JPH0824747A - Applicator - Google Patents

Abstract

PURPOSE:To allow an application to judge whether air is supplied to a syringe or not. CONSTITUTION:The compressed air from an air source 50 regulated by a regulator 51 and supplied into a syringe 7 is detected by a supply pressure detecting sensor 54, a solenoid stop valve 52 is opened by a sensor 55 for detecting the pressure in the syringe to supply the compressed air, and the pressure in the syringe 7 is detected a specified time after the start of the supply. The difference between the supply pressure value and pressure value in the syringe detected by the sensors 54 and 55 is calculated by a controller 57, the calculated value is compared with the reference value stored in a storage device by the controller 57, and the application is stopped by the controller 57 based on the compared result.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention adjusts compressed air supplied from an air source to a desired supply pressure by a regulator and supplies the compressed air into a syringe to discharge a coating agent to the tip of a coating nozzle at the bottom of the syringe. The present invention relates to a coating device that coats a coating material on a printed board.

[0002]

2. Description of the Related Art As a conventional technique of this kind, there is one disclosed in the specification attached to the application of Japanese Patent Application No. 4-260361 previously filed by the present applicant. In the case of having a piping path that interlocks with vertical movement and rotation of the syringe in this way, the tube may come off the syringe, or may be bent or bent in the middle, and it may not be possible to supply the predetermined air to the syringe. However, since there is no means for detecting it, there is a risk of manufacturing many defective substrates.

[0003]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a coating device with a self-diagnosis function for judging whether or not a predetermined air supply to a syringe is being reliably performed.

[0004]

Therefore, the invention of claim 1 adjusts the compressed air supplied from an air source to a desired supply pressure by a regulator and supplies the compressed air to the inside of a syringe to apply to the tip of an application nozzle below the syringe. In a coating device that discharges a coating agent and coats the coating agent on a printed circuit board, the supply pressure of compressed air that is provided between the regulator and the syringe and that is regulated by the regulator from the air source and supplied to the syringe is detected. Supply pressure detecting device, an electromagnetic on-off valve provided between the supply pressure detecting device and the syringe, and a pressure in the syringe after a predetermined time has elapsed since the electromagnetic on-off valve was opened to start supplying compressed air. Within the syringe pressure detection device, the supply pressure value detected by the supply pressure detection device and within the predetermined time detected by the syringe pressure detection device A calculation device that calculates the difference between the fringe pressure value, a comparison device that compares the calculation value of the calculation device with a reference value stored in the storage device, and the coating operation is stopped based on the comparison result of the comparison device. And a control device for controlling it.

Further, in the invention of claim 2, compressed air supplied from an air source is adjusted to a desired supply pressure by a regulator and supplied into the syringe to discharge the coating agent to the tip of the coating nozzle below the syringe. In a coating device that coats a coating material on a printed circuit board, a supply pressure detection device that is provided between the regulator and the syringe and that detects the supply pressure of compressed air that is regulated by the regulator from the air source and that is supplied into the syringe. An electromagnetic on-off valve provided between the supply pressure detection device and the syringe, and a syringe internal pressure for detecting the pressure in the syringe after a predetermined time has elapsed since the electromagnetic on-off valve was opened to start supplying compressed air A detection device, a supply pressure value detected by the supply pressure detection device, and a syringe internal pressure value within a predetermined time detected by the syringe internal pressure detection device. A calculating device that calculates the difference, a comparing device that compares the calculated value of the calculating device with a reference value stored in the storage device, and stop the coating operation based on the comparison result of the comparing device and display the same on the display device. A control device for displaying the effect is provided.

[0006]

With the above construction, in the invention of claim 1, the supply pressure detecting device detects the compressed air supplied from the air source by the regulator and supplied into the syringe, and the syringe internal pressure detecting device opens the electromagnetic on-off valve. The pressure in the syringe is detected after a lapse of a predetermined time from the start of operation and supply of compressed air. Next, the difference between the supply pressure value detected by the supply pressure detection device by the calculation device and the syringe internal pressure value within a predetermined time detected by the syringe internal pressure detection device is calculated, and the calculated value is calculated by the comparison device. The reference value stored in the storage device is compared. Then, the controller stops the coating operation based on the comparison result.

