JPH07551U - Coating device - Google Patents

Abstract

(57) [Summary] [Objective] The present invention aims to enable the atmospheric release operation based on the optimum atmospheric release time in that state. [Structure] The CPU (35) opens the air valve (40) for a specified time to supply the air supplied from the air source (41) into the syringe (7), and the compressed air in the syringe (7) is supplied. After the adhesive is discharged to the discharge part of the nozzle (6) by means of the pressure sensor, the pressure and the pressure in the syringe (7) are successively decreased which are detected by the pressure sensor (43) when the air valve (40) is opened to the atmosphere. When the difference between the atmospheric pressure detected by the sensor (44) and the atmospheric pressure is within a predetermined range, it is determined that the atmosphere opening operation has ended.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, the air supplied from an air source is supplied to the inside of a syringe by opening the opening / closing valve to discharge the coating material in the syringe to the discharge part of the nozzle, and then the opening / closing valve is closed. Stop the air supply, open the air in the syringe to the atmosphere, and apply the discharged coating material to the printed circuit board to finish one coating operation, or open / close the air supplied from the air source. Is opened to supply it into the syringe, and the coating material in the syringe is discharged to the discharge part of the nozzle and applied to the printed circuit board, and then the on-off valve is closed to stop the air supply and The present invention relates to a coating device that releases air to the atmosphere to end one coating operation.

[0002]

[Prior art]

 As a conventional technique of this type, as disclosed in JP-A-62-176571, air pressure from an air source is applied to the inside of the syringe to apply the coating agent inside the syringe to the printed circuit board. In addition, when the air valve was opened to the atmosphere after the supply operation from the air source was completed and the pressure in the cylinder was reduced to atmospheric pressure, the atmosphere release operation was completed based on the preset atmospheric release time data. Had decided.

However, since the atmospheric opening time is measured at the factory at the atmospheric pressure before shipping, the coating agent in the syringe is almost empty, and therefore, there is a difference from the atmospheric pressure at the shipping destination. Or when the coating material is not close to empty, for example, when the atmospheric pressure is low and the opening time to the atmosphere is insufficient, residual pressure is generated, which may cause normal coating operation. If the atmospheric pressure is high or there is a large amount of coating agent remaining, and if the atmospheric opening time is too long, it may be judged that the atmospheric opening operation has not ended despite the atmospheric pressure. Was occurring.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to enable the atmospheric opening operation based on the optimum atmospheric opening time in that state.

[0005]

[Means for Solving the Problems]

 Therefore, according to the present invention, the air supplied from the air source is operated to open the on-off valve to supply the air into the syringe to discharge the coating material in the syringe to the discharge portion of the nozzle, and then to close the on-off valve. The air supply is stopped, the air in the syringe is opened to the atmosphere, and the discharged coating material is applied to the printed circuit board to complete one coating operation, and the air supplied from the air source is opened / closed. Is opened to supply it into the syringe, and the coating agent in the syringe is discharged to the discharge part of the nozzle to apply it to the printed circuit board, and then the opening / closing valve is closed to stop the air supply and the inside of the syringe. In the coating apparatus that releases the air to the atmosphere to complete the first coating operation, a first pressure sensor that detects the pressure in the syringe that decreases gradually when the atmosphere is opened, and a second pressure sensor that detects the atmospheric pressure. Pressure sensor and both Difference in pressure sensed by the capacitors is is provided with a control device for determining the atmospheric opening operation when it becomes within a predetermined range has been completed.

In addition, according to the present invention, the air supplied from an air source is supplied to the inside of the syringe by opening the opening / closing valve to discharge the coating material in the syringe to the discharge portion of the nozzle and then close the opening / closing valve. Operate to stop the air supply, open the air in the syringe to the atmosphere, apply the discharged coating material to the printed circuit board to complete one coating operation, and open / close the air supplied from the air source. The valve is opened to supply it into the syringe, and the coating material in the syringe is discharged to the discharge part of the nozzle to apply it to the printed circuit board, and then the opening / closing valve is closed to stop the air supply and the inside of the syringe. The first pressure sensor that detects the pressure in the syringe that gradually decreases when opening to the atmosphere after the predetermined condition is reached, Detect atmospheric pressure The second pressure sensor, the first control device that determines that the atmospheric opening operation is completed when the difference between the pressures detected by the two sensors falls within the predetermined range, and the atmospheric opening operation is started. A storage device that stores the time until the pressure difference becomes within the allowable range, and the atmosphere release operation is completed based on the time stored in the storage device until the coating operation is continued and the next predetermined condition is reached. And a second control device for judging that

