JP2012207977A - Defect marking method, defect marking device, and defect detecting system for anti-glare die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a defect marking method capable of highly visibly marking defect without damaging an object.SOLUTION: The defect marking method for marking an object with defect using a spray gun for discharging ink drop, and a mask for shielding a part of the ink drop discharged from the spray gun includes: an arranging step for arranging the spray gun, the mask and the object in this order without coming into contact with each other; and a marking step for applying the ink drop discharged from the spray gun on the object via the mask to mark the object.

Description

  The present invention relates to a defect marking method and a defect marking apparatus for marking an object having defects. The present invention also relates to a defect detection system for a mold for anti-glare treatment.

  In an image display device such as a liquid crystal display, a plasma display panel, a cathode ray tube (CRT) display, an organic electroluminescence (EL) display, and the like, when external light is reflected on the display surface, visibility is significantly impaired. Conventionally, in order to prevent such reflection of external light, display is performed using a television or personal computer that emphasizes image quality, a video camera or digital camera that is used outdoors with strong external light, and reflected light. In a mobile phone or the like, a process for preventing external light from being reflected on the surface of the image display device is performed. The processing performed on the surface of such an image display device includes antireflection processing using interference by the optical multilayer film and prevention of blurring the reflected image by scattering incident light by forming fine irregularities on the surface. It is roughly divided into dazzling treatment. The former non-reflective treatment increases the cost because it is necessary to form a multilayer film having a uniform optical film thickness. On the other hand, since the latter anti-glare treatment can be performed relatively inexpensively, it is widely used for applications such as large personal computers and monitors.

  The antiglare treatment of the image display device is typically performed by laminating an antiglare film with antiglare properties on the surface of the image display device. Conventionally, an anti-glare film, for example, a resin solution in which fine particles are dispersed is applied on a base sheet by adjusting the film thickness, and the fine particles are exposed on the surface of the coating film so that random surface irregularities are formed on the base sheet. It is manufactured by the method of forming on top. However, the antiglare film manufactured using a resin solution in which such fine particles are dispersed has an influence on the arrangement and shape of surface irregularities depending on the dispersion state and application state of the fine particles in the resin solution. It is difficult to obtain surface irregularities as described above, and when the haze of the antiglare film is set low, there is a problem that a sufficient antiglare effect cannot be obtained. Furthermore, when such a conventional anti-glare film is disposed on the surface of the image display device, the entire display surface becomes whitish due to scattered light, and the display becomes cloudy, so-called “whiteness” is likely to occur. There was a problem. Also, with the recent high definition of image display devices, the pixels of the image display device and the surface uneven shape of the antiglare film interfere with each other, and as a result, a luminance distribution occurs and the display surface becomes difficult to see. There was also a problem that the “glare” phenomenon was likely to occur. In order to eliminate glare, there is an attempt to scatter light by providing a refractive index difference between the binder resin and the fine particles dispersed therein, but such an antiglare film is disposed on the surface of the image display device. In some cases, there is a problem that the contrast tends to be lowered due to light scattering at the interface between the fine particles and the binder resin.

  On the other hand, there is also an attempt to develop anti-glare properties only by fine irregularities formed on the surface of the transparent resin layer without containing fine particles. According to this method, the antiglare property is expressed by the shape of the surface, so that no whitening due to the fine particles occurs. Furthermore, in the method of applying a resin added with fine particles, unevenness occurs due to fluctuations in the coating thickness, so precise coating thickness control has been required, but in the method of forming fine irregularities on the surface, the coating thickness Since the problem of unevenness due to fluctuation does not occur, it is possible to achieve excellent productivity.

