WO2013069506A1

WO2013069506A1 - Printing machine

Info

Publication number: WO2013069506A1
Application number: PCT/JP2012/078037
Authority: WO
Inventors: 広己鈴木; 健志光村
Original assignee: 富士機械製造株式会社
Priority date: 2011-11-09
Filing date: 2012-10-30
Publication date: 2013-05-16
Also published as: JP2013102063A; JP5954959B2

Abstract

In addition to providing a mask ID code (24) representing identification information (called "mask ID" below) for a printing mask (13) on the lower surface of the printing mask (13), a printing mask-specific information database, which is mask IDs associated in database form with specific information for multiple printing masks (13) that can be used in a printing machine, is stored in a storage device. With each exchange of printing masks (13), the mask ID code (24) on the lower surface of the printing mask (13) is photographed with a camera (21), the image taken is image-processed to identify the mask ID, the printing mask-specific information database of the storage device is searched, the specific information for the printing mask (13) corresponding to the mask ID is read-in, and a prescribed processing is performed on the basis of the specific information for said printing mask (13). The prescribed processing here is, for example, correcting the printing position according to the specific information to prevent deviation of printing when a correction amount for the printing position is contained in the specific information for the printing mask (13).

Description

Printer

The present invention relates to a printing machine that forms a printing pattern on a circuit board by covering the circuit board with a printing mask (screen mask).

In a printing machine that forms a print pattern on a circuit board, as described in Patent Document 1 (Japanese Patent Laid-Open No. 2011-151078), in order to manage the print mask, identification information (hereinafter referred to as “print mask”). There is a mask ID display unit for displaying a mask ID) provided on a printing mask, and the mask ID is read by an ID reading unit provided on a printing press.

JP 2011-151078 A

By the way, it is necessary to replace the printing mask used in the printing machine according to the pattern shape to be printed or according to the number of times of printing. Even in the case of the printing mask printing the same pattern shape, the reference position mark ( There is a possibility that the position of the fiducial mark) is shifted, the tension of the printing mask is varied, or the position, shape, and size of the opening of the printing mask are varied. Therefore, if the variation for each print mask is not corrected, there is a possibility that a printing deviation or a printing defect may occur or an image processing error of the reference position mark may occur.

However, since the above-mentioned Patent Document 1 only manages the mask ID for each print mask, it cannot sufficiently cope with variations for each print mask. In order to cope with such variations for each print mask, it is necessary for an operator to manually input the data of the specific information of the print mask, which is troublesome, printing misalignment due to an input error, printing defect, reference position mark. Image processing errors may occur.

Therefore, a problem to be solved by the present invention is to provide a printing machine that can automatically cope with variations among printing masks.

In order to solve the above-described problems, the present invention provides a camera for setting a print mask on a circuit board and forming a print pattern on the circuit board, a camera for imaging an imaging target portion of the print mask, and the camera An image processing means for recognizing the imaging target region by processing the image picked up in step (1), and providing the print mask with a mask ID display unit for displaying the print mask identification information (hereinafter referred to as “mask ID”) in advance. In addition, unique information of a plurality of print masks that can be used in the printing press is stored in a storage unit in association with the mask ID, the mask ID display portion of the print mask is imaged by the camera, and the captured image is displayed. The image processing means recognizes the mask ID and recognizes the unique information of the plurality of print masks stored in the storage means by the image processing means. It is characterized in that to obtain the unique information corresponding to the mask ID.

In this configuration, the unique information of a plurality of print masks that can be used in the printing press is stored in the storage means in association with the mask ID, and image processing is performed from the unique information of the plurality of print masks stored in the storage means. Since the unique information corresponding to the mask ID recognized by the means is obtained, both the unique information of the print mask and the mask ID can be obtained, and the variation for each print mask can be automatically handled. It is possible to prevent printing misalignment, printing failure, image processing error of the reference position mark, and the like due to a conventional input error of unique information.

