JPH04199777A - Coating apparatus - Google Patents

Abstract

PURPOSE:To shorten an entire coating time by flexibly selecting a trial coating or not. CONSTITUTION:An idle coating means a coating operation to be conducted irrespective of a main coating so as to clean a nozzle 16, and a trial coating means a coating operation to be conducted irrespective of a main coating operation so as to recognize a coating amount. A controller performs the idle coating and then the trial coating based on a program if a program stored in a first memory is selected by a selector. The controller performs the idle coating based on a program and then performs a main coating if a program stored in a second memory is selected by the selector. Thus, whether the trial coating is conducted or not can be flexibly selected to shorten the entire coating time.

Description

DETAILED DESCRIPTION OF THE INVENTION B) Field of Industrial Application The present invention relates to a coating device that applies a coating agent onto a printed circuit board using a coating nozzle and performs a dump coating operation.

(b) Conventional technology As a conventional technology of this type, there is a technology disclosed in Japanese Patent Publication No. 1-45998. This occurs when the operation is started after the coating operation has been stopped for a long time due to the application being applied to blank areas such as non-wiring areas of the board.For example, the adhesive at the tip of the coating nozzle becomes hard. The problem was that the amount of coating could become unstable due to over-contamination. In other words, in this technique, if the discard coating is performed a set number of times (for example, three times), the coating operation is started on the assumption that the above-mentioned problem has been solved. However, in reality, there are cases in which the problem has not yet been resolved, and the above-mentioned phenomenon may occur even though pick-up coating has been performed.

Therefore, we measured the amount of application under certain setting conditions, and
A technique for adjusting the coating amount based on the measurement results is disclosed in Japanese Patent Application Laid-open No. 1-135561.

However, in this case, as a matter of course, the main coating operation is interrupted and trial coating is performed to adjust the amount of coating, which increases the total coating operation time. Further, under certain setting conditions, trial coating may be performed even though there is no need to recognize the coating amount, resulting in wasted time within the total coating work time.

(c) Problems to be Solved by the Invention Accordingly, it is an object of the present invention to shorten the total coating operation time by making it possible to flexibly select whether or not to perform a test application operation.

(d) Means for Solving the Problems Therefore, the present invention provides a coating device that applies a coating agent onto a printed circuit board with a coating nozzle and also performs a dump coating operation, in which a trial coating is performed after the dumping. a first storage device that stores a program to perform the main coating after the discarding, a second storage device that stores a program that causes the main coating to be performed after the discarding, and a selection device that selects each program completely stored in each of the storage devices; A control device is provided for controlling a predetermined coating operation based on the program selected by the selection device.

(E) Effect Based on the above configuration, if the selection device selects the program stored in the first storage device, the control device performs a trial hit after performing a discarded hit based on the program.

Further, if the program stored in the second storage device is selected by the selection device, the control device performs the final coating after performing the discarding based on the program.

(F) Example Hereinafter, an example of the present invention will be described in detail based on the drawings.

(1) is a printed circuit board on which adhesive is applied as a coating agent for mounting chip components (not shown), and an XY table that moves in the XY direction using an X-axis drive motor (2) and an (4) The printed circuit board (1> is each board part (IA)).

(IB), (IC), and can be divided into each board part. At this time, each board part (IA), (IB), (IC
), adhesive is applied in the same pattern between the connection lands so as to place and fix chip components (not shown).

(6) is an adhesive coating unit 1 for applying adhesive to the printed circuit board (1), which applies adhesive to the printed circuit board (1). In this embodiment, there are four. The [111 coating unit (6) has a roller receiver (7) and a roller (8).
) is supported by a cam lever (9). (11
> is a cam whose arc diameter changes depending on the rotation angle, and holds the cam lever (9) via a cam follower (12) installed on the cam lever (9).

(13) is a nozzle vertical drive unit such as a motor that rotates the cam (11), and when the cam (11) is rotated by the drive unit (13), it is installed at the other end of the roller (8) of the cam lever (9>). The cam lever (9) is rotated using the fulcrum shaft (14)
) swings up and down. The adhesive application unit (6) moves up and down by the up and down swing of the cam lever (9).

