JP3253427B2 - Coating device - Google Patents

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 applying a coating agent in a syringe to a printed circuit board via a coating nozzle.

[0002]

2. Description of the Related Art As this kind of prior art, there is a technique disclosed in Japanese Patent Application Laid-Open No. Hei 4-196288 filed earlier by the present applicant. This means that the proximity sensor attached to the lower part of the syringe detects that the coating material in the syringe has decreased to that position.

However, there has recently been a demand for arbitrarily detecting the remaining amount of the coating agent.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to make it possible to arbitrarily detect the remaining amount of a coating agent in a syringe.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a coating apparatus for applying a coating agent in a syringe to a printed circuit board via a coating nozzle. A storage device for storing a relationship between a reaching ratio of the supply pressure to the supply pressure and a remaining amount of the coating agent in the syringe, a supply pressure detection device for detecting an air supply pressure supplied from an air source, and the supply of the air. In-syringe pressure detecting device for detecting the pressure in the syringe, and a calculating device for calculating the arrival rate of the in-syringe pressure after a predetermined time detected by the in-syringe pressure detecting device with respect to the supply pressure detected by the supply pressure detecting device And a determination device for determining the current remaining amount of the coating material in the syringe from the arrival ratio calculated by the calculation device based on the relationship between the arrival ratio and the remaining amount stored in the storage device. In which the provided.

[0006]

With the above arrangement, the calculating device calculates the arrival rate of the syringe internal pressure detected by the syringe internal pressure detecting device to the supply pressure after the supply pressure detected by the supply pressure detecting device is applied for a predetermined time. . The determination device determines the current remaining amount of the coating agent in the syringe from the arrival ratio calculated by the calculation device based on the relationship between the arrival ratio and the remaining amount stored in the storage device in advance.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. (1) shown in FIG. 2 is a printed circuit board mounted on an XY table (4) that is moved XY by driving the X-axis motor (2) and the Y-axis motor (3). The XY
The table (4) is provided with a discard plate (not shown) on which an adhesive described later is discarded.

(5) An application unit for applying an adhesive as an application agent stored in the syringe (7) via the nozzle (6) onto the substrate (1). The nozzle (6) and the syringe ( 7), a coating head is formed, and four coating heads are provided. A desired one of the four heads is selectively fixed to the coating unit (5), and the coating unit (5) is lowered onto the substrate (1) by a vertical movement by a nozzle up / down mechanism (not shown), The discharged adhesive is applied to the tip of the nozzle (6).

The head is rotated by a rotating mechanism (not shown) while being held by a holder (not shown). (1
Reference numeral 0) denotes a CCD camera for imaging the diameter of the adhesive applied on the substrate (1). (11) is a supply conveyor for supplying the substrate (1) received from an upstream device (not shown) to the XY table (4), and (12) is a substrate (1) coated with an adhesive on the table (4). ) Is a discharge conveyor that discharges (1) to the downstream device.

(15) shown in FIG.
R as a storage device for storing various data such as C data
In the AM, (16) is a ROM as a storage device for storing various programs related to the coating operation. (17) is a CPU as a control device that controls the coating device in a comprehensive manner.
Reference numeral 18 denotes various operation keys, which include, for example, a start key, an operation key, a stop key, a pause key, a return key, an execution key, and an all-origin return key.

Reference numeral (24) denotes a touch panel switch connected to the interface (26), which is mounted on the screen of the CRT (25) via a mounting tool (not shown). The touch panel switch (24) has a transparent conductive film coated on the entire surface of a glass substrate, and electrodes are printed on four sides. Therefore, a very small current is applied to the surface of the touch panel switch (24), and when the operator touches, the current changes on the four electrodes, and the coordinate value touched by the circuit board connected to the electrodes is calculated. Therefore, if the coordinate value matches a coordinate value in a group of coordinate values stored in the RAM (15) as a switch unit for performing a certain operation, the operation is performed.

(40) An air source (3) as a pressure supply source
9) An air valve as a pressure supply valve for sending air to the syringe (7). The air valve (opening operation) (not shown) connected to the air source (39) according to a command from the CPU (17) and the syringe (7). One of the air opening ports (close operation) (not shown) for releasing the air in the air) is connected to the syringe (7) to supply air to the syringe (7) or supply air to the syringe (7). Is stopped and the air in the syringe (7) is released to the atmosphere. The air valve (4
A plurality of air pressure regulators (41) for supplying air having different air pressures to the syringe (7) are interposed between the air source (0) and the air source (39), and a desired air pressure regulator (41) set for each step is provided. In order to switch to the air pressure, an air pressure switching valve (42) controlled by the CPU (17) is interposed to select the air pressure adjusting regulator (41). In this embodiment, two types of air pressure are supplied to each nozzle (6).

