JP2017035664A - Coating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further uniformly and surely coat a coating liquid, without causing a film thickness deviation of a coating film on a bottom surface of a recessed place formed in a coating object.SOLUTION: A tool body 1 is constituted by installing a plurality of head members 2 and 3 by bringing side surfaces 2a and 3a extending in the mutual lengthwise directions into close contact, and edge parts 4 and 5 projecting from tip surfaces 2b and 3b of the head members 2 and 3 are provided along the side surfaces 2a and 3a in a tip part of the side surfaces 2a and 3a, and a groove 6 for discharging a coating liquid is opened on the tip of the edge parts 4 and 5, and at least the edge parts 4 and 5 of the head members 2 and 3 are formed of hard metal, and the edge parts 4 and 5 are a square shape when viewed in the lengthwise direction, and projection quantities P4 and P5 of the edge parts 4 and 5 from the tip surfaces 2b and 3b of the head members 2 and 3, are set to 20 times or less of blade widths W4 and W5 of the edge parts 4 and 5 being an interval between groove surfaces 6a and 6b of the groove 6 and outside surfaces 4b and 5b of the edge parts 4 and 5 in the vertical direction to the lengthwise direction when viewed from the tip side.SELECTED DRAWING: Figure 4

Description

  According to the present invention, a tool body is configured by attaching a plurality of head members with their side surfaces in close contact with each other, and a coating liquid is discharged from a groove that opens along the side surface and opens at the tip of the tool body. The present invention relates to an application tool applied to an applied material.

  Conventionally, in order to apply a coating liquid to the surface of a plate-shaped object, for example, as described in Patent Document 1, a plate-shaped object to be coated with a coating liquid is held horizontally. 2. Description of the Related Art A spin coater including a rotating chuck and a coating liquid supply mechanism that drops a coating liquid on the center of the upper surface of the object to be coated is used. In such a spin coater, the coating liquid is dropped while being applied to the coating object, whereby the coating liquid is diffused and applied to the upper surface of the coating object by the centrifugal force generated by the rotation of the coating object.

Japanese Patent Laid-Open No. 10-057876

  However, with such a spin coater, for example, when an application liquid is applied to the bottom surface of an object to be coated having a recess formed on the upper surface, the bottom surface of the recess intersects the wall surface. The coating liquid diffused by centrifugal force accumulates at the corners of the recesses, and a large deviation occurs in the thickness of the coating film.

  In addition, as a means for applying such a coating liquid to an object to be coated, a plurality of head members are attached with their side surfaces in close contact with each other to form a tool body, and along the side surface opened at the tip of the tool body. There is also known an application tool for applying an application liquid by discharging an application liquid from a groove extending in an extended manner. According to such an application tool, by providing the cutting edge portion protruding at the tip of the tool body and forming the groove on the tip surface, the cutting edge portion is inserted into the recess to perform application as described above. A uniform coating film can also be formed on the bottom surface of the recess.

  However, with such an application tool, if the application liquid is applied evenly to the bottom of a relatively deep recess to the very vicinity of the wall surface, the tip of the tool body protrudes from the tip of the tool body with a large amount of protrusion. The blade width of the blade edge portion, which is the distance between the groove surface of the groove and the outer surface of the blade edge portion in the direction perpendicular to the direction in which the opening of the groove extends when viewed from above, must be reduced. For this reason, for example, in a coating tool in which the head member is made of stainless steel including the blade edge portion, when the blade width is set to about 0.5 mm, the blade edge portion becomes insufficient in rigidity and deforms due to the internal pressure of the coating liquid. Therefore, the protrusion amount cannot be three times (1.5 mm) or more of the blade width, and it becomes difficult to apply the coating liquid to a deeper recess.

  The present invention has been made under such a background, and the coating liquid can be more evenly and reliably applied without causing a film thickness deviation of the coating film on the bottom surface of the recess or the like formed in the object to be coated. An object of the present invention is to provide a coating tool capable of performing the above.