(16) is a nozzle that discharges adhesive and applies the adhesive onto the printed circuit board (1), and the adhesive application unit (6)
) Nozzles (16) with different coating amounts are prepared. (17) is a syringe that is connected above the nozzle (16) and stores the adhesive. (18) is a syringe for supplying compressed air to discharge the adhesive from the nozzle (16). It is a tube.The nozzle (16)
is rotated by a rotation mechanism (not shown).

(19) represents each of the substrate parts (IA), (IB), (IC)
This is a defective mark detection sensor that detects a defective mark (M) attached to.

(20) is a dumping table placed on the Y table (3).

(21> is the operation unit that generates various data by operating each key, keyboard 22 for setting various data), cursor instruction key (23), numeric keypad (24), screen selection key (26) of monitor TV (25) , and a start key (27) for starting the coating operation.

(28) is a RAM serving as a storage device for storing NC data regarding the coating operation.

(29) is a ROM serving as a storage device that stores programs related to coating operations.

(30) is a CPU serving as a control device that performs overall control of the coating device.

(31) is an interface.

-6~ (32) is a timer provided corresponding to each nozzle (16) to measure the non-use time of each nozzle (16);
34) is a usage timer provided corresponding to each nozzle (16) and measuring the usage time of the nozzle (16).

(33> is an in-board discard step counter that specifies the discard position in the board.
This refers to the coating operation that is performed for the purpose of cleaning (6), regardless of the main coating.

(38) is provided corresponding to each nozzle (16>), and is subtracted by 1 each time the amount of adhesive recognized by the recognition device (not shown) applied by each nozzle (<16) falls within the set application range. This is the pass count counter. Note that trial application is a coating operation that is performed independently of the main coating operation in order to recognize the amount of coating.

(39) is a failure number counter provided corresponding to each nozzle (16), which is decremented by 1 each time the amount of adhesive applied by each nozzle (16) is out of the set range.

Reference numeral (40) is an in-board trial punching step counter that specifies a trial punching position in the board.

(42) is an off-board coating step counter that specifies the coating position outside the board, that is, on the scraping table (20) J:.

(44) is a coating number counter provided corresponding to each nozzle (16) and counting the number of coatings by each nozzle (16>); ) is a non-use count counter that counts the number of times of non-use (counts the number of times of application using a nozzle (16) other than the own nozzle (16)).
The number of times of application and the number of times of non-use may be the total number of times and total time, which is limited to only main application, including lot management application, waste application, and trial application.

The setting operation of various data will be explained below.

Next, the screen selection key (26) of the monitor TV (25)
Press to display the mounting data (MOUN) as shown in Figure 3.
T DATA). And the keyboard (22
) to move the cursor (not shown) to the printed circuit board (1) of step (M-No.) 1.
) to the position of the X data roooooo, and press the numeric keypad (24) to set a predetermined value. Next, move the cursor to the Y data indicating the Y coordinate position.
Move to the position ooooo and set the predetermined value in the same way. Next, move the cursor to the 2 data “0” indicating the coating angle direction.
0000, and set a predetermined value.

Note that the unit of this value is [degrees]. Next, the cursor is moved to the coordinate position indicated by the above-mentioned X data and Y data to the position of R data '0OOJ indicating the type of component to be mounted by the automatic electronic component mounting apparatus, and a predetermined value is set.

Next, the screen selection key (26) is pressed to display part data (PARTS DATA) as shown in FIG. This data is set with various data for the R data. First, for the R data "001", the nozzle data (NOZZLE) can be set to "1", and the regulator data (REGULA) among the multiple regulators (not shown) that adjust the vacuum pressure. "1" for T O' R)
is set, and the coating amount processing time data (TIME) is '0'.
50B (mSEC) is set and the coating amount data (S I
'080 J (Q, 8mm) is set for '080 J (Q, 8mm), and the coating amount tolerance data (TOLERANSE 5
'010J (±0.1111n'l) is set for IZE).

Note that the data regarding the coating amount is the diameter of the adhesive that has been completely coated.

Next, press the screen selection key (26>) to select the waste & recognition data (WASTED DISPENS) as shown in Figure 5.
E & DISPENSE RECOGNITION
DATA). Various data settings are performed for this data in the same manner as the mounting data (MOUNT DATA).

