JP3085097B2 - Screen mask cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates are those which relate to the cleaning equipment of the screen mask for applying the cream solder on the substrate.

[0002]

2. Description of the Related Art Prior to soldering electronic components to electrodes on a substrate, cream solder is printed on the electrodes on the substrate by a screen printing apparatus. The screen printing apparatus includes a screen mask in which pattern holes are opened at positions corresponding to the electrodes on the substrate. By positioning the substrate below the screen mask and sliding the print head over the upper surface of the screen mask, cream solder is printed on the electrodes through the pattern holes.

[0003] While the cream solder is repeatedly printed on the substrate, the pattern holes are clogged with the cream solder, the cream solder adheres to the upper and lower surfaces of the screen mask, and the screen mask is gradually stained by the cream solder. When the stain on the screen mask becomes excessive, the printing of cream solder on the electrodes of the substrate becomes defective. Therefore, the screen mask must be appropriately cleaned.

Heretofore, as a screen mask cleaning apparatus, there has been used an apparatus which sprays a mist-like cleaning liquid onto a screen mask while vibrating the screen mask by ultrasonic vibration means. The conventional cleaning device is separate from the screen printing device, and when the screen mask becomes very dirty, an operator removes the screen mask from the screen printing device and sets the screen mask in the cleaning device for cleaning.

[0005]

However, in the conventional cleaning apparatus, it is difficult to sufficiently clean the screen mask. Conventionally, an operator removes a dirty screen mask from a screen printing apparatus, carries the screen mask to a cleaning apparatus, sets the screen mask on the cleaning apparatus, cleans the screen mask, and then sets the cleaned screen mask on the screen printing apparatus again. Alternatively, since the screen mask was carried to a storage device and stored in the storage device, the labor burden on the operator was large.

Accordingly, an object of the present invention is to provide a screen mask cleaning apparatus capable of sufficiently cleaning a screen mask contaminated with cream solder.

[0007]

Means for Solving the Problems] The present invention To this end, the upper
The storage section that stores the screen mask in the section,
Elevating body equipped with a cleaning unit for cleaning the screen mask
Lifting means for raising and lowering the lifting body;
The screen mask is disposed in front of the storage unit or
Is taken out of the washing section and between the storage section and the washing section.
The screen mask cleaning device is constituted by the delivery means for delivery .

[0008] Preferably, the washing unit is a screen.
A spraying means for spraying a cleaning liquid onto the mask;
A container for receiving the washing liquid was provided below the body .

[0009]

[0010]

According to the above arrangement, the screen mask contaminated with cream solder can be sufficiently washed.

[0011]

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a screen printing apparatus according to one embodiment of the present invention. 2 and 3, and FIG. 4 (a)
(B) is the same partial sectional view. 1 and 2,
On the upper surface of the base 1, an X-direction table 2 and a Y-direction table 3 as substrate positioning means are mounted. A pair of left and right substrate holders 4 supported by a lifting table 10 are provided on the Y-direction table 3. This substrate holder 4
Is positioned by clamping the substrate 5 from the left and right. When the motor 6 of the X-direction table 2 is driven, the substrate 5 moves in the X direction, and when the motor 7 of the Y table 3 is driven, the substrate 5 moves in the Y direction. When a driving motor (not shown) built in the lifting table 10 is driven, the substrate holder 4 moves up and down. A carry-in conveyor 8 and a carry-out conveyor 9 are provided beside the substrate holder 4. The carry-in conveyor 8 carries the substrate 5 into the substrate holder 4. The carry-out conveyor 9 receives the board 5 on which the cream solder printing has been completed from the board holder 4 and carries it out. Note that the transport direction of the substrate 5 is the X direction,
The direction orthogonal to the direction in the horizontal plane is defined as the Y direction.

