator that irradiates them may be the same direction. However, it may be in the opposite direction. In other words, the laser irradiated from the upper laser irradiator is moved from one end side to the other end side along the planned cutting line, and the laser irradiated from the lower laser irradiator is moved from the other end side to the one end side. You may move it. Moreover, also in the aspect which moves this laser irradiator, the surface side fusing and the back surface fusing may be performed simultaneously or separately.

  In addition, in each of the above-described embodiments, the melted portion in the front surface side fusing and the melted portion in the back surface side fusing proceed to the central portion in the thickness of the resin plate to cut the entire thickness of the laminate. It is a mode to do. However, the depth of the melted portion that advances may be different between the front surface side melting and the back surface side melting. That is, it is not necessary to have an aspect in which both fusing parts are connected at the central part in the thickness of the resin plate. In each of the above embodiments, a carbon dioxide laser is used as the laser, but a picosecond semiconductor-excited solid laser or the like may be used. Furthermore, although the assist gas injector is in a posture inclined with respect to the two planes of the stacked body, the assist gas injector may be in an upright posture directed vertically downward. In other words, the laser irradiation direction and the assist gas injection direction may be parallel to each other, and the laser irradiation device and the assist gas injection device may be coaxial.

DESCRIPTION OF SYMBOLS 1 Cutting device 2 Laser irradiation device 3 Assist gas injector 4 Conveyor belt G Glass film laminated body GG Glass film laminated body GF1 Glass film GF2 Glass film GF3 Glass film GF4 Glass film PP Resin plate L Laser A Assist gas X Scheduled cutting line M Fusing part T Conveyor belt (glass film laminate) moving direction U Conveyor belt (glass film laminate) moving direction

Claims (6)

By irradiating the laser along the planned cutting line, the cutting method of the glass film laminate, which melts the glass film laminate in which the glass film is bonded to the front surface side and the back surface side of the resin plate,
By irradiating the laser from the front side, the front side fusing that advances the fusing part to a depth that passes through the front side glass film and does not reach the back side glass film,
By irradiating the laser from the back side, the glass film laminate is obtained by performing back side fusing that advances the fusing part to a depth that passes through the back side glass film and does not reach the front side glass film. A method for cutting a glass film laminate, wherein the entire thickness of the glass film is melted.   The method for cutting a glass film laminate according to claim 1, wherein the front side fusing and the back side fusing are separately performed.   The method for cutting a glass film laminate according to claim 1, wherein the front-side fusing and the back-side fusing are performed simultaneously.   The method for cutting a glass film laminate according to any one of claims 1 to 3, wherein the fusing part is advanced to the center part in the plate thickness of the resin plate by the surface side fusing.   The plate | board thickness of the said glass film is 200 micrometers or less, The cutting method of the glass film laminated body in any one of Claims 1-4 characterized by the above-mentioned.   The thickness of the said resin board is 5 mm or more, The cutting method of the glass film laminated body in any one of Claims 1-5 characterized by the above-mentioned.

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