In addition, step (M-No) 1 to step (M-NO) 1
Up to 0 (this discard & recognition data (WASTE DI)
SPENSE &DISPENSERE'C0GNI
TION DATA) before a certain step of in-board discard data (W)) are steps for lot management specific to the user. From step (M-No) 12 to step (M-N=10-0) 22 (this pick-up & recognition data (WASTE)
DISPENSE & DISPENSERECOG
Recognition data (R) inside the board in NITION DATA)
(before a certain step) is an intra-board discarding step that indicates the discarding position within the board. Step (M-No) 2
4 to step (M-No) 34 (this waste dispensing & recognition data (WASTE DISPENSE & DIS
PENSE RECOGNITION DATA) before the step with end data (E)) is an in-board test shot step that indicates a test shot position on the board, and the amount of adhesive applied at this position is determined by the recognition device. Recognized.

Next, press the screen selection key (26>) to display the waste data (WASTE DISPENSE) as shown in Figure 6.
DATA). This data is stored for each nozzle (
16) is the data regarding the discount. mode(
MODE) can be set to "rO" if the nozzle (16) does not perform discarding, and "1" if discarding is performed when the unused number counter (45) counts the set number of unused applications. " is set, and the discard timer (32
) is to be discarded after counting the set non-use time, "2" is set, and the above-mentioned non-use count counter (4
5) Or if you want to make a discount based on each condition using the discount timer <32), use r3. is set.

The number of unused coatings (D I 5PENSE) is set as the limit number of unused times for that nozzle, which is a guideline for performing discarding. The non-use time (timer) is set with a limit time for the non-use time of the nozzle (16), which serves as a guideline for performing discarding. Note that the unit of this time is (SEC) (seconds). WASTE
) is set the number of times the nozzle (16) performs random firing. This is the number of times that cleaning of the nozzle (16) will be completed if the number of times is rounded down.

Next, press the screen selection key (26) to display the recognition data (DISPENSE RECOGN) as shown in FIG.
ITION DATA). This data is related to the recognition of the amount of coating applied to each nozzle (16). The mode (MODE) is set to "rO" if application amount recognition is not to be performed, and "1" is set if application amount recognition is to be performed after a predetermined number of applications has elapsed by the application number counter (44) of the nozzle (16). . has been set, and if the coating amount is to be recognized after the predetermined coating time has elapsed using the usage timer (34) for that nozzle, "2" is set, and the application number counter (44) or usage timer (3) described above is set.
If you want to recognize the coating amount based on each of the conditions in 4),
3J is set. Number of applications (DISPENSE)
The nozzle (
16) A limit number of times of application is set. time(
TIME) is the coating time (16) used for coating using the nozzle (16), which serves as a guide for recognizing the coating amount.
(Based on cumulative usage time for each nozzle (16))
The time limit has been set. Pass (OK) is set as the number of consecutive passes of the coating amount, which is a guideline for terminating the coating amount recognition operation. For re-recognition (RETRY), a limit number of times of re-recognition is set when the recognition result of the coating amount is rejected. In addition, the nozzle of N0ZZLE4 (
16), because the amount of application is not recognized, the number of applications (
DISPENSE), time (TIME), pass (OK)
and re-recognition (RETRY) are set to zero. In this case, even if a value other than zero is set, that value will not be read.

The operation will be explained below based on the flowcharts of FIGS. 9 and 10.

First, the operator presses the start key (27) to start the coating device.

A printed circuit board (1) placed on an XY child table 4) is positioned by a positioning device (not shown) by a transport device (not shown).

At the start of operation, the discard data (WA) shown in FIG.
STE DISPENSE DATA)≠65(TI
Since the non-use time (maximum number of nozzles of N02zLE3 (16) (7) 180 CS'E C) (seconds) shown in ME) has not been timed up and the set number of applications has not been counted up, first , WASTED DISPENSE & D not shown in Figure 5.
ISPENSE RECOGNITION DATA
), if a step is provided before the step with the board-discarded data (W), as described above,
This is a step declaration for lot management unique to the user, and the coating operation for lot management is performed based on this declaration. That is, for example, when changing the type of adhesive or changing the operator, a mark can be placed on the printed circuit board (1) to indicate that the adhesive has been changed for subsequent printed circuit boards, or the operator has changed the operator. This is to make it possible to check whether the changes have been made.

