JPH0811286A - Screen printing machine - Google Patents

Abstract

PURPOSE:To simplify the setting work of the push-in quantity of a squegee from the surface level of a substrate. CONSTITUTION:A CPU 53 controls a drive mechanism on the basis of the push-in quantity data of a squeegee from the upper surface level of a substrate stored in an RAM 54 to allow the squeegee to fall. When the substrate and a screen are relatively separated after the completion of printing, the squeegee is separated while presses the screen by the push-in quantity set to the push-in quantity data.

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 for printing a coating material on a screen board on a printed board through a squeegee.

[0002]

2. Description of the Related Art As a conventional technique of this type, Japanese Patent Laid-Open No. 4-21
There is one disclosed in Japanese Patent No. 3889. In this method, air is supplied to the cylinder so as to obtain a desired printing pressure, the squeegee is lowered via a piston in the cylinder, and cream solder as an application agent is printed on the substrate via the squeegee. At this time, in consideration of the warp of the substrate, the squeegee is further lowered by a certain pushing amount from the level of the upper surface of the substrate, and the printing is performed while pressing the squeegee. In addition, when the screen and the substrate are moved relative to each other after printing is completed, the screen is separated from the substrate by holding the squeegee with a certain amount of push-in so that the screen does not run apart when the plate is separated. The cream solder printed on the screen comes out in a clean shape through the opening in the screen.

However, since the operator sets the stroke end of the cylinder by adjusting the position of the stopper of the cylinder as the setting operation of the pressing amount, the setting operation of the predetermined pressing amount is troublesome. Further, this troublesome work has to be carried out every time the angle of the squeegee is changed, resulting in poor workability.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to simplify the work of setting the pushing amount of the squeegee from the substrate surface level.

[0005]

Therefore, the present invention is a screen printing machine for printing a coating material on a screen plate onto a printed circuit board through a squeegee, the upper surface of the substrate of the squeegee during a printing operation on the substrate. A storage device that stores the push amount data from the level, a drive mechanism that can move the squeegee up and down with respect to the printing surface, and that can adjust the push amount when descending, and the push amount data stored in the storage device. Based on this, a control device for controlling the amount of lowering of the squeegee by the drive mechanism is provided.

Further, in a screen printing machine for printing a coating material on a screen plate on a printed circuit board through a squeegee, a squeegee angle adjusting mechanism for adjusting the mounting angle of the squeegee and the squeegee on the printing surface. A drive mechanism that can move up and down, and a calculation device that calculates a movement distance when the squeegee adjusted to a desired angle by the squeegee angle adjustment mechanism before the printing operation moves to the substrate upper surface level by the drive mechanism. A storage device for storing movement distance data by the squeegee adjusted to various angles calculated by the calculation device and for storing pushing amount data from the substrate upper surface level of the squeegee during printing operation on the substrate; A designation device that designates the squeegee angle that is adjusted by the squeegee angle adjustment mechanism and a scan device that is designated by the designation device. When the printing operation is performed at a rotation angle, the downward movement operation of the squeegee by the drive mechanism is controlled by adding the pushing amount data to the movement distance data stored in the storage device when the squeegee is lowered when the angle is adjusted. And a control device.

[0007]

With the above structure, the control device controls the drive mechanism based on the squeegee pushing amount data from the substrate upper surface level stored in the storage device so that the squeegee is lowered. After the printing is completed, when the substrate and the screen are relatively separated from each other, the squeegee separates the screen while pressing the screen by the pressing amount set in the pressing amount data.

Further, before starting the printing operation, the operator adjusts the squeegee angle adjusted to a desired squeegee angle by the squeegee angle adjusting mechanism so as to be the squeegee angle specified by the specifying device through the drive mechanism to the substrate upper surface level. Down to.
The moving distance of the squeegee at this time is calculated by the calculating device, and the moving distance data is stored in the storage device. Then, the control device controls the driving mechanism by adding the pushing amount data to the movement distance data in the storage device for the squeegee having the squeegee angle designated by the designating device during the printing operation, and controls the squeegee to descend. To do. Further, when the substrate and the screen are relatively separated after printing is completed, the squeegee separates while pressing the screen by the pressing amount set in the pressing amount data.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 in FIG. 3 denotes a screen printing machine, which applies a cream solder as a coating agent in a desired pattern so that a chip-shaped electronic component is mounted on the upper surface of a printed circuit board 2 conveyed from an upstream device (not shown). .

