JP2003275649A - Coating device for high viscosity fluid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To hold a trial coating tape evenly. <P>SOLUTION: A middle ventilation plate 324 and an upper ventilation plate 326 are superposed on a supporting base 322 and fixed by a guide member 330 and bolts 340. The negative pressure supplied from a negative pressure supply device 270 to a negative pressure supply part 264 is supplied to the middle ventilation plate 324 by way of a hole of the supporting base 312 and a groove 360. When the negative pressure supplied to the middle ventilation plate 324 is diffused by a slot 374 provided in the middle ventilation plate 324 and supplied to the upper ventilation plate 326, outside air is sucked from a plurality of holes 376 provided in the upper ventilation plate 326, and the back face of a coating tape 202 is adhered. The front face of the coating tape 202 is adhered and held by a holding device 204 so as to be a flat face such as a holding face 260, and the deformation of the coating tape 202 is prevented by supporting the coating tape 202 from the lower part. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-viscosity fluid coating device for discharging a high-viscosity fluid from a discharge nozzle to coat it on a surface to be coated, and particularly to inspect the amount of adhesive applied. The present invention relates to prevention of sagging of the coating tape for applying the coating.

[0002]

2. Description of the Related Art It is already known to perform preliminary ejection such as discarding and trial ejection in an apparatus for ejecting a highly viscous fluid such as an adhesive or cream-like solder from an ejection nozzle to apply it to an application target surface. . Disposal is to discharge the high viscous fluid in or near the discharge nozzle that is no longer suitable for application due to deterioration such as viscosity change exceeding the allowable limit, and ensure normal discharge. Trial ejection is performed by detecting the ejection position, ejection amount, etc. of the high-viscosity fluid in a state where ejection is normally performed, and correcting the relative movement distance between the ejection nozzle and the application target surface This is a coating applied for setting.

It is also already known to carry out the preliminary striking on a coated tape which is supplied in the form of a roll tape. In that case, it is desirable that the surface of the coated tape is as flat as possible. However, since the coated tape is flexible, wrinkles and slack are likely to occur during tape feeding. In order to make the coated tape surface flat, there is a tape feeding device that applies tension to both sides in the longitudinal direction of the coated tape by applying back tension to the supply side of the roll tape.
The applied tape may be distorted due to an increase in tension when the tape is fed, so that part of the applied tape may float.

[0004]

[Problems to be solved by the invention, means for solving the problems, and effects]

In view of the above circumstances, the present invention has been made to solve the above problems, and has an object to maintain a pre-strike area of a coating tape as flat as possible in a device for holding and moving the coating tape. According to the present invention, the discarding device of each of the following aspects can be obtained. Similar to the claims, each mode is divided into paragraphs, each paragraph is numbered, and the numbers of other paragraphs are referred to as necessary. This is just to facilitate understanding of the present invention,
The technical features and combinations thereof described in the present specification should not be construed as being limited to those described in the following sections. Moreover, when a plurality of items are described in one section, it is not always necessary to adopt the plurality of items together. It is also possible to select and use only some of the items.

In the following items, (1) corresponds to claim 1, (2) to claim 2, and (3) to claim 3.
And (8) corresponds to claim 4, respectively.