Therefore, the adhesive is applied to the application area set in the margin of the printed circuit board 1), and judgment is made based on the applied shape, position, etc. Also, if you want to check the month of production, you can set up a four-digit square and display it in binary numbers. For example, if it is November, it will be "1011".

Next, the defective mark detection sensor <19) detects a defective mark (M) on each board portion (IA), (IB), (IC) of the printed circuit board (1). Then, the coating operation is performed on the substrate portions to which no defect mark (M) is attached. Here, as shown in Fig. 1, the substrate part (
Since the defective mark (M) is attached to the IC), the coating operation is performed on the substrate section (IA) and then on the substrate section (IB).

In addition, a printed circuit board (1
> Recognize the position of any mark on the
The comparison device in the CPU (30) compares the position corresponding to the mark stored in the AM (28), the comparison result is calculated by the calculation device in the CPU (30), and the difference is calculated. The amount is stored in RAM (28). Below, the third
The coating operation is performed sequentially from step (M-NO) 1 based on the coating data (MOUNTDATA) shown in the figure.

At this time, the amount of scratching is taken into consideration in the X, Y, and Z data of each step, and the coating onto the printed circuit board (1) is performed.

Hereinafter, a case will be described in which the discharging operation of each nozzle (16) is performed.

The main coating operation is performed based on each step, and the nozzle (16) to be used this time is, for example, a N0ZZLEI nozzle (
16), the discarded data (WAS
TE DISPENSE DATA) mode (M
ODE) is [1, (that is, if the set number of unused applications is reached, discarding is performed.) At this time, the number of unused applications (DISPENSE) set in the data (WASTE DISPENSE DATA) is 100.
When the number of times reaches 1, the content of the counter (45) is cleared and becomes 1 time.) Based on 1 time of waste dispensing time (WASTE) A discard is made once. At this time, the waste dispensing and recognition data (WASTE DISPEN) shown in Fig.
SE & DISPENSE RECOGNITIO
If the on-board discard data (W) is declared in the on-board discard data (W), the printed circuit board set in Step 7 (M-N, 0) 12 indicated by the on-board discard step counter (33) is declared. 1) -17= Adhesive is discarded at the X and Y coordinate positions of the upper margin (ID).

Next, if the nozzle (16) to be used this time is the nozzle of N0ZZLE2 < 16), the mode (MODE) is set to "3".
J (that is, when the set number of unused applications or the set unused time is reached, the discard is performed.), so if either condition is reached (the set number of unused applications is 50, the set unused time is reached). 3Q (SEC) (seconds)), and similarly, before the next main coating operation, waste removal is performed based on the number of waste removal steps (WASTE) in the board, indicated by the step counter (33〉). -NO) The dumping is performed at the dumping position set at 13.

Next, if the nozzle 16) to be used this time is the nozzle (16) of N0ZZLE2, the mode (MODE) is set to r2.
(In other words, when the set non-use time is reached, the data is discarded.

), the non-use time (TIM
E) 180. When (S,, EC) (seconds) is reached, before the next main coating operation, the step (M -No) 14 and step (M-
No. 15 is set as the throw-off position.

Next, if the nozzle (16) to be used this time is the N0ZZLE4 nozzle (16>), the mode (MODE) is "1".
”, so the number of unused applications set at this time is 2.
When it reaches 00 times, the number of discards (WA) is started before the next main coating operation.
Step (M-No) 16 indicates the discarding step counter (33) in the board based on the three times of STE).
A waste shot is made at the waste shot position set in step (M-NO) 1B.

Further, the coating operation is performed sequentially, and the following nozzle 16
) will be described below.