  As a method of forming such surface irregularities, a method of transferring the irregularities of the mold onto the surface of an object (such as a transparent resin film) using a mold having a surface irregularity formed in advance is produced. It is particularly preferably used from the viewpoint of sex. However, since the surface uneven shape of the mold is transferred, if there is a defect on the uneven surface of the mold, the defect continues to occur throughout the product (such as an antiglare film). Therefore, it is important that defects on the concave and convex surface of the mold are detected by a detection device, marking is performed on the detected defective portion, and removal or repair of the defective portion is performed using the marking as an index in a subsequent process.

  As a marking on a defective part, for example, Patent Document 1 discloses a defect marking apparatus that controls the extrusion and retraction of an oil-based marking pen and marks the defective part of a sheet-like product with the pen tip of the oil-based marking pen. Has been.

JP 2006-266981 A

  The defect marking apparatus described in Patent Document 1 performs marking by bringing a pen tip into contact with an object to be marked. Therefore, some objects may be damaged by contact with the pen tip. In addition, since the defect marking apparatus described in Patent Document 1 uses a sheet-like product as an object to be detected, if a defect occurs, disposal may be more appropriate than repair. In the case of an expensive product such as a mold, the defective portion is usually repaired and used. Therefore, a marking method that does not scratch is desired.

  An object of the present invention is to provide a defect marking method, a defect marking apparatus, and a defect detection system for an anti-glare processing mold that can perform marking with good visibility without damaging an object.

  The present invention relates to a defect marking method for marking an object having a defect using a spray gun for ejecting ink droplets and a mask for shielding a part of the ink droplets ejected from the spray gun. An arrangement step in which the gun, the mask, and the object are arranged in this order without contacting each other, and a marking step in which the ink droplets ejected from the spray gun are applied to the object through the mask to perform marking. A defect marking method is provided.

  In the defect marking method, the mask preferably shields ink droplets in a front region centered on a front surface of the spray gun and allows at least a part of ink droplets outside the front region to pass through. In the arrangement step, the object is arranged so that the defect corresponds to the front area. The object is preferably an anti-glare mold.

  The present invention also includes a spray gun that ejects ink droplets and a mask that blocks a portion of the ink droplets ejected from the spray gun, and the spray gun and the mask do not come into contact with the object without touching the object. A defect marking apparatus for marking a defect is provided.

  In the defect marking apparatus, the mask preferably shields ink droplets in a front region centered on the front surface of the spray gun and allows at least a part of ink droplets outside the front region to pass through. Marking is performed by placing an object such that the defect corresponds to the frontal area. The object is preferably an anti-glare mold.

  Moreover, this invention provides the defect detection system of the metal mold | die for anti-glare processing provided with the detection apparatus which detects the defect of the said metal mold | die for anti-glare processing, and the said defect marking apparatus.

  According to the defect marking method, the defect marking device, and the defect detection system of the anti-glare processing mold according to the present invention, marking is performed on an object having a defect using a spray gun. Therefore, it is possible to prevent the scratch from being generated by the marking. Furthermore, since marking is performed by combining a spray gun and a mask, excellent marking with excellent visibility can be performed.

It is sectional drawing which shows a preferable example of the defect marking method of this invention. (A) It is a figure which shows a preferable example of the mask used with the method shown in FIG. 1, (b) It is a figure which shows typically the marking formed using the mask of (a). It is sectional drawing which shows the other preferable example of the defect marking method of this invention. (A) It is a figure which shows a preferable example of the mask used with the method shown in FIG. 3, (b) It is a figure which shows typically the marking formed using the mask of (a). It is a figure for demonstrating the confirmation method of the position corresponding to the front direction of a spray gun. It is a figure which shows a preferable example of the air circuit for the ink droplet discharge control in a spray gun. It is a figure which shows the other example of the mask used with the method shown in FIG. It is a figure which shows the other example of the mask used with the method shown in FIG. It is a schematic perspective view which shows a preferable example of the defect detection system of the metal mold | die for glare-proof processes of this invention. It is a figure which shows the photograph of the surface of the target object in which marking was given in Example 1. FIG. It is a figure which shows the photograph of the surface of the target object in which marking was given in Example 2. FIG.