(1) A high-viscosity fluid coating device for discharging a high-viscosity fluid from a discharge nozzle to coat an object to be coated,
A feeding device that feeds a coating tape having a longitudinal shape, which is different from the object to be coated, in a longitudinal direction thereof, and has a flat upper surface, and a part of the coating tape fed by the feeding device is provided on the upper surface. A high-viscosity fluid coating device, comprising: a holding table that sucks and holds the negative pressure. By sucking the coating tape on the flat surface of the holding base, it is possible to prevent the lifting due to the flexibility of the coating tape and the generation of wrinkles due to slack, and to make the sucked coating tape surface a flat surface. The suction of the coating tape can be performed by supplying a negative pressure to the surface of the holding table. (2) The high-viscosity fluid application device according to item (1), which includes a plurality of holes on the surface of the holding base and includes a negative pressure supply device that supplies a negative pressure to the holes via a pressure supply passage. The holes on the surface may have any shape such as a circular hole, an irregular hole, and an elongated hole as long as the coated tape is supported flat on the surface of the holding table and the floating and movement of the coated tape can be prevented. However, if the diameter of the circular hole or the width of the long hole is too large, the support of the coated tape may be insufficient. (3) At least the surface of the holding base is made of a porous material, and the high pressure according to the item (1) or (2) includes a negative pressure supply device for supplying a negative pressure to the porous portion via a pressure supply passage. Viscous fluid application device. Examples of this item subordinate to item (2) include an aspect in which the central portion of the surface of the holding table is a porous material and holes are provided in the peripheral portion, and an opposite aspect. In addition, a mode in which holes are provided in at least a part of the porous plate is also applicable. (4) The high viscous fluid application device according to any one of items (1) to (3), wherein the application tape is adsorbed on at least a part of a contact surface between the front surface of the holding table and the back surface of the application tape. The coating tape does not necessarily need to adsorb the entire portion supported by the holding table. For example, when only a part of the supported portion is adsorbed, a highly viscous fluid such as an adhesive may be applied to the adsorbed portion. Are adsorbed over substantially the entire width at two points separated in the feeding direction of the sheet, and the portion between these two points is not adsorbed but is supported by the holding table in a flatly extended state. In this case, an adhesive or the like may be applied to the portion between the two places. In that case, it may or may not be applied to the adsorbed portion. (5) The high viscosity according to any one of (2) to (4), wherein the pressure supply passage includes at least one pressure diffusion plate that diffuses the supplied negative pressure and supplies it to an adjacent surface. Fluid application device. By applying the negative pressure, which is supplied one-dimensionally by a vacuum hose or pipe, to the adjacent surface by giving a two-dimensional spread by the pressure diffusion plate, the coated tape can be adsorbed in a substantially wider range. It will be possible. Also,
It is possible to supply a negative pressure that is as uniform as possible to the adsorption range, or to supply a large amount of negative pressure to a portion where strong adsorption is desired. (6) The high-viscosity fluid coating device according to item (5), wherein the pressure diffusion plate is another pressure diffusion plate that is superposed on it or a pressure diffusion support plate that supports a coating tape. The surface of the holding table is to support the coated tape and to suck it.
It has two roles and is considered as a pressure diffusion support plate. The holding base may have only one pressure diffusion support plate or may have a plurality of pressure diffusion support plates. For example, it is possible to supply a negative pressure to a wide range while supporting the pressure diffusion support plate on the surface of the holding table with at least one pressure diffusion support plate. (7) At least the surface of the holding table is made of metal
The highly viscous fluid application device according to any one of items (1) to (6). (8) The high-viscosity fluid application device according to any one of items (2) to (7), wherein the negative pressure supply device can supply a plurality of negative pressures having different strengths. If negative pressures of multiple strengths can be supplied, for example, supply a strong negative pressure to adsorb the coating tape and weaken the negative pressure when sending the coating tape (supplying a weak negative pressure). You can Although it is possible to stop the supply of the negative pressure when the coating tape is fed, it is preferable to reduce the negative pressure in order to prevent the coating tape from rising from the holding table. (9) The high-viscosity fluid application device according to item (8), wherein the negative pressure supply device includes at least one pressure adjusting device. The pressure adjusting device has, for example, a pressure adjusting valve, and an appropriate negative pressure can be supplied by adjusting the pressure adjusting valve. It is useful when only one kind of negative pressure can be obtained from the negative pressure source. (10) At least one of the holding table and the feeding device includes a guide portion that restricts movement of the coating tape in a direction perpendicular to the traveling direction, according to any one of (1) to (9). High viscosity fluid application device. (11) The highly viscous fluid according to any one of items (1) to (10), which includes the coating tape as a constituent element, and at least the surface of the coating tape is made of a synthetic resin to form a smooth coating surface. Coating device. (12) A tape supply device for holding the coated tape wound in a roll shape rotatably around its roll axis is provided, and the tape supply device is opposite to the feeding direction of the coated tape supplied on the holding table. The high-viscosity fluid application device according to any one of items (1) to (11), which includes a reverse tension applying means for applying a tension in the direction. By providing the reverse tension applying means, for example, it becomes possible to keep the coating tape substantially flat even when the supply of the negative pressure is cut off. For example, when negative pressure is supplied to the holding table, if the coating tape is lifted from the holding table, it may not be adsorbed, but this can be avoided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION [Embodiment: Perforated Plate Type] An embodiment of the present invention will be described in detail below with reference to the drawings. 1 and 2 show an adhesive applying device for applying an adhesive to a printed wiring board, and in the drawings, reference numeral 10 is a base as an apparatus main body. A printed wiring board moving unit 14 for holding a printed wiring board 12 as a circuit substrate as an application object and moving it in the horizontal Y-axis direction (vertical direction in FIG. 1) is provided on the base 10. , First, second, and third coating heads 16A, 16B, 16C, and are bonded to the printed wiring board 12 by movement in the X-axis direction (horizontal direction in FIG. 1) which is horizontal and orthogonal to the Y-axis direction. Adhesive application unit 1 which is a high-viscosity fluid application unit for applying agents
And 8 are provided. In this adhesive application device,
A horizontal XY coordinate plane is set for the whole,
In this XY coordinate plane, one of the two axes orthogonal to each other is the X axis and the other is the Y axis.

A loading device 22 is provided on the base 10 in parallel with the X-axis direction for loading the printed wiring board 12 into the printed wiring board moving unit 14, and the printed wiring board 12 is carried out from the printed wiring board moving unit 14. And a carry-out device 24 for carrying out. Each of the carry-in device 22 and the carry-out device 24 is configured by a belt conveyor, and each has a pair of guide rails 26, 28, a conveyor belt (not shown) provided on each of the guide rails 26, 28, and the pair of conveyor belts. It has a belt circling device (not shown) that circulates in a synchronized manner.

The printed wiring board 12 is placed on a pair of conveyor belts and is conveyed while being guided by a pair of guide rails 26 and 28 by the conveyor belts being rotated. One of the guide rails 26 is a fixed guide rail that is fixed in position, and the other guide rail 28 is a movable guide rail that can be moved toward and away from the fixed guide rail. Hereinafter, the guide rail 26 will be referred to as the fixed guide rail 26, and the guide rail 28 will be referred to as the movable guide rail 28. The movable guide rail 28 is moved in the Y-axis direction by an approaching / separating device (not shown) or a conveyor width changing device, so that the space between the movable guide rail 28 and the fixed guide rail 26 is equal to the printed wiring board 12.
Is adjusted according to the width of.

The printed wiring board moving unit 14 includes a Y-axis slide 40 (see FIG. 2) provided on the base 10 so as to be movable in the Y-axis direction. The Y-axis slide 40 is shown in FIG.
A Y-axis slide moving device 46 including a Y-axis slide moving motor 42, a ball screw 44 as a feed screw, and a nut (not shown) shown in FIG. 1 is guided by a guide device including a guide rail 48 serving as a pair of guide members. It can be moved axially. A pair of support walls 52, 54 extending in the X-axis direction are provided on the upper surface of the Y-axis slide 40, and a belt or the like for carrying the printed wiring board 12 is provided on each. Although not shown, a positioning support device is provided on the Y-axis slide 40 to position and support the printed wiring board 12 in a horizontal posture, and an adhesive is applied to the surface or the upper surface thereof. The adhesive application surface 56 (see FIG. 5) as the application target surface is kept horizontal.

The adhesive application unit 18 will be described. As shown in FIG. 1, a base 62 supported by a pair of columns 60 is provided on the base 10. The base 62 is located above the printed wiring board moving unit 14, and an X-axis slide 64 is provided on the base 62 so as to be movable in the X-axis direction. The X-axis slide 64 includes an X-axis slide moving device 72 including a motor 66 for X-axis slide movement as a drive source, a ball screw 68 as a feed screw, and a nut 70 (see FIG. 4), and a pair of guide rails 74 as guide members. It is moved in the X-axis direction while being guided.

