JP2010046843A - Screen printing machine - Google Patents

Abstract

An object of the present invention is to convey two printed boards so that two sheets can be printed by one squeegee movement, and the structure is simple.
Based on the amount of misalignment between one printed circuit board P and the screen 3, the control means determines the amount of misalignment of the one printed circuit board P in the Y axis direction by the Y axis drive source of the first Y table 9. The shift amount in the axial direction is corrected and moved by the X-axis drive source of the first X table 10A, and the shift amount in the rotation direction is also corrected by the θ-axis drive source of the first θ table 11A. Further, based on the amount of misalignment between the other printed circuit board P and the screen 3, the control means determines the amount of misalignment of the other printed circuit board P in the Y-axis direction by the Y-axis drive source of the screen support means and also in the X-axis direction. The shift amount is corrected and moved by the X-axis drive source of the second X table 10B, and the shift amount in the rotation direction is also corrected and moved by the θ-axis drive source of the second θ table 11B.
[Selection] Figure 1

Description

  According to the present invention, a screen on which a peripheral edge of a screen plate is supported by a screen frame and a printed board are aligned with each other and a pattern is formed on the printed board by moving a coating agent on the screen and moving a squeegee. The present invention relates to a screen printer that applies through holes.

This type of screen printing machine is disclosed in, for example, Japanese Patent Application Laid-Open No. H10-228707. For example, the screen and the printed board are aligned, and the pattern hole is formed on the printed board by moving the coating agent on the screen by moving the squeegee. It is applied through. For this alignment, a substrate support table that is movable in the X-axis and Z-axis directions and is rotated in a horizontal plane, and a screen support means that is disposed above the substrate support table and is movable in the Y-axis direction are provided. Yes.
JP 10-44370 A

  However, since screen printing on a printed circuit board can be processed only one by one, the production efficiency is not good. In addition, it is conceivable that two printed boards are transported and printing processing is performed by simultaneously moving two squeegees, but the configuration becomes complicated.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to convey two printed circuit boards so that two sheets can be printed by one movement of the squeegee and can be performed with a simple structure. To do.

For this reason, the first aspect of the present invention is to align the screen on which the peripheral edge of the screen plate is supported by the screen frame and the pattern hole is formed with the printed board, and move the coating agent on the screen by moving the squeegee. A screen printing machine for applying a pattern hole on a substrate,
Screen support means for supporting the screen and moving the screen in one direction by a one-way moving mechanism;
Each positioning mechanism for positioning two printed boards, respectively, arranged along the transport direction of each printed board,
And a moving mechanism for relatively moving the screen and each positioning mechanism.

According to a second aspect of the present invention, the screen having the peripheral edge of the screen plate supported by the screen frame and the printed board are aligned with each other, and the coating agent on the screen is moved by moving the squeegee on the screen. A screen printing machine that applies to the pattern through a hole,
Screen support means for supporting the screen and moving the screen in one direction by a one-way moving mechanism;
A board support mechanism for supporting two printed boards,
The substrate support mechanism is
Each positioning mechanism for positioning one and the other printed circuit boards respectively and disposed along the transport direction of each printed circuit board;
A first one-way moving mechanism for moving one printed circuit board in the one direction, a first other-direction moving mechanism for moving in one direction orthogonal to the one direction, and a first rotating mechanism for rotating in a horizontal plane;
A second other-direction moving mechanism for moving the other printed circuit board in another direction orthogonal to the one direction and a second rotating mechanism for rotating in a horizontal plane are provided.

According to a third aspect of the present invention, the screen having the peripheral edge of the screen plate supported by the screen frame is aligned with the printed board, and the coating agent on the screen is moved by moving the squeegee on the screen. A screen printing machine that applies to the pattern through a hole,
Screen support means for supporting the screen and moving the screen in one direction by a one-way moving mechanism;
Each positioning mechanism for positioning one and the other printed circuit boards respectively and disposed along the transport direction of each printed circuit board;
One positioning mechanism corresponding to one printed circuit board can be moved in the one direction by a first one-way moving mechanism, and can be moved in another direction orthogonal to the one direction by a first other-direction moving mechanism. And can be rotated in a horizontal plane by the first rotation mechanism,
The other positioning mechanism corresponding to the other printed circuit board can be moved in another direction orthogonal to the one direction by the second other-direction moving mechanism and can be rotated in a horizontal plane by the second rotating mechanism. And

According to a fourth invention, in the second or third invention, a board recognition camera that images a board recognition mark of each printed circuit board and a screen recognition camera that images the screen recognition mark of the screen are provided.
Based on these recognition results,
The amount of deviation between one printed circuit board and the screen is corrected by the first one-way moving mechanism, the first other-direction moving mechanism, and the first rotating mechanism,
The amount of deviation between the other printed circuit board and the screen is corrected by the one-way moving mechanism, the second other-direction moving mechanism, and the second rotating mechanism of the screen support means.

