KR100424645B1 - Cleaning Device for Bottom Face of Screen Mask - Google Patents

Abstract

In the case of printing a pattern using a screen mask, a plate-shaped squeeze member formed of a synthetic resin or rubber material having a predetermined elasticity in order to easily remove the paste residues remaining on the bottom surface of the screen mask with a simple structure. And a support member for supporting the squeeze member and being movable in two or three axes, a blade mechanism installed in the longitudinal direction of the squeeze member and removing paste residues from the squeeze member, and a support member. And a collecting plate which is installed integrally and inclined downward toward the squeeze member side to collect paste residues removed by the squeeze member and the blade mechanism into one place.

Description

Cleaning Device for Bottom Face of Screen Mask}

The present invention relates to a cleaning apparatus for the lower surface of the screen mask, and more particularly, in the case of printing a pattern using the screen mask, the residue of the paste remaining on the lower surface of the screen mask can be easily removed with a simple structure using a squeeze member. The screen mask is related to the cleaning device.

In general, a screen mask is a mechanism used for screen printing. The screen mask is made of a metal network and is mainly used for printing a circuit pattern, a partition of a plasma display panel (PDP), a phosphor, and the like.

In the screen printing, the pattern corresponding to the pattern to be printed on the screen mask is formed into an emulsion (photosensitive agent), the paste for forming the pattern is applied to the screen mask, and then the extrusion force is applied to the paste with squeegee rubber. The paste applied to the portion where the emulsion is not formed is added through the screen mask so as to be printed on the printed object.

In the screen printing as described above, a portion of the paste passed downward by the extrusion force of the squeeze rubber remains on the lower surface of the screen mask without being printed on the printed object, so that the removal of the paste residue is printed during the next printing. This is very important because it can increase the quality. That is, when printing is performed again while the paste residues remain on the bottom surface of the screen mask, the paste residues are also printed, which seriously affects the print quality.

Therefore, various methods for removing paste residues remaining on the lower surface of the screen mask have been proposed.

The apparatus for removing the paste residues remaining on the lower surface of the conventional screen mask, as shown in Figure 1, the film 7 or cloth (not shown) across the feed roller 2, the take-out roller 4, the recovery roller (6) The screen mask 8 with the squeeze rubber 9 to print, and then the withdrawal roller 4 moves forward to position the film 7 close to the screen mask 8, and then to the squeeze rubber. (9) and the cleaning roller (5) installed on the lower surface side of the screen mask (8) while applying the pressure while the remaining residue on the screen mask (8) is made to bury the film to remove.

When the operation for removing the paste residues is completed as described above, the withdrawal roller 4 retreats to stand by in an area where it does not interfere with the screen mask 8, and the recovery roller 6 is operated so that the paste residues of the film 7 Recover the stained area.

The apparatus for removing paste residues remaining on the lower surface of the conventional screen mask 8 made as described above requires excessive replacement of the film 7 or cloth every time the printing is required.

In addition, the conventional apparatus has a limit on the amount of paste applied to the film 7 or cloth in a printing method with a large amount of paste discharged, so that it is difficult to sufficiently remove the paste residue.

In the conventional apparatus, the squeeze rubber (9) and the cleaning roller (5) are adhered to the top and bottom surfaces of the screen mask (8) to remove the residue of the paste, and thus the position and pressure of the squeeze rubber (9) and the cleaning roller (5). It is very difficult to adjust to fit, and a part of the film 7 sticks to the screen mask 8 and closes a hole of a pattern part, and the screen mask 8 may be damaged.

In addition, the conventional device is complicated in structure, requires a lot of installation space, there is an inconvenience to replace the film (7) on a regular basis, supply the film (7) and squeeze rubber (9) and cleaning roller (5) ) Is pressed and then the process of recovering the film 7 takes a long working time and productivity is lowered.

An object of the present invention is to solve the above problems, the structure is simple, requires less installation space, it is possible to use for a long time and the surface of the screen mask using a squeeze member so that the residue of the paste is sufficiently made In order to provide a cleaning device, a screen mask for removing the remaining paste residues is provided.

