JP7702900B2 - Screen Printing Machine - Google Patents

Description

The technology disclosed in this specification relates to a screen printer.

A screen printer uses a mask to print cream solder on a board, and does so by smoothing the cream solder on the mask while the board is in close contact with the underside of the mask. The mask is a plate-like component with openings formed in it that correspond to the circuit pattern to be formed on the board. When the cream solder is smoothed, it can adhere to the underside of the mask. For this reason, screen printers are generally equipped with a cleaning head to clean the underside of the mask, and when certain conditions are met, the cleaning head is moved to clean the underside of the mask.

The cream solder adhering to the underside of the mask may be gelled (highly viscous). If the cream solder is gelled, cleaning may not be able to sufficiently remove the cream solder. Vibrating the mask causes the cream solder to become a sol (lower viscosity), making it easier to remove. For this reason, a screen printing machine that cleans while applying vibration to the mask is known (see, for example, Patent Document 1).
Specifically, the metal mask cleaning device for a solder paste printer described in Patent Document 1 includes a cleaning paper shaft arranged below the solder mask and an ultrasonic vibration generator that vibrates the cleaning paper shaft, and cleans the solder mask by moving the cleaning shaft while vibrating it.

Japanese Patent Application Publication No. 10-309799

However, the metal mask cleaning device described in the above-mentioned Patent Document 1 has room for improvement in terms of efficiently vibrating the solder mask.
Described herein is a technique that allows for efficient vibration of the mask when cleaning the underside of the mask.

A screen printer that uses a mask to print cream solder on a substrate, the screen printer comprising: a cleaning head that uses a cleaning medium to clean the underside of the mask; a vibration generating unit that contacts the upper surface of the mask to vibrate the mask; and a moving unit that moves the cleaning head and the vibration generating unit in synchronization.

The above configuration allows the mask to be vibrated efficiently when cleaning the underside of the mask.

FIG. 1 is a perspective view of a screen printing machine according to a first embodiment; Schematic diagram of a screen printing machine seen from the left side (with the printing table below the work position) FIG. 3 is a perspective view of a mask member; FIG. 3 is an enlarged view of the cleaning unit and the mask vibration unit shown in FIG. Top view of the mask and sidewall Schematic diagram of the mask member and the mask vibration part viewed from above Block diagram showing the electrical configuration of a screen printing machine Schematic diagram of a screen printing machine seen from the left side (printing table moved from below the work position)

(Outline of this embodiment)
(1) A screen printing machine according to the present disclosure is a screen printing machine that prints cream solder on a substrate using a mask, and includes a cleaning head that cleans an underside of the mask using a cleaning medium, a vibration generating unit that contacts an upper surface of the mask to vibrate the mask, and a moving unit that moves the cleaning head and the vibration generating unit in synchronization.

The metal mask cleaning device described in the above-mentioned Patent Document 1 vibrates the solder mask by vibrating the cleaning paper shaft. However, the cleaning paper shaft has a certain weight, so a large force is required to vibrate it. Furthermore, if the cleaning paper shaft has a certain weight, it is difficult to vibrate it at a high frequency, so the cream solder is difficult to turn into a sol.
Patent Document 1 also describes a configuration in which the solder mask frame is vibrated by contacting the solder mask frame from above. However, since the solder mask is generally supported by the solder mask frame via an elastic member such as resin or rubber, even if the solder mask frame is vibrated, the vibration is absorbed by the elastic member and is not easily transmitted to the solder mask.
For this reason, the metal mask cleaning device described in Patent Document 1 has room for improvement in terms of efficiently vibrating the solder mask.

The above screen printing machine is equipped with a vibration generating unit that contacts the upper surface of the mask to vibrate the mask. The vibration generating unit can vibrate the mask with a small force because it does not need to vibrate the cleaning paper shaft. Furthermore, since it is not necessary to vibrate the cleaning paper shaft, the mask can be vibrated at a high frequency. Furthermore, since the above screen printing machine directly vibrates the mask, vibrations are more easily transmitted to the mask than when the mask frame is vibrated.
Therefore, according to the above-mentioned screen printing machine, the mask can be vibrated efficiently when cleaning the lower surface of the mask.

