JP2001038886A - Screen printing machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The cleaner paper used for cleaning the back surface of the screen can be rewound and reused without stopping the equipment during continuous production, and the operating rate during continuous production and the changeover during setup change can be achieved. An object of the present invention is to provide a screen printing machine having a function of preventing a decrease in work efficiency. SOLUTION: When a cleaner paper wound in a certain direction is detected during continuous production, the cleaner paper is automatically rewound without stopping the error of the equipment, and also automatically when the setup is changed. Is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing machine.

[0002]

2. Description of the Related Art A conventional screen printing machine will be described with reference to FIGS. 2 to 6 showing a screen printing machine and FIG. 7 showing a cleaner method. As shown in the figure, the printed circuit board 1 is carried into the table 2 from the previous process, and after rising to the back surface of the screen 3, the skis 4 are moved rightward, the cream solder 6 is filled from the screen opening 7 and the table 2 is removed. By lowering, the solder paste 6 is printed on the printed circuit board 1. The printed printed circuit board 1 is carried out to a subsequent process. The next print substrate 1 is carried in, and printing is performed by moving the skis 5 to the left. If the printing is repeated continuously, a phenomenon occurs in which the cream solder 6 adheres to the back surface of the screen 3 in the cream solder printing method. Will be issued.

Therefore, the cleaner unit 8 moves from the rear at regular intervals to remove the attached cream solder. Cleaner unit 8
Is the cleaning needle 9 rising in the designated section on the back of the screen.
And a suction unit 14 connected to the cleaner nozzle 9, a cleaner head 10 and a cleaner head sandwiched between the rear surface of the screen and the cleaner nozzle 9.
It comprises a motor 11 for winding up the motor 10, and a motor 12 for applying tension to the cleaner chamber 10 at the time of cleaning. The cleaner operation is performed by moving the cleaner unit 9 upward while simultaneously moving the cleaner unit 9 in the designated section while moving the cleaner unit from the rear to the front, pressing the cleaner unit against the screen back surface. The attached cream solder 6 is sucked and wiped off.

[0004] Since the cleaner wafer in the portion where the cleaner nano 9 comes into contact has the wiped-off solder, the motor 12 is made free at the end position of the designated section, and the motor 11 is rotated in the normal direction, so that the cleaner wafer is rotated.
Take up 10 and perform the same operation at the next cleaner. Motor 1
The sensor 1 and the motor 12 are provided with a sensor 13 for detecting the remaining amount of the cleaner chamber 10.

Next, the operation will be described with reference to FIG. In step 1, the printed circuit board 1 is loaded and the position is adjusted. At step 2, after the table 2 moves up, the printing operation is performed. When the number of prints reaches M in step # 3, the cleaner operation on the back surface of the screen is performed in step # 4. After the cleaner operation is completed in step 5, the cleaner is wound up. If it is detected by the sensor 13 that the cleaning of the cleaner wafer 10 has been completed in step 6, an error is stopped. Printed circuit board 1 printed in step 7
Out.

[0006]

However, in the above configuration, the cleaner wafer cannot be used after a certain period of time because the cleaner wafer winds up in a fixed direction.
Either shut down the equipment and replace the cleaner wafer, or use the cleaner wafer once it has been used and the suction unit is used together with the suction unit during cleaning. Must be rewound and reset. For this reason, there has been a problem that the operation rate is reduced during continuous production and the work efficiency is reduced during setup change.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. Compared with the related art, a cleaner wafer used for cleaning the rear surface of a screen is rewound and reused without stopping the equipment during continuous production. It is an object of the present invention to provide a screen printing machine having a function of preventing an operation rate during continuous production and a reduction in work efficiency during setup change.

[0008]

In order to solve the above-mentioned problems, a screen printing machine according to the present invention, when detecting a cleaner wafer wound in a certain direction during continuous production, does not stop the cleaner without stopping the equipment. It is characterized by having a function of automatically rewinding the wafer and automatically rewinding during setup change.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in the claims of the present invention
If a cleaner wafer that has been wound in a certain direction is detected during continuous production, the cleaner wafer can be automatically rewound without stopping the equipment, and can be rewound automatically during setup changeover. In the same way
It is characterized by having a function capable of rewinding, and has an effect that it is possible to prevent a reduction in the operation rate during continuous production and the work efficiency during setup change.

A screen printing machine according to a first embodiment of the present invention will be described with reference to FIG. In the drawings, the same components are denoted by the same reference numerals. In step # 3 and step # 6, the number M of cleaner intervals and the number N of rewinding after cleaning of the cleaner for reuse are set in advance.

Steps 1 to 5 are the same as in the conventional example. When the sensor 13 detects that the cleaning of the cleaner wafer 10 has been completed at step 6, the process proceeds to step 8 to rewind the cleaner wafer. With the motor 11 free, the motor 12 is reversed until the sensor attached to the motor 11 responds. In step 9, when the number of reuses of the cleaner wafer reaches the set value, the equipment is stopped with an error.

Similarly, at the time of setup change or manual operation, it is also possible to independently specify the cleaning / rewinding operation of the cleaner wafer.

[0013]

As described above, according to the embodiment of the screen printing machine of the present invention, when the cleaner is wound in a certain direction during the cleaner operation during the continuous production,
It can be reused by automatically rewinding the cleaner wafer without stopping the equipment without error, and it can also be automatically rewound during setup changeover, reducing the operation rate during continuous production and the work efficiency during setup changeover. It is possible to prevent a decrease.

[Brief description of the drawings]

FIG. 1 is an operation flowchart of a screen printing machine according to an embodiment of the present invention.

FIG. 2 is a plan view of a cleaner showing the present invention and a conventional example.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a plan view of a main part showing the present invention and a conventional example.

FIG. 5 is a front view of FIG. 4;

FIG. 6 is an overall perspective view of a screen printing machine showing the present invention and a conventional example.

FIG. 7 is an operation flowchart showing a conventional screen printing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 Table 3 Screen 4 Skis 5 Skis 6 Solder 7 Screen opening 8 Cleaner unit 9 Cleaner table 10 Cleaner 11, 12 Cleaner winding motor

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaya Matsumoto 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F-term (reference) 2C035 AA06 FD29 2C250 FA06 FB14 5E319 BB05 CD29 GG15

Claims (3)

[Claims] 1. During continuous production, when the end of a cleaner wafer wound up in a certain direction is detected at the time of cleaning on the back surface of the screen, the cleaner wafer is automatically rewound without stopping the equipment in error, and when the setup is changed. A screen printing machine characterized in that it has a function of automatically rewinding the screen. 2. A screen printing machine having a function of using a predetermined amount of a wafer at the time of cleaning the back surface of a screen, winding up and down, and rewinding. 3. A cleaning method having a function of using a fixed amount of a wafer at the time of cleaning on the back surface of the screen, winding up and down, and rewinding.