JP6830179B2 - Paste application method and paste application device - Google Patents

Description

The present invention relates to a paste coating method and a paste coating apparatus for discharging a paste from a coating nozzle to apply the paste to a portion to be coated.

Conventionally, a component mounting technology for mounting a component after applying a paste such as an adhesive to a substrate has been known. In such a component mounting technology, a paste coating equipped with a coating nozzle is used as a device for applying the paste to the substrate. The device is well known. In such a paste coating device, the coating nozzles are relatively moved to a plurality of coating target locations, and the paste is ejected from the coating nozzles to apply the paste to each coating target location (for example,). The following Patent Document 1). When the paste is applied to each of a plurality of coating target locations arranged on the substrate by such a paste coating device, the coating nozzle is moved according to the order of the coating target locations, and the target set for the coating target location The paste is applied to each application target portion while changing the application diameter according to the value.

Japanese Unexamined Patent Publication No. 2016-129860

However, in the above-mentioned paste coating apparatus, when changing the coating diameter of the paste according to the target value, not only the discharge amount (discharge time) of the paste at the time of coating the paste is changed, but also the discharge height (coating on the substrate) is changed. Preparatory operations such as changing the nozzle height) or changing the coating nozzle itself are required. Therefore, when the paste is applied while moving the application nozzles in the order according to the arrangement order of the application target locations, the above preparatory operation is frequently performed, and the paste can be applied with a stable application diameter. There was a problem that it could be difficult.

Therefore, an object of the present invention is to provide a paste coating method and a paste coating apparatus capable of applying a paste to a coating target portion with a stable coating diameter.

The paste coating method of the present invention is a paste coating method in which a coating nozzle is relatively moved to a plurality of coating target locations and the paste is discharged from the coating nozzles to apply the paste to each of the plurality of coating target locations. The grouping step of dividing the plurality of coating target portions into a plurality of groups according to the size of the target value of the paste coating diameter determined for each coating target location, and the plurality of grouping steps. Application order setting that sets the application order of the paste to the plurality of application target locations so that the paste is continuously applied to those belonging to the same group among the plurality of application target locations divided into groups. The paste is applied to the plurality of coating target locations in the step and the coating order set in the coating order setting step, and among the plurality of coating target locations, those belonging to the same group are set for that group. look including a coating execution step of applying the paste representatives coating diameter, coating the order of the paste to the plurality of coating target portion which is set in the coating order setting step, the change representative coating diameter in ascending or descending order In the coating execution step, the coating diameter of the paste is changed by raising and lowering the coating nozzle to change the discharge height .

The paste coating device of the present invention is a paste coating device that applies paste to each of the plurality of coating target locations by moving the coating nozzle relative to a plurality of coating target locations and discharging the paste from the coating nozzles. The grouping processing unit that divides the plurality of coating target locations into a plurality of groups according to the size of the target value of the paste coating diameter determined for each coating target location, and the grouping processing unit. Of the plurality of application target parts divided into a plurality of groups, those belonging to the same group are applied by setting the paste application order to the plurality of application target parts so that the paste is continuously applied. The paste is applied to the plurality of coating target locations in the order setting unit and the coating order set by the coating order setting unit, and the group of the plurality of coating target locations belonging to the same group. A coating execution control unit for applying the paste with the representative coating diameter set for is provided , and the paste application order for the plurality of coating target locations set by the coating order setting unit is such that the representative coating diameter is in ascending or descending order. The paste coating diameter is changed by raising and lowering the coating nozzle to change the discharge height .

According to the present invention, the paste can be applied to the application target portion with a stable application diameter.

