JP2016112736A - Paste feeder, screen printer, paste feeding method, and screen printing method - Google Patents

Abstract

An object of the present invention is to provide a paste supply device, a screen printer, a paste supply method, and a screen printing method that can prevent the paste from dripping from a paste pot. A connecting portion 64 provided on an inner lid 62 of a paste pot 60 is connected to a pot holding portion 52, and the paste pot 60 is held by the pot holding portion 52 with a through hole 63 facing downward. Then, the bottom surface of the cylindrical member 61 is pushed by the paste extruding portion (the pressing cylinder 71, the extruding member 72, and the annular member 73), and the cylindrical member 61 is moved relative to the inner lid 62 of the paste pot 60 from the through hole 63. After the paste Pst is extruded, the bottom surface of the cylindrical member 61 is held by the suction force generated on the bottom surface (inner space 73R) of the cylindrical member 61 by the suction force generation mechanism, and the cylindrical member 61 is pulled up by the paste extrusion portion. . [Selection] Figure 11

Description

  The present invention relates to a paste supply apparatus, a screen printing machine, a paste supply method, and a screen printing method for supplying a paste onto a mask in a screen printing machine.

  Conventionally, as a paste supply device for supplying paste on a mask in a screen printing machine, one that directly pushes and supplies paste from a commercially available paste pot containing paste in a cylindrical container is known (for example, a patent) Reference 1). In this paste supply device, the paste pot is turned upside down so that the through hole provided in the inner lid of the container is held downward, and the paste is pushed out from the through hole by pushing down the bottom of the container with an extrusion member. It has become.

JP 2014-151507 A

  However, in the paste supply apparatus of the type that directly supplies the paste from the paste pot including Patent Document 1, even if the push-down of the extrusion member is stopped in order to stop the supply of the paste, the paste may hang down from the through hole. When the ink drops on the mask during printing, there is a problem that uneven printing may occur.

  Then, an object of this invention is to provide the paste supply apparatus, screen printer, paste supply method, and screen printing method which can prevent the dripping of the paste from a paste pot.

  The paste supply apparatus according to claim 1 includes a bottomed cylindrical member that contains paste, and an inner lid that is movably inserted into the cylindrical member and has a through hole formed in the center. A paste pot; a pot holding portion that is connected to a connecting portion provided in the inner lid to hold the paste pot in a posture in which the through hole faces downward; and the paste pot held in the pot holding portion. A paste extruding part for extruding paste from the through hole by moving the cylindrical member relative to an inner lid, and the cylindrical member of the paste pot held by the pot extruding part by the pot holding part The bottom surface of the cylindrical member is held by the suction force generated on the bottom surface of the cylindrical member by the suction force generation mechanism. The issuing unit pulling the tubular member.

  The screen printing machine according to claim 2, wherein the paste is supplied onto the mask that is in contact with the substrate, and the paste is extruded onto the mask that is in contact with the substrate. And a squeegee that slides on the mask supplied with the paste.

  According to a third aspect of the present invention, there is provided a paste supply method comprising: a bottomed cylindrical member that contains a paste; and an inner lid that is movably inserted into the cylindrical member and has a through-hole formed at the center. A pot holding step of connecting the connecting portion provided on the inner lid of the paste pot to the pot holding portion to hold the paste pot in the pot holding portion in a posture in which the through hole faces downward, and the through hole being downward A paste extruding step of extruding the paste from the through hole by pushing the bottom surface of the cylindrical member by the paste extruding portion with respect to the inner lid of the paste pot held in a posture facing the After extruding the paste from the through hole in the paste extruding step, the suction force generated by the suction force generated on the bottom surface of the cylindrical member of the paste pot Holding the bottom of the Jo member and a paste pot pulling step of pulling the tubular member by the paste extrusion unit.

  The screen printing method according to claim 4 is a contact step of bringing a substrate into contact with a mask, and a paste supplying step of extruding and supplying a paste from the paste supply device according to claim 1 onto the mask in contact with the substrate. And a squeegee sliding step of sliding the squeegee on the mask supplied with the paste.

  According to the present invention, dripping of the paste from the paste pot can be prevented.

