JPH10107411A - Coating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely provide a required application amount for coating substance by extracting the data for specified substrate kind out of a library where application condition data is housed, and collectively confirming application conditions at the start of production. SOLUTION: A CPU automatically extracts an application condition data, based on an NC data which is housed in a library. Then, application data names are assigned for each cylinder 7, for deciding the order of application. While setting is made with application data name of first order is being decided, a bonding agent is delivered by air pressure to be applied on a recognition plate at a specified position. Then, the application point is moved into the field of vision of a camera 8 by movement of an XY-table 4, for recognition of the application amount. If an application diameter for the recognized bonding agent is not within the allowable range of application condition data, a correction time is calculated, and the bonding agent is applied with the correction time, and application diameter is recognized again with the camera 8. Thus, recognition operations are performed continuously for all the application condition data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus for discharging a coating agent stored in a syringe through a discharge nozzle by air pressure and applying the coating agent to a printed circuit board in accordance with coating condition data for determining a discharge amount of the coating agent.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No.
The one described in Japanese Patent No. 6746 is known. According to this conventional technique, in order to obtain an application amount to be applied for each application position, an adhesive, which is an application agent, is discharged in accordance with application condition data to perform application on a printed circuit board.

One of the data constituting the application condition data is
As the application time (ejection time), data is input in advance, and a predetermined application amount is obtained at this time. However, a change in the remaining amount of the application agent in the syringe or other environmental conditions Changes the discharge amount even during the same discharge time. For this reason, it is possible to detect that the remaining amount has reached a predetermined amount, apply the adhesive under the application conditions on a trial basis, recognize the adhesive with a recognition camera, correct the application condition data, and apply the adhesive for production. Is being done.

[0004]

However, in the above-mentioned prior art, the application conditions are not checked at once at the beginning of production.

Accordingly, an object of the present invention is to ensure that a desired amount of a coating agent can be obtained from the beginning of production.

[0006]

According to the present invention, there is provided a coating method in which a coating agent stored in a syringe is discharged through a discharge nozzle by air pressure and applied to a printed circuit board in accordance with coating condition data for determining a discharge amount of the coating agent. An extracting unit for extracting application condition data to be used for a substrate type designated for production from a library in which a plurality of the application condition data are stored; a recognizing unit for recognizing an application amount of the applied application agent; Control means is provided for controlling the application of the coating material in accordance with the application condition data extracted by the extraction means and the recognition means to recognize the application amount of the coating material before the operation.

Further, according to the present invention, in the coating apparatus according to the first aspect, when the recognized application amount is not within an allowable range, the control means corrects the application condition data and recognizes the application amount again. Is controlled so as to perform the coating operation.

According to the present invention, in the coating apparatus according to the first or second aspect, the coating condition data is data of a discharge time for applying air pressure to the syringe.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a printed circuit board,
It is mounted on an XY table 4 as a relative moving means that moves in the XY directions by driving the X-axis motor 2 and the Y-axis motor 3. Reference numeral 5 denotes an application unit, which applies an adhesive as an application agent stored in the syringe 7 onto the substrate 1 through an application nozzle 6 attached to the syringe 7.
The coating unit 5 includes four syringes 7 each having a nozzle 6 attached thereto. The nozzle 6 to be used is selected from the nozzles 6, and the nozzle 6 is moved up and down by a nozzle up-down mechanism (not shown). The discharged adhesive is applied.