1 is a side cross-sectional view schematically showing an example of an apparatus for removing paste residues on a lower surface of a conventional screen mask,

2 is a perspective view showing an embodiment of a screen mask lower surface cleaning apparatus according to the present invention;

3 is a cross-sectional view showing a state in which paste residues on the bottom of the screen mask are removed using an embodiment of the screen mask lower surface cleaning apparatus according to the present invention;

4 is a cross-sectional view showing a state in which a paste residue on a squeeze member is removed using a blade mechanism in an embodiment of a screen mask lower surface cleaning apparatus according to the present invention;

5 is a partially enlarged perspective view illustrating a state in which a paste container is installed in an embodiment of a screen mask lower surface cleaning apparatus according to the present invention;

The screen mask cleaning apparatus proposed by the present invention includes a plate-shaped squeeze member formed of synthetic resin or rubber material having a predetermined elasticity, and a support for supporting the squeeze member and being movable in two or three axes. A member, a blade mechanism movably installed in the longitudinal direction of the squeeze member and removing paste residues on the squeeze member, and a paste integrally installed on the support member and removed by the squeeze member and the blade mechanism. It includes a collecting plate installed to be inclined downward toward the squeeze member side to collect the residue in one place.

The supporting member connects a pneumatic and hydraulic cylinder which can move in two or three axes, or connects a ball screw type linear movement mechanism or LM guide connected to a rotating device such as a motor.

One end of the collecting plate is provided with a paste container for discharging the paste residues to be collected.

Next, a preferred embodiment of the screen mask lower surface cleaning apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

First, an embodiment of the screen mask lower surface cleaning apparatus according to the present invention, as shown in Figure 2, supports the plate-shaped squeeze member 10 formed of a material having a predetermined elasticity, and the squeeze member 10 And a support member 12 installed to be movable in two axial directions, and a blade mechanism 20 installed to be movable in the longitudinal direction of the squeeze member 10 and removing paste residues from the squeeze member 10. And a collecting plate 30 integrally installed on the support member 12 and collecting paste residues removed by the squeeze member 10 and the blade mechanism 20 into one place.

The support member 12 is connected to a linear movement mechanism such as a pneumatic and hydraulic cylinder capable of moving in two axes, or an LM guide in which a motor capable of speed adjustment is installed.

For example, as shown in FIGS. 2 and 3, the support member 12 is fixedly installed with a pedestal 14 to which the rod 15 of the cylinder 16 is connected to move in the Z-axis direction. The bracket 19 supporting one cylinder 16 is fixedly mounted to the movable plate 13 which is installed to be movable in the X-axis direction.

The moving plate 13 is provided with an LM block 18 which is guided and moved by the LM rail 17 installed in the base frame 50.

The movement of the LM block 18 is configured to be driven as a motor (not shown) capable of speed adjustment in the feed direction to adjust the feed speed.

When the length of the squeeze member 10 is formed to have a length corresponding to the width or length of the screen mask 8, the movable plate 13 has a width corresponding to the width or length of the screen mask 8. The LM rail 17 and the LM block 18 are preferably formed at both corners for stable movement.

The pedestal 14, the cylinder 16, and the bracket 19 are supported by dividing the length of the support member 12 at predetermined intervals and installing about 2 to 6 (only one is shown in FIG. 2 as an example). It is preferable that the member 12 can be stably supported, as well as the operation of moving the squeeze member 10 up and down is made smoothly.

The cylinder 16 moves the support member 12 and the squeeze member 10 in the Z-axis direction to closely contact the squeeze member 10 supported by the support member 12 to the screen mask 8, The moving plate 13 supported by the LM block 18 moving along the LM rail 17 is a squeeze member for removing the paste residue while the squeeze member 10 is in close contact with the screen mask 8. Move (10) in the X-axis direction.

In the above description, the moving plate 13 is moved in the X-axis direction using a linear moving mechanism such as an LM guide. However, the moving plate 13 may be implemented using a hydraulic cylinder or a pneumatic cylinder.

