JPH0542669A - Screen mask cleaning device - Google Patents

Abstract

PURPOSE:To clean a screen mask more cleanly by a method wherein in addition to the rear surface of a screen mask, the inside of pattern holes perforated in the mask is cleaned. CONSTITUTION:A screen mask cleaning device consists of a wiping means 2 disposed under a screen mask 1 for wiping a cream solder 7 adhering to the rear surface of the screen mask 1; a sucking means 5 also disposed under the screen mask 1 fox sucking a cream solder 7' in pattern holes 6 perforated in the screen mask 1; and a reciprocating means M fox integrally reciprocating the wiping means 2 and the sucking means 5 in a horizontal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen mask cleaning device, and more particularly to a device for effectively cleaning cream solder deposited on the back surface of a screen mask or in pattern holes.

[0002]

Prior to mounting electronic components such as ICs, LSIs, capacitor chips and resistor chips on a substrate,
The screen printing machine applies the cream solder on the land of the substrate. A screen mask of a screen printing machine is formed by forming a pattern hole at a cream solder application location, and cream solder is applied through the pattern hole by sliding a squeegee on the screen mask.

At this time, part of the cream solder leaks from the pattern hole to the back side of the screen mask and adheres to the back side. When the adhered cream solder is transferred to the substrate, it causes a short circuit or the like. Therefore, the back surface of the screen mask is regularly or appropriately cleaned by a cleaning device.

FIG. 5 is a side view of a conventional cleaning device, in which a soft tape-shaped paper 10 is attached to a roll 101.
2 is wound and this paper 102 is used as a screen mask 1
By sliding along the back surface of 03, the cream solder 105 leaked from the pattern hole 104 to the back surface was wiped off.

[0005]

However, with such a paper 102, only the cream solder 105 leaking from the pattern hole 104 to the back side can be wiped off, and the cream solder 105 ′ attached to the pattern hole 104.
Could not be removed by cleaning.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a screen mask cleaning device capable of cleaning not only the back surface of the screen mask but also the inside of the pattern holes at the same time.

[0007]

To this end, the present invention provides a wiping means which is below the screen mask and wipes off the cream solder adhering to the back surface of the screen mask.
Similarly, below the screen mask, suction means for sucking the cream solder in the pattern hole opened in the screen mask and reciprocating movement for integrally reciprocating the wiping means and the suction means in the horizontal direction. And a cleaning device for a screen mask.

[0008]

According to the above construction, the reciprocating means is driven to integrally reciprocate the wiping means and the suction means in the horizontal direction, and the cream solder adhering to the back surface of the screen mask is wiped off by the wiping means. By sucking the cream solder in the pattern hole opened in the screen mask by the suction means, the screen mask can be cleaned more favorably.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a side view of a screen mask cleaning device of the present invention. Reference numeral 2 denotes a roller, which is below the screen mask 1 and has cream solder 7 attached to the back surface of the screen mask 1 by a soft tape-shaped paper 3 wound around the roller 2 (see FIG. 2).
Wipe off. A pressing roller 4 constitutes a wiping means for wiping the cream solder 7 adhering to the back surface of the screen mask 1 from these components 2 to 4.

Reference numeral 5 is a suction means having a suction nozzle 13, which is below the screen mask 1 and sucks the cream solder 7 '(see FIG. 2) in the pattern hole 6 opened in the screen mask 1. .. The details of the suction means 5 will be described later. Reference numeral 8 denotes a casing in which the roller 2, the pressing roller 4, and the suction means 5 are housed. 9
Is a nut, and is provided at the bottom of the casing 8. Reference numeral 10 is a ball screw, and M is a motor. By driving the motor M, the ball screw 10 rotates and the roller 2 and the suction means 5 housed in the casing 8 are moved. Then, the roller 2 is reciprocally moved integrally in the horizontal direction as the traveling direction B when the roller 2 is pulled back.