The side view of the screen printer in one embodiment of the present invention The top view of the screen printer in one embodiment of the present invention The perspective view of the paste supply apparatus with which the screen printer in one embodiment of this invention is provided. The partially exploded perspective view of the paste supply apparatus in one embodiment of this invention (A) (b) The perspective view of the paste pot used for the paste supply apparatus in one embodiment of this invention (A) (b) (c) Explanatory drawing which shows the procedure which attaches the paste pot used for the paste supply apparatus in one embodiment of this invention to a pot holding | maintenance part. (A) Horizontal cross-sectional view (b) Circumferential cross-sectional view (c) Circumference in the vicinity of the connecting portion of the paste pot placed on the pot holding unit provided in the paste supply device according to one embodiment of the present invention Sectional view in the normal direction (A) Horizontal cross-sectional view (b) Circumferential cross-sectional view (c) Circumferential view in the vicinity of the connecting portion of the paste pot held by the pot holding portion provided in the paste supply device according to the embodiment of the present invention Normal direction cross section The lower perspective view of the paste extrusion part with which the paste supply apparatus in one embodiment of this invention is provided The block diagram which shows the control system of the screen printer in one embodiment of this invention (A) (b) (c) Operation | movement explanatory drawing of the paste supply apparatus in one embodiment of this invention Operation explanatory diagram of a screen printing machine in one embodiment of the present invention

  Embodiments of the present invention will be described with reference to the drawings. Hereinafter, the substrate transport direction (the left-right direction as viewed from the operator OP shown in FIG. 2) is the X-axis direction, and the direction perpendicular to the X-axis direction in the horizontal plane (the left-right direction of the paper surface of FIG. The front-rear direction as viewed from the operator OP is defined as the Y-axis direction, and the direction perpendicular to the horizontal plane (the vertical direction on the paper surface of FIG. 1) is defined as the Z-axis direction.

  First, the structure of the screen printer 1 will be described with reference to FIG. The screen printer 1 is a device that repeatedly executes screen printing of a paste Pst such as a solder paste on the substrate 2. The screen printing machine 1 includes a substrate holding and moving unit 3, a mask 4, a squeegee unit 5, a camera unit 6, and a paste supply device 7.

  The substrate holding / moving unit 3 is provided on the base 8 and holds and moves the substrate 2. The mask 4 is installed in a horizontal posture above the substrate holding and moving unit 3. The squeegee unit 5 is provided above the mask 4. The camera unit 6 is provided below the mask 4. The paste supply device 7 is provided integrally with the squeegee unit 5.

  Next, details of each unit provided in the screen printer 1 will be described in order. In FIG. 1, the substrate holding and moving unit 3 includes an XYθ moving mechanism 11, a base table 12, a first elevating table 13, and a second elevating table 14 provided in order on the base 8 from below. The base table 12 moves in the horizontal plane by the XYθ moving mechanism 11 and rotates around the Z axis. The first lifting table 13 is lifted and lowered with respect to the base table 12 by a first lifting table lifting motor 13m. The second lifting table 14 is lifted and lowered with respect to the first lifting table 13 by a second lifting table lifting motor 14m.

  In FIG. 1, a pair of conveyor support members 15 that extend upward through the second lifting table 14 are provided above the first lifting table 13. The pair of conveyor support members 15 support a pair of conveyors 16 that extend in the X-axis direction and are arranged to face each other in the Y-axis direction. The pair of conveyors 16 supports both ends of the substrate 2 from below and conveys them in the X-axis direction. A lower receiving member 17 is provided on the upper surface of the second lifting table 14.

  Above the pair of conveyors 16, a pair of clamp members (clampers 18) are provided that extend in the X-axis direction and are arranged to face each other in the Y-axis direction. The pair of clampers 18 are opened / closed in the Y-axis direction by the operation of the clamper opening / closing cylinder 18s, and are held (clamped) by sandwiching both ends of the substrate 2 supported by the lower receiving member 17.