The squeeze member 10 is formed using a synthetic resin such as urethane or the like having a predetermined elasticity, rubber or the like, and is formed in a length corresponding to the length or width of the screen mask 8 of the screen printing machine.

If the length of the squeeze member 10 is greater than or equal to the length or width of the screen mask 8, cleaning of the entire screen mask 8 is performed in one movement.

In addition, when the squeeze member 10 is formed smaller than the length or width of the screen mask 8, the squeeze member 10 must be moved two or more times to clean the entire screen mask 8.

In this case, it is necessary to provide moving means (movable means capable of moving in the X-axis, Y-axis, and Z-axis three-axis directions) for moving the squeeze member 10 in the Y-axis direction.

2 and 3, the squeeze member 10 is fixed so as not to be shaken by the support member 12. That is, the squeeze member 10 is inserted into and fixed to the groove formed in the support member 12, and a part of the squeeze member 10 is fixed to protrude.

The support member 12 is integrally fixed to the collection plate 30 to move together.

Although not shown in the drawing, the squeeze member 10 may be detachably fixed to the support member 12 by using a bolt or a small screw.

As shown in FIG. 5, at one end of the collection plate 30, a paste container 40 for discharging the paste residues to be collected is provided.

The collection plate 30 is preferably installed to be inclined so that the paste residues collected can be naturally collected toward the paste container 40.

In addition, the vertical wall of the collecting plate 30 is installed at a predetermined interval with the squeeze member 10 to prevent the residue of the paste removed from the screen mask 8 by the squeeze member 10 to flow out. It is desirable to prevent.

In addition, a blocking plate 34 is installed on the end surface of the collecting plate 30 so that the collected paste residues may be temporarily stored without being immediately spilled.

The blocking plate 34 is provided with a hole through which the collected paste residue flows out.

The paste residue flowing out into the hole of the blocking plate 34 is collected by the paste container 40, and is configured to replace the paste container 40 when the paste container 40 is filled with the paste residue.

The paste container 40 is detachably installed on the collecting plate 30 using a bracket 42 or the like.

The paste container 40 is preferably installed at a position capable of confirming the extent to which the paste residues are filled, or providing an inspection window or the like.

As shown in FIGS. 2 and 4, the blade mechanism 20 is in contact with the top and side surfaces of the squeeze member 10 (left side as seen in FIGS. 2 and 4) to remove the paste residue 22. ), A fixing member 24 on which the blade 22 is installed, and a moving means for moving the fixing member 24.

As shown in FIGS. 2 and 4, the moving means includes an LM rail 26 mounted on the moving plate 13 and the fixing member 24 installed therein. It consists of an LM block 21 moving along.

The movement of the LM block 21 described above is driven by a motor (not shown) capable of speed adjustment in order to control the feed speed.

The blade mechanism 20 is preferably installed as a pair to remove the paste residue on the squeeze member 10 while moving from both sides to the center as shown in FIG. 2 because the time required for removal is reduced.

In the above description, the blade 22 is moved using a linear movement mechanism such as an LM guide. However, the blade 22 may be implemented using a pneumatic or hydraulic cylinder.

The blade 22 is made of a synthetic resin sheet such as Teflon sheet or polyethylene (PE) sheet or rubber sheet having good elasticity, and the thickness of the surface contacting the squeeze member 10 is about 0.3 to 0.5 mm. It is preferable that the simple configuration because it can be in contact with the squeeze member 10 at a constant pressure without a configuration for a separate pressure adjustment.

Next, a method of using the screen mask lower surface cleaning apparatus according to the present invention configured as described above will be described.

First, when the printing using the printing squeeze rubber and the screen mask 8 of the screen printer is completed, the cylinder 16 is operated to raise the support member 12 and the squeeze member 10 to squeeze as shown in FIG. 3. The upper surface of the member 10 is brought into contact with the lower surface of the screen mask 8.