On the X-axis slide 64, the coating head 1 is provided.
6A, 16B and 16C are respectively provided so as to be able to ascend and descend and rotatable about their vertical axes, and a head elevating device 80 as an approaching / separating device for approaching and spacing the coating heads 16A, 16B and 16C from the printed wiring board 12.
And a head rotating device 82 for rotating about a center line or a vertical axis. By moving the X-axis slide 64, the coating heads 16A, 16B, 16C and the like are moved in the X-axis direction. The X-axis slide 64 and the X-axis slide moving device 72 form a head moving device 84. Coating heads 16A, 16B, 16C, lifting device 80
The configuration of the rotation device 82 is the same as that of the high-viscosity fluid application device described in Japanese Patent Publication No. 5-18633, and will be briefly described. Also, three coating heads 16A, 16B, 1
The configuration of 6C is the same, and one will be described as a representative.

As shown in FIG. 4, a Z-axis slide 90 is provided on the front surface of the X-axis slide 64 so as to be movable in the Z-axis direction, and is moved in the Z-axis direction by a Z-axis slide moving device 92. . The Z-axis direction is the X-axis direction and the Y-axis direction.
It is a direction perpendicular to the axial direction, and is a vertical direction in the illustrated example. The Z-axis slide moving device 92 uses a Z-axis slide moving motor 94 as a drive source, and the rotation of the Z-axis slide moving motor 94 is converted into a vertical movement by a gear, a fan gear, a pinion and a rack (not shown), An elevating member 96 provided integrally with the rack is moved up and down, and a Z-axis slide 90 connected to the elevating member 96 by a connecting member 98 is guided and moved up and down by a guide device including a guide rail 100 serving as a guide member. , The coating head 16A held by the Z-axis slide 90 is moved up and down.
It should be noted that when the elevating member 96 is excessively lowered, the spring member 102, which is an elastic member, is compressed and the Z-axis slide 90 and the elevating member 9 are moved.
6 is allowed by being moved relative to each other.

The coating head 16A, as shown in FIG.
It has a discharge nozzle 110 and a syringe 112 as an adhesive container. The discharge nozzle 110 is a cylindrical holder 11
One discharge pipe 116 is fixed to the tip of No. 4. The holder 114 is fitted into an adapter 118 fixed to the syringe 112 so as not to rotate relative to it, and is fixed by a nut 120. When the discharge pipe 116 is replaced, the holder 114 is replaced. Further, the holder 114 is provided with a stopper 122, which abuts on the printed wiring board 12 at the time of applying the adhesive to secure a certain gap between the holder 114 and the discharge pipe 116. The diameters of the discharge pipes 116 are different in the three coating heads 16A, 16B, 16C, but they may be the same.

The syringe 112 has a cylindrical shape with a bottom, contains an adhesive which is a kind of highly viscous fluid, and its opening is closed by a cap 130, and the syringe 11
The space inside 2 is connected to the positive pressure supply device 138 by a connection fitting 132 and a hose 134 (see FIG. 4). Electromagnetic directional control valve 136 provided in the middle of the hose 134
By switching (see FIG. 12), the syringe 112 is selectively communicated with the positive pressure supply device 138 and the atmosphere, and when pressurized air is supplied, the adhesive passes through the holder 114 and the discharge pipe 116. It is discharged and applied to the adhesive application surface 56 of the printed wiring board 12. The adhesive is applied in spots, for example.

The coating head 16A is provided on the Z-axis slide 90 so as to be relatively rotatable and not relatively movable in the axial direction. The head rotating device 82 includes the head rotating motor 1
40 as a drive source, and the rotation thereof is transmitted through a pulley 142, a belt 144 (see FIG. 4), a small diameter gear 146 (see FIG. 3), and a large diameter gear 148 (see FIGS. 3 and 5), and the coating head 16A is rotated about the vertical axis. In the coating head 16A, for example, one discharge nozzle 110 may be provided with two discharge pipes 116. In this case, the coating head 16A is rotated so that the two discharge pipes 116 are aligned in a different direction. be changed.

As shown in FIG. 3, the adhesive application unit 18 is also provided with a reference mark camera 160 as an image pickup device for reading a plurality of reference marks (not shown) provided on the printed wiring board 12. . In the present embodiment, the fiducial mark camera 160 is composed of a CCD camera (which is a monochrome camera) that is a surface imaging device, and the application head 16 of the X-axis slide 64.
It is provided at a position adjacent to A, 16B, 16C,
The positions of the discharge nozzles 110 of the coating heads 16A, 16B, and 16C in the Y-axis direction, and the reference mark camera 160.
The position of the imaging center in the Y-axis direction is set to be the same. An illumination device 162 is provided together with the reference mark camera 160 so as to illuminate a subject. The reference mark camera 160 takes an image of the reference mark before the application of the adhesive to the printed wiring board 12 is started, and the X-axis of a plurality of application positions set on the adhesive application surface 56 based on the image pickup data. Each positional deviation in the Y-axis direction is obtained, the stop positions of the coating heads 16A, 16B, 16C are corrected so that the adhesive is accurately coated.

A pair of support walls 5 for the Y-axis slide 40.
2 and 54, the outer surface of one support wall 52 is shown in FIG.
As shown in FIG. 5, a coating tape holding and moving device 200 is provided. Details of the coating tape holding and moving device 200 are shown in FIG. 6 and FIG.
The apparatus main body supporting the whole is omitted for easy understanding of the configuration. The coating tape holding and moving device 200 is
Holding device 204 for holding the coating tape 202 on its surface
And a feeding device 206 for feeding the coating tape 202.

The roll tape 220 for supplying the coating tape 202 to the holding device 204 is obtained by winding the coating tape 202 around a reel 224. In this embodiment, the roll tape 220 is made of resin and has a white coating surface. ing. The reel 224 includes a hollow shaft portion 226 and a pair of disc-shaped side wall portions 2 extending outward from the hollow shaft portion 226 in the radial direction.
28 and. As shown in FIG. 7, the pair of side wall portions 228 are provided at a distance in the axial direction of the hollow shaft portion 226 to prevent the roll tape 220 formed by winding the coating tape 202 around the hollow shaft portion 226 from collapsing. ing. Even if the coating surface of the coating tape 202 is not white,
For example, a color with high brightness such as yellow may be used. Further, the material of the coating tape 202 may be any as long as the applied adhesive does not bleed onto the coating surface, has no air permeability when sucked at a negative pressure, and hardly deforms when sucked. For example, it is possible to employ a tape whose surface is coated with paper or cloth and which is coated with resin.