Reference numeral 3 denotes a mounting table on which the substrate 2 is mounted while being positioned by a positioning mechanism (not shown), and can be moved in X, Y, and θ by a driving mechanism (not shown). Reference numeral 4 denotes a moving table provided below the mounting table 3 and moves the mounting table 3 by moving the moving table 4. That is, the mounting table 3 is moved up and down by the vertical movement of the cylinder 5 which moves the moving table 4 up and down.

Reference numeral 6 denotes a screen, which is composed of a screen plate 7 formed in a desired circuit pattern and a screen frame 8 surrounding the plate 7, and is lowered to the substrate side by a vertical movement mechanism (not shown) before the start of printing. After the printing is completed, it rises and separates from the substrate 2. The substrate side may be lowered with respect to the screen 6, or both the substrate 2 and the screen 6 may be separated from each other.

Reference numeral 9 denotes a pair of squeegees for printing cream solder on the substrate 2 through the screen plate 7 by sliding along the frame 8 after descending to the screen plate 7, as shown in FIG. Air supplied from a compressed air supply source 11 to a squeegee up / down air cylinder 10 corresponding to the squeegee 9 is supplied through each switching valve 13 including an air valve in a state where its pressure is adjusted by an electropneumatic regulator 12. Are moved up and down respectively. The electropneumatic regulator 12 outputs an output board 73 as shown in FIG. 2 in response to a command from the CPU 53 based on the printing pressure value by the squeegee 9 when it comes into contact with the substrate 2 detected by the load cell 41 (see FIG. 2) described later. The solenoid valve 12A is controlled to open via the regulator controller 14 to pressurize a desired printing pressure.

Reference numeral 17 is a mounting plate on which the cylinder 10 is mounted, and a drive motor 18 composed of, for example, a pulse motor.
Is driven to drive the coupling 1 to the motor 18.
Since the mounting plate 17 is fixed to the ball screw 20 via the bearing 21 by rotating the ball screw 20 mounted via the cylinder 9, the cylinder 10 is driven by the drive motor 18 and is shown in FIG. It is guided by the linear guide 22 and moved up and down. Further, the frame 10 to which the linear guide 22 is fixed is moved in the cylinder 10 by being guided by the linear guide 24 on the base 25 by a moving mechanism (not shown), so that the cylinder 10 is horizontally moved in the printing direction. . A servo motor may be used as the drive motor 18. Further, a part of the frame body 23 is fixed to a belt spanned between a driven pulley and a driven pulley which is rotated by driving a driving motor such as a pulse motor or a servo motor as the moving mechanism. The squeegee 9 is moved by moving the frame body 23 along with the movement of the belt.

Next, the squeegee 9 by the cylinder 10
The vertical movement mechanism will be described with reference to FIGS. 5 and 6. An attachment plate 30 attached to the rod 27 of the cylinder 10 via a coupling 28 is guided by a guide body 31 and moved up and down. The mounting plate 30 is the mounting plate 17
And a spring 32 interposed between and so as to approach the mounting plate 17.

Reference numeral 35 is a squeegee mounting plate having a U-shaped cross section fixed to the lower portion of the guide body 31, and a squeegee mounting body 3 in which a squeegee holder 36 is fixed in a recess of the mounting plate 35.
The screw 37 is fixed in the state that 4 is inserted. The squeegee mounting body 34 can be swung about the shaft 38 as a fulcrum on the mounting plate 35 so that the vertical position of the lower surface of the squeegee 9 can be adjusted, and the screw hole corresponding to the screw 37 is vertically arranged. As shown in FIG. 6, the squeegee mounting body 34, which is an elongated hole, is rotated by each of the printing pressure balance adjusting screws 40 provided on both sides of the mounting plate 30 and abutted on the tip of the screw 40. By pressing the load cell 41 fixed to the upper surface of the plate against the biasing force of the preload spring 42,
The squeegee mounting body 34 is swung around the shaft 38 as a fulcrum, and fixed at a desired position by fixing the screw 37 through the elongated hole. At this time, each printing pressure applied to the squeegee 9 is detected by the detection unit 43 of the load cell 41 with which the tip end of the screw 40 is abutted, and displayed on the amplifier 71 shown in FIG. 2, respectively. Therefore, the worker balances the printing pressure applied to both sides based on the displayed data (for example, when applying a printing pressure of 5 kgf, it is desirable that the load cells 41 on both sides detect 2.5 kgf respectively). Prepare and squeegee attachment 3
Fix 4 The printing pressure value detected by the load cell 41 is sent to the CPU 53 via the input board 72.

