JPH0745941A - Apparatus and method for spray-type coating with flux - Google Patents

Abstract

PURPOSE:To obtain a spray-type flux coating apparatus in which a wiring board is coated uniformly with a flux, to eliminate the contamination of the wiring board and the spray-type flux coating apparatus with the flux and to enhance the productivity of the coating apparatus. CONSTITUTION:In a spray-type flux coating apparatus 30, a misty flux 10 is jetted from a spray nozzle 7 to a wiring board 1 conveyed in the X-direction, and the wiring board 1 is coated. The coating apparatus is provided with a Y-direction actuator 31 which moves the spray nozzle 7 back and forth in the Y-direction which crosses the X-direction as the conveyance direction of the wiring board 1 and with an X-direction actuator 34 which moves the spray nozzle 7 in the X-direction simultaneously with the movement in the Y-direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray type flux coating device and a coating method for coating a wiring board with a sprayed mist-like flux.

[0002]

2. Description of the Related Art In soldering a wiring board, when flux is applied, excess flux is applied.
The wiring board is polluted, and the surrounding devices are contaminated by the scattering, and unnecessary flux residue is increased.

FIG. 11 is a plan view showing an example of a conventional spray type flux coating apparatus, and FIG. 12 is a side view of FIG. In FIG. 11, the flux supply system, the air supply system, and the control system are shown in a block diagram. In these figures, 1 is a wiring board, and 2 is the entire spray type flux coating apparatus. 3 is a conveyer conveyor, 4 is a drive roller, 5 is a motor, 6 is a guide roller, 7 is a spray nozzle, and 8 is the spray nozzle 7 which intersects the transport direction of the wiring board 1 (arrow X direction, hereinafter simply referred to as X direction). A slider 9 is attached to the actuator 8 by an actuator that moves the actuator 8 in the direction (arrow Y direction, hereinafter simply referred to as Y direction).

Reference numeral 10 denotes a mist-like flux ejected from the spray nozzle 7, which is shown in FIG. 11 as a spray range (hatched portion of an ellipse) for the wiring board 1. Reference numeral 11 denotes a control unit of the spray type flux coating device 2, which is composed of a microcomputer system. Reference numeral 12 is an air supply device for ejecting the atomized flux 10 by the air pressurized from the spray nozzle 7, 13 is a flux supply device, 14 and 15 are solenoid valves, 16 is a wiring board entry detection sensor, and 17 is a wiring board width. The detection sensor is attached to the transfer conveyor 3 on the side where the width of the wiring board 1 is moved and adjusted in the Y direction. Reference numeral 18 denotes a detection piece for the spray nozzle 7 to detect the width of the wiring board 1, which is fixed to the slider 9 and moves in the Y direction. Reference numeral 19 is a rotary encoder of the motor 5, 20 is an operation unit for operating the spray type flux coating apparatus 2, and 21 is the spray type flux coating apparatus 2.
A hood that collects the mist-like flux 10 inside is connected to a dust collector (not shown) and sucks and captures unnecessary mist-like flux 10.

Further, S _P is the wiring board entry sensor 16
When the wiring board 1 detects the entrance of the wiring board 1, the wiring board entry detection signal (hereinafter simply referred to as the entry detection signal), S _W, the detection piece 18 moves in the Y direction and is detected by the wiring board width detection sensor 17. When the wiring board width detection signal (hereinafter, simply referred to as width detection signal), S _B is the wiring board 1
The transport signal output from the rotary encoder 19 for obtaining the transport distance of S, S _E is the slider 9 of the actuator 8.
Further, an origin signal indicating that the spray nozzle 7 is at the origin position is output by a sensor provided in the actuator 8. S _A is an air supply control signal for supplying air for ejecting the atomized flux 10 from the spray nozzle 7, and S _F is the atomized flux 1 to the spray nozzle 7.
A flux supply control signal for supplying 0, S _S is a swing control signal of the spray nozzle 7, L _AIR is a pipe length from the solenoid valve 14 to the spray nozzle 7, and L _FLUX is a pipe length from the solenoid valve 15 to the spray nozzle 7. Is.

FIG. 13 is a side view showing a schematic structure of the actuator 8 of FIG. 11, and the same reference numerals as those in FIG. 11 denote the same parts, 22 is a stepping motor, 23 is a timing belt, 24 is a driving roller, and 25 is a driven roller. Is. The position of the slider 9 is controlled and determined by the number of pulses supplied to the stepping motor 22, that is, the number of swing control signals S _S.

