JPH0282685A - Application apparatus - Google Patents

Abstract

PURPOSE:To keep the discharge of an application agent always constant by calculating the quantity of the application agent discharged next time based on the quantity of the application agent remaining in a syringe and the concerned data stored in first and second memories with a calculating means and controlling a pressure supply valve with a controlling means to discharge the calculated quantity of the application agent. CONSTITUTION:The quantity of a bonding agent remaining in a syringe 10 is measured with a line sensor 50, the number of times of discharged before then is calculated from the measured quantity and the data on the total number of times of discharges to the quantity of the remaining bonding agent with a calculating means in a CPU 57, and the result of the calculation is stored into the specific area in a RAM 58 and indicated on the screen of a TV monitor 54. The discharge by the number of the times of discharges calculated based on the concerned data on the discharge by the total number of times of discharges stored in the RAM 58 is calculated with the calculating means. If the discharge is smaller than the standard discharge, the rate of increase correction of the pressurizing time or pressurizing force is calculated with the calculating means in the CPU 57. If the discharge is larger than the standard discharge, the rate of decrease correction of the pressurizing time or pressurizing force is calculated.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a coating device for applying a coating agent used for fixing chip-shaped electronic components onto a printed circuit board.

(B) Prior Art In conventional coating apparatuses, air pressure from a pressure supply source is applied to the syringe to coat the coating agent in the syringe onto the printed circuit board.

Furthermore, as disclosed in Japanese Patent Application Laid-Open No. 62-176571, the temperature of a viscous substance (similar to the above-mentioned coating agent) in a cylinder container (similar to the above-mentioned syringe) is detected by a temperature detection means, and the temperature change There is a technique that attempts to always discharge a predetermined amount of viscous material by automatically adjusting the set pressure of an automatic pressure regulating valve according to the amount of viscous material.

However, depending on the amount of coating agent in the syringe, even if a pressure commensurate with the temperature change is applied, the amount of coating agent that can be completely discharged varies. In other words, even if the pressure from the pressure supply source is constant, the above phenomenon occurs due to the influence of its own weight due to the difference in the remaining amount of the coating agent.

(c) Problems to be solved by the invention The aim is to always keep the amount of coating agent discharged constant.

(d) Means for Solving the Problems Therefore, the present invention provides a coating device that applies a coating agent used for fixing chip-shaped electronic components onto a printed circuit board by controlling the opening and closing of a pressure supply valve. a first storage means for storing relational data of the number of times of dispensing with respect to the remaining amount of the coating agent; a second storing means for storing relational data of the amount of dispensing with respect to the number of times of dispensing;
Calculate the number of ejections obtained from the relational data stored in the storage means, and calculate the number of ejections obtained from the second
a calculation means for calculating the amount to be discharged next time from the related data stored in the storage means; and a control device for controlling the pressure supply valve so as to obtain the amount to be discharged next time calculated by the calculation means. It has been established.

(f) Effect With the above configuration, the calculation means calculates the amount to be dispensed next time based on the remaining amount of coating agent in the syringe and each related data stored in the first and second storage means, and The pressure supply valve is controlled by the control device so as to achieve the discharge amount.

(F) EXAMPLE An example of the present invention will first be described in detail with reference to FIGS. 1 to 10.

(1) is an XY child table that can be moved in the XY directions, that is, in the horizontal and vertical directions by an X-direction drive motor (2) and a Y-direction drive motor (3); Two printed circuit boards (4) and (5) are placed thereon.

(6) (7) (8) (9) are the 1.2.3.4 application nozzles located above the XY child table 1), and the first and third nozzles (6), (8) is a small diameter nozzle, and the second and fourth nozzles (7) and (9) are large diameter nozzles. <10) (11) (12) (13) are syringes filled with adhesive as a coating agent, and these syringes (
10) (11) (12) (13) are roller holders (14) (
15) (16) (17) and rollers (18) (19) (
It is supported by the 1.2.3.4 cam levers (22), (23), (24), and (25) via 20) and (21).

(26) (27) are these cam levers (22) (23)
) (24) This is a fulcrum shaft provided at the other end of (25).

(28) and (29) are, for example, cams whose arc diameter changes every semicircle. One cam (28) is a cam follower (30
) (31) to the first and second cam levers (22), respectively.
) (23), and the other cam (29) holds 3.4th cam levers (24) and (25), respectively, via cam followers (32) and (33).

And stopper levers (34) (35) (36) (37
) are the 1.2.3.4 cam levers (22) and (23), respectively.
)(24)(25), and is arranged at an intermediate position between the nozzle support part and the contact part of the cam, and each cam lever (22)(25)
3) (24) and (25) can be held individually and selectively.