Perspective view of the main part of the paste coating apparatus according to the embodiment of the present invention. A block diagram showing a control system of a paste coating apparatus according to an embodiment of the present invention. Top view of an example of a substrate to which a paste is applied by the paste application apparatus according to the embodiment of the present invention. (A) (b) (c) A plurality of groups of a plurality of coating target locations included in the substrate to be coated with the paste coating device according to the embodiment of the present invention according to the size of the target value of the coating diameter. The figure which shows the example divided into (A) (b) (c) The figure which shows an example of the coating order in a group set by the paste coating apparatus in one Embodiment of this invention. (A) (b) (c) The figure which shows another example of the coating order in a group set by the paste coating apparatus in one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The paste coating device 1 shown in FIG. 1 is a device for applying a paste Pst such as an adhesive to each of a plurality of coating target portions 2P included in the substrate 2, and is a substrate transporting unit 11, a head moving mechanism 12, a coating head 13, and a coating head 13. A board camera 14 is provided. In the present embodiment, the left-right direction of the paste coating device 1 as seen from the operator OP is the X-axis direction, and the front-back direction is the Y-axis direction. Further, the vertical direction is the Z-axis direction.

In FIG. 1, the substrate transport unit 11 is composed of a pair of conveyor mechanisms 11a, transports the substrate 2 in the X-axis direction, and positions the substrate 2 at a predetermined working position. The head moving mechanism 12 includes a fixed table 12a extending in the Y-axis direction, a moving table 12b extending in the Y-axis direction, and a moving plate 12c. The moving table 12b is guided by the fixed table 12a and moves in the Y-axis direction, and the moving plate 12c is guided by the moving table 12b and moves in the X-axis direction.

In FIG. 1, two coating heads 13 are attached to the moving plate 12c side by side in the X-axis direction. The two coating heads 13 are moved in the horizontal plane by a combination of the movement of the moving table 12b with respect to the fixed table 12a in the Y-axis direction and the movement of the moving plate 12c with respect to the Y-axis table 22 in the X-axis direction. The two coating heads 13 are individually moved up and down with respect to the moving plate 12c by the lifting motor 12M attached to the moving plate 12c.

In FIG. 1, each coating head 13 includes a paste storage unit 13A for storing the paste Pst and a coating nozzle 13B extending downward from the paste storage unit 13A. Each coating head 13 is provided with a screw 13S that can rotate around the vertical axis inside the paste storage unit 13A, and the paste Pst in the paste storage unit 13A is applied by rotating the screw 13S by a motor (not shown). It is designed to be ejected downward from the lower end of the nozzle 13B.

The discharge amount of the paste Pst discharged from each coating nozzle 13B can be controlled by the rotation amount (rotation time) of the screw 13S. Here, the coating head 13 is configured to push out the paste Pst by the rotation of the screw 13S and discharge it from the coating nozzle 13B. However, the paste storage unit 13A is operated by operating the piston provided in the paste storage unit 13A. The paste Pst inside may be pressurized and pushed downward. In the case of such a configuration, the discharge amount of the paste Pst is controlled by the extrusion time of the paste Pst by a piston or the like. In the present embodiment, the two coating heads 13 have different diameters of the coating nozzles 13B, and when it is desired to change the discharge amount of the paste Pst per unit time, the appropriate one of the two coating heads 13 is selected. Can be used.

In FIG. 1, each coating head 13 is provided with an electropneumatic regulator 13D as a pressure adjusting mechanism and a heater 13H as a temperature adjusting mechanism. The electropneumatic regulator 13D adjusts the pressure of the paste Pst in the paste storage 13A, and the heater 13H adjusts the temperature of the paste Pst in the paste storage 13A.

In FIG. 1, the substrate camera 14 is attached to the moving plate 12c of the head moving mechanism 12 with the image pickup optical axis facing downward. The substrate camera 14 is moved by the head moving mechanism 12, and images the two substrate marks 2m provided on the substrate 2 positioned at the working position by the substrate transport unit 11 and the plurality of coating target points 2P included in the substrate 2 from above. To do.

