JP6631081B2 - Application tool - Google Patents

Description

  According to the present invention, a tool body is formed by attaching a plurality of head members with their side surfaces in close contact with each other, and a coating liquid is discharged by discharging a coating liquid from a groove opened along the side surface and opening at a tip end portion of the tool body. The present invention relates to an application tool for applying an application.

  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 horizontally held. A spin coater including a rotating chuck and a coating liquid supply mechanism for dropping a coating liquid at the center of the upper surface of the object is used. In such a spin coater, the application liquid is dropped while rotating the object to be applied, so that the application liquid is diffused and applied to the upper surface of the object by the centrifugal force generated by the rotation of the object.

JP-A-10-058767

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

  Further, a tool main body is formed by applying a plurality of head members with their side surfaces in close contact with each other, and the tool main body is configured to be applied to the object to be coated. There is also known a coating tool which discharges a coating liquid from a groove extending and applies the coating liquid to an object to be coated. According to such an application tool, by providing a protruding cutting edge at the tip of the tool main body and forming the groove on the tip end surface, the cutting edge is inserted into the recess and coating is performed. A uniform coating film can also be formed on the bottom of the recess.

  However, when such a coating tool is used to apply the coating liquid evenly to the bottom surface of the relatively deep recess as close as possible to the wall surface, the blade tip protrudes from the tool body tip with a large amount of protrusion, while the tip side The blade width of the cutting edge, which is the distance between the groove surface of the groove and the outer surface of the cutting edge in the direction perpendicular to the direction in which the opening of the groove extends when viewed from above, must be small. For this reason, for example, in the case of a coating tool in which the head member is formed of stainless steel including the blade tip portion, when the blade width is set to about 0.5 mm, the blade tip portion becomes insufficient in rigidity and is deformed by the internal pressure of the coating liquid, and the film thickness is also reduced. , The protrusion amount cannot be set to three times (1.5 mm) or more of the blade width, and it becomes difficult to apply the coating liquid to a recess deeper than that.

  The present invention has been made under such a background, and it is possible to more reliably and uniformly apply a coating liquid without causing a thickness deviation of a coating film on a bottom surface such as a recess formed in an object to be coated. An object of the present invention is to provide an application tool capable of performing the following.

In order to solve the above problems and achieve such an object, the present invention provides a tool body in which a plurality of head members are attached with their side surfaces extending in the longitudinal direction of each other in close contact with each other. A coating tool that discharges a coating liquid from a groove opened at a tip end of the tool body extending along the coating tool and applies the coating solution to an object to be coated. The cutting edge protruding from the front end surface of the head member is provided along each of the side surfaces, the groove is open at the front end of these cutting edge portions, and at least the cutting edge portion of the head member is a cemented carbide. The cutting edge portion is formed of an alloy, and the cutting edge portion is rectangular when viewed in the longitudinal direction, and the amount of protrusion of the cutting 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 10 times or more of 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 an application tool, at least the cutting edge portion of the head member is formed of a high-rigidity cemented carbide having a higher Young's modulus than stainless steel or the like, and the straightness of the cutting edge portion is set to 2 μm / m or less. Therefore, even if the blade width is as thin as about 0.2 mm to 0.5 mm, and the amount of protrusion of the blade tip is up to 20 times the blade width (4.0 mm to 10.0 mm), the film thickness is small. A coating film with small deviation can be formed. Furthermore, the blade tip is rectangular when viewed in the longitudinal direction in which the opening of the groove extends, and the coating solution is spread and applied on the tip end surface of the blade, so even if the depth of the recess is relatively deep, for example, A coating film can be formed to a position very close to 0.1 mm from the wall surface of the recess, and it is possible to reliably form a coating film having a uniform thickness on the bottom surface of such a recess. .

Here, if the protruding amount of the blade tip portion is small, there is a possibility that the coating liquid cannot be uniformly applied to the bottom surface of the deep recess, so that the blade width is set to 10 times or more, preferably 18 times or more. It is said.