(38) indicates a pulse motor rotated by a motor drive circuit (38A) that serves as a drive source for the cams (28) and (29), and includes a clutch brake unit (39) and a reducer (40).
A rotational force is applied to the drive shaft (41) via the drive shaft (41).

The cam (28) is rotated by the rotation of the motor (38).
<29) rotate at the same time, but solenoid (42) (4
3> If (44) and (45) are not all excited,
All the stopper levers (34) (35) (36) (37) are
) holds the cam levers (22), (23), (24), and (25).

If the small diameter nozzles (6) (8) are selected here, the solenoids (42) (44) are energized as shown in FIG.
) (36) by the first and third cam levers (22) (2
4) is released and the small diameter portions of the cams (28) and (29) are positioned at the cam followers (30 and 32), and the nozzles (6) and (8) approach the printed circuit boards (4 and 5). adhesive is supplied. Printed circuit board (4) (5)
The position can be changed by horizontally moving the XY child table 1) when each nozzle (6) (7) (8) (9) is pulled upward by the large diameter portion of the cam (28) (29). be exposed.

Also, at this time, the syringe <10) (11) (12) (13
) by increasing the pressure in the nozzles (6) (7) (8
) (9) Supplying adhesive to tip 1 and solenoid (42)
(43) (44) (45) Stopper lever (34)
), (35), (36), and (37) are also performed.

(50) ... is a syringe (10) (11) (12) (
A line sensor that constantly detects the amount of adhesive in the syringes (10), (11), (12), and (13) detects the positions of the floats (51)... placed in the syringes (10), (11), (12), and (13). Detects the amount of adhesive remaining.

(52) is a keyboard (53) as an input device for setting various data, a screen selection key (55) for the monitor television (54), and a start key (55) for starting the coating device.
6), the keyboard (53);
) various data are generated by each key operation.

(57) is a CPU as a control device, which performs given control related to various data settings and control related to coating operation based on various information in response to each key operation.

(58) is a RAM serving as a storage means for storing various setting data set by the keyboard (53).

(59) is an RO that stores programs related to coating operations.
It is M.

<60) is an air pulp as a pressure supply valve that sends air from an air source (61) as a pressure supply source to the syringe (10), and the pressurization time or pressure can be changed by commands from the CPU (57). .

(62) is an interface.

(63) is a discharge start timing sensor, and upon receiving a discharge start signal output from the sensor (63), the CPU (57) causes the coating device to perform a discharge operation.

The operation will be explained in detail below based on the drawings.

FIG. 6 is a diagram showing the relationship between the amount of adhesive remaining in the syringe (10) and the total number of ejections during a series of coating operations. This relational data is stored in a predetermined area in the RAM (58).

First, when the start key (56) of the operation section (52) is pressed, the coating device starts the coating operation under the control of the CPU (57) according to the flowchart shown in FIG. Then, according to the coating data shown in FIG. 8, that is, the discharge ports (not shown) of the coating nozzles (6) and (8) selected based on the contents of the nozzle selection data are placed at the first coating position (X+, yt). Move the XY table (1) in XY so that the Here, the selection based on the contents of the nozzle selection data means the selection based on 10'' and 11'' shown in FIG. That is, “
If it is 0°, use the small diameter nozzle (6) (8) and
In this case, the settings have been made to use the large diameter nozzles (7) and (9).

When the position setting is completed, the pulse motor (38) serving as a drive source is rotated by the motor drive circuit (38A) to rotate the cams (28) and (29). This cam (28
) (29), a coating head (not shown) moves up and down. At this time, the cams (2g) and (29) rotate at the same time due to the rotation of the pulse motor (38), but if the small diameter nozzles (6) and (8) are selected as in this case, as shown in Figure 5. The solenoids (42) and (44) are energized, and the spring (
46) (48) against the stopper levers (34) (36).
) is released from holding the first and third cam levers (22) and (24), and the nozzles (6) and (8 ) is provided with adhesive in close proximity to the printed circuit boards (4) and (5).

The following operations are performed when this adhesive is supplied.

That is, the remaining amount of adhesive in the syringe (10) is detected by the line sensor (50), and based on this value and the data value of the total number of ejections for the remaining amount shown in FIG. The calculation means (not shown) in 57) stores the result in a predetermined enoa in the RAM (5g) and displays it on the screen of the monitor television (54).

Then, based on the relational data of the relationship diagram of the discharge amount to the total number of discharges stored in the RAM (58) shown in FIG.
The calculation means calculates the discharge amount corresponding to the calculated number of discharges, and when the discharge amount is less than the standard discharge amount, the CPU (57) calculates the rate of increase correction of the pressurization time or pressurization force.
It is calculated using the following formula using a calculation means (not shown).