The squeegee holder 36 to which the squeegee 9 is fixed faces the squeegee mounting body 34 as shown in FIG. 4, and the squeegee angle of the squeegee 9 depends on the viscosity of the paste solder, the hole diameter of the printing pattern, and the like. Adjustably mounted. That is, the squeegee angle adjusting mechanism is fixed to the shaft 45 by rotating the worm wheel 46, which rotates about a shaft 45 penetrating in the longitudinal direction of the squeegee mount 34 as a fulcrum when the worm 47 rotates. The squeegee holder 36 thus adjusted is adjusted to have a predetermined angle. This rotation is caused by the shaft 45.
Is detected by a rotary encoder 49 attached via a coupling 48, and the current angle is sequentially displayed on a display device (not shown). If the squeegee angle is designated, the worm 47 may be automatically rotated by a drive mechanism (not shown), or the shaft 45 may be directly and automatically rotated to automatically adjust the squeegee angle.

Next, the control system will be described. Reference numeral 53 shown in FIG. 1 is a CPU as a control device, and an operation stored in a ROM 55 as a storage device based on various information related to a printing operation of the substrate 2 of the screen printing machine 1 stored in a RAM 54 as a storage device. Follow the program. Reference numeral 56 denotes an interface, which includes the cylinder 5, the squeegee up / down cylinder 10, and the electropneumatic regulator 1.
2, drive motor 18, strain gauge type load cell 41 as a load converter, rotary encoder 49, CRT 57,
An operation unit 60 having a start key 58, a stop key 59, etc., a touch panel switch 65 described later, etc. are connected.

The touch panel switch 65 as a data input device is connected to the CRT 57 via a mounting tool (not shown).
Mounted on the screen of. Further, the touch panel switch 65 has a transparent conductive film coated on the entire surface of the glass substrate, and electrodes are printed on the four sides. Therefore, when a very small electric current is applied to the surface of the touch panel switch 65 and the operator touches it, the electric current changes in the electrodes on the four sides, and the switch portion that causes the coordinate value touched by the circuit board connected to the electrodes in the RAM 54 to perform the operation. If the coordinate values in the coordinate value group stored in advance match, the work is performed.

Various setting operations will be described below. First, when the power is turned on, the CRT 57 displays the initial screen shown in FIG. On this initial screen, operation switch parts for each item of "production operation", "setup work", "data editing", "apparatus maintenance" and "environment setting" are displayed. Each operation switch section is color-coded for each item and is displayed with a double frame, and a touch panel switch 65 is attached to the upper surface thereof.

When the operation switch section for "production operation" on this screen is touched, the production operation (stopped) screen shown in FIG. 8 is displayed. When the operation switch section of the "submenu" on this screen is touched, the submenu screen shown in FIG. 9 is displayed. On this screen, various operation switch parts such as "Production operation step designation", "Operation method setting", "Production model data correction", etc. are displayed.

On this screen, when the operation switch section of "Production model data correction" is touched, the production model data correction screen shown in FIG. 10 is displayed. When the operation switch section of "print data" (the hatched portion in FIG. 10) is touched on this screen, the print data screen shown in FIG. 11 is displayed. On this screen, "board size" for setting the board size (X (horizontal), Y (vertical), T (thickness)) data, and "printing pressure selection" for setting printing pressure data of the squeegee 9 (right side, left side) , Squeegee 9 (right side (A), left side (B)) for setting the pushing amount data from the substrate upper surface level (reference level), such as "squeegee A pushing amount" and "squeegee B pushing amount" There is.

Here, when the operation switch section (hatched portion in FIG. 11) of "board size X (horizontal)" is touched, the switch section is turned on and "board size X" is displayed in the data input display section at the lower left of the screen. (Horizontal): mm (data has been set. Note that no data is currently input.) "Is displayed.
The operation switches of the "numeric keypad" are displayed at the bottom right of the screen.

Then, the operator inputs a dimension (for example, 123.45) in the X (horizontal) direction of the substrate 2 to be handled into the data input display section using the ten-key pad, and clicks "SET" at the lower right of the screen.
When you touch the operation switch section of,
The operation switch section of "(horizontal)" is displayed as "123.45 mm", the lighting is released, and the result is stored in the RAM 54.