As described above, the motor (not shown) of the LM block 18 installed on the bottom surface of the movable plate 13 is driven while the upper surface of the squeeze member 10 and the lower surface of the screen mask 8 are in contact with each other to drive the LM block ( 18 is moved along the LM rail 17 in the X-axis direction, and the support member 12 and the squeeze member 10 provided in the movable plate 13 move in the X-axis direction, The paste residue 1 remaining on the lower surface is removed. At this time, the paste residue 1 removed from the lower surface of the screen mask 8 moves along the collecting plate 30 and is collected in the paste container 40.

When the X-axis movement of the squeeze member 10 is completed in the above, the cylinder 16 is operated to lower the support member 12 and the squeeze member 10 to the position corresponding to the position of the blade 22 described above. The furnace squeeze member 10 moves, and as shown in FIG. 4, the motor (not shown) of the LM block 21 is driven so that the LM block 21 moves along the LM rail 26. One blade 22 is removed from the screen mask 8 remaining in the squeeze member 10 while moving in the longitudinal direction (Y-axis direction) of the squeeze member 10 while being in contact with the top and side surfaces of the squeeze member 10. The pasted paste residues. At this time, the residue of the paste removed from the squeeze member 10 is moved along the collecting plate 30 and collected in the paste container 40.

As described above, when the removal of the paste residue is completed, the blade mechanism 20 and the squeeze member 10 return to their original positions and stand by.

The blade mechanism 20 is installed so that the squeeze member 10 does not interfere with the squeeze member 10 in the process of removing the paste residue 1 remaining on the lower surface of the screen mask 8.

The process of removing the residue of the paste remaining on the squeeze member 10 by the blade mechanism 20 is advantageous in that the cycle time of the overall operation is very small if it is configured to be performed at the same time as the screen printing process.

In the above, a preferred embodiment of the screen mask cleaning apparatus according to the present invention has been described, but the present invention is not limited thereto, and various modifications can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. This also belongs to the scope of the present invention.

According to the screen mask cleaning device according to the present invention made as described above, the blade or squeeze member of the blade mechanism does not need to be replaced every time, and can be used repeatedly, so that the cost of consumables is higher than that of the conventional film or cloth. Since it is greatly reduced and does not use a film or cloth, the phenomenon that the pattern portion of the screen mask is clogged by the film or cloth does not occur.

In addition, according to the screen mask lower surface cleaning apparatus according to the present invention, since the squeeze member is in close contact with the lower surface of the screen mask and scrapes off the residue, it is possible to cleanly remove the paste residue even when the ejection amount of the paste is large.

According to the screen mask lower surface cleaning apparatus according to the present invention, since pressure is applied to the squeeze member only on the lower surface side, operation and pressure control are much easier than those of the conventional method of simultaneously applying pressure on the upper and lower surfaces of the screen mask.

In addition, according to the screen mask cleaning device according to the present invention, the structure is simple, requires less installation space, and productivity is improved.

Claims (5)

A plate-shaped squeeze member formed of a synthetic resin or rubber material having a predetermined elasticity; A support member supporting the squeeze member and installed to be movable in two or three axes; A blade mechanism installed to be movable in the longitudinal direction of the squeeze member and removing paste residues from the squeeze member; And The collecting plate which is integrally installed on the support member and installed inclined downward toward the squeeze member side to collect the paste residues removed by the squeeze member and the blade mechanism into one place. Screen cleaning device comprising a cleaning device. The method of claim 1, And a screen mask for cleaning the pneumatic and hydraulic cylinders or a linear moving mechanism to which a speed adjustable motor is installed. The method of claim 1, The squeeze member is a screen mask cleaning device formed by using a synthetic resin or rubber having a predetermined elasticity. The method of claim 1, One end surface of the collecting plate is provided with a blocking plate so that the collected paste residues can be temporarily stored without being immediately spilled. And a paste mask for discharging the paste residue collected at one end of the collecting plate on which the blocking plate is installed. The method of claim 1, The blade mechanism comprises a blade made of a synthetic resin sheet or rubber plate and in contact with the upper and side surfaces of the squeeze member to remove paste residues; A movable table on which the blade is installed; And Moving means consisting of a pneumatic or hydraulic cylinder for moving the moving table or a linear moving mechanism driven by a motor capable of speed adjustment. Screen cleaning device comprising a cleaning device.