(2) The cleaning head has a bottom wall portion and a side wall portion rising from the bottom wall portion, the side wall portion being two side walls spaced apart from each other in the moving direction of the cleaning head, the wall surfaces of the two side walls intersecting the moving direction, and the vibration generating unit may abut between the two side walls on the mask when viewed from above.

In the metal mask cleaning device described in the above-mentioned Patent Document 1, the entire solder mask is vibrated, so that the cream solder in areas of the solder mask that do not overlap with the metal mask cleaning device when viewed from above is also turned into a sol, and there is a possibility that the sol-ified cream solder will fall into the machine.
In the above screen printing machine, the two side walls of the side wall portion are spaced apart in the moving direction of the cleaning head, and the vibration generating unit abuts between the two side walls in the mask when viewed from above. In this way, vibration is less likely to be transmitted to the area outside the two side walls of the mask. Therefore, the cream solder attached to the outside of the two side walls of the mask is less likely to be sol-ified. Therefore, according to the above screen printing machine, it is possible to prevent the cream solder (more specifically, the cream solder attached to the area outside the two side walls on the lower surface of the mask) from falling into the screen printing machine due to vibration of the mask.

(3) A plurality of suction holes may be formed on the upper surface of the side wall portion, and a suction section may be provided that sucks in air from within the suction holes.

With the above screen printing machine, the upper surface of the side wall is in close contact with the underside of the mask via the cleaning medium when air is sucked through the suction hole, so that the upper surface of the side wall is adsorbed to the underside of the mask via the cleaning medium. This ensures that the range of vibration in the mask can be restricted to the range inside the two side walls.

(4) The side wall portion is formed in an annular shape, and the suction portion may also suck air from the space inside the annular side wall portion.

The above-mentioned screen printing machine sucks air from the space inside the annular side wall, making it easier for cream solder adhering to the inner area of the side wall on the underside of the mask to fall off. This makes it possible to clean the underside of the mask more reliably.

(5) The side wall portion may be formed in an annular shape and may include a suction portion that sucks air from the space inside the annular side wall portion.

With the above screen printing machine, the air in the space inside the annular side wall is sucked in, making it easier for the cream solder adhering to the inner area of the side wall on the underside of the mask to fall off. This makes it possible to clean the underside of the mask more reliably.

(6) The cleaning head may have a fulcrum member disposed between the two side walls, and the cleaning medium may pass under the fulcrum member between the two side walls.

The above-mentioned screen printing machine creates a space between the underside of the mask and the cleaning medium, making it easier for the cream solder adhering to the underside of the mask to fall off.

[Details of the embodiment of the present disclosure]
The present disclosure will be described below with reference to the embodiments. The present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.
The embodiments of the present disclosure can be realized in various forms, such as an apparatus, a method, a computer program for implementing the functions of the apparatus or method, and a recording medium on which the computer program is recorded.

<Embodiment 1>
A first embodiment will be described with reference to Figures 1 to 8. In the following description, the front-rear direction, the up-down direction, and the left-right direction are based on the front-rear direction, the up-down direction, and the left-right direction shown in Figure 1. In the following description, the right side shown in Figure 1 is referred to as the upstream side, and the left side is referred to as the downstream side. In the following description, the reference numerals in the drawings may be omitted for the same components, with some exceptions.

(1) Configuration of the Screen Printer The appearance of a screen printer 1 according to the first embodiment will be described with reference to Fig. 1. The screen printer 1 is a device that prints cream solder on a substrate using a mask. The screen printer 1 includes a box-shaped housing 10. An opening through which the substrate is carried in is formed in the right wall of the housing 10. An opening through which the substrate is carried out is formed in the left wall of the housing 10. The substrate is carried into the housing 10 from the opening in the right wall, and after cream solder is printed inside the housing 10, it is carried out from the opening on the left side.