Reference numeral (43) denotes an in-syringe pressure detecting sensor arranged near the syringe (7) for detecting the pressure in the syringe (7), and (44) the air pressure switching for detecting the original pressure. It is a supply pressure detection sensor arranged near the valve (42). Hereinafter, various setting operations will be described. First, when the power is turned on, the CRT (25) displays an initial screen shown in FIG.

On the initial screen, operation switches for respective items of "production operation", "setup work", "data editing", "device maintenance" and "environment setting" are displayed.
Each operation switch section is color-coded by item and is displayed in a double frame, and a touch panel switch (24) is mounted on the upper surface thereof. The operation switch of “production operation” is touched when performing operations such as production operation start, production operation step designation, production model data correction, teaching, etc. The operation switch unit is displayed in green.

The operation switch section of the "setup work" includes model switching, home return operation, manual operation, inching operation, and so on.
Touch when performing operations such as. The operation switch unit is displayed in yellow-green. The operation switch unit of “data editing” is touched when performing operations such as NC data editing, device setting data editing, offset data editing, and the like. The operation switch unit is displayed in blue.

The operation switch section of "apparatus maintenance" is touched when operations such as apparatus operation information, information redisplay, apparatus diagnosis, test confirmation, teaching, etc. are performed. The operation switch unit is displayed in yellow. The operation switch section of “Environment setting” is for setting the tower light, buzzer,
Touch to perform operations such as calendar setting. The operation switch unit is displayed in gray.

Here, the operation switch of "DATA EDIT" shown in FIG. 3 is touched, and the "DATA EDIT" screen shown in FIG. 6 is displayed. On this screen, operation switches for respective items of “NC data”, “device setting data”, “test operation data”, and “offset data” are displayed.
The operation switch section of “NC data” is touched when an operation for setting operation data, application condition data, application data, etc. is performed.

The operation switch section of "device setting data"
Touch to perform setting operations such as device timer setting, pre / post-process mode setting, device address setting, calendar setting, etc. The operation switch section of the "test operation data" selects the head rotation operation and ignores the front and rear process signals ...
Touch to perform setting operations such as.

The operation switch section of "offset data" is touched when an operation for setting such as apparatus offset, nozzle offset, nozzle holder offset... Is performed. On the screen of FIG. 6, the user touches the operation switch section of "NC data" to display the screen of "NC data editing" shown in FIG. This screen displays the “Operation Data”
And operation switches for “setup data”, and display the application condition data, discard data, and the number of used steps of the application data, which will be described later.

When the operation switch of "operation data" is touched, a screen of "operation data" relating to the application diameter recognition operation shown in FIG. 8 is displayed. In this screen, conditions for performing the application diameter recognition operation for each nozzle (6) are set. For example, for the nozzle (6) with the nozzle number 1, the “operating condition” is “actual application count”
(Based on the number of times of application by the nozzle (6)). That is, when an operation switch section (a switch section shaded in FIG. 8) for setting an operation condition for the nozzle (6) is touched, the switch section is turned on, and the data setting display section at the lower left of the screen is displayed. Nozzle 1 Operating conditions: ------ (The operating conditions set up to now are displayed. No data is currently set.) "Is displayed, and an operation switch unit for each item of each condition is displayed at the lower right of the screen. Is displayed. When a desired (actual number of application) operation switch section is touched, “−−−−” of the display section is displayed.
The portion is displayed as "actual application frequency", and the "actual application frequency" is set by touching the "set" key at the lower right, and the lit operation switch section is displayed as "actual application frequency". . The actual number of times of application is set to 1000 times. That is, when the user touches an operation switch for setting the actual number of times of application to the nozzle (6) of the nozzle number 1, the switch is turned on and the display unit displays "Nozzle 1 Actual Number of Applications: ------ The number of times is displayed. Currently, no data is set.) "And the operation switch section of the operating condition for each item which has been displayed so far in the lower right of the screen is replaced with" FIG. 9 ". The operation switch section of "numeric keypad" is displayed. When the desired number of actual application times (1000) is input by operating the “numeric keypad”, the “−−−−” portion of the display section is displayed as “1000”,
By touching the “Setting” key at the lower right, “100
“0” times are set, and the illuminated operation switch unit is displayed as 1000. The setting of the "discard operation" will be described below. Similarly, nozzle No. 1 (6)
Touching the operation switch section for setting the number of discards to the corresponding area causes the switch section to light up, and the display section displays "Nozzle 1 discarding operation: ---- (The current setting is displayed. Data is currently set. Is not displayed.) And the operation switch section of the “numeric keypad” previously displayed at the lower right of the screen is replaced with “do” (not shown),
Each operation switch section of “No” is displayed, and when “Yes” is input, the “−−−” portion of the display section is displayed as “Yes”, and by touching a “Setting” key at the lower right, “ "Yes" is set, and the lighted operation switch unit is displayed as "Yes".