Alternatively, a mask information display unit for displaying the unique information of the print mask in a two-dimensional code or the like is provided in advance on the print mask, the mask information display unit of the print mask is imaged with a camera, and the captured image is image processing means The unique information of the print mask may be recognized by performing the above process. Even if it does in this way, the effect similar to the said Claim 1 can be acquired.

Here, the specific information of the printing mask includes the correction amount of the printing position, squeezing speed, squeezing distance, squeezing pressure, squeegee mask separation speed, mask separation distance, printing mask cleaning condition, printing mask thickness, mask The shape and size of the opening, the mask manufacturing date, the manufacturing company, the mask type, the management number, the number of printable times, and at least a part of information linked to these information may be included. If at least a part of this information is included in the unique information of the print mask, the variation for each print mask can be corrected appropriately, preventing printing misalignment and printing defects, and image processing errors of the reference position mark. It is possible to prevent, improve printing quality, and properly manage the cleaning time and replacement time of the printing mask.

FIG. 1 is an enlarged cross-sectional view for explaining the configuration of the main part of a printing press showing Embodiment 1 of the present invention. FIG. 2 is a block diagram showing the configuration of the control system of the printing press. FIG. 3 is a flowchart showing the flow of processing of the print mask management program.

Hereinafter, two Examples 1 and 2 that embody the mode for carrying out the present invention will be described.

First, a first embodiment of the present invention will be described with reference to FIGS.
The printing machine is provided with a conveyor 12 that conveys the circuit board 11, and a printing mask 13 (screen mask) is installed horizontally above the conveyor 12. The printing mask 13 is formed with an opening 14 having the same shape as a wiring pattern, a resistor pattern, an insulator pattern and the like to be screen-printed. A squeegee 15 is disposed above the print mask 13. When screen printing is performed, the circuit board 11 is raised (or the printing mask 13 is lowered), and the printing mask 13 is put on the circuit board 11, and the solder paste supplied onto the printing mask 13 Are spread out with a squeegee 15 and solder paste or the like is pushed out from the opening 14 of the printing mask 13 to screen-print a wiring pattern or the like on the circuit board 11. At this time, the squeegee 15 is moved by the squeegee moving device 17 (see FIG. 2).

The printing machine is provided with a camera 21 that captures an imaging target region such as a reference position mark on the circuit board 11 and a reference position mark on the print mask 13. The camera 21 is moved in the XY-axis direction by a camera moving device 22 (see FIG. 2), and images of both the circuit board 11 side and the print mask 13 side are taken on the lens side of the camera 21. A prism 23 is mounted. During operation of the printing machine, the camera 21 is moved between the circuit board 11 and the print mask 13 with the print mask 13 retracted above the circuit board 11 before screen printing. After imaging 13 reference position marks and the like, the camera 21 is connected to the circuit board 11.
The circuit board 11 is raised (or the print mask 13 is lowered), and screen printing is performed with the print mask 13 placed on the circuit board 11.

Further, a mask ID code 24 (mask ID display portion) indicating identification information (hereinafter referred to as “mask ID”) of the print mask 13 is provided on the lower surface of the print mask 13 at a position that does not interfere with screen printing. . The mask ID code 24 may be either a one-dimensional code or a two-dimensional code, and may be drawn on the lower surface of the print mask 13 with a laser or the like, or a code seal may be attached. A camera 21 is used as a reader for reading the mask ID code 24. Each time the print mask 13 is replaced, the mask ID code 24 on the lower surface of the print mask 13 is imaged by the camera 21 in the same manner as the image recognition operation of the reference position mark of the print mask 13 described above. The mask ID is recognized by processing by the control device 25 (image processing means) of the printing press.

On the other hand, the storage device 26 of the control device 25 (or storage means such as a network server accessible by the control device 25) is a database in which unique information of a plurality of print masks 13 usable in the printing press is associated with the mask ID. The converted print mask unique information database is stored. Here, the unique information of the print mask 13 includes, for example, at least a part of the following information.