  In order to solve the above problems and achieve such an object, according to the present invention, a tool main body is configured by attaching a plurality of head members so that side surfaces extending in the longitudinal direction of each other are in close contact with each other. An application tool that discharges a coating liquid from a groove opened at the tip of the tool body extending along the surface of the tool body and applies it to an object to be coated. Are provided with edge portions protruding from the front end surface of the head member along the side surfaces, the grooves are opened at the front ends of the blade edge portions, and at least the edge portion of the head member is made of carbide. The blade edge portion is formed of an alloy and has a square shape when viewed in the longitudinal direction, and the protrusion amount of the blade edge portion from the distal end surface of the head member is in the longitudinal direction when viewed from the distal end side. Characterized in that it is more than 20 times the blade width of the blade tip portion is a distance between the outer surface of the groove surface and the cutting edge portion of the groove in the straight direction.

  In such a coating tool, at least the cutting edge portion of the head member is made of a highly rigid cemented carbide having a Young's modulus higher than that of stainless steel or the like, and the straightness of the cutting edge portion may be 2 μm / m or less. Therefore, even if the blade width is extremely thin of about 0.2 mm to 0.5 mm and the protrusion amount of the blade edge portion is 20 times the blade width at the maximum (4.0 mm to 10.0 mm), the film thickness A coating film with little deviation can be formed. Furthermore, the blade edge portion has a rectangular shape when viewed in the longitudinal direction in which the opening of the groove extends, and the coating liquid spreads and is applied on the tip surface of the blade edge portion, so that even if the depth of the recess is relatively deep, for example A coating film can be formed from the wall surface of the recess to a position very close to 0.1 mm, and it is possible to reliably form a coating film having a uniform thickness evenly on the bottom surface of such a recess. .

  Here, if the amount of protrusion of the blade edge portion is 18 times or less of the blade width, higher film thickness uniformity can be obtained. However, it is desirable that the protruding amount of the blade edge portion is three times or more of the blade width. If the protruding amount is smaller than this, the coating liquid can be uniformly applied to the bottom surface of the deep recess. There is a risk that it will not be possible.

  In addition, the plurality of head members may be formed entirely of cemented carbide including the cutting edge portion, but in the longitudinal direction, the tip portions of the side surfaces of the plurality of head members brought into close contact with each other. By forming a recess along the tip and providing the cutting edge on the tip side of a cemented carbide cutting edge member attached to the recess, the head member other than the cutting edge member can be formed of stainless steel or the like. For this reason, it becomes possible to process easily the screw hole etc. at the time of attaching a some head member with a clamp bolt, for example. Further, in this case, the blade edge member is provided with a base end portion that has a width larger than the blade width and is attached to the concave portion, so that the blade edge portion is formed by the base end portion having a large width. It can be supported with high rigidity, and the film thickness can be further uniformed.

  Further, of the side surfaces of the plurality of head members that are brought into close contact with each other, one side surface is formed in a planar shape up to the tip of the blade edge portion, and the other side surface is recessed with respect to the one side surface. By forming the groove, for example, a shim is interposed between the side surfaces, or side plates are provided on the side portions of the plurality of head members, so that the groove is formed on the entire inner surface of the groove. As a result, the surface roughness can be made uniform, variation in the flow rate of the coating solution at both ends of the groove can be prevented, the sag distance described later can be kept small, and a more uniform coating film can be formed.

  As described above, according to the present invention, even in the case where the coating liquid is applied to the bottom surface of the recess formed in the object to be coated, the uniform evenly with little deviation even to the very vicinity of the wall surface of the recess. It becomes possible to reliably form a coating film having a thickness.