That is, the actual number of times of application of the nozzle (6) is 1
When the counter (not shown) of the RAM (15) counts that the number of times has reached 000, the discard operation is performed on the blank portion or the discard plate of the substrate (1), and then the application diameter recognition operation is performed. Hereinafter, data is similarly set for the other nozzles (6). That is, for the nozzle (6) of the nozzle number 2, the "operating condition" is "actual application time" (based on the usage time measured by a timer (not shown)).
The time is set to be "discard operation" for 120 seconds. That is, the actual application time of the nozzle (6) is 12
When the timer measures 0 seconds, the discard operation is performed, and then the application diameter recognition operation is performed.

For the nozzle (6) with nozzle number 3, the "operating condition" is set to "number of substrates", the number is set to 10, and the "discard operation" is set. That is, the nozzle (6) confirms that a substrate presence / absence sensor (not shown) confirms that the applied substrate (1) has been discharged from the XY table (4) to the discharge conveyor (12) side. When a counter (not shown) counts ten times, the discard operation is performed, and then the application diameter recognition operation is performed. Note that the fact that the coating operation has been performed up to the final step shown in FIG.
If 7) is confirmed and a counter (not shown) in the RAM (15) counts all the steps, a discarding operation may be performed and then an application diameter recognition operation may be performed.

Further, the nozzle (6) of the nozzle number 4 is
The “operating condition” is “all conditions” (the application diameter recognition operation is performed when any of the conditions set in “the actual number of times of application”, “actual application time”, and “number of substrates” is satisfied). The number of coatings is 500, the uncoated time is 60 seconds, the number of substrates is 5,
It is set not to perform "discard operation". That is, if any of these operating conditions is satisfied, the nozzle (6) performs the operation of recognizing the first application diameter discarded in the margin of the substrate (1) without performing the discarding operation. It is.

Further, it is also possible to prevent the application diameter recognition operation from being performed by touching the operation switch section of "not recognize". Next, when the user touches the operation switch unit of “page feed” in FIG. 9, a screen of “operation data” regarding the dispensing application operation shown in FIG. 10 is displayed. In this screen, the conditions for discarding each nozzle (6) are set. For example, the nozzle of nozzle number 1 (6)
Is set as "the number of unapplied times" (based on the number of times of application by another nozzle (6) without using the nozzle (6)). That is, when the user touches an operation switch unit (a switch unit shaded) for setting an operation condition for the nozzle (6), the switch unit is turned on, and “Nozzle 1” is displayed on a data setting display unit at the lower left of the screen.
Operating conditions: ------ (The operating conditions set up to now are displayed. No data is currently set.) "Is displayed, and the operation switch section for each item of each condition is displayed at the lower right of the screen. Is done. Touching a desired (unapplied number) operation switch section among these displays “−” on the display section.
--- '' part is displayed as `` unapplied times '', and the `` unapplied times '' is set by touching the `` set '' key at the lower right, and the lit switch section is called `` unapplied times '' Is displayed. The number of unapplied times is set to 100 times. That is, when the user touches the operation switch section for setting the number of unapplied times for the nozzle (6) of the nozzle number 1, the switch section is turned on and the display section displays "Nozzle 1 unapplied number: ----" The number of times is displayed. No data is currently set.) "Is displayed, and a" numeric keypad "(not shown) is used in place of the operation switch section of the operating condition for each item previously displayed at the lower right of the screen. Is displayed. When the desired number of unapplied times (100) is input by operating this "numeric keypad", the "----" portion of the display section is displayed as "100", and the "SET" key at the lower right is touched. By "1
00 is set and the lit switch section is set to “1”.
00 ”is displayed. Further, the number of discards is set to three times. Similarly, when the operator touches an operation switch for setting the number of discards for the nozzle (6) of nozzle number 1, the switch is turned on and the display is displayed. "Nozzle 1
Number of discards: −−−− (The number of times set so far is displayed. No data is currently set.) ”Is displayed. When the desired number of discards (3) is input by operating the “numeric keypad”, the “−−−−” portion of the display section is displayed as “3”, and the lower right “setting” key is touched. As a result, "3" times are set, and the lit switch section is displayed as "3".

