JPH06105642B2 - Paint coating device for strip-shaped substrate electrodes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when manufacturing a rectangular chip electronic component such as a rectangular chip fixed resistor, forms a coating film to be an electrode on both long side edges of a rectangular substrate with a ceramic split groove. The present invention relates to a coating material coating device for electrodes.

[0002]

2. Description of the Related Art As an example, the manufacturing sequence of a rectangular chip fixed resistor will be described. The ceramic substrate 1 shown in FIG. 5 (a) is divided into vertical and horizontal latticed grooves 2, 3 beforehand.
(The interval of the dividing groove 2 is wider than the interval of the dividing groove 3) is formed,
It is divided into hundreds of rectangular elements 4 and fired, a resistance paste is applied to one surface on the side of the split grooves 2 and 3, trimming, application of surface protective paint and marking are performed. This ceramic substrate 1 with split grooves is divided along the split grooves 2 to form strip-shaped substrates 5 with split grooves, as shown in FIG. As shown in FIG. 5C, the front surface, the back surface, and the end surface of the edge portion are coated with silver paint 6 for an electrode and dried. After that, the strip substrate 5
Is divided along the dividing groove 3 into each element 4 as shown in FIG.

Conventionally, the strip-shaped substrate 5 shown in FIG. 5 (b) has a front surface, a back surface, and an end surface at both long side edges, as shown in FIG. 5 (c).
As shown in FIG. 2, a printing method and a plating method are generally used to form a coating film of the silver paint 6 for electrodes.

[0004]

However, the above-mentioned conventional printing method and plating method have problems that the coating film of the silver paint 6 is thin and the reliability is poor, and that it takes time to form the coating film. It was

The present invention solves the above-mentioned conventional problems, and the electrode coating material can be applied thickly, reliably, and easily to the long side edges of both sides of the strip substrate. Therefore, it is an object of the present invention to provide a coating material coating device for an electrode of a strip-shaped substrate, which is capable of improving the reliability and the coating work efficiency.

[0006]

Means for Solving the Problems The technical means of the present invention for achieving the above-mentioned object is to provide a coating groove formed to have a width wider than the thickness of a strip-shaped substrate conveyed by an intermittent conveying device. And a pair of coating rotors that are rotatably supported so as to be movable in the axial direction, and a paint reservoir in which the coating material for the electrode is scooped by the coating grooves as the coating rotors rotate. And intermittently rotating and axially moving both of the coating rotary bodies, and simultaneously fitting the coating grooves for scooping the electrode coating material to the long side edges on both sides of the strip-shaped substrate conveyed. The strip-shaped substrate is provided with a drive device for applying the electrode coating material to the long side edges on both sides of the strip-shaped substrate.

Another technical means of the present invention for achieving the above-mentioned object has a coating groove formed in a width wider than the wall thickness of the strip-shaped substrate conveyed by the intermittent conveying device, facing each other.
A pair of coating rotors that are rotatably and movably supported in the axial direction, and with the rotation of these coating rotors,
The coating groove for scooping the electrode coating material by the coating groove and the coating material for the electrode coating material are conveyed by intermittently rotating and axially moving the coating material for the electrodes. The strip-shaped substrate is provided with a drive device for applying the electrode coating material to the long-side edge portions on both sides of the strip-shaped substrate by sequentially fitting and detaching the long-side edge portions of the strip-shaped substrate.

Still another technical means of the present invention for attaining the above object is, in each of the above technical means, scoops coating material for electrodes in a coating material reservoir by a coating groove as the coating rotator rotates. After that, a scraper for removing the electrode coating material adhering to the surface of the coating rotator is provided.

The coating rotator in each of the above technical means has a coating groove on the outwardly projecting portion, and upon intermittent rotation,
It is preferable that the portion other than the protruding portion is formed in a shape that allows passage of the strip-shaped substrate that is intermittently conveyed.