FIG. 14 is an explanatory view showing the trajectory of the mist-like flux 10 ejected from the spray nozzle 7 as seen from the wiring substrate 1 and the spray region. The same reference numerals as those in FIG.
L _PL is the length of the wiring board 1 in the X direction of the transfer direction, L _PW
Is the width of the wiring board 1, L _A is the movement amplitude of the spray nozzle 7, L _S is the spray section, and L _S1 and L _S2 are the spray nozzles 7.
Stop section of mist-like flux 10 from L _D1 , L
_D2 is an ineffective spray section of the atomized flux 10 from the spray nozzle 7, v _p is a transport speed of the wiring substrate 1 in the X direction, and v _s is a moving speed of the spray nozzle 7 in the Y direction.

A known structure may be used for moving the spray nozzle 7 in the Y direction (for example, Japanese Patent Laid-Open No. 4-5917).
See Japanese Patent Laid-Open No. 0-59171 and Japanese Patent Laid-Open No. 4-59171. In addition, Japanese Patent Application Laid-Open No. 4-59169 discloses a technology for supplying a flux, and Japanese Patent Application Laid-Open No. 4-377758 discloses a technology for preventing clogging of a spray nozzle. ).

Next, the operation will be described. Since the control unit 11 is composed of a microcomputer system, its control can be realized by software. FIG. 15 is a flow chart showing the types of control of the spray type flux coating device 2 of FIG.
(4) shows each control block. When the operation unit 20 of FIG. 11 is started, drive control of the actuator 8 (1), drive control of the air supply device 12 (2), flux supply device 1
3 of the wiring board 1 in the transport direction X and in the width direction Y
Direction control (3), (4) is performed. Then, after the completion of these operations, the process returns to the point of starting again.

Next, referring to FIG. 11, the actuator 8 is
The drive control block (1) will be described. When the wiring board 1 is transported in the X direction by the transport conveyor 3 and enters the position of the wiring board entry detection sensor 16, the entry detection signal _SP becomes "H" level (logic level). this"
When the carrier signal S _B of the rotary encoder 19 is counted for a predetermined number of pulses N ₁ after it becomes H ″, the swing control signal S _S is output and the spray nozzle fixed to the slider 9 of the actuator 8 is output. 7
It reciprocates over the range of movement, that is, the entire length of the movement amplitude L _A in FIG.

Next, after the approach detection signal S _P becomes "L" level (logic level), the carrier signal S _B is counted by a predetermined number N ₂ which is determined in advance,
The spray nozzle 7 is returned to the origin position. Then, at this time, the origin signal S _E is generated. Here, the count number N
₁ and N ₂ are the numbers of pulses of the carrier signal S _B corresponding to the distance in the carrier direction between the approach detection signal S _P and the spray nozzle 7, and normally N ₁ = N ₂ .

Next, the drive control block (2) of the air supply device 12 will be described. Approach detection signal _SP is "H"
After that, when the carrier signal S _B is counted by a predetermined number N ₃ which is determined in advance, the air supply control signal S
_{A is set} to "H", the solenoid valve 14 is opened, and the pressurized air from the air supply device 12 is ejected from the spray nozzle 7. Then
When the approach detection signal S _P becomes “L”, the carrier signal S _B is counted by a predetermined number N ₄ which is determined in advance, and then the air supply control signal S _{A is set} to “L”.
To stop the air blow. Count number N ₃ here
Is N ₃ <N ₁ and ejects air before the actuator 8 is driven. Further, the count number N ₄ is N ₄ > N ₂ , and the ejection of air is stopped after the spray nozzle 7 of the actuator 8 has started the home-return operation.

Next, the wiring board of the flux supply device 13
The control block (3) in the X direction for 1 will be explained.
It Approach detection signal S_P Becomes "H" and the swing control signal
Issue S _S The predetermined count number N_Five If you count up to hula
Control signal S_F Solenoid valve with "H" level
15 is opened and the atomized flux 10 is ejected. Next
Then, the approach detection signal S_P Becomes "L", and the carrier signal S_B To
A predetermined count number N determined in advance₆ Count
Fara, flux supply control signal S_F To "L" level
And close the solenoid valve 15 to stop the ejection of the atomized flux 10.
Stop. Also, the count number N_Five The number of pulses of the spray nozzle
Spray stop section L during swing 7_S1Swing equivalent to
Time control signal S_S The number of pulses, and the count number N₆ 
Is N₆ = N₂ Is.