<Defect marking method>
FIG. 1 is a cross-sectional view showing a preferred example of the defect marking method of the present invention. As shown in FIG. 1, the method of the present invention uses a marking device including a spray gun 101 that ejects ink droplets 105 and a mask 102 that shields a part of the ink droplets 105 ejected from the spray gun 101. In this method, marking is performed on the object 103 having the defective portion 104. The spray gun 101, the mask 102, and the object 103 are arranged in this order without contacting each other, and the spray gun 101 is discharged. And a marking step of marking defects by applying the ink droplets to the object 103 through the mask 102.

  In FIG. 1, the mask 102 has an opening that allows ink droplets to pass therethrough and a shielding portion that shields ink droplets. The mask 102 has an opening that allows ink droplets to pass through a front area centered on the front direction of the spray gun 101, and a peripheral area of the opening serves as a shield that blocks ink drops.

  The defective portion 104 of the object 103 corresponds to the shielding portion of the mask 102 and is located near the region corresponding to the opening portion of the mask 102. By adopting such an arrangement relationship, ink adhesion to the defective portion 104 is suppressed, and the defective portion 104 can be clearly shown.

  FIG. 2A is a view showing a preferred example of the configuration of the mask used in the defect marking method shown in FIG. The mask 102 shown in FIG. 2A has a triangular opening 106 at the center. The mask shown in FIG. 2A is used by being arranged so that the position where the broken lines intersect with the front direction of the spray gun 101 (hereinafter also in the masks shown in FIG. 4A, FIG. 7 and FIG. 8). The same). FIG. 2B is a diagram schematically showing the marking formed on the object 103 when marking is performed using the mask 102 shown in FIG. As shown in FIG. 2B, a marking 107 is formed so as to correspond to the opening 106 of the mask 102. Since there is an interval between the mask 102 and the object 103, the ink droplets that have passed through the opening of the mask 102 reach the object 103 in the direction of the arrow in FIG. Spread. Since the defect portion 104 on the object 103 is located above the region corresponding to the opening 106 of the mask 102, the positional relationship between the marking 107 on the object 103 and the defect portion 104 is as shown in FIG. ) As shown.

  FIG. 3 is a cross-sectional view showing another preferred example of the defect marking method of the present invention. As shown in FIG. 3, the defect marking method shown in FIG. 3 differs from the defect marking method shown in FIG. 1 in the configuration of the mask 102 and the positional relationship between the mask 102 and the defective portion 104.

  In FIG. 3, a mask 102 is formed with a shielding portion that shields ink droplets in a front area centered on the front of the spray gun 101, and a part of the peripheral area of the shielding portion serves as an opening that allows ink droplets to pass through. Yes. The defective portion 104 of the target object 103 is located in a shielding portion of the mask 102, that is, an area corresponding to the front area. With such an arrangement relationship, ink adhesion to the defective portion 104 is suppressed, and marking surrounding the defective portion 104 is also possible, and the defective portion 104 can be clearly indicated by the marking. In the method of the present invention, since there is a distance between the mask 102 and the target object 103, the shape of the marking on the target object 103 is a shape in which the shape of the opening of the mask 102 is diffused. The ink droplet diffusion direction is a direction away from the center as shown by an arrow in FIG. 3, and in the method shown in this embodiment, the defective portion 104 is at a position corresponding to the center of the mask 102, that is, the ink droplet diffusion direction. Therefore, it is possible to prevent ink from adhering to the defective portion 104. Note that the size of the shielding portion at the center of the mask 102 may be determined according to the size of the defective portion 104 on the object. That is, the shielding range is preferably determined to a size that can prevent ink from adhering to the defective portion 104 due to the marking.