(1) Correction amount of printing position (correction amount of X coordinate, Y coordinate, angle θ)
(2) Squeegee speed (moving speed of squeegee 15), squeegee distance (moving distance of squeegee 15)
(3) Squeezing pressure (pressing force of squeegee 15 against printing mask 13)
(4) Mask removal speed of the squeegee 15 (rising speed from the print mask 13 after printing), mask separation distance (rising distance from the print mask 13 after printing), and mask separation include both single acting and multi-stage. .
(5) Print mask 13 cleaning conditions (cleaning interval, cleaning speed, cleaning distance, one-way / reciprocation, solvent, suction)
(6) Print mask 13 thickness, opening 14 shape / size (7) Mask manufacturing date, manufacturer, mask type, control number (8) Number of prints allowed
(9) Link destination of this information (on the printer or on the network)

The control device 25 of the printing press repeatedly executes the print mask management program of FIG. 3 at a predetermined cycle during operation of the printing press, so that each time the print mask 13 is replaced, the unique information of the replaced print mask 13 Is acquired and a predetermined process is executed. Hereinafter, processing contents of the print mask management program of FIG. 3 will be described.

When the print mask management program of FIG. 3 is started, first, in step 101, the mask ID code 24 on the lower surface of the print mask 13 is imaged by the camera 21, and in the next step 102, the mask ID code 24 imaged by the camera 21 is captured. Image processing is performed to recognize the mask ID.

Thereafter, the process proceeds to step 103, where it is determined whether or not the print mask 13 has been replaced. If the print mask 13 has not been replaced, the present program is terminated without performing the subsequent processing.

On the other hand, if it is determined in step 103 that the print mask 13 has been replaced, the process proceeds to step 104 where the print mask unique information database stored in the storage device 26 is searched and the mask recognized in step 102 is detected. The unique information of the print mask 13 corresponding to the ID is read.

Thereafter, the process proceeds to step 105, and a predetermined process is executed based on the read unique information of the print mask 13. Here, for example, when the specific information of the print mask 13 includes a correction amount of the print position, the predetermined process corrects the print position in accordance with the specific information to prevent printing misalignment.

Further, when the unique information of the printing mask 13 includes unique information (squeezing speed, squeezing distance, squeezing pressure, mask separating speed of the squeegee 15, mask separating distance, etc.) relating to adhesion at the time of plate alignment, The printing operation is corrected according to the unique information. This prevents printing defects caused by variations in adhesion during plate alignment due to variations in tension of the printing mask 13.

Also, when the printing mask 13 cleaning conditions are included in the unique information of the printing mask 13, the cleaning operation is executed under the cleaning conditions specified by the unique information. Further, if the unique information of the print mask 13 includes unique information (mask type or the like) related to luminance correction at the time of image processing of the reference position mark of the print mask 13, image processing of the reference position mark is performed according to the unique information. Correct the brightness of the hour. This prevents an image processing error of the reference position mark due to variations in the print mask 13.

If the unique information of the print mask 13 includes the thickness of the print mask 13 and the shape / size of the opening 14, the printing operation is corrected according to the unique information. Further, when the unique information of the print mask 13 includes the number of printable times of the print mask 13, the print mask 13 is replaced every time the number of prints exceeds the number of printable times specified by the unique information. Further, when the link information of the information is included in the unique information of the print mask 13, the unique information is acquired from the link destination server specified by the unique information.

Thereafter, the process proceeds to step 106 to determine whether or not the print mask is designated by the program. As a result, if it is confirmed that the print mask is designated by the program, the present program is terminated as it is. If it is determined that the print mask is not designated by the program, the process proceeds to step 107 and the control device 25 A warning is displayed on the monitor or a warning sound is generated to inform the operator that the print mask is not designated by the program.