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

  Further, among the side surfaces of the plurality of head members that are brought into close contact with each other, one of the side surfaces is formed flat 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 these side surfaces, or a side plate is provided on a side portion of a plurality of head members to form a groove, compared to forming the groove on the entire inner surface of the groove. Thus, the surface roughness can be made uniform over the entire surface of the groove, and the flow rate of the coating solution at both ends of the groove can be prevented from being varied, so that the sagging distance described later can be reduced 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 deviation is uniformly reduced to an extremely close vicinity of the wall surface of the recess evenly. It is 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 the embodiment shown in FIG. 1 from the front end side. It is the side view which looked at the embodiment shown in Drawing 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 the embodiment shown in Drawing 1 thru / or Drawing 5. It is an enlarged view of the C section in FIG. Based on the embodiment shown in FIGS. 1 to 5, the result of measuring the film thickness when a coating film was formed by a coating tool with a protruding amount of the blade edge portion changed along the longitudinal direction in which the opening of the groove extends. It is a figure which shows, (a) As for the result of Example 1 where the protrusion amount is 18 times the blade width, (b) As a result of Example 2 where the protrusion amount is 20 times the blade width, (c) is the protrusion amount 9 shows the result of Comparative Example 1 in which the blade width is 22 times. It is a front view showing the position where the surface roughness of this shim was measured in comparative example 2 which is an application tool using a stainless steel shim for forming a groove. When a coating film is formed by Example 1 based on the embodiment shown in FIGS. 1 to 5 and showing results in FIG. 8A and Comparative Example 2 using a stainless steel shim shown in FIG. 8A and 8B are diagrams showing the results of measuring the film thickness along the longitudinal direction in which the opening of the groove extends, (a) showing the results of Comparative Example 2, and (b) showing the results of Example 1 (FIG. 8 (a)). (Same as the first embodiment).

  1 to 5 show one embodiment of the present invention. In the application tool of the present embodiment, the tool main body 1 is a horizontally long block shape having a longitudinal direction in a lateral direction (left and right directions in FIGS. 1 and 2), and a cross section orthogonal to the longitudinal direction has a vertical direction (FIG. 1). And a pair of head members 2 and 3 having a substantially rectangular shape and a substantially rectangular shape long in the vertical direction (in FIG. 3) are attached by closely contacting the side surfaces 2 a and 3 a extending in the longitudinal direction of each other. Have been.

  The front ends (upper ends in FIGS. 1 and 3) of the side surfaces 2a, 3a of the head members 2, 3 which are brought into close contact with each other, protrude from the front end surfaces 2b, 3b of the head members 2, 3. The cutting edge portions 4 and 5 are provided, respectively, and the grooves 6 for discharging the coating liquid extend in the longitudinal direction on the tip end portions of the tool body 1, that is, on the tip end surfaces 4 a and 5 a of the 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 front end surfaces 4a, 5a, that is, in the longitudinal direction.

  Of the pair of head members 2, 3, one of the head members 2 has a flat surface with the side surface (one side surface) 2 a extending 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 located on the rear end side (the lower side in FIGS. 1 and 3) of the blade edge portion 5 in FIG. As shown in the figure, a manifold 7 having a semi-circular concave groove cross section perpendicular to the longitudinal direction is formed so as to extend in the longitudinal direction, and the center of the manifold 7 in the longitudinal direction is also provided with the other head member 3. The formed application liquid supply hole 7a is connected.

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

  In addition, the cutting 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, the longitudinal direction. It is formed in a rectangular shape. Therefore, the tip surfaces 4a, 5a of the blade portions 4, 5 are flat surfaces that are parallel to and flush with the tip surfaces 2b, 3b of the head members 2, 3, and the outer surfaces 4b of the blade portions 4, 5 facing each other. , 5b have a planar shape perpendicular to these tip surfaces 2b, 3b, 4a, 5a. In addition, as shown in FIG. 1, the cutting edge portions 4 and 5 are not provided at both longitudinal end portions of the head members 2 and 3, but are provided so as to extend in the longitudinal direction only at a central portion therebetween. I have.

  Further, as shown in FIG. 5, the groove surfaces 6a, 6b of the groove 6 and the cutting edge portions 4, 5 in a 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, W5 of the blade tips 4, 5, which are the distances from the outer side surfaces 4b, 5b, are also constant. In the present embodiment, these blade widths W4, W5 are within the range of 0.2 mm to 0.5 mm. The widths are equal to each other. At both ends of the groove 6, the groove 6 is formed so as to be recessed with respect to the side surface 2a of the 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. It is desirable that the distance between the end faces of the blade edge portions 4 and 5 facing outward in the longitudinal direction and the groove wall 6c be 1 mm or less.