X121= Xtll・(l″″″lflt-191m
, l''9■5trust'') - (I) Standard discharge amount Also, when the discharge amount is greater than the standard discharge amount, the rate of reduction correction of the pressurization time or pressurization force is calculated from the same formula below.

X (2) = X (1, x (1! Discharge amount calculated from Figure 9 -
Standard Discharge Amount) - B) Standard Discharge Amount In the above two formulas, X(I) and Xo) respectively indicate the standard pressurization time or pressurization force and the corrected pressurization time or pressurization force.

Furthermore, when the discharge amount is the same as the standard discharge amount, the set pressurization time or set pressurization force is left unchanged.

For example, if (A) shown in Figure 1 is the remaining amount of adhesive in the syringe (10), the number of discharges up to that point is calculated based on the related data in Figure 6 (Figure 6 (A')). ), the expected discharge amount for the next discharge is calculated from the number of discharges (A') based on the relational data in FIG. 9 (FIG. 9 (A")), and the value (A") is the standard discharge amount (B ”), the formula (I
) to perform incremental correction. Then, based on the data indicating the standard discharge amount for each component stored in the RAM (58) in FIG. 10, the calculated pressurization time or force is adjusted to the standard discharge amount. By applying pressure to the syringe (10) for the time or pressure multiplied by the discharge amount, the optimum amount of adhesive can be discharged. That is, as shown in Fig. 10, the standard discharge rate of the first component is rl, so it is sufficient to apply the corrected pressurization time or pressure as it is. Note that "1" in the 10th rgJ indicates the standard discharge rate. , "2" indicates twice the standard discharge amount. The same applies below.

Thereafter, this operation is repeated one after another until the application of the optimum amount of adhesive is completed. At this time, the number of ejections is sequentially subtracted from the total number of ejections. That is, if the standard discharge amount is "1", "-1" is subtracted from the total number of discharges, and r2. In this case, subtract "-2". The same applies below. Then, the subtraction from the total number of discharges continues, and when a certain set number of discharges is reached, the adhesive is automatically replenished into the syringe (10), the operator is notified to replenish the adhesive, and the applicator is stopped. I'll do what I do.

Note that the method for detecting the remaining amount of adhesive in the syringe (10) is not limited to this embodiment. For example, after ultrasonic waves emitted from a sensor travel through the air and reach the liquid surface, reflected waves and The remaining amount of adhesive may be recognized by converting the distance from the sensor to the liquid surface from the time it takes for the adhesive to return to the sensor.

In addition, the remaining amount of adhesive in the syringe (10) can be detected by measuring the air flow rate during depressurization, the decompression time, the weight of the syringe, the volume of adhesive in the syringe, etc. You may also do this.

Furthermore, when starting the applicator, always use the syringe (1
If the process is carried out after filling the adhesive inside 0), there is no need to use the line sensor (50). That is, by sequentially subtracting from the total number of discharges when the tank is full, the number of discharges up to that point can be recognized.

(g) With a configuration that exceeds the effects of the invention, regardless of the amount remaining in the syringe,
The optimum amount of adhesive can always be discharged.

[Brief explanation of the drawing]

Fig. 1 is a configuration circuit diagram of a coating device to which an embodiment of the present invention is applied, Figs. 2 and 3 are perspective views and plan views showing the coating mechanism, and Figs. 4 and 5 are operating states of the cam lever. FIG. 6 is a diagram showing the relationship between the remaining amount of adhesive and the total number of discharges, FIG. 7 is a flowchart showing the coating operation, FIG. 8 is a diagram showing the program related to the coating operation, and FIG.
The figure shows the relation between the discharge amount and the total number of discharges, and FIG. 10 shows the standard discharge amount for each component. (10) (11) (12) (13)...Syringe,
(50)...Line sensor (57) River CPU,
<58)...RAM.

Claims (1)

[Claims] (1) In a coating device that applies a coating agent used to adhere chip-shaped electronic components onto a printed circuit board by controlling the opening and closing of a pressure supply valve, data relating to the number of discharges and the amount of coating agent remaining in the syringe is collected. A first storage means for storing, a second storage means for storing relational data of the amount of ejection with respect to the number of ejections, and a first storage means for storing relational data of the amount of ejection with respect to the number of times of ejection, and a first storage means for storing relational data of the amount of ejection based on the remaining amount of the coating agent. calculation means for calculating the number of times the discharge has already been performed and the amount to be discharged next time from the related data stored in the second storage means based on the number of times the discharge has already been performed; A coating device comprising: a control device for controlling the pressure supply valve so as to maintain the amount to be discharged.