  In FIG. 2, the mask 4 is composed of a flat plate portion 4a extending in an XY plane and a frame-like portion 4b surrounding and holding the outer periphery of the plate portion 4a. A pattern hole 4 h corresponding to the electrode 2 a on the substrate 2 is provided in the rectangular region of the plate portion 4 a. Similarly, the plate portion 4a is provided with a pair of mask side marks 4m corresponding to a pair of substrate side marks 2m provided at diagonal positions on the substrate 2. When the substrate 2 is brought into contact with the mask 4 in a state in which the substrate side mark 2m and the mask side mark 4m are coincident in plan view, the electrode 2a of the substrate 2 and the pattern hole 4h of the mask 4 are in agreement.

  1, 2, and 3, the squeegee unit 5 includes two squeegees 22 arranged opposite to each other in the Y-axis direction below a squeegee base 21 that extends in the X-axis direction. FIG. 3 is a perspective view of the squeegee unit 5 seen from the AA cross section in FIG. The squeegee base 21 is moved in the Y-axis direction by the squeegee unit moving mechanism 23. The two squeegees 22 are individually moved up and down with respect to the squeegee base 21 by a squeegee lifting cylinder 24 provided on the squeegee base 21.

  1 and 2, the camera unit 6 includes an upper imaging camera 31 with an imaging field of view directed upward and a lower imaging camera 32 with an imaging field of view directed downward. The camera unit 6 moves in the horizontal plane by the camera unit moving mechanism 33.

  1, 2, and 3, the paste supply device 7 is provided on the front side of the squeegee base 21, and is moved in the X-axis direction by the paste supply device moving mechanism 41. The paste supply device 7 has a function of extruding and supplying the paste Pst onto the mask 4 in contact with the substrate 2. 3 and 4, the paste supply device 7 includes a base member 51, two pot holding portions 52, and a paste extruding portion 53. The base member 51 is attached to the paste supply device moving mechanism 41. The pot holding part 52 and the paste extruding part 53 are provided on the front surface of the base member 51.

  In FIG. 4, a second guide 54 extending in the X direction is provided on the front surface of the base member 51. A slider 54 a is slidably attached to the second guide 54. A rodless cylinder 55 is provided on the front surface of the base member 51 and above the slider 54a. The rodless cylinder 55 includes a moving body 55a. A slider 54a is coupled to the moving body 55a. When the rodless cylinder 55 moves the moving body 55a in the X-axis direction, the slider 54a moves in the X-axis direction.

  In FIG. 4, a plate-like support plate 56 is coupled to the front surface of the slider 54a. A plate-like downward extending portion 57 is provided at the lower portion of the support plate 56 so as to extend forward. On the downward extending portion 57, two pot holding portions 52 are provided side by side in the X direction. The downward extending portion 57 is provided with two openings 57a through which a paste Pst supplied from a paste pot (described later) held by the pot holding portion 52 passes toward the lower mask 4. The two pot holding portions 52 are moved in the X direction by the rodless cylinder 55.

  In FIG. 4, the pot holding unit 52 includes a pair of inner lid support columns 58. The pair of inner lid support columns 58 is erected on the downwardly extending portion 57 and has a shape in which a part of the side surface of the cylinder (two opposite sides) is cut out (see also FIG. 6A). ). Plate-shaped projection receiving portions 59 are provided at the upper ends of the pair of inner lid support columns 58, respectively. The protrusion receiving portion 59 extends a predetermined length from the side surface of the inner lid support column 58 toward the outer peripheral direction. Between the pair of protrusion receiving portions 59, two notch portions 59a (notches at the upper end portion of the pot holding portion 52) are formed.

  Next, the paste pot 60 that is held in the pot holding unit 52 and supplies the paste Pst will be described. In FIG. 5A, the paste pot 60 has a structure in which an inner lid 62 is movably inserted into a bottomed cylindrical member 61 containing the paste Pst. A through hole 63 is formed at the center of the bottom 62 a of the inner lid 62. The paste pot 60 is provided in a state in which the inner lid 62 is inserted into the cylindrical member 61 containing the paste Pst, the through hole 63 is sealed with the adhesive sheet SH, and the cap CP is attached to the open side.