At least the cutting edge portions 4 and 5 of the head members 2 and 3 are formed of a cemented carbide, and the protrusion amounts P4 and P5 of the cutting edge portions 4 and 5 from the tip surfaces 2b and 3b of the head members 2 and 3 are as follows. The blade widths W4 and W5 are 10 times or more and 20 times or less, and desirably 18 times or more and 20 times or less of the blade widths W4 and W5 .

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

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

  In the coating tool configured as described above, the tip of the tool body 1 is normally supported downward, and the tip surfaces 4a and 5a of the blades 4 and 5 are, for example, the upper surface of a plate-shaped workpiece (the surface to be coated). ) At an interval, while discharging the coating liquid supplied to the manifold 7 from the supply hole 7a from the groove 6, and in a direction perpendicular to the longitudinal direction in which the opening of the groove 6 extends when viewed from the front end side. The coating liquid is applied by relatively moving the object to be coated. Here, even if the surface to be coated is, for example, the bottom surface of a recess having a rectangular shape in a plan view and the wall surface of the recess exists in the direction of relative movement of the tool body 1, the coating with the above-described configuration is performed. In the tool, since the cutting edges 4 and 5 are rectangular when viewed in the longitudinal direction, the outer surfaces 4b and 5b of the cutting edges 4 and 5 can be brought close to the wall surface.

  Further, in the application tool having the above-described configuration, at least the edge portions 4, 5 of the head members 2, 3 are formed of a cemented carbide having a high Young's modulus, and the straightness of the edge portions 4, 5 is 2 μm / m or less. High accuracy can be maintained. For this reason, the blade widths W4 and W5 are the ultrathin blade tips 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 tips 4 and 5 are determined by the blades. Even when the widths W4 and W5 are at most 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 application tool having the above-described configuration, the edge portions 4 and 5 are inserted into a relatively deep recess, and the groove 6 is positioned very close to the wall surface. A coating film having a small thickness deviation can be formed. Further, since the coating liquid is spread on the tip surfaces 4a and 5a of the blade edge portions 4 and 5 in a direction perpendicular to the longitudinal direction in which the opening of the groove 6 extends, for example, the coating liquid is applied from the wall surface of such a recess. It is possible to reliably form a coating film having a uniform thickness evenly at 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 increases as shown in an embodiment described later. There is a risk of becoming too much.

Here, if the protruding amounts P4, P5 of the cutting edge portions 4, 5 are too small, there is a possibility that the application liquid cannot be applied to the bottom surface of the deep recess as described above. The protrusion amounts P4 and P5 are preferably 10 times or more the blade widths W4 and W5 as in this embodiment, and more preferably 18 times or more .

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

  However, in this regard, for example, the entire head members 2 and 3 can be formed of a 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. On the other hand, in the present embodiment, the head members 2 and 3 other than the cutting edge members 8 and 9 are made of stainless steel as described above. Since it can be formed of a metal material such as steel, screw processing can be facilitated. Further, the cost of the head members 2 and 3 can be reduced.

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

  However, the base ends 8a and 9a of the blade members 8 and 9 are not made to be wider than the blade widths W4 and W5 of the blade portions 4 and 5 as described above, for example, in the above-described embodiment shown in FIGS. As in the modified example, the blade members 8 and 9 are formed in a plate shape having the same width as the blade widths W4 and W5 from the blade portions 4 and 5 to the base ends 8a and 9a. It may be attached to the recesses 2c, 3c having a width corresponding to W5. Note that, in this modified example, the same reference numerals are assigned to portions common to the embodiment shown in FIGS. 1 to 5. According to such a modification, the amount of cemented carbide used can be further reduced, and the cost can be further reduced.

  In the above-described embodiment and its modifications, the side surface 2 a of one of the head members 2, of the side surfaces 2 a, 3 a of the head members 2, 3, which are brought into close contact with each other, is formed in a flat shape up to the tip of the cutting edge 4. At the same time, the groove 6 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 this groove 6 is directly It is open to 5a. Further, the groove surfaces 6a, 6b, the groove walls 6c, and the tips of the cutting edges 4, 5 of the cemented carbide cutting edges 4, 5 of the grooves 6 on the one side surface 2a and the other side surface 3a in such a plane shape. The surfaces 4a and 5a are finished by grinding.