It is a front view showing one embodiment of the present invention. It is the top view which looked at embodiment shown in FIG. 1 from the front end side. It is the side view which looked at embodiment shown in FIG. 1 from the longitudinal direction. It is an enlarged view of the A section in FIG. It is an enlarged view of the B section in FIG. It is the side view seen from the longitudinal direction which shows the modification of embodiment shown in FIG. It is an enlarged view of the C section in FIG. Based on the embodiment shown in FIG. 1 to FIG. 5, the result of measuring the film thickness when the coating film is formed by the coating tool with the protruding amount of the blade edge portion changed along the longitudinal direction in which the groove opening extends is shown. (A) is the result of Example 1 in which the protrusion amount is 18 times the blade width, (b) is the result of Example 2 in which the protrusion amount is 20 times the blade width, and (c) is the protrusion amount. The result of the comparative example 1 22 times the blade width is shown. It is a front view which shows the position which measured the surface roughness of this shim in the comparative example 2 which is a coating tool using the stainless steel shim to form a groove | channel. When the coating film is formed by Example 1 whose result is shown in FIG. 8A based on the embodiment shown in FIGS. 1 to 5 and Comparative Example 2 using the stainless steel shim shown in FIG. It is a figure which shows the result of having measured the film thickness of along the longitudinal direction where the opening part of a groove | channel extends, (a) is a result of the comparative example 2, (b) is a result of Example 1 (FIG. 8 (a)). The same as in Example 1).

  1 to 5 show an embodiment of the present invention. In the application tool of the present embodiment, the tool body 1 has a horizontally long block shape having a longitudinal direction in the lateral direction (left and right direction in FIGS. 1 and 2), and a cross section perpendicular to the longitudinal direction is the longitudinal direction (FIG. 1). And a pair of head members 2 and 3 having a substantially rectangular parallelepiped shape that is substantially rectangular in the vertical direction in FIG. 3 and having substantially the same shape and the same size, are attached with the side surfaces 2a and 3a extending in the longitudinal direction in close contact with each other. Has been.

  The head members 2 and 3 protrude from the front end surfaces 2b and 3b of the head members 2 and 3 at the front end portions (the upper end portions in FIGS. 1 and 3) of the side surfaces 2a and 3a. Cutting edge portions 4 and 5 are provided, respectively, so that the grooves 6 for discharging the coating liquid extend in the longitudinal direction at the tip ends of the tool body 1, that is, the tip surfaces 4a and 5a of these cutting edge portions 4 and 5. It is open. The groove width W6 of the groove 6 is constant in the direction in which the opening of the groove 6 extends in the tip surfaces 4a and 5a, that is, in the longitudinal direction.

  Of the pair of head members 2 and 3, one head member 2 has a planar shape in which the side surface (one side surface) 2 a extends to the tip of the blade edge portion 4. On the other hand, in the present embodiment, the side surface (the other side surface) 3a of the other head member 3 is closer to the rear end side (lower side in FIGS. 1 and 3) than the blade edge portion 5, and FIG. As shown in the figure, a manifold 7 having a semicircular groove shape whose cross section perpendicular to the longitudinal direction is formed to extend in the longitudinal direction, and the other head member 3 is also formed at the center in the longitudinal direction of the manifold 7. A supply hole 7a for the formed coating liquid is connected.

  Further, the groove 6 is formed on the side surface 3 a of the other head member 3 so as to be recessed with respect to the side surface 2 a of the one head member 2 from the manifold 7 to the tip surface 5 a of the blade edge portion 5. The opening on one head member 2 side of the groove 6 is sealed by the side surface 2a of the one head member 2, so that it communicates with the manifold 7 and the front end surfaces 4a of the cutting edge portions 4 and 5; The groove 6 opened to 5a is formed. In the longitudinal direction, both end portions of the manifold 7 are formed slightly longer than both end portions of the groove 6.

  Further, the blade edge portions 4 and 5 have a rectangular shape as shown in FIG. 4 when viewed from the direction in which the opening of the groove 6 extends, that is, in the longitudinal direction. It is formed in a rectangular shape. Therefore, the tip surfaces 4a and 5a of the blade edge portions 4 and 5 are flat surfaces parallel to and flush with the tip surfaces 2b and 3b of the head members 2 and 3, and the outer surface 4b of the blade edge portions 4 and 5 facing the outside. Reference numeral 5b denotes a planar shape perpendicular to the tip surfaces 2b, 3b, 4a, and 5a. In addition, as shown in FIG. 1, the blade edge | tip parts 4 and 5 are not provided in the both ends of the longitudinal direction of the head members 2 and 3, and are provided so that it may extend in the longitudinal direction only in the center part between them. Yes.