The main application operation is performed based on each step, and the nozzle (16) to be used next time is the nozzle (16) of N0ZZLEI.
, the recognition data (DISPENS
E RECOGNITION DATA) mode (MO
Since the application number counter (DE) is 11" (that is, the application amount is recognized when the set number of applications is reached), the application number counter (44
> is the data (DIspENsE RECOGNITI
The number of applications (DI 5PE) set in
NSE), a trial application is performed before the next 1001st coating operation (however, once the coating reaches 1000 coatings, the contents of the counter (44) are cleared and becomes 1 coating operation). At this point, the WASTE DISPENSE & D
ISPENSE RECOGNITION DAT
If board recognition data (R) is declared in A), the blank space ( Adhesive is sampled at the X and Y coordinate positions of ID). After a trial drive to that position is performed, the XY table (4) is moved by the X-axis drive motor (2) and the Y-axis drive motor (3), and the printed circuit board (1) is moved.
) is moved to the imaging area of the recognition device to recognize the applied amount of the adhesive. A comparison device (not shown) in the CPU (30) compares this recognized application amount with a set application range stored in advance in the RAM (28), and based on the comparison result, a judgment device (not shown) determines the application amount. It is determined whether or not is within the above range. Here, if the judging device determines that the item has passed, the content of the pass count counter (38) is decremented by 1, and if it is judged to be failure, the content of the fail count counter <39> is decremented by 1.

Hereinafter, a case where the above-mentioned judgment result is a pass will be explained.

Since the N0ZZLE1(7)/Zuru(16) has been set to pass (OK) as shown in FIG. 7 three times, a trial shot is performed again. That is, a trial adhesive is applied at the X and Y coordinate positions on the printed circuit board (1) shown in step (M-NO) 25. Next, the recognition device recognizes the applied amount of the trial adhesive. The amount of adhesive applied is compared with the set application range as described above, and it is determined whether the product passes or fails. If it passes, the number of passes counter (3
8) is subtracted by 1, and try the test shot again at step (M
-No.) If the test is performed at the X, Y coordinate position indicated by 26 and passed, the content of the pass count counter (38) becomes 0, and the actual main coating work can be started. Also, if it is judged as a failure on the second or third try, the content of the pass count counter (38) is cleared, and the content of the fail count counter (39>) is decremented by 1, and then the coating amount is increased again. Adjust and try it out.

Also, we will explain the case where it is determined that the test has failed.

As mentioned above, the content of the failure number counter (39) is 1.
At the same time as the amount is subtracted, the amount of application is adjusted again and a trial shot is performed. Then, it is determined whether the coating amount is acceptable or not in the same manner as described above. If it is judged to have passed, the contents of the failure number counter (39) are cleared, the contents of the number of passes counter (38) are decremented by 1, and the counter (
Trial shots are repeated until the content of 38) becomes 0 times. Furthermore, if it is determined that the test result has failed, the content of the failure number counter (39) is decremented by 1, and the trial shot is repeated.

Note that the re-recognition operation after it has been determined that the result has failed is that the content of the failure number counter (39) is the re-recognition (R) shown in FIG.
ETRY], = the set number of times (4 times for NOZZI, El nozzles < 16) can be continued until the number is subtracted and becomes 0 times. Further, if the application amount does not fall within the set range even when the set number of times reaches 0, the apparatus is abnormally stopped and the operator is notified by a notifying device (not shown). At this time, the following explanation will be continued on the assumption that the application amount recognition operation has been completed at step (M-No) 24 to step (M-No) 26 where the trial application was performed.

Next, if the nozzle (16) to be used this time is the nozzle (16) of N0ZZLE2, the mode (MODE) is "2".
J (In other words, the application amount is recognized when the set time is reached.)
Therefore, when the use timer (34) reaches the time (TIME) of 1000 (SEC) (seconds), a trial application is performed before the next main coating operation.In other words, the in-board trial application step counter (40) Step indicated by (M-No)
A test shot was made at the test shot position set at 27,
The application amount is recognized by the recognition device. In this recognition operation, as described above, when the number of passes is set to pass (OK) twice in a row, the main application operation becomes possible. In addition, if you fail the test and need to re-evaluate, please apply for re-recognition (RE).
TRY) can be performed until the two times set in TRY are subtracted and become zero times. At this time, the explanation will be continued on the assumption that the coating amount recognition operation has been completed because the trial shot has been performed in step (M-NO) 27 and step (M-NO) 28.

Next, if the nozzle (16) to be used next time is the NOZZLE3 nozzle (16), the mode (MODE) is set to 13.
(In other words, when the set number of applications or the set time is reached, the amount of application is recognized.) Therefore, if either condition is reached at this time, (the number of applications set is 800, the time is 1200 [5EC]) ( sec)) A trial shot is performed before the next main application operation. That is, the test shot is performed at the test position set at step (M-NO) 2!9 indicated by the in-board test shot step counter (40), and the coating amount is recognized by the recognition device -23=. At this time, since the recognition operation is set to pass (OK) once, if the recognition operation passes this time, the main application operation can be started. In addition, when the test is rejected and re-recognition is performed, the re-recognition (RETRY) can be performed until the number of times set to 2 is subtracted and becomes 0 times. At this time, the explanation will be continued on the assumption that the application amount recognition operation has been completed since the trial shot was performed in step (M-No.) 29.