The fixed shaft 232 is fixed to a bracket 230 fixed to the main body (not shown) of the coating tape holding and moving device 200, and the hollow shaft portion 226 of the reel 224 is rotatably fitted to the fixed shaft 232. As a result, the roll tape 220 is rotatably supported by the fixed shaft 232. Axial relative movement of the reel 224 with respect to the fixed shaft 232 is prevented by the pin 240 and the spacers 246 and 248. In the present embodiment, the fixed shaft 23
2, the spacers 246, 248, the pin 240 and the bracket 230 constitute a coating tape supply device. It should be noted that the coating tape supply device is the hollow shaft portion 22 of the reel 224.
It is not essential to hold 6 and the roll tape 220 may be held so as to be rotatable around an axis parallel to the roll axis. It is desirable that movement of the roll tape 220 other than rotation is restricted, and appropriate resistance to rotation is imparted so that the roll tape 220 does not continue to rotate due to inertial force after the feeding of the coating tape 202 is stopped. Is desirable.

As will be described later, the flat holding surface 260 of the holding device 204 is provided with a large number of holes having a diameter of 0.3 mm or less, and these holes are connected to the negative pressure supply portion 264. The hose 268 connected to the negative pressure supply unit 264 is connected to the negative pressure supply device 270 via the electromagnetic direction switching valve 274, and the negative pressure supply unit 264 is switched to the negative pressure supply device by switching the electromagnetic direction switching valve 274. 270 is selectively communicated with the atmosphere. The diameter of the hole provided on the holding surface is preferably as small as 0.2 mm or less and 0.1 mm or less from the viewpoint of avoiding the depression of the coating tape 202, but from the viewpoint of cost, it is 0.5 mm or less, 1 mm. The larger the following, the more advantageous. Details of the holding device 204 will be described later.

The negative pressure supply device 270 includes a direction switching valve 274.
It is desirable that the strength of the negative pressure supplied to the can be changed. For example, a device that generates negative pressure by the same principle as an aspirator when compressed air is released into the atmosphere is used as a negative pressure source, and the negative pressure source is capable of adjusting the strength of the generated negative pressure. is there. In this embodiment, two negative pressure supply devices 270 (generally provided with pressure adjustment valves each serving as a pressure adjustment device) are provided between the positive pressure source and the device that generates negative pressure based on the positive pressure. Pressure supply passages are connected in parallel, and are connected to a device that selectively generates a negative pressure by a directional switching valve, so that negative pressures in two stages (generally a plurality of stages) are individually It is possible to supply. If a pressure adjusting valve that can be adjusted automatically is used, it is possible to supply negative pressures of different strengths with one pressure adjusting valve. Further, even if the negative pressure source itself can only supply a negative pressure having a constant strength, at least one negative pressure regulating valve is provided in the pressure supply passage between the negative pressure source and the direction switching valve 274. It is also possible to provide a negative pressure supply device capable of supplying negative pressures of different strengths by providing a pressure supply passage provided with a plurality of negative pressure adjustment valves in parallel and switching the pressure supply passages. .

The feeding device 206 includes a pressing roller 280, and the pressing roller 280 has two narrow widths so that the pressing roller 280 does not contact the center of the coating tape 202 in the width direction as shown in FIG. The rollers 282 are fixed to the hollow rotary shaft 284 so as to be separated from each other, and the hollow rotary shaft 284 is rotatably fitted to the support shaft 285, so that the roller 282 can rotate about its central axis. Has been done. The double-chamfered portion of the support shaft 285 is non-rotatable and relatively moves in the X-axis direction in a long hole 288 formed long in the X-axis direction in a bracket 286 fixed to the main body (not shown) of the coating tape holding and moving device 200. Is operably engaged thereby causing the support shaft 285 to
Is held by a bracket 286 so that it cannot rotate and can approach and separate from the feed roller 290. Further, the support shaft 28
5 is urged in a direction of approaching the support portion 294 by a tension spring 292 as an elastic member which is a kind of urging device, and the slot 288 allows only relative movement in the X-axis direction. Therefore, both widthwise end portions of the coating tape 202 are elastically sandwiched between the pressing roller 280 and the feed roller 290. The support portion 294 is provided on the side surface of the bracket 286 in a position avoiding interference with the feed roller 290 and in parallel with the axis of the support shaft 285.

Flange 29 is provided at both ends of the feed roller 290.
8 is provided, and movement of the coating tape 202 and the pressing roller 280 in the Y-axis direction is restricted. As shown in FIG. 6, the feed roller 290 is rotatable to the bracket 286 via the rotation shaft 296 so that the apex of the roller 290 excluding the flange 298 is the same as or slightly lower than the holding surface 260. Moreover, it is held immovable in both the axial direction and the radial direction. As shown in FIG. 6, a pulley 304 is attached to the output shaft 302 of the roller driving motor 300, which is a step motor, so that the pulley 304 cannot rotate relative to the output shaft 302. The pulley 304 and the rotation shaft 296 of the feed roller 290 cannot rotate relative to each other. A timing belt 308 is wound around the attached pulley 306.
The rotation of the roller driving motor 300 is transmitted to the feed roller 290 by a rotation transmission device including 04 and 306 and a timing belt 308. In this embodiment,
The roller driving motor 300, the pulleys 304 and 306, and the timing belt 308 form the roller rotation driving device 316.
Are configured. Further, the roller rotation driving device 31
6, the pressing roller 280, the feeding roller 290, and the like constitute the feeding device 206.

