KR20030066827A - Printer and Printing Method of Paste For Display Device - Google Patents

Abstract

PURPOSE: A paste printing apparatus is provided to achieve improved print quality by preventing a deformation of the mask and maintaining a printing width constant. CONSTITUTION: A paste printing apparatus comprises a mask(2) having a predetermined pattern; a squeegee(1) disposed at one surface of the mask; a cleaning sheet(6) disposed at the other surface of the mask, and which removes foreign substances from the mask; a feed unit(8) for feeding the cleaning sheet; a support unit(7) which cooperates with the squeegee to permit the cleaning sheet fed from the feed unit to tightly contact the mask, and moves from an end to the other end of the mask; and a recovery unit(9) for recovering the cleaning sheet stained with foreign substances. The squeegee has an ultrasonic oscillator(13) attached thereto.

Description

Paste Printing Device for Display Device {Printer and Printing Method of Paste For Display Device}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paste printing apparatus which is a plasma display panel (PDP) manufacturing equipment, and more particularly, to a mask cleaning of a paste printing apparatus for a display apparatus, which effectively removes foreign matter adhering to a mask mesh partition.

1 shows an apparatus related to mask cleaning in a paste printing apparatus which is a conventional plasma display panel (PDP) manufacturing apparatus.

Conventionally, the mask cleaning process in a paste printing apparatus, which is a plasma display panel (PDP) manufacturing apparatus, is as follows.

In FIG. 1, first, the squeegee 1 positioned in the upper portion of the mask 2 is advanced to the front end, and the supporting portion 7 positioned in the lower portion of the mask 2 is supplied from the supply portion 8. Advance to the front end by pushing and stay in standby.

As shown in FIG. 2, the squeegee 2 advanced to the front end presses the upper end of the mask 2 while descending, and at this time, the support 7 located under the mask 2 pushes the pushed-up clean paper 6. The upper end of the mask 2 is placed on the same position as the squeegee 1 held down.

When the squeegee 1 holding the upper end of the mask 2 starts to move to the rear end, the support 7 is in close contact with the squeegee 1 moving to the rear end and moves together at the same speed. The clean paper 6 in (7) cleans the lower surface of the mask.

In FIG. 3, when the support part 7 pushes the clinch paper 6 forward and advances, the supply part 8 which supplies the clinch paper 6 rotates counterclockwise to continuously rotate the clinch paper 6. When the support portion 7 is advanced to the front end and stops on the same position as the squeegee 1, the supply portion 8 stops the supply of the clean paper 6.

Then, when the squeegee 1 pressing the upper end of the mask 2 and the supporting part 7 positioned at the lower end of the mask 2 are closely attached to each other and move in a straight line movement, the recovery part 9 of FIG. 3 moves clockwise. While driving, the lower end of the mask 2 is cleaned while being wound at a constant speed so that the clean paper 6 in which the foreign matter of the mask 2 is stuck does not sag to the lower end.

However, in the mask cleaning process as described above, as shown in FIG. 7, the hardened or hardened foreign matter 12 existing in the barrier ribs of the mask mash 10 existing on the upper surface of the mask is not cleaned, but only the mask 2. ) Only the foreign matter present on the lower surface is cleaned by the clean paper 6, thereby degrading the cleaning effect of the mask.

In addition, even when the squeegee 1 presses and pastes the paste 12 supplied to the upper portion of the mask 2 at a constant pressure, the upper surface of the mask may be caused by the interference of the foreign matter 11 hardened by the mask mesh partition 10 of FIG. 7. The supplied paste 12 does not fall downward by an amount proportional to the volume of the foreign matter 11 adhering to the partition wall of the mask mash 10.

As described above, since the paste 12 supplied to the upper portion of the mask 2 does not fall to the lower portion in an amount proportional to the volume of the foreign matter 11 attached to the mask mesh 10 partition wall, the amount of the paste 12 falling to the lower portion is one It will not be stationary.

The line width becomes inconsistent after printing with the non-constant amount of paste 12, and thus the printing uniformity is lowered.

In addition, in FIG. 7, when the squeegee 1 supplies the paste 12 while the squeegee 1 applies a constant pressure, the foreign matter 11 hardened on the barrier ribs of the mask mash 10 is lowered. Pressure is applied in the transverse direction by the paste 12 to exit.

As a result, the adjacent normal mask mash 10 is also affected, so that the mask mash 10 has a problem that secondary deformation is caused by the foreign matter 11 as a whole.

Accordingly, an object of the present invention is to solve a conventional problem, and in cleaning a mask used in a paste printing apparatus which is a plasma display panel (PDP) manufacturing equipment, the mask cleaning effect is improved in response to foreign matter on the mask surface. The purpose is to.

1 is a view showing an apparatus related to mask cleaning in a paste printing apparatus which is a plasma display panel (PDP) manufacturing apparatus according to the prior art.

Figure 2 is a view showing a state in which the squeegee and the support is in close contact with the mask according to the prior art.

3 is a view showing a state in which mask cleaning is performed according to the prior art.

Figure 4 is a view showing a mask of the paste printing apparatus as a plasma display panel (PDP) manufacturing equipment.

FIG. 5 is a diagram illustrating a mask mesh at an upper end of a mask of a paste printing apparatus as a plasma display panel (PDP) manufacturing apparatus. FIG.

6 is a perspective view of a mask mesh at an upper end of a mask of a paste printing apparatus as a plasma display panel (PDP) manufacturing apparatus.

FIG. 7 is a view illustrating a state in which foreign matter adheres to a mask mesh partition wall at an upper end of a mask of a paste printing apparatus as a plasma display panel (PDP) manufacturing apparatus. FIG.

