JPH03218834A - Squeegee jump correction device of automatic printing screen - Google Patents

Abstract

PURPOSE:To make it possible to correct the print of only a screen where a squeegee jump occurs by performing the descending action and ascending action of the screen and the scanning of the screen using a squeegee sequentially without an intermittent cloth feed, if 'no difference data' is interpreted after comparison of image patterns before and after the contact of the screen with cloth. CONSTITUTION:A squeegee jump correction device 7 consists of a memory unit which stores the image pattern of a TV camera 17, a processing device CPU 19 which obtains a difference between an image pattern before the contact of a screen 4 with cloth and that after the contact, and a control device 20 which activates the ascending action of the screen 4 stepwise using a screen lifting device 5. If a processing device 19 interprets the status as 'no difference data' at least in a single screen, that is, if the squeegee 6 does not work as a whole or partly, the control device 20 becomes activated, then the screen descends using a screen lifting device 5, and the screen 4 ascends after the formation of a printed pattern on cloth 1 due to the scanning of the squeegee 6 of the screen 4.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a cage jump correction device for an automatic screen printing machine, and more specifically, a device for correcting the cage jump in an automatic screen printing machine when all or a part of the cages do not operate. The present invention relates to a cage jump correction device capable of correcting defects.

(Prior Art) An automatic screen printing machine includes a conveying means for intermittently transporting fabric to a printing work area, one or more screens provided above the printing work area, and a screen that brings the fabric into contact with the screen during printing. In addition, it consists of a screen lifting means that separates the fabric from the screen during non-printing, and a screen that scans the screen, and various colored pastes are placed on the screen.
Intermittent feeding of the fabric by the conveying means and lowering of the screen by the screen lifting means. Scanning the scale. The raising of the screen by the screen raising means is regarded as one cycle and is operated continuously to print a pattern on the fabric.

(Problem to be solved by the invention) However, in the conventional automatic screen printing machine,
If all or part of the scourge does not operate due to various reasons, the scourge may jump and only the corresponding part of the screen will not be printed. However, as mentioned above, since the VT is continuous, even if the worker discovers that the scourge is skipped, it can be corrected. There is a problem in that there are a large number of processing defects because the process is completely interrupted and is handled as a short product, and it is not possible to make corrections in the post-process.

The present invention has been made in view of the above-mentioned problems, and includes:
To provide a simple and efficient screen jump correction device for an automatic screen textile printing machine capable of correcting printing only on a screen where a screen jump occurs when all or part of the screens do not operate.

(Means for Solving the Problems) The above-mentioned objects are: - A conveying means for intermittently transporting the fabric to the printing work area; one or more screens provided above the printing work area; It consists of a screen elevating means that brings the fabric and the screen into contact and separates the fabric and the screen during non-printing, and a screen that scans the screen. The descent of. Scanning of the above scale. In an automatic screen printing machine that prints a pattern on the fabric with one cycle of raising the screen by the screen lifting means, there is a TV camera that images each printing pattern on the fabric below the screen; a storage means for storing image patterns of the TV camera before and after the screen contacts the fabric; a processing device for comparing the image patterns before and after the screen contacts the fabric to obtain difference data; If it is determined that there is no difference data, the screen is lowered by the screen lifting means. - By the scourge jump correction device 1 for an automatic screen textile printing machine, the scourge jump correction device 1 for an automatic screen textile printing machine is characterized in that it comprises a control means for sequentially operating the scage scanning of the screen determined to have no difference data and the operation of raising the screen by the screen elevating means. Achieved. (Function) Since the present invention is configured as described above, if all or part of the screen does not operate, there is no difference in the printing pattern on the fabric below the screen before and after the screen contacts the fabric. It will be determined that there is no data.

If it is determined that there is no difference data, the control means moves the lower part of the screen without intermittent feeding of the fabric by the conveying means. Scanning of the screen that was determined to have no difference data. The screen rises sequentially, so
This makes it possible to correct the printing only on the screen where the skipping occurred. (Example) Next, the present invention will be explained in detail based on an example.

FIG. 1 is a diagram showing the entire automatic screen printing machine, which includes a transport mechanism (3) for intermittently transporting the fabric (1) to the printing work area (2), and a transport mechanism (3) for intermittently transporting the fabric (1) to the printing work area (2). 2) three screens (4) provided above;
During printing, the above fabric (1) and the above screen (4) are used.
a screen lifting mechanism (5) that brings the fabric (1) and the screen (4) into contact with each other and separates the fabric (1) and the screen (4) during non-printing, a screen (6) that scans the screen (4), and all or part of the screen. (6) is not activated, the cage jump correction device (7) is activated.

The conveyance mechanism (3) includes a first drive roller (10) driven by a DC motor (9) via a reduction gear (8), and a first drive roller (10) driven by a DC motor (12) via a reduction gear (11). 2 drive roller (13) and the first drive roller (1
0) and an endless belt (14) stretched between the second drive roller (l3).

The screen lifting mechanism (5) is connected to the screen (4).
It consists of an elevating frame (15) that allows the fabric (1) to move up and down so as to be able to approach and separate from the fabric (1), and a drive mechanism (16) that operates this elevating frame (15).

