JP2004195725A - Paste packing device for filling cartridge with ink or paste for screen printing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paste filling device capable of filling a cartridge with a defoamed ink or paste utilizing vacuum piping which supplies a negative pressure to a vacuum printing machine for screen printing under vacuum. <P>SOLUTION: This paste packing device is structured of a paste container 34 with a stirrer, installed inside a vacuum chamber 30 accommodating a screen printing machine; a cartridge container 40 with which a first guide pipe 39 connected with the paste container 34, is connected by leading the pipe 39 to the outside of the vacuum chamber 30, with which a second guide pipe 41 connected with the cartridge container 40 is connected, thus constituting a duct. In addition, on-off valves 42 and 43 which can be operated outside of the vacuum chamber 30, are fitted to the first and the second guide pipe 39 and 40. A cartridge 6 is accommodated inside the cartridge container 40 and the cartridge 6 is filled with the ink or paste contained inside the paste container 34. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a paste filling device for filling a cartridge with ink or paste used for screen printing.
[0002]
[Prior art]
Screen printing includes a method of performing printing in a vacuum. In this case, it is a condition that bubbles are not mixed in ink or paste. Further, in screen printing, it is well known that a cartridge filled with ink or paste is mounted on a printing machine for printing.
[0003]
FIG. 4 shows the structure of a squeegee head unit, a cartridge and a cartridge holder in a screen printing machine. The screen printing machine is provided with a squeegee head 2 that operates above the screen plate 1, and a pair of squeegees 4 are provided on a head substrate 3 of the squeegee head 2. In the illustrated structure, a pair of squeegees 4 are provided on the screen plate 1 so that the forward pass and the return pass can be used separately, and a supply nozzle 5 for supplying ink or paste is provided between the squeegees 4. . The cartridge 6 filled with ink or paste is accommodated in a cartridge holder 7 and mounted on the squeegee head 2.
[0004]
The cartridge 6 accommodates a supply joint 8 provided at the front end of the cartridge 6 so as to protrude from an opening 9 formed in the head of the cartridge holder 7, and one or two cartridges 6 are provided. The number of cartridge holders 7 accommodating the number of cartridges 6 is also provided. The supply joint 8 protruding from the opening 9 of the cartridge holder 7 is provided with a supply hose 10 connected to the supply nozzle 5. Reference numeral 11 denotes a holder cap that is screw-coupled to the base end of the cartridge holder 7, and has an air supply joint 12 that supplies pressurized air into the cartridge holder 7.
[0005]
When screen printing is performed in a vacuum as described above, it is a condition that no bubbles are mixed in the ink or the paste.Therefore, the cartridge filled with the ink or the paste should be defoamed before being mounted on the printing press. Need to be kept. FIG. 5 shows an ink or paste filling apparatus for a cartridge according to the prior art. The base end of the cartridge 6 is mounted on a top plate 21 of a paste tank 20, and a vacuum pump 22 is connected to the tip of the cartridge 6. The cartridge 6 is provided with a suction pipe 23 and the stop valve 24 is operated to fill the cartridge 6 with the paste 25 in the paste tank 20 from the injection pipe 26.
[0006]
Even when ink or paste is filled in the cartridge by the conventional method, bubbles are mixed in the paste in the tank because bubbles are mixed in the paste in the tank. For this reason, in the related art, there is a problem that defoaming of ink or paste is required as a pre-process for mounting the cartridge on the printing press, and the work efficiency is deteriorated by the time required for the pre-process. Also, in order to solve such inconvenience, it has been customary to order a defoamed cartridge from a manufacturer of ink or the like, but this method is more expensive than a normal charge. .
[0007]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide a paste filling device capable of filling a cartridge with ink or paste in a defoamed state using a vacuum pipe that supplies a negative pressure to a vacuum printer that performs screen printing in a vacuum. Things.
[0008]
[Means for Solving the Problems]
A first solution is that in a vacuum chamber in which a screen printer is accommodated, a paste container with a stirring device is provided in the vacuum chamber, and a first guide tube connected to the paste container is connected to the vacuum chamber. It is pulled out and connected to the cartridge container, the second guide tube connected to the cartridge container is connected to the vacuum chamber, the first and second guide tubes are provided with a valve for opening and closing, and the cartridge is placed in the cartridge container. The ink or paste contained in the paste container is filled in a cartridge.