When the operation switch section of "Y (vertical) of the board size" is touched, the switch section is also turned on and "Board size Y" is displayed on the data input display section at the lower left of the screen.
(Vertical): mm (data has been set. Note that it has not been input at this time.) ”And each operation switch section of the“ numeric keypad ”is displayed at the lower right of the screen. The operator then measures the size of the substrate 2 to be handled in the Y (vertical) direction (for example, 12
3.45) is input to the data input display section using the ten-key pad, and the operation switch section of "setting" at the lower right of the screen is touched, the operation switch section of "board size Y (vertical)""123.45mm" is displayed and the lighting is released and stored in the RAM 54. Similarly, predetermined data is set to the substrate dimension T (thickness).

Next, when the operation switch section of "printing pressure selection (right side)" (the shaded portion in FIG. 12) is touched, the switch section is turned on and "printing pressure selection ( Right side): kgf (data has been set. Note that it has not been entered at this time.) ”Is displayed,
The operation switches of the "numeric keypad" are displayed at the bottom right of the screen.

Then, the operator has a desired printing pressure value (for example, 5.
0 kgf) is input to the data input display section using the ten-key pad and the operation switch section of "setting" at the lower right of the screen is touched, the operation switch section of "printing pressure selection (right side)" is changed to "5. “0 kgf” is displayed, the lighting is released, and the result is stored in the RAM 54. Similarly, a printing pressure value (for example, 5.0 kgf) for the left squeegee 9 is set. Thus, at the time of printing, the printing pressure of each squeegee 9 is printed based on the printing pressure value set as described above and detected by the load cell 41. Further, the position where the squeegee 9 comes into contact with the upper surface of the screen plate 7 at a position where the height position (reference level) of the squeegee 9 is zero when air is supplied to the cylinder 10 so that the printing pressure becomes the set printing pressure value. The squeegee push-in amount data, which will be described later, is the amount by which the squeegee 9 is further lowered from this reference level. The right and left squeegees do not necessarily have to have the same set printing pressure values.

Next, when the operation switch portion of "squeegee A (right side) pushing amount" (hatched portion in FIG. 13) is touched,
When the switch is turned on, the data input display section at the lower left of the screen displays "Squeegee A pushing amount: mm (data has been set. Note that it has not been input at this time)", and at the lower right of the screen. Each operation switch section of the “numeric keypad” is displayed.

Then, the operator inputs a desired pushing amount (for example, 2.0 mm) into the data input display section using the ten-key pad, and touches the "setting" operation switch section at the lower right of the screen, The operation switch portion for the "squeegee A push amount" is displayed as "2.0 mm", the lighting is released, and the result is stored in the RAM 54. Similarly, touch the operation switch of "Squeegee B push amount" and use the "numeric keypad" to obtain the desired push amount (for example, 2.0 mm).
Set. Note that the right and left squeegees do not necessarily have to have the same set push-in amount.

Further, when the "Page feed" operation switch portion of the screen of FIG. 13 is touched, print data (not shown) for setting moving speed data of the squeegee 9 and print range data of the screen plate 7 (substrate 2), for example. The screen is displayed. The operation will be described below. First, the operator performs a setting operation of a moving distance to the substrate upper surface level when the squeegee descends before starting the printing operation. That is, the worm 47 of the squeegee angle adjusting mechanism is rotated, and when the current squeegee angle of the squeegee 9 detected by the encoder 49 and displayed on the display device reaches a desired angle, the rotation of the worm 47 is stopped. This operation is performed on the right and left squeegees 9.

Next, after placing the substrate 2 on the mounting table 3, the mounting table 3 is raised to the printing position and the screen 6
Is moved to the substrate side. As a result, the squeegee 9 is lowered with respect to the substrate 2 prepared at the printing work position. For example, as shown in FIG. 4, an operator supplies air to the squeegee up / down air cylinder 10 on the left side to lower the squeegee 9 on the left side, and the printing pressure by the squeegee 9 via the drive motor 18 becomes the set printing pressure. The load cell 41 is lowered until it is detected. The position where the squeegee 9 contacts the substrate 2 via the screen plate 7 and the printing pressure reaches the set printing pressure is the position where the substrate upper surface level becomes zero. Then, the descending moving distance of the squeegee 9 to the substrate upper surface level is calculated by the calculating device in the CPU 53 based on the pulse number of the drive motor 18, and is stored in the RAM 54 as moving distance data. Similarly, the movement distance data is set by the squeegee 9 on the right side, and the substrate 2 is removed from the mounting table 3. In this way, after the squeegee angle is adjusted, the movement distance data setting operation when the squeegee 9 descends to the substrate upper surface level is performed before the printing operation starts.