8 is a view showing an apparatus related to mask cleaning in a paste printing apparatus which is a plasma display panel (PDP) manufacturing apparatus according to the present invention.

9 is a view showing that the foreign matter adhering to the mask mesh partition wall at the upper end of the mask of the paste printing apparatus of the plasma display panel (PDP) manufacturing equipment according to the present invention is removed.

FIG. 10 is a view showing a state in which foreign matter adhering to a mask mesh partition wall at an upper end of a mask of a paste printing apparatus as a plasma display panel (PDP) manufacturing apparatus is buried in a clean paper and recovered to a recovery unit according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

1: squeegee 2: mask

6: Clutch 7: support

8: Supply department 9: Collection unit

10: mask mash 11: foreign substance

12: Paste 13: Ultrasonic oscillator

The present invention for achieving the above object, the configuration of the present invention, a mask having a predetermined pattern, squeegee disposed on one side of the mask both sides, disposed on the other side of the both sides of the mask for removing foreign matter of the mask A mark including a clean paper, a supply part for supplying the clean paper, a support part in close contact with the mask along with the squeegee, and a recovery part for recovering the clean paper with foreign matters; An apparatus paste printing apparatus, characterized in that an ultrasonic oscillator is attached to the squeegee.

Hereinafter, with reference to the accompanying drawings, the present invention to achieve the above object will be described in detail.

The present invention is to effectively remove the foreign matter adhering to the mask mesh partition wall, to eliminate the deformation of the mask and to improve the quality of printing.

Therefore, in order to remove the foreign matter 11 adhered to the mask mesh 10 partition wall as shown in Figure 7, in the present invention, an ultrasonic oscillator is mounted on the front end of the squeegee.

When cleaning the mask, the ultrasonic wave oscillator mounted on the front end of the squeegee oscillates a certain ultrasonic wave at the upper end of the mask to destroy foreign substances adhering to the mask mesh partition and separates it from the mask mesh partition, thereby improving the cleaning power of the mask and adhering to the mask partition. It is possible to improve the print quality by keeping the print width constant while preventing mask deformation caused by foreign matter in advance.

8 shows an apparatus related to mask cleaning in a paste printing apparatus which is a plasma display panel (PDP) manufacturing apparatus according to the present invention.

The cleaning process of the mask in the paste printing apparatus which is a plasma display panel (PDP) manufacturing apparatus according to the present invention is as follows.

In FIG. 8, first, when the squeegee 1 located on the upper part of the mask 2 moves to the front end, the support part 7 located on the lower part of the mask 2 is supplied with the cleansing paper 6 supplied from the supply part 8. Drag and move up to the same position as the squeegee 1 moved forward.

At this time, the supply part 8 is a cleaning paper 6 at a constant speed until the squeegee 1 located on the mask 2 and the support part 7 located on the lower part of the mask 2 are completed and come to a predetermined position. ) Is continuously supplied, and the recovery section 9 remains stopped while the cleansing paper 6 is supplied from the supply section 8.

After the squeegee 1 and the support 7 come to a predetermined position, the squeegee 2 descends and presses the upper end of the mask 2 while the support 7 located below the mask 2 is pushed on. The clean paper 6 is placed on the same position as the squeegee 1 holding the upper end of the mask 2.

When the squeegee 1 holding the upper end of the mask 2 starts to move to the rear end, the support 7 is in close contact with the squeegee 1 moving to the rear end and moves together at the same speed. The clean paper 6 in the support 7 cleans the lower end of the mask 2.

When the squeegee 1 moves in close contact with the support 7, the ultrasonic oscillator 13 mounted at the front end of the squeegee 1 oscillates ultrasonic waves and continuously irradiates the upper end of the mask.

As shown in FIG. 9, the ultrasonic oscillator 13 mounted at the front end of the squeegee 1 oscillates ultrasonic waves on the upper surface of the mask 2 so that the foreign matter attached to the mask mesh 10 partition wall on the upper surface of the mask 2. Destroy 10 and the destroyed foreign matter 11 will fall on the top of the clean paper (6).

When the squeegee 1 and the support 7 move synchronously for cleaning the mask 2 and the ultrasonic wave is oscillated in the ultrasonic oscillator 13 mounted at the front end of the squeegee 1, the supply part 8 ) Is kept stationary and the recovery unit 9 is driven clockwise as shown in FIG. 10 so that the clean paper 6 in which the foreign matters of the mask 2 are buried is not drooped at the lower end thereof.

When the cleaning is completed, the ultrasonic oscillator 13 stops the ultrasonic oscillation and the squeegee 1 is raised.

Therefore, according to the present invention, by attaching the ultrasonic oscillator to the squeegee, it effectively removes the paste cured in the mask hole, the high-viscosity paste on the mask hole, and the foreign matter adversely affecting the printing, thereby maintaining the frictional force between the mask and the squeegee at a constant condition. Can be.

In addition, there is an effect of improving productivity by improving paste omission property, which is a property of the paste leaving the mask hole after mask cleaning, preventing unnecessary mask cleaning, extending mask life, and reducing time due to mask replacement. .

Claims (1)

A mask having a predetermined pattern, a squeegee disposed on one side of both sides of the mask, a squeegee disposed on the other side of both sides of the mask to remove foreign substances in the mask, a supply unit for supplying the clean paper, and a squeegee supplied by the supply unit. In the paste printing apparatus for a display device comprising a support portion in close contact with the mask and linear movement from one end of the mask to the other end and a recovery unit for collecting the clean paper with foreign matter, And an ultrasonic oscillator attached to the squeegee.