That is, the number of times of uncoating of the nozzle (6) is 1
When the counter (not shown) of the RAM (15) counts that the number of times is 00, the discard operation is performed three times before the subsequent actual application operation. Hereinafter, data is similarly set for the other nozzles (6). That is, for the nozzle (6) of the nozzle number 2, the “operating condition” is “unapplied time” (based on the unused time measured by a timer (not shown)), and the time is “discarded” for 60 seconds. The number of hits is set to two. That is, when the timer measures that the non-application time of the nozzle (6) has reached 60 seconds, the discard operation is performed twice as described above.

For the nozzle (6) with nozzle number 3, the "operating condition" is "number of substrates", the number is "5", and the "number of discards"
Is set to four times. That is, the nozzle (6) informs the RAM (1) that the applied substrate (1) has been discharged from the XY table (4) to the discharge conveyor (12) five times.
When the counter (not shown) in 5) counts, the discard operation is performed four times. Further, the nozzle (6) of nozzle number 4 satisfies one of the conditions set in the “operating condition” as “all conditions” (“number of unapplied times”, “unapplied time”, and “number of substrates”). The number of unapplied times is 50 times, the unapplied time is 30 seconds, and the number of substrates is 2
The number of discards is set to one. That is, if any of these operating conditions are met,
The discard operation is performed once.

It is also possible to prevent the discard operation by touching the operation switch of "do not discard". Next, by touching the operation switch section of "Return to screen" at the lower left of the screen in FIG. 10, the screen is returned to the screen of "Edit NC data" (see FIG. 7). On this screen, when the operation switch section of “application condition data” is touched, a screen of “application condition data” shown in FIG. 14 is displayed. FIG.
Touching the operation switch section of "display switching" of FIG.
Data subsequent to the application condition data shown in FIG. 5 is displayed on the screen. When these screens are displayed, touching the operation switch of "DATA EDIT" at the lower right of the screen causes the screen shown in FIG.
A screen for setting the “application condition data” shown in FIG. 6 is displayed. On this screen, first, the application condition data number 0
01, “Nozzle number designation”, “Gage number designation”, “Application time”, “Application diameter”, “Angle correction”,
"Application diameter recognition function selection", "Control command",
There is an operation switch unit for data input of "comment".
For example, when the operation switch section of “designate nozzle number” is touched, the switch section is lit and the display section for data setting displayed at the lower left of the screen displays “designate nozzle number: −−−”.
-(The current setting number is displayed. No data is currently set.) "Is displayed, and" Nozzle 1 "," Nozzle 2 "," Nozzle 3 ", and" Nozzle 4 "are displayed at the lower right of the screen. Are displayed. Here, when a desired operation switch section (“nozzle 1”) is touched, the “−−−−” portion of the display section is displayed as “nozzle 1”,
By touching the “SET” key at the lower right, “Nozzle 1” is set, and the lit switch section is displayed as “Nozzle 1” (see FIG. 16).

When the operation switch of "gauge number designation" is touched, the switch is turned on, and "gauge number designation: ----" is displayed on the display at the lower left of the screen. Is not set.) "Is displayed and" Gauge 1 "is displayed on the lower right of the screen.
The operation switches of “gauge 2”, “gauge 3”, and “gauge 4” are displayed. Here, when a desired operation switch section (“gauge 1”) is touched, “−−−” of the display section is displayed.
“−−” is displayed as “Gauge 1”, and “Setting” in the lower right
By touching the key, "gauge 1" is set, and the lit switch section is displayed as gauge 1. Thus, the application pressure of the nozzle (6) of the nozzle number 1 becomes the pressure set on the application pressure setting screen set as shown in FIG. That is, the application pressure is 1.00 k
gf / cm ² .

Next, when the user touches the operation switch for "coating time", the switch is turned on and the display section at the lower left of the screen displays "coating time:----ms (the current setting number is displayed. Is not set.) Is displayed, and the respective operation switches of the "numeric keypad" are displayed at the lower right of the screen as shown in FIG. Then, when the desired application time (T1) is input by operating the "numeric keypad", the "----" portion of the display section is displayed as "T1", and the "SET" key at the lower right is touched. The switch unit that has been set and turned on is “T1” (in FIG. 17 and the like, “999” is displayed as a convenient number).
Is displayed.

Here, the "application time" is a time during which the air valve (40) is opened and compressed air is supplied to the syringe (7), and means a discharge time. The following “Apply diameter” operation switch section has the “Gauge number designation”
(Application pressure) and the data input at the time of setting the “application time”, the RAM (1) is calculated by the calculation device in the CPU (17).
Calculation formula stored in 5)

[0031]

(Equation 1)

(A, B, C, and D are obtained from experimental values.
Each value may be “0”, where X is the coating diameter and t is the coating time. ) Calculated from the application diameter data (D1m
m) is automatically displayed. That is, when two of the three data of the gauge pressure (application pressure), the application time, and the application diameter are set, the other one is automatically calculated, and FIG.
As shown in 7, “gauge number designation”, “application time”,
This is displayed in parentheses () on the right of each operation switch section of “application diameter”. This serves as reference data when inputting data. As described above, the operator can use the “numeric keypad” to refer to this data and set desired data (the same value or an approximate value as the reference data). it can. Hereinafter, other data is set in the same manner. Further, the above-described calculation result may be directly set as data.