When the setting of the movement distance data for the squeegee 9 adjusted to the desired angle as described above is completed, the automatic operation is started. First, the screen printer 1 is turned on to display the initial screen of FIG. 7 on the screen of the CRT 57,
The operation switch section of "production operation" on this screen is touched to display the production operation (stopped) screen of FIG. When the start key 58 of the operation unit 60 is touched while this screen is displayed, the screen is switched to the screen during the production operation and the production operation is started.

When the production operation is started and the substrate 2 transferred from the upstream side apparatus by the conveyor is positioned above the mounting table 3 below the transfer level of the supply conveyor, the conveyor is stopped. Next, the mounting table 3 is raised above the transfer level by the cylinder 5, and the substrate 2 is mounted on the table 3 in a positioned state.

The squeegee 9 on the left side in FIG. 3 is C
It is lowered onto the substrate 2 by the squeegee up / down cylinder 10 and the drive motor 18 which are driven by a command from the PU 53. That is, at this time, the moving distance data (squeegee 9 is the screen plate 7) stored in the RAM 54 as described above.
Pressing amount set by the "squeegee B pressing amount" on the screen of the print data, for the moving distance to the substrate upper surface level where the printing pressure when contacting the substrate 2 via 2.0 mm) after the drive motor 18 is driven,
The squeegee 9 is driven by the squeegee up / down air cylinder 10 on the left side through the squeegee mounting body 34 at the set printing pressure (for example, 5.0 kgf) set by the "printing pressure selection (left side)" on the screen of the print data. A command is issued to the electropneumatic regulator 12 via the regulator controller 14 so as to lower the air, and the air supplied to the cylinder 10 is adjusted by the regulator 12, so that the squeegee 9 moves to the screen plate 7.
It is brought into contact with the substrate 2 via. At this time, the squeegee 9 comes into contact with the substrate side during the stroke end of the cylinder 10 and cannot be further lowered, and the piston (not shown) above the rod 27 is lifted from the stroke end of the cylinder 10 by the amount pushed. Stop at.

Then, the squeegee 9 is moved to the right in FIG. 3 at a desired speed by driving the drive motor, so that the cream solder supplied onto the screen plate 7 is passed through the opening formed in the plate 7. Printing on one side on the substrate 2. During this printing operation, the squeegee 9 is actuated by the motor 18 so as to further lower the desired pressing amount (for example, 2.0 mm) from the reference level based on the squeegee B pressing amount data set on the screen of FIG. Even if there is a warp in 2, the solder paste can be printed without being scratched.

After printing is completed, the squeegee 9 is removed from the substrate 2.
Also, when the screen 7 rises, there is no restriction on the substrate side, so the piston that has been lifted from the stroke end of the cylinder 10 by the amount of pushing down moves down due to the action of air pressure, so the squeegee 9 descends and the squeegee 9 moves to the screen plate 7. Since the screen plate 7 is not shaken because it is separated from the substrate 2 while pressing, the cream solder printed on the substrate comes out from the opening of the screen plate 7 in a clean form. Subsequently, the mounting table 3 is lowered by the cylinder 5 below the carrying level, and the substrate 2 is discharged by the discharge conveyor. Even in a structure in which the screen side is fixed and the substrate side is lowered, or both the substrate side and the screen side are separated from each other to separate the substrate 2 and the screen plate 7, the squeegee is pushed by the pushing amount. Moves while holding down the screen plate 7, so that the screen plate 7 does not shake or violate.

During this printing operation, the CPU 53 counts the number of pulses of the moving distance of the drive motor, so that the load cell 41 is moved every time the squeegee 9 reaches a desired position.
Thus, the printing pressure at that time is detected and the printing pressure value is displayed on the amplifier 71. Then, the average value of the detection values of the plurality of points is stored in the RAM 54 and fed back at the time of the next printing operation. That is, the deviation amount between the printing pressure data set in the RAM 54 and the average value is calculated from the detection result detected at the time of printing, and when the printing is performed again using the squeegee 9 on the left side, the deviation amount is corrected. Therefore, CPU
Reference numeral 53 controls the electromagnetic valve 12A of the electropneumatic regulator 12 via the regulator controller 14 to adjust the printing pressure.

Thereafter, the printing operation is continued in the same manner.
The case of one-sided printing has been described above, but the same applies to reciprocal printing on one substrate 2. Further, in this embodiment, after the squeegee angle is changed by switching the model, the movement distance data is set by the squeegee 9 when the squeegee 9 descends to the substrate upper surface level before the printing operation is started. By storing the moving distance data for all the squeegee angles to be stored in the RAM 54, and providing the operation switch unit for designating the squeegee angle in the print data shown in FIG. 11 and the like, and designating the desired squeegee angle when changing the model. It may be possible to select the moving distance data when descending, which eliminates the need to perform the setting operation of the moving distance data every model change.

