KR20130128983A

KR20130128983A - Cleaning device for screen mask cleaner

Info

Publication number: KR20130128983A
Application number: KR1020120053243A
Authority: KR
Inventors: 박장환; 이영형; 박성우; 김용; 홍상기
Original assignee: 재성정밀주식회사; 한국섬유개발연구원
Priority date: 2012-05-18
Filing date: 2012-05-18
Publication date: 2013-11-27

Abstract

The present invention relates to a device for cleaning screen masks in a screen printing process of a PCB manufacturing process, which is capable of preventing the waste of resources and excessive expenses for supplies, and reducing environment treatment costs and solving environmental issues as solder attached to a screen mask cleaner made of woven fabric is efficiently removed by using ultrasonic waves and the cleaner can be reused to prevent the use of a large amount of paper cleaners or non-woven fabric.

Description

Cleaning Device For Screen Mask Cleaner}

The present invention relates to a screen mask cleaner cleaning apparatus for screen mask cleaning operation in a screen printing process of a PCB manufacturing process.

The screen printing machine supplies and applies solder paste to the surface of a substrate so as to be able to solder various components such as an integrated circuit element, a resistor, and a capacitor to a printed circuit board to form a predetermined wiring or a design pattern.

Such a screen printer has a structure in which a screen mask having pattern holes formed in a predetermined pattern is placed on the upper side of a work plate, a solder paste is supplied to the surface of the screen mask, and a solder paste Is pushed by the squeeze blade and printed on the solder surface on the printed circuit board through the pattern hole.

As the screen printing process is repeated, the solder paste remains in the pattern hole or the lower part of the screen mask, and if the paste is hardened or foreign matter is deposited, it becomes impossible to print the accurate pattern, so that the screen mask needs to be cleaned. The cleaning of the screen mask is performed by cleaning the solder paste remaining under the pattern holes of the screen mask by wiping the lower portion of the screen mask with the cleaner having the cleaning liquid put into the lower portion of the screen mask after the screen printing process is completed.

The cleaner used in the screen cleaning mainly uses paper cleaner (roll paper) or nonwoven fabric, and the used paper cleaner or nonwoven fabric can not be reused and can not be disposed of.

In the screen printing process of the PCB manufacturing process, a large amount of paper cleaner (roll paper) or nonwoven fabric is consumed at present for screen mask cleaning operation, resulting in waste of resources and excessive expenditure of consumables, as well as incineration or burial of contaminated consumables And the environmental treatment costs and environmental problems are caused by the treatment, and the necessity of the cleaner which can be used repeatedly is increasing day by day.

As such a usable cleaner, a knitted fabric may be recommended, but after using the knitted fabric as a cleaner for a knitted fabric, it is essential to wash or wash the knitted fabric with solder paste to reuse it. Therefore, in the present art, screen mask cleaners have an oily substance on the solder paste, unlike contaminants that are washed or washed with an appropriate detergent for cleaning the knitted fabric for cleaners or contaminants on general knitted fabric. There is a problem that the cleaning is not easy because a large amount of paste.

Therefore, the present invention provides a cleaning device for a screen mask cleaner which can remove oily materials and solder paste from the cleaner so as to be suitable for reuse of the screen mask cleaner by overcoming the problems of the conventional art. .

Therefore, according to the present invention, there is provided a screen mask cleaner comprising: a rewinder part for releasing a wound screen mask cleaner while adjusting tension;

An ultrasonic washing unit accommodating a cleaning liquid, the cleaning tank including a plurality of ultrasonic generators installed therein, a plurality of rollers for transporting the screen mask cleaner released from the rewinder unit, and a roller support unit supporting the rollers;

A dewatering unit comprising an air injection nozzle and a pressure roller for dewatering the cleaner for screen masks conveyed from the ultrasonic cleaning unit;

A thermal drying unit for thermally drying the screen mask cleaner transferred from the dewatering unit;

A tension adjuster for adjusting a tension of the screen mask cleaner transferred from the thermal drying unit; And

There is provided a cleaning device for a screen mask cleaner, including a winding unit for winding the screen mask cleaner passing through the tension control unit.