The same applies to items relating to the application diameter recognition. That is, when the operation switch section of “function selection” is touched, the switch section is turned on and the data setting display section displayed at the lower left of the screen displays “application diameter recognition function selection: −−−− ( Is displayed. No data is currently set.) "And the operation switches of" recognize "and" not recognize "are displayed at the lower right of the screen. When a desired operation switch ("recognize") is touched, the "----" portion of the display section is displayed as "recognize", and by touching a "setting" key at the lower right, ""Recognize" is set, and the lit switch section is displayed as "Recognize".

Subsequently, the operation switch of "Return to screen" is touched on the screen of FIG. 17 to return to the screen of "application condition data" shown in FIG. Then, after touching the “arrow” operation switch section below the upper and lower “arrow” operation switch sections to specify the data setting position regarding the application condition data number 002, the “data edit” operation switch section is set. Touch to set the data for the application condition data number 002 as described above. Hereinafter, all the application condition data (here, 200 used steps) are set in the same manner.

Next, the operator touches the operation switch of "Return screen" at the lower left of the screen to return to the "Edit NC data" screen shown in FIG. Next, by touching the operation switch of "Return to screen" on the screen of "Edit NC data", the screen is returned to the "Edit data" screen shown in FIG. On this screen, when the operation switch section of “apparatus setting data” is touched, a screen of “apparatus setting data” shown in FIG. 11 is displayed. On this screen, each operation switch section of "apparatus timer setting", "appropriate process mode setting", "apparatus address setting", "application nozzle setting", "application pressure setting", and "nozzle acceleration / deceleration setting" is displayed. Is done.

On this screen, when the user touches the operation switch section of "application pressure setting", a screen of "application pressure setting" shown in FIG. 12 is displayed. This screen is for setting the pressure to be applied to the syringe (7), and the respective operation switches of “gauge 1”, “gauge 2”, “gauge 3”, and “gauge 4” are displayed, as described above. When a desired operation switch section is touched, a data setting screen is displayed on the display section and a "numeric keypad" is displayed, and the operator can adjust the air pressure adjusting regulator to the desired application pressure by adjusting the "numeric keypad". Is set. still,
A regulator that can be automatically adjusted in conjunction with the application pressure set using the screen may be used.

The operation for determining the relationship between the remaining amount and the arrival rate as a criterion for detecting the remaining amount during automatic operation will be described below. Here, the operator puts a known amount of liquid, for example, water (or an adhesive) into a syringe (7) having a closed end of the nozzle (6), and after a short period of time from the start of air supply at that time. Attainment rate of the air pressure in the syringe (7) (this pressure is detected by the pressure sensor in the syringe (43)) with respect to the air supply pressure (this pressure is detected by the supply pressure detection sensor (44)). Is recorded for each supply pressure. Similarly, the measurement is repeated with various changes in the amount of liquid, and each is recorded. The recorded data is analyzed to determine the relationship between the air supply pressure, the remaining amount of the adhesive in the syringe (7), and the arrival rate for each supply pressure. In this process, if data for calibration due to a change in the atmospheric pressure is recorded, it may be analyzed and substituted into the relationship.

Then, these relationships are set and the ROM
(16). Further, the same operation is performed on the syringe (7) of another coating head provided with the nozzle (6) having a different shape (diameter or the like). Hereinafter, the operation will be described. First, when the power is turned on, the CRT (25) displays an initial screen shown in FIG.

Touching the green operation switch for "production operation" on this initial screen displays the "production operation (application)" screen shown in FIG. Then, when the start key (19) is pressed in this screen, the "running" screen shown in FIG. 4 is replaced with the "running" screen shown in FIG. 5, and the production operation by the coating apparatus is started. The substrate (1) is conveyed onto the chute from an upstream device (not shown), and the substrate (1)
Is performed.

At this time, at the start of operation, the number of unapplied times set in the counter of each nozzle (6) and the unapplied time set in the discard timer, which are the conditions for normally discarding the "operation data" in FIG. Or the number of substrates detected by the counter has not reached the set value,
Coating work is started as it is. In addition, you may make it carry out unconditionally at the start of driving | operation.