Further, one piece of moving distance data for the reference squeegee angle is obtained and stored in the ROM 55, and when the squeegee angle is changed by changing the model, the squeegee angle of the squeegee 9 is adjusted through the squeegee angle adjusting mechanism. The operation switch unit for designating the squeegee angle is provided in the print data shown in FIG.
The squeegee angle is specified on the screen. Then, as shown in FIG. 14, a reference angle of a certain squeegee 9 (for example, an angle shown by a dotted line in FIG. 14) and a squeegee angle used this time (see FIG. 1).
4, the CPU 53 calculates a height position (h) with respect to the substrate 2 with respect to the angle (shown by the solid line), and the calculated height data is added to the reference movement distance data, so that the substrate upper surface level becomes zero. The position may be determined, and such a configuration is particularly effective in a printing machine having a function of automatically changing the squeegee angle. The formula for obtaining the height position h is

[0039]

[Equation 1]

The value obtained by adding the calculated height position data to the reference moving distance data is the moving distance with respect to the squeegee 9.

[0041]

As described above, according to the present invention, the setting operation of the pushing amount of the squeegee is simplified, the operation stop time during the setting operation is shortened, and the productivity is improved. Further, by setting the movement distance data up to the substrate upper surface level for all the squeegee angles to be used in advance, it is not necessary to perform the movement distance data setting operation every model change, and the productivity is further improved.

[Brief description of drawings]

FIG. 1 is a configuration circuit diagram of a screen printing machine.

FIG. 2 is a configuration circuit diagram of a printing pressure adjustment mechanism.

FIG. 3 is a front view of the screen printing machine.

FIG. 4 is a front view showing a vertical movement mechanism of a squeegee.

FIG. 5 is a plan view showing a vertical movement mechanism of a squeegee.

FIG. 6 is a side view showing a vertical movement mechanism of a squeegee.

FIG. 7 is a diagram showing a screen displayed on a CRT.

FIG. 8 is a diagram showing a screen displayed on a CRT.

FIG. 9 is a diagram showing a screen displayed on a CRT.

FIG. 10 is a diagram showing a screen displayed on a CRT.

FIG. 11 is a diagram showing a screen displayed on a CRT.

FIG. 12 is a diagram showing a screen displayed on a CRT.

FIG. 13 is a diagram showing a screen displayed on a CRT.

FIG. 14 is a diagram showing a height positional relationship between a reference squeegee angle and a designated squeegee angle with respect to a substrate.

[Explanation of symbols]

 1 Screen Printer 2 Printed Circuit Board 7 Screen Board 9 Squeegee 10 Squeegee Up / Down Air Cylinder 11 Compressed Air Supply Source 12 Electro-Pneumatic Regulator 41 Load Cell 53 CPU 54 RAM

Claims (2)

[Claims] 1. A screen printing machine for printing a coating material on a screen plate through a squeegee onto a printed circuit board, and stores the amount of push-in data from the upper surface level of the squeegee during the printing operation on the substrate. Storage device,
A drive mechanism that can move the squeegee up and down with respect to the printing surface and can adjust the amount of depression when descending, and controls the amount of depression of the squeegee by the drive mechanism based on the amount of depression data stored in the storage device. A screen printing machine comprising a control device. 2. A screen printing machine for printing a coating material on a screen plate on a printed circuit board via a squeegee, and a squeegee angle adjusting mechanism for adjusting the mounting angle of the squeegee, and the squeegee on the printing surface. A drive mechanism that can move up and down, and a calculation device that calculates a movement distance when the squeegee adjusted to a desired angle by the squeegee angle adjustment mechanism before the printing operation moves to the substrate upper surface level by the drive mechanism. A storage device that stores movement distance data for each squeegee adjusted to various angles calculated by the calculation device and also stores pushing amount data from the substrate upper surface level of the squeegee during a printing operation on the substrate. A designating device for designating a squeegee angle adjusted by the squeegee angle adjusting mechanism, and a squeegee designated by the designating device. A control device for controlling the squeegee lowering operation by the drive mechanism based on the movement distance data and the pushing amount data obtained when the squeegee is lowered when the angle is adjusted, which is stored in the storage device when the printing operation is performed at an angle. A screen printing machine characterized by having and.