JPH0642166U - Screen printing machine - Google Patents

Abstract

(57) [Summary] [Object] The present invention aims to simplify the setup change of the pressing member corresponding to the substrate size of the substrate to be handled. [Structure] When a printed circuit board (2) conveyed from the upstream side is suction-mounted on a mounting table (3), the board (2) is prevented from being lifted by the pressing member (7). Press on the mounting table (3) from the top. When handling substrates (2) of different substrate types, the moving mechanism (1
7) Pressing member (7) in position for use by
Are moved to the stocker and stocked, and the pressing member (7) corresponding to the substrate (2) of the stocker is moved to the position for use.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a screen printing machine for applying a coating material on a screen plate to a printed circuit board via a squeegee.

[0002]

[Prior art]

 In this type of screen printing machine, the printed circuit board conveyed from the upstream side is adsorbed and placed on the table. In this case, the pressing member is pressed from the top surface of the board to facilitate adsorption.

However, it has been troublesome because the pressing member has to be set up according to the size of the substrate to be handled.

[0004]

[Problems to be solved by the device]

 Therefore, it is an object of the present invention to simplify the setup change of the pressing member corresponding to the substrate size of the substrate to be handled.

[0005]

[Means for Solving the Problems]

 Therefore, the present invention is a screen printing machine for applying a coating material on a screen plate to a printed circuit board via a squeegee, and a table for sucking and mounting the printed circuit board conveyed from the upstream side, and the substrate is the table. A plurality of holding members for lowering to the upper surface of the substrate to prevent lifting of the substrate when it is sucked and mounted on the substrate, a stocker for stocking the holding members, and the holding member corresponding to the substrate type. And a moving mechanism for moving the holding member in the position for use when changing the stocker to the stocker for stocking, and for moving the holding member corresponding to the substrate of the stocker to the position for using the holding member. is there.

[0006]

With the above configuration, when the printed circuit board conveyed from the upstream side is sucked and placed on the table, the pressing member presses the circuit board from the upper surface so that the printed circuit board does not float. Also, when handling substrates of different types, the holding member that is in the position for use by the moving mechanism is moved to the stocker and stocked, and the holding member corresponding to the substrate of the stocker is used. Is moved to the position.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

A screen printing machine (1) is a cream as a coating agent in a desired pattern so that a chip-shaped electronic component can be mounted on the upper surface of a print substrate (2) conveyed from an upstream device (not shown). Solder is applied.

(3) is a mounting table on which the substrate (2) is mounted and the substrate (2) is suction-mounted on the upper surface by a vacuum pump (not shown).

Reference numeral (4) is a moving table provided below the mounting table (3), and the mounting table (3) is moved by the movement of the moving table (4). That is, the moving table (4) is moved up and down by the driving of the cylinder (5), so that the mounting table (3) is moved up and down. Further, the mounting table (3) is moved to the rear printing section side shown in FIG. 2 by a moving mechanism (not shown).

(7) is a substrate (2) driven by a cylinder (14) described later in order to prevent the substrate (2) from being lifted when the substrate (2) is mounted on the mounting table (3) by suction. It is a pressing member that is prevented from rising by being lowered to the upper surface of the substrate and its substrate pressing portion (8) coming into contact with the substrate (2).

As shown in FIG. 3, the pressing plate (7) has two Y-direction guide bars (9) (9) and three X-direction guide bars (10) (10) (10) in the Y-direction. The guide bars (9) and (9) are formed so as to intersect each other so as to be movable in the Y direction. Then, three substrate pressing portions (8) are screwed to the X-direction guide bars (10), (10) and (10) at desired positions by three screws. The substrate retainer (8) is adjusted in the X direction according to the size of the substrate (2) to be handled by adjusting the mounting position on the X guide bars (10), (10), (10), and also in the Y direction. Can be dealt with by moving and adjusting the X guide bar (10) (10) (10) along the Y guide bar (9) (9). The substrate retainer (8) is biased downward by the spring (11).

Further, the upper surfaces of the Y-direction guide bars (9) (9) are connected to a connecting plate (12), and a pressing member holding mechanism (20) described later is provided on the upper surface of the connecting plate (12). ), A clamped part (13) is provided.

Reference numeral (14) shown in FIG. 1 is a moving mechanism (horizontally moved vertically with respect to the paper surface of FIG. 1 via a guide (16) by a ball screw (15) rotated by a drive motor (not shown). The cylinder (17) is fixed to the rod (18) of the cylinder (14), and the coupling fitting (19) is abutted against the rod (18) by a spring (not shown). The holding member holding mechanism (20) is fixed. The holding mechanism (20) has a notch () of the portion to be held (13) which is inserted into a fitting groove (23) formed in a single letter on the bottom of the rod (22) by driving a cylinder (21). Since the pressing member (7) is fixed by sandwiching 24), the pressing member (7) is moved up and down by driving the cylinder (14).