In FIG. 2, the control device 20 included in the paste coating device 1 is a substrate transporting unit 11 for transporting and positioning the substrate 2, a head moving mechanism 12 for moving the coating head 13, and an elevating motor 12M for raising and lowering the coating head 13. The screw 13S provided in the coating head 13 controls the ejection operation of the paste Pst from the coating nozzle 13B and the imaging operation by the substrate camera 14. Further, the control device 20 adjusts the pressure of the paste Pst in the paste storage unit 13A by the electropneumatic regulator 13D and adjusts the temperature of the paste Pst in the paste storage unit 13A by the heater 13H. The image data captured and acquired by the substrate camera 14 is sent to the control device 20, and the control device 20 processes the image data (image recognition processing).

In FIG. 2, the control device 20 includes a storage unit 20a, a grouping processing unit 20b, a coating order setting unit 20c, and a coating execution control unit 20d. The storage unit 20a has data on the position (coordinates) of each coating target location 2P included in the substrate 2 and the paste Pst defined in each coating target location 2P for each type of substrate 2 that can be carried into the paste coating device 1. Data of the target value Dm (diameter of the circle shown by the alternate long and short dash line in FIG. 3) of the coating diameter of the above is stored.

The coating diameter of the paste Pst refers to the diameter of the paste Pst spread out in a circle when the paste Pst actually applied to the coating target portion 2P on the substrate 2 is viewed from above, and is the target value Dm of the coating diameter. Is a target value when the paste Pst is discharged so as to have the coating diameter. FIG. 3 shows an example in which the target value Dm of the coating diameter defined for each coating target portion 2P is slightly larger than the outer diameter Dt of the coating target portion 2P, but the outer diameter of the coating target portion 2P is shown. The relationship between Dt and the target value Dm of the coating diameter defined in the coating target portion 2P may be the opposite of this, or both may be the same.

The grouping processing unit 20b performs a grouping process and a representative coating diameter setting process on the substrate 2 carried in by the substrate transport unit 11. In the grouping process, a plurality of coating target locations 2P provided on the substrate 2 are subjected to the size of the target value Dm of the coating diameter of the paste Pst determined for each coating target location 2P (the level of the size of the target value Dm of the coating diameter). ), By dividing into a plurality of groups Gr. In the representative coating diameter setting process, a representative coating diameter as a coating diameter common to a plurality of coating target locations 2P belonging to the group Gr is set for each of the plurality of group Grs generated by performing the grouping process. Do by.

In the grouping process, the grouping processing unit 20b reads out the data of the coating diameter defined for each coating target portion 2P from the storage unit 20a, and has the same level of the coating diameter size (the coating diameter is large). (Things within a certain size range) are picked up and put together. In the representative coating diameter treatment, an average value of the target value Dm of the coating diameters of the plurality of coating target portions 2P belonging to each group Gr is set. The average value of the target value Dm of the coating diameter referred to here is, for example, the arithmetic mean value of the target value Dm of the coating diameter of a plurality of coating target locations 2P belonging to the group Gr, or between the minimum value and the maximum value. Median, etc. Alternatively, the representative coating diameter may be determined first, and the range of the target value Dm of the coating diameter may be determined based on the representative coating diameter. In this case, the grouping processing unit 20b does not need to perform the representative coating diameter setting processing.

The position data of each coating target portion 2P belonging to each of the plurality of group Grs generated by grouping by the grouping processing unit 20b as described above is the data of the representative coating diameter set in the group Gr. It is associated and stored in the storage unit 20a.

In FIGS. 4A, 4B, and 4C, a total of 32 coating target locations 2P arranged in 4 rows and 8 columns on the substrate 2 are targeted for coating diameters defined for each coating target location 2P. An example of the case where the group is divided into three groups Gr according to the magnitude of the value Dm is shown. Here, it is assumed that each of the 32 application target portions 2P belongs to one of the three groups Gr according to the level of the size of the coating diameter, "small", "medium", and "large".

