WO2018037552A1 - Machine de sérigraphie - Google Patents

Machine de sérigraphie Download PDF

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Publication number
WO2018037552A1
WO2018037552A1 PCT/JP2016/074965 JP2016074965W WO2018037552A1 WO 2018037552 A1 WO2018037552 A1 WO 2018037552A1 JP 2016074965 W JP2016074965 W JP 2016074965W WO 2018037552 A1 WO2018037552 A1 WO 2018037552A1
Authority
WO
WIPO (PCT)
Prior art keywords
mask
substrate
screen printing
clamp
printing machine
Prior art date
Application number
PCT/JP2016/074965
Other languages
English (en)
Japanese (ja)
Inventor
横井良宗
Original Assignee
富士機械製造株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士機械製造株式会社 filed Critical 富士機械製造株式会社
Priority to PCT/JP2016/074965 priority Critical patent/WO2018037552A1/fr
Priority to JP2018536021A priority patent/JP6810747B2/ja
Publication of WO2018037552A1 publication Critical patent/WO2018037552A1/fr

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F15/00Screen printers
    • B41F15/08Machines
    • B41F15/12Machines with auxiliary equipment, e.g. for drying printed articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F15/00Screen printers
    • B41F15/14Details
    • B41F15/16Printing tables
    • B41F15/18Supports for workpieces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F15/00Screen printers
    • B41F15/14Details
    • B41F15/16Printing tables
    • B41F15/18Supports for workpieces
    • B41F15/26Supports for workpieces for articles with flat surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F15/00Screen printers
    • B41F15/14Details
    • B41F15/34Screens, Frames; Holders therefor
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/10Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/12Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns

