KR970000079B1 - Space control device between screen mask and stage and horizontal control device of screen mask in pcb printing apparatus - Google Patents

Abstract

The apparatus is for controlling the screen mask parallel and the space gap between a screen mask and a stage fast and precisely. The apparatus comprises: a fixed frame(6) fixed on top of a body(1); a fixed mask frame holder(7) supporting the rear-one side edge of a mask frame(10); a moving mask frame holder(8) supporting the rear-other side and the front-both sides of the mask frame(10); several sensors(11) measuring the space gap between each edge of a screen mask(9) and a stage(5); and a controller(12) controlling the driving of a movement means and a servo motor(4). The apparatus has an effect to reduce the working time and to increase the accuracy.

Description

Screen Mask Parallelism of Circuit Board Copper Foil Printing Equipment and Spacer between Screen Mask and Stage

1 is a front view schematically showing a conventional device.

2 is a perspective view of a fixing frame constituting a conventional device.

3 is a plan view schematically showing the apparatus of the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

Fig. 5 is a main structural diagram showing a state in which the parallelism of the screen mask is adjusted by the apparatus of the present invention.

6 is a main component diagram showing a state in which the distance between the screen mask and the stage is adjusted by the apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: Main body 4: Servo motor

4: Stage 6: Fixed Spring

8: moving mask frame holder 9: screen mask

10: mask frame 11: sensor

12 controller 13 motor

14: threaded rod 15: guide rail

16: turning

The present invention relates to a screen mask parallelism of the circuit board copper foil printing equipment and a device for adjusting the gap between the screen mask and the stage, and more particularly, to change the structure to quickly adjust the parallelism of the screen mask and the gap between the screen mask and the stage. And precisely automatic adjustment.

In general, when printing copper foil on a circuit board, the screen mask for the stage should be kept parallel and the distance between the screen mask and the stage should be appropriate so that the copper foil printing state of the circuit board can be good and a high quality printed circuit board can be obtained. The circuit board copper foil printing apparatus has a device that can adjust the parallelism of the screen mask and a device that can adjust the distance between the screen mask and the stage.

Conventionally, as shown in FIGS. 1 to 2, the servo motor 24 having the screw rod 23 rotatably coupled to the lower surface of the main base 22 in the main body 21 is fixed. In addition, the screw rod 23 is provided with a stage 25 to move up and down as the screw rod rotates, and the main body 21 has a mask frame holder having legs 26 formed on both sides of the front lower surface thereof. 27 is rotatably hinged, and the mask frame holder 27 is fixed to the mask frame holder 27 to which the screen mark 28 is attached so as to be kept at a predetermined distance from the stage 25. An adjustment bolt 30 is fastened to the lower surface of the 21 to move the leg 26 formed in the mask frame holder 27 up and down so that the screen mask holder 27 is rotated about a hinge axis.

Therefore, as shown in FIG. 1, the circuit board 31 is placed on the stage 25 and the parallelism of the screen mask 28 with respect to the stage 25 is adjusted, and at the same time, the space between the screen mask and the stage 25 is adjusted. After adjusting the gap, the copper foil may be printed on the circuit board 31 in the same pattern as the pattern formed on the screen mask 28. The copper foil printing may be performed by a separate printing device (not shown).

First, when adjusting the parallelism of the screen mask 28 with respect to the stage 25, the height difference between the four corners of the mask frame holder 27 and the main base 22 is measured by a height gauge, and as a result, If the height of the front edge portion of the mask frame holder is higher than the height of the hinge shaft portion of the mask frame holder 27 hinged to the main body 21, the adjustment bolt 30 is fastened to the lower surface of the main base 22. The parallelism of the screen mask 28 with respect to the stage 25 may be adjusted by rotating in the forward (clockwise) direction. In contrast, the height of the front edge of the mask frame holder is higher than the height of the hinge axis of the mask frame holder 27. If is low, it is possible to adjust the parallelism of the screen mask 28 with respect to the stage 25 by rotating the adjusting bolt 30 fastened to the lower surface of the main base 22 in the reverse direction (counterclockwise).

That is, when the adjusting bolt 30 is rotated in the forward direction, the legs 26 formed in the mask frame holder 27 move downward, and thus the mask frame holder 27 pivots downwardly around the hinge axis and the adjusting bolt 30. ) Rotates in the reverse direction, the leg 26 formed in the mask frame holder 27 moves upward, so that the mask frame holder 27 rotates upwardly around the hinge axis and is fixed to the mask frame holder 27 accordingly. The screen mask 28 of the mask frame 29 is parallel to the stage 25. In addition, when adjusting the distance between the screen mask 28 and the stage 25, the servo motor 24 is driven by supplying power to the servo motor 24 fixed to the lower surface of the main base 22.

