Application head

Abstract

0. To provide a coating head in which distortion, twisting, or the like hardly occurs in a cemented carbide member and a uniform coating film can be formed even in the case of a long head member longer than 5m to 2m.SOLUTION: A pair of slender plate-shaped head members 11 and a pair of lip parts 12 fixed to one side edge 22a of each head member 11 so as to be extended from one end to the other end are provided. Each head member 11 has a notched part side 11a formed with a prescribed step from one end to the other end along one side edge side 11b, and a plurality of fitting hole side 11b provided side by side along one side edge side 11c on a step surface side 11a of the notched part side 11d. Each lip part 12 has an elongated rectangular plate-shaped superhard member 31 provided so as to be attached to the 11b of the cutout part of the head member 11, and a plurality of fitting members 32 provided side by side from one end to the other end along the length direction of the superhard member 31 so as to be fitted to the 11d of each fitting hole.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a coating head. [Background technology]

[0002] For example, when manufacturing liquid crystal substrates, magnetic tapes, etc., a coating device equipped with a coating head that discharges a coating liquid in the form of a film is used to form a coating film of a liquid crystal material, a magnetic material, etc. on the surface of a substrate, a strip-shaped member, etc. A conventional coating head has, for example, a pair of elongated, plate-like head members and a pair of lip portions provided on one side edge along the length of each head member so as to extend from one end to the other end of each head member, and is configured to discharge the coating liquid in the form of a film from a slit between the lip portions with each head member fixed so that the lip portions face each other at a predetermined interval (see, for example, Patent Documents 1 to 3).

[0003] Furthermore, in conventional application heads, each lip portion has a flat, plate-shaped superhard member and a fixing member provided on one surface of the superhard member along the length of the superhard member; each lip portion is arranged on each head member so that the superhard member is located on the slit side and the fixing member is located on the opposite side; and each lip portion is fixed to each head member by screwing a bolt into the fixing member from the back side of each head member opposite the slit (see, for example, Patent Documents 1 to 3). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-143965 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-178790 [Patent Document 3] Japanese Patent Application Laid-Open No. 2006-181453 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventionally, substrates or strip-shaped members on which a coating film is formed have lengths generally within about 0.5 m to 2 m, and therefore, even with conventional coating heads such as those described in Patent Documents 1 to 3, distortion or twisting of the superhard member fixed to the head member has been difficult to occur, and a uniform coating film has been formed. However, in recent years, for example, when coating liquid crystal materials, it has become necessary to form a coating film on substrates longer than 0.5 m to 2 m. As a result, the head member and superhard member of the coating head must be elongated to match the length of the substrate. However, with the structures of conventional coating heads such as those described in Patent Documents 1 to 3, distortion or twisting of the superhard member occurs, making it difficult to form a uniform coating film.

[0006] The present invention has been made in light of these problems, and aims to provide a coating head that is less likely to cause distortion or twisting in the superhard member, even in the case of a head member that is longer than 0.5 m to 2 m, and that can form a uniform coating film. [Means for solving the problem]

[0007] In order to achieve the above object, the coating head according to the present invention comprises a pair of elongated plate-shaped head members, and a pair of lip portions fixed to one side edge along the length of each head member so as to extend from one end of each head member to the other end, and in a state in which the head members are fixed so that the lip portions face each other at a predetermined interval, the coating head discharges a coating liquid in the form of a film from between the lip portions to form a coating film on an object, and each head member has a notch formed in one surface at a predetermined step from one end to the other end along one side edge. and a plurality of fitting holes provided in a line at intervals along one side edge on a step surface parallel to one surface of the cutout portion, wherein each lip portion comprises a long, thin rectangular plate-shaped superhard member provided so as to be attachable to the cutout portion of the corresponding head member, and a plurality of fitting members provided in a line at intervals from one end to the other along the length of the superhard member on a surface of the superhard member facing the step surface so as to be fitable into each fitting hole when the superhard member is attached to the cutout portion.