From the upper end of the syringe 7, an air passage 30, which will be described later, is communicated with a compressed air source. In the middle, an air passage 30 is provided for each of the syringes 7 in order to set the pressure of air to be applied to each of the syringes 7. Regulator 26 to be described later
Further, a discharge valve 27 to be described later, which switches between adding compressed air to the syringe 7 and releasing the compressed air to the atmosphere, is provided. The printed circuit board 1 is moved in XY by the supply conveyor 11.
It is sent onto the table 4 and the substrate 1 on the XY table 4
Is discharged and conveyed to a downstream device by a discharge conveyor 12. As shown in FIG. 3, a fixed chute 13 and a movable chute 14 for transferring the substrate 1 from the supply conveyor 11 are provided on the XY table 4, and the substrate 1 is positioned and fixed on the chute 13 and 14, and bonded. The agent is applied. A recognition plate 16 is attached to the movable chute 14, and the adhesive is discarded and applied for recognition. The throw-away application is to apply the adhesive on the recognition plate 16 before the application of the adhesive on the substrate 1 using the nozzle 6 that has not been used for a long time. When the coating operation is performed on the substrate 1 while the adhesive hangs down from the nozzle 6, the applied amount of the adhesive changes, or when the adhesive hardens, an appropriate applied amount is not obtained. It is done to pass. Further, when the application for recognition is performed on the recognition plate 16, the recognition camera 8 as a detecting means provided in the application unit 5 recognizes the applied adhesive and recognizes the applied diameter. Since the adhesive is applied in a substantially circular shape, the application amount of the adhesive is recognized by recognizing the applied diameter.

Although the fixed chute 13 is fixed, the movable chute 14 moves so as to be able to approach and separate from the fixed chute 14 and when the width direction orthogonal to the transport direction of the substrate 1 changes according to the substrate type. Since the recognition plate 16 is attached to the movable chute 14, the recognition plate 16 moves with the movement of the movable chute 14. In the present embodiment, the recognition plate 16 is provided separately from the substrate 1 so as to perform the throwing-out application and the application for recognition, but the adhesive is applied to a place other than the application for the production of the substrate 1. Application may be performed.

Next, a control block diagram of the coating apparatus will be described with reference to FIG.

Reference numeral 20 denotes a CPU, based on various data stored in the RAM 21, and performs overall control of various operations related to the coating operation of the coating apparatus in accordance with a control program stored in the ROM 22. The bus line 23 to which the CPU 20 is connected is connected to the X-axis motor 2, the Y-axis motor 3, the recognition camera 8, the regulator 26, and the discharge valve 27 via the interface 24. Further, a CRT 28 for displaying various screens is also connected to the interface 24. Further, an air passage 30 which is a passage of compressed air is provided.
From the regulator 26 and the discharge valve 27 to the syringe 7
Communicates within. In FIG. 4, the regulator 26 and the discharge valve 27 are illustrated one by one.
It is provided for each of the syringes 7. A touch panel switch is formed on the screen of the CRT 28, and a predetermined operation can be performed by touching a location displayed as a switch unit.

The NC data is created for each board type, and FIG. 5 corresponds to the board type "AAA". The NC data includes operation data including data such as a substrate size (XY size and thickness size), coating step data, and coating condition data. The coating apparatus applies the amount of adhesive to be applied to the position to be applied in accordance with the data supported by the step for each step of the application step data, and the application data name shown in the step is the application condition data. Is assigned to each application condition, and data indicating the application condition corresponding to the application condition data is selected from the application data name. The application conditions include the nozzle ID of the nozzle 6 (for each type of nozzle, the number is different for each nozzle type depending on the number of ejection holes, the gap between the height of the stopper and the ejection holes, etc.), and the ejection time. (Time for applying air pressure to the syringe 7), discharge pressure indicating air pressure to be applied to the syringe, application amount data indicating a target application amount to be applied, and the like are stored. Discharge time data is stored without changing the value initially set,
A discharge correction time (shown as “correction time” in FIG. 5) used to change the actual discharge time during the production operation is further provided for each application data name in a pair with the discharge time. Although not shown in FIG. 5, data such as a gauge (a number indicating the regulator 26 provided for each syringe 7 and a position where the nozzle 6 is attached is known) is also stored.