According to a first aspect of the present invention, a paste container is provided outside a vacuum chamber, and an air port of the paste container is connected to the vacuum chamber.
[0009]
A second solution is to provide a paste container equipped with a stirrer in a second vacuum chamber installed separately from a vacuum chamber containing a printing machine, and connect the first guide tube connected to the paste container to the second vacuum chamber. Drawn out of the vacuum chamber and connected to a cartridge container, a second guide tube connected to the cartridge container is connected to the second vacuum chamber, and an opening / closing valve is provided in the first and second guide tubes. The cartridge is housed in the cartridge container, and the ink or paste in the paste container is filled in the cartridge.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
1 is a cross-sectional view illustrating a paste filling apparatus according to the present invention, FIG. 2 is a cross-sectional view illustrating a paste filling apparatus according to another embodiment of the present invention, and FIG. 3 is a cross section illustrating a paste filling apparatus according to another embodiment of the present invention. FIG.
[0011]
When screen printing is performed in a vacuum, the entire screen printing machine is housed in a vacuum chamber, but FIG. 1 shows a part of the vacuum chamber, and the screen printing machine is a squeegee head shown in FIG. Only part 2 is shown. In the figure, a vacuum pump 31 is connected to a vacuum chamber 30 via a directional switching valve 32, and the directional switching valve 32 is provided with an atmospheric discharge port 33. Switching between negative pressure and atmospheric pressure is possible.
[0012]
A paste container 34 is provided inside the vacuum chamber 30. The paste container 34 has an air inlet / outlet 35 formed therein, communicates with the vacuum chamber 30, and contains a paste 36 therein. The paste 36 is agitated by a reciprocating or oscillating motion of a stirring rod 37 for promoting defoaming by a stirring cylinder 38 to promote defoaming. In addition, a first guide tube 39 connected to the bottom of the paste container 34 is drawn out of the vacuum chamber 30. The first guide tube 39 is connected to a cartridge container 40, and a second guide tube 41 reaching the vacuum chamber 30 is connected to the cartridge container 40. The first guide tube 39 is provided with a first valve 42 outside the vacuum chamber 30, and the second guide tube 41 is provided with a second valve 43, both of which can be operated outside the vacuum chamber 30. It has become.
[0013]
The cartridge 6 is housed in the cartridge container 40, and the paste 36 of the paste container 34 is filled in the cartridge 6. The cartridge container 40 has a lid for taking in and out the cartridge 6, but since the negative pressure and the atmospheric pressure are supplied alternately by opening and closing the first and second valves 42 and 43, the lid is preferably a closed lid. When the cartridge 6 is stored, the inside is made airtight.
[0014]
Next, the procedure of the filling operation will be described. First, an empty cartridge 6 is stored in the cartridge container 40, and the first and second valves 42 and 43 are closed. Next, the inside of the vacuum chamber 30 is made negative pressure by the vacuum pump 31 in order to make the inside of the vacuum chamber 30 vacuum. At the same time, the stirring cylinder 38 is driven to reciprocate or oscillate the stirring rod 37 to remove bubbles from the paste 36 in the paste container 34 while facilitating the removal of bubbles. Printing is started in the vacuum chamber 30 in a negative pressure state, and at the same time, the second valve 43 is opened to make the inside of the cartridge container 40 a negative pressure. The second valve 43 is closed when the pressure in the cartridge container 40 becomes negative.
[0015]
When printing in the vacuum chamber 30 is completed, the inside of the chamber is opened to the atmosphere. When the inside of the chamber reaches atmospheric pressure, the first valve 41 is opened to fill the cartridge 6 with the paste 36 in the paste container 34. That is, since the inside of the cartridge container 40 is at a negative pressure and the inside of one of the vacuum chambers 30 is at the atmospheric pressure, a differential pressure is generated between the two by opening the first valve 42. The cartridge 36 is filled with the paste 36 therein. The opening time of the first valve 42 is set with a timer according to the filling amount of the paste.