The holding table 312 of the holding device 204 will be described with reference to FIGS. 6 to 11. The holding table 312 has a coating tape holding and moving device 20 so that its uppermost surface (excluding bolts) has a height substantially the same as or slightly lower than the upper surface of the support wall 52.
It is fixed to the main body of 0 through a bracket (both the main body and the bracket are not shown). An intermediate ventilation plate 324 and an upper ventilation plate 326 are stacked on the support base 322 (see FIGS. 6 and 8), and a pair of guide members 330 are placed on both ends of the upper ventilation plate 326 in the Y-axis direction. (See FIGS. 7 and 8). Fixing holes 336 are provided in the guide member 330, the upper ventilation plate 326, and the intermediate ventilation plate 324. A bolt 340 as a fixing device penetrates these holes 336, and a screw hole 344 provided in the support base 322. The upper ventilation plate 326, the intermediate ventilation plate 324, and the support base 322 are brought into close contact with each other and fixed by being screwed (see FIG. 9). The support base 322, the intermediate ventilation plate 324, the upper ventilation plate 326, the guide member 330, and the like constitute the holding base 312. The negative pressure supply passage 350 shown in FIG. 8 is provided so as to penetrate the support base 322 in the Y-axis direction from the negative pressure supply part 264 on the side surface of the support base 322, and the support on the side opposite to the negative pressure supply part 264 is provided. A negative pressure sensor 354 is provided on the side surface of the table 322 (see FIGS. 7 and 9).

As shown in FIG. 9, a plurality of (three in the illustrated example) grooves 356 are provided in the longitudinal direction on the upper part of the support base 322, and two grooves 3 provided at right angles to the grooves 356.
Both ends of the plurality of grooves 356 are connected by 58. The groove 360 formed thereby and the negative pressure supply passage 350 are connected by a connection passage 370. As shown in FIG. 10, the intermediate ventilation plate 324 is provided with a plurality of slots 374 extending in the width direction and overlapping at right angles on the plurality of grooves 356 of the support 322.
When the intermediate ventilation plate 324 is placed on the support base 322, the slot 374 and the groove 358 do not overlap each other, and the slot 3
The area where 74 is provided is supported by the upper surface of the support base 322. The upper ventilation plate 326 is provided with a large number of holes 376 (circular in this embodiment), and the support base 322.
The negative pressure supplied through the intermediate ventilation plate 324 attracts the coating tape 202 that covers the upper ventilation plate 326.

The present adhesive application device is controlled by the control device 400 shown in FIG. The control device 400 is mainly composed of a computer 402, and
A CPU 404, a ROM 406, a RAM 408, an input port 420 and an output port 422 are connected by a bus line 2. The input port 420 is connected to various detectors and computers such as an image processing computer 428 which analyzes data of an image captured by the reference mark camera 160, a negative pressure sensor 354 and an encoder. The negative pressure supply device 270, the roll driving motor 300, and the Y-axis slide moving motor 42 are connected to the output ports 422 via the driving circuits 440, respectively.
Etc., various actuators are connected. Motor 4
2, 66, 94, 140 are servo motors in this embodiment. The servo motor is a motor capable of controlling the rotation angle with high accuracy, and a step motor may be used instead of the servo motor. These motors 42
Rotational angles such as are representatively shown for the motor 42 are detected by an encoder 450 which is a kind of a rotational angle detecting device. The RAM 408 stores various programs and data such as a main program (not shown), a coating device control program, a deterioration agent discharge program, a coating amount inspection program, a program for coating the printed wiring board 12 with an adhesive, and the like. Remembered.

Next, the operation will be described. In this adhesive application device, deterioration agent discharge and application amount inspection are performed prior to application of the adhesive to the printed wiring board 12. This deterioration agent discharge and coating amount inspection is already known as described in, for example, Japanese Patent Publication No. 5-65229, and will be briefly described.

The discharge of the deterioration agent is caused by deterioration of the adhesive agent, such as the adhesive agent in the vicinity of the discharge nozzle 110 in the syringe 112 or the adhesive agent in the discharge nozzle 110 is cured, or the viscosity of the adhesive agent changes beyond the allowable limit even if it is not cured. If it is, discharge the deteriorated adhesive together with the non-deteriorated adhesive,
This is for ensuring that the ejection is performed normally. The application of the adhesive agent performed at this time is called discarding. The deterioration agent is discharged at a time when the adhesive may be deteriorated, even if it cannot be confirmed whether the adhesive is deteriorated. For example, before the start of a series of application operations of the adhesive to the plurality of printed wiring boards 12, or even after the start of the adhesive application operation, after the application is stopped for a set time or more.

In the application amount inspection, for example, the application is performed under the same conditions as the application of the adhesive to the printed wiring board 12, the application amount of the adhesive is measured, and the application is performed in a normal state. The ejection conditions are adjusted. The application of the adhesive agent performed at this time is referred to as trial striking. The trial striking is performed at a preset time, for example, for each printed wiring board, or for each set number. Also, it is often done with abandonment.

The deterioration agent discharge and the coating amount inspection are performed for each of the three coating heads 16A, 16B and 16C. When discharging the deterioration agent and inspecting the coating amount, the coating tape holding / moving device 200 by moving the Y-axis slide 40.
Of the coating heads 16A, 16B and 16C in the Y-axis direction and the movement of the coating heads 16A, 16B and 16C in the X-axis direction by the head moving device 84 to move the coating heads 16A, 16B and 16C to respective coating positions on the coating tape 202. To be In that state, the Z-axis slide 90 is moved by the Z-axis slide moving device 92.
Of the coating heads 16A, 16A
B and 16C are respectively lowered, and a throwing shot and a trial shot are performed.

The discharge of the deterioration agent and the inspection of the coating amount in the coating head 16A will be described representatively. For example, when the suspended state of the adhesive coating operation continues for a set time or longer and then the coating operation is restarted, first, the deterioration agent is discharged and then the coating agent is applied before the coating operation is restarted. Quantity inspection is performed. When the degrading agent is discharged, a predetermined number of times of discarding is performed on the surface of the coating tape 202 (8 times in this embodiment). For discarding and trial striking, apply tape 20
As shown in FIG. 13, the two surfaces are horizontally supported by the holding surface 260 of the holding table 312 and do not come into contact with the pressing roller 280 when the coating tape 202 is fed in the suction area 480 to be sucked. It is desirable to be performed in the coatable area 482 which is an area. In the present embodiment, the coating area 48, which is the half of the coating-applicable area 482 on the side closer to the feeding device, is the coating area 48 where the discarding and the trial-printing are performed.
4 is done.