The schematic configuration of the screen printing machine 1 will be described with reference to Figure 2. The screen printing machine 1 comprises a mask member 11, a printing table 12, a printing unit 13, a cleaning unit 14, and a mask vibration unit 15. Although not shown in Figure 2, the screen printing machine 1 also comprises a conveyor 52 (see Figure 7) that transports the substrate P that has been brought in from the upstream side to a working position below the mask 11C, and transports the substrate P on which the cream solder 60 has been printed at the working position to the downstream side.

(1-1) Mask Member As shown in Fig. 3, the mask member 11 includes a frame-shaped mask frame 11A and a plate-shaped mask 11C supported inside the mask frame 11A via an elastic member 11B. The mask 11C is made of aluminum, iron, or the like, and has openings (not shown) formed therein that correspond to the circuit pattern to be formed on the substrate. The elastic member 11B is made of a plate-shaped resin, rubber, or the like.

(1-2) Printing Table As shown in Fig. 2, the printing table 12 is disposed below the work position. The printing table 12 is a mechanism for lifting up the substrate P transported to the work position and bringing it into close contact with the underside of the mask 11C. The printing table 12 is equipped with a base 12A, a plurality of backup pins 12B, a push-up plate 12C on which the backup pins 12B are erected, a plate lifting section 12D which raises and lowers the push-up plate 12C, and a table moving section 12E which moves the base 12A in the front-rear direction.

The plate lifting unit 12D is a mechanism for lifting the push-up plate 12C by a ball screw. The plate lifting unit 12D has a ball screw extending downward from the lower surface of the push-up plate 12C, a ball nut screwed onto the ball screw, and a motor for rotating the ball nut.
The table moving unit 12E is a mechanism that moves the printing table 12 rearward so that the printing table 12 does not get in the way when the underside of the mask 11C is cleaned by the cleaning unit 14. The table moving unit 12E is a mechanism that moves the printing table 12 in the front-to-rear direction using a ball screw, and has a guide rail that supports the right end of the base 12A so that it can slide in the front-to-rear direction, a ball nut fixed to the left end of the base, a ball screw that screws into the ball nut and extends in the front-to-rear direction, and a motor that rotates the ball screw around its axis.

(1-3) Printing Unit The printing unit 13 includes a squeegee head 13A, two squeegee support parts 13B, two squeegees 13C, and a squeegee moving part 13D. The squeegee head 13A is a member that is long in the left-right direction. A motor that raises and lowers the squeegee support part 13B is disposed in the squeegee head 13A. The squeegee support part 13B is a rod-shaped member that is supported by the squeegee head 13A so that it can be raised and lowered. The squeegee 13C is a plate-shaped member that is long in the left-right direction, and is fixed to the lower end of the squeegee support part 13B. The rear squeegee 13C is inclined downward toward the rear. The front squeegee 13C is inclined downward toward the front.

The squeegee moving unit 13D is a mechanism that moves the squeegee head 13A in the front-rear direction using a ball screw. The squeegee moving unit 13D has a guide rail that supports the right end of the squeegee head 13A so that it can slide in the front-rear direction, a ball nut that is fixed to the left end of the squeegee head 13A, a ball screw that is screwed into the ball nut and extends in the front-rear direction, and a motor that rotates the ball screw.

(1-4) Cleaning Unit The cleaning unit 14 will be described with reference to Fig. 4. The cleaning unit 14 is a mechanism for cleaning the lower surface of the mask 11C. The cleaning unit 14 includes a cleaning head 14A, a first moving unit 14B (an example of a moving unit) that moves the cleaning head 14A in the front-rear direction, and a suction unit 14C (see Fig. 7). As shown in Fig. 2, the cleaning head 14A waits at a waiting position on the front side when cleaning is not being performed.