  Furthermore, as shown in FIG. 5, the groove surfaces 6 a and 6 b of the groove 6 and the cutting edge portions 4 and 5 described above in the direction perpendicular to the longitudinal direction in which the opening of the groove 6 extends when viewed from the tip side of the tool body 1. The blade widths W4 and W5 of the blade edges 4 and 5 which are the distances from the outer side surfaces 4b and 5b are also constant, and in this embodiment, the blade widths W4 and W5 are within the range of 0.2 mm to 0.5 mm. The widths are equal to each other. The groove 6 is formed at both ends of the groove 6 so as to be recessed with respect to the side surface 2a of one head member 2 as described above, so that the groove wall 6c perpendicular to the groove surfaces 6a and 6b is formed. Is formed. In addition, as for the space | interval of the end surface which faces the longitudinal direction outer side of the blade edge | tip parts 4 and 5, and the groove wall 6c, it is desirable to set it as 1 mm or less.

  And at least the blade edge portions 4 and 5 of the head members 2 and 3 are formed of cemented carbide, and the protrusion amounts P4 and P5 of the blade edge portions 4 and 5 from the tip surfaces 2b and 3b of the head members 2 and 3 are The blade width is set to 20 times or less of the blade widths W4 and W5, and preferably 18 times or less of the blade widths W4 and W5. Further, it is desirable that the protrusion amounts P4 and P5 be three times or more of the blade widths W4 and W5.

  Furthermore, in the present embodiment, recesses 2c and 3c having an L-shaped cross section along the longitudinal direction are formed at the distal ends of the side surfaces 2a and 3a of the pair of head members 2 and 3 that are brought into close contact with each other. The blade edge portions 4 and 5 are provided on the cemented carbide blade edge members 8 and 9 to which the base end portions 8a and 9a are attached to the recesses 2c and 3c, respectively. Here, the base end portions 8a and 9a of the blade edge members 8 and 9 are formed in a rectangular cross section having a width sufficiently larger than the blade widths W4 and W5, and are attached to the recesses 2c and 3c. The side surfaces and the front end surfaces thereof are flush with the side surfaces 2a and 3a and the front end surfaces 2b and 3b of the head members 2 and 3, respectively, and the blade edge portions 4 and 5 are integrally sintered with the base end portions 8a and 9a. 8 and 9 are formed on the tip side.

  The portions other than the blade edge members 8 and 9 of the head members 2 and 3 are made of a metal material such as stainless steel, for example, and the base end portions 8a and 9a of the cemented carbide blade edge members 8 and 9 are as described above. The recesses 2c and 3c are attached by being joined by brazing or the like. Further, in the portions other than the blade edge members 8 and 9 of the head members 2 and 3, stepped through holes and screw holes are provided so as to avoid the recesses 2c and 3c, the groove 6, the manifold 7 and the supply hole 7a. Are formed coaxially, and the clamp bolt 10 inserted through the through hole is screwed into the screw hole, whereby a plurality (a pair) of head members 2 and 3 are attached to constitute the tool body 1.

  In the coating tool configured in this way, the tip end portion of the tool body 1 is normally supported downward, and the tip surfaces 4a and 5a of the blade edge portions 4 and 5 are, for example, the upper surface of the plate-like object (the surface to be coated). ) In a direction perpendicular to the longitudinal direction in which the opening of the groove 6 extends as seen from the front end side while discharging the coating liquid supplied from the supply hole 7a to the manifold 7 from the groove 6 The coating solution is applied by moving the coating relative to the object to be coated. Here, even when the surface to be coated is a bottom surface of a recess having a square shape in plan view and the wall surface of the recess is present in the direction of relative movement of the tool body 1, the application of the above configuration is performed. In the tool, since the blade edge portions 4 and 5 are square when viewed in the longitudinal direction, the outer surfaces 4b and 5b of the blade edge portions 4 and 5 can be brought close to the wall surface.