That is, when the distance between the screen mask 28 and the stage 25 is narrower than the proper interval, the servo motor 24 may be rotated in the forward direction (clockwise). In this case, the screw rod 23 may rotate the servo motor ( As the stage 25 moves downward, the interval between the screen mask 28 and the stage 25 is widened so that the stage 25 is rotated in the forward direction by receiving the forward rotational force of the 24 and the screen mask 28 is adjusted. When the distance between the stage and the stage 25 is wider than the proper interval, the servo motor 24 may be rotated in the reverse direction (half-clockwise direction). In this case, the screw rod 23 may reverse the rotational force of the servo motor 24. As the stage 25 is moved upward, the space between the screen mask 28 and the stage 25 is narrowed to adjust the proper interval.

However, such a conventional device requires a height gauge to measure the height difference between the corners of the stage and the fixed frame, and to adjust the parallelism of the screen mask with respect to the stage and the gap between the screen mask and the stage artificially. While this takes a long time, there was a problem of inferior accuracy.

The present invention has been made to solve the above problems, and by using a sensor to adjust the parallelism of the screen mask with respect to the stage and the distance between the screen mask and the stage can be automatically performed, while reducing the work time The purpose is to improve the accuracy.

According to an aspect of the present invention for achieving the above object, a fixed frame fixed to the upper portion in the main body, a fixed mask frame holder fixed to one side of the rear of the fixed frame to support the rear side corner portion of the mask frame, and the fixed frame A movable mask frame holder which is installed on the other side of the rear side and the front side of the mask so as to be moved up and down by the moving means to support the other side and the front edges of the mask frame, and is installed on the upper surface of the stage and attached to the mask frame. A plurality of sensors for measuring the distance between each corner of the screen mask and the stage, and the parallelism adjustment value of the screen mask and the distance adjustment value between the screen mask and the stage is calculated according to the values measured at each sensor installed in the main body The controller comprises a controller for controlling the driving means and the drive of the servo motor Provided are screen mask parallelisms of a circuit board copper foil printing apparatus and a gap adjusting device between a mask and a stage.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 3 to 6 of the accompanying drawings.

FIG. 3 is a plan view schematically showing the apparatus of the present invention, FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3, and FIG. 5 is a principal component diagram showing the state of adjusting the parallelism of the screen mask by the apparatus of the present invention. 6 is a main configuration showing the state of adjusting the distance between the screen mask and the stage by the apparatus of the present invention, the present invention is the main screw rod (3) is rotatable on the lower surface of the main base (2) in the main body (1) The servomotor 4 coupled to the shaft is fixed, and the stage 5 is installed on the main screw rod 3 so as to move up and down in accordance with the rotation of the main screw rod. The frame 6 is fixed to the rear side of the fixing frame to fix the fixed mask frame holder 7, and the other side and the front both sides to move up and down by moving means, respectively The holder 8 is installed, and the fixed mask frame holder 7 and the movable mask frame holder 8 support the mask frame 10 having the screen mask 9 attached thereto, and a mask frame on the upper surface of the stage 5. A plurality of sensors 11 are provided to measure the distance between each corner of the screen mask 9 attached to the screen 10 and the stage 5, and the main body 1 is provided with each sensor 11. The controller 12 is installed to control the moving means and the stage 5 by calculating the parallelism adjustment value of the screen mask 10 and the gap adjustment value between the screen mask and the stage 5 according to the measured value. .

The moving means is a motor 13 fixed to the other rear and front sides of the fixed frame 6, the screw rod 14 is rotatably installed on the motor and screwed to the moving mask frame holder 8 When the screw rod 14 is rotated according to the driving of the motor 13, the movable mask frame holder 8 is moved up and down.

On the other hand, the guide rail 15 is integrally formed on the other rear side and the front side of the fixed frame 6, and the projection mask 16 is formed on the movable mask frame holder 8 so that the movable mask frame holder 8 is moved up and down. The protrusion 16 is guided to the guide rail 15 when moving.

Reference numeral 17 is a circuit board.

Referring to the operation, effects of the present invention configured as described above are as follows.

The circuit board 17 is placed on the stage 5, and then the copper foil having the same shape as the pattern formed on the screen mask 9 is printed on the circuit board 17. Only when the parallelism of the screen mask 9 with respect to the screen mask and the distance between the screen mask and the stage 5 is adjusted, the copper foil printing state of the circuit board 17 is good.