  5, 7, and 8, a cylindrical outer edge portion 62 b that extends outward (open side) in a state of being inserted into the cylindrical member 61 is formed at the edge of the bottom portion 62 a of the inner lid 62. . The inner periphery of the outer edge portion 62 b is larger than the outer periphery of the protrusion receiving portion 59 of the pot holding portion 52. That is, the protrusion receiving portion 59 is formed so as to be fitted inside the outer edge portion 62 b of the inner lid 62.

  Two connecting portions 64 projecting inward from the outer edge portion 62 b are formed on the outer edge portion 62 b of the inner lid 62. The two connecting portions 64 are formed at positions corresponding to the two notches 59 a of the pot holding portion 52. The circumferential length L of the connecting portion 64 is smaller than the length R of the notch 59a of the pot holding portion 52 (see FIG. 7A). When the connecting part 64 of the paste pot 60 that is turned upside down is inserted into the pot holding part 52 in accordance with the position of the notch part 59a, the bottom part 62a of the inner lid 62 does not interfere with the pot holding part 52. It contacts the upper surface of the protrusion receiving portion 59 of the holding portion 52. That is, the paste pot 60 is placed on the pot holding unit 52.

  Each connecting portion 64 includes a projecting portion 64a and a stop portion 64b. A gap S1 (gap S1 of the protrusion 64a) larger than the thickness T of the protrusion receiving part 59 of the pot holding part 52 is formed between the protrusion 64a and the bottom 62a of the inner lid 62 (FIG. 7 ( see b)). The protrusion amount (length U1 in the normal direction) of the protrusion 64a from the inner peripheral wall surface of the outer edge portion 62b is from the inner peripheral wall surface of the outer edge portion 62b when the paste pot 60 is placed on the pot holding portion 52. It is smaller than the distance U2 to the outer peripheral wall surface of the lid support column 58 (see FIG. 8C). That is, when the paste pot 60 is rotated from the state of being placed on the pot holding part 52, the protrusion receiving part 59 of the pot holding part 52 is inserted (fitted) into the gap S1 of the protrusion part 64a.

  The stop portion 64b is formed at one end of the connecting portion 64 in the circumferential direction. The clearance S2 between the stopper 64b and the bottom 62a of the inner lid 62 is smaller than the thickness T of the protrusion receiving portion 59 of the pot holder 52 (see FIG. 7B), or the stopper 64b is the inner lid. It is formed so as to be in contact with (integrate with) the bottom 62 a of 62. The paste pot 60 that is rotated from the state where it is placed on the pot holding part 52 stops at the rotational position where the stop part 64 b contacts the side wall of the projection receiving part 59.

  Next, with reference to FIGS. 4, 6, 7, and 8, a pot holding procedure for holding the paste pot 60 in the pot holding unit 52 of the paste supply device 7 will be described. First, the operator OP peels off the adhesive sheet SH that seals the through hole 63, and turns the paste pot 60 up and down to move it above the pot holding portion 52 (arrow B shown in FIG. 4).

  Next, the connecting part 64 is aligned with the position of the notch part 59a, and the paste pot 60 is placed on the pot holding part 52 (arrow C shown in FIG. 6A). Next, the paste pot 60 is rotated (arrow D shown in FIG. 6B), and the gap S1 of the protrusion 64a is fitted to the protrusion receiving part 59 of the pot holding part 52. The rotation of the paste pot 60 is stopped at a rotational position where the stopper 64b abuts against the side wall of the projection receiving part 59 (FIG. 6C). Thus, the pot holding part 52 connects the connecting part 64 provided on the inner lid 62 and the projection receiving part 59 to hold the paste pot 60 in a posture in which the through hole 63 faces downward. In this state, the vertical movement of the inner lid 62 is suppressed.

  FIG. 7A is a horizontal cross-sectional view at the height position of the upper surface of the protrusion receiving portion 59 in a state where the paste pot 60 shown in FIG. 6B is placed on the pot holding portion 52. FIG.7 (b) is EE sectional drawing of the circumferential direction of Fig.7 (a). FIG.7 (c) is FF sectional drawing of the normal line direction of the periphery of Fig.7 (a). FIG. 8A is a horizontal cross-sectional view at the height position of the upper surface of the protrusion receiving portion 59 in a state where the paste pot 60 shown in FIG. 6C is held by the pot holding portion 52. FIG. 8B is an E′E ′ cross-sectional view in the circumferential direction of FIG. FIG. 8C is a F′F ′ cross-sectional view in the normal direction of the circumference of FIG.