Next, regarding the block (4) for controlling the wiring board 1 of the flux supply device 13 in the Y direction, when the swing control signal S _S is output by a predetermined count N ₇ pulses, the flux supply control signal S _F is set. Set to "H".
That is, ejection of the atomized flux 10 is started. The count number N ₇ is the distance L _S1 shown in FIG.
Equivalent to. Next, the detection plate 18 reaches the width detection sensor 17 as the spray nozzle 7 moves, and the width detection signal S
_{When W} becomes "H", the detection plate 18 passes the width detection sensor 17 and the width detection signal _SW becomes "L" level, the flux supply control signal _{SF is set} to "L". That is, when the flux supply control signal S _F becomes “L”, ejection of the mist-like flux 10 is stopped. Next, when the spray nozzle 7 moves by folding back the section L _S2 shown in FIG. 14 and the detection plate 18 reaches the width detection sensor 17 and the width detection signal _SW becomes “H”, the flux supply control signal. S _{F is set} to “H” to start ejection of the mist-like flux 10. Subsequently, when the swing control signal S _S is output by the predetermined count number N ₈ , the flux supply control signal S S
_{F is set} to "L" and the ejection of the mist-like flux 10 is stopped. Then, when the spray nozzle 7 reaches the origin position, it returns to the original position again and repeats the above operation. Here, the number of counts N ₇ = N ₅ , and the number of counts N ₈ is the number of pulses during which the ejection of the first mist-like flux 10 is started and then stopped, and the atomization shown in FIG. Section L
Equivalent to the distance of _S.

By controlling as described above, the atomized flux 10 can be sprayed and applied to the wiring board 1.

[0016]

By the way, as shown in FIG. 14, the above-mentioned conventional spray type flux applicator, when it is attempted to uniformly apply the atomized flux 10 to the wiring board 1, the ineffective spray section L _D1 , L _D2 are required. This is because the solenoid valves 14 and 15 are opened after the flux supply control signal S _F and the air supply control signal S _A become “H”, and the atomized flux 10 is ejected from the spray nozzle 7 and the wiring board 1 This is because there is a time lag before reaching, and each pipe length L _AIR , L _FLUX shown in FIG.
Is longer, this time lag increases. For this reason, the mist-like flux 10 in this section is applied to the wiring board 1 in a small proportion and is sprayed in the surrounding area in a large proportion. So to speak, it was necessary to spray wastefully in order to apply it uniformly.

Therefore, since the atomized flux 10 is wastefully used, not only the amount of flux used increases, but also the maintenance tact for cleaning or replacing the filter of the dust collector, that is, the maintenance interval is short. Become. In addition, the mist-like flux 10 easily wraps around the upper surface of the wiring board 1, and the upper surface of the wiring board 1 is easily contaminated. Further, in order to improve productivity, it is necessary to increase the transport speed v _p of the wiring board 1. However, in order to maintain the uniformity of flux application, it is necessary to increase the moving speed V _S of the spray nozzle 7 accordingly. However, there is a problem in the movement performance of the actuator 8 as described later.

On the other hand, in order to improve the uniformity of coating, the amount of spray from the spray nozzle 7 per unit time may be reduced and the number of times of repeated coating on the wiring board 1 may be increased. However, for that purpose, the moving speed V _{S of the} spray nozzle 7
If the value is set to a value up to now, it is necessary to reduce the transport speed V _p of the wiring board 1. However, this reduces productivity. Further, if the transport speed V _p of the wiring board 1 is set to be the same as the conventional moving speed, it is necessary to increase the moving speed V _S of the spray nozzle 7. However, this has a limit in motion performance due to physical stress due to inertia of the moving system of the spray nozzle 7, and thus there is a limit in speeding up. In addition, as the speed increases, the spray nozzle 7
The mist-like flux 10 ejected from the rack is shelved, which adversely hinders uniform coating properties and increases the amount of wasted flux that is not coated on the wiring board 1.

That is, it has been difficult to achieve both improved productivity and coating performance of thinly and uniformly applying the atomized flux 10.

On the other hand, in order to reduce the wasteful flux by shortening the ineffective spray sections L _D1 and L _D2 , the solenoid valve 1
It is possible to shorten the time lag by shortening the piping lengths L _AIR and L _FLUX of air and flux between the spray nozzles 4 and 15 and the spray nozzle 7.