Above the substrate holder 4, a pair of right and left guide portions 11 for supporting both side portions of the screen mask 16 are provided (see also FIG. 2). The screen mask 16 includes a mask plate 19 having pattern holes 18 formed at positions corresponding to the electrodes of the substrate 5 and a mask holder 17 for holding the mask plate 19 (see also FIG. 7). The screen mask 16 includes a print head 20 described later.
Is conveyed on the guide portion 11 in the Y direction. A stopper 12 for stopping the screen mask 16 above the substrate 5 is provided at the tip of the guide portion 11 (see FIG. 1). A cylinder 13 is mounted on the side surface of the tip of the guide portion 11. This cylinder 1
3 fixes the screen mask 16 by pressing the mask holder 17 against the guide portion 11 by the rod 14 projecting downward (see FIG. 2). In this embodiment, the guide portion 11 and the cylinder 13 correspond to a fixing means of the screen mask 16.

A print head 20 is provided on the guide section 11 so as to be slidable in the Y direction. 1 to 3,
The print head 20 includes a base plate 21, two cylinders 22 mounted on the base plate 21, and two squeegees 24 mounted on a lower end of a rod 23 of the cylinder 22. A cream solder 25 is stored between the squeegees 24. A nut 26 is mounted on the side of the base plate 21. The nut 26 is screwed into a feed screw 27 provided along the side surface of the one guide portion 11. When the feed screw 27 rotates by driving the motor 28, the squeegee 24 slides on the upper surface of the mask plate 19.

2 and 3, when the motor 6 of the X-direction table 2 and the motor 7 of the Y-direction table 3 are driven, the substrate 5 moves horizontally in the X and Y directions.
And the pattern holes 18 of the mask plate 19 are aligned. Thereafter, the elevating table 10 is driven to raise the substrate 5 clamped to the substrate holder 4 and abut the lower surface of the mask plate 19. In that state, squeegee 2
4 slides on the mask plate 19, so that the cream solder 25 is printed on the electrodes through the pattern holes 18.

In FIGS. 1 and 3, two cylinders 29 are provided on the front surface of the base plate 21. FIG. 4 (a)
When the rod 29a of the cylinder 29 protrudes downward as shown in FIG.
9a pushes the outer surface of the mask holder 17 to convey the screen mask 16 rightward along the guide portion 11. As shown in FIG. 4B, when the motor 28 rotates forward,
The rod 29a pushes the inner surface of the mask holder 17 to convey the screen mask 16 to the left. In FIG. 3, 35
Is a cream solder supply container fixed to the base plate 21,
New cream solder 25 is supplied onto the mask plate 19 from the lower nozzle 36.

In FIG. 1, a screen mask cleaning device 50 is provided on the side of the base 1. A transport unit 40 for transporting the screen mask 16 is provided between the screen mask cleaning device 50 and the guide unit 11. 5 is a perspective view of a screen mask cleaning apparatus according to one embodiment of the present invention, FIG. 6 is a partial sectional view of the same, FIG. 7 is a partial perspective view of the same, FIG. 8 is a sectional view of the same, FIG. FIG. 11 is a perspective view of the same container, FIG.
3 and 14 are the same sectional views. 1 and 5, the transport unit 40 is configured by arranging a belt conveyor 42 and a guide plate 43 on a support frame 41. The front face of a main body box 51, which is the main body of the screen mask cleaning device 50, has a screen mask inlet / outlet 52.
Is open. 51 'is an opening / closing door. FIG. 4 (a)
As shown in (2), the screen mask 16 is pushed by the rod 29a of the cylinder 29 and is sent from above the guide portion 11 onto the belt conveyor 42. So the belt conveyor 42
Rotates in the opposite direction, the screen mask 16
2 is sent into the body box 51. When the screen mask 16 is sent out from the main body box 51 onto the belt conveyor 42, the belt conveyor 42 rotates forward and sends out the screen mask 16 onto the guide portion 11. Next, as shown in FIG. 4B, when the rod 29a of the cylinder 29 moves to the left, the screen mask 16 is conveyed to the left and hits the stopper 12 (FIG. 1) and stops.