In FIG. 4A, a plurality of coating target locations 2P (indicated by black circles in the figure) in which the target value Dm of the coating diameter is at the “small” level are collectively grouped as one group Gr, and the representative coating diameter is set to “Small”. Small (for example, 0.1 mm) ". In FIG. 4 (b), a plurality of coating target locations 2P (indicated by black circles in the figure) whose target value Dm of the coating diameter is at the “medium” level are collectively grouped as one group Gr, and the representative coating diameter is set to “medium”. Medium (for example, 0.2 mm) ". In FIG. 4C, a plurality of coating target locations 2P (indicated by black circles in the figure) in which the target value Dm of the coating diameter is at the “large” level are collectively grouped as one group Gr, and the representative coating diameter is “ Large (for example, 0.3 mm) ".

In the coating order setting unit 20c, after the grouping processing unit 20b performs the grouping processing, the paste Pst is continuously applied to the plurality of coating target portions 2P provided on the substrate 2 that belong to the same group Gr. (In other words, the paste Pst is applied to the application target portion 2P belonging to one group Gr, and then the paste Pst is applied to the application target portion 2P belonging to the next group Gr). , The application order of the paste Pst is set for a plurality of application target portions 2P included in the substrate 2.

When the coating order setting unit 20c sets the coating order, first, the coating diameter changing order is set. The coating diameter change order is an order in which the coating diameter (representative coating diameter) is changed when the paste Pst is applied according to the set coating order, and is generated by grouping by the grouping processing unit 20b. Corresponds to the order of application between the plurality of groups Gr. The coating diameter change order may be set based on any standard, but it is preferable to set the representative coating diameter so as to change in ascending or descending order (the reason will be described later).

After setting the coating diameter change order, the coating order setting unit 20c sets the coating order within the group for each group Gr. The application order in the group is the application order of the paste Pst in the group Gr for a plurality of application target locations 2P belonging to each group Gr. The order of application within the group can be set according to any standard. The reference may be, for example, the order in which the coating target locations 2P arranged on the substrate 2 are arranged, or the order in which the relative movement distance of the coating head 13 with respect to the substrate 2 is set to be shorter overall. It may be.

5 (a), (b), and (c) show that the order of application within the group in each group Gr set as shown in FIGS. 4 (a), (b), and (c) is arranged on the substrate 2. An example is shown in the case where the application target locations 2P are set in the order of arrangement. 6 (a), (b), and (c) show the order of coating within the group in each group Gr set as shown in FIGS. 4 (a), (b), and (c) of the coating head 13 with respect to the substrate 2. An example is shown when the relative movement distance is set to be shorter as a whole.

When the coating order setting unit 20c sets the coating diameter change order and the coating order within the group for each group Gr as described above, the paste Pst for all the coating target portions 2P provided on the substrate 2 is integrated. Set the application order. Then, the coating execution control unit 20d executes the application of the paste Pst to the plurality of coating target portions 2P in the coating order set by the coating order setting unit 20c. At this time, for those belonging to the same group Gr among the plurality of application target locations 2P, the paste Pst is applied with the representative coating diameter set for the group Gr.

When applying the paste Pst as described above, the control device 20 controls the electropneumatic regulator 13D to adjust the pressure of the paste Pst in the paste storage unit 13A to an appropriate pressure, and at the same time, The heater 13H is controlled so that the temperature of the paste Pst in the paste storage unit 13A is adjusted to an appropriate temperature. This makes it possible to apply the paste Pst at the optimum discharge pressure and discharge time (discharge amount) according to the properties (particularly viscosity) of the paste Pst, and the coating diameter of the paste Pst at the time of actual application is set to the set coating diameter. It is possible to match with high accuracy.

Next, the execution procedure (paste coating method) of the paste Pst coating operation by the paste coating device 1 will be described. When the control device 20 executes the paste Pst coating operation on the substrate 2, the substrate transport unit 11 first carries in the substrate 2 sent from the outside and positions it at the working position. Then, the coating head 13 is moved by the head moving mechanism 12, and the substrate camera 14 is made to image the two substrate marks 2m. Then, image recognition is performed based on the obtained image data, and the position of the substrate 2 in the substrate transport unit 11 is grasped.