  And in the coating tool of the said structure, at least the blade edge | tip parts 4 and 5 of the head members 2 and 3 are formed with the cemented carbide with a high Young's modulus, and the straightness of the blade edge | tip parts 4 and 5 is 2 micrometers / m or less. High accuracy can be maintained. Therefore, the blade widths W4 and W5 are the extremely thin blade edge portions 4 and 5 in the range of 0.2 mm to 0.5 mm as described above, and the protrusion amounts P4 and P5 of the blade edge portions 4 and 5 are set to the blade edges. Even when the widths W4 and W5 are set to a maximum of 20 times, the deviation of the groove width W6 of the groove 6 due to the internal pressure of the coating liquid can be suppressed.

  Therefore, according to the coating tool having the above-described configuration, the blade tips 4 and 5 are inserted into the relatively deep recess, and the groove 6 is positioned very close to the wall surface, and the film is formed on the bottom surface of the recess. A coating film having a small thickness deviation can be formed. Further, since the coating liquid spreads and is applied in the direction perpendicular to the longitudinal direction in which the opening of the groove 6 extends on the tip surfaces 4a and 5a of the blade edge portions 4 and 5, for example, 0. It becomes possible to reliably form a coating film having a uniform film thickness evenly up to a position of 1 mm. When the protrusion amounts P4 and P5 of the blade edge portions 4 and 5 exceed 20 times the blade widths W4 and W5, the coating uniformity (Unif) exceeds 3% and the film thickness deviation becomes large as shown in an example described later. There is a risk of becoming too much.

  Here, if the protrusion amounts P4 and P5 of the blade edge portions 4 and 5 are set to 18 times or less of the blade widths W4 and W5, it is possible to form a coating film with a more uniform film thickness. However, if the protruding amounts P4 and P5 of the blade edge portions 4 and 5 are too small, the coating liquid may not be applied to the bottom surface of the deep recess as described above. The protrusion amounts P4 and P5 are preferably 3 times or more of the blade widths W4 and W5 as in this embodiment, more preferably 5 times or more, and more preferably 10 times or more. desirable.

  On the other hand, in the present embodiment, in order to provide such blade edge portions 4 and 5 at the front end portions of the side surfaces 2a and 3a of the head members 2 and 3 which are brought into close contact with each other, at the front end portions of these side surfaces 2a and 3a, Concave portions 2c and 3c are formed along the longitudinal direction in which the opening of the groove 6 extends, and the cutting edge portions 4 and 5 are provided on the distal end side of the cutting edge members 8 and 9 made of cemented carbide attached to these concave portions. ing.

  However, in this respect, for example, the entire head members 2 and 3 can be formed of cemented carbide. In such a case, for example, the head members 2 and 3 are attached as in the present embodiment. When the clamp bolt 10 is used, it is difficult to form a screw hole into which the clamp bolt 10 is screwed. In the present embodiment, the head members 2 and 3 other than the blade edge members 8 and 9 are made of stainless steel as described above. Since it can form with metal materials, such as steel, screwing can be made easy. Further, the cost of the head members 2 and 3 can be reduced.

  Further, in the present embodiment, the blade edge members 8 and 9 have base end portions 8a and 9a having a width larger than the blade widths W4 and W5 of the blade edge portions 4 and 5, and the base end portions 8a and 8a, 9a is attached to the recesses 2c and 3c. For this reason, since the blade edge portions 4 and 5 can be disposed on the head members 2 and 3 with high rigidity supported by the base end portions 8a and 9a having a larger width than this, the thickness of the coating film can be further increased. Uniformity can be achieved. In addition, in the present embodiment, the distal end surfaces of the base end portions 8a and 9a are flush with the distal end surfaces 2b and 3b of the head member 2, and the outer side surfaces 4b and 5b of the blade edge portions 4 and 5 Since it intersects perpendicularly with the tip surfaces of the end portions 8a, 9a, the blade edge portions 4, 5 can be supported with higher rigidity.

  However, without making the base end portions 8a and 9a of the blade edge members 8 and 9 larger than the blade widths W4 and W5 of the blade edge portions 4 and 5 in this way, for example, in the above embodiment shown in FIGS. As in the modification, the blade members 8 and 9 are formed in a plate shape having a width equal to the blade widths W4 and W5 from the blade edge portions 4 and 5 to the base end portions 8a and 9a, and the blade width W4, You may attach to the recessed parts 2c and 3c of the width | variety according to W5. In this modification, the same reference numerals are assigned to portions common to the embodiment shown in FIGS. According to such a modification, it is possible to further reduce the cost by further reducing the amount of cemented carbide used.