In this embodiment, at the time of discarding, the coating head 16A and the coating tape holding and moving device 200 are moved relative to each other in accordance with the deterioration agent discharge program, and the adhesive is sequentially applied to a plurality of coating positions set in the coating area 484. Is applied. In the coating area 484, if a plurality of coating positions where discarding is performed are set in one row parallel to the X-axis direction, the coating head 16A is moved in the X-axis direction and discarding is performed. , If there are multiple sets in each of the X-axis direction and the Y-axis direction, one column in the Y-axis direction is discarded, then the column is changed, and the adjacent column in the X-axis direction is discarded. Hitting is done. The coating tape holding / moving device 200 is moved in the Y-axis direction each time the coating tape 2 is coated.
02 is applied to a coating position adjacent in the Y-axis direction with respect to the position on which the coating is applied, and is parallel to the Y-axis direction.
After the coating is applied to the row, the coating head 16A is moved in the X-axis direction, and the coating is performed on the adjacent row in the X-axis direction. In the present embodiment, 8 times of discarding is performed in discharging the deterioration agent once, application is performed 4 times in one row parallel to the Y-axis direction, and adjacent rows on the roll tape 220 side in the X-axis direction are performed. Is applied four more times.

When the discarding is performed a set number of times and the deterioration agent discharge is completed, the application amount inspection is performed by the application amount inspection program. In the trial ejection for the coating amount inspection, the coating head 16A and the coating tape holding / moving device 2
00, relative movement to the coating position, application of the adhesive by the coating head 16A, relative movement of the X-axis slide 64 and the coating tape holding and moving device 200 to the reference mark camera 160 relative to the imaging position, And the image of the applied adhesive is picked up a set number of times (4 times in the present embodiment). Each time the test shot is performed once and the adhesive is applied to the application area 484, the reference mark camera 160 is moved above the applied adhesive by the movement of the X-axis slide 64, and the applied adhesive is applied. Image. In the present embodiment, the coating surface of the coating tape 202 is white, the difference in brightness between the adhesive colored in red is large, and an image with a large contrast is obtained between the adhesive and the coating surface. The image can be obtained accurately.

When the trial ejection is performed a set number of times, the ejection state of the adhesive, for example, the ejection amount is detected based on the image data of the plurality of adhesives obtained by the image pickup. The ejection amount is acquired, for example, by the outer surface area of the applied adhesive in a plan view, and the average ejection amount, which is the average value of the ejection amounts of the adhesive by a plurality of trial shots, is obtained. The average discharge amount is compared with the threshold upper limit discharge amount and the threshold lower limit threshold discharge amount, and if the average discharge amount exceeds the threshold upper limit discharge amount or the threshold lower limit discharge amount is exceeded. If it is less than the amount, the coating condition is corrected so that the corrected discharge amount is an intermediate value between the threshold upper limit discharge amount and the threshold lower limit discharge amount. For example, the supply time of the pressurized air to the syringe 112 is corrected. Although detailed description is omitted, the displacement of the discharge pipe 116 is obtained based on the images of the plurality of adhesives that have been trial-printed, and the displacement may be corrected when the adhesive is applied to the printed wiring board 12. Good.

Next, the coating tape 2 by the holding device 204
The adsorption of 02 will be described. The electromagnetic directional control valve 274 is turned on before the adhesive application device is activated and the deterioration agent is discharged and the application amount is inspected, and a negative pressure is supplied from the negative pressure supply device 270 to the negative pressure supply unit 264. The supplied negative pressure passes through the negative pressure supply passage 350 and the connection passage 370, and then passes through the groove 3
Then, the negative pressure is supplied to the holes 376 of the upper ventilation plate 326 through the plurality of slots 374 so that the negative pressure becomes more uniform. As a result, the coating tape 202 on the upper ventilation plate 326 is adsorbed to the holding surface 260 with a generally uniform adsorption force in the adsorption area 480.

When the deterioration agent is discharged and the coating amount is inspected, the first negative pressure generated based on the positive pressure that has passed through the first pressure regulating valve is supplied to the negative pressure supply section 264, and the coating tape 202. Is strongly adsorbed within a range in which no substantial deformation (deformation that substantially affects the preliminary shot) occurs in the adsorption area 480. The second negative pressure supplied during tape feeding is adjusted to be weaker than the first negative pressure by the second pressure regulating valve, the suction force is weakened, and the coating tape 202 is fed by the coating tape moving device 206. At this time, the movement of the coating tape 202 is allowed while maintaining an appropriate resistance. The second negative pressure is supplied to the negative pressure supply unit 264 while the deterioration agent discharge and the coating amount inspection are not performed. The adjustment of the first negative pressure and the second negative pressure by the first and second pressure adjusting valves does not have to be performed frequently, and for example, once the adjustment is made, it may be checked once a month.

The feeding of the coating tape 202 will be described. In the deterioration agent discharge and coating amount inspection, the coating tape 20
When there is no coatable space in the second coating area 484, after the negative pressure supplied to the suction area 480 is weakened,
The coating tape 2 is moved by the coating tape moving device 206 so that the new surface of the coating tape 202 is positioned in the coating area 484.
02 is sent. That is, a signal is output from the output port 422 to the drive circuit 440, and the drive circuit 440 switches the direction switching valve of the positive pressure source of the negative pressure supply device 270, so that the negative pressure supplied to the negative pressure supply unit 264 is reduced. The first negative pressure is switched to the second negative pressure. Negative pressure sensor 35
4, when a decrease in the negative pressure in the negative pressure supply passage 350 is detected, a drive signal is output from the output port 422 to the drive circuit 440, and a set amount of drive power pulse is supplied to the roll drive motor 300 to output the output shaft. 302 rotates, the rotation is transmitted to the feed roller 290 by the roller rotation transmission device, and the feed roller 290 is rotated. When the feed roller 290 is rotated in the direction in which the upper portion thereof is separated from the holding base 312 (clockwise in FIG. 6), the pressing roller 280 is rotated in the opposite direction, and the coating tape 202 sandwiched between these two rollers is removed. It is pulled out from the holding table 312 and stored in the storage box 314. The used coating tape 202 can be reused if the adhesive is removed by washing or the like, but it may be disposable.