According to the second aspect of the present invention, the supply pressure detecting device detects the compressed air which is regulated by the regulator from the air source and is supplied into the syringe, and the in-syring pressure detecting device opens the electromagnetic opening / closing valve. The pressure in the syringe is detected after a lapse of a predetermined time from the start of supplying compressed air. Next, the difference between the supply pressure value detected by the supply pressure detection device by the calculation device and the syringe internal pressure value within a predetermined time detected by the syringe internal pressure detection device is calculated, and the calculated value is calculated by the comparison device. The reference value stored in the storage device is compared. Then, the control device stops the coating work based on the comparison result, and displays the fact on the display device.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. 1 shown in FIG. 2 is an X-axis motor 2 and a Y-axis motor 3
The printed circuit board is placed on the XY table 4 which is moved in the XY direction by driving. Reference numeral 5 is a coating unit for coating an adhesive as a coating agent on the substrate 1, 6 is a coating nozzle for discharging the adhesive to coat the substrate 1 with the adhesive, and 7 is connected above the nozzle 6. Compressed air supplied from an air source 50, which will be described later, is fed into the syringe that stores the adhesive, and the adhesive is discharged from the discharge portion 6A (see FIG. 3) of the nozzle 6.

The coating unit 5 will be described below in detail with reference to FIG. Reference numerals 8 and 9 denote rotor gears and nozzle holders for holding the coating nozzle 6, which are inserted into the insertion holes 10 and 11, respectively. The rotor gear 8 and the nozzle holder 9 are compressed by a buffer mechanism across a pair of recessed portions 12 provided in the lower portion of the rotor gear 8 and a pair of recessed portions 13 provided in the upper portion of the nozzle holder 9 so that there is a predetermined space between them. Spring 14
And the nozzle holder 9
A bolt 15 for guiding the ascent of the (nozzle 6) is inserted from above the rotor gear 8, and a screw portion 16 of the bolt 15 is fitted into the nozzle holder 9 so that the rotor gear 8 and the nozzle holder 9 are separated from each other. Although it is energized, it is installed in a regulated state. On the rotor gear 8 side, the lower limit position of the nozzle 6 is set by inserting the flange portion 17 of the nozzle 6 until it comes into contact with the bottom surface portion of the insertion hole 10.

The mechanism for fixing the nozzle 6 to the nozzle holder 9 will be described below. Reference numeral 19 is a nozzle fixing pin that enters a groove 18 formed over the entire circumference of the peripheral side surface of the nozzle 6. Reference numeral 20 is an insertion hole formed between the nozzle holder 9 and a spring stopper 21 fixed to the side surface of the holder 9, and is inserted until the stopper flange 22 at the tip of the pin 19 contacts one end of the slide bearing 23. To be done.

Reference numeral 24 is a compression spring which is locked by the one end of the spring stopper 21 and the spring flange 22 so that the pin 19 is penetrated. 25 is a knob with a knurl. Reference numeral 26 is a stopper pin that forms a predetermined space between the adhesive discharged onto the tip of the discharge portion 6A of the nozzle 6 and the substrate 1.

Reference numeral 27 denotes a nozzle up / down arm which holds the rotor gear 8 and moves up and down the coating nozzle 6, and a linear guide 30 attached to a fixed base 29 by an up / down mechanism (not shown) which moves up and down by driving an up / down motor (not shown).
Is guided and moved up and down. That is, since the arm 27 is fixed to the rotor gear 8 via the bearing 31, the vertical movement of the arm 27 also vertically moves the nozzle 6. Further, the nozzle 6 is rotated by engaging a gear (not shown) rotated by a rotation mechanism (not shown) with the gear portion 32 above the rotor gear 8. In FIG. 6, the adhesive supply passage inside the nozzle is omitted for convenience.