As shown in FIG. 4, the cleaning head 14A includes a flat base 20, an attraction body 21 fixed to the upper surface of the base 20, a paper roller 23 around which cleaning paper 22 (an example of a cleaning medium) is wound, a pair of left and right bearing parts 24 that rotatably support both ends of the paper roller 23, a take-up roller 25 that takes up the used cleaning paper 22, a pair of left and right bearing parts 26 that rotatably support both ends of the take-up roller 25, and a take-up motor (not shown) that rotates the take-up roller 25.

The suction body 21 is fixed to the upper surface of the base 20. The width of the suction body 21 in the front-rear direction is narrower than the width of the base 20 in the front-rear direction. The suction body 21 has a bottom wall portion 21A and a side wall portion 21B that rises in an annular shape from the outer peripheral edge portion of the bottom wall portion 21A. The outer peripheral shape of the side wall portion 21B is a rectangle that is long in the left-right direction when viewed from above, and a space 21C is formed inside.
As shown in Figure 5, the side wall portion 21B has two side walls 71 spaced apart from each other in the front-to-back direction (an example of the direction of movement of the cleaning head), with the wall surfaces perpendicular to the front-to-back direction (an example of an intersection), and two side walls 72 spaced apart from each other in the left-to-right direction, with the wall surfaces perpendicular to the left-to-right direction.

A plurality of through holes 31 (examples of suction holes) are formed at intervals in the front and rear side walls 71 of the side wall portion 21B and extend vertically. A plurality of through holes 32 are also formed in the bottom wall portion 21A of the suction body 21 and extend vertically.
As shown in FIG. 4, a groove 35 forming an air flow path 36 for sucking air in the plurality of through holes 31 at once and a groove 33 forming an air flow path 34 for sucking air in the plurality of through holes 32 at once are formed on the upper surface of the base 20 (or the lower surface of the suction body 21, or both the upper surface of the base 20 and the lower surface of the suction body 21). The air flow path 34 and the air flow path 36 are configured as independent air flow paths, and are connected to the suction unit 14C (see FIG. 7) via separate air hoses (not shown). The suction unit 14C is a device that supplies positive pressure and negative pressure to the air flow paths 34 and 36. The suction unit 14C may be a device that supplies only negative pressure. The magnitude of the negative pressure (suction pressure) for sucking air in the air flow path 34 may be different from the magnitude of the negative pressure for sucking air in the air flow path 36.

A cylindrical fulcrum member 21D is disposed in the space 21C inside the suction body 21, extending in the left-right direction (perpendicular to the plane of the paper in FIG. 2). The cleaning paper 22 enters the space 21C inside the suction body 21 from the front side, passes under the fulcrum member 21D, and is bent around the fulcrum member 21D before being pulled out from the rear side. The cleaning paper 22 is made of a breathable material such as nonwoven fabric.

The first moving unit 14B is a mechanism that moves the cleaning head 14A in the front-rear direction using a ball screw. The first moving unit 14B includes a guide rail that supports the left end of the base 20 so that it can slide in the front-rear direction, a ball nut that is fixed to the right end of the base 20, a ball screw that is screwed into the ball nut and extends in the front-rear direction, and a motor that rotates the ball screw.

(1-5) Mask Vibrating Unit The mask vibrating unit 15 is a mechanism that vibrates the mask 11C when the underside of the mask 11C is cleaned by the cleaning unit 14. The mask vibrating unit 15 has a vibration generating unit 40 that comes into contact with the upper surface of the mask 11C to vibrate the mask 11C, and a second moving unit 41 (an example of a moving unit) that moves the vibration generating unit 40 in the front-rear direction.

The vibration generating unit 40 has a vibration head 42, a squeegee support member 43, a cleaning metal squeegee 44, an ultrasonic generator 45, and a vibrator 46. When not performing cleaning, the vibration generating unit 40 also waits at the front standby position.
As shown in Fig. 6, the vibration head 42 is a member that is long in the left-right direction. As shown in Fig. 4, the squeegee support member 43 is a rod-shaped member, and is supported by the vibration head 42 so as to be able to rise and fall. A motor 47 that raises and lowers the squeegee support member 43 is disposed on the vibration head 42.