  However, also in this regard, instead of forming the groove 6 on the other side surface 3a to form the groove 6 as described above, the other side surface 3a is also made to be planar, and one of the same planes is formed. It is also possible to form the groove 6 with a shim interposed between the side surface 2a, but in such a case, the groove width W6 is almost the same as the blade width W4, W5. In forming the groove 6, it is difficult to manufacture a shim made of the same cemented carbide as the cutting edge portions 4, 5, and a metal shim such as stainless steel has to be used. However, in this case, such a metal shim is formed by wire cutting or etching of the groove wall or the front end surface in contact with the coating liquid, so that the grooves 6 of the cutting edge portions 4 and 5 finished by grinding. With respect 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.

  In comparison with such a case, according to the above embodiment, the inner surface of the groove 6 including the groove surfaces 6a and 6b and the groove wall 6c and the tip surfaces 4a and 5a of the cutting edge portions 4 and 5 are entirely ground. The surface roughness can be formed to be more uniform, and the variation in the flow rate of the coating liquid at both ends of the groove 6 where the groove wall 6c is located and the tip surfaces 4a and 5a connected to the groove wall 6c can be suppressed to be small. A coating film can be formed. Further, in the above embodiment, since the side surface 2a of the one head member 2 is flat, such grinding can be performed relatively easily.

  In the above embodiment, the case where the coating film is formed using the bottom surface of the recess where the object is formed as the surface to be applied has been described. However, the coating tool having the above-described configuration requires only the bottom surface of such a recess. Alternatively, when a protruding wall or projection is formed adjacent to the surface to be coated, it can be used to form a coating film having a uniform film thickness as close as possible to the protruding wall or projection. . Further, even when used for applying a coating liquid to a flat coating surface of a plate-like coating object, for example, instead of the bottom surface of such a recess or a coating surface on which protruding walls or projections are formed, Of course it doesn't matter.

  Next, the effects of the present invention will be demonstrated with reference to examples of the present invention. In this embodiment, 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, the groove width W6 of the groove 6 is 0.5 mm, and FIG. 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 at the tip end surfaces 4a and 5a of the cutting edge portions 4 and 5a is 70 mm, and the opening of the groove 6 also extends as shown in FIG. A coating tool having a coating width M of 72 mm in the longitudinal direction of the cutting edge portions 4 and 5 has a coating amount of 5.4 mm which is 18 times the blade widths W4 and W5. And a 20-fold 6.0 mm one. These are 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 were equal to those of Examples 1 and 2, and the protrusion amounts of the blade edge portions 4 and 5 were large. An application tool in which P4 and P5 were 6.6 mm, which is 22 times larger than 20 times the blade widths W4 and W5, was also manufactured. Then, the application liquid is applied to the object by the application tools of Examples 1 and 2 and Comparative Example 1, and a measurement distance from one end to the other end of the application film in the direction in which the opening of the groove 6 extends at that time. 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 elastic resin for optics, the viscosity is 5000 to 7000 cps, the target film thickness is 100 μm, and the coating speed (the relative moving speed between the coating tool and the object to be coated) is 0. It was 9 m / min. Further, based on the measurement results of FIGS. 8A to 8C, the portions excluding the portion that shifts to the target film thickness of 100 μm from the painted end at both ends of the measurement distance in each of the drawings are described in Examples 1 and 2, and The maximum value, minimum value, range of film thickness, average value, and Coating Uniformity (Unif) according to Comparative Example 1 were calculated. Note that Coating Uniformity (Unif) is a percentage (%) of (range of film thickness) / (average value × 2), and the smaller the value, the more uniform the film thickness. 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.

8 (a) to 8 (c) and Tables 1 to 3, in Comparative Example 1 in which the protrusion amounts P4, P5 of the blade edge portions 4, 5 are 22 times the blade widths W4, W5, the coating uniformity (Unif ) Was 3.48% or more than 3%, whereas in Example 2 which was 20 times, it was less than 2.52% or 3%, and in Example 1 which was 18 times, it was 1.41% or 3%. %, Which is less than 1.5%, which is half of the%. From this, can overhang P4, P5 of the cutting edge portion 4, 5 to form a coating film having a uniform thickness equal to or less than 20 times the blade width W4, W5, as in the present invention, 18-fold It could be confirmed that if it was, the film thickness could be further uniformed.