The application condition data name is composed of alphabets, numerals and other symbols, and is specified not only in one NC data but also commonly used in other NC data. This data name is 1
It is not a serial number in one NC data. The application condition data is stored in the RAM 21 as a library, and this library stores not only the application condition data used for one substrate type but also those used for various substrate types collectively. . The coating condition data used for one substrate type is used as part of the NC data as RA
It may be stored in the M21, or may be read out from the library stored in common for each step of the application step data and used. Further, the library may be collectively stored in a predetermined storage medium such as a personal computer other than the coating apparatus.

Prior to the description of the production operation, the setting of the ejection time data in the application condition data will be briefly described.

The discharge time is automatically set on a CRT 2 (not shown).
The setting can be automatically performed by giving an instruction to start setting on eight screens. An adhesive is applied to the recognition plate 16 based on the data initially set as the ejection time, and the recognition by the recognition camera 8 The application diameter is recognized. If this value does not fall within the allowable value of the value set in the application amount data, apply the adhesive again with the time corrected for the ejection time, perform the recognition process again, until the value falls within the allowable value. This operation is repeated. If the value falls within the allowable range, the data of the ejection time at that time is determined as the data of the initial value, and is set as the ejection time of the library.

The initial value may be set and stored by an operator by measuring the amount of adhesive applied.

Next, the production operation will be described.

First, when the type of the substrate 1 to be coated is set from an operation unit such as a touch panel, an NC as shown in FIG.
The data is set and stored in a predetermined area in the RAM 21. The application condition data of the NC data is stored in the RAM 2
1 and read from and stored in the library of the external device. Alternatively, it may be read from the library each time the coating step is performed.

Next, the CRT 28 screen is changed to "production model application amount confirmation / automatic tuning" as shown in FIG. 6, and the operation key 32 (see FIG. 4) is pressed. On this screen, the target NC data is displayed.

In response to the pressing of the operation key 32, the operation for confirming the application amount of the production model is started according to the flowchart of FIG.

That is, first, the CPU 20 automatically extracts the application condition data used in the NC data set based on the NC data. If the data as shown in FIG. 5 is set including the application condition data in a predetermined area in the RAM 21 at the same time as the setting of the NC data, the application condition data may be used. In the case where is stored in the library and is read from the library for each application step, the application data name used from the application step is extracted.

Next, the application data names extracted for each of the syringes 7, that is, for each of the nozzle IDs, are sorted to determine the order of the application execution.

It is conceivable that the order is determined, for example, such that the set application amount is applied in a smaller order.

Next, the adhesive is ejected for the ejection time set in the application condition data of the application data name in the determined first order and applied to the recognition plate 16.

Next, the application point is moved within the field of view of the camera 8 by the movement of the XY table 4, and the application amount is recognized. If the recognized application diameter of the adhesive is not within the allowable range set for each application data name of the application condition data, a correction time to be added to the ejection time is calculated,
This is stored as the ejection correction time. (This correction time becomes a negative value when the discharge amount is too large.) Next, compressed air is supplied into the syringe 7 for the time obtained by adding the correction time data to the discharge time data. The adhesive is applied, and the camera 8 recognizes the diameter of the applied adhesive.

As a result, if the coating diameter is within the allowable range,
The data of the ejection correction time is stored without being changed. If the value is out of the allowable range, the ejection correction time is similarly changed again, and the coating operation and the recognition operation are performed.

After the ejection correction time is determined for the first application condition, the application operation and the confirmation operation are similarly performed for the next application condition, and the ejection operation within the allowable range is performed. The correction time data is stored.

If the application condition data is stored in a predetermined area of the RAM 21 as a part of the NC data, the ejection correction time data is stored in the ejection correction time storage area therein. Is read from the library for each coating step without being stored as a part of the NC data, it is stored in the ejection correction time storage area of the library.

When the checking operation for one syringe 7 is completed in this way, the checking operation of the ejection correction time is performed for the next syringe 7 in the same manner, and all the application condition data extracted based on the NC data are obtained. Are continuously performed.