The cleaning metal squeegee 44 is a plate-shaped member that is long in the left-right direction. The cleaning metal squeegee 44 is fixed to the lower end of the squeegee support member 43 in an attitude that is inclined downward from the rear side to the front side. As shown in FIG. 6, the cleaning metal squeegee 44 abuts within the range that overlaps with the space 21C inside the side wall portion 21B in the mask 11C when viewed from above (in other words, between the two side walls 71).

As shown in FIG. 4, the ultrasonic generator 45 is fixed to the vibration head 42. The vibrator 46 is a rod-shaped member extending in the vertical direction. The vibrator 46 is fixed to the ultrasonic generator 45, and its lower end abuts the cleaning metal squeegee 44. When the ultrasonic generator 45 generates ultrasonic waves, the reaction causes it to vibrate at a high frequency. When the ultrasonic generator 45 vibrates, the vibrations are transmitted to the cleaning metal squeegee 44 via the vibrator 46. This causes the cleaning metal squeegee 44 to vibrate at a high frequency.

The second moving unit 41 is a mechanism that moves the vibration head 42 in the front-rear direction using a ball screw. The second moving unit 41 has a guide rail that supports the left end of the vibration head 42 so that it can slide in the front-rear direction, a ball nut fixed to the right end of the vibration head 42, a ball screw into which the ball nut is screwed, and a motor that rotates the ball screw.

(2) Electrical Configuration of the Screen Printing Machine The electrical configuration of the screen printing machine 1 will be described with reference to Fig. 7. The screen printing machine 1 includes a control unit 50 and an operation panel 51.
The control unit 50 includes a CPU 50A, a RAM 50B, and a storage unit 50C. The storage unit 50C stores various programs and data executed by the CPU 50A. An operation panel 51, a conveyor 52, the printing table 12, the printing unit 13, the cleaning unit 14, the mask vibration unit 15, and the like are connected to the control unit 50. The operation panel 51 includes a display device such as a liquid crystal display, and input devices such as a touch panel, a mouse, and a keyboard. An operator can make various settings and give operation instructions to the screen printing machine 1 by operating the operation panel 51.

(3) Cleaning of the Mask The cleaning of the mask 11C will be described with reference to Fig. 8. The control unit 50 cleans the lower surface of the mask 11C when a predetermined condition is met. The predetermined condition may be every time a circuit pattern is printed on a predetermined number of substrates P, at a predetermined time interval, when a preset time is reached, when an operator issues a cleaning command, etc. The predetermined condition may be determined as appropriate.

When the above-mentioned predetermined conditions are met, the control unit 50 moves the printing table 12 to the rear so that the printing table 12 does not interfere with cleaning. Next, the control unit 50 moves the cleaning head 14A to below the front end of the mask 11C, and the suction unit 14C sucks the air from the through holes 31, 32 of the suction body 21. When the air from the through holes 31, 32 is sucked in, the upper surface of the side wall portion 21B is adsorbed to the lower surface of the mask 11C via the cleaning paper 22, and the air in the space 21C inside the side wall portion 21B is sucked in.

Next, the control unit 50 moves the cleaning metal squeegee 44 above the range of the mask 11C that overlaps with the space 21C inside the side wall portion 21B, and lowers the squeegee support member 43 to bring the cleaning metal squeegee 44 into contact with the mask 11C. Then, while the control unit 50 vibrates the mask 11C with the cleaning metal squeegee 44, it causes the first moving unit 14B and the second moving unit 41 to move the cleaning metal squeegee 44 and the cleaning head 14A synchronously to the rear. "Moving synchronously" means moving the cleaning metal squeegee 44 and the cleaning head 14A in the same direction at the same speed while maintaining the state in which the cleaning metal squeegee 44 is in contact with the range of the mask 11C that overlaps with the space 21C inside the side wall portion 21B.