[0007]

[Action]

 With the above configuration, the control device opens the on-off valve for the specified time to supply the air supplied from the air source into the syringe, and causes the compressed air in the syringe to discharge the coating agent to the discharge portion of the nozzle. Then, when the on-off valve is opened to the atmosphere, the difference between the pressure in the syringe, which is detected by the first pressure sensor and is gradually decreased, and the atmospheric pressure, which is detected by the second pressure sensor, is predetermined. When it is within the range, it is judged that the atmospheric opening operation is completed.

Further, the first control device, when a certain predetermined condition is reached, detects the pressure in the syringe which is gradually decreased by the first pressure sensor when the atmosphere is opened and the second pressure sensor. When the difference between the atmospheric pressure and the atmospheric pressure is within the predetermined range, it is determined that the atmospheric opening operation is completed, and the storage device starts the atmospheric opening operation until the pressure difference falls within the allowable range. Remember the time. Then, the second control device determines that the atmosphere opening operation is completed based on the atmosphere opening time stored in the storage device until the coating operation is continued and the next predetermined condition is reached.

[0009]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral (1) shown in FIG. 2 is a printed circuit board mounted on an XY table (4) which is moved in XY by driving the X-axis motor (2) and the Y-axis motor (3). (5) is an application unit for applying an adhesive agent as an application agent stored in the syringe (7) on the substrate (1) through the nozzle (6), and is provided with four nozzles (6) There is. One desired nozzle (6) of the four nozzles (6) is selectively fixed to the coating unit (5), and the coating unit (5) is vertically moved by a nozzle raising / lowering mechanism (not shown) so that the substrate ( 1) It is lowered and the discharged adhesive is applied to the tip of the nozzle (6).

(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 an adhesive applied on the table (4). And a discharge conveyor for discharging the substrate (1) to a downstream device. Reference numeral (30) in FIG. 1 includes a keyboard (31) as an input device for setting various data, a screen selection key (33) of a monitor TV (32), a start key (34) for starting the coating device, and the like. In the operation section, various data are generated by operating each key of the keyboard (31).

Reference numeral (35) is a CPU as a control device, which performs given control relating to various data settings and control relating to coating operation based on various information in response to each key operation. (36) is a RAM as a storage device for storing various data set by the keyboard (31). Reference numeral (37) is a ROM that stores a program related to the coating operation.

Reference numeral (40) is an air valve as a pressure supply valve for sending air from an air source (41) as a pressure supply source to the syringe (7), which is connected to the air source (41) by a command from the CPU (35). Either the unillustrated air intake port (opening operation) or the unillustrated air opening port (closing operation) for opening the air in the syringe (7) to the atmosphere is connected to the syringe (7), and the syringe (7 ) Or the air supply to the syringe (7) is stopped and the air in the syringe (7) is opened to the atmosphere. In addition, between the air valve (40) and the air source (41), a CPU (switching to a desired air source set for each step among a plurality of air sources (not shown) having different air pressures) There is a valve (not shown) controlled by 35).

Reference numeral (42) is an interface. Reference numeral (43) is a pressure sensor for detecting the pressure inside the syringe (7), and reference numeral (44) is a pressure sensor for detecting the atmospheric pressure at the device installation location. Reference numeral (50) is a usage timer which is provided corresponding to each nozzle (6) and measures the usage time of each nozzle (6).

Reference numeral (51) is a usage counter which is provided corresponding to each nozzle (6) and counts the number of times of use (application number) of each nozzle (6). The operation of setting the atmospheric opening time setting timing data will be described below with reference to FIG. First, the screen selection key (33) of the monitor television (32) is pressed to display the atmospheric opening time setting timing data shown in FIG. 4 on the screen. This data shows that after air pressure is applied to the syringe (7) to start the discharge of the adhesive to the discharge part of the nozzle (6), the air inside the syringe (7) is opened to the atmosphere and the discharge of the adhesive is completed. The condition for performing the setting operation required for the operation is set for each nozzle (6).