[0008] In the application head according to the present invention, when each lip portion is fixed to a corresponding head member, a plurality of fitting members arranged at intervals on the surface of the superhard member are fitted into a plurality of fitting holes provided in the stepped surfaces of the cutouts of each head member. This prevents the superhard member from shifting forward, backward, left, or right, or from twisting, compared to conventional head members that fix the superhard member to the head member using a fixing member provided on one surface of the superhard member along its length. Therefore, even when the head member is longer than 0.5 m to 2 m, the superhard member is less likely to be distorted or twisted when fixed. This also enables the formation of a uniform coating film of liquid crystal material on a substrate longer than 0.5 m to 2 m.

[0009] The coating head according to the present invention is particularly effective when each head member and each lip portion is, for example, 5 m or less. In the coating head according to the present invention, the fitting member may be made of any material that does not deform due to temperature changes or loads when forming a coating film, such as nickel.

[0010] In the application head according to the present invention, each head member preferably has a plurality of threaded holes extending from the other surface side to the corresponding fitting holes, and a plurality of fixing screws threadably engageable with the respective threaded holes. Each lip portion is preferably configured to be fixable to the corresponding head member by fastening the fitting members fitted into the corresponding fitting holes of the head member with the respective fixing screws threaded into the respective screw holes. In this case, by fixing each fitting member to each head member with each fixing screw, each superhard member can be fixed to each head member at multiple locations on the superhard member. This allows each superhard member to be reliably fixed to each head member and more effectively prevents distortion, twisting, and the like of the superhard member. Preferably, each fixing screw extends from the corresponding threaded hole to each fitting hole, and its tip threads into each fitting member to fix the fitting member. Furthermore, it is preferable that each screw hole is arranged to extend in a plane perpendicular to the longitudinal direction of each head member and obliquely relative to the step surface of the cutout portion of each head member, and that each fixing screw is threadedly engaged with and fixed to the corresponding screw hole and each fitting member along the extension direction of the screw hole.

[0011] In the application head according to the present invention, for example, each fitting hole may have a cross section parallel to the stepped surface that is a polygon, such as a rectangle, and each fitting member may have a cross section parallel to the surface of the superhard member facing the stepped surface that is a polygon, such as a rectangle, that can fit into the corresponding fitting hole. In this case, by making the fitting holes and fitting members each have a cross section that is a polygon, such as a rectangle, when the fitting members are fitted into the fitting holes, the superhard members are less likely to shift in their fixed positions relative to the head members when the fitting members are fitted into the fitting holes, compared to when the fitting members are circular or elliptical. Furthermore, while a single fitting hole and a single fitting member can make it difficult for the superhard members to shift in their fixed positions relative to the head members, having multiple fitting holes and multiple fitting members can almost certainly prevent the superhard members from shifting in their fixed positions relative to the head members.

[0012] In the application head according to the present invention, when each lip portion is fixed to a corresponding head member, a gap is formed between each corresponding fitting member and each fitting hole, and between the superhard member and the stepped surface, and each gap is preferably arranged so as to be in communication from one end to the other end of each head member. In this case, when each component of the application head is manufactured or assembled, grinding debris remaining between each head member and the corresponding lip portion can be cleaned through each gap, and cleaning fluid or grinding fluid remaining between each head member and the corresponding lip portion during cleaning can be discharged through each gap, and each gap can be dried after discharge. Each gap only needs to be in communication from one end to the other end of each head member. It is not necessary for the entire space between each corresponding fitting member and each fitting hole, or the entire space between the superhard member and the stepped surface, to be a gap; only a portion of each space may be a gap. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a coating head that is less likely to cause distortion or twisting in the superhard member even in a head member that is longer than 0.5 m to 2 m, and that can form a uniform coating film. [Brief explanation of the drawings]