FIG. 8 shows the internal structure of the main body box 51. FIG. 9 is a perspective view of a box-shaped frame 30 built in a main body box 51 which is a main body of the screen mask cleaning device 50. Vertical feed screws 60a and 60b are provided on both sides of the main body box 51. A plate 6 is provided between the left and right feed screws 60a and 60b.
One is spanned. Nuts 62 are mounted on both sides of the plate 61, and the feed screws 60 a and 60 b are screwed to the nut 62. In FIG. 8, a motor 63 is provided above the main body box 51. Motor 6
3 rotates one feed screw 60a. Motor 6
3 is transmitted to the other feed screw 60b via the pulley 64 and the belt 65, and the feed screws 60a, 60b
Rotate at the same time. A duct 51a is provided on the upper surface of the main body box 51. The cleaning liquid (described later) contains a solvent.
is discharged from a.

In FIG. 9, the case 30 is connected to the lower surface of the plate 61. The case 30 is vertically divided by a partition plate 31. On both sides of the case 30 above the partition plate 31, storage portions for storing the screen mask 16 are provided, and three stages of racks 67a, 67b, 67c are provided. A cleaning unit 70 is provided below the case 30. When the motor 63 (FIG. 8) rotates forward, the nut 62 moves up along the feed screws 60a and 60b, and the case 30 also moves up. When the motor 63 rotates in the reverse direction,
Case 30 descends. Racks 67a, 67b, 67c
When the screen mask 16 is to be taken in and out, the motor 63 is driven to position the rack for taking in and out the screen mask 16 at the same height as the slot 52.

Next, a mechanism for taking the screen mask 16 in and out of the racks 67a, 67b and 67c will be described with reference to FIGS. 6 and 8, on both sides of the case 30, the transport units 54 are attached to the inside of the main body box 51 by attachments (not shown). The transport unit 54 is driven by driving means (not shown) in the direction of arrow R to move forward and backward. In FIG. 7, the transport unit 5
4 includes a roller 56 rotated by a motor 57. 6 and 9, openings 58 are formed on both sides of the case 30 corresponding to the position of the transport unit 54, and notches 58a, 58b, 58c are formed on the racks 67a, 67b, 67c, respectively. I have. 6 and 7, when the screen mask 16 housed in the rack 67a is carried out to the transport unit 40, the rack 67a
Is positioned at the same height as the entrance 52, the transport unit 54 is advanced in the direction of arrow R to bring the roller 56 into contact with the side surface of the mask holder 17. Then, the motor 57 is driven to send out the screen mask 16 onto the belt conveyor 42, and then the screen mask 16 is sent out of the main body 51 by the belt conveyor 42. When the screen mask 16 is stored in the rack 67a, the rear portion of the screen mask 16 is advanced to the notch 58a of the rack 67a by the belt conveyor 42, and then transported by the transport unit 54 to be completely stored on the rack 67a. After the loading / unloading operation is completed, the transport unit 54 retreats so as not to hinder the elevation of the case 30.

Next, the cleaning section 70 will be described with reference to FIGS. In FIG. 9, a box-shaped case 85 is mounted on the lower surface of the partition plate 31. In FIG. 13, a horizontal ball screw 84 is rotatably mounted inside the case 85, and a ball screw 8
4 is mounted. Case 8
A guide rail 87 is mounted on the lower surface of 5, and a slider 88 fixed to the upper surface of the frame 71 is slidably fitted on the guide rail 87. A ball nut portion 83 screwed to a ball screw 84 is fixed to the upper surface of the frame 71. Therefore, when the motor 86 is driven, the frame 71 moves in the directions of arrows N1 and N2.