  The present invention is configured to convey two printed circuit boards so that two sheets can be printed by one movement of the squeegee, and can be performed with a simple structure. The positional deviation between the printed circuit board and the screen can be corrected simultaneously.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view of a main part of a screen printing machine. The screen printing machine 1 is roughly divided into a substrate support mechanism 2 installed on a base and a screen disposed above the substrate support mechanism 2. 3 and a screen support means that can move in the Y-axis direction (direction orthogonal to the substrate transport direction), and two sheets that are arranged between the substrate support mechanism 2 and the screen support means and supported by the substrate support mechanism 2 A first image pickup means 4 for picking up an image of each board recognition mark attached to a position on the diagonal line of the printed circuit board P, and a screen recognition attached to the screen 3 disposed above the screen support means and supported by the screen support means. Second imaging means 5 for imaging the mark, a pair of print heads arranged above the screen 3, and a supply conveyor for supplying each printed board P onto the board support mechanism 2 1A and 21B (refer to FIG. 2), discharge conveyors 22A and 22B (refer to FIG. 2) for discharging each substrate P from the substrate support mechanism 2, and images captured by the first and second imaging means 4 and 5 are displayed. And a monitor (not shown) to be described later.

  The screen 3 has a quadrangular shape in plan view, and the periphery of the screen plate 3A is supported by the screen frame 3B. The screen plate 3A has two front and rear portions corresponding to two printed boards P described later. Print pattern areas 3A1 and 3A2 are formed.

  The substrate support mechanism 2 includes a support table 7 that can be moved up and down by a Z-axis movement mechanism (including a Z-axis drive source) 6, a movement mechanism for moving one (back side) printed circuit board P, and the other (front side). And a mechanism for moving the printed circuit board P on the side).

  In other words, the former moving mechanism corresponding to one printed circuit board P includes the first positioning mechanism 8A that inherits and fixes the one printed circuit board P from the supply conveyor 21A, and one print mechanism provided on the support table 7. A first Y table (first one-way moving mechanism) 9 for moving the substrate P in the Y-axis direction orthogonal to the X-axis direction (substrate transport direction) by driving a Y-axis drive source, and on the first Y table 9 A first X table (first other-direction moving mechanism) 10A that can move one printed circuit board P in the X-axis direction by driving an X-axis drive source, and a θ-axis drive source provided on the first X table 10A And a first θ table (first rotation mechanism) 11A that rotates the first printed circuit board P by rotating the first positioning mechanism 8A in the horizontal plane by driving the motor. The latter moving mechanism corresponding to the other printed circuit board P includes a second positioning mechanism 8B that inherits and fixes the other printed circuit board P from the supply conveyor 21B, and the other printed circuit board P provided on the support table 7. Is moved in the X-axis direction by driving the X-axis drive source, and the second X-table (second other-direction moving mechanism) 10B is provided in the horizontal plane by driving the θ-axis drive source provided on the second X table 10B. 2 includes a second θ table (second rotation mechanism) 11B that rotates the other printed circuit board P by rotating the positioning mechanism 8B.

  The first and second positioning mechanisms 8A and 8B include a pair of conveyors 12A and 12B for conveying the printed circuit board P in the X-axis direction by driving an X-axis drive source, and the conveyors 12A and 12A, There are provided push-up plates 13A and 13B that are movable up and down to press each printed circuit board P that has been transported to 12B and stopped at a predetermined position onto a regulating portion (not shown) by driving a Z-axis drive source.

  The screen support means includes a screen support for supporting the screen 3, two cylinders arranged above the screen support, each for pressing the screen 3 against each screen support, and a horizontally extending Y. And a Y-axis moving mechanism for moving in the Y-axis direction by driving an axis drive source.

  The first imaging unit 4 includes a substrate recognition camera, a moving mechanism that moves the substrate recognition camera in the X-axis and Y-axis directions by driving the X-axis drive source and the Y-axis drive source, and the substrate support mechanism 2. And an illumination device (not shown) for irradiating each printed circuit board P with light. The second imaging means 5 includes a screen recognition camera, a moving mechanism that moves the screen recognition camera in the X-axis direction by driving an X-axis drive source, and an illumination device that irradiates the screen 3 with light (not shown). The screen recognition camera is also moved in the Y-axis direction by a print head moving mechanism (including a Y-axis drive source) including the squeegee 15.