The nozzle holder 9 also serves as a heater block, and a heater is fitted in the nozzle 6 although not shown in the figure. Heat is transferred to the nozzle 6 through the nozzle holder 9 by heat conduction, and the inside of the nozzle 6 is bonded. The agent is maintained at a suitable temperature. The nozzle holder 9 is attached to the nozzle tip 3 which will be described later.
6, the nozzle tip 36 is inserted through the insertion hole 9A so that the nozzle body 3 described later
Heat is transferred to not only the nozzle 5 but also the nozzle tip 36.

The structure of the coating nozzle 6 will be described below. Reference numeral 35 shown in FIG. 4 is a nozzle body, and a fitting groove 38 into which the fitting portion 37 of the nozzle tip portion 36 is fitted is formed in the lower portion, and the flat surface of the flange portion 39 is the nozzle body 3.
5 is inserted until it abuts the lower part. Thus, in a state where the nozzle tip portion 36 is fitted to the nozzle body 35, the cap nut 40 is formed from the lower portion of the nozzle tip portion 36 through the insertion hole 41 of the cap nut 40 to be formed on the side surface of the lower portion of the nozzle body 35. The nut is fixed via the screw portion 42 formed.

Reference numeral 45 shown in FIG. 5 indicates that the temperature inside the syringe 7 rises due to the air pressure of the compressed air supplied through the air tube 46 connected to the air source 50, and the adhesive inside the syringe 7 hardens. It is a copper pipe for heat radiation for preventing the above, and is interposed between the syringe cap 47 and the air tube 46. Reference numeral 48 is a rubber seal ring that closes the fitting portion between the syringe cap 47 and the syringe 7 so that the air supplied into the syringe 7 does not leak.

Reference numeral 43 shown in FIG. 2 is a supply conveyor for receiving the substrate 1 conveyed from an upstream device (not shown) and supplying the substrate 1 to the XY table 4, and 44 is the table 4
It is a discharge conveyor that discharges the substrate 1 on which the adhesive application work has been completed to the downstream side device. Reference numeral 50 shown in FIG. 1 is an air source for supplying compressed air to the syringe 7 corresponding to each nozzle 6 via an air tube 46. Compressed air from the air source 50 is supplied by each regulator 51 corresponding to each nozzle 6. Each is adjusted to the desired supply pressure. The compressed air adjusted to a desired supply pressure by each regulator 51 is supplied to each syringe 7 by opening each electromagnetic opening / closing valve 52.

Reference numeral 54 denotes the regulator 51 of each nozzle 6.
And a supply pressure detection sensor provided between the electromagnetic on-off valve 52 (in FIG. 1, pressure sensor A is shown for convenience).
Thus, the supply pressure of compressed air during that time is detected. Reference numeral 55 denotes a pressure sensor inside the syringe for detecting the pressure inside the syringe 7 corresponding to each nozzle 6 (pressure sensor B for convenience in FIG. 6).
Is illustrated. ), The electromagnetic open / close valve 52 is opened and compressed air starts to be supplied into the syringe 7, and then a timer (not shown) is timed and a predetermined time elapses (that is, immediately before one coating operation is completed and the atmosphere is opened). The pressure of the compressed air in the syringe 7 is detected. The timing immediately before opening to the atmosphere is set, for example, at the end of each supply time of compressed air set by the application time (air supply time) in the application condition data shown in FIG. 8 stored in the storage device described later. The previous time (see dT in FIG. 6) may be stored in the storage device. Incidentally, various measurement timings may be set corresponding to each supply time.

Reference numeral 56 denotes an A / D converter for A / D converting the voltage signals detected by the detection sensors 54 and 55.
The / D converted signal is sent to the control device 57. The control device 57 controls the supply pressure value (see A in FIG. 6) and the pressure value inside the syringe (see B in FIG. 6) detected by both sensors 54 and 55.
And a reference value (see C in FIG. 6) stored in a storage device (not shown) (for example, regulated by the regulator 51 and supplied). And a judgment device for judging whether or not to stop the coating operation by the coating device based on the comparison result. The drive of the coating device is controlled based on the determination result. It should be noted that various keys may be set to −several% of the supply pressure as the reference value.