[0010]

According to the present invention configured as described above, the electrode device coating material in the coating material reservoir is applied to the coating groove by the intermittent rotation and the axial movement of the pair of coating rotary members by the driving device. Scooping, the coating groove containing the electrode coating material is simultaneously or sequentially fitted to the long side edge portions on both sides of the strip-shaped substrate conveyed by the intermittent conveying device, and then separated. In this way, by fitting the application groove holding the electrode coating material to the long side edge portion of the strip-shaped substrate and separating the electrode substrate, the electrode coating material can be applied to both long side edge portions of the strip substrate. Then, by setting the coating groove to a desired depth and width, it is possible to apply the electrode coating material to both long side edges of the strip substrate with a desired width and thickness. Further, the electrode coating material can be applied to both long side edges of the strip-shaped substrate by a simple operation of intermittent rotation of the application rotator and axial movement.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. 1 to 3 show a strip-shaped substrate electrode coating material application apparatus according to a first embodiment of the present invention. FIG. 1 is an overall perspective view, FIG. 2 is a partially enlarged perspective view, and FIG. 3 is a partially enlarged view. It is a front view.

As shown in FIG. 1, a dividing device (not shown) in the previous process and a drying device (not shown) in the subsequent process are connected by a pair of parallel transfer chains 11. The pair of transfer chains 11 are connected by a connecting shaft 12 and the like, and chucks 13 are attached at desired intervals. In each chuck 13, a fixed chuck member 14 is attached to one transfer chain 11, a support base 15 is attached to the other transfer chain 11, and the movable chuck member 1 is attached to the support base 15.
The movable chuck member 16 is urged toward the fixed chuck member 14 by a compression spring 18 which is interposed between the movable chuck member 16 and the spring receiver 17 of the support 15. Then, the movable chuck member 16 is moved toward the side separated from the fixed chuck member 14 against the elasticity of the compression spring 18 by the control portion 19 of the movable chuck member 16 being pressed toward the spring receiver 17 side of the support base 15. Each transfer chain 11 is endlessly hung on a sprocket (not shown), and is supported so that the transfer side can travel horizontally along the rail 20. Any one of the sprockets is linked to a stepping motor (not shown), and the transport chains 11 are intermittently moved by intermittent rotation of the sprockets driven by the stepping motor.

The strip substrate 5 with the ceramic split groove divided by the dividing device retreats against the elasticity of the fixed chuck member 14 and the compression spring 18 which is pressed backward by the controller 19 as described above. When the movable chuck member 16 is supplied to the movable chuck member 16, the control portion 19 of the movable chuck member 16 is released and the movable chuck member 16 is advanced by the repulsion elasticity of the compression spring 18, so that both short side edges of the strip-shaped substrate 5 are moved. Fixed chuck member 1
4 and the movable chuck member 16 are sandwiched in a fixed state.
Then, as the transfer chain 11 intermittently travels on the rails 20 as described above, the strip-shaped substrate 5 is intermittently transferred on substantially the same horizontal plane as indicated by a chain line.

The electrode coating material coating device 21 of the present invention is provided while the strip-shaped substrate 5 is intermittently conveyed. Explaining in detail, a horizontal rotation shaft 23 is rotatably supported by a frame 22 via a bearing 24. Inside the pedestal 22, a pair of plate-shaped coating rotary bodies 25 and 26 and moving wheels 27 and 28 outside thereof are provided on the rotary shaft 23. Rotating body for each coating 2
Reference numerals 5 and 26 are formed in such a shape that outward projections are integrally projected at positions where the phases are shifted by 180 degrees on the disc, and coating grooves 29 are formed on the respective projections by the coating rotary members 25 and 26. They are formed so as to face each other (see FIGS. 2 and 3). Each coating groove 2
9 is formed so that the width in the vertical direction is wider than the thickness of the strip-shaped substrate 5, and can be fitted to each long side edge portion of the strip-shaped substrate 5 with a margin, and the strip-shaped substrate 9 will be described later. When the silver paint 6 to be an electrode is applied to the long side edge portion of the electrode 5, the depth and width are set so that the silver paint 6 can be applied in a desired thickness. Further, since the arc-shaped portions between the coating grooves 29 on both sides of the rotators for coating 25 and 26 are located at the upper portion, the coating rotators 25 and 26 do not escape from the strip-shaped substrate 5 to prevent the intermittent conveyance and prevent the passage of the strip-shaped substrate 5. I can forgive. Wheel for movement 2
7, 28 have a groove 30 in the center of the outer circumference. The coating rotator 25 and the moving wheel 27 are supported by a key 31 so as to be rotatable integrally with the rotary shaft 23 and axially movable while being coupled to each other, and the coating rotator 26 and the moving wheel 28. Are also connected to each other by a key (not shown) so as to be rotatable integrally with the rotary shaft 23 and movable in the axial direction. Therefore, the moving wheel 27, the coating rotating body 25, and the moving wheel 28.
Further, the rotating body for coating 26 can be close to or separated from each other.