In the mode, “1” is set when the setting operation is performed when the use time counted by the use timer (50) of the nozzle (6) reaches a predetermined time, and the nozzle (6 If the setting operation is performed when the number of times of use counted by the use counter (6) of 6) reaches a predetermined number, “2” is set, and the use timer (50) or the use counter (51) described above is used. If the setting operation is performed based on each condition, "3" is set. Therefore, since the mode of the first nozzle (6) is set to "1", after the usage time of the nozzle (6) reaches the set usage time "1500" seconds, the nozzle (6) ) Is used to set the atmospheric release time. Since the mode of the second nozzle (6) is set to "3", the usage time of the nozzle (6) is set to "1000" seconds, or the number of times of use is set. After the number of times of use reaches "600", the operation of setting the atmospheric opening time is performed when the nozzle (6) is used next time. Since the mode of the third nozzle (6) is set to "2", after the number of times of use of the nozzle (6) reaches the set number of times of use "800", the nozzle (6) is next time. Performs the operation to set the atmospheric release time when using. The same applies to the fourth nozzle (6). Note that, for example, in the data regarding the first nozzle (6), the number of times of use is set to "1000", but the mode is "1" (the usage time of the nozzle (6) is Then, the setting operation of the atmospheric release time is performed at the next coating.), So the data (“10000” times) is ignored. The same applies hereinafter.

The operation will be described below. At this time, since the current atmospheric pressure and the remaining amount of adhesive in the syringe (7) are unknown at the start of the coating operation, the atmospheric opening time corresponding to the atmospheric pressure and the remaining amount of adhesive at this time is set. There is a need. First, when the start key (34) of the operation unit (30) is pressed, the coating position (X1) on the substrate (1) shown in the first step is controlled according to the coating data shown in FIG. , Y1) The discharge of the first nozzle (6) (corresponding to the leftmost nozzle in FIG. 2; the second nozzle (16) is second from the left) selected above based on the nozzle selection data content 1 Move the XY table (4) XY so that the exit is located. At the same time, the air valve (40) is opened while the nozzle (6) is being lowered via the nozzle up-and-down mechanism, and air is sent from the air source (41) to the syringe (7) for the pressurization time T1 and is then discharged from the nozzle (6). After starting the discharge of a predetermined amount of adhesive, the air valve (40) is closed to stop the supply of air from the air source (41) and the air in the syringe (7) is discharged through the atmosphere opening port. The atmosphere is released and the pressure in the syringe (7) is reduced to atmospheric pressure to terminate the discharge of the adhesive and apply the adhesive onto the substrate (1). At this time, the pressure in the syringe (7), which is successively decreased by the pressure sensor (43), is compared with the atmospheric pressure at the installation location of the coating device, which is detected by the pressure sensor (44), and the syringe (7) is compared. When the difference between the internal pressure and the atmospheric pressure falls within the allowable range stored in the RAM (36), it is determined that the atmospheric release has ended, and one of the conditions for starting the coating operation to the next coating position is satisfied. To judge. In addition, the atmospheric release time until the difference between the pressure in the cylinder (7) and the atmospheric pressure falls within the allowable range is stored in the RAM (36). Then, when the application operation start condition is satisfied, the air valve (40) is opened based on the opening operation start command to supply air to the syringe (7) and the application operation to the next application position is started. . That is, according to the coating data shown in FIG. 3, the second nozzle (6) (which is selected based on the nozzle selection data content 2) above the coating position (X2, Y2) on the substrate (1) shown in the second step. The XY table (4) is moved XY so that the discharge port (second from the left in FIG. 2) is positioned. At the same time, the movement to (X2, Y2) is completed, the nozzle (6) is lowered through the nozzle up / down mechanism, and the adhesive is applied onto the substrate (1). In time for this coating operation, the air valve (40) is opened at a certain point after the nozzle (6) has started rising after the previous coating operation is finished, and air is supplied from the air source (41) to the syringe (7) for a pressurizing time T2. After the feeding, the air valve (40) is closed, and at the same time, the air is opened and the discharging operation is terminated to discharge a predetermined amount of adhesive from the nozzle (6). Here, when the air supply operation of this step is completed, the CPU (35) closes the air valve (40) to stop the supply of air from the air source (41) and releases the atmosphere as described above. The air in the syringe (7) is released to the atmosphere until the atmospheric release time stored in the RAM (36) is reached via the air, and the pressure in the syringe (7) is reduced to the atmospheric pressure. The descent is completed and the adhesive is applied on the substrate (1). At the same time, it is judged that the opening to the atmosphere is completed, and it is judged that one of the conditions for starting the coating operation at the next coating position is satisfied. Then, when the application operation start condition is satisfied, the air valve (40) is opened based on the opening operation start command to supply air to the syringe (7) as described above, and the application operation to the next application position is performed. To start.

