JP3232644B2 - Screen printing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing apparatus for printing a circuit pattern on a substrate using cream solder.
More specifically, the present invention relates to a screen printing apparatus that can easily collect cream solder remaining on a screen mask.

[0002]

2. Description of the Related Art A screen printing apparatus for printing a circuit pattern on a substrate is configured such that cream solder is applied to the substrate by moving the substrate close to the lower surface of a screen mask having pattern holes formed thereon and sliding a squeegee on the screen mask. It is designed to be printed. When the type of substrate is changed, the used old screen mask is removed from the apparatus, and a new screen mask having a desired pattern hole is set in the apparatus.

[0003] In this case, the remaining portion of the remaining cream solder is adhered to the old screen mask. However, conventionally, the remaining portion of the cream solder is manually rubbed off with a spatula or the like to remove the cream solder. , And then the cream solder in the pot is supplied to a new screen mask set in the apparatus.

[0004]

However, the above work is troublesome since it is performed manually, and there is a problem that a considerable labor burden is imposed on the worker.

Accordingly, an object of the present invention is to provide an apparatus capable of automatically collecting cream solder remaining on a screen mask.

[0006]

SUMMARY OF THE INVENTION To this end, the present invention provides a collecting plate for contacting / separating a screen mask to collect cream solder on the screen mask, and a contact / separation for bringing the plate into contact with / separating from the screen mask. Means and cleaning means for removing cream solder adhering to the plate by moving in the longitudinal direction of the plate, and sucking and removing the dropped cream solder by a vacuum device. The collection plate is
It is rotatable up and down around the
The height of the step can be adjusted to the height that slides on the collection plate
A brush that is movable in the lateral direction,
Hold the brush in front with the acquisition plate in the vertical position.
Slide the collection plate and move it laterally
By this, cream solder adhering to the collecting plate
It is intended to be dropped.

[0007]

In the above arrangement, when the screen mask is replaced with a change in the type of board, the contact / separation means is driven to ground the plate on the screen mask, and the cream solder remaining on the screen mask is removed from the plate. And collect it. When the replacement of the screen mask is completed, the plate is grounded on a new screen mask, and the cream solder collected on the plate is scraped onto the screen mask. The cream solder remaining on the plate is cleaned and removed by cleaning means.

[0008]

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. Reference numeral 1 denotes a screen mask, in which pattern holes 2 are opened. Reference numeral 3 denotes a mask holder on which the screen mask 1 is set, and a guide rail 4 is provided on an upper surface thereof. Reference numeral 6 denotes a slide plate, which is mounted on the guide rail 4 via the slider 5. This sliding plate 6
Above, two cylinders 7 are provided, and a squeegee 9 is held on a rod 8 of the cylinder 7 (see also FIG. 2). When the rod 8 protrudes and retracts, the squeegee 9 moves up and down and comes into contact with and separates from the screen mask 1. 10 is a substrate, 2
0 is cream solder.

In FIG. 1, a nut 11 is mounted on the side of the sliding plate 6. A ball screw 12 is screwed into the nut 11, and when the motor 13 is driven to rotate the ball screw 12, the squeegee 9 slides on the screen mask 1. That is, the nut 11 and the ball screw 12
The squeegee 9 serves as first sliding means.

Reference numeral 21 denotes a plate for collecting the cream solder 20 provided on the screen mask 1. Both sides of the plate 21 are rotatably mounted on a block 49 connected to the rod 23 of the cylinder 22 via pins 42 (see also FIG. 4). As will be described later, when the rod 23 of the cylinder 22 protrudes and retracts, the plate 21 moves up and down to contact the screen mask 1 and separate from the screen mask 1. In FIG. 1, a slide plate 24 is mounted on the guide rail 4 via a slider 25. The cylinder 22 is mounted on the slide plate 2.
4 is attached to the lower surface. A cylinder 26 is provided on the slide plate 24. As shown in FIG.
The sliding plate 6 is provided with an arm 29 having a hole 28 formed therein, and the rod 27 of the cylinder 26 is disengaged from the hole 28 by its protruding and retracting operation.

An upright plate 31 is provided on the back side of the slide plate 24. The standing plate 31 is provided with a rodless cylinder 32. The rodless cylinder 32 has a dispenser 33 as a cream solder replenishing means.
Is installed. Therefore, the rodless cylinder 32
Is operated, the dispenser 33 moves the rod 34
To discharge the cream solder to a desired position in the lateral direction N of the screen mask 1.

A plate 21 is provided below the mask holder 3.
Cleaning means 40 is provided, and its detailed structure will be described next with reference to FIG. Reference numeral 41 denotes a box-shaped case in which a ball screw 53 is screwed via a nut 52. When the motor 54 is driven to rotate the ball screw 53, the case 41 is moved along the ball screw 53 in the lateral direction (press
(Longitudinal direction of the gate 21) . 55 is a guide rod.

A base plate 55 is mounted on the side surface of the case 41, and a vertical guide rail 56 is mounted on the base plate 55. A slider 57 is slidably fitted on the guide rail 56, and a plate 58 is mounted on the slider 57. A motor 62 is attached to the plate 58, and when the motor 62 is driven, the rotating brush 61 rotates. The plate body 58 is supported by a rod 60 of a cylinder 59, and when the rod 60 protrudes and retracts, the motor 62 and the brush 61 move to the guide rail 56.
Move up and down along. The brush 61 is surrounded by a box-shaped airtight chamber 63 (see also FIG. 5).
It is connected to a vacuum device 65 through a tube 64.