After grasping the position of the substrate 2, the control device 20 in the grouping processing unit 20b receives data on the positions of all the coating target locations 2P on the substrate 2 and the coating target location 2P according to the type of the loaded substrate 2. The data of the coating diameter of the paste Pst determined for each is read from the storage unit 20a. Then, after dividing the plurality of coating target portions 2P into a plurality of group Grs according to the size of the target value Dm of the coating diameter of each coating target portion 2P read out (grouping step), each group Gr is represented. Set the coating diameter (representative coating diameter setting process).

When the control device 20 performs the above grouping in the grouping processing unit 20b, the same group Gr among the plurality of coating target locations 2P divided into a plurality of group Grs in the grouping step in the coating order setting unit 20c. For those belonging to, the application order of the paste Pst is set for a plurality of application target portions 2P so that the paste Pst is continuously applied (application order setting step).

After setting the coating order of the paste Pst in the coating order setting unit 20c, the control device 20 executes the coating of the paste Pst to all the coating target portions 2P provided on the substrate 2 in the set coating order (coating execution step). .. In this coating execution step, the paste Pst is applied to a plurality of coating target locations 2P belonging to the same group Gr with the representative coating diameter set for the group Gr.

In the coating execution step, the control device 20 moves the coating head 13 relative to the substrate 2 based on the position data of each coating target portion 2P read from the storage unit 20a by the coating execution control unit 20d. After adjusting the height control (discharge height) of the coating head 13 by the elevating motor 12M, the screw 13S is controlled to rotate. In the coating of the paste Pst, it is necessary to increase the discharge amount of the paste Pst as the target value Dm of the coating diameter is larger. Therefore, the discharge height of the coating nozzle 13B is set so that the height from the substrate 2 increases as the coating diameter (representative coating diameter) increases.

When the control device 20 executes the coating execution step, the paste Pst is applied to all the coating target portions 2P included in the substrate 2 with the coating diameter determined for each coating target portion 2P. At this time, for example, when the coating diameter change order is set to be in ascending order in the coating order setting step, the paste Pst is applied in the order in which the representative coating diameter increases in the order of “small” → “medium” → “large”. Is executed (FIG. 5 (a)-> FIG. 5 (b)-> FIG. 5 (c) or FIG. 6 (a)-> FIG. 6 (b)-> FIG. 6 (c)). In addition, when the coating diameter change order is set to be descending in the coating order setting process, the paste Pst is applied in the order in which the representative coating diameter becomes smaller from "large" → "medium" → "small". (FIG. 5 (c)-> FIG. 5 (b)-> FIG. 5 (a) or FIG. 6 (c)-> FIG. 6 (b)-> FIG. 6 (a)).

In the above-mentioned paste Pst coating operation, when the coating order between the group Grs progresses and it becomes necessary to change the coating diameter, the control device 20 determines the paste Pst discharge time at the time of coating the paste Pst. Not only directly changing the rotation time of the screw 13S), but also changing the discharge height, which is the height of the lower end of the coating nozzle 13B with respect to the substrate 2, and in some cases, changing the coating nozzle 13B (coating head 13) itself. Preparatory movements such as changing are required. In the present embodiment, for example, even if there are 32 coating target locations 2P and the coating diameters between adjacent coating target locations 2P are always different, the number of group Gr is three. If so, only two preparatory operations are required. As described above, according to the paste coating device 1 (paste coating method) in the present embodiment, the number of preparatory operations can be reduced.