  FIG. 4A is a view showing a preferred example of the configuration of the mask used in the defect marking method shown in FIG. The mask 102 shown in FIG. 4A has a circular shielding portion at the center portion, and has an annular opening 106 surrounding the same. FIG. 4B is a diagram schematically showing the marking formed on the object 103 when marking is performed using the mask 102 shown in FIG. As shown in FIG. 4B, a marking is formed so as to correspond to the opening portion 106 of the mask 102. Further, since there is a gap between the mask 102 and the object 103, the ink droplets that have passed through the opening of the mask 102 diffuse in the direction of the arrow in FIG. 4B before reaching the object 103. . Since the defective portion 104 on the target object 103 is located at the center of the mask 102, the positional relationship between the marking 107 on the target object 103 and the defective portion 104 is as shown in FIG.

  The position corresponding to the front direction of the spray gun 101 can be confirmed as follows. First, a mask having no opening is set at a position where the mask is installed. In this state, ink is ejected from the spray gun 101. FIG. 5 is a diagram showing how ink adheres to the mask. Since the ink adheres most at the position P1 corresponding to the front direction of the spray gun, the position where the ink adheres is the position corresponding to the front direction of the spray gun in the mask.

(Spray gun)
The spray gun 101 atomizes the ink by the discharged air flow, and transports the ink droplet 105 to the target object 103 on the air flow. The spray gun 101 is not particularly limited as long as the opening of the mask 102 is included in the ink drop sending angle range and the ink drop can be sent out through the opening of the mask 102. The spray gun 101 is preferably provided with an ink valve that can be opened and closed to control the ejection timing of the ink droplets. FIG. 6 is a diagram illustrating a preferred example of an air circuit that controls the timing of ejecting ink droplets in the spray gun 101. The air supplied from the air pressure source 113 is separated into ink valve operating air supplied to the piston that opens the ink valve and atomizing air that atomizes the ink, and is sent to the electromagnetic valves 112 and 110, respectively. The electromagnetic valve 112 controls the supply of ink valve operating air, and the electromagnetic valve 110 controls the supply of atomized air. The speed controller 111 adjusts the flow rate of the atomized air.

  The opening time of the electromagnetic valve 112 that controls the supply of ink valve operating air depends on the ink used and the piping length of the pneumatic circuit. The opening of the electromagnetic valve 110 that controls the supply of atomizing air may be continuous, may be opened when the ink valve is opened, and may be closed when the ink valve is closed. It is more preferable to operate so that the air supply and the ink valve opening are interlocked with each other because silence and a reduction in air consumption can be realized. When the supply of atomizing air is not continuous, it is preferable that the atomizing air is opened earlier than the ink valve is opened, and the atomizing air valve is closed later than the ink valve is closed. This suppresses ink dripping that occurs in the spray gun body.

  As the atomizing air flow rate increases, the ink droplets become finer, and as the atomizing air flow rate decreases, the ink droplets increase. Appropriate ink drop sizes exist to clarify the marking outline. Therefore, it is preferable to have a mechanism for adjusting the flow rate of atomizing air, such as the speed controller 111, so that the ink droplet size can be adjusted to an appropriate size.

  As the solenoid valves 112 and 110, any solenoid valve having three or more ports for residual pressure processing can be preferably used. As such a solenoid valve, for example, model MDSYS-A sold by MISUMI Corporation can be used. MDSYS-A is a 5-port solenoid valve, but unnecessary ports can be closed and used. As the speed controller 111, for example, a model SPJYS4 sold by MISUMI Corporation can be used.

  As a spray gun provided with the ink valve which can be opened and closed as mentioned above, for example, the spray gun ST series manufactured by Fuso Seiki Co., Ltd. can be mentioned. Among these, the ST6 series capable of independently adjusting the atomizing air pressure and the ink valve opening / closing air pressure can be particularly preferably used. When a spray gun ST6SK manufactured by Fuso Seiki Co., Ltd. is used, the opening time of the electromagnetic valve that supplies air to the piston that opens the ink valve is preferably 100 ms or longer. By setting it to 100 ms or longer, sufficient operation tracking can be performed.