A paint reservoir 32 is installed at the inner bottom of the pedestal 22, and the paint reservoir 32 contains the silver paint 6 serving as an electrode. Then, with the intermittent rotation of the coating rotors 25, 26, etc., the protrusions thereof are alternately inserted into the lower silver paint 6, and the coating grooves 29 of the protrusions scooping the silver paint 6 are alternately raised to the upper part. It is designed to be stopped while it is in position.

The pedestal 22 has a pair of plate-shaped scrapers 3
3, 34 bases are attached. Each scraper 3
3, 34 are bifurcated at the tip end side thereof, and are intermittently rotated at the positions where the coating rotary bodies 25, 26 are separated from each other, and after scooping the silver coating 6 in the coating groove 29 as described above, the coating rotary body The silver paint 6 adhering to the surfaces of 25 and 26 can be scraped off and the silver paint 6 can be left only in the coating groove 29. And each scraper 33, 3
No. 4 does not interfere with the arcuate portions of the coating rotors 25 and 26, and is arranged so as not to prevent the coating rotors 25 and 26 from moving in the axial direction.

The mount 22 has a rotary shaft 3 parallel to the rotary shaft 23.
5 is rotatably supported via a bearing 36. On the rotary shaft 35, inside the gantry 22, a pair of groove cams 3
7, 38 are attached. A pair of columns 39 and 40 are erected on the gantry 22, and the bases of the arms 41 and 42 are supported on the upper ends of the columns 39 and 40 by a fulcrum 43 so as to be rotatable in the horizontal direction. Rollers 43 and 44 are rotatably supported around the vertical axis at the tip and the middle of the arm 41, and rollers 45 and 46 are rotatably supported around the vertical axis at the tip and the middle of the arm 42. The rollers 43 and 44 are engaged with the groove 30 of the moving wheel 27 and the groove 47 of the groove cam 37, and the rollers 45 and 46 are moved to the groove 30 of the moving wheel 28.
Is engaged with the groove 47 of the groove cam 38. Then, as the groove cams 37, 38 rotate, the arms 41, 42 rotate via the rollers 44, 46 so that their distal ends are slightly closer to or slightly apart from each other, and the rollers 43,
A moving wheel 28 and a coating rotator 2 via 45
5 and the moving wheel 29 and the coating rotator 26 are set so as to be moved in the axial direction so as to approach or separate from each other.

Timing wheels 48 and 49 are mounted on the outward protruding ends of the rotary shafts 23 and 35, respectively.
A timing belt 50 is wound around the timing wheel 48 and a timing wheel (both not shown) linked to the output shaft of the stepping motor. A timing belt 51 is wound around the timing wheel 49 and a timing wheel (both not shown) linked to the motor. Therefore, the timing wheel 4 is driven through the timing belt 50 by driving the stepping motor.
8, the rotary shaft 23, the moving wheels 27 and 28, the coating rotors 25 and 26 are intermittently rotated, and the timing wheel 49 is driven by the motor through the timing belt 51.
The rotary shaft 35 and the groove cams 37 and 38 are rotated. And
The moving wheel 27 and the coating rotator 25, the moving wheel 28, the coating rotator 26, and the like stop intermittent rotation during that time, and the coating grooves 29 of the coating rotators 25 and 26 are located at the upper and lower portions of the scraper. It is set so as to be moved in the axial direction by the rotation of the arms 41, 42 accompanying the rotation of the groove cams 37, 38 as described above at a position where it does not interfere with 33, 34. The intermittent transfer of the strip-shaped substrate 5 by the transfer chain 11 and the like, and the coating rotary members 25, 2
The timing of intermittent rotation and axial movement of 6th grade will be clarified in the following operation description.