16 and 17 are schematic structural views for explaining the arrangement structure of the spray nozzle 7 and the solenoid valves 14 and 15.

That is, as can be seen from FIG. 16, since the spray nozzle 7 reciprocates in the Y direction, the solenoid valve 14,
There is a natural limit to shortening the pipe lengths L _AIR and L _FLUX between the pipes 15 and. It is also possible to dispose the spray nozzle 7 and the solenoid valves 14 and 15 integrally as shown in FIG. 17, but this increases the inertia of the moving system and increases the physical stress applied to the actuator 8. As a result, the movement performance of the actuator 8 decreases. Also,
The solenoid valves 14 and 15 need to have an explosion-proof structure.

The present invention has been made in order to solve the above-mentioned conventional problems, and suppresses the waste of flux, reduces the burden of capturing unnecessary flux by the dust collector, and applies the flux thinly and uniformly. It is an object of the present invention to obtain a spray-type flux coating device and a coating method that both improve productivity. At the same time, it is an object of the present invention to obtain a spray type flux coating device with low running cost.

[0024]

A spray-type flux coating apparatus according to the present invention is a Y-direction actuator that reciprocates a spray nozzle in a Y direction intersecting the X direction, and an X-direction actuator that moves a spray nozzle in the X direction. It is equipped with and.

Further, in the spray-type flux coating method according to the present invention, the spray nozzle is reciprocated in the Y direction intersecting the X direction in which the wiring board is carried, and the spray nozzle is moved at a speed higher than the carrying speed of the wiring board. The flux is uniformly applied to the wiring substrate by moving in the X direction at a slow speed.

[0026]

In the present invention, the spray nozzle for spraying the mist-like flux onto the wiring board is reciprocally moved by the Y-direction actuator in the Y-direction intersecting the X-direction of the wiring board conveyance direction, and at the same time, By moving the Y-direction actuator in the X-direction, it is possible to relatively change the transport speed of the wiring substrate with respect to the spray nozzle, and it is possible to slow or increase the apparent transport speed. That is, if the apparent transport speed is slowed, the number of times of repeated coating can be increased without increasing the Y-direction reciprocating speed of the spray nozzle.
Therefore, the mist-like flux is uniformly applied to the wiring board.

That is, even if the transport speed of the wiring board is increased,
The moving speed of the wiring board viewed from the spray nozzle can be maintained or decelerated to a low value. Therefore, the invalid spray sections L _D1 and L _D2 shown in FIG. 14 can be significantly shortened. This is because even if the reciprocating speed of the spray nozzle in the Y direction is slowed, it is possible to carry out overcoating equal to or more than before, and the influence of the time lag can be reduced. .

[0028]

1 is a plan view showing an embodiment of the present invention, in which a flux supply, an air supply and a control system are shown in a block diagram. FIG. 2 is a side view of FIG. In these figures, the same symbols as in FIG. 11 indicate the same parts. Three
0 indicates the entire spray type flux coating device, 31 indicates Y
The directional actuator moves the spray nozzle 7 in the Y direction via the slider 32. 33 is the spray nozzle 7
Is a detection piece for detecting the width L _PW of the wiring board 1, and 34 is the Y
An X-direction actuator that moves the direction actuator 31 in the X-direction, which is the transport direction of the wiring board 1, has a shaft 36 extending in the X-direction, a bearing 37 is slidably mounted on the shaft 36, and a slider is mounted on the bearing 37. The Y-direction actuator 31 is integrally attached via 35. 38A and 38B are a light emitting element and a light receiving element.
A wiring board width detection sensor is constituted by 8A and 38B. That is, the wiring board 1 is attached to the transfer conveyor 3 on the side that is moved and adjusted in the Y direction according to the width L _PW of the wiring board 1. Three
Reference numeral 9 denotes a control unit of the spray type flux coating device 30, 40
Is an operation unit for controlling the control unit 39.

Further, S _EY is an origin signal in the Y direction of the spray nozzle 7, S _EX is an origin signal in the X direction of the spray nozzle 7, and S _SY is a drive pulse signal and a drive direction in the Y direction of the spray nozzle 7. A signal (hereinafter simply referred to as a drive signal), S _SX, is a drive pulse signal and a drive direction signal (hereinafter simply referred to as a drive signal) in the X direction of the spray nozzle 7.