(mask)
As described above, the mask is located between the spray gun and the marking target, and is located in the course of the ink droplets generated by the spray gun flying toward the marking target, and removes a part of the ink droplets ejected from the spray gun. Shield. Examples of the form include a plate, a thin plate, and a film having an opening. By using a mask to block a part of the flying ink droplet, the outline of the marking becomes clearer and a defective portion can be clearly indicated. The size and shape of the opening of the mask can be appropriately selected depending on the size of the defect present in the marking object.

  In the defect marking method shown in FIG. 1, the mask 102 has an opening at a position corresponding to the front direction of the spray gun 101, and the defect portion 104 of the object 103 is outside the front area. FIGS. 7A and 7B show an example of a mask used in such a form, which is different from the example shown in FIG.

  In the defect marking method shown in FIG. 3, the mask 102 has a shielding portion at a position corresponding to the front direction of the spray gun 101, and the defective portion 104 of the object 103 is in the front area. FIGS. 8A to 8F show an example of the mask used in such a form, which is different from the example shown in FIG. 4A.

(ink)
As the ink to be supplied to the spray gun 101, an appropriate ink may be selected according to the marking object. When the marking object is a metal, for example, Aero Ink # 245, Aero Ink # 1250, etc. sold by Union Corporation can be preferably used. Inks are roughly classified into dye-based inks and pigment-based inks, and dye-based inks are more preferable in the method of the present invention. This is because in the case of pigment-based ink, precipitation of the coloring material in the ink piping may occur.

(Object)
The marking object has an undesirable defect to be identified. Examples of the object include a plate made of a material such as metal, resin, and glass, a film, a cylinder, and a cylinder. Examples of the defects include voids, scratches, dents, and attached foreign matter. The size of the defect is not particularly limited, but is within a range of, for example, a diameter of about 40 μm to 3 mm. By the defect marking method of the present invention, it is possible to carry out marking for clearly indicating the defective portion existing on the surface. The method of the present invention is particularly useful in marking objects that may be damaged by contact. As such an object, for example, a mold for molding a large-area optical component is exemplified. Among them, it is particularly effective to perform marking according to the method of the present invention because the anti-glare mold for optical film molding has a high risk of its characteristics being impaired by contact of the marking mechanism.

<Defect detection system for anti-glare mold>
FIG. 9 is a schematic perspective view showing a preferred example of a defect detection system for an anti-glare treatment mold according to the present invention. The defect detection system shown in FIG. 9 is a system for detecting and marking defects in an anti-glare processing mold, and a mold 205 to be inspected and chucking posts 203 and 204 for fixing the mold 205. An inspection head 206 for acquiring an image of a partial region of the surface of the mold 205 to be inspected, a marking unit 208 for marking the surface of the mold 205 in a non-contact manner, and the inspection head 206 and the marking First moving means 207 and second moving means 202 for moving the position of the unit 208 on the surface of the mold 205 are provided. Further, a control unit 201 for controlling the inspection head 206, the marking unit 208, the first moving unit 207, and the second moving unit 202 is provided.

  The first moving means 207 is a moving means for moving the inspection head 206 and the marking unit 208 in the direction of arrow A with respect to the mold 205 while maintaining the relative positional relationship between them. The second moving unit 202 is a moving unit that moves or rotates the mold 205 itself that is an inspection target. The chucking post 204 is movable and moves in the direction of arrow B according to the size of the mold 205. The marking unit 208 includes the spray gun and the mask shown in FIGS.