According to the first embodiment described above, the mask ID code 24 in which the mask ID is recorded is provided on the lower surface of the print mask 13, and the unique information of the plurality of print masks 13 that can be used in the printing machine is stored in the storage device 26. Is stored as a database in association with the mask ID, the mask ID code 24 on the lower surface of the print mask 13 is captured by the camera 21, and the captured image is processed to recognize the mask ID. Since the print mask unique information database in the storage device 26 is searched and the unique information of the print mask 13 corresponding to the mask ID is read, both the unique information of the print mask 13 and the mask ID can be acquired. It is possible to automatically cope with variations for each printing mask 13, printing misalignment due to input error of conventional unique information, printing defect, reference level It can prevent image processing error or the like of the mark.

In the first embodiment, the mask ID code 24 is provided in the print mask 13, the print mask unique information database is stored in the storage device 26, the print mask unique information database in the storage device 26 is searched, and the print mask corresponding to the mask ID is stored. In the second embodiment of the present invention, a mask information display unit (not shown) for displaying the unique information of the print mask 13 on the lower surface of the print mask 13 with a two-dimensional code or the like. The mask information display part of the print mask 13 is imaged by the camera 21, and the captured image is processed by the storage device 26 (image processing means) so as to recognize the unique information of the print mask 13. The mask information display unit may record a mask ID in addition to the unique information similar to that in the first embodiment, or the mask information display unit and the mask ID code 24 (mask ID display unit) may be separately provided. It may be provided. Other matters are the same as those in the first embodiment.

In the second embodiment described above, the same effect as that of the first embodiment can be obtained.
In addition, according to the present invention, the unique information of the print mask recorded in the storage device or the mask information display unit may be changed as appropriate, or the mask ID code may be provided on the upper surface or both upper and lower surfaces. It may be counted and used as a maintenance tool, it may be determined whether or not the mask is specified by the program of the printing press, or an RFID may be provided on the mask and a reading device may be provided on the printing press side. Needless to say, various modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 11 ... Circuit board, 12 ... Conveyor, 13 ... Print mask, 14 ... Opening part, 15 ... Squeegee, 21 ... Camera, 23 ... Prism, 24 ... Mask ID code (mask ID display part), 25 ... Control apparatus (Image processing) Means), 26 ... Storage device (storage means)

Claims

In a printing machine that sets a printing mask on a circuit board and forms a printing pattern on the circuit board,
A camera for imaging an imaging target portion of the print mask;
Image processing means for processing the image captured by the camera and recognizing the imaging target part,
The print mask is provided with a mask ID display unit that displays identification information (hereinafter referred to as “mask ID”) of the print mask in advance, and unique information of a plurality of print masks that can be used in the printing press is associated with the mask ID. Memorize it in the memory means,
The mask ID display part of the printing mask is imaged by the camera, the captured image is processed by the image processing unit to recognize the mask ID, and the unique information of the plurality of printing masks stored in the storage unit A printing machine characterized in that unique information corresponding to a mask ID recognized by the image processing means is acquired from inside.
In a printing machine for setting a printing mask on a circuit board and forming a printing pattern on the circuit board,
A camera for imaging an imaging target portion of the print mask;
Image processing means for processing the image captured by the camera and recognizing the imaging target part,
In advance, a mask information display unit for displaying unique information of the print mask is provided on the print mask,
A printing machine, wherein the camera captures a mask information display section of the print mask, recognizes unique information of the print mask by processing the captured image by the image processing means.
The specific information of the print mask includes a print position correction amount, a squeezing speed, a squeezing distance, a squeezing pressure, a squeegee mask separation speed, a mask separation distance, a printing mask cleaning condition, a printing mask thickness, and a mask opening. The shape / size, mask manufacturing date, manufacturing company, mask type, control number, number of printable times, and at least part of information linked to these information are included in claim 1 or 2. The printing machine described.