  Further, in the above-described embodiment and its modifications, of the side surfaces 2 a and 3 a of the head members 2 and 3 that are brought into close contact with each other, the side surface 2 a of one head member 2 is formed in a planar shape up to the tip of the blade edge portion 4. In addition, the groove 6 that is recessed with respect to the side surface 2a of the one head member 2 is formed on the side surface 3a of the other head member 3, and the groove 6 is directly used as the tip surface 4a of the cutting edge portions 4 and 5, It opens to 5a. And the groove surface 6a, 6b, the groove wall 6c, and the front-end | tip of the blade edge | tip parts 4 and 5 in the cutting edge parts 4 and 5 of the cemented carbide of the groove | channel 6 of such one planar side surface 2a or the other side surface 3a. The finishing of the surfaces 4a and 5a is performed by grinding.

  However, also in this respect, in order to form the groove 6 as described above, instead of forming the groove 6 on the other side surface 3a, the other side surface 3a is also planar, and one of the same planar shape is formed. It is possible to form a groove 6 with a shim interposed between the side surface 2a, but in such a case, the groove width W6 is usually about the same size as the blade widths W4 and W5. In order to form the groove 6, it is difficult to manufacture the same cemented carbide shim as the cutting edge portions 4 and 5, and a metal shim such as stainless steel must be used. However, in this case, such a metal shim has a groove wall 6 or a tip end surface that is in contact with the coating solution, which is processed by wire cutting or etching. In contrast to the groove surfaces 6a and 6b, the groove wall 6c, and the tip surfaces 4a and 5a, the surface roughness of the groove wall and the tip surface formed in the shim becomes rough.

  Compared with such a case, according to the said embodiment, it grinds over the inner surface of the groove | channel 6 which consists of groove surface 6a, 6b, and the groove wall 6c, and the front end surface 4a, 5a of the blade edge | tip part 4,5. Can be formed with a uniform surface roughness. In particular, variations in the flow rate of the coating liquid at both ends of the groove 6 where the groove wall 6c is located and the end faces 4a and 5a connected to the groove wall 6c are suppressed to be small, and more uniform. A coating film can be formed. Moreover, in the said embodiment, since the said side surface 2a of one head member 2 is planar shape, such a grinding process can also be performed comparatively easily.

  In the above-described embodiment, the case where the coating film is formed using the bottom surface of the recess where the coating object is formed as the coating surface has been described. However, the coating tool having the above-described configuration can be used only for the bottom surface of such a recess. In the case where protruding walls and protrusions are formed adjacent to the surface to be coated, it can also be used to form a coating film having a uniform film thickness very close to the protruding walls and protrusions. . Moreover, even if it is used to apply the coating liquid to a flat coated surface of a plate-shaped coated object, for example, instead of the bottom surface of such a recess, the coated surface on which protruding walls or protrusions are formed, Of course.

  Next, examples of the present invention will be given to demonstrate the effects of the present invention. In this example, first, based on the embodiment shown in FIGS. 1 to 5, the blade widths W4 and W5 of the blade edge portions 4 and 5 are both 0.3 mm, and the groove width W6 of the groove 6 is 0.5 mm. As shown in FIG. 5, the opening width L of the groove 6 in the longitudinal direction in which the opening of the groove 6 extends on the tip surfaces 4a and 5a of the blade edges 4 and 5 is 70 mm, and the opening of the groove 6 also extends as shown in FIG. In the longitudinal direction, a coating tool having a coating width M of 72 mm in the blade edge portions 4 and 5, the protrusion amounts P4 and P5 of the blade edge portions 4 and 5 shown in FIG. 4 are 5.4 mm which is 18 times the blade widths W4 and W5. Two types were manufactured, one with a size of 6.0 mm and 20 times. These are referred to as Examples 1 and 2.