Reference numeral 59 is a display device which, when the device is stopped by the control device 57, displays a message to that effect on a monitor screen (not shown) (for example, it indicates that the compressed air supply is defective) to notify the operator. In addition, you may notify by buzzer etc. The operation will be described below. When the production operation is started, X is transmitted from the upstream side device via the supply conveyor 43.
The substrate 1 is placed on the Y table 4 in a positioned state.

The coating operation is performed based on the NC data regarding the coating operation shown in FIG. 7 stored in the storage device. For example, in the coating step 0001, X coordinate data (mm)
And the coordinate position (X
1, Y1) is applied with an adhesive Z (angle data) Z1 under the application conditions shown by the application condition data shown in FIG. That is, D (coating condition data number) of NC data in FIG. 7 is 0.
No. 1 is set, and the nozzle number 1 is set based on the nozzle number 1, the gauge 1, and the coating time T1 which are set to the corresponding 001 of the coating condition data of FIG. 8 (in this embodiment, the nozzle on the left side of FIG. From the gauge 1 (in this embodiment, the supply pressure adjusted by the regulator 51 to the syringe 7 corresponding to each nozzle 6 is 2 gauges 1 and 2). The pressure is selected from the types and data is set in the storage device).
Compressed air is sent from the air source 50 via the nozzle 6
The nozzle 6 is lowered by driving the vertical motor while a predetermined amount of the adhesive is being discharged from the discharging section 6A, and the adhesive is applied onto the substrate 1.

At this time, the work of detecting the supply state of the compressed air is performed. That is, as shown in FIG. 6, the supply pressure (A) adjusted by the regulator 51 is detected by the supply pressure detection sensor 54 when the compressed air is supplied during the discharging operation. Further, the pressure (B) in the syringe 7 after a predetermined time has elapsed (T (T1 in this step) -dT) after the electromagnetic opening / closing valve 52 was opened and the compressed air was started to be supplied into the syringe 7.
Is detected by the syringe pressure detection sensor 55.

The supply pressure value data and the syringe internal pressure value data detected by the sensors 54 and 55 are sent to the control device 57 through the A / D converter 56. The discriminant value (A-B), which is the difference between the supply pressure value and the syringe internal pressure value, is first calculated from these data by the calculation device in the control device 57. Next, the discriminant value and the reference value (A-C) stored in the storage device (where C is -several percent of the supply pressure set by the gauge 1 designated in the step).
And are compared by a comparison device, and the comparison result is the discriminant value <
When the determination device determines that the reference value (that is, (A−B) <(A−C)) (normal), the control device 57 proceeds to the coating operation of the next coating step.

Further, when it is judged by the judging device that the comparison result is discriminant value> reference value (abnormal) (for example, as shown by the alternate long and short dash line in FIG. 6, the syringe internal pressure is (D) ( In the case of A−D)> (A−C)), the control device 57 stops the coating work by the coating device and causes the display device 59 to display the fact to notify the operator.
The operator may be notified by a buzzer or the like. As a result, it is possible to prevent the adhesive from being supplied with a proper amount of compressed air and having a small discharge amount to be applied to the substrate to form a finished product, and the operator can prevent the air tube 46 from moving up and down the nozzle 6 and the like to cause the syringe 7 (heat radiation). It is possible to judge that the air supply was not performed properly because it was disengaged from the copper pipe 45), was broken in the middle, or was bent, and maintenance is facilitated.