The operation of the above arrangement will be described below. As described above, the transport chain 11, the chuck 13 and the like are intermittently run to intermittently rotate the rotary shaft 23, the coating rotary bodies 25 and 26, and the rotary shaft 35 and the groove cams 37 and 38 are rotated. .

When the strip-shaped substrate 5 divided by the dividing device is supplied between the fixed chuck member 14 and the movable chuck member 16 which is retracted against the elasticity of the compression spring 18, the movable chuck member 16 is moved. The control portion 19 is released and the compression spring 18 moves forward due to the repulsive elasticity of the compression substrate 18 so that both short edges of the strip substrate 5 are fixedly held by the fixed chuck member 14 and the movable chuck member 16. In this way, along with the intermittent running of the transfer chain 11, the chuck 13 and the like, the two short side edge portions of the strip-shaped substrate 5 are sequentially sandwiched by the chucks 13 and intermittently transported.

On the other hand, in the electrode paint coating device 21, first, the distal ends of the arms 41 and 42 are separated from each other,
The rotating shaft 23, the moving wheels 27 and 28, the coating rotor 2 in a state where the coating rotors 25 and 26 are separated from each other.
5, 26, etc. rotate intermittently. Along with this, first, the silver coating material 6 in the coating material reservoir 32 is scooped by the coating groove 29 of the coating rotary members 25 and 26. Subsequently, the coating groove 29 side of the coating rotors 25 and 26 scooping the silver coating 6 moves above the coating reservoir 32,
Silver paint 6 attached to the surfaces of the coating rotors 25 and 26 while passing through the inside of the forked portions of the scrapers 33 and 34.
Is scraped off by scrapers 33 and 34, and the silver paint 6 is left only in the coating groove 29. Then, the coating rotor 2
While the arcuate portions 5 and 26 are located on the upper side and the lower side, the strip-shaped substrate 5 intermittently conveyed as described above passes through the coating rotary body 26 and passes through the coating rotary bodies 25 and 26. It is carried in between. Subsequently, the coating rotors 25 and 26 face each other so that the coating groove 29 holding the silver coating 6 moves upward and the strip substrate 5 that has been carried in and stopped is sandwiched by the long side edges thereof. The coating groove 29 located at the other lower part is inserted into the silver paint 6 in the paint reservoir 32 (see FIG. 2). When the rotation of the coating rotary bodies 25 and 26 is stopped in this state, the arms 41 and 42 are rotated so that the tip ends thereof approach each other by the rotation of the groove cams 37 and 38 as described above. Along with this, as described above, the moving wheel 27 and the coating rotator 25 and the moving wheel 28 and the coating rotator 26 approach each other in the axial direction in the rotation stopped state, and as shown in FIG. Silver paint 6
The coating grooves 29 holding the are simultaneously fitted to both long side edges of the strip substrate 5. At this time, the coating groove 29 may be fitted such that its back wall abuts on the end face of the strip substrate 5, or may be fitted so as to have a gap between the back wall and the end face of the strip substrate 5.

After that, as described above, the groove cams 37 and 38 rotate so that the distal ends of the arms 41 and 42 rotate in the direction in which the arms 41 and 42 are separated from each other.
Also, the coating rotor 25, the moving wheel 28, and the coating rotor 26 move in the axially separated direction in the rotation stop state, and the coating grooves 2 of the coating rotors 25 and 26 are moved.
9 is removed simultaneously from both long side edges of the strip substrate 5. As a result, the silver paint 6 can be applied to the front surface, the back surface, and the end surfaces of the long side edges of the strip-shaped substrate 5 so as to have a substantially uniform thickness. At this detached position, the rotary shaft 23, the moving wheels 27, 28, the coating rotors 25, 26, etc. rotate intermittently, and the coated coating groove 29 located at the upper portion moves downward, and the silver coating material at the lower portion. Coating groove 2 located in 6
9 picks up the silver paint 6 and begins to move upwards. Then, when the arc-shaped portions of the coating rotary members 25 and 26 are located at the upper portion,
The transport chain 11, the chuck 13 and the like intermittently travel, the coated strip-shaped substrate 5 is carried out through the coating rotating body 25, and the next strip-shaped substrate 5 is transferred to the coating rotating bodies 25 and 26. It is carried in between.