[0014] [Figure 1] (a) A plan view of a head member (tailing head) of an application head according to an embodiment of the present invention, (b) an enlarged plan view of the end of (a), (c) a cross-sectional view (cross-sectional view along line A-A') at a position where there is no fitting hole, and (d) a cross-sectional view (cross-sectional view along line B-B') at a position where there is a fitting hole. [Figure 2] 1A is a rear view of a lip portion of a coating head according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view (cross-sectional view taken along line CC') at a position where a fitting member is provided. [Figure 3](a) A cross-sectional view of an application head according to an embodiment of the present invention, showing a position where a fitting hole and a fitting member are present when a lip portion is attached to a head member (leading head), (b) a cross-sectional view of a position where a fitting hole and a fitting member are not present, and (c) a cross-sectional view of a position where a lip portion is attached to a head member (tailing head) and a fitting hole and a fitting member are present. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 3 show a coating head according to an embodiment of the present invention. As shown in FIGS. 1 to 3, the application head has a pair of head members 11 and a pair of lip portions 12.

[0016] As shown in FIG. 1, a pair of head members 11 are made of stainless steel, one being a tailing head and the other a leading head. Note that FIG. 1 shows the tailing head. As shown in FIGS. 1(c) and 1(d), each head member 11 is a thin, elongated rectangular plate, with one side surface 21a forming an inclined surface 11a. As a result, in a cross section perpendicular to the longitudinal direction of each head member 11, the apex along one side edge 22a of one side surface 21a is formed at an acute angle. FIG. 1 shows a specific example.

[0017] As shown in FIG. 1, each head member 11 has a notch 11b formed in one surface 23a along one side edge 22a, with a predetermined step extending from one end to the other. The notch 11b has a stepped surface 11c parallel to the surface 23a. Each head member 11 has a plurality of fitting holes 11d arranged in the stepped surface 11c at intervals along one side edge 22a from one end to the other. As shown in FIGS. 1(a), 1(b), and 1(d), the fitting holes 11d are arranged in a row on the side opposite the stepped surface 11c from the one side edge 22a. As shown in FIG. 1(b), each fitting hole 11d has a generally rectangular cross section parallel to the stepped surface 11c, with four corners of the cross section formed in an arc shape. All fitting holes 11d are the same size and have a predetermined depth, as shown in FIG. 1(d). In the specific example shown in FIG. 1, there are 40 fitting holes 11a.

[0018] As shown in FIG. 1(c), each head member 11 has a gap groove 11e formed in the portion between each fitting hole 11d of the step surface 11c, slightly deeper than the other portion of the step surface 11c (the portion on the side of one side edge 22a) and arranged to connect each fitting hole 11d.

[0019] 1(d), each head member 11 has a plurality of screw holes 11f that correspond to the fitting holes 11d and penetrate from the other surface 23b to the fitting holes 11d. Each screw hole 11f is formed in a plane perpendicular to the longitudinal direction of the head member 11, extending along the inclined surface 11a and obliquely relative to the stepped surface 11c of the head member 11. Each head member 11 has a plurality of fixing screws 11g that are threadably engageable with the screw holes 11f, as shown in FIGS. 3(a) and 3(c).

[0020] As shown in FIG. 2, each of the pair of lip portions 12 has a superhard member 31 and multiple fitting members 32. The superhard member 31 is made of cemented carbide and has the shape of a long, narrow rectangular plate. The superhard member 31 has approximately the same length as each head member 11, the same width as the stepped surface 11c, and the same thickness as the step of the notched portion 11b. As shown in FIG. 2(b), the superhard member 31 has an attachment groove 31a on one surface 41a, on one side surface 42a side, which extends from one end to the other end with a predetermined width from one side surface 42a.

[0021] 2, the fitting members 32 are made of nickel and are attached in a line at intervals from one end to the other along the length of the superhard member 31. The fitting members 32 are attached to the mounting grooves 31a of the superhard member 31 at intervals that match the intervals between the fitting holes 11d of the head members 11. Each fitting member 32 has a base portion 32a and a protruding portion 32b.