In FIG. 9, cutouts 30a are formed at the lower ends on both sides of the case 30, and the frame 71 projects out of the case 30 from the cutouts 30a.
A pair of left and right racks 68 as holding means is attached to the lower end of the case 30 in a state of being bridged over the notch 30a, and penetrates the inside of the frame 71.
The rack 68 supports the screen mask 16 to be cleaned. The rack 68 has an opening 68a through which the roller 56 of the transport unit 54 described above enters.
Are formed, and the screen mask 16 can be moved in and out in the same manner as in the case of the racks 67a, 67b and 67c. 10, eight pipes 721 to 728 are provided horizontally inside a frame 71 (FIG. 1).
3). 73 is a pipe 7 for pipes 721 to 728
This is a support portion for fixing to 1. Four pipes 721
724 at the bottom of the frame 71 and four pipes 7
25 to 728 are provided inside the frame 71.
The pipes 721 to 728 are connected to tubes 741 to 748, respectively. Tubes 741, 744, 745, 7
Reference numeral 48 is connected to a cleaning liquid supply device (not shown), and the tubes 742, 743, 746, and 747 are connected to air supply devices (not shown). On the upper surfaces of the lower pipes 721 to 724, a large number of small holes 75 are formed at a small pitch. The upper pipes 725 to 72
Similarly, a large number of small holes 75 are formed at a small pitch on the lower surface of 8. Pipes 721, 722, pipes 723, 72
4. Two pipes 725, 726 and two pipes 727, 728 are supported by the support part 73, respectively. The outer pipes 721, 724, 725, 728 have their small holes 75
Spout the cleaning solution from In this embodiment, the pipes 721, 7
24, 725, 728 are means for spraying the cleaning liquid. The inner pipes 722, 723, 726, and 727 blow out air from the small holes 75. In this embodiment, the pipe 7
22, 723, 726, 727 are drying means.

In FIG. 13, a cylinder 76 is provided on the frame 71 between the lower pipe 722 and the pipe 723. A wiper 781 is mounted on the rod 76a of the cylinder 76. Rod 76a of cylinder 76
Is protruded, the wiper 781 rises and comes into contact with the lower surface of the mask plate 19 of the screen mask 16 supported by the rack 68. The upper pipe 726 and pipe 72
A vibrator 80 as a vibrating means is provided between 7. The vibrator 80 is connected to a rod 82 of a cylinder 81 which is mounted downward on the inner upper surface of the frame 71. Therefore, when the rod 82 projects, the vibrator 80
Descends and contacts the upper surface of the mask plate 19. Then, when the vibrator 80 is driven, the mask plate 19 vibrates ultrasonically.

A wiper 782 is provided downward between the pipe 726 and the vibrator 80. Also, a wiper 783 is provided downward between the pipe 727 and the vibrator 80. The wipers 782, 783 are connected to a rod of a cylinder 79 which is mounted downward on the inner upper surface of the frame 71. When the rod projects, the wipers 782, 783 move down and contact the upper surface of the mask plate 19.

As shown in FIG. 8 and FIG.
A container 89 is provided below 1. Container 89-4
A pin 90 is provided upright at the corner (see also FIGS. 11 and 12). Reference numeral 71a (FIG. 11) denotes a notch formed in the frame 71, into which the pin 90 is fitted. As shown in FIGS. 12 and 13, the rack 68 having a U-shaped cross section is formed with a notch 69 into which the pin 90 is fitted. In FIG. 8, when the motor 63 rotates in the reverse direction, the frame 71
Descends. FIG. 14 shows a state where the frame 71 is lowered. In this state, the pin 90 enters the inside of the rack 68 having a U-shaped cross section from the concave portion 69 and pushes up the mask holder 17 of the screen mask 16 housed in the rack 68 having a U-shaped cross section. The screen mask 16 is fixed between the inner upper surface and the pins 90.

This screen printing apparatus is configured as described above, and its operation will be described below. 15 to 2
FIG. 4 is an explanatory diagram of the operation of the screen printing apparatus according to the embodiment of the present invention, which is shown in the order of operation. Hereinafter, the operation will be described with reference to FIGS.

Referring to FIG. 15, the first
Is located. A second screen mask 16b and a third screen mask 16c are housed in a rack in the case 30 of the screen mask cleaning apparatus 50. Second screen mask 1
6b is mounted on the lowermost rack 67c shown in FIG. The third screen mask 16c is stored in the uppermost rack 67a. The middle rack 67b is empty, and the first screen mask 16a is stored in the rack 67b as described later.