Next, if the nozzle (16) to be used this time is the nozzle (16) of N0ZZLE4, the mode (MODE) is "0".
” (that is, the amount of application is not recognized.) Therefore, the amount of application is not recognized and the main application operation continues.

Then, the main coating operation continues, and the trial dosing is performed one after another, and if the trial dosing step in the board is completely used during this trial dosing (''''°゛- the next step is ), the first coating position on the disposal table (20) outside the substrate, indicated by the substrate coating step counter (42), is on the XY child table 4). By the XY movement, the nozzle (16) for trial application is moved downward, and trial application is performed at the application position, and the amount of application is recognized.When the trial application is performed at that position, the substrate is Subtract 1 from the content of the adhesive coating position counter 43).Hereafter, if it is necessary to perform a trial application, the next coating position (in this case, the first coating position) that has been used in the substrate coating step is subtracted by 1. A trial shot is performed from the application position.

Similarly, if all the steps on the board are used up during the above-mentioned process (align →→＊≠゛−゛
It is determined that the next step is the in-board recognition data (R). ), off-substrate coating step counter 42), and a predetermined position on the discard table (20).

Another embodiment will be described below with reference to FIG. 11.

(50) is a drive-2 rotated by a drive source (not shown)
6 = A scraping table where scraping or trial firing is performed on the adhesive scraping paper (53) passed between the roller (51) and the driven roller (52). In this case, the nozzle (XY child table 4 below
The discharging position on the discarding table (50) is moved by the movement of the discarding table (50), and the nozzle (1) is moved by driving the nozzle vertical moving part (13).
6〉 is lowered and a casual shot or trial shot is performed. The next random shot or trial shot position is a predetermined pitch away from the adhesive so as not to overlap with the previous temporary shot or trial shot adhesive. When the adhesive has been applied a predetermined number of times (the total number of scraps and trial shots) on the adhesive scrap paper (53), the drive roller (51) is driven by the drive source to coat the adhesive scrap paper (53). is wound up and ready for new application. In addition, each time you perform a trial shot or a trial shot, use adhesive waste paper (53cm).
) may be wound up at a predetermined pitch.

Moreover, although the present invention is an example in which a plurality of nozzles (16) are stacked, it is of course possible to use a single nozzle.

Furthermore, the dumping tables may be provided separately for dumping and trial shooting.

Further, after performing a random shot or a trial shot on the waste shot tables (20) and (50), a random shot or a trial shot may be performed on the margin portion of the printed circuit board board 1).

Further, at the start of operation, a random shot may be performed without fail, or a trial shot may be performed.

(G) Effects of the Invention As described above, according to the present invention, it is possible to flexibly select whether or not to perform a trial application, thereby shortening the total coating work time.

[Brief explanation of the drawing]

1 and 2 are a perspective view and a configuration circuit diagram of the coating device of the present invention, FIG. 3 is a diagram showing NC data regarding the coating operation, FIG. 4 is a diagram showing component data, and FIG. 5 is a diagram showing the inside of the board. Fig. 6 is a diagram showing the discarding and recognition data, Fig. 7 is a diagram showing the recognition data, Fig. 8 is a state diagram of the printed circuit board after the coating operation, Fig. 9 and FIG. 10 is a flowchart regarding the coating operation, and FIG. 11 is a diagram showing another embodiment. (20) , (50)...Sanding stand, (29>・
...ROM, (30)...CPU.

Claims (1)

[Claims] (1) In a coating device that applies a coating agent onto a printed circuit board with a coating nozzle and also performs a dump coating operation,
A first storage device that stores a program that causes a trial shot to be performed after the above-mentioned abandonment, a second storage device that stores a program that causes the final application to be performed after the abandonment; A coating device comprising: a selection device for selecting each program; and a control device for controlling a predetermined coating operation based on the program selected by the selection device.