Next, the printing unit will be described.

Reference numeral (26) is a screen positioned above the mounting table (3) moved by the moving mechanism, and a screen plate (27) on which a desired circuit pattern is formed, and the plate (27). And a screen frame (28) surrounding the.

(29) moves the screen plate (27) of the screen (26) while pressing the screen plate (27) against the substrate (2), and the cream solder supplied onto the screen plate (27) is applied to the base plate (2). It is a squeegee applied on top. The squeegee (29) is lowered onto the screen plate (27) by a vertical movement mechanism (not shown) and horizontally moved on the screen plate (27) by a moving mechanism (not shown).

Next, the control system will be described.

Reference numeral (30) shown in FIG. 4 is a CPU, and various operations related to the printing operation of the printed board (2) of the screen printing machine (1) are stored in the ROM (32) based on the information stored in the RAM (31). ) According to the program stored in.

An interface (33) connects the cylinders (5), (14), (21), the CRT (34), an operation unit (36), which will be described later, and the like.

(35) is a drive circuit for driving each motor and each cylinder.

Reference numeral (36) denotes an operation unit, such as a numeric keypad (37) for inputting data, a cursor key (38), a teaching key (39) for setting an NC data setting mode, and a start key for starting operation. (40), a stop key (41) for stopping the operation and a SET key (42) are provided.

Next, the operation of setting the NC data will be described.

First, when the teaching key (39) is pressed, the NC data screen shown in FIG. 8 is displayed on the CRT (34) screen. Next, operate the cursor key (38) to move the cursor (not shown) to the "board number 1" which is the board type you want to set, and press the SET key (42) to set each data on the CRT (34) screen. This is the screen for the operation data to operate.

Next, the operator operates the ten keys (37) or the like to input each data as shown in the screen of FIG. Each data in FIG. 9 will be described.

“Substrate size” is data indicating the size of the substrate (2) in the X direction and the Y direction in the unit of “mm”. For the substrate type “substrate number 1”, the size in the X direction is “300.0”. 0 mm ". The size in the Y direction is “200.00 mm”.

The “squeegee speed” is data indicating the moving speed of the squeegee (9) when printing the paste solder, and is set in the unit of “mm / sec”. In the case of the substrate type “substrate number 1”, it is “30 mm / sec”.

The “squeegee angle” is data indicating the angle of the squeegee (9) with respect to the screen plate (7) and is set in the unit of “degree”. In the case of the board type “board number 1”, it is “40 degrees”.

“1” is set in the “pressing member number”. The data set above is performed for each type of substrate and stored in the RAM (24) for each type of substrate (2).

The operation will be described below.

Here, the case where the board (2) with the board number 1 is designated by the NC data shown in FIG. 8 stored in the RAM (31) will be described below.

First, when the mounting table (3) is below the transfer level of the supply conveyor, and the substrate (2) transferred from the upstream device by the conveyor is positioned above the mounting table (3), The conveyor is stopped.

Next, the mounting table (3) is moved up by the cylinder (5) and the pressing member (7) is moved down on the substrate (2) by the driving of the cylinder (14). The substrate (2) is pressed and mounted on the mounting table (3) by the substrate (2) pressing the substrate (2) onto the mounting table (3) via the biasing force of the spring (11). Incidentally, the pressing member (7) of "1" designated by the "pressing member number" of the operation data shown in FIG. 9 has already been prepared.

Next, after the mounting table (3) is moved to the printing unit side by the moving mechanism, the screen plate (27) is moved to a position where the paste solder can be applied to the substrate (2) by the ascending / descending means not shown. Descend to.

Thereafter, the printing operation of the paste solder on the substrate (2) is performed by the movement of the squeegee (29). This printing operation will be described.

The squeegee (29) has already been angle-adjusted to “40 degrees” specified by the “squeegee angle” of the operation data. For example, the squeegee (29) on the right side is lowered by the operation of the syringe (14). Then, the moving mechanism horizontally moves the squeegee (29) while imprinting the paste solder on the substrate (2) at "30 mm / sec" specified by the "squeegee speed" of the operation data.

The substrate (2) on which printing has been completed is discharged by the discharge conveyor after the mounting table (3) is lowered by driving the cylinder (5).

Thereafter, the printing operation is continued in the same manner.

Next, the case of handling the board (2) having the board number 2 having different board sizes will be described with reference to FIGS. 5 to 7 and 10.