Definitions

  • the present invention relates to a screen printing machine that prevents interference between members.
  • a mask having a printing pattern (printing through-hole) is held inside the machine body, a substrate is conveyed by a substrate conveying device, and screen printing with cream solder is performed on the substrate.
  • a substrate holding device for holding the transferred substrate and positioning it at the printing location
  • a mask holding device for positioning and holding the mask
  • a squeegee device for spreading cream solder from the upper surface is provided.
  • Patent Document 1 discloses a configuration in which a distance between mask support bases that hold both ends of a mask can be adjusted in accordance with a size change with respect to a mask holding device.
  • the substrate holding device it has a pair of clamp pieces that hold the substrate directly from the width direction, and the clamp pieces are long or short according to the size of the substrate by attaching and detaching the joint pieces. The structure which can change is disclosed.
  • the clamp piece In the conventional screen printing machine, it is possible to easily change the length of the clamp piece during the setup change. However, in the setup change performed by the operator, the clamp piece is switched to the short type despite the fact that the mask support base is narrowed due to the reduced mask size. It is thought that it has been left. This point is more likely to occur if the mask holding device is a screen printing machine having a mechanism for automatically adjusting the distance between the mask support bases. If the screen printing machine is operated with the long clamp piece attached even though the mask holding interval has been reduced, interference between the mask support and the clamp piece will occur. There is a possibility of causing damage, or the adjustment of each device is out of order, and time and extra labor are required for readjustment.
  • an object of the present invention is to provide a screen printing machine that performs interference determination between members in order to solve such a problem.
  • a screen printing machine includes a squeegee device that pushes cream solder into the print pattern with respect to a mask on which a print pattern including a plurality of through holes is formed, and a pair of gaps that can be adjusted in the board conveyance direction
  • a mask holding device that holds a mask with a mask receiving member, and a lifting mechanism that holds the substrate with a pair of substrate holding portions arranged in a direction perpendicular to the substrate transport direction and positions the substrate with respect to the mask from below.
  • the clamp member having a predetermined length when a clamp member having a predetermined length among the clamp members having different lengths in the substrate holding portion is attached to the base portion, the clamp member having a predetermined length is controlled by the control device based on the imaging information from the imaging device. Therefore, even if there is an error in the attachment of the clamp member, it is possible to perform processing that prevents the interference based on the determination result.
  • FIG. 1 is a perspective view showing a screen printing machine according to the present embodiment, and shows a state in which an upper cover is opened.
  • FIG. 2 is a side view schematically showing the inside of the screen printing machine.
  • This screen printing machine 1 prints cream solder on a substrate, and constitutes a circuit board production line together with, for example, an inspection machine for inspecting a printing state and a component mounting machine for mounting electronic components on a substrate.
  • the substrate is transported under a mask installed in the machine, and cream solder is applied to the lower substrate through a printing pattern (through hole) from the upper surface of the mask. Therefore, a pair of mask holders 2 arranged in the machine body width direction are provided on the upper side of the screen printing machine 1 so as to hold a mask fixed to the mask frame.
  • a squeegee device 3 is installed on the further upper side of the mask holder 2 and is attached so as to be movable in the longitudinal direction of the machine body.
  • the front and rear direction of the screen printing machine 1 is described as the Y-axis direction
  • the body width direction (the conveyance direction of the substrate 10) is the X-axis direction
  • the body height direction is the Z-axis direction.
  • a substrate table 5 is provided below the mask holder 2 to convey the substrate and hold the substrate at a predetermined position.
  • the substrate table 5 includes a substrate transfer device that loads and unloads the substrate in the body width direction, a clamp device that clamps the substrate in the longitudinal direction of the body, and a backup device that moves the substrate up and down to the clamp position.
  • FIG. 3 is a simplified internal configuration diagram of the screen printing machine centered on such a substrate table 5.
  • the entire screen printing machine 1 is covered with a body cover 4 (see FIG. 1).
  • Conveying ports 601 are formed on both sides in the width direction of the machine body cover 4 so that the substrate 10 that moves from the upstream side to the downstream side of the production line is loaded and unloaded by the substrate conveying device 11 through the conveying port 601. It has become.
  • the substrate transfer device 11 is assembled to the substrate table 5 and is constituted by a pair of conveyor belts 21 that support both sides of the substrate 10.
  • a substrate transport device 11 for transporting the substrate 10 and a clamp device 12 for holding the transported substrate 10 are assembled to the lifting device 13.
  • the lifting device 13 includes a lifting platform 24 that slides along a vertical guide rail 23, and the lifting platform 24 is connected to a lifting motor 26 via a ball screw mechanism 25.
  • a substrate transfer device 11, a clamp device 12, and the like are mounted on the lift 24 via a support 27.
  • a pair of mask supports 31 are provided on the support base 27 in the longitudinal direction of the machine body (Y-axis direction), and the clamp device 12 is disposed therebetween.
  • Each of the pair of mask supports 31 positioned in the longitudinal direction of the machine body includes a portal leg 311 in the machine body width direction (X-axis direction), and a mask support plate 312 to which the mask 20 contacts is fixed on the upper surface.
  • One mask support 31 (on the right side of the drawing) includes a ball screw mechanism in which a fixing nut inside the leg 311 and one screw shaft 32 are screwed together. Therefore, the distance from the other mask support 31 can be adjusted by controlling the drive motor that rotates the screw shaft 32.
