JP3858342B2 - Coating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coating apparatus that applies a paste material made of metal or the like to an end face of a strip-shaped substrate in an electronic component manufacturing method to form an end face electrode.
[0002]
[Prior art]
As a conventional coating apparatus, an electrode material is coated on a microfilm of Japanese Utility Model Application No. 60-55004 (Japanese Utility Model Application No. 61-171205) with an application roller having an annular groove from the upper surface of an electronic component. A coating apparatus for forming is disclosed.
[0003]
Hereinafter, a conventional coating apparatus will be described with reference to the drawings.
[0004]
FIG. 4A is a side view of a conventional coating apparatus, and FIG. 4B is an enlarged view of a coating roller that is a main part of the coating apparatus.
[0005]
In the figure, reference numeral 1 denotes a support base which is installed on the upper surface of the transfer conveyor 2 and has a plurality of narrow grooves (not shown) formed in parallel with the traveling direction of the conveyor 2. Reference numeral 3 denotes a strip-shaped substrate made of ceramic or the like installed so as to fit in a narrow groove (not shown) of the support base 1. Reference numeral 4 denotes an application roller installed on the upper surface of the support 1 so as to be in contact with the strip-shaped substrate 3. A plurality of grooves 5 are provided on the circumferential surface of the application roller 4. Reference numeral 6 denotes a paste tank that is adjacent to the application roller 4 and is installed so as to supply paste material to the application roller 4. Reference numeral 7 denotes an end face electrode formed on the end face of the strip-shaped substrate 3 by the application roller 4.
[0006]
About the conventional coating device comprised as mentioned above, the operation | movement is demonstrated below.
[0007]
The application roller 4 rotates and the paste material in the paste tank 6 is supplied into the groove 5 on the surface of the application roller 4. On the other hand, one end surface in the longitudinal direction of the strip-shaped substrate 3 to be coated is placed in a plurality of narrow grooves (not shown) formed in the coating roller 4 so as to be parallel to the traveling direction of the conveyor 2. The end face is disposed so as to be loosely fitted in the groove 5 provided in the application roller 4. When the conveyor 2 is advanced and the application roller 4 is rotated, the paste material in the paste tank 6 is appropriately supplied to the surface of the application roller 4 and the paste material enters the groove 5. The end face electrode 7 can be formed on the surface.
[0008]
[Problems to be solved by the invention]
However in the conventional configuration, may coating amount of the paste material is altered by the relative position between the groove 5 and the strip-shaped base 3 provided on the coating roller 4, also has a strip-shaped base 3 by the viscosity of the paste material Since the application roller 4 may be lifted, there is a problem that it is difficult to uniformly apply the paste material.
[0009]
SUMMARY OF THE INVENTION In order to solve the above-described problems, an object of the present invention is to provide a coating apparatus that can form end face electrodes uniformly without a strip-shaped substrate being lifted and wound up by a coating roller. is there.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention rotates the coating roller while supplying the paste material from the doctor to the surface of the coating roller and moves the coating jig along the rail and is held by the coating jig. An end face electrode is formed by applying the paste material supplied to the surface of the coating roller so that the strip-shaped substrate rides on the coating roller to the end surface of the strip-shaped substrate .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, there are provided a coating jig for arranging strip-shaped bases in a horizontal row at predetermined intervals in a plurality of grooves and moving the upper surface of the rail, and below the rail. And an application roller for applying a paste material to an end face of the strip-shaped substrate , and a doctor provided adjacent to the application roller, while supplying the paste material from the doctor to the surface of the application roller The strip shape held on the application jig by rotating the application roller while making the movement speed of the application jig equal to the rotation speed of the application roller and moving the application jig along the rail. The paste material supplied to the surface of the coating roller is applied to the end surface of the strip-shaped substrate so that the substrate runs on the coating roller to form an end surface electrode.
[0012]
According to the above configuration, the application roller is because at the bottom of the strip-like substrate is a member to be coated, rather that this strip-shaped base are caught lifted the application roller, to uniformly form the end surface electrodes It has the effect that it can be.