Thereafter, by repeating the above operation, the silver coating material 6 is sequentially applied to the long side edges on both sides of the strip-shaped substrate 5 which is divided and intermittently conveyed, and the drying process is intermittently performed. Transport.

As a result of the test, the coating groove 29 holding the silver coating 6 was fitted on the long side edge portion of the strip-shaped substrate 5 and then removed to remove the surface of the long side edge portion of the strip-shaped substrate 5, It was confirmed that the silver paint 6 could be applied to the back surface and the end surface with a substantially uniform thickness and smoothly.

Next, a second embodiment of the present invention will be described. FIG. 4 is a partially enlarged front view showing a coating material coating device for electrodes in a second embodiment of the present invention.

The feature of this embodiment is that, as shown in FIG. 4, first, the coating groove 29 for holding the silver coating 6 in one of the coating rotary members 25 is formed on the long side of one side of the strip-shaped substrate 5. Then, the coating groove 29 for holding the silver paint 6 in the other coating rotary member 26 is fitted in the long side edge portion on the other side of the strip-shaped substrate 5, and even when detached, first, The coating groove 29 of the coating rotator 25 is separated from the long side edge portion on one side of the strip substrate 5, and then the coating groove 29 of the other coating rotator 26 is formed on the other side of the strip substrate 5. The coating groove 29 of the coating rotary body 25 is separated from the peripheral edge portion before the coating groove 29 of the coating rotary body 26 is fitted into the long side edge portion of the strip substrate 5 on the other side. May be removed from the grooved cam 3 so that the silver coating 6 is applied to both long side edges of the strip-shaped substrate 5.
The feature is that the shapes of 7, 38 and the like are set. Since other configurations are similar to those of the first embodiment,
The description is omitted.

For transporting the strip-shaped substrate 5, various configurations can be used in place of the transport chain 11 and the chuck 13. For example, a disc may be used, and a large number of chucks may be radially provided on the outer periphery of the disc.
Alternatively, a plurality of pairs of chucks may be attached to the transfer chain 11 for each block. By using such a transfer method, the interval between the strip-shaped substrates 5 can be narrowed and the drying furnace can be shortened. . Further, the coating grooves 29 of the coating rotors 25 and 26 are not limited to two locations, but may be one location, and if the coating rotors 25 and 26 are made large, they can be provided at three or more locations. Further, the coating rotors 25 and 26 are moved in the axial direction while being rotated, and the coating rotors 29 holding the silver paint 6 are close to the long side edge of the strip substrate 5 and face each other. , 26
May be stopped and further moved in the axial direction so that the coating groove 29 for holding the silver coating 6 is fitted to the long side edge portion of the strip substrate 5. Further, when the electrode coating material is applied to the long side edge portion of the strip-shaped substrate 5, for example, in order to apply the coating material so that the back surface side becomes deeper than the front surface side, the cross-sectional shape of the application groove 29 may be formed so as to correspond thereto. Good. In addition, the present invention is
Various design changes can be made without departing from the basic technical idea.

[0028]

As described above, according to the present invention, the electrode coating material in the coating material reservoir is coated by the coating groove by the intermittent rotation and the axial movement of the pair of coating rotary members by the driving device. Scooping, the coating groove containing the electrode coating material is simultaneously or sequentially fitted to the long side edge portions on both sides of the strip-shaped substrate conveyed by the intermittent conveying device, and then separated. In this way, by fitting the application groove holding the electrode coating material to the long side edge portion of the strip-shaped substrate and separating the electrode substrate, the electrode coating material can be applied to both long side edge portions of the strip substrate. Then, by setting the coating groove to a desired depth and width, it is possible to apply the electrode coating material to both long side edges of the strip substrate with a desired width and thickness. In this manner, the electrode coating material can be applied thickly and reliably to the long side edges on both sides of the strip-shaped substrate, and therefore reliability can be improved. Further, the electrode coating material can be applied to both long side edges of the strip-shaped substrate by a simple operation of intermittent rotation of the application rotator and axial movement. Therefore, the coating work efficiency can be improved.