The coating operation is performed based on the NC data related to the coating operation shown in FIG. That is, step 000
In No. 1, the adhesive is applied at the coordinate position (X1, Y1) on the substrate (1) indicated by the X coordinate data [mm] or the Y coordinate data [mm] at the angle Z1 indicated by the angle data Z by the application condition data illustrated in FIG. Apply under the indicated application conditions. Note that “X” in FIG.
“1”, “Y1”, and “Z1” are all displayed as “1.00” as expedient numbers. Hereinafter, the same applies. D (application condition data number) of the NC data in FIG.
The nozzle (6) having the nozzle number 1 based on the nozzle number 1, the gauge 1, the coating time T1, and the coating diameter D1 set to 001 corresponding to the coating condition data in FIG.
Air is supplied from a supply source to the syringe (7) through an air tube (not shown) for the application time T1 by the pressure of the gauge 1 with the pressure of the gauge 1 to discharge a predetermined amount of the adhesive from the nozzle (6), and the substrate (1) is discharged. The adhesive is applied with an application diameter D1 on the top, and selection data (“Yes” or “No”) as to whether or not to recognize the application diameter is set in the application condition data. In this case, since “Yes” is set, a test coating operation is performed before the main coating operation in step 0001, and a coating diameter recognition operation is performed. Accordingly, the X and Y coordinate positions of the margins on the board (1) set in the next step 0011 which have been declared in the board (R) in the discarded data shown in FIG. 18
In FIG. 1, 11.00 and 11.00 are displayed as expedient numbers, and steps 0011 to 0014 are steps for indicating the position of the margin on the substrate (1) where test hitting can be performed. ) Is applied with an adhesive. When the test hitting is performed up to step 0014, the next test hitting is performed on the discard plate. C above the applied adhesive
The XY table (4) is moved by driving the X-axis motor (2) and the Y-axis motor (3) so that the CD camera (10) is positioned. Then, the applied adhesive is imaged by a CCD camera (10). Based on this imaging result, a calculation device (not shown) in the CPU (17) calculates the diameter of the adhesive. This diameter is stored in advance in the RAM (15), for example, within an allowable range (fixed value) of ± 20% (0.
8D1 ≦ Calculated diameter ≦ 1.2D1) C
It is determined by the PU (17). If it is determined that the value is not within the allowable range, the CPU (1
In step 7), the adhesive is applied at the time of the main application operation in step 0001 in consideration of the deviation from the allowable range. In other words, the target application diameter D1 was supposed to become the target application diameter when pressurized at the application time T1, but if the actual diameter is DN by recognition, the CPU (17) substitutes DN for X in the above-mentioned calculation formula. TN which is the value of t obtained by the substitution is calculated, and T1 + (T1
−TN), the opening time of the discharge valve is controlled during the main coating operation in step 0001, and the coordinate position (X1, Y) on the substrate (1) indicated by the NC data in FIG.
In 1), the angle correction data (----) shown in FIG.
(Zero)) and apply the adhesive. If it is determined that the value falls within the allowable range, the main application operation in step 0001 is started.

At the time of the first application operation (trial hit), the operation of detecting the remaining amount of the adhesive in the syringe (7) is performed. Hereinafter, the remaining amount detection operation will be described. A certain air pressure (this pressure is detected by a supply pressure detection sensor (44)) supplied to the syringe (7) corresponding to the nozzle (6) of the nozzle number 1 via a desired air pressure regulator (41). The pressure in the syringe (7) is detected by the pressure sensor (43) in the syringe (7) after a lapse of a minute time from the discharge start point when the adhesive is discharged to the tip of the nozzle (6) by the air of (2). Then, the arrival rate of the pressure in the syringe with respect to the supply pressure is calculated, and the RAM (1
Store in 5). The CPU (17) previously stores the ROM (1
The current remaining amount is determined from the arrival rate calculated by the calculation device based on the relationship between the arrival rate and the remaining amount of the syringe (7) at the supply pressure at this time stored in 6).

Next, in step 0002, since the application diameter recognition selection data is set to "NO", the actual application operation is performed without performing the application diameter recognition. That is,
The coordinate position (X) on the substrate (1) indicated by the NC data in FIG.
2, Y2) at the angle obtained by adding the value set in the angle correction data shown in FIG.
The syringe (7) is pressurized by 2 to apply the discharged adhesive. At this time, the remaining amount detection operation is performed as described above. Further, the remaining amount may be detected at predetermined intervals (for example, the number of times of application, the application work time, the number of substrates, etc.).

Thereafter, the coating operation after step 0003 is continued in the same manner. Here, this step 0003
Since the nozzle (6) of nozzle number 2 is used for the first time as shown in FIGS. 13 and 14, the remaining amount of the syringe (7) corresponding to the nozzle (6) is detected during the discharging operation as described above. . In addition, when discarding is performed at the time of starting, the remaining amount is detected during this discarding operation.