  Next, in order to form a groove opening at the tip of the tool main body, the groove surface 6b and the groove wall 6c are formed on the cutting edge 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 in the front end surface 5a, the side surfaces of a pair of head members having a flat side surface 2a up to the front end surface 4a of the blade edge portion 4 similarly to the one head member 2 A coating tool in which a groove was formed by interposing a stainless steel shim S as shown in a front view in FIG. In Comparative Example 2, the blade widths W4 and W5 of the blade portion, the groove width W6 of the groove, the opening width L of the groove, the coating width M of the blade portion, and the protrusion amounts P4 and P5 of the blade portion are the same as those in Example 1. It is.

  First, when the surface roughness of the front end 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 were measured, the arithmetic average roughness in JIS B 0601-2001 was measured. In the height Ra, the tip end 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 application tool of Example 1 is 0.010 μm in the tip surfaces 4a and 5a and 0.06 μm in the arithmetic mean roughness Ra in JIS B0601-2001. 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 those of Examples 1 and 2 and Comparative Example 1, and one end of the coating film in the direction in which the opening of the groove extends at that time. The film thickness (μm) is measured with respect to the measurement distance (mm) to the other end, and based on this, the maximum value, minimum value, range of film thickness, average value, and Coating Uniformity (Unif) are further calculated. The sagging distance between both ends of the coating film in the direction in which the opening of the groove extends (the 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. Therefore, the maximum value, minimum value, range of film thickness, average value, and coating uniformity (Unif) of FIG. 10B and Table 5 which are the results of Example 1 are shown in FIG. be equivalent to.

  From the results shown in FIGS. 10A and 10B and Tables 4 and 5, in the application tool of Comparative Example 2, the sag distance was as long as 1.16 mm, and the coating uniformity (Unif) was also 5.09%, which was described above. In addition to Example 2, it was larger than Comparative Example 1, and the deviation of the film thickness was remarkable. On the other hand, in the first embodiment, not only the Coating Uniformity (Unif) is kept small as described above, but also the sag distance is 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 it is possible to form a wider and uniform coating film 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 deviation is uniformly reduced to an extremely close vicinity of the wall surface of the recess evenly. It is possible to reliably form a coating film having a thickness.

DESCRIPTION OF SYMBOLS 1 Tool main body 2, 3 Head member 2a, 3a Side surface 2b, 3b of head members 2, 3 which are brought into close contact with each other 2c, 3c Tip surface 2c, 3c Concave part 4, 5 Blade tip 4a, 5a Blade tip 4, 5 4b, 5b Outer side surfaces of the blade portions 4, 5 6 Grooves 6a, 6b Groove surfaces 6c Groove walls 7 Manifolds 8, 9 Blade members 8a, 9a Base end portions of the blade members 8, 9 10 Clamp bolts W4, W5 Blade edges Blade width of the portions 4, 5 P4, P5 Projection amount of the blade portions 4, 5 W6 Groove width of the groove 6 L Opening width of the groove 6 M Coating width of the blade portions 4, 5

Claims (5)

A tool body is formed by attaching a plurality of head members with their side surfaces extending in the longitudinal direction in close contact with each other, and a coating liquid is discharged from a groove opened along the side surface and opened at a tip end of the tool body. An application tool for applying to an application object,
At the tips of the side surfaces of the plurality of head members that are brought into close contact with each other, blade tips protruding from the tip surfaces of the head members are provided along the side surfaces, respectively, and the grooves are formed at the tips of these blade tips. Open to the
At least the cutting edge of the head member is formed of a cemented carbide,
This cutting edge is rectangular when viewed in the longitudinal direction,
The cutting edge in which the amount of protrusion of the cutting edge portion from the tip end surface of the head member is the 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 end side. An application tool characterized in that the width is not less than 10 times and not more than 20 times the blade width of the portion. 2. The application tool according to claim 1, wherein an amount of protrusion of the blade tip portion is 18 times or more and 20 times or less of the blade width. 3. A concave portion is formed along the longitudinal direction at a tip 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 formed of a cemented carbide cutting edge member attached to the concave portion. The application tool according to claim 1 , wherein the application tool is provided on a tip side. The application tool according to claim 3 , wherein the blade edge member has a base end portion having a width larger than the blade width and attached to the concave portion. 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 flat shape up to the tip of the blade edge portion, and the other side surface has the groove recessed with respect to the one side surface. The coating tool according to any one of claims 1 to 4 , wherein the coating tool is formed.

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