Although the suction by the suction means 5 is always performed during cleaning, the wiping by the roller 2 may or may not be performed, and the suction by the suction means 5 is stopped at the time of pulling back, but the wiping by the roller 2 is the same. You may or may not go. However, in the present embodiment, during cleaning with the suction means 5 side as the traveling direction,
First, the suction means 5 suction-cleans the cream solder 7'in the pattern holes 6, and then the back surface of the screen mask 1 is cleaned with the paper 3. This allows
When the back surface of the screen mask 1 is wiped, which occurs when the traveling direction is reversed, the cream solder 7 that could not be wiped off is pushed into the pattern hole 6 and the suction amount of the cream solder 7 ′ by the suction means 5 is increased. Increase
It is possible to prevent the risk of suction leakage. In addition,
The suction means 5 and the roller 2 may be moved in any direction. These components 8 to 10 and M constitute a reciprocating means for integrally reciprocating the roller 2 and the suction means 5 in the horizontal direction.

Next, the suction means 5 will be described in detail.
FIG. 3 is a perspective view of the main part of this device.

Reference numeral 11 denotes a horizontally long suction portion, which is connected to an air suction device (not shown) via a suction pipe 12. Reference numeral 13 denotes a nozzle, which is mounted on the suction portion 11 in a biased state via a hinge 14 having a spring 14a. In FIG. 4, 15 is a pair of left and right height adjusting bolts, which are erected in the casing 8 to adjust the height of the suction means 5. Reference numeral 16 is a filter of the sucked cream solder 7 ', which is housed in the upper portion of the suction portion 11 in a replaceable manner. By driving an air suction device (not shown), the pattern holes 6
The cream solder 7 ′ therein is sucked from the nozzle 13 and filtered by the filter 16. The replacement of the filter 16 is performed by laying the nozzle 13 sideways around the hinge 14 and opening the upper part of the suction portion 11 as shown by the chain line in the figure.

The present apparatus has the above-mentioned structure, and its operation will be described below. As shown in FIG. 1, by driving the motor M, the casing 2 and the roller 2 and the suction means 5 are moved.
Is integrally moved in the arrow direction A with the suction means 5 side as the traveling direction. In FIG. 4, with this movement,
The cream solder 7'in the pattern hole 6 in the traveling direction is
The cream solder 7 attached to the back surface of the screen mask 1 is wiped off by the paper 3 which is sucked from the nozzle 13 and then wound around the roller 2. In this way, the cream solder 7 attached to the back surface of the screen mask 1 is wiped off with the paper 3 and the pattern holes 6
By sucking the cream solder 7'inside by the suction means 5, the screen mask 1 can be cleaned more favorably.

In FIG. 1, when the cleaning work of the screen mask 1 is completed, the motor M is rotated in the reverse direction to move the roller 2 and the suction means 5 whose driving is stopped in the direction of the arrow B to the original position. Restore and wait for next cleaning.

[0017]

As described above, according to the present invention, there is a wiping means under the screen mask for wiping the cream solder adhering to the back surface of the screen mask, and also under the screen mask for the screen mask. A screen mask cleaning device is composed of a suction means for sucking the cream solder in the pattern hole opened in the mask and a reciprocating means for integrally reciprocating the wiping means and the suction means in the horizontal direction. Therefore, the cream solder adhering to the back surface of the screen mask can be wiped off by the wiping means, and the cream solder inside the pattern holes opened in the screen mask can be sucked by the suction means, so that the screen mask can be cleaned better. You can

[Brief description of drawings]

FIG. 1 is a side view of a screen mask cleaning device according to the present invention.

FIG. 2 is a sectional view of a screen mask used in the apparatus.

FIG. 3 is a perspective view of the main part of the device.

FIG. 4 is a cross-sectional view of the main part of the device.

FIG. 5 is a side view of a conventional screen mask cleaning device.

[Explanation of symbols]

 1 Screen Mask 2 Wiping Means 3 Wiping Means 5 Suction Means 6 Pattern Holes 7 Cream Solder 7'Cream Solder M Reciprocating Moving Means

Claims (1)

[Claims] 1. A wiping means for wiping off cream solder adhering to the back surface of the screen mask below the screen mask, and a pattern hole formed in the screen mask below the screen mask. 2. A screen mask cleaning device comprising: a suction means for sucking the cream solder, and a reciprocating movement means for integrally reciprocating the wiping means and the suction means in the horizontal direction.