[0016]
FIG. 2 shows another embodiment, in which the paste container 34 is installed outside the vacuum chamber 30. Here, the air inlet / outlet 35 of the paste container 34 is extended and connected to the vacuum chamber 30, but other configurations and operations are the same as those in FIG. However, since the paste container 34 is installed outside the vacuum chamber 30, refilling of the paste and maintenance and inspection of the container are easier than in the embodiment of FIG.
[0017]
FIG. 3 shows another embodiment, in which a paste container 34 is installed in a second vacuum chamber 50. The second vacuum chamber 50 is not provided with the vacuum printer but is provided independently. The paste container 34 is set inside the second vacuum chamber 50, the first guide tube 39 provided in the paste container 34 is drawn out of the second vacuum chamber 50, and the pipeline is connected to the cartridge container 40 and the second vacuum chamber 50. The configuration for returning to the second vacuum chamber 50 via the guide tube 41 is the same as that in FIG.
[0018]
In the embodiment of FIG. 3, the second vacuum chamber 50 is formed independently. However, unlike the embodiment of FIG. 1, the filling operation of the paste is not limited to the time of printing and can be performed at any time. I have.
[0019]
【The invention's effect】
The present invention is capable of filling a cartridge with ink or paste in a defoamed state using a vacuum pipe that supplies a negative pressure to a vacuum printer that performs screen printing in a vacuum, so that the ink filled in the cartridge or This eliminates the need for defoaming before mounting the paste on a printing machine, and eliminates the need to request a defoaming process from a manufacturer of ink or the like, so that cost reduction can be expected.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a paste filling device according to the present invention.
FIG. 2 is a sectional view showing a paste filling device according to another embodiment of the present invention.
FIG. 3 is a sectional view showing a paste filling apparatus according to another embodiment of the present invention.
FIG. 4A is a sectional view showing a squeegee head of the screen printing machine, and FIG. 4B is a perspective view showing a cartridge and a cartridge holder.
FIG. 5 is a cross-sectional view of a conventional paste filling apparatus.
[Explanation of symbols]
1 Screen Plate 2 Squeegee Head 3 Head Substrate 4 Squeegee 5 Supply Nozzle 6 Cartridge 7 Cartridge Holder 8 Supply Joint 9 Opening 10 Supply Hose 11 Holder Cap 12 Air Supply Joint 20 Paste Tank 21 Top Plate 22 Vacuum Pump 23 Suction Tube 24 Stop Valve 25 Paste 26 Injection tube 30 Vacuum chamber 31 Vacuum pump 32 Direction switching valve 33 Atmospheric discharge port 34 Paste container 35 Air port 36 Paste 37 Stir bar 38 Stir cylinder 39 First guide tube 40 Cartridge container 41 Second guide tube 42 First Valve 43 Second valve 50 Second vacuum chamber

Claims (4)

In a vacuum chamber in which a screen printing machine is housed, a paste container (34) is provided in a vacuum chamber (30), and a first guide tube connected to the paste container is drawn out of the vacuum chamber to form a cartridge container. (40), the second guide tube connected to the cartridge container is connected to the vacuum chamber, the first and second guide tubes are provided with an opening / closing valve, and the cartridge is accommodated in the cartridge container. A paste filling device, wherein the ink or paste in the paste container is filled into a cartridge. The paste filling device according to claim 1, wherein a paste container (34) is provided outside the vacuum chamber (30), and an air port (35) of the paste container is connected to the vacuum chamber. A paste container (34) is provided in a second vacuum chamber (50) provided separately from a vacuum chamber containing a printing machine, and a first guide tube connected to the paste container is provided outside the second vacuum chamber. Pulling out and connecting to the cartridge container (40), connecting the second guide tube connected to the cartridge container to the second vacuum chamber, providing the first and second guide tubes with an opening / closing valve, A paste filling device, wherein a cartridge is housed in a container and the cartridge is filled with ink or paste in the paste container. 4. The paste filling device according to claim 1, wherein the paste container (34) is provided with a stirring device inside.

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