Since the control unit 39 is composed of a microcomputer system, its control can be realized by software.

Next, the operation of the embodiment shown in FIGS. 1 and 2 will be described with reference to FIGS. FIG. 3 is a block diagram showing types of control procedures of the spray type flux coating device 30 of FIG. 1, and (1) to (6) show respective blocks. When the operation unit 40 is started, the length L _PL in the X direction with respect to the wiring board 1 is measured (1), the drive control of the Y direction actuator 31 (2), the drive control of the X direction actuator 34 (3).
Drive control of the air supply device 12 (4), control of the flux supply device 13 in the X direction with respect to the wiring board 1 (5), control of the flux supply device 13 in the Y direction with respect to the wiring board 1
(6) is performed. Then, after the completion of these operations, the operation returns to the time point when the operation is restarted.

FIG. 4 is a flowchart showing the procedure for measuring the length L _PL of the wiring board 1 in the block (1) of FIG. 3, in which (1) to (4) show respective steps. First, whether now entered the detection signal S _P is "H", i.e., whether or not the wiring board 1 enters determined in the step (1) (1),
If YES, the process proceeds to step (2), the counter is cleared, the count value N _p , that is, the number of pulses corresponding to the length L _PL of the wiring board 1 in the X direction is set to 0, and the carrier signal is sent in step (3). Start counting S _B. In addition, step
If the approach detection signal S _P is “L” in (1), the step is
Wait for the wiring board 1 to enter at step (1). Then, whether it is the entry detection signal S _P is "L" is determined in the step (4)
(4) If YES, the process returns to step (1) to wait for the next wiring board to enter, and if NO, the process returns to step (3) to continue counting the transport signal S _B.

FIG. 5 shows block (2) of FIG. 3, namely Y.
In the flow chart showing the procedure of drive control of the directional actuator 31, (1) to (5) show respective steps. First, to determine what happened to the entry detection signal S _P is "H" (1)
, YES, the carrier signal S _B is counted by a predetermined count number N ₉ (2), and if NO, the process returns to step (1) to wait for the wiring board 1 to enter.

Here, the predetermined count number N ₉ is the number of pulses of the carrying signal S _B corresponding to the distance in the carrying direction between the wiring board entry detection sensor 16 and the spray nozzle 7 of FIG. Then, the Y-direction actuator 31 is driven to reciprocate for a full span. That is, the drive pulse signal and drive direction signal S _SY for that purpose are output. The pulse rate (repetition frequency) is determined by the moving speed v _S of the spray nozzle 7 in the Y direction (3). That is, in step (3), the control unit 3
Drive signal S _SY of the Y-direction actuator 31 output by 9
Moving speed v of the spray nozzle 7 in the Y direction depending on the pulse rate of
_S can be set arbitrarily by a program. Next, the carrier signal S _B is counted by the count value N. That is, the count value N is N = N _P · v _p / (v _p −v
_Sp )). Here, v _Sp is the moving speed of the spray nozzle 7 in the X direction. When the count value N reaches the value given by the previous equation, the process proceeds to step (5), the Y-direction actuator 31 is returned to the origin position (5), and then the process returns to step (1) to proceed to the next wiring. Wait for the board 1 to enter.

FIG. 6 is block (3) of FIG. 3, namely X.
(1) to (5) show respective steps in the flowchart showing the procedure of drive control of the directional actuator 34. First, it is determined whether or not the wiring board entry signal _SP becomes "H".
(1) If YES, the carrier signal S _B is counted by a predetermined count number N ₉ which is determined in advance (2). Then X
The direction actuator 34 is driven in the substrate transfer direction. That is, the drive pulse signal and the drive direction signal S _SX are output, and the pulse rate is determined by the relative speed V _Sp (3). Here, the relative velocity V _Sp and moving velocity v _p of the wiring substrate 1, the difference between the moving velocity v _Sp in the X direction of the spray nozzle 7, V _Sp =
(V _p −v _Sp ). Then, the process proceeds to step (4) and the carrier signal S _B is counted by the count value N. That is, the count value N is a value given by N = N _P · v _p / (v _p −v _Sp ) (4). When the count value N reaches the value given by the previous equation, the process proceeds to step (5), where X
The directional actuator 34 is returned to the origin position (5), and then the process returns to step (1) to wait for the next entry of the wiring board 1.