  The print heads are arranged at intervals in the Y-axis direction, and squeegees 15 and 15 are respectively attached to the lower end portions. The squeegees 15 and 15 are simultaneously moved in the Y-axis direction and vertically moved by the moving mechanism. The mechanism (including the Z-axis drive source) individually moves in the Z-axis direction (vertical direction). When the print head moves forward, the rear squeegee 15 descends and slides on the screen plate 3A of the screen 3, and when moving forward, the front squeegee 15 descends. Slide on the screen plate 3A.

  Accordingly, the printing process is performed twice by one reciprocating movement of the squeegee 15, and the screen is applied to one printed circuit board P positioned by the first positioning mechanism 8 </ b> A of the substrate support mechanism 2 by the forward operation or the backward operation. Before the solder paste is printed through the pattern hole H1 of the printed pattern area 3A1 after being formed on the board 3A, and the other printed circuit board P positioned by the second positioning mechanism 8B is printed on the screen board 3A. A solder paste as a coating agent is printed through the pattern hole H2 of the pattern area 3A2.

  The supply conveyors 21A and 21B are connected to the substrate support mechanism 2 by moving the substrate support mechanism 2 in the upstream direction. When the supply conveyors 21A and 21B are driven in this state, the conveyors 12A and 12B of the substrate support mechanism 2 are driven. Are linked. The discharge conveyors 22A and 22B are connected to the substrate support mechanism 2 by moving the substrate support mechanism 2 in the downstream direction. When the discharge conveyors 22A and 22B are driven in this state, the transfer conveyors 12A and 12B of the substrate support mechanism 2 are connected. Are linked.

  Next, the operation of the screen printer 1 will be described. First, when each printed circuit board P is inherited from the upstream device and is on the supply conveyors 21A and 21 (see FIG. 2), a photo sensor (not shown) detects this and a board stopper (not shown) is detected. Lower and hold each substrate P so that it does not move during transport. Next, the board | substrate support mechanism 2 moves to an upstream direction, and each conveyance conveyor 12A, 12B is connected with supply conveyor 21A, 21B, respectively.

  Then, the supply conveyors 21A and 21B are driven, and the conveyance conveyors 12A and 12B of the substrate support mechanism 2 are linked to this to convey the substrate P onto the substrate support mechanism 2, and when the supply conveyors 21A and 21B reach a predetermined position, Stop. Then, each printed circuit board P that has been transported to the conveyors 12A and 12B and stopped at a predetermined position is driven by the Z-axis drive source so that the push-up plates 13A and 13B press the printed circuit board P from below to the regulating portion. After positioning and fixing, the substrate support mechanism 2 moves to the right and returns to the initial position (see FIG. 3). The raising and lowering strokes of the push-up plates 13A and 13B are controlled according to the thickness of the printed board P.

  Next, the board recognition camera of the first image pickup means 4 moves in the X-axis direction and the Y-axis direction to pick up two board recognition marks at positions on the diagonal lines of each printed board P, and the image is a recognition processing device. The position information of each printed circuit board is stored in the storage means.

  Further, the screen recognition camera of the second imaging means 5 moves in the X-axis direction and the Y-axis direction to pick up two screen recognition marks on the screen 3, and the image is recognized by the recognition processing device. The position information of the screen 3 is stored in the storage means.

  Then, the control means compares the position of each board recognition mark of each printed circuit board P stored in the storage means with the position of each screen recognition mark of the screen 3, and makes each printed circuit board P and screen 3 relative to each other. The amount of positional deviation to be positioned is calculated and stored in the storage means.

  Therefore, based on the amount of deviation, that is, the amount of deviation between one printed circuit board P and the screen 3, the control means uses the Y-axis drive source of the first Y table 9 for the amount of deviation in the Y-axis direction of one printed circuit board P. Similarly, the shift amount in the X-axis direction is corrected and moved by the X-axis drive source of the first X table 10A, and the shift amount in the rotation direction is also corrected and moved by the θ-axis drive source of the first θ table 11A. Also, based on the amount of deviation between the other printed circuit board P and the screen 3, the control means uses the Y axis drive source of the screen support means for the amount of deviation of the other printed circuit board P in the Y axis direction, and also in the X axis direction. The shift amount is corrected and moved by the X-axis drive source of the second X table 10B, and the shift amount in the rotation direction is also corrected and moved by the θ-axis drive source of the second θ table 11B.

  Next, for example, the back squeegee 15 is lowered by a vertical movement mechanism including a Z-axis drive source, and the squeegee 15 is moved in the Y-axis direction by driving the Y-axis drive source of the screen support means. Slid on the screen plate 3A of the screen 3 in the forward direction, the solder paste is printed on one printed circuit board P through the pattern hole H1 of the print pattern area 3A1 formed on the screen plate 3A, The solder paste is printed on the other printed circuit board P through the pattern hole H2 of the previous print pattern area 3A2 formed on the screen plate 3A.