The pin 42 of the block 49 is a motor 43
When the motor 43 is driven, the plate 21 rotates up and down around the pin 42. At all times,
The case 41 is at the position of the chain line, and the brush 61 is retracted to the side of the plate 21 (the front side in FIG. 4).
As shown, the motor 43 is driven to rotate the plate 21 downward by 90 ° to bring the motor 5 into a vertical posture.
When the case 4 is driven, the case 41 moves to the position indicated by the solid line, and the brush 61 abuts against the plate 21. Then, when the motor 62 is driven, the brush 61 rotates and slides on the front surface of the plate 21 to clean the cream solder adhering thereto. In this case, the brush 61 moves in the lateral direction by driving the motor 54, and the height of the brush 61 is adjusted by projecting and retracting the rod 60 of the cylinder 59. Therefore, the brush 61 can clean the entire surface of the plate 21 by driving the motor 54 and the cylinder 59. Also, at this time, if the vacuum device 65 is driven, the cream solder rubbed off by the brush 61 is sucked and removed to the vacuum device 65 side.

The present apparatus has the above-described configuration, and the operation will be described next. As shown in FIG. 2, by driving the motor 13 and sliding the squeegee 9 back and forth, the cream solder 20 is applied to the substrate 10 through the pattern holes 2.

When the screen mask 1 is replaced in accordance with the type change of the substrate 10, the cream solder 20 remaining on the screen mask 1 is collected. In this case, FIG.
, The motor 13 is driven to
8 is moved directly below the cylinder 26, and the rod 27 is made to protrude as shown in FIG.

Next, when the motor 13 is driven, the plate 21 is pulled by the sliding plate 6 and moves to the vicinity of the cream solder 20 remaining on the screen mask 1 (FIG. 6).
(A)). Therefore, the rod 27 is pulled into the position indicated by the solid line in FIG. 3 to be separated from the hole 28, and the rod 23 of the cylinder 22 is projected to ground the plate 21 to the screen mask 1 (see the chain line in FIG. 6A).

Next, by rotating the motor 13, the squeegee 9 is slid to the right and the screen mask 1 is rotated.
The upper cream solder 20 is scraped onto the plate 21 (see FIG. 6B). Next, the squeegee 9 is
The cream solder 20 is collected on the plate 21 by retreating from the top to the left and pulling in the rod 23 of the cylinder 22 to raise the plate 21 to its original position (see FIG. 3C).

When the replacement of the screen mask 1 is completed, the rod 23 of the cylinder 22 is protruded as shown in FIG. Then, the squeegee 9 is slid by the driving of the motor 13, so that the cream solder 20 on the plate 21 is scraped out onto the screen mask 1 and supplied.

In this case, the cream solder 20 on the plate 21 is not entirely scraped off onto the screen mask 1, and a part of the cream solder 20 remains on the plate 21. The cream solder 20 remaining on the plate 21 is dried and becomes deteriorated solder, mixed with the cream solder collected at the next collection, scraped out onto the screen mask 1 by the squeegee 9 and reused when reused. Therefore, cream solder remaining on the plate 21 must be removed. Therefore, as described with reference to FIG. 4, the plate 21 is rotated downward by 90 ° to be in the vertical position, and then the motors 54 and 62 and the cylinder 5 are rotated.
9 is operated to clean and remove the cream solder adhering to the plate 21.

[0022]

As described above, according to the present invention, the cream solder remaining on the screen mask can be collected on the plate as the type of the substrate is changed, and the cream solder remaining on the plate is removed. It can be cleaned and removed by the cleaning means so as not to be reused.

[Brief description of the drawings]

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

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

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

FIG. 4 is a perspective view of a main part of the screen printing apparatus according to the present invention.

FIG. 5 is a partial sectional view of a cleaning unit according to the present invention.

6 (a) is a partial side view during the recovery and cleaning of the cream solder according to the present invention; (b) a partial side view during the recovery and cleaning of the cream solder according to the present invention; and (c) the recovery and cleaning of the cream solder according to the present invention. (D) Partial side view during collection and cleaning of cream solder according to the present invention

[Explanation of symbols]

 Reference Signs List 1 screen mask 9 squeegee 11 sliding means 12 sliding means 20 cream solder 21 plate 22 cylinder (contact / separation means) 40 cleaning means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B41F 15/40-15/44 B41F 15/08 B41F 35/00

Claims (2)

(57) [Claims] 1. A screen mask, a squeegee that slides on the screen mask to print cream solder on a substrate, a sliding unit that slides the squeegee on the screen mask, and a squeegee that contacts and separates from the screen mask. A collecting plate for collecting the cream solder on the screen mask, contacting / separating means for bringing the plate into and out of contact with the screen mask, and removing the cream solder attached to the plate by moving in a longitudinal direction of the plate. ,
Ri formed a fallen cream solder and a cleaning means for sucking and removing the vacuum device, the collecting plate has a pin
The cleaning means is rotatable up and down around
Is adjustable in height so that it can slide on the collection plate.
With a brush that is movable in the horizontal direction
With the brush in the vertical position with the brush
To slide the collection plate horizontally
This removes cream solder adhering to the collection plate.
Screen printing apparatus being characterized in that as to the. Wherein said squeegee claim 1 Symbol placement of the screen printing apparatus, characterized in that the cream solder remaining on the screen mask was so scraped into the plate.