If the arrangement of the coating target portions 2P on the substrate 2 and the arrangement of the target value Dm of the coating diameter are not orderly, the movement path of the coating head 13 with respect to the substrate 2 becomes complicated, and a series of paste Pst is formed. In some cases, the time required for the coating operation may be longer than when the coating head 13 is simply moved according to the arrangement of the coating target portions 2P. However, when the ability to apply the paste Pst with a stable coating diameter is prioritized over the shortening of the time required for the work, the paste application method in the present embodiment exerts a very large effect.

As described above, the coating order set in the coating order setting step (coating order setting unit 20c) is preferably set so that the representative coating diameter changes in ascending or descending order. By doing so, the amount of elevation when the coating head 13 (that is, the coating nozzle 13B) is raised and lowered with the change of the coating diameter is small, and the preparatory operation can be shortened by that amount to improve the tact. Can be done.

As described above, in the paste coating device 1 (coating method) in the present embodiment, a plurality of coating target locations 2P are grouped according to the size of the target value Dm of the coating diameter determined for each coating target. The application order of the paste Pst is set so that the paste Pst is continuously applied to the plurality of application target portions 2P that belong to the same group Gr. Then, when the paste Pst is applied in the set application order, the paste Pst is applied to the application target portion 2P belonging to the same group Gr with the representative coating diameter set for that group. There is. Therefore, the number of preparatory operations required when changing the coating diameter of the paste Pst can be reduced, and the paste Pst can be applied to the coating target portion 2P with a stable coating diameter.

Although the embodiments of the present invention have been described so far, the present invention is not limited to the above-described embodiments. For example, in the above-described embodiment, the plurality of coating target locations 2P are divided into three groups Gr of "small", "medium", and "large" according to the size of the target value Dm of the coating diameter. It is only an example and may be divided into two or four or more groups.

Provided are a paste coating method and a paste coating apparatus capable of applying a paste to a coating target portion with a stable coating diameter.

1 Paste coating device 2P Coating target location 13B Coating nozzle 20b Grouping processing unit 20c Coating order setting unit 20d Coating execution control unit Dm Target value of coating diameter Gr group Pst paste

Claims (2)

This is a paste coating method in which a paste is applied to each of the plurality of coating target locations by relatively moving the coating nozzles to a plurality of coating target locations and discharging the paste from the coating nozzles.
A grouping step of dividing the plurality of coating target locations into a plurality of groups according to the size of the target value of the paste coating diameter determined for each coating target location.
Of the plurality of application target portions divided into the plurality of groups in the grouping step, those belonging to the same group are coated with the paste on the plurality of application target locations so that the paste is continuously applied. The coating order setting process for setting the coating order and
The paste is applied to the plurality of coating target locations in the coating order set in the coating order setting step, and those belonging to the same group among the plurality of coating target locations are representatives set for the group. and the application execution step of applying a paste in the coating diameter seen including,
The coating order of the paste to the plurality of coating target portions set in the coating order setting step is set so that the representative coating diameter changes in ascending or descending order.
In the coating execution step, a paste coating method is characterized in that the coating diameter of the paste is changed by raising and lowering the coating nozzle to change the discharge height . A paste coating device that applies paste to each of the plurality of coating target locations by moving the coating nozzles relative to a plurality of coating target locations and discharging the paste from the coating nozzles.
A grouping processing unit that divides the plurality of coating target locations into a plurality of groups according to the size of the target value of the paste coating diameter determined for each coating target location.
Of the plurality of application target locations divided into the plurality of groups by the grouping processing unit, those belonging to the same group are pasted on the plurality of application target locations so that the paste is continuously applied. The coating order setting unit that sets the coating order of
The paste is applied to the plurality of coating target locations in the coating order set by the coating order setting unit, and among the plurality of coating target locations, those belonging to the same group are representatives set for the group. and a coating execution control unit for applying the paste coating diameter,
The application order of the paste to the plurality of application target portions set by the application order setting unit is set so that the representative application diameter changes in ascending order or descending order.
A paste coating apparatus characterized in that the coating diameter of the paste is changed by raising and lowering the coating nozzle to change the discharge height .

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