When the coating tape 202 is fed, the drive power pulse is output by the amount corresponding to the rotation angle of the roll driving motor 300 corresponding to the set moving distance of the coating tape 202, and the coating tape 202 is coated. The tape 202 is fed by the set amount. When the output of the driving power pulse is turned off and the feeding of the coating tape 202 is stopped, the negative pressure supplied to the negative pressure supply unit 264 is switched to the first negative pressure. When the coating tape 202 is fed, the roll tape 220 is rotated while receiving resistance due to friction between the hollow shaft portion 226 and the fixed shaft 232. Then, the inertial rotation of the roll tape 220 when the tape feeding is stopped is hindered by the resistance, and the rotational movement of the roll tape 220 is stopped in a short time.

[Embodiment: Porous Plate Type] In the above embodiment, a perforated plate was used as the upper ventilation plate 326.
Instead, a porous plate made of stainless steel is used in this embodiment. The embodiment will be described based on FIG. In addition, the same reference numerals are given to the constituent elements that perform the same operations as the constituent elements of the above-described embodiment to show the correspondence relationship,
The description is omitted.

As shown in FIG. 14, in the holding base 312, a porous plate 514 is superposed on a support base 510, and a pair of guide members 33 are provided at both ends of the porous plate 514 in the Y-axis direction.
0 is placed. The guide member 330 and the porous plate 514 are fixed to the support base 510 with bolts 340. As shown in FIG. 15, lattice-shaped grooves 520 are provided on the upper surface of the support base 510, and the grooves 520 are provided.
The negative pressure supply passage 350 and the negative pressure supply passage 350 are connected by a connection passage 370. The porous plate 514 is a commercially available stainless steel porous plate, has a large number of voids inside, these voids are connected to each other, and a large number of thin fluid passages are three-dimensionally formed. The front surface (upper surface in FIG. 8) and the back surface (lower surface in FIG. 8) of the porous plate 514 are connected to each other by the fluid passage. In the present embodiment, the porous plate 514 has a fluid passage having a three-dimensional expansion, but the fluid passage may be formed in a direction close to the vertical direction of the porous plate 514. In that case,
Increasing the number of grids of the grooves 520 on the support base 510, and the support base 322 and the intermediate ventilation plate 3 used in the above embodiment.
It is desirable to provide 24 and.

The porous plate used for the porous plate 514 is
As mentioned above, porous metal may be used, or porous carbon,
It may be porous ceramics, porous resin, or the like. As the porous metal or porous carbon, for example, those commercially available for hydrostatic air bearings can be used. Further, as the porous metal, for example, in addition to stainless steel, a porous material containing a metal as a main component such as aluminum alloy, titanium and nickel can be used. The average pore diameter of the porous plate 514 is 50 μm to 100 μm in this embodiment.
m, but the pore size of 10 μm to 50 μm having a small pore size may be used to further homogenize the adsorption force. In some cases, it may be 100% so as to reduce the ventilation resistance.
You may use the thing with large pore diameter (micrometer-300 micrometers).

A reel box 530 as a coating tape supply device for accommodating the roll tape 220 is provided in the main body of the device (not shown), and the bottom surface 534 of the reel box 530 is inclined so that the side close to the holding table 312 becomes higher. ing. Also, the side wall 538 of the reel box 530
An appropriate clearance is provided between the side wall portion 228 of the reel 224 housed in the reel box 530.

The operation is almost the same as that of the above-mentioned embodiment including the discharge of the deterioration agent and the inspection of the coating amount, and the different points will be described. First, the supply of negative pressure to the holding surface 260 will be described. When the electromagnetic directional control valve 274 is turned on, a negative pressure is supplied from the negative pressure supply device 270 to the negative pressure supply unit 264, and the negative pressure is passed through the negative pressure supply passage 350 and the connection passage 370 on the support base 510. It is supplied to the groove 520. Negative pressure is supplied to the grooves 520 on the porous plate 514 on the support base 510, but the voids inside the porous plate 514 are 3
Negative pressure is supplied to the upper surface of the porous plate 514 which is dimensionally connected and is larger in area than the groove 520.

During tape feeding, the roll tape 22
0 is rotated to the holding table 204 side against the inclination of the bottom surface 534, and after contacting the side wall 542, the reel 224 is moved.
It is rotated while receiving the frictional resistance between the side wall 542 and the like. When the tape feeding stops, the roll tape 220
Stops near the side wall 542, but in that state, the roll tape 220 is moved to the side wall 542 by the inclination of the bottom surface 534.
And receives a force in the opposite direction to the coating tape 202.
Is pulled in the opposite direction to the holding table 312, and a back tension action occurs. Electromagnetic directional control valve 27 during tape feeding
4 is turned off, and the supply of negative pressure to the negative pressure supply unit 264 is stopped. This is because the reel box 540, which is the coating tape supply device in this embodiment, has a structure in which the back tension is applied to the coating tape 202 as described above, and the coating tape 202 is hardly loosened during tape feeding. In the case of the present embodiment, the application tape 202 can be sucked and fed even if the second negative pressure is not supplied from the negative pressure supply device 270.

[Supplement] Unless otherwise specified, the following description is applicable to the above two embodiments.

In the above-mentioned perforated plate type, the upper ventilation plate 326 is provided with a large number of circular holes, but the holes are not limited to circular shapes and may be polygonal or elongated holes (or slits). When making the shape of the hole oblong, considering the friction between the upper ventilation plate having the oblong hole and the coating tape 202, the longitudinal direction of the oblong hole is parallel or oblique to the traveling direction of the coating tape 202. It is desirable to be done. The diameter of the hole and the width of the long hole are preferably 0.3 to 1 mm. Further, holes may be uniformly provided in the upper ventilation plate 326,
There may be places with many holes and places with few holes. For example, the number of holes per unit area may be increased in the peripheral portion of the area where the coating tape 202 is sucked, and the number of holes per unit area may be reduced in the central portion. By changing the shapes and numbers of the holes, passages, grooves, etc. of the upper ventilation plate, the intermediate ventilation plate and the support base, and combining them, the suction force of the coating tape 202 can be partially increased or the coating tape 202 The suction force of 202 can be made uniform in the suction area 480.