  Next, the paste extrusion unit 53 that extrudes the paste Pst from the through hole 63 by moving the cylindrical member 61 relative to the inner lid 62 of the paste pot 60 held by the pot holding unit 52 will be described. In FIG. 3, a bracket 70 is provided on the front surface of the base member 51. A cylinder tube 71 a of a pressing cylinder 71 is attached to the bracket 70. The pressing cylinder 71 is installed with the piston rod 71b facing downward. A disc-shaped (or cylindrical) pushing member 72 is attached to the lower end of the piston rod 71b.

  In FIG. 9, an annular member 73 is provided on the lower surface of the pushing member 72. The annular member 73 is an annular protrusion provided on the lower surface of the pushing member 72 so as to protrude downward. Here, “annular” means “circular shape” and includes a polygonal shape in addition to an annular shape. The annular protrusion may be formed directly on the lower surface of the push member 72.

  In FIG. 9, the pressing cylinder 71 moves the pushing member 72 and the annular member 73 up and down by pushing and pulling the piston rod 71 b. A suction path 74 is provided inside the pushing member 72 and the piston rod 71b. The suction path 74 is connected to a space inside the annular member 73 provided in the pushing member 72 (referred to as an inner space 73R). Further, the suction path 74 is connected to the negative pressure generating portion 76 via a pipe 75 extending outside the piston rod 71 b, and a valve 77 is interposed in the pipe 75.

  When the valve 77 is operated by the control device 80 (see FIG. 10) in a state in which the negative pressure is generated, the negative pressure generator 76 enters the inner space 73R (that is, pushes out) via the pipe 75 and the suction path 74. A vacuum pressure is applied to the lower surface of member 72. Thereby, a suction force is generated in the inner space 73R. As described above, the suction path 74, the pipe 75, the negative pressure generation unit 76, and the valve 77 constitute a suction force generation mechanism 78 that generates a suction force in the inner space 73 </ b> R of the annular member 73.

  In FIG. 3, the paste pot 60 is hold | maintained at the two pot holding parts 52 of the paste supply apparatus 7, respectively. Paste Pst is supplied from a selected one of the two paste pots 60 held. When the paste pot 60 is selected, the paste pot 60 selected by the position switching operation by the rodless cylinder 55 moves to a position directly below the pressing cylinder 71 (paste supply position). The other paste pot 60 moves to the left or right position (standby position) outside the paste supply position.

  The attachment / detachment (exchange) of the paste pot 60 to the pot holding unit 52 is performed at a position (exchange position) where the paste supply device 7 shown in FIG. 3 is moved to the left end of the squeegee base 21. At the replacement position, a plate-shaped paste receiving plate 79 extending from the lower part of the squeegee base 21 is provided to receive the paste Pst that hangs down from the paste pot 60 to be replaced so as not to fall on the mask 4.

  Next, the control system of the screen printer 1 will be described with reference to FIG. The screen printing machine 1 includes a control device 80. The control device 80 performs an operation of transporting the substrate 2 in the X-axis direction by the transport conveyor 16 included in the substrate holding and moving unit 3, and a lifting operation of the lower receiving member 17 by the second lifting table lifting motor 14 m (on the lower surface of the substrate 2 described later). (Supporting operation) is controlled. The control device 80 performs the substrate clamping operation of the clamper 18 by the clamper opening / closing cylinder 18s, the movement operation of the substrate 2 in the horizontal plane by the XYθ moving mechanism 11, and the lifting operation of the first lifting table 13 by the first lifting table lifting motor 13m (described later). The lifting / lowering operation of the clamped substrate 2 is controlled.

  The control device 80 controls the movement operation of the squeegee unit 5 and the paste supply device 7 in the Y-axis direction by the squeegee unit moving mechanism 23 and the lifting operation of each squeegee 22 by the squeegee lifting cylinder 24. The control device 80 controls the movement operation of the camera unit 6 in the horizontal plane by the camera unit moving mechanism 33, the imaging operation of the upper imaging camera 31 provided in the camera unit 6, and the imaging operation of the lower imaging camera 32. The image recognition unit 81 included in the control device 80 performs image recognition processing on image data obtained by the imaging operation of the upper imaging camera 31 and the lower imaging camera 32 and input to the control device 80.