  After this printing, the squeegee 15 rises, the substrate support mechanism 2 moves in the downstream direction, and the transfer conveyors 12A and 12B are connected to the discharge conveyors 22A and 22B, respectively (see FIG. 4). Delivered to the downstream device.

  According to the embodiment as described above, two printed circuit boards P are transported so that two sheets can be printed by one movement of the squeegee 15 and can be performed with a simple structure. Thus, the positional deviation between each printed board P and the screen 3 can be corrected simultaneously.

  Note that the type of each printed circuit board P on which two sheets are simultaneously printed by the forward or backward operation of one of the squeegees 15 may be two sheets having the same print pattern or two sheets having different print patterns. Furthermore, the front surface and the back surface of the same printed circuit board P may be used. Further, the screen support unit may correct the deviation in the Y-axis direction by providing the Y-axis drive source in the second X table 10B without moving in the horizontal direction without the Y-axis drive source.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the various embodiments described above without departing from the spirit of the present invention. It encompasses alternatives, modifications or variations.

It is a schematic perspective view of the principal part of a screen printer. It is a top view in the state where a printed circuit board exists on both supply conveyors. It is a top view in the state where each printed circuit board was positioned by the 1st and 2nd positioning mechanisms. It is a top view in the state where a printed circuit board exists on both discharge conveyors.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screen printer 2 Board | substrate support mechanism 3 Screen 8A 1st positioning mechanism 8B 2nd positioning mechanism 9 1st Y table 10A 1st X table 10B 2nd X table 11A 1st θ table 11B 2th θ table 15 Squeegee P Printed circuit board

Claims (4)

The peripheral edge of the screen plate is supported by the screen frame, the screen on which the pattern hole is formed and the printed board are aligned, and the coating agent on the screen is moved through the pattern hole on the printed board by moving the squeegee. A screen printing machine for applying,
Screen support means for supporting the screen and moving the screen in one direction by a one-way moving mechanism;
Each positioning mechanism for positioning two printed boards, respectively, arranged along the transport direction of each printed board,
A screen printing machine comprising a moving mechanism for relatively moving the screen and each positioning mechanism. The peripheral edge of the screen plate is supported by the screen frame, the screen on which the pattern hole is formed and the printed board are aligned, and the coating agent on the screen is moved through the pattern hole on the printed board by moving the squeegee. A screen printing machine for applying,
Screen support means for supporting the screen and moving the screen in one direction by a one-way moving mechanism;
A board support mechanism for supporting two printed boards,
The substrate support mechanism is
Each positioning mechanism for positioning one and the other printed circuit boards respectively and disposed along the transport direction of each printed circuit board;
A first one-way moving mechanism for moving one printed circuit board in the one direction, a first other-direction moving mechanism for moving in one direction orthogonal to the one direction, and a first rotating mechanism for rotating in a horizontal plane;
A screen printing machine comprising a second other-direction moving mechanism for moving the other printed circuit board in another direction orthogonal to the one direction and a second rotating mechanism for rotating in a horizontal plane. The peripheral edge of the screen plate is supported by the screen frame, the screen on which the pattern hole is formed and the printed board are aligned, and the coating agent on the screen is moved through the pattern hole on the printed board by moving the squeegee. A screen printing machine for applying,
Screen support means for supporting the screen and moving the screen in one direction by a one-way moving mechanism;
Each positioning mechanism for positioning one and the other printed circuit boards respectively and disposed along the transport direction of each printed circuit board;
One positioning mechanism corresponding to one printed circuit board can be moved in the one direction by a first one-way moving mechanism, and can be moved in another direction orthogonal to the one direction by a first other-direction moving mechanism. And can be rotated in a horizontal plane by the first rotation mechanism,
The other positioning mechanism corresponding to the other printed circuit board can be moved in another direction orthogonal to the one direction by the second other-direction moving mechanism and can be rotated in a horizontal plane by the second rotating mechanism. And screen printing machine. A board recognition camera that images the board recognition mark of each printed circuit board, and a screen recognition camera that images the screen recognition mark of the screen;
Based on these recognition results,
The amount of deviation between one printed circuit board and the screen is corrected by the first one-way moving mechanism, the first other-direction moving mechanism, and the first rotating mechanism,
3. The shift amount between the other printed circuit board and the screen is corrected by the one-way moving mechanism, the second other-direction moving mechanism, and the second rotating mechanism of the screen support means. The screen printer according to claim 3.

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