In addition, the ultrasonic generator installed in the washing tank of the ultrasonic washing unit preferably generates ultrasonic waves of 20 ~ 100 kHz.

In addition, it is preferable that the roller supporter of the ultrasonic washing unit may be moved to Shanghai to vary the interval of the ultrasonic generation period installed in the roller and the washing tank.

In addition, it is preferable that the roller support of the ultrasonic cleaning unit is moved up and down three to six times per minute.

Therefore, a large amount of paper cleaner (roll paper) or nonwoven fabric is made by reusing the knitted fabric cleaner by efficiently removing the solder attached to the screen mask cleaner made of the knitted fabric by the cleaning device for the screen mask cleaner of the present invention using ultrasonic waves. It is possible to avoid the waste of resources and the excessive expenditure of consumables by avoiding the use of, and to improve the environmental treatment cost and environmental problems caused by incineration or burial of contaminated consumables.

1 is a front configuration diagram for schematically illustrating the structure of an embodiment of a cleaning device for a screen mask cleaner of the present invention,
Figure 2 is a detailed view of the ultrasonic cleaning unit of the cleaning device for a screen mask cleaner of the present invention.
3 is a photomicrograph of a screen mask cleaner with a solder before cleaning by the cleaning device for a screen mask cleaner of the present invention,
4 is a photomicrograph of a screen mask cleaner from which solder is removed after cleaning by the screen mask cleaner cleaning apparatus of the present invention.

Hereinafter will be described in more detail with reference to the accompanying drawings, the cleaning device for a screen mask cleaner of the present invention.

As the cleaning device for the screen mask cleaner of the present invention is shown in FIG.

A rewinder part (10) for releasing the wound screen mask cleaner (100) while adjusting tension; A plurality of rollers 24 for transferring a screen mask cleaner released from the rewinder unit and a roller support 25 for supporting the rollers, and a plurality of ultrasonic generators 22, An ultrasonic cleaning unit 20; A dewatering unit 30 composed of an air injection nozzle 31 and a pressure roller 32 for dewatering the screen mask cleaner transferred from the ultrasonic cleaning unit; A thermal drying unit (40) for thermally drying the screen mask cleaner transferred from the dewatering unit; A tension adjusting unit 50 for adjusting the tension of the screen mask cleaner transferred from the thermal drying unit; And a winding unit 60 to wind the screen mask cleaner passing through the tension control unit.

The rewinder 10 is a device for releasing the wound screen-mask cleaner 100 and supplying it to the rollers 24 formed in the ultrasonic cleaning unit to be described later. The tension can be adjusted, and the ultrasonic- Thereby adjusting the tension of the screen mask cleaner. In the rewinder unit 10, the screen mask cleaner wound on the take-up unit 60 of the cleaning apparatus for a screen mask cleaner of the present invention to be described later is put under the screen mask to wipe out the solder and then mounted on the rewinder unit 10 And reuse it.

The ultrasonic cleaning unit 20 includes a cleaning tank 23 containing a cleaning liquid and provided with a plurality of ultrasonic generators 22 therein, a plurality of rollers 24 for transferring a screen mask cleaner released from the rinse portion, And a cleaner for the screen mask is immersed in the cleaning liquid to be cleaned by the detergent in the cleaning liquid and the ultrasonic wave.

The cleaning tank 23 accommodates a cleaning liquid containing detergent and a plurality of ultrasonic generators 22 are installed in the cleaning tank 23. The screen mask cleaner 100 is provided by a plurality of rollers 24 as shown in FIG. And the roller support 25 supporting the rollers is moved up and down The distance between the cleaner 100 for the screen mask and the ultrasonic generator 22 installed in the cleaning tank can be changed. The interval between the ultrasonic wave generating period and the cleaner for the screen mask can be adjusted according to the degree of contamination of the screen mask cleaner to obtain an optimal cleaning effect.