  The control device 80 controls a position switching operation for switching the paste pot 60 located at the paste supply position by the rodless cylinder 55. The control device 80 controls the supply operation of the paste Pst from the paste pot 60 by the pressing cylinder 71 and the suction force generation mechanism 78 and the movement operation of the paste supply device 7 in the X-axis direction by the operation of the paste supply device moving mechanism 41. To do. In addition, a predetermined input operation for screen printing work in the screen printer 1 is performed at the input unit 82 connected to the control device 80.

  Next, with reference to FIG. 11, the supply procedure (paste supply method) of the paste Pst by the paste supply device 7 will be described. First, the operator OP replaces the paste pot 60 in the paste supply device 7 moved to the replacement position in accordance with the procedure of the pot holding operation described above. That is, the operator OP connects the connecting portion 64 provided on the inner lid 62 of the paste pot 60 to the protrusion receiving portion 59 of the pot holding portion 52. Thereby, the paste supply apparatus 7 hold | maintains the paste pot 60 in the pot holding | maintenance part 52 in the attitude | position with the through-hole 63 facing downward (pot holding process).

  Next, the operator OP operates the input unit 82 connected to the control device 80 to select the paste pot 60 that supplies the paste Pst. Next, the control device 80 controls the rodless cylinder 55 to perform a position switching operation, and moves the selected paste pot 60 to a paste supply position directly below the pressing cylinder 71. In this way, the paste supply device 7 enters a paste extrusion standby state in which the paste Pst can be extruded from the paste pot 60.

  Next, when the control device 80 outputs a paste extrusion command signal, the pressing cylinder 71 performs a pressing operation of the piston rod 71b. Thus, the pressing cylinder 71 lowers the pushing member 72 and brings the lower surface of the annular member 73 of the pushing member 72 into contact with the bottom surface of the cylindrical member 61 of the paste pot 60 from above. Further, the pressing cylinder 71 pushes the bottom surface of the cylindrical member 61 (arrow G shown in FIG. 11A), moves the cylindrical member 61 relative to the inner lid 62, and pushes out the paste Pst from the through hole 63. (Paste extrusion process) (FIG. 11A).

  That is, the pressing cylinder 71, the pushing member 72, and the annular member 73 push the paste Pst from the through hole 63 by moving the cylindrical member 61 relative to the inner lid 62 of the paste pot 60 held by the pot holding portion 52. It becomes the paste extrusion part 53 to take out. In a state where the pushing member 72 is in contact with the cylindrical member 61, the suction force generating mechanism 78 applies a vacuum pressure in the inner space 73R (that is, the lower surface of the pushing member 72), thereby generating a suction force. 72 (annular member 73) holds the bottom surface of the cylindrical member 61 by suction.

  When the pressing cylinder 71 pushes down the cylindrical member 61 by a predetermined amount to push out the prescribed amount of paste Pst, the control device 80 then stops outputting the paste extrusion signal. As a result, the pressing cylinder 71 switches the operation of the piston rod 71b from the pushing operation to the pulling operation, and raises the pushing member 72 to pull up the cylindrical member 61 by a certain amount (paste pot pulling step) (during FIG. 11B). Arrow H) shown. That is, the control device 80 pushes the paste from the through-hole 63 in the paste extrusion process, and then the suction force generating mechanism 78 causes the suction force generated on the bottom surface of the tubular member 61 of the paste pot 60 to move the bottom surface of the tubular member 61. The cylindrical member 61 is pulled up by the pressing cylinder 71 (paste extrusion portion 53) while being held.

  At this time, the inner lid 62 is connected to the pot holding portion 52 by the connecting portion 64, and movement in the upward direction is suppressed. By pulling up the cylindrical member 61 while the movement of the inner lid 62 is suppressed, negative pressure is generated in the cylindrical member 61, and the paste Pst in the vicinity of the through hole 63 is sucked into the cylindrical member 61 and penetrates. Dripping of the paste Pst from the hole 63 is prevented. As shown in FIG. 11C, the tubular member 61 is pulled up until the tubular cavity K extending upward from the through hole 63 is formed by the air sucked from the through hole 63. Is preferable (arrow J shown in FIG. 11C).