Referring to FIG. 15, the substrate 5 is positioned below the first screen mask 16a (see also FIG. 3), and the squeegee 24 is slid in the Y direction.
The cream solder 25 is printed on the electrodes of the circuit pattern on the substrate 5. When the cream solder 25 is repeatedly applied to the substrate 5, the lower surface of the mask plate 19 gradually becomes dirty with the cream solder 25. Therefore, as described below, the first screen mask 16a is collected in the main body box 51 and is cleaned.

First, the rod 14 of the cylinder 13 (see FIGS. 1 and 2) is lifted to release the fixed state of the screen mask 16a fixed above the substrate holder 4, and thereafter, FIG. As shown in FIG.
The first screen mask 16a is pushed in the N11 direction by the rod 29a by moving the print head 20 by projecting the rod 29a of No. 9 and moving it onto the belt conveyor 42 of the transport unit 40. Then the rod 2 of the cylinder 29
9a is raised. Next, as shown in FIG. 17, the belt conveyor 42 sends the first screen mask 16a into the main body box 51, and then the first screen mask 16a is transferred to the rollers 56 of the transport unit 54 (FIG. 7).
Rotates forward and the rack 68 at the lower part of the frame 30 (FIG. 9)
The rack 68 holds the screen mask 16 a above the container 89.

The rack 68 is set in advance at a height at which the screen mask 16a can be received from the belt conveyor 42 by the motor 63. Next, as shown in FIG. 18, the case 3 is rotated by rotation of the motor 63 (FIG. 8).
0 falls (arrow N12), and the second screen mask 1
6b is positioned at the same level as the belt conveyor 42.
Then, the second screen mask 16b is sent out onto the belt conveyor 42 by the reverse rotation of the roller 56 of the transport unit 54 (arrow N13). Next, the conveyor 42 sends out the second screen mask 16b onto the guide portion 11.

Next, as shown in FIGS. 4B and 19, the print head 20 is moved to move the cylinder 29 into the inside of the mask holder 17 of the second screen mask 16b, where the rod 29a of the cylinder 29 is moved. To protrude. When the print head 20 is moved in the direction of the arrow N14, the second screen mask 16b is pushed by the rod 29a and transported to a position where the second screen mask 16b comes into contact with the stopper 12 on the guide portion 11, and the cylinder 13 (see FIGS. 1 and 2). ) Is fixed on the guide portion 11. Then cylinder 29
After the rod is lifted, new cream solder 25 is supplied from the cream solder supply container 35 to the second screen mask 16.
b and waits for printing.

At the same time, the case 30 descends into the container 89 (arrow N15 in FIG. 19). In this state, the first screen mask 16a is supported by the pins 90 as shown in FIG.
6a is fixed in the rack 68 so as not to shift in the horizontal direction. In this embodiment, the cylinder 29, the print head 20,
The belt conveyor 42 and the transport unit 54 constitute a transport unit that transports the screen mask between the fixing unit and the cleaning unit. Subsequently, in FIGS. 3 and 20, the squeegee 24 slides on the second screen mask 16b, so that the cream solder 25 is printed on the substrate 5. At the same time, the first screen mask 16a is cleaned by the cleaning unit 70.

Next, a method of cleaning the first screen mask 16a by the cleaning unit 70 will be described. 25 to 28
FIG. 2 is a sectional view of a cleaning unit of the screen printing apparatus according to one embodiment of the present invention. First, as shown in FIG.
The cleaning liquid is spouted from 1,724,725,728,
It is sprayed on the upper and lower surfaces of the mask plate 19 of the first screen mask 16a. At this time, the motor 86 (FIG. 1)
By driving 3) to rotate the feed screw 84,
The frame 71 is moved in the horizontal direction (arrow N16), and the cleaning liquid is sprayed on the entire surface of the mask plate 19. At this time,
The wipers 781 to 783 and the vibrator 80 retreat downward or upward so as not to hit the mask plate 19.
The cleaning liquid ejected from the pipes 721, 724, 725, 728 accumulates in the container 89.