Hereinafter, a case where the coating operation is continued and a new atmosphere opening time setting operation is performed will be described. When the coating operation is performed based on each step and the nozzle (6) to be used next time is, for example, the first nozzle (6), the mode of the atmospheric opening time setting timing data shown in FIG. 4 is “1” (that is, After the usage time of the nozzle (6) reaches the set usage time, when the nozzle (6) is used next time, the operation of setting the atmospheric opening time is performed.) Therefore, the setting is made in the data at this time. If the usage time has reached "1500" seconds, the atmosphere opening time setting operation is performed as described above at the next usage. That is, when the air supply operation of this step is completed, the CPU (35) closes the air valve (40) to stop the supply of air from the air source (41), and also the syringe (7) via the atmosphere opening port. ), The air inside the syringe (7) is opened to the atmosphere, the pressure inside the syringe (7) is reduced to atmospheric pressure, and the pressure inside the syringe (7) is detected by the pressure sensor (43) and detected by the pressure sensor (44). The allowable range of the difference between the pressure inside the syringe (7) stored in the RAM (36) and the pressure inside the syringe (7) stored in the RAM (36) is compared with the atmospheric pressure at the installation location of the coating device. When it enters inside, it is judged that the atmospheric release is completed, and this atmospheric open time is stored in the RAM (36). Then, when the start condition of the coating operation is satisfied, the air valve (40) is opened based on the opening operation start command to supply air to the syringe (7) to start the coating operation to the next coating position. In this way, when the atmosphere opening time is newly set, the contents of the use timer (50) are cleared. After that, until the usage time reaches "1500" seconds again, it is determined that the atmosphere opening operation is completed based on the atmosphere opening time.

Similarly, also in the second nozzle (6), the operation of setting the atmospheric opening time is performed when the nozzle (6) is first used, and the atmospheric opening operation is terminated based on the atmospheric opening time. In the meantime, after the mode becomes “3” (that is, the usage time of the nozzle (6) becomes the set usage time or the usage count reaches the set usage count, the nozzle (6) is next time. At this time, if the usage time "1000" seconds or the usage count "600" times set in the data is reached, the next use At times, the operation for setting the atmospheric opening time is performed as described above.

Further, in the present embodiment, the data of the atmospheric opening time is obtained at the start of the actual coating operation, and it is judged that the atmospheric opening operation is completed based on this data until the data is reset according to a predetermined condition thereafter. Not limited to this, for example, the first atmospheric release time is set in advance, and the first atmospheric release operation is terminated based on this time data, and during this time, the pressure in the cylinder (7) is changed to the RAM (36). ), The time until the difference between the pressure in the syringe (7) and the atmospheric pressure is within the allowable range is stored, and the preset time is set until the second and subsequent predetermined conditions are satisfied. The atmosphere opening operation may be performed at the stored time instead of the existing time. Further, when the coating device is stopped and restarted, the operation of setting the atmospheric release time may be performed, and based on the latest atmospheric release time data used when it was stopped, the atmospheric release time was released. You may move it.

Further, as shown in the third step of the coating data of FIG. 3, even the same nozzle (6) (nozzle corresponding to nozzle selection data 1) corresponds to an air source (air source selection data 2) having different air pressure. In the step of switching to the air source) and using, the operation for setting the atmospheric opening time is performed at this step as described above. Further, another embodiment using the remaining amount detecting sensor will be described.

When the coating operation of the first step is completed, the atmosphere opening operation is performed, and the atmosphere opening time until the pressure in the cylinder (7) becomes atmospheric pressure at this time is stored in the RAM (36). At this time, if the remaining amount of the adhesive detected by the line sensor (60) is within the range of A to B shown in FIG. 5, it is stored as the atmospheric release time within the range. Therefore, while the remaining amount of the adhesive in the syringe (7) detected by the line sensor (60) is within a predetermined range (A to B shown in FIG. 5), the stored atmospheric release time is used to open the atmosphere. Take action. When the line sensor (60) detects that the remaining amount reaches the level B, the coating operation is continued thereafter, and the pressure detected by the pressure sensors (43) and (44) as described above. Continuing to open to the atmosphere while comparing the above, it is judged that the opening operation to the atmosphere is completed when the difference between the value of the pressure sensor (43) and the value of the pressure sensor (44) is within the allowable range. Then, the atmospheric opening time at that time is stored as the atmospheric opening time within the range of B to C shown in FIG. 5, and the remaining amount of the adhesive in the syringe (7) is within this predetermined range (B to C). During that period, the air is opened based on the data. Further, when the remaining amount reaches the level of C, the atmospheric opening time at that time is grasped and stored in the same manner as described above, and the subsequent coating operation is performed.