(4) Effects of the embodiment The screen printing machine 1 according to the first embodiment is provided with a vibration generating unit 40 that contacts the upper surface of the mask 11C and vibrates the mask 11C. The vibration generating unit 40 does not need to vibrate the paper roller 23 (corresponding to the cleaning paper shaft in Patent Document 1), so it can vibrate the mask 11C with a small force. Furthermore, since it is not necessary to vibrate the paper roller 23, it is possible to vibrate the mask 11C at a higher frequency than when the paper roller 23 is vibrated. Furthermore, since the screen printing machine 1 directly vibrates the mask 11C using the vibration generating unit 40, vibration is more easily transmitted to the mask 11C than when the mask frame 11A is vibrated. Therefore, according to the screen printing machine 1, it is possible to efficiently vibrate the mask 11C when cleaning the lower surface of the mask 11C.

According to the screen printing machine 1, the two side walls 71 of the side wall portion 21B are spaced apart in the front-rear direction, and the vibration generating unit 40 abuts between the two side walls 71 in the mask 11C when viewed from above. In this way, vibration is less likely to be transmitted to the area outside the two side walls 71 in the mask 11C. As a result, the cream solder 60 attached to the outside of the two side walls 71 in the mask 11C is less likely to be turned into a sol, and the cream solder 60 (more specifically, the cream solder 60 attached to the area outside the two side walls 71 on the underside of the mask 11C) can be prevented from falling into the screen printing machine 1 due to vibration of the mask 11C.

According to the screen printing machine 1, by sucking air from the through hole 31 while the upper surface of the side wall portion 21B is in close contact with the lower surface of the mask 11C via the cleaning paper 22, the upper surface of the side wall portion 21B is adhered to the lower surface of the mask 11C via the cleaning paper 22. Therefore, the vibration range of the mask 11C can be reliably limited to the range inside the side wall portion 21B.

The screen printing machine 1 sucks air from the space 21C inside the annular side wall portion 21B, making it easier for the solated cream solder 60 adhering to the inner area of the side wall portion 21B on the underside of the mask 11C to fall off. This makes it possible to more reliably clean the underside of the mask 11C.

According to the screen printing machine 1, the cleaning head 14A has a fulcrum member 21D provided in the space 21C inside the side wall portion 21B (in other words, between the two side walls 71), and the cleaning paper 22 passes under the fulcrum member 21D in the space 21C inside the side wall portion 21B, creating a space between the underside of the mask 11C and the cleaning paper 22. This makes it easier for the cream solder 60 adhering to the underside of the mask 11C to fall off.

<Other embodiments>
The technology disclosed in this specification is not limited to the embodiments described above and in the drawings, and for example, the following embodiments are also included in the technical scope disclosed in this specification.

(1) In the above embodiment, the suction portion 14C is used to suck in the air in the through hole 31 and the air in the space 21C inside the side wall portion 21B. In contrast, the through hole 31 may not be formed in the side wall portion 21B, and only the air in the space 21C inside the side wall portion 21B may be sucked in.

(2) In the above embodiment, an example was described in which air was sucked from the space 21C inside the side wall portion 21B, but the configuration may be such that air is not sucked from the space 21C.

(3) In the above embodiment, the side wall portion 21B is formed in an annular shape, but the side wall portion 21B may be configured to have only two side walls 71. In that case, the space 21C inside the side wall portion 21B is open, so air is not sucked in from the space 21C inside the side wall portion 21B.

(4) In the above embodiment, the through hole 31 is used as an example of the suction hole, but the suction hole does not necessarily have to penetrate the side wall portion 21B.

(5) In the above embodiment, the vibration generating unit 40 is provided with an ultrasonic generator 45 as a vibration source, but the vibration source is not limited to the ultrasonic generator 45. For example, the vibration source may be a sound wave generator that generates sound waves with a lower frequency than ultrasonic waves, or a motor.

(6) In the above embodiment, the moving unit that moves the cleaning head 14A and the vibration generating unit 40 in synchronization is composed of two parts, the first moving unit 14B and the second moving unit 40. However, the cleaning head 14A and the vibration generating unit 40 may be moved by a single moving unit. For example, the cleaning head 14A may be configured to support the vibration generating unit 40, and the cleaning head 14A and the vibration generating unit 40 may be moved by the first moving unit 14B.