FIG. 7 is a flow chart showing the block (4) in FIG. 3, that is, the means for controlling the drive of the air supply device 12, and (1) to (4) show respective steps. First, Y direction and X
It is judged in step (1) whether the drive signals S _SY and S _{SX of the} directional actuators 31 and 34 are output (1), and Y
If it is ES, the process proceeds to step (2), the air supply control signal S _{A is set} to "H", the solenoid valve 14 is opened, and air is ejected from the spray nozzle 7. If NO, the process returns to step (1) to wait for the output of drive signals S _SY and S _SX . Next, Y direction, X
It is judged in step (3) whether or not the origin signals S _EY and S _{EX of the} directional actuators 31 and 34 are “H” (3), and YE
If S, move to SYTE-P (4), set the air supply control signal S _A to "L", close the solenoid valve 14 to stop air ejection (4), and then return to step (1). , And then waits for the drive signals S _SY and S _{SX to} be output. On the other hand, if NO, the process returns to step (3) and the drive signals S _SY and S _SX are “H”.
Wait until

FIG. 8 is a flow chart showing the procedure of block (5) of FIG. 3, that is, the control of the flux supply device 13 in the X direction with respect to the wiring board 1, and (1) to (5) show respective steps. First, it is judged in step (1) whether or not the approach signal _SP is "H". If NO, wait until the wiring board enters (1), and if YES, move to step (2). Then, it is determined whether or not the drive signal S _SY of the Y-direction actuator 31 has been output the predetermined count number N ₁₀ (2). If YES, the flux control signal S _{F is set} to "H" and the solenoid valve 1
5 is opened, the atomized flux 10 is ejected (3), and if NO, the process returns to step (2) and waits until the drive signal S _SY is output to the predetermined count value N ₁₀ . Then step (3)
Then, the carrier signal S _B is counted by the count value N. That is, the count value N is N = N _P · v _p / (v _p
-V _Sp ) (4). Next, the flux supply control signal S _{F is set} to “L”, the electromagnetic valve 14 is closed, and the ejection of flux is stopped (5). And step
Return to (1) and wait until the next wiring board 1 enters.

The count number N _{10 in} step (2) is
It is the number of pulses of the S _SY signal corresponding to the sum of the distance L _S1 and the distance L _D1 shown in FIG. That is, in this embodiment,
After the spray nozzle 7 reaches the end of the wiring board 1, the spray of the atomized flux 10 is started. That is, the invalid spray section L _D1 is not actually provided.

9 and 10 are block (6) of FIG. 3, that is, Y for the wiring board 1 of the flux supply device 13.
In the flow chart showing the procedure of direction control, (1) ~ (10)
Indicates each step. First, in FIG. 9, step
In (1), it is judged whether or not the drive signal S _SY of the Y-direction actuator 31 is output by the predetermined number N _{10 of} pulses (1). If YES, the flux supply control signal S _{F is set} to “H” and the solenoid valve 15 is turned on. Open and spray atomized flux from spray nozzle 7
Gush out. Subsequently, the process proceeds to step (3), it is determined whether the width detection signal _SW is "H", and if YES, the step
Proceed to (4). If NO, return to step (3) and click "H".
Wait until. Next, in step (4), it is judged whether or not the width detection signal _SW is "L", and if YES, then FIG.
If it is NO, the process returns to step (4) and waits until it becomes "L".

Next, in step (5) of FIG.
Solenoid valve 15 with flux supply control signal S _{F set} to “L”
Is closed, and the ejection of the atomized flux 10 is stopped. Then, the process proceeds to step (6), and it is determined whether the width detection signal _SW is "H" (6). If YES, step (7)
Then, the flux supply control signal S _{F is set} to “H”, the solenoid valve 15 is opened, and the atomized flux 10 is ejected (7).
, NO, it returns to step (6) and waits until it becomes "H". Next, in step (8), it is judged whether or not the drive signal S _SY of the Y-direction actuator 31 has been output by the predetermined pulse number N ₁₁ (8), and if YES, the process proceeds to step (9) to control the flux supply. The signal S _{F is set} to “L”, the solenoid valve 15 is closed, and the ejection of the atomized flux 10 is stopped.
(9) If NO, step until N _{11 is} output
Wait at (8). Next, at step (10), it is judged at step (10) whether or not the origin signal S _EY of the Y-direction actuator 31 is output, and if YES, the step of FIG.
Return to (1) and wait until the Y-direction actuator 31 starts moving again. If NO, return to step (10), S
Wait until _EY is output.