The holding table 312 may be provided with a plurality of ventilation plates or may be provided with a single ventilation plate. In the case of the holding base 312 including a plurality of ventilation plates, the intermediate ventilation plate can supply a negative pressure as uniform as possible to the upper ventilation plate, and the shape of the ventilation hole is not limited as long as the upper ventilation plate can be supported. The porous plate 514 of the porous plate type embodiment is considered to be a kind of ventilation plate. The upper ventilation plate, the intermediate ventilation plate, the porous plate, and the support bases 322 and 520 function as pressure diffusion plates that diffuse and transmit the supplied negative pressure, and support plates that support the ventilation plate and the coating tape 202 on the upper side. It also functions as a pressure diffusion support plate.
If the strength of the upper ventilation plate is high, the adsorption area 48 on the support surface
It is also possible to use a pressure diffusion plate in which the range corresponding to 0 is a cavity.

The discarding and the trial hitting have been performed in the coating area 484, but they may be performed in the coatable area 482.

The coating tape 202 is not limited to the reel 224 and may be wound around a rotatable shaft. Coating tape 20
The surface roughness of No. 2 preferably has a reference length of 0.8 mm and a maximum height of 6.3 μm or less. Further, the reference length is 0.8 mm and the maximum height is 3.2 μm, 1.6 μm, and the reference length is 0.25 mm and the maximum height is 0.8 μm, 0.4.
It is more desirable that it is as small as μm or less.

Although the roller driving motor 300 is a step motor, it may be an electric motor having a precise rotation angle, and may be a servo motor or the like. Also, a normal electric motor such as a DC motor or an AC motor may be used. The motor is operated for the set time, and the coating tape 202 is moved by the set length. If an encoder is provided on any of the above motors so that the rotation angle can be monitored, the feed amount can be accurately controlled.

In each of the above-mentioned embodiments, the adhesive applying device is a device for discharging the adhesive contained in the syringe from the discharge nozzle by supplying pressurized air. However, in addition to this, for example, a high viscous fluid applying device is used. Although not disclosed yet, as described in the specification of Japanese Patent Application No. 2001-1983 relating to the present applicant, a device that discharges a high-viscosity fluid from a discharge nozzle by a pump including a screw may be used.

The high-viscosity fluid applying device may apply the high-viscosity fluid not only in the spot shape but also in other shapes such as linear shape. In that case, the discarding may be performed in spots, and the trial may be performed in strips, or both may be performed in strips.

Although some embodiments of the present invention have been described in detail above, these are merely examples, and the present invention is described in the above-mentioned [Problems to be solved by the invention, means for solving problems and effects]. Various modifications and improvements can be performed based on the knowledge of those skilled in the art, including the described embodiments.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing an adhesive application device including an application tape holding and moving device according to an embodiment of the present invention.

FIG. 2 is a front view schematically showing the adhesive application device.

FIG. 3 is a front view showing an adhesive application unit of the adhesive application device.

FIG. 4 is a side view showing the adhesive application unit.

FIG. 5 is a side sectional view showing an application head provided in the adhesive application unit.

FIG. 6 is a front view schematically showing the coating tape holding and moving device.

FIG. 7 is a plan view schematically showing the coating tape holding and moving device.

FIG. 8 is a front sectional view schematically showing a holding table of the coating tape holding and moving device.

FIG. 9 is a plan view schematically showing a support base of the holding base.

FIG. 10 is a plan view schematically showing an intermediate ventilation plate of the holding table.

FIG. 11 is a plan view schematically showing an upper ventilation plate of the holding table.

FIG. 12 is a block diagram schematically showing a control device of the adhesive application device.

FIG. 13 is a plan view schematically showing a coatable area and the like on the holding surface of the coating tape holding and moving device.

FIG. 14 is a front view schematically showing a coating tape holding and moving device which is another embodiment of the present invention.

FIG. 15 is a front view schematically showing a support base of a coating tape holding and moving device which is another embodiment of the present invention.

[Explanation of symbols]

12: Printed wiring board 16A, 16B, 16C: Application head 18: Adhesive application unit 52: Support wall 200: Application tape holding and moving device 202: Application tape 204: Holding device 260:
Holding surface 264: Negative pressure supply unit 270: Negative pressure supply device 274: Electromagnetic directional control valve 280: Press roller 290: Feed roller 298: Flange 3
12: Holding stand 316: Roller rotation drive device 322: Support stand 3
24: Intermediate ventilation plate 326: Upper ventilation plate 330: Guide member 35
0: Negative pressure supply passage 360: Groove 374: Slot 376: Hole 480: Adsorption area 482: Application area 484: Application area

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4F041 AA05 AB01 BA04 BA23 BA34                 4F042 AA06 AB00 CB03 CB10 CB11                       DD45 DF09                 5E319 BB05 BB11 CD25 GG20

Claims (4)

[Claims] 1. A high-viscosity fluid coating device for discharging a high-viscosity fluid from a discharge nozzle to apply it to an object to be coated, wherein a coating tape having a longitudinal shape different from that of the object to be coated is formed in a longitudinal direction thereof. And a holding table that has a flat upper surface and holds a part of the coating tape fed by the feeding device by negative pressure and holds it on the upper surface. Fluid application device. 2. A plurality of holes are provided on the surface of the holding table,
The high-viscosity fluid application device according to claim 1, further comprising a negative pressure supply device that supplies a negative pressure to the holes via a pressure supply passage. 3. The highly viscous fluid according to claim 1, wherein at least the surface of the holding table is made of a porous material, and a negative pressure supply device for supplying a negative pressure to the porous portion via a pressure supply passage is included. Coating device. 4. The high viscosity fluid application device according to claim 2, wherein the negative pressure supply device is capable of supplying a plurality of negative pressures having different strengths.