[0013]
Hereinafter, a coating apparatus according to an embodiment of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 is a perspective view of a coating apparatus according to an embodiment of the present invention.
[0015]
In FIG. 1 , reference numeral 11 denotes a coating jig for moving the upper surface of the rail 12 while holding a strip-shaped substrate . Reference numeral 13 denotes a strip-shaped substrate made of ceramic or the like arranged in parallel in a horizontal row at a predetermined interval in a groove 14 provided in the coating jig 11. An application roller 15 is provided below the rail 12 and applies a paste material to the end face of the strip-shaped substrate 13. A doctor 16 is provided adjacent to the application roller 15 and supplies paste material to the application roller 15.
[0016]
The operation of the coating apparatus according to the embodiment of the present invention configured as described above will be described below.
[0017]
FIG. 2A is a cross-sectional view of a coating apparatus according to an embodiment of the present invention, and FIG. 2B is a cross-sectional view showing the operation of a coating roller as the main part. FIG. 3 is a cross-sectional view showing the shape of the end face electrode by the coating apparatus.
[0018]
First, a strip-shaped substrate 23 that is an object to be coated is arranged in a plurality of grooves 22 provided in the coating jig 21, and the coating jig 21 is held above the coating roller 24.
[0019]
Next, the application roller 24 is rotated and the paste material 26 is supplied from the doctor 25 to form a uniform paste film 27 on the surface of the application roller 24.
[0020]
Next, the application jig 21 is moved horizontally along the rail (not shown) at the speed VP while the application roller 24 is rotated at the speed VR. At this time, the strip-shaped substrate 23 is moved so as to ride on the application roller 24 so as to be in contact with the paste film 27, and the end surface electrode 28 is formed on the end surface of the strip-shaped substrate 23.
[0021]
As described above, since the application roller 24 is provided below the application jig 21, a force attracted to the application roller 24 side by gravity applied to the strip-shaped substrate 23 and the viscosity of the paste material 26 acts downward. The strip-shaped substrate 23 can be moved above the coating roller 24 while maintaining a substantially constant positional relationship without being wound around the coating roller 24.
[0022]
Further, when the movement speed VP of the application jig 21 and the rotation speed VR of the application roller 24 are equal, a more uniform end face electrode can be applied. When the movement speed VP of the application jig 21 and the rotation speed VR of the application roller 24 are substantially equal, as shown in FIG. 3A, the end surface of the strip-shaped substrate 31 has an end surface having a substantially uniform size. An electrode 32 is formed. However, when the moving speed VP is smaller than the rotational speed VR, a large amount of one side of the end face electrode 33 is applied as shown in FIG. 3B. On the other hand, when the moving speed VP is larger than the rotational speed VR, FIG. As described above, a large amount of one side of the end face electrode 34 is applied.
[0023]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a coating apparatus capable of uniformly forming the end face electrodes without causing the strip-shaped substrate to be lifted and wound on the coating roller.
[Brief description of the drawings]
FIG. 1 is a perspective view of a coating apparatus according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the coating apparatus. FIG. FIG. 4 is a cross-sectional view showing the shape of an end face electrode formed by the coating apparatus. FIG. 4A is a side view of a conventional coating apparatus. FIG.
11 Application Jig 12 Rail 13 Strip Base 14 Groove 15 Application Roller 16 Doctor

Claims (1)

A strip of bases arranged in a horizontal row at predetermined intervals in a plurality of grooves, and an application jig for moving the upper surface of the rail, and a paste material provided below the rail and on the end surface of the strip base A coating roller for coating the coating roller, and a doctor provided adjacent to the coating roller, while the paste material is supplied from the doctor to the surface of the coating roller, the moving speed of the coating jig and the rotation of the coating roller The coating roller is rotated at the same speed and the coating jig is moved along a rail so that the strip-shaped substrate held by the coating jig runs on the coating roller. An applicator configured to apply the paste material supplied to the surface of the application roller to an end face of the strip-shaped substrate to form an end face electrode.

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