  Further, as Comparative Example 1 with respect to Examples 1 and 2, the blade widths W4 and W5, the groove width W6, the opening width L, and the coating width M are equal to those in Examples 1 and 2, and the protrusion amounts of the blade edge portions 4 and 5 are as follows. An application tool was also manufactured in which P4 and P5 were 6.6 mm, 22 times larger than 20 times the blade widths W4 and W5. And the coating distance is applied to the object to be coated with the coating tools of Examples 1 and 2 and Comparative Example 1, and the measurement distance from one end to the other end of the coating film in the direction in which the opening of the groove 6 extends. The film thickness with respect to was measured. The results are shown in FIGS. 8A to 8C in the order of Examples 1 and 2 and Comparative Example 1.

  The coating conditions at this time are as follows: the coating liquid is an optical elastic resin, the viscosity is 5000 to 7000 cps, the target film thickness is 100 μm, and the coating speed (relative movement speed between the coating tool and the object to be coated) is 0. It was 9 m / min. Further, on the basis of the measurement results of FIGS. 8A to 8C, Examples 1 and 2 and Examples 1 and 2 except for the part that shifts from the painted end at both ends of the measurement distance in each figure to the target film thickness 100 μm. The maximum value, minimum value, film thickness range, average value, and Coating Uniformity (Unif) of Comparative Example 1 were calculated. Coating Uniformity (Unif) is a percentage (%) of (film thickness range) / (average value × 2). The smaller the value, the more uniform the film thickness, and generally 3% or less. It can be evaluated as a uniform film thickness. The results are shown in Tables 1 to 3 in the order of Examples 1 and 2 and Comparative Example 1.

  From these results of FIGS. 8A to 8C and Tables 1 to 3, in Comparative Example 1 in which the protrusion amounts P4 and P5 of the blade edge portions 4 and 5 are 22 times the blade widths W4 and W5, Coating Uniformity (Unif ) Was 3.48% and 3% higher than 20%, but in Example 2, which is 20 times lower than 2.52% and 3%, and in Example 1, which is 18 times, 1.41% and 3%. It was also less than 1.5% which is 1/2 of%. From this, it is possible to form a coating film with a uniform film thickness when the protruding amounts P4, P5 of the blade edge portions 4, 5 are 20 times or less of the blade widths W4, W5 as in the present invention, and 18 times or less. Then, it was confirmed that the film thickness can be made even more uniform.

  Next, in order to form a groove opened at the tip of the tool body, the groove surface 6b and the groove wall 6c are formed on the cutting edge portion 5 made of cemented carbide on the side surface 3a of the other head member 3 as in the above embodiment. Instead of forming the groove 6 having an opening to the front end surface 5a, the side surfaces of the pair of head members having the flat side surface 2a up to the front end surface 4a of the blade edge portion 4 as in the case of the one head member 2. A coating tool having a groove formed by interposing a stainless steel shim S as shown in the front view of FIG. In Comparative Example 2, the blade widths W4 and W5 of the blade edge portion, the groove width W6 of the groove, the opening width L of the groove, the coating width M of the blade edge portion, and the protrusion amounts P4 and P5 of the blade edge portion are the same as in the first embodiment. It is.

  First, the surface roughness of the position of the tip surface of the shim S in Comparative Example 2 indicated by reference numeral S1 in FIG. 9 and the position of the groove wall of the groove indicated by reference numeral S2 was measured, and the arithmetic average roughness in JIS B 0601-2001 was measured. At the depth Ra, the tip surface S1 was 1.557 μm, and the groove wall S2 was 2.034 μm. On the other hand, the surface roughness of the cutting edge portions 4 and 5 of the coating tool of Example 1 is the same as the arithmetic average roughness Ra in JIS B 0601-2001, the tip surfaces 4a and 5a are 0.010 μm, and the groove 6 The groove surfaces 6a and 6b were 0.008 μm and the groove wall 6c was 0.014 μm.