Further, the present invention is not limited to the above-mentioned embodiment, and for example, the pressures of both pressure sensors are compared for each application operation of the adhesive, and the atmospheric opening operation is completed by the measured value of the atmospheric opening time at that time. You may let me judge. Furthermore, before the coating operation, the atmospheric release time at atmospheric pressure is obtained in advance, and this is stored as data for each predetermined range of the remaining amount, or stored as data corresponding to the remaining amount, and during the coating operation Either of these data may be used in accordance with the remaining amount detected by the line sensor (60).

The conditions for setting the atmospheric release time are not limited to the use time, the number of uses, the use time or the number of uses of the nozzle (6), and may be, for example, every predetermined number of substrates or when the air supply source is switched. Well, a combination of these conditions may be used. Further, during the coating operation (including when the apparatus is started), the discarding operation (the coating operation that is performed independently of the main coating for cleaning the nozzle (6)) and the trial shot (recognizing the coating diameter to be coated) If the coating operation is performed independently of the main coating), the setting operation of the atmosphere open time may be performed during those operations.

[0024]

[Effect of device]

 As described above, according to the present invention, the atmosphere opening operation can be performed based on the optimum atmosphere opening time in that state.

[Brief description of drawings]

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

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

FIG. 3 is a diagram showing coating data.

FIG. 4 is a diagram showing atmospheric opening time setting timing data.

FIG. 5 is a configuration circuit diagram of a coating device.

[Explanation of symbols]

 (6) Nozzle (7) Syringe (35) CPU (40) Air valve (41) Air source (43) Pressure sensor (44) Pressure sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Kazuhiro Nagao 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. The air supplied from an air source is supplied to the inside of a syringe by opening the opening / closing valve to discharge the coating material in the syringe to the discharge portion of the nozzle, and then the opening / closing valve is closed. Stop the air supply and open the air in the syringe to the atmosphere to apply the discharged coating material to the printed circuit board to complete one coating operation, or open the on / off valve for the air supplied from the air source. It is operated and supplied into the syringe, and the coating material in the syringe is discharged to the discharge part of the nozzle to apply it to the printed circuit board, and then the on-off valve is closed to stop the air supply and the air in the syringe is removed. In a coating device that is opened to the atmosphere and ends one coating operation, a first pressure sensor that detects the pressure in the syringe that sequentially decreases when opening the atmosphere, and a second pressure sensor that detects the atmospheric pressure. , By both sensors The coating device is provided with a control device that determines that the operation of opening to the atmosphere has ended when the difference in the detected pressure falls within a predetermined range. 2. The air supplied from an air source is supplied to the inside of the syringe by opening the opening / closing valve to discharge the coating material in the syringe to the discharge portion of the nozzle, and then the opening / closing valve is closed. Stop the air supply and open the air in the syringe to the atmosphere to apply the discharged coating material to the printed circuit board to complete one coating operation, or open the on / off valve for the air supplied from the air source. It is operated and supplied into the syringe, and the coating material in the syringe is discharged to the discharge part of the nozzle to apply it to the printed circuit board, and then the on-off valve is closed to stop the air supply and the air in the syringe is removed. In a coating device that is opened to the atmosphere and ends one coating operation, a first pressure sensor that detects the pressure in the syringe that gradually decreases when opening the atmosphere after reaching a predetermined condition, and the atmospheric pressure is detected. With a second pressure sensor A first control device that determines that the atmosphere opening operation has ended when the pressure difference detected by the both sensors is within a predetermined range; and the atmosphere opening operation is started and the pressure difference is within an allowable range. And a second control device for determining that the atmosphere opening operation has been completed based on the time stored in the storage device until the application operation is continued and the next predetermined condition is reached. And a coating device.