  • the clamp device 12 has a pair of side frames 35 arranged in the longitudinal direction of the machine body that is orthogonal to the carrying direction of the substrate 10 with respect to the support base 33, and one side frame 35 (right side of the drawing) has an internal fixing nut and a screw shaft. 37 is screwed to form a ball screw mechanism, and the distance from the other side frame 35 can be adjusted by rotation of the clamping motor with respect to the screw shaft 37. A clamp portion 38 is formed at the upper end of the side frame 35 so that the substrate 10 can be gripped by adjusting the distance between them. Then, the substrate transport device 11 is assembled to the side frame 35, and the substrate 10 transported by the conveyor belt 21 is held by a pair of clamp portions 38.
  • a backup device 14 is provided between the pair of side frames 35.
  • a plurality of backup pins 42 are attached to the backup table 41, and the backup pins 42 are arranged so as to avoid electronic components mounted on the substrate 10. And it is supported with respect to the support stand 33 of the clamp apparatus 12 via the ball screw mechanism which converts the rotation output of the raising / lowering motor 43 into a raising / lowering motion.
  • a drive motor 44 is fixed to the support base 33, and the backup table 41 is supported via a ball screw mechanism that converts the rotation output into a lifting motion.
  • the squeegee device 3 is provided on the set mask 20.
  • the squeegee device 3 is applied to the substrate 10 located under the mask 20 by pushing cream solder into the printing pattern of the mask 20 while rolling.
  • the squeegee device 3 is mounted on the traveling platform 45 in a state in which a pair of squeegee heads 301 and 302 having a squeegee can be moved up and down by a cylinder.
  • the traveling platform 45 is slidably assembled with respect to a guide rod 46 installed in the longitudinal direction of the machine body and can move linearly in the horizontal direction.
  • a screw shaft 47 parallel to the guide rod 46 is installed in the screen printing machine 1 in a rotatable state, and is rotated by a drive motor.
  • a ball screw mechanism is constituted by the fixing nut inside the carriage 45 and the screw shaft 47.
  • a camera 6 for imaging a substrate mark or a mask mark attached to the substrate 10 or the mask 20 is provided at a height between the mask holder 2 and the substrate table 5.
  • the camera 6 is attached to a guide rail 51 in the longitudinal direction of the machine body via a Y-axis slider 48, and the guide rail 51 on which the camera 6 is mounted is attached to two guide rails 52 in the machine body width direction on the X-axis slider. 53 is installed. Therefore, the camera 6 is configured to be movable on the XY plane by the Y-axis slider 48 and the X-axis slider 52.
  • the screen printing machine 1 is equipped with a control device 7 for controlling the overall drive, and the drive control set for the drive unit of each device is performed.
  • the control device 7 includes a control unit including a computer and an input / output unit, a plurality of drive circuits, and the like.
  • the computer includes a CPU, a ROM, a RAM, and a bus for connecting them, an image processing computer is connected to the input / output unit, and a lifting motor 26 and the like are connected via a drive circuit.
  • the substrate 10 is first carried by the conveyor belt 21 between the pair of side frames 35. Then, the backup table 41 is lifted by driving the lifting / lowering motor 44, and the substrate 10 is lifted from the conveyor belt 11 so as to be pushed up by the backup pins 42. Further, when the screw shaft 37 is rotated, one side frame 35 moves, and the substrate 10 is sandwiched and held by the clamp portions 38 of the pair of side frames 35.
  • the entire clamping device 12 holding the substrate 10 is raised, the positions of the clamp unit 38 and the substrate 10 are adjusted to the height of the mask support plate 312, and the height of the upper surface is increased. It is in an aligned state. Thereafter, the lifting platform 24 is raised by driving the lifting motor 26 and stops at a printing position where the upper surface of the mask support plate 312, the clamp portion 38, and the substrate 10 lightly contacts the lower surface of the mask 20.
  • the supplied cream solder is rolled on the mask 20 by the squeegee device 3 and pushed into the printing pattern. Thereby, the cream solder is printed on the substrate 10 located under the mask 20 through the through hole of the print pattern.
  • the mask 20 is a very thin rectangular metal plate on which a printing pattern is formed, and the outer edge portion is fixed by a square mask frame to maintain a flat state.
  • the pair of mask holders 2 are arranged at predetermined intervals in the transport direction of the substrate 10 so as to hold two sides of the mask frame.
  • Such a mask holder 2 has a position adjusting function capable of moving in the machine body width direction, and has a configuration capable of adjusting the interval according to the size of the mask 20.
  • 4 and 5 are perspective views showing the mask holder 2.
  • FIG. FIG. 5 shows a state where a mask 20L is held
  • FIG. 5 shows a state where a small size mask 20S is held.
  • the pair of mask holders 2 positioned in the body width direction (X-axis direction) are symmetrically assembled to the gate-shaped legs 55, respectively.
  • guide blocks 56 are fixed at two places on the upper surface of the leg 55, rod-like sliders 57 are slidably assembled, and a mask receiver 58 is fixed to the two sliders 57.
  • the mask holder 2 of the screen printing machine 1 can adjust the distance between the pair of mask receivers 58 according to the size of the mask 20 by the operator.
  • the slider 57 is provided with a scale, and the mask receiver 58 can be moved in accordance with the size of each of the masks 20L, 20M, and 20S by alignment with the guide block 56 as a reference.
  • the mask receiver 58 is an L-shaped plate-like member, and is arranged so that horizontal portions on which the mask frame 202 is placed face each other.
  • two air cylinders 59 are attached to each mask receiver 58, and the mask frame 202 is held by the mask receiver 58 by pressing a piston rod that extends downward.
  • a base plate 61 having positioning protrusions 611 formed in the longitudinal direction is fixed to the side frame 35 of the clamp device 12, and a plurality of clamp pieces 62 prepared on the base plate 61 are detachable.
  • three clamp pieces 62 are prepared: a long clamp piece 62L, a medium clamp piece 62M, and a short clamp piece 62S.
  • Such a clamp piece 62 is fixed to the base plate 61 in place by bolts.
  • FIG. 7 is a view showing the positional relationship between the clamp pieces 62L, 62M, and 62S attached to the base plate 61.