  Next, with reference to FIG. 12, the execution procedure (screen printing method) of the screen printing work by the screen printer 1 will be described. First, the operator OP holds the paste pot 60 in the pot holding unit 52 and puts the paste supply device 7 into a paste extrusion standby state. Next, the operator OP performs a predetermined screen printing work start operation from the input unit 82 connected to the control device 80. Upon receiving the screen printing work start operation, the control device 80 transports the substrate 2 loaded from the outside of the screen printing machine 1 by the transport conveyor 16 and positions it at a work position below the pair of clampers 18. Next, the lower receiving member 17 is raised to support the lower surface of the substrate 2 and lifted from the transfer conveyor 16, and both ends of the substrate 2 are clamped and held by a pair of clampers 18.

  When the substrate 2 is clamped, the control device 80 moves the camera unit 6 into the lower region of the mask 4, images the substrate-side mark 2 m from above with the lower imaging camera 32, performs image recognition, and positions the substrate 2. calculate. Next, the mask side mark 4m is imaged from below by the upper imaging camera 31, image recognition is performed, and the position of the mask 4 is calculated.

  After calculating the position of the substrate 2 and the position of the mask 4, the control device 80 moves the camera unit 6 to a position outside the area below the mask 4. Next, the operation control of the XYθ moving mechanism 11 is performed, and the substrate 2 is moved so that the substrate 2 is moved so that the substrate side mark 2m is located immediately below the mask side mark 4m.

  When the controller 80 aligns the substrate 2 with respect to the mask 4, the controller 80 raises the first lifting table 13 of the substrate holding and moving unit 3 (arrow L shown in FIG. 12). As a result, the electrode 2a of the substrate 2 and the pattern hole 4h of the mask 4 are matched, and the upper surface of the substrate 2 and the upper surface of the clamper 18 are in contact with the lower surface of the mask 4 (contact process).

  Next, the control device 80 moves the squeegee base 21 in the Y-axis direction to place the paste supply device 7 in a paste extrusion standby state in a predetermined position (usually in contact with the clamper 18 in front of the mask 4). To the upper position). Then, while the paste supply device 7 is moved in the X-axis direction by the paste supply device moving mechanism 41, the pressing cylinder 71 is operated to push the paste Pst from the paste pot 60 to supply the paste Pst onto the mask 4 ( Paste supply step).

  After supplying the prescribed amount of paste Pst onto the mask 4, the control device 80 pulls up the cylindrical member 61 held by the suction force to prevent the paste Pst from dripping from the through hole 63. On the other hand, the control device 80 lowers the squeegee 22 on one side (position opposite to the sliding direction) to bring the lower end portion into contact with the mask 4, and moves the squeegee base 21 in the Y-axis direction (in FIG. 12). The squeegee 22 is slid on the mask 4 (squeegee sliding step). Thereby, the paste Pst on the mask 4 is scraped by the squeegee 22 and transferred to the electrode 2a of the substrate 2 through the pattern hole 4h.

  When the transfer operation of the paste Pst is completed, the control device 80 lowers the first lifting table 13 and separates the substrate 2 from the mask 4 to release the plate. Further, after the holding (clamping) of the substrate 2 by the pair of clampers 18 is released, the lower receiving member 17 is lowered and the substrate 2 is lowered onto the transport conveyor 16. Next, the conveyor 16 is operated to carry out the substrate 2 to the outside of the screen printer 1. As a result, the screen printing operation for one substrate 2 is completed.

  As described above, in the screen printing machine 1 and the screen printing method by the screen printing machine 1 (the paste feeding method by the paste feeding device 7 and the paste feeding device 7) in the present embodiment, the paste pot 60 is provided on the inner lid 62. In the state where the connected connecting portion 64 is connected to the pot holding portion 52 and the paste pot 60 is held by the pot holding portion 52 with the through hole 63 facing downward, the paste extruding portion 53 (pressing cylinder 71, pushing member) 72, the annular member 73) pushes the bottom surface of the cylindrical member 61 to move the cylindrical member 61 relative to the inner lid 62 of the paste pot 60 to extrude the paste Pst from the through hole 63, and then the suction force generating mechanism 78. The bottom surface of the cylindrical member 61 is held by the suction force generated on the bottom surface (inner space 73R) of the cylindrical member 61 by And pulling the tubular member 61 by the paste extrusion unit 53.