  The inspection head 206 includes an area image sensor or a linear image sensor, for example, and images the state of the mold surface. The control unit 201 has means for performing appropriate image processing on the obtained image, and can automatically detect a protrusion-like defect or a dent-like defect on the surface of the anti-glare processing mold. A defect detection apparatus is configured by 201. As an area image sensor, for example, CV-H500C, CV-H500M, CV-H200C, CV-H200M, CV-H100C, CV-H100M manufactured by Keyence Corporation, or FZ-SC5M, FZ- manufactured by OMRON Corporation. S5M, FZ-SC2M, FZ-S2M and the like are exemplified. Examples of the linear image sensor include a CCD linear image sensor manufactured by Toshiba Corporation, a TCD series, and a color line sensor TLC-7500CLD manufactured by Takenaka System Equipment Co., Ltd.

  These sensors are generally used in combination with a lens. Various lenses can be selected from the focal length, magnification, and the like. For example, as a lens sold by Keyence Corporation, CA-LH series (focal length 8 mm, 16 mm, 25 mm, 50 mm), CA-LM series adopting a telecentric optical system (optical magnification × 0.5 to × 1. 0, x2, x4, x6, x8) and the like can be used.

  By applying various image filters to the obtained image, noise reduction, enhancement of brightness change, or correction of nonuniform illumination state may be performed. Examples of the various filters include a shading correction filter, a contrast correction filter, a brightness correction filter, an intermediate value filter, and a blur filter. Each filtering process can be achieved by various known algorithms.

  The hardware for performing image filter processing is not particularly limited. For example, it may be realized by using a general-purpose computer such as a personal computer (also called a personal computer or a PC), or by using a dedicated image processing device. Also good. In addition, any device that can handle image data can be used without particular limitation. Examples of the dedicated image processing apparatus include hardware designed exclusively for CV-5000 series and CV-3000 series manufactured by Keyence Corporation, ZFX series and FZ3 series manufactured by OMRON Corporation.

  Examples of the first moving unit 207 include a linear actuator that is a linear motion mechanism, and a combination of this with a stepping motor, a servo motor, or a DC motor (for example, a servo linear actuator).

  As the second moving means 202, various driving means such as a stepping motor, a servo motor, and a DC motor can be used. In particular, a stepping motor can be preferably used from the viewpoint of controllability of the movement amount. Various gears can be further combined depending on the accuracy and torque required. Examples of stepping motors include AS series and AR series, and examples of servo motors include NX series (both manufactured by Oriental Motor Co., Ltd.), and products in combination with gears can be obtained. Examples of the linear actuator include ESR series, EZSII series, and EZX series (all manufactured by Oriental Motor Co., Ltd.). These motors are general-purpose products, and similar products can be obtained from various companies.

  A method for detecting and marking defects using the defect detection system shown in FIG. 9 will be described. The inspection head 206 and the marking unit 208 are moved by the first moving means 207, or the mold 205 is moved by the second moving means 202, and images of the respective positions on the surface of the mold 205 are sequentially acquired by the inspection head 206. The acquired image data is sent to the control unit 201, and the control unit 201 analyzes the image data to detect a defective portion on the surface of the mold 205. When a defective portion on the surface of the mold 205 is detected, the marking unit 208 is controlled to mark the defective portion. The method for marking the defective portion can be performed by the above-described defect marking method according to the present invention.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

<Example 1>
The marking object was an anti-glare mold with chrome plating. Aero ink “# 245 (blue)” (manufactured by Union Corporation) was introduced into the ink inlet of the spray gun “ST6SK” (manufactured by Fuso Seiki Co., Ltd.). Air of 0.5 MPa was supplied to the piston for driving the ink valve of the spray gun through a solenoid valve “MDSYS-A” (sold by MISUMI Corporation). In addition, atomized air was supplied to the spray gun via a solenoid valve “MDSYS-A” (sold from MISUMI Corporation) and a speed controller “SPJYS4” (sold from MISUMI Corporation). The solenoid valve was controlled by a personal computer using a USB digital input / output “DIO-8 / 8B-UBT” (manufactured by Y2 Co., Ltd.) via a terminal “SSR G3S4-D DC24” (manufactured by OMRON Corporation).