  • the length direction of the clamp piece 62 attached to the clamp device 12 is the machine body width direction (X-axis direction) as shown in FIG. Therefore, when the distance between the pair of mask receivers 58 arranged in the width direction of the machine body is shortened by a certain amount or more, the mask receiver 58 overlaps with the end of the long clamp piece 62L. Interference between the receiver 58 and the clamp piece 62L occurs.
  • the clamp piece 62L is not replaced with the clamp piece 62M or 62S even though the position of the pair of mask receivers 58 is changed as shown in FIGS. Is the case.
  • the end of the clamp piece 62 ⁇ / b> L collides with the lower surface of the mask receiver 58.
  • the clamp piece 62 is correctly replaced, the substrate 10 can be brought into contact with the mask 20 without interference. Therefore, in the present embodiment, a configuration is adopted for preventing the mask receiver 58 and the clamp piece 62 from interfering with each other by eliminating replacement mistakes by the operator.
  • recognition marks 621, 622, and 623 having different shapes are attached to the clamp pieces 62L, 62M, and 62S constituting the clamp portion 38, respectively.
  • square, round, and rhombus marks are added in order from the long clamp piece 62L.
  • the recognition marks 621, 622, and 623 are picked up by the camera 6 and subjected to image processing.
  • the mark is not particularly limited in shape, as long as the length of the clamp piece can be identified.
  • an arm 65 parallel to the leg body 55 is fixed to the mask holder 2 in the X-axis direction, and a recognition mark is attached to the lower end surface thereof.
  • 66 is mounted vertically.
  • a recognition mark on the lower end surface of the confirmation rod 66 is also captured by the camera 6 and subjected to image processing. However, since it is only necessary to recognize the presence or absence of the confirmation rod 66 from the imaging data of the camera 6, the recognition mark is not necessarily required.
  • a shielding plate 67 is fixed to the mask receiver 58 in a state parallel to the X-axis direction. The shielding plate 67 is configured to hide the confirmation rod 66 from the camera 6 when the mask receiver 58 moves to a position where there is a possibility of interference with the clamp piece 62L.
  • the control device 7 is provided with a size determination unit 701 in the ROM of the computer and stores a size determination program (see FIG. 3).
  • FIG. 8 is a diagram showing a flowchart of the size determination process by executing the size determination program.
  • the size determination process will be described.
  • the clamp piece 62 attached to the clamp device 12 is confirmed (S101). That is, for any of the clamp pieces 62L, 62M, and 62S attached to the clamp unit 38, the recognition mark 621, 62, or 623 is imaged by the camera 6, and the imaged data is subjected to image processing by the control device 7. Thus, it is confirmed which size of the clamp piece 62 is attached.
  • the clamp piece 62L is a long clamp piece 62L (S102). If the clamp piece 62L is not a clamp piece 62L but a medium or short clamp piece 62M or 62S. (S102: NO), this size determination process ends. This is because, in the present embodiment, the determination with respect to the interference with the mask receiver 58 is made only when the clamp piece 62L with the possibility of interference is attached. Therefore, in the case of the mask receiver 58, the clamp pieces 62M and 62S having a short size that cannot cause interference are transferred to the next driving process in the screen printer 1.
  • the position of the pair of mask receivers 58 is confirmed (S103). That is, the camera 6 moves to the imaging position with respect to the confirmation rod 66 at the fixed position, and the imaging data of the camera 6 imaged there is sent to the control device 7 for image processing. Then, the position of the mask receiver 58 is confirmed depending on whether or not the recognition mark of the confirmation rod 66 has been imaged (S104). When the recognition mark can be confirmed (S104: YES), it can be seen that the pair of mask receivers 58 are largely separated as shown in FIG. At this time, since the interference between the mask receiver 58 and the clamp piece 62L does not occur, the size determination process ends.
  • the interference between the mask receiver 58 and the clamp piece 62L is confirmed by the size determination process, so that the interference can be prevented in advance.
  • the drive of the screen printing machine 1 is stopped by the warning process (S105)
  • the operator can confirm the replacement mistake of the clamp piece 62 by the blinking display of the signal signal tower 8 or the like.
  • the above-described effects can be achieved at low cost by performing the size determination process without significantly changing or adding the configuration to the conventional screen printing machine. Further, in the size determination process of the present embodiment, the position of the mask receiver 58 is confirmed only in the case of the clamp piece 62L with the possibility of interference, so that the processing time is shortened.
  • the position of the mask receiver 58 is determined by imaging the confirmation rod 66 at a fixed position, it is possible to simplify the determination process required for interference determination.
  • a mechanism for searching the mask receiver mark attached to the mask receiver 58 and the mask mark attached to the mask 20 with the camera 6 is used as another method for grasping the position of the mask receiver 58.
  • the position of the mask receiver 58 may be accurately specified from the information.
  • the positions of the mask receiver mark and the mask mark are not always constant.
  • the confirmation rod 66 of the mask holder 2 is in a fixed position.
  • the confirmation rod 66 can recognize the position of the mask receiver 58 in a short time.
  • the camera 6 uses the mask reference mark (mask receiving mark). Since the position information of the encoder can be used when recognizing the mark (which may be the same or different from the position recognition mark), there is an advantage that the camera 6 can be moved to an appropriate mark reading position.
  • the length of the clamp piece 62 can be determined from the imaging data of the recognition marks 621, 622, and 623, but it is determined by imaging the edge positions of the clamp pieces 62L, 62M, and 62S. May be.
  • the clamp pieces 62M and 62S having a short size cannot be interfered with the mask receiver 58. Therefore, the confirmation rod 66 is discriminated by only one, but the clamp 62M also interferes. If there is, it is possible to attach the two confirmation rods 66 so that the position of the mask receiver 58 in the middle can also be confirmed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)
  • Screen Printers (AREA)