(7) The speed at which the cleaning head 14A and the vibration generating unit 40 are moved in synchronization may be changed depending on the circuit pattern formed on the mask 11C.

1: Screen printing machine 11C: Mask 14A: Cleaning head 14B: First moving unit (an example of a moving unit)
14C: Suction portion 21A: Bottom wall portion 21B: Side wall portion 21D: Pivot member 22: Cleaning paper (an example of a cleaning medium)
31: Through hole (an example of a suction hole)
40: vibration generating unit 41: second moving unit (an example of a moving unit)
60: cream solder 71: side wall P: substrate

Claims (6)

A screen printer that prints cream solder on a substrate using a mask,
a cleaning head for cleaning the underside of the mask with a cleaning medium;
a vibration generating unit that comes into contact with an upper surface of the mask and vibrates the mask;
a moving unit that moves the cleaning head and the vibration generating unit in synchronization with each other;
Equipped with
The cleaning head has a bottom wall and a side wall rising from the bottom wall,
the side wall portion has two side walls spaced apart from each other in a moving direction of the cleaning head, and wall surfaces intersect with the moving direction,
the vibration generating unit abuts between the two side walls of the mask in a top view,
A plurality of suction holes are formed on the upper surface of the side wall portion,
The screen printing machine further comprises a suction unit that sucks air from within the suction hole . A screen printer that prints cream solder on a substrate using a mask,
a cleaning head for cleaning the underside of the mask with a cleaning medium;
a vibration generating unit that comes into contact with an upper surface of the mask and vibrates the mask;
a moving unit that moves the cleaning head and the vibration generating unit in synchronization with each other;
Equipped with
The cleaning head has a bottom wall and a side wall rising from the bottom wall,
the side wall portion has two side walls spaced apart from each other in a moving direction of the cleaning head, and wall surfaces intersect with the moving direction,
the vibration generating unit abuts between the two side walls of the mask in a top view,
A screen printing machine , wherein upper surfaces of the two side walls abut against a lower surface of the mask via the cleaning medium . 3. The screen printing machine according to claim 2,
A plurality of suction holes are formed on the upper surface of the side wall portion,
The screen printing machine further comprises a suction unit that sucks air from within the suction hole. The screen printing machine according to claim 1 or 3 ,
The side wall portion is formed in an annular shape,
The suction section also suctions air from the space inside the annular side wall section. A screen printer that prints cream solder on a substrate using a mask,
a cleaning head for cleaning the underside of the mask with a cleaning medium;
a vibration generating unit that comes into contact with an upper surface of the mask and vibrates the mask;
a moving unit that moves the cleaning head and the vibration generating unit in synchronization with each other;
Equipped with
The cleaning head has a bottom wall and a side wall rising from the bottom wall,
the side wall portion has two side walls spaced apart from each other in a moving direction of the cleaning head, and wall surfaces intersect with the moving direction,
the vibration generating unit abuts between the two side walls of the mask in a top view,
The side wall portion is formed in an annular shape,
A screen printing machine comprising a suction section that sucks air from the space inside the annular side wall section. A screen printer that prints cream solder on a substrate using a mask,
a cleaning head for cleaning the underside of the mask with a cleaning medium;
a vibration generating unit that comes into contact with an upper surface of the mask and vibrates the mask;
a moving unit that moves the cleaning head and the vibration generating unit in synchronization with each other;
Equipped with
The cleaning head has a bottom wall and a side wall rising from the bottom wall,
the side wall portion has two side walls spaced apart from each other in a moving direction of the cleaning head, and wall surfaces intersect with the moving direction,
the vibration generating unit abuts between the two side walls of the mask in a top view,
The cleaning head has a fulcrum member disposed between the two side walls,
The cleaning medium passes under the fulcrum member between two of the side walls.

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