  Next, according to Example 1 and Comparative Example 2, a coating film is formed under the same coating conditions as in Examples 1 and 2 and Comparative Example 1 described above, and from one end of the coating film in the direction in which the groove opening extends. Measure the film thickness (μm) against the measurement distance (mm) to the other end, and based on this, the maximum value, minimum value, film thickness range, average value, and Coating Uniformity (Unif) The sagging distance between the two ends of the coating film in the direction in which the opening of the groove extends (distance from the coating end of both ends of the coating film to the target film thickness of 100 μm) was calculated. These results are shown in FIGS. 10A and 10B and Tables 4 and 5 in the order of Comparative Example 2 and Example 1. FIG. Accordingly, the maximum value, minimum value, film thickness range, average value, and coating uniformity (Unif) of FIG. 10 (b) and Table 5, which are the results of Example 1, are shown in FIG. 1 (a) and Table 1. be equivalent to.

  10 (a) and 10 (b) and Tables 4 and 5, the application tool of Comparative Example 2 has a sag distance as long as 1.16 mm and a coating uniformity (Unif) of 5.09% as described above. Example 2 was larger than Comparative Example 1 as well as Example 2, and the deviation in film thickness was remarkable. On the other hand, in Example 1, as described above, the coating uniformity (Unif) is suppressed to be small, the sagging distance is also as short as 0.72 mm, and the opening width L in the direction in which the opening of the groove 6 extends. It can be seen that a wider and uniform coating film can be formed within the range of the coating width M.

  As described above, according to the present invention, even in the case where the coating liquid is applied to the bottom surface of the recess formed in the object to be coated, the uniform evenly with little deviation even to the very vicinity of the wall surface of the recess. It becomes possible to reliably form a coating film having a thickness.

DESCRIPTION OF SYMBOLS 1 Tool body 2, 3 Head member 2a, 3a Side surface 2b, 3b head member 2 and 3 contact | adhered mutually The front end surface 2c of the head member 2, 3 3c Recessed part 4, 5 Blade edge part 4a, 5a Tip surface 4b, 5b outer surface of blade edge portion 4, 5 6 groove 6a, 6b groove surface 6c groove wall 7 manifold 8, 9 blade edge member 8a, 9a proximal end portion of blade edge member 8, 9 10 clamp bolt W4, W5 blade edge Blade width P4, P5 Protrusion amount of the blade edge portions 4, 5 W6 Groove width of the groove 6 L Opening width of the groove 6 M Coating width of the blade edge portions 4, 5

Claims (6)

A plurality of head members are attached with their side surfaces extending in the longitudinal direction in close contact with each other to constitute a tool body, and a coating liquid is discharged from a groove opened at the tip of the tool body extending along the side surface. An application tool for applying to an application,
The front end portions of the side surfaces of the plurality of head members that are in close contact with each other are provided with cutting edge portions protruding from the front end surfaces of the head members along the side surfaces, respectively, and the grooves are the front ends of these cutting edge portions. Open to
At least the cutting edge portion of the head member is formed of a cemented carbide,
The cutting edge is rectangular when viewed in the longitudinal direction,
The cutting edge whose protrusion amount of the cutting edge portion from the tip surface of the head member is a distance between the groove surface of the groove and the outer surface of the cutting edge portion in a direction perpendicular to the longitudinal direction when viewed from the tip side. An application tool characterized by being 20 times or less the blade width of the part.   The coating tool according to claim 1, wherein an amount of protrusion of the blade edge portion is 18 times or less of the blade width.   The coating tool according to claim 1 or 2, wherein an amount of protrusion of the blade edge portion is set to three times or more of the blade width.   A concave portion is formed along the longitudinal direction at the distal end portion of the side surface of the plurality of head members that are brought into close contact with each other, and the cutting edge portion is a cutting edge member made of cemented carbide that is attached to the concave portion. The coating tool according to any one of claims 1 to 3, wherein the coating tool is provided on a distal end side.   The coating tool according to claim 4, wherein the blade edge member has a base end portion that has a width larger than the blade width and is attached to the concave portion.   Of the side surfaces of the plurality of head members that are in close contact with each other, one side surface is formed in a planar shape up to the tip of the blade edge portion, and the other side surface is recessed with respect to the one side surface. The coating tool according to any one of claims 1 to 5, wherein the coating tool is formed.

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