Abstract

L'invention concerne une machine de sérigraphie (1) équipée : d'un dispositif de raclette (3) qui pousse la crème à braser dans un motif d'impression comprenant une pluralité de trous traversants par rapport à un masque (20) sur lequel le motif d'impression est formé ; d'un dispositif de maintien de masque (2) qui maintient le masque (20) à l'aide d'une paire d'éléments de réception de masque (58) apte à ajuster un intervalle entre ces derniers dans une direction de transport de substrat ; d'un dispositif de maintien de substrat (5) qui maintient un substrat (10) à l'aide d'une paire de parties de maintien de substrat (38) agencée dans une direction orthogonale à la direction de transport de substrat et qui possède un mécanisme de levage (13) positionnant le substrat par rapport au masque par le dessous ; d'un dispositif d'imagerie (6) qui est mobile ; et d'un dispositif de commande (7) qui commande l'entraînement des dispositifs. Dans chaque partie de maintien de substrat (38), chacun des éléments de serrage (62) possédant différentes longueurs correspondant à des tailles de substrat peut être fixé à/détaché d'une partie base (61), et le dispositif de commande (7) détermine une interférence entre la partie de réception de masque (58) et la partie de maintien de substrat (38) sur la base d'informations d'imagerie provenant du dispositif d'imagerie (6).
PCT/JP2016/074965 2016-08-26 2016-08-26 Machine de sérigraphie WO2018037552A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2016/074965 WO2018037552A1 (fr) 2016-08-26 2016-08-26 Machine de sérigraphie
JP2018536021A JP6810747B2 (ja) 2016-08-26 2016-08-26 スクリーン印刷機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/074965 WO2018037552A1 (fr) 2016-08-26 2016-08-26 Machine de sérigraphie

Publications (1)

Publication Number Publication Date
WO2018037552A1 true WO2018037552A1 (fr) 2018-03-01

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Application Number Title Priority Date Filing Date
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JP (1) JP6810747B2 (fr)
WO (1) WO2018037552A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62123793A (ja) * 1985-11-22 1987-06-05 ソニー株式会社 回路基板の位置決め装置
JP2006007625A (ja) * 2004-06-28 2006-01-12 Matsushita Electric Ind Co Ltd スクリーン印刷装置およびスクリーン印刷方法
JP2007190714A (ja) * 2006-01-17 2007-08-02 Yamaha Motor Co Ltd スクリーン印刷装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62123793A (ja) * 1985-11-22 1987-06-05 ソニー株式会社 回路基板の位置決め装置
JP2006007625A (ja) * 2004-06-28 2006-01-12 Matsushita Electric Ind Co Ltd スクリーン印刷装置およびスクリーン印刷方法
JP2007190714A (ja) * 2006-01-17 2007-08-02 Yamaha Motor Co Ltd スクリーン印刷装置

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JPWO2018037552A1 (ja) 2019-06-20
JP6810747B2 (ja) 2021-01-06

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