Further, a scraper is provided for scooping the electrode coating material in the coating material reservoir through the coating groove along with the rotation of the coating rotating body, and then removing the electrode coating material adhering to the surface of the coating rotating body. This makes it possible to easily apply the electrode coating material to each strip substrate with a uniform width.

Further, as a coating rotator, it has a coating groove on its outward projecting portion so as to allow the strip-like substrate which is intermittently conveyed to pass through the portion other than the projecting portion at the time of intermittent rotation. By forming the strip-shaped substrate in such a shape, the strip-shaped substrates can be transported on the same surface, and the configuration of the intermittent transport device can be simplified.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a coating material coating device for electrodes on a strip substrate according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view showing the coating material application device for the electrode.

FIG. 3 is a partially enlarged front view showing the paint application device for the electrode.

FIG. 4 is a partially enlarged front view showing a coating material coating device for electrodes on a strip substrate according to a second embodiment of the present invention.

5A is a perspective view of a ceramic substrate, FIG. 5B is a perspective view of a rectangular substrate formed from the ceramic substrate, and FIG. 5C is a state in which silver coating is applied to both long side edges of the rectangular substrate. (D) is a perspective view of the strip-shaped substrate after application divided into one element

[Explanation of symbols]

 5 Strip-shaped substrate 6 Silver paint 11 Transport chain 13 Chuck 21 Paint coating device for electrode 25 Rotating body for coating 26 Rotating body for coating 27 Moving wheel 28 Moving wheel 29 Coating groove 32 Paint reservoir 33 Scraper 34 Scraper 37 Groove cam 38 Groove Cam 41 Arm 42 Arm

Claims (4)

[Claims] 1. A pair of coating grooves having a width wider than the wall thickness of a strip-shaped substrate conveyed by the intermittent conveying device and facing each other, and supported rotatably and axially movable. The coating rotary body and the coating reservoir in which the coating material for the electrode is scooped by the coating groove along with the rotation of these coating rotary bodies, and the intermittent rotation and axial movement of both coating rotary bodies are performed. , By simultaneously fitting and releasing the coating groove for holding the electrode coating material to both long side edges of the conveyed strip-shaped substrate, the electrodes are provided at both long side edges of this strip-shaped substrate. A paint application device for electrodes on a strip-shaped substrate, comprising a drive device for applying paint. 2. A pair of coating grooves having a width wider than the wall thickness of the strip-shaped substrate conveyed by the intermittent conveying device, which face each other, and which are rotatably supported so as to be movable in the axial direction. The coating rotary body and the coating reservoir in which the coating material for the electrode is scooped by the coating groove along with the rotation of these coating rotary bodies, and the intermittent rotation and axial movement of both coating rotary bodies are performed. , By sequentially fitting and releasing the coating groove for holding the electrode coating material with respect to each long side edge portion of the conveyed strip-shaped substrate, the electrodes for both long side edge portions of this strip-shaped substrate A paint application device for electrodes on a strip-shaped substrate, comprising a drive device for applying paint. 3. A scraper is provided, which scoops the electrode coating material in the coating material reservoir through the coating groove as the coating rotator rotates and then removes the electrode coating material adhering to the surface of the coating rotator. The coating material application device for an electrode of a strip substrate according to claim 1 or 2. 4. Each coating rotator has a coating groove on an outward projecting portion, and when intermittently rotating, allows passage of a strip-shaped substrate that is intermittently conveyed at a portion other than the projecting portion. The coating material coating device for an electrode of a strip substrate according to any one of claims 1 to 3, which is formed in such a shape.