Here, a case where the judgment device judges that the condition is normal will be described. Hereinafter, the coating step 0
As in the case of 001, in the coating step 0002, the coating time is Z (angle data) Z2 at the coordinate position (X2, Y2) on the substrate 1 shown by the NC data in FIG. Pressurize the syringe 7 for T2,
The adhesive discharged from the discharging unit 6A is applied onto the substrate 1 by lowering the nozzle 6. At this time, the work of judging whether the supply state of the compressed air is correct or not is performed as described above, and when it is judged to be normal, the coating work of the coating step 0003 is similarly continued. The same applies hereinafter.

[0025]

As described above, according to the first aspect of the present invention, the applicator is provided with the self-diagnosis function for judging whether or not the predetermined air supply to the syringe is surely performed, and when it is judged to be abnormal, Since the apparatus is stopped, the generation of defective substrates can be suppressed as much as possible. Further, according to the invention of claim 2, the coating device is provided with a self-diagnosis function of judging whether or not a predetermined air supply to the syringe is reliably performed,
Since the device is stopped when it is judged to be abnormal, the occurrence of defective boards can be suppressed as much as possible and the operator is informed of that fact via the display device, which helps the operator in returning work. The rate is improved.

[Brief description of drawings]

FIG. 1 is a configuration circuit diagram of a compressed air supply mechanism.

FIG. 2 is a front view of a coating device.

FIG. 3 is a partial cross-sectional view showing a coating nozzle fixing mechanism of a coating unit.

FIG. 4 is an exploded view of a coating nozzle.

FIG. 5 is a partial cross-sectional view showing a syringe.

FIG. 6 is a diagram showing a relationship between discharge time and discharge pressure.

FIG. 7 is a diagram showing NC data.

FIG. 8 is a diagram showing coating condition data.

[Explanation of symbols]

 6 Coating Nozzle 7 Syringe 46 Air Tube 50 Air Source 51 Regulator 52 Electromagnetic Open / Close Valve 54 Supply Pressure Detection Sensor 55 Syringe Pressure Detection Sensor 57 Control Device 59 Display Device

Claims (2)

[Claims] 1. Compressed air supplied from an air source is regulated to a desired supply pressure by a regulator and supplied into a syringe to discharge the coating agent to the tip of a coating nozzle at the bottom of the syringe to print the coating agent on a printed circuit board. In the coating device for coating,
A supply pressure detection device provided between the regulator and the syringe, which is adjusted by the regulator from the air source and detects the supply pressure of the compressed air supplied into the syringe, and a supply pressure detection device provided between the supply pressure detection device and the syringe. An electromagnetic on-off valve, an in-syringe pressure detection device that detects the pressure in the syringe after a predetermined time has elapsed since the electromagnetic on-off valve was opened and compressed air was supplied, and the supply detected by the supply pressure detection device. A calculation device for calculating the difference between the pressure value and the pressure value in the syringe within a predetermined time detected by the pressure detection device in the syringe is compared with the calculation value by the calculation device and the reference value stored in the storage device. A coating device comprising: a comparison device; and a control device that stops a coating operation based on a comparison result by the comparison device. 2. Compressed air supplied from an air source is adjusted to a desired supply pressure by a regulator and supplied into a syringe so that the coating agent is discharged to the tip of a coating nozzle at the bottom of the syringe to print the coating agent on a printed circuit board. In the coating device for coating,
A supply pressure detection device provided between the regulator and the syringe, which is adjusted by the regulator from the air source and detects the supply pressure of the compressed air supplied into the syringe, and a supply pressure detection device provided between the supply pressure detection device and the syringe. An electromagnetic on-off valve, an in-syringe pressure detection device that detects the pressure in the syringe after a predetermined time has elapsed since the electromagnetic on-off valve was opened and compressed air was supplied, and the supply detected by the supply pressure detection device. A calculation device for calculating the difference between the pressure value and the pressure value in the syringe within a predetermined time detected by the pressure detection device in the syringe is compared with the calculation value by the calculation device and the reference value stored in the storage device. A comparison device and a control device for stopping the coating work based on the comparison result by the comparison device and for displaying the fact on the display device are provided. Coating apparatus.