The ultrasonic generator may form a plurality of ultrasonic generators in the washing tank, and it is preferable to form 5 to 10 ultrasonic generators. It is preferable that the ultrasonic generator provided in the washing tank of the ultrasonic cleaning unit generates ultrasonic waves of 20 to 100 kHz because the solder attached to the screen mask cleaner can be effectively removed by the vibration of the ultrasonic waves. As the cleaning progresses, the cleaning liquid can be replenished through the cleaning liquid supply port 21 and drained through the drain port 26.

When the number of times of reuse of the screen mask cleaner increases, the roller support of the ultrasonic cleaning unit is moved up and down three to six times per minute, so that the screen mask cleaner moves up and down on the surface of the cleaning liquid in the cleaning tank, So that it is possible to improve the cleaning efficiency of the screen mask cleaner by using the impact with the water surface of the cleaning liquid in addition to the vibration of the ultrasonic wave.

The dewatering unit 30 is composed of an air injection nozzle 31 and a pressure roller 32. The dewatering unit 30 is provided with a screen mask cleaner which is completely cleaned and delivered from the ultrasonic cleaning unit 20, The remaining cleaning liquid is jetted out, and then is squirted by the pressure roller 32 to squeeze the cleaning liquid wetting the screen mask cleaner and perform dehydration.

The thermal drying unit 40 functions to heat the screen mask cleaner transferred from the dewatering unit to heat and dry the screen mask cleaner through a screen mask cleaner.

The tension adjuster 50 is constituted by a plurality of pairs of rollers. The tension adjuster 50 adjusts the tension while passing through the thermally dried screen mask cleaner, and supplies the adjusted tension to the winding unit 60 so that the screen mask cleaner finally reaches the winding unit 60 It will become cold.

The screen mask cleaner wound on the winding portion 60 is separated from the cleaning device of the present invention and is put under the screen mask for reuse so as to wipe the solder paste remaining under the screen mask to remove residual solder The paste is washed. The screen mask cleaner having been thus cleaned is mounted on the rwinder part 10 of the cleaning device for the screen mask cleaner of the present invention, is released, and is cleaned by the ultrasonic cleaning part 20 as described above. The solder (see FIG. 3) attached to the screen mask cleaner made of the knitted fabric is efficiently removed by using ultrasonic waves (see FIG. 4), thereby being separated from the washing apparatus and reused.

10: Rewinder section 20: Ultrasonic cleaning section
21: Cleaning liquid supply port 22: Ultrasonic generator
23: washing tank 24: roller
25: roller support 26: drain
30: Dewatering section 31: Air injection nozzle
32: pressure roller 40: thermal drying unit
41: Heating roller 50:
60: winding part 100: screen mask cleaner

Claims

A rewinder part for releasing the cleaned screen mask cleaner while adjusting the tension;
An ultrasonic cleaning unit including a cleaning tank accommodating a cleaning liquid, a plurality of rollers for transporting a screen mask cleaner released from the rewinder unit, and a roller supporter supporting the rollers;
A dewatering unit comprising an air injection nozzle and a pressure roller for dewatering the cleaner for screen masks conveyed from the ultrasonic cleaning unit;
A thermal drying unit for thermally drying the screen mask cleaner transferred from the dewatering unit;
A tension adjuster for adjusting a tension of the screen mask cleaner transferred from the thermal drying unit; And
And a winding unit for winding the screen mask cleaner passing through the tension control unit.

The method of claim 1,
The ultrasonic generator installed in the cleaning tank of the ultrasonic cleaning unit for cleaning the screen mask cleaner, characterized in that for generating an ultrasonic wave of 20 ~ 100㎑.

The method of claim 1,
The roller supporter of the ultrasonic cleaning unit may be moved to Shanghai to change the interval of the ultrasonic generation period installed in the roller and the cleaning tank.

The method of claim 1,
The ultrasonic cleaning unit The roller support is a cleaning device for the screen mask cleaner, characterized in that the vertical movement three to six times per minute.