  First, the spray valve ink valve opening adjustment dial and the atomizing air flow rate were adjusted so that an appropriate amount of ink droplets were ejected. The atomizing air flow rate was finely adjusted with a speed controller. The ink valve opening time was then determined to control the amount of ink deposited on the marking object. In this embodiment, appropriate marking can be realized by opening the solenoid valve for supplying the ink valve opening air for 400 ms. The supply of atomizing air is interlocked with the operation of the ink valve, and the electromagnetic valve that supplies atomizing air is turned ON 100 ms before the ink valve operating electromagnetic valve is turned ON, and 200 ms after the ink valve is closed. The solenoid valve connected to the atomizing air side was turned off. These time controls were realized by creating a program for controlling the solenoid valve from a personal computer via USB digital input / output.

  The mask was placed at a position 35 mm away from the spray gun outlet. The object was placed at a position 50 mm away from the spray gun outlet, with the defective portion corresponding to the front of the spray gun. As the mask, a polypropylene film having a thickness of 200 μm provided with an opening was used. The shape of the opening was the shape shown in FIG. As for the size of the circular intermittent annular opening shown in FIG. 8C, the inner diameter was 3 mm and the outer diameter was 5 mm.

  With the configuration and method described above, good marking with excellent visibility was possible without the mask and spray gun coming into contact with the target mold. FIG. 10 shows a photograph of the surface of an object that has been marked in Example 1. In Example 1, marking was performed by the method shown in FIG. 3 assuming that the position indicated by the point P2 in FIG. Although the marking diffuses in the direction indicated by the arrow in FIG. 10 (outside), the vicinity of the point P2 is not contaminated with ink, and a clear marking is provided around this.

<Example 2>
Marking was performed in the same manner as in Example 1 except that a mask having a different opening shape was used and the object was placed at a position 40 mm away from the spray gun outlet. The shape of the opening of the mask was the shape shown in FIG. The size of the triangular opening shown in FIG. 2A is about 3 mm in height.

  With the above configuration and method, good marking was possible without the mask and spray gun coming into contact with the target mold. FIG. 11 shows a photograph of the surface of an object that has been marked in Example 2. Although the marking according to Example 2 was more deformed than the marking according to Example 1, good marking was possible.

  DESCRIPTION OF SYMBOLS 101 Spray gun, 102 Mask, 103 Target object, 104 Defect part, 105 Ink drop, 106 Opening part, 107 Marking, 110, 112 Solenoid valve, 111 Speed controller, 113 Air pressure source, 201 Control unit, 202 2nd moving means , 203,204 Chucking post, 205 mold, 206 inspection head, 207 first moving means, 208 marking unit.

Claims (7)

A defect marking method for marking an object having defects using a spray gun for ejecting ink droplets and a mask for shielding a part of the ink droplets ejected from the spray gun,
An arrangement step in which the spray gun, the mask, and the object are arranged without contacting each other in this order;
And a marking step of performing marking by applying ink droplets discharged from the spray gun onto the object through the mask. The mask shields ink droplets in a front region centered on the front of the spray gun, and passes at least part of ink droplets outside the front region;
The defect marking method according to claim 1, wherein in the placement step, the object is placed so that the defect corresponds to the front area.   The defect marking method according to claim 1, wherein the object is an anti-glare mold. A spray gun for ejecting ink droplets, and a mask for shielding a part of the ink droplets ejected from the spray gun,
A defect marking device for marking defects on the object without the spray gun and the mask coming into contact with the object. The mask shields ink droplets in a front region centered on the front of the spray gun, and passes at least part of ink droplets outside the front region;
The defect marking device according to claim 4, wherein marking is performed by arranging the object such that the defect corresponds to the front area.   The defect marking device according to claim 4 or 5, wherein the object is a mold for anti-glare treatment. A detection device for detecting defects in the mold for anti-glare treatment;
A defect detection system for a mold for anti-glare treatment, comprising the defect marking device according to claim 6.