  Thus, since negative pressure is generated in the cylindrical member 61 and the paste Pst in the vicinity of the through hole 63 is sucked into the cylindrical member 61, dripping of the paste Pst from the paste pot 60 can be prevented. As a result, it is possible to prevent printing paste from occurring due to the excess paste Pst falling on the mask 4 during screen printing.

  In the present embodiment, the number of connecting portions 64 provided on the inner lid 62 of the paste pot 60 and the number of corresponding cutout portions 59a of the pot holding portion 52 are not limited to two, but can be changed as appropriate. Is possible. For example, three or four may be used. Moreover, the shape of the pot holding | maintenance part 52 which connects the connection part 64 and the connection part 64, and the connection method are not limited above, but can be changed suitably. That is, the paste pot 60 can be held by the pot holding portion 52 with the through hole 63 facing downward, and the upward movement of the inner lid 62 of the paste pot 60 can be suppressed in the held state, and the cylindrical member 61 can be Any material that can generate a negative pressure in the tubular member 61 by pulling up to prevent the paste Pst from dripping from the through hole 63 may be used.

  Provided are a paste supply device, a screen printer, a paste supply method, and a screen printing method that can prevent the paste from dripping from a paste pot.

DESCRIPTION OF SYMBOLS 1 Screen printer 2 Board | substrate 4 Mask 7 Paste supply apparatus 22 Squeegee 52 Pot holding | maintenance part 53 Paste extrusion part 60 Paste pot 61 Cylindrical member 62 Inner lid 63 Through-hole 64 Connection part 78 Suction force generation mechanism Pst Paste

Claims (4)

A bottomed cylindrical member containing a paste, and a paste pot having an inner lid that is movably inserted into the cylindrical member and has a through-hole formed in the central portion;
A pot holding portion that is connected to a connecting portion provided in the inner lid and holds the paste pot in a posture in which the through hole faces downward;
A paste extruding unit that extrudes the paste from the through hole by moving the tubular member relative to the inner lid of the paste pot held in the pot holding unit;
After pushing the bottom surface of the cylindrical member of the paste pot held in the pot holding portion by the paste extruding portion to extrude the paste from the through hole, the paste is generated on the bottom surface of the cylindrical member by a suction force generating mechanism. A paste supply apparatus, wherein a bottom surface of the cylindrical member is held by a suction force and the cylindrical member is pulled up by the paste extruding portion.   A mask that is in contact with a substrate, a paste supply device according to claim 1 that is supplied by extruding and supplying a paste onto the mask that is in contact with the substrate, and a slide on the mask to which the paste is supplied by the paste supply device. A screen printing machine comprising a moving squeegee. A connection provided on the inner lid of the paste pot having a bottomed cylindrical member containing the paste and an inner lid that is movably inserted into the cylindrical member and has a through hole formed in the center. A pot holding step of connecting the part to a pot holding part and holding the paste pot in the pot holding part in a posture in which the through hole faces downward;
The bottom of the cylindrical member is pushed by the paste pushing portion against the inner lid of the paste pot held in a posture in which the through hole faces downward, and the paste is pushed out from the through hole by moving the tubular member relative to the inner lid of the paste pot. Paste extrusion process;
After extruding the paste from the through hole in the paste extrusion step, the bottom surface of the cylindrical member is held by the suction force generated on the bottom surface of the cylindrical member of the paste pot by a suction force generation mechanism, and the paste is extruded. And a paste pot pulling-up step of pulling up the cylindrical member by a section. A contact step of contacting the substrate and the mask;
A paste supply step of extruding and supplying a paste from the paste supply device according to claim 1 on the mask in contact with the substrate;
And a squeegee sliding step of sliding the squeegee on the mask supplied with the paste.

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