Next, when a start command of the production operation is issued, the CPU 20 reads the application step of the application step data of the NC data, and reads out the data of each application condition corresponding to the application condition data from the application data name of the step. .

Next, XY is added to the position indicated by the specified position data.
The table 4 is moved, the nozzle 6 with the designated nozzle ID is lowered, the regulator 26 is set to the value indicated by the data, the discharge valve 27 is opened for the data time, and the adhesive is discharged for the specified discharge time. In this way, the adhesive is applied to the specified position on the substrate 1. That is, in step M001, for the nozzle 6 having the nozzle ID "1110", the correction time 1 ms is added to the ejection time 5 msec at the pressure P1.
During a period of ms, the valve 27 is switched to the compressed air side at a predetermined timing, and compressed air is added into the syringe 7.

In this manner, the application of the adhesive is performed for each step of the application step data.

When one substrate 1 is completed in this way, the number of substrates is counted, and the substrate 1 is discharged and conveyed by the discharge conveyor 12.

A chip-shaped electronic component is mounted on the discharged substrate 1 where the adhesive is applied by the next automatic electronic component mounting apparatus, and the component is temporarily fixed to the substrate by the adhesive.

As described above, when the operating condition of the number of substrates set for a certain syringe 7 is reached, the number of times is counted and the CPU 20 determines that the application condition is satisfied.
, And the application amount checking operation is performed for the syringe 7.

That is, the CPU 20 reads the application conditions for the syringe 7 that have become the operating conditions from the application condition data, and applies the adhesive to the recognition plate 16 in accordance with the ejection time, correction time, and ejection pressure data. I will do it. At this time, the throw-away application may be performed prior to the application for recognition.

The recognition of the coating diameter is performed by the recognition camera 8 as to whether the adhesive is applied to the recognition plate 16 and the coating amount indicated by the coating condition data is applied in the same manner as described above, and it is determined whether the coating is within the allowable range. Is done. The application of the adhesive and the recognition of the application diameter are performed by the correction of the correction time in the same manner as described above until the allowable range is reached.

In this embodiment, the data of the initial value of the ejection time is fixed, and the data of the correction time is separately added to the data of the ejection time so that the ejection time and the correction time are added. The time was set to the time when the discharge valve 27 was opened to actually supply the compressed air to the syringe.
The ejection time data in the application condition data in the NC data is sequentially replaced with new data calculated by recognizing the application amount, so that the ejection time data set as the initial value is not updated to another area in the RAM 21. It may be stored.

[0042]

As described above, according to the present invention, a desired amount of a coating agent can be obtained from the beginning of production.

[Brief description of the drawings]

FIG. 1 is a diagram showing a flowchart of a production model application amount confirmation operation.

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

FIG. 3 is a plan view showing an XY table.

FIG. 4 is a control block diagram of a coating apparatus.

FIG. 5 is a diagram showing NC data.

FIG. 6 is a CRT screen diagram for activating a production model application amount confirmation operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 6 Application nozzle (discharge nozzle) 7 Syringe 8 Recognition camera (recognition means) 20 CPU (extraction means) (control means)

Claims (3)

[Claims] 1. A coating apparatus for discharging a coating agent stored in a syringe through a discharge nozzle by air pressure and applying the coating agent to a printed circuit board in accordance with coating condition data for determining a discharge amount of the coating agent, wherein a plurality of the coating condition data are stored. Extracting means for extracting application condition data to be used with a substrate type designated for production from the library, a recognizing means for recognizing the amount of applied coating material, and a coating means extracted by the extracting means prior to the production operation. A coating apparatus comprising: a control unit that controls application of an application agent according to condition data and recognition of the application amount of the application agent by the recognition unit. 2. The method according to claim 1, wherein the control unit corrects the application condition data when the recognized application amount is not within an allowable range, and controls the application operation to recognize the application amount again. The coating device according to claim 1, wherein 3. The coating apparatus according to claim 1, wherein the coating condition data is data on a discharge time for applying air pressure to the syringe.