Hereinafter, the discard operation will be described. When the nozzle (6) to be used this time is, for example, the nozzle (6) of the nozzle number 2, when the “uncoated time” reaches the set uncoated time of 60 seconds as shown in FIG. 2 which is the number set in “number of discards” before operation
Perform rounding. At this time, the XY table (4) is moved by driving the X-axis motor (2) and the Y-axis motor (3), and a blank portion on the substrate (1) is positioned below the nozzle (6). With the adhesive in the syringe (7) being discharged from the nozzle (6) by the air supplied through the air tube, the nozzle (6) is lowered, and the substrate in the discard data shown in FIG. The X and Y coordinate positions of the blank area on the substrate (1) set in the next step 0006 which has been declared (W0005) in FIG. 18 (for convenience, 6.00, 6.00 is displayed, and Steps 0006 to 0009 are the steps for indicating the position of the blank area on the substrate (1) where discarding is possible.). A first discard is performed above the applied adhesive at the position set in step 0006 indicated by the CCD camera step counter. At this time, for example, if the “number of discards” is set to two, the second discard is performed in step 0007. Nozzles (6) of other nozzle numbers are similarly discarded based on each condition. When the discarding is performed up to step 0009, subsequent discarding is performed on the discard plate.

Next, the application operation is sequentially performed, and the operation of recognizing the application diameter of the nozzle (6) will be described below. When the main application operation is performed based on each step, and the nozzle (6) to be used next is, for example, the nozzle (6) of the nozzle number 1, the actual number of times of application is set as shown in FIG. When the number of application times reaches 1,000, the application diameter is recognized as described above. At this time, since "Yes" is set in "Dispatch operation" at the upper left of the screen, the dispensing operation is discarded three times before the main coating operation by the "number of discards" set on the screen of FIG. If the in-board recognition data (R) is declared after the discarding operation, the board (1) set in step 0012 indicated by the in-board test hitting step counter (not shown) as described above. X in the margin of
An adhesive is trial-hit at the Y coordinate position. The application diameter of the test-struck adhesive is imaged by a CCD camera (10). The XY table (4) is moved so that the CCD camera (10) is positioned above the margin of the substrate (1) on which the adhesive has been tested.

Then, the test-struck adhesive is applied to CC
An image is taken by a D camera (10). As described above, the calculation device (not shown) in the CPU (17) calculates the diameter of the adhesive based on the imaging result. The CPU determines whether or not this diameter is within the allowable range stored in the RAM (15).
It is determined by (17). If it is determined that the value falls within the allowable range, the operation returns to the main application operation. On the other hand, if it is determined that the adhesive does not fall within the allowable range, the CPU (17) applies the adhesive during the main application operation in consideration of the amount of deviation from the allowable range. Also,
When the nozzle (6) to be used this time is, for example, the nozzle (6) having the nozzle number 4, the application diameter recognition operation condition is “all conditions” as shown in FIG. The application diameter recognition operation is performed when one of the “time” and the “number of substrates” satisfies the condition. At this time, since the “disposal operation” is set to “not performed”, a test strike is performed on a blank portion or a discarded plate at the substrate position without performing the discard operation before the main coating operation. The application diameter of the adhesive thus applied is recognized, and based on the recognition result, the main application operation is continued as described above. In addition, it was determined that the coating diameter was not within the allowable range as a result of the coating diameter recognition, and the coating diameter was automatically corrected during the main coating operation, but it was not limited to this, and it was confirmed that the coating diameter was within the allowable range. The operation may be shifted to the main application operation later. That is, the trial hitting may be repeated.
Hereinafter, the application diameter of the nozzle (6) of another nozzle number is similarly recognized based on each condition, and automatic correction is performed based on the result.

Hereinafter, when it is detected that the application operation is continued and the current remaining amount is reduced to the predetermined amount, the CPU (1)
7), for example, notifies the worker of the remaining battery level via a not-shown notifying device, or stops the device. In addition, a notice of running out of the remaining amount may be given, and the operator starts preparing for the work of supplementing the adhesive. Further, for an apparatus having a function of bringing an adhesive from a refrigerator by an automatic transporter, it is possible to smoothly cope with the apparatus.
Also, without stopping the device, four nozzles (6)
When the nozzle (6) having the same shape is mounted, another nozzle (6) may be substituted until the adhesive is supplied.