Next, as shown in FIG.
The tips of the wipers 781 to 782 are brought into contact with the lower and upper surfaces of the mask plate 19 by projecting the rods 76a and 79a. Therefore, pipes 721, 724, 7
The frame 71 is moved in the lateral direction while still ejecting the cleaning liquid from 25 and 728 (arrow N16). Then, the cream solder 25 adhering to the lower surface of the mask plate 19 is wiped by the wiper 781, and the cream solder 25 adhering to the upper surface is wiped by the wipers 782 and 783, and flows down from the pattern holes 18 of the mask plate 19 and the like. . If the wipers 781 to 783 are slid along the mask plate 19, the cream solder 25 attached to the upper and lower surfaces thereof can be removed. However, the cream solder 25 attached to the inside of the pattern hole 18 cannot be removed.

Next, a method of cleaning the cream solder 25 adhering in the pattern hole 18 will be described. In FIG. 27, the wipers 782 and 783 are retracted upward, and the vibrator 80 is lowered to land on the upper surface of the mask plate 19. Then, the vibrator 80 is driven to ultrasonically vibrate the mask plate 19. And pipes 721 and 72
If the frame 71 is moved in the horizontal direction while the cleaning liquid is being ejected from 4,725,728, the cream solder 25 adhering to the inside of the pattern hole 18 is removed.

Next, as shown in FIG.
To 783 are brought into contact with the lower surface and the upper surface of the first screen mask 16a. Pipes 721, 724, 725, 7
Of the cleaning liquid from the pipe 28 is stopped, and
Air is blown from 2,723,726,727. By moving the frame 71 in the lateral direction in this manner, the entire surface of the mask plate 19 is dried. The air blown from the pipes 722, 723, 726, 727 may be cold air, but is preferably hot air. Wipers 781
783 is a first screen mask 16a for draining
However, draining by the wipers 781 to 783 is not necessarily performed, and in that case, the wipers 781 to 783 are retreated downward or upward so as not to contact the first screen mask 16a. deep. When the cleaning of the first screen mask 16a is completed as described above, the blowing of air from the pipes 722, 723, 726, and 727 is stopped, and the wipers 781 to 783
Retreat downwards and upwards.

Next, with reference to FIGS. 21 to 24, the operation of recovering the first screen mask 16a held by the rack 68 and having been cleaned as described above to the rack 67b (FIG. 9) will be described. First, the motor 63 is driven to raise the case 30 (arrow N17 in FIG. 21), and the first screen mask 16a is set to the same level as the conveyor 42.
Next, as shown in FIG. 22, the first screen mask 16
a is sent out onto the belt conveyor 42 (arrow N18).

Next, as shown in FIG. 23, the case 30 is lowered (arrow N19), and the rack 67b (FIG. 9) is set to the same level as the first screen mask 16a on the belt conveyor 42. Subsequently, the first screen mask 16a is sent into the rack 67b by the same operation as in the case of FIG. 17 (arrow N20 in FIG. 24). As described above,
First screen mask 1 cleaned by cleaning unit 70
6a is collected in a predetermined rack 67b in the case 30. In this embodiment, the motor 63, the transport unit 54, and the belt conveyor 42 correspond to a transfer unit that transfers the screen mask between the storage unit and the cleaning unit.

[0039]

As described above, according to the present invention, it is possible to sufficiently clean a screen mask which is contaminated by cream solder. In addition, since the screen mask can be automatically cleaned and collected in the storage unit, the labor burden on the operator can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a screen printing apparatus according to an embodiment of the present invention.

FIG. 2 is a partial sectional view of a screen printing apparatus according to an embodiment of the present invention.

FIG. 3 is a partial sectional view of a screen printing apparatus according to an embodiment of the present invention.

4A is a partial cross-sectional view of a screen printing apparatus according to one embodiment of the present invention. FIG. 4B is a partial cross-sectional view of a screen printing apparatus according to one embodiment of the present invention.