Then, the process of adjusting the parallelism of the screen mask 9 and adjusting the gap between the screen mask and the stage 5 will be described in detail.

When the circuit board 17 is placed on the stage 5, the parallelism adjustment of the screen mask 9 and the gap adjustment button between the screen mask and the stage 5 are selected, and each corner of the stage 5 is selected. The installed sensor 11 is operated to measure the distance between the stage 5 and each corner of the screen mask 9 attached to the mask frame 10, and the measured value is transferred to the controller 12 installed in the main body 1. It is transmitted and calculated by the controller to adjust the parallelism of the screen mask 9 and the distance between the screen mask and the stage 5 according to the calculated value.

That is, when the value measured by each sensor 11 is transmitted to the controller 12, the controller obtains a difference value between the other sensors (rear other sensor, front front sensor) based on one rear sensor and the screen mask 9 The difference between the interval between the screen mask 9 and the stage 5 measured by the predetermined interval value and the rear side sensor between the stage and the stage 5 is calculated. In this way, when the difference value of the other sensor is obtained from the controller 12 on the basis of the rear one side sensor, the controller controls driving of the motor 13 fixed to the other rear side and the front one side of the fixed frame 6, respectively. Since each motor is selectively driven in the forward and reverse directions, the threaded rods 14 rotatably installed in the respective motors 13 rotate, and accordingly, each movable mask frame holder 8 moves upward in the direction of rotation of the threaded rods 14. The height of each edge portion of the mask frame 10 supported by the movable mask frame holder 8 and the height of the edge portion of the mask frame 10 supported by the fixed mask frame holder 7 are equal to each other because they move or move downward. The screen mask 9 attached to the mask frame is parallel to each other (see Fig. 5).

In the above, when the moving mask frame holder 8 moves up and down in accordance with the forward and reverse rotation of the screw rod 14, respectively, on the rear side and the front side of each protrusion 6 formed on the movable mask frame 8, respectively. The guide rail 15 is formed to guide the moving mask frame holder 8 to be moved up and down stably without shaking.

In addition, when a difference between the preset interval value between the screen mask 9 and the stage 5 and the measured interval value between the screen mask 9 and the stage 5 is calculated by the controller 12, the controller may include a main body ( 1) Since the servomotor 4 fixed to the main base 2 in the main body is driven, the main screw rod 3 rotates forward or reverse according to the driving direction of the servomotor 4, and accordingly, the stage 5 moves to the main The gap between the screen mask 9 and the stage 5 is adjusted to be equal to the preset interval value by moving upwards or downwards according to the rotation direction of the four poles 3 (see FIG. 6).

The above and below movement of the stage 5 during the operation of the present invention described above can be understood more quickly by referring to the conventional operation description.

Therefore, the present invention has the effect of improving the accuracy while reducing the work time because the adjustment of the parallelism of the screen mask with respect to the stage and the distance between the screen mask and the stage is automatically made by the sensor.

Claims (3)

A fixed frame 6 fixed to an upper portion of the main body 1, a fixed mask frame holder 7 fixed to a rear side of the fixed frame to support a rear side corner portion of the mask frame 10, and the fixed frame A movable mask frame holder 8 provided on the other side of the rear side and the front side of the rear side of the mask 6 so as to be movable up and down by the moving means to support corners of the rear side and the front side of the mask frame 10, and the stage 5 A plurality of sensors 11 and a main body 1 which are installed on the upper surface of the sensor and measure the distance between each part of the screen mask 9 attached to the mask frame 10 and the stage 5. The control of driving of the moving means and the servomotor 4 is calculated by calculating the parallelism adjustment value of the screen mask 9 and the gap adjustment value between the screen mask and the stage 5 according to the value measured by each sensor 11. It is configured to include a controller 12 Gap adjusting device between the printed circuit board copper foil equipment of the screen mask and the parallelism between the mask and the stage which. The method of claim 1, wherein the moving means is a motor 13 mounted on the other rear and front sides of the fixed frame 6 and the screw rotatably coupled to the moving mask frame holder (8) rotatably installed on the motor. Screen mask parallelism and screen mask of the circuit board copper foil printing equipment configured to include a four-fourth rod so that the moving mask frame holder 8 is moved up and down when the screw rod 14 rotates according to the driving of the motor 13. Gap between the stage and the stage. According to claim 1 or 2, wherein the guide rails (15) are formed on the other side and the front both sides of the fixed frame (6), and each of the movable mask frame holders (8) by forming a projection (16) to the movement Screen mask parallelism of the circuit board copper foil printing equipment and the gap between the screen mask and the stage so that the projection (16) is guided to the guide rail (15) when the mask frame holder (8) moves up and down.