Further, the number of coating times, the number of substrates, the coating time, and the like within a predetermined range of each remaining amount are grasped.
These may be displayed on the screen, or if they exceed a preset allowable range, the apparatus may be stopped or an abnormality may be notified. Thus, for example, if the number of applications in this range is larger than the allowable range, clogging may occur in the nozzle (6), and it may be that the desired application diameter has not been applied. If the value is less than the allowable range, the adhesive may be used excessively and may be used as a material for determining whether or not a pressure setting error or the like has occurred.

Further, for example, the remaining amount of each syringe (7) is displayed or shown in the "during operation" screen shown in FIG. In this case, the display may be displayed in red or the like to notify the worker. Also, since the supply pressure actually supplied to the syringe (7) is detected by the supply pressure detection sensor (44), the supply pressure to the atmospheric pressure is considered in consideration of the error of the detected supply pressure with respect to the set pressure. The set value of the residual pressure in the syringe (7) at the time of opening to the atmosphere (detected by the syringe pressure detection sensor (43)) can also be changed. Furthermore, as in the technique disclosed in Japanese Patent Application Laid-Open No. 4-196288, after the position of the float is detected by the proximity sensor and the remaining amount of the adhesive is exhausted, or after the application operation is performed a set number of times after the remaining amount is notified, the operation is performed. In the case of replacing with another nozzle, even if the sensor installed at the lower end of the syringe detects that the remaining amount is running out, the float cannot actually enter. Even if the agent remains and the application operation is performed a set number of times after the remaining amount is notified, the value is set in consideration of the difference in the nozzle diameter, the application diameter, etc. Sometimes remained. On the other hand, if the present invention which does not use a detecting means such as a proximity sensor is applied, the adhesive can be used up.

[0051]

As described above, according to the present invention, a syringe
Syringe after predetermined time detected by internal pressure detector
For the supply pressure detected by the supply pressure detector of the internal pressure,
Is calculated by the calculation device and stored in the storage device.
Arrival rate calculated based on the relationship between the remaining arrival rate and the remaining amount
The remaining amount of the coating agent in the syringe
Since the detection by the conventional proximity sensor or the like becomes unnecessary, the time when the remaining amount of the coating agent in the syringe reaches the predetermined remaining amount
Not only can be detected arbitrarily but also
Minimize detection time regardless of whether
And supply pressure is detected by the supply pressure detector.
The remaining amount accurately even if the supply pressure changes.
Can be detected.

[Brief description of the drawings]

FIG. 1 is a configuration circuit diagram of a coating apparatus.

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

FIG. 3 is a screen displayed via a touch panel switch.

FIG. 4 is a screen displayed via a touch panel switch.

FIG. 5 is a screen displayed via a touch panel switch.

FIG. 6 is a screen displayed via a touch panel switch.

FIG. 7 is a screen displayed via a touch panel switch.

FIG. 8 is a screen displayed via a touch panel switch.

FIG. 9 is a screen displayed via a touch panel switch.

FIG. 10 is a screen displayed via a touch panel switch.

FIG. 11 is a screen displayed via a touch panel switch.

FIG. 12 is a screen displayed via a touch panel switch.

FIG. 13 is a screen displayed via a touch panel switch.

FIG. 14 is a screen displayed via a touch panel switch.

FIG. 15 is a screen displayed via a touch panel switch.

FIG. 16 is a screen displayed via a touch panel switch.

FIG. 17 is a screen displayed via a touch panel switch.

FIG. 18 is a screen displayed via a touch panel switch.

[Explanation of symbols]

 (1) Printed circuit board (4) XY table (5) Coating unit (6) Nozzle (7) Syringe (16) ROM (17) CPU (24) Touch panel switch (25) CRT (40) Air valve (43) Pressure in syringe Detection sensor (44) Supply pressure detection sensor

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuhiro Nagao 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-64-59823 (JP, A) JP-A-Hei 1-58369 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B05C 5/00-5/02 B05C 11/10 B05D 1/26 H05K 3/34 504

Claims (1)

(57) [Claims] In a coating apparatus for applying a coating agent in a syringe to a printed circuit board via a coating nozzle, a predetermined ratio after a certain supply pressure is applied and an arrival rate of the pressure in the syringe with respect to the supply pressure and the syringe. A storage device that stores a relationship with the remaining amount of the coating agent in the inside, a supply pressure detection device that detects an air supply pressure supplied from an air source, and a syringe that detects a pressure in the syringe to which the air is supplied. A pressure detecting device, a calculating device for calculating an arrival rate of the syringe internal pressure after a predetermined time detected by the syringe pressure detecting device with respect to a supply pressure detected by the supply pressure detecting device, and stored in the storage device. A judging device for judging the current remaining amount of the coating agent in the syringe from the arrival rate calculated by the calculating device based on the relationship between the current arrival rate and the remaining amount. Place.