The number of pulses N ₁₁ in step (8) is the number of pulses of the S _SY signal from when the atomizing flux 10 is sprayed in step (2) until it is stopped in step (5). Is. That is, in this embodiment, the invalid spray sections L _D1 and L _D2 shown in FIG. 14 are not provided.

In step (3) of FIG. 6, as a special example, the X-direction actuator 34 may be moved in the direction opposite to the X-direction. In this case, the moving speed of the spray nozzle 7 in the X-direction is ( -V _SP ). Therefore, the atomizing nozzle 7 can also spray the atomized flux 10 onto the wiring substrate 1 while moving in a direction opposite to the moving direction of the wiring substrate 1. Such an example is effective when the transport speed v _P of the wiring board 1 is extremely slow as compared with the normal transport speed, and is an example required to obtain the same conditions as in the case of the normal transport speed. Is.

[0043]

As described above, in the spray type flux coating apparatus and coating method according to the present invention, the spray nozzle is set to X
A Y-direction actuator that reciprocates in the Y-direction that intersects the direction, and an X-direction actuator that moves the spray nozzle in the X-direction, and move the spray nozzle in the Y-direction that intersects the X-direction in which the wiring board is transported. While reciprocating, the flux is evenly applied to the wiring board by moving the spray nozzle in the X direction at a speed slower than the speed at which the wiring board is transported, so that a significant improvement in productivity can be realized. At the same time, the atomized flux can be thinly and uniformly applied to the wiring board. That is,
The coating performance is improved. In addition, since the spout of excess flux is extremely reduced, unnecessary flux adhesion to the wiring board is reduced, and clean application can be performed. Along with this, the amount of flux used becomes smaller than in the past, and wasteful use of flux is eliminated, facilitating maintenance of the dust collector of the flux, and at the same time downsizing the dust collector. Therefore, there is an advantage that coating with low running cost can be performed while achieving both improvement of productivity and improvement of flux coating performance (thin and uniform).

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a flowchart showing control types of the spray type flux coating device of FIG.

4 is a flowchart showing a procedure for measuring the length of the wiring board in FIG. 3 in the X direction.

5 is a flowchart showing a procedure of drive control of the Y-direction actuator of FIG.

6 is a flowchart showing a procedure of drive control of the X-direction actuator of FIG.

FIG. 7 is a flowchart showing a procedure of drive control of the air supply device of FIG.

8 is a flowchart showing a procedure of controlling the wiring board of the flux supply device of FIG. 3 in the X direction.

9 is a flowchart showing the procedure of controlling the wiring board of the flux supply device of FIG. 3 in the Y direction.

10 is a flowchart showing a procedure of controlling the wiring board of the flux supply device of FIG. 3 in the X direction.

FIG. 11 is a plan view showing an example of a conventional spray type flux coating device.

FIG. 12 is a side view of FIG. 11.

13 is a side view showing a schematic configuration of the actuator of FIG.

FIG. 14 is an explanatory diagram showing a trajectory of a flux ejected from a spray nozzle as seen from a wiring board and a spray region.

FIG. 15 is a flowchart showing control types of the spray type flux coating apparatus of FIG.

FIG. 16 is a schematic configuration diagram illustrating an arrangement structure of a spray nozzle and a solenoid valve.

FIG. 17 is a schematic configuration diagram illustrating an arrangement structure of a spray nozzle and a solenoid valve.

[Explanation of symbols]

 1 Wiring Board 7 Spray Nozzle 10 Fog Flux 30 Spray Flux Coating Device 31 Y-Direction Actuator 34 X-Direction Actuator

Claims (2)

[Claims] 1. A spray-type flux coating apparatus for spraying flux onto a wiring board transported in the X direction from a spray nozzle to apply the flux, in a Y direction for reciprocating the spray nozzle in a Y direction intersecting with the X direction. A spray-type flux coating device comprising an actuator and an X-direction actuator that moves the spray nozzle in the X-direction. 2. The spray type flux coating device according to claim 1, wherein the spray nozzle is reciprocated in a Y direction intersecting an X direction in which a wiring substrate is conveyed, and the spray nozzle is connected to the wiring. A spray-type flux coating method, wherein flux is uniformly coated on the wiring substrate by moving in the X direction at a speed slower than the substrate transport speed.