The above-mentioned scage jump correction device (7) includes the above-mentioned screen (
Three TV cameras (1) each image the printing pattern on the fabric (1) below each screen (4).
7), a memory (18) for storing image patterns of the TV camera (17) before and after the screen (4) contacts the fabric (1);
1) A processing unit (CPU) (19) that compares video patterns before and after contact with the screen to obtain difference data, and when the processing unit (19) determines that there is no difference data on at least one screen (4). The screen above is up! Lowering of the screen (4) by Ill structure (5). The screen frame (4) that was determined to have no difference data (
6) and control means (20) for sequentially operating the scanning operation and the raising operation of the screen (4) by the screen raising/lowering mechanism (5).

Also, the TV camera (17) and the processing device (19).
Control device (20) and reducer (8). Control device (20) and reduction gear (11). Control device (20) and drive mechanism (16
), the cage operating mechanism (not shown) that operates the control device (20) and the cage (6) are each connected to a circuit (double-dashed line).
connected with.

Next, the operating state of the screen skip correction device of the automatic screen printing machine constructed as described above will be explained with reference to the flowchart shown in FIG.

First, the fabric (1) attached to the endless belt (14)
) are the first drive roll (10) and the second drive roll (13).
It is intermittently fed by the rotation of 1 pitch (Stenop St). At that time, the stamp marks below each screen (4) are imaged by the TV camera (17) (Stenop S2).
, the respective video patterns are stored in the memory (18) (step s3). Next, the screen elevating mechanism (5) is activated to lower the screen (4), a printing pattern is formed on the fabric (1) by the scanning of the screen (6), and then the screen is lowered by the operation of the screen elevating mechanism (5). (4)
increases (printing process, Stenop S4). The stamp pattern below each screen (4) at that time is the TV camera (17)
(step S5), and each image pattern is stored in the memory (18) (step S6).

Therefore, the lower image pattern of each screen (4) already stored in the memory (18) by the stenop s3,
The image pattern below each screen (4) stored in the memory (l8) by the steno knob s6 is input to the processing device (19) (stenop s7), and the processing device (19) displays both patterns for each screen (4). Compare and find difference data (
Stenop s8). When the processing device (19) determines that there is difference data on all screens (4), that is, when all the screens (6) operate normally, the stenops
Return to 1.

The processing device (19) also includes at least one screen (
If it is determined that there is no difference data in step 4), that is, if all or part of the screen (6) does not operate, the control mechanism (20) operates and the screen lifting mechanism (5) moves the screen (4). The screen (4) is lowered, and the printing pattern is formed on the fabric (1) by scanning C of the screen (6) of the screen (4), which has been determined to have no difference data, and then the screen (4) is raised by the screen lifting mechanism (5). (Modified textile printing process. Stesop S9). At that time, the seal pattern at the bottom of the screen (4), which was determined to have no difference data, was shown by the TV camera (1
7) are each imaged (step SIO), and each image pattern is stored in the memory (18) (step SIO).
11).

Therefore, the lower image pattern of each screen (4) already stored in the memory (18) by the stenop S6,
The lower image pattern of each screen (4) stored in the memory (l8) by the stenop Sll is input to the processing bag holder (19) (stenop S]2), and the processing device (l9) processes the image pattern for each screen (4). Difference data is obtained by comparing both butters (Step S13). When the processing device (19) determines that there is difference data in all the corrected screens (4), that is, when all the screens operate normally in the corrected textile printing process 6, the process returns to step S1.
The processing device (19) is connected to at least one screen (4)
If it is determined that there is no difference data, that is, if all or part of the screen did not operate in the corrected textile printing process, the process returns to Stenop S9. In addition, in the example, the correction was repeated infinitely, but 1
It goes without saying that the machine may be configured to stop if the relevant scage does not operate even after repeated adjustments. (Effects of the Invention) As described in detail above, according to the present invention, defects due to skipped cages are effectively prevented, resulting in a reduction in the defective rate, that is, an improvement in the yield.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of the device of the present invention, and FIG. 2 is a flowchart showing the operating state of the device of the present invention. Explanation of symbols (1)...Fabric, (2)...Printing work area. (3)・
...Conveyance mechanism, (4)...Screen, (5)...
Screen lifting mechanism, (6)...scage, (7)...surge jump correction device, (8)...reducer, (9)...DC motor, (10
)...First drive roller. (1)...Reducer, (12)...DC motor, (13)...Second drive roller, (14)...Endless belt,

Claims (1)

[Claims] 1) A conveying means for intermittently conveying the fabric to a printing work area;
one or more screens provided above the printing work area, a screen lifting means for bringing the fabric and the screen into contact during printing and separating the fabric and the screen during non-printing, and scanning the screen. An automatic screen that imprints a pattern on the fabric, with one cycle consisting of intermittent feeding of the fabric by the conveying means, lowering of the screen by the screen raising/lowering means, scanning of the screen, and raising of the screen by the screen raising/lowering means. In the textile printing machine, a TV camera that images each printing pattern on the fabric below the screen, a storage means that stores the image patterns of the TV camera before and after the screen comes into contact with the fabric, and a storage device that stores the image patterns of the TV camera before and after the screen comes into contact with the fabric. a processing device for comparing front and rear video patterns to obtain difference data; and when the processing device determines that there is no difference data in at least one screen, the screen is lowered by the screen lifting means, and it is determined that there is no difference data. A cage skip correction device for an automatic screen textile printing machine, characterized in that it comprises a control means for sequentially operating the scanning of the screen cage and the operation of raising the screen by the screen raising/lowering means.