FIG. 5 is a perspective view of a screen mask cleaning apparatus according to an embodiment of the present invention.

FIG. 6 is a partial sectional view of a screen mask cleaning apparatus according to one embodiment of the present invention.

FIG. 7 is a partial perspective view of a screen mask cleaning apparatus according to an embodiment of the present invention.

FIG. 8 is a sectional view of a screen mask cleaning apparatus according to one embodiment of the present invention.

FIG. 9 is a partial perspective view of a screen mask cleaning apparatus according to one embodiment of the present invention.

FIG. 10 is a partial perspective view of a screen mask cleaning apparatus according to one embodiment of the present invention.

FIG. 11 is a plan view of a screen mask cleaning apparatus according to an embodiment of the present invention.

FIG. 12 is a perspective view of a container of the screen mask cleaning apparatus according to one embodiment of the present invention.

FIG. 13 is a sectional view of a screen mask cleaning apparatus according to one embodiment of the present invention.

FIG. 14 is a sectional view of a screen mask cleaning apparatus according to an embodiment of the present invention.

FIG. 15 is a diagram illustrating the operation of the screen printing apparatus according to one embodiment of the present invention.

FIG. 16 is an explanatory diagram of the operation of the screen printing apparatus according to one embodiment of the present invention.

FIG. 17 is an explanatory diagram of the operation of the screen printing apparatus according to one embodiment of the present invention.

FIG. 18 is a diagram illustrating the operation of the screen printing apparatus according to one embodiment of the present invention.

FIG. 19 is a diagram illustrating the operation of the screen printing apparatus according to one embodiment of the present invention.

FIG. 20 is an explanatory diagram of the operation of the screen printing apparatus according to one embodiment of the present invention.

FIG. 21 is an explanatory diagram of the operation of the screen printing apparatus according to one embodiment of the present invention.

FIG. 22 is an explanatory diagram of the operation of the screen printing apparatus according to one embodiment of the present invention.

FIG. 23 is an explanatory diagram of the operation of the screen printing apparatus according to one embodiment of the present invention.

FIG. 24 is an explanatory diagram of the operation of the screen printing apparatus according to one embodiment of the present invention.

FIG. 25 is a sectional view of a cleaning unit of the screen printing apparatus according to one embodiment of the present invention.

FIG. 26 is a sectional view of a cleaning unit of the screen printing apparatus according to one embodiment of the present invention.

FIG. 27 is a sectional view of a cleaning unit of the screen printing apparatus according to one embodiment of the present invention.

FIG. 28 is a sectional view of a cleaning unit of the screen printing apparatus according to one embodiment of the present invention.

[Explanation of symbols]

2 X-direction table (substrate positioning means) 3 Y-direction table (substrate positioning means) 4 Substrate holder (substrate positioning means) 5 Substrate 11 Guide part (screen mask fixing means) 16, 16a, 16b, 16c Screen mask Reference Signs List 18 pattern hole 19 mask plate 20 print head 25 cream solder 40 transfer unit 50 screen mask cleaning device 67a, 67b, 67c rack 68 rack (holding means) 70 cleaning unit 721, 722, 723, 724, 725, 726, 7
27,728 Pipe 781,782,783 Wiper 89 Container

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B41F 35/00 B41F 15/08 B41F 15/12 B41F 15/40

Claims (2)

(57) [Claims] An elevating body provided with an accommodating part for accommodating a screen mask at an upper part, a washing part at a lower part for washing a dirty screen mask, elevating means for elevating the elevating body,
A screen mask, which is provided in front of the elevating body, takes out the screen mask out of the storage section or the cleaning section, and includes a transfer unit that transfers the screen mask between the storage section and the cleaning section. Cleaning equipment. 2. A method according to claim 1, wherein said cleaning portion is provided with a blowing device for blowing cleaning liquid to the screen mask, is disposed a container for receiving the cleaning solution below the lifting body
The apparatus for cleaning a screen mask according to the above.