First, the ball screw (15) of the moving mechanism (17) is rotated by the driving of the drive motor, and is guided by the guide (16) to hold the holding member holding mechanism (20) through the cylinder (14). Moves the holding member (7) that is currently held by being horizontally moved in the vertical direction (for example, the back side) with respect to the paper surface of FIG. 1 to a standby position (for example, a stocker having a mounting portion) not shown, The holding of the held portion (13) by (21) is released, and the pressing member (7) is placed at that position (placement portion). Then, the pressing member (7) shown in FIG. 5 placed at the standby position symmetrical to the standby position (the pressing member (2) designated by the “pressing member number” of the operation data shown in FIG. 10 ( 7)) The movement is started in order to pinch. At this time, the holding mechanism (20) exits from the held portion (13) as it is through the fitting groove (23). In the holding member (7), the position of the substrate holding portion (8) is adjusted in advance so as to correspond to the size of the substrate (2) to be handled next, as shown in FIG.

That is, as shown in FIG. 6, since the substrate (2) to be handled next time is small, the X guide bars (10), (10) and (10) are first attached to the substrate (2) in the X direction. The board retainers (8) located at both ends of the attached board retainer (8) are unlocked, moved toward the center so that they can contact the board (2), and then again. In the Y direction, the X guide bars (10), (10), and (10) are screwed together, and the X guide bars (10), (10) at both inner ends of the X guide bars (10), (10), (10) are moved toward the center. It has been moved to.

As described above, the pressing member (7), in which the position of the substrate pressing portion (8) is adjusted corresponding to the substrate (2) to be handled, is attached to the clamped portion (13) of the pressing member (7). After the fitting groove (23) of the holding mechanism (20) has entered, the rod (22) holds the notch (24) of the held portion (13) by driving the cylinder (21). Then, the holding member (7) is returned to the predetermined position by the post-nip movement mechanism, and the printing operation is restarted. That is, as described above, when the substrate (2) transferred from the upstream side device by the supply conveyor is positioned above the mounting table (3) and the transfer by the conveyor is stopped, the mounting table (2) is transferred by the cylinder (5). 3) is raised and the pressing member (7) is lowered by the drive of the cylinder (14), and the substrate pressing portion (8) moves the substrate (2) through the biasing force of the spring (11) to the mounting table (7). The substrate (2) is sucked and mounted on the mounting table (3) by being pressed against the substrate 3).

Next, after the mounting table (3) is moved to the printing section side by the moving mechanism, the screen plate (27) is lowered by the elevating means to the position where the paste solder can be applied to the substrate (2). Then, the movement of the squeegee (29) causes the printing operation of the paste solder on the substrate (2). At this time, the squeegee (29) is already adjusted to "45 degrees" specified by the "squeegee angle" of the operation data shown in Fig. 10, and for example, the right squeegee (29) is the syringe (14). When the squeegee (29) is lowered by the operation, the squeegee (29) moves horizontally while imprinting the paste solder on the substrate (2) at "30 mm / sec" specified by the "squeegee speed" of the operation data.

The substrate (2) on which printing has been completed is discharged by the discharge conveyor after the mounting table (3) is lowered by driving the cylinder (5).

In addition, a plurality of holding members (7) corresponding to various substrates (2) are stored in a storage mechanism, and the holding members (7) corresponding to the substrates (2) are taken in and out of the storage mechanism. May be.

[0046]

[Effect of device]

 As described above, according to the present invention, it is possible to easily perform the setup change of the pressing member corresponding to the substrate size of the substrate to be handled.

[Brief description of drawings]

FIG. 1 is a front view showing a holding member holding mechanism.

FIG. 2 is a front view showing a printing unit of the screen printing machine.

FIG. 3 is a plan view showing a pressing member.

FIG. 4 is a control block diagram.

FIG. 5 is a front view showing a pressing member.

FIG. 6 is a plan view showing a pressing member.

FIG. 7 is a front view showing a holding member holding mechanism.

FIG. 8 is a diagram showing NC data.

FIG. 9 is a diagram showing operation data.

FIG. 10 is a diagram showing operation data.

[Explanation of symbols]

 (1) Screen printer (2) Printed circuit board (3) Mounting table (7) Holding member (8) Board holding part (9) Y direction guide bar (10) X direction guide bar (11) Spring (13) Nipped Part (14) Cylinder (17) Moving mechanism (20) Holding member holding mechanism (21) Cylinder

Claims (1)

[Scope of utility model registration request] 1. In a screen printing machine for applying a coating material on a screen plate to a printed circuit board via a squeegee, a table on which a printed circuit board conveyed from an upstream side is mounted by suction, and the substrate is the table. A plurality of holding members for lowering to the upper surface of the substrate to prevent floating of the substrate when it is sucked and placed on the stocker, a stocker for stocking the holding members, and the holding member corresponding to the substrate type. And a moving mechanism for moving the holding member in the position for use when changing the stocker to the stocker and moving the holding member corresponding to the substrate of the stocker to the position for using the holding member. And a screen printing machine.