[0022] The base portion 32a is shaped like a rectangular plate, and has a width and thickness that allow it to fit snugly into the mounting groove 31a of the superhard member 31. The protrusion 32b is provided on one surface of the base portion 32a, and when the base portion 32a is attached to the mounting groove 31a, it is provided so as to protrude from one surface 41a of the superhard member 31 at a position close to one side surface 42a of the superhard member 31. The cross section of the protrusion 32b parallel to one surface of the base portion 32a (one surface 41a of the superhard member 31) is roughly rectangular, and each corner is chamfered. The protrusion 32b has a length and width slightly smaller than the length and width of each fitting hole 11d and a height slightly shorter than the depth of each fitting hole 11d, and is provided so as to be able to fit into each fitting hole 11d. Each fitting member 32 is attached to the superhard member 31 by fixing the base portion 32a to the attachment groove 31a by brazing. In the specific example shown in Fig. 2, there are 40 protrusions 32b.

[0023] As shown in FIG. 3 , each lip portion 12 is attached to the notch 11b of the corresponding head member 11. With one surface 41a of the superhard member 31 facing the stepped surface 11c of the corresponding head member 11, each lip portion 12 is attached to the corresponding head member 11 by fitting the protrusion 32b of each fitting member 32 into the corresponding fitting hole 11d. Also, as shown in FIGS. 3( a) and 3(c), each lip portion 12 is fixed to the corresponding head member 11 by threading the tip of each fixing screw 11g threaded into each screw hole 11f into each fitting member 32 fitted into the fitting hole 11d of the corresponding head member 11. Thus, each lip portion 12 is fixed to one side edge 22a along the longitudinal direction of the corresponding head member 11 so as to extend from one end to the other end of the head member 11.

[0024] 3(a) and 3(c), the coating head is configured so that, when each lip portion 12 is fixed to the corresponding head member 11, a gap is formed between each corresponding protrusion 32b of the fitting member 32 and each fitting hole 11d. Also, as shown in FIG. 3(b), the coating head is configured so that a gap is formed between each of the superhard members 31 and the stepped surface 11c by the gap groove 11e and the mounting groove 31a. The coating head is configured so that each gap is connected from one end to the other end of each head member 11.

[0025] 3, the coating head is configured so that when each lip portion 12 is fixed to the corresponding head member 11, one surface 23a of each head member 11 and the other surface 41b of the superhard member 31 form a continuous plane. Furthermore, when each lip portion 12 is fixed to the corresponding head member 11, the other side surface 42b of the superhard member 31 is beveled so that the inclined surface 11a of each head member 11 forms a continuous plane. Furthermore, the coating head is configured so that each lip portion 12 faces each other at a predetermined interval. This allows the coating head to eject a coating liquid in the form of a film from between each lip portion 12 to form a coating film on an object.

[0026] Next, the operation will be described. When the application head secures each lip portion 12 to the corresponding head member 11, multiple fitting members 32 arranged at intervals on the surface of the superhard member 31 are fitted into multiple fitting holes 11d on the stepped surface 11c of the cutout portion 11b of each head member 11. This prevents the superhard member 31 from shifting forward, backward, left, or right, or twisting, compared to conventional head members that secure the superhard member to the head member using a fixing member arranged on one surface of the superhard member along its length. Therefore, even for head members 11 longer than 0.5 m to 2 m, the superhard member 31 is less likely to be distorted or twisted when secured. This also enables the formation of a uniform coating of liquid crystal material on substrates longer than 0.5 m to 2 m. The application head is particularly effective when each head member 11 and each lip portion 12 is, for example, 5 m or less in length.

[0027] In the application head, the fitting holes 11d and the fitting members 32 have a generally rectangular cross section, so that when the fitting members 32 are fitted into the fitting holes 11d, the fixed positions of the superhard members 31 relative to the head members 11 are less likely to shift compared to when the fitting holes 11d and the fitting members 32 are circular or elliptical. Also, because there are a plurality of fitting holes 11d and fitting members 32, the fixed positions of the superhard members 31 relative to the head members 11 are almost certainly not shifted.

[0028] Furthermore, by fixing each fitting member 32 to each head member 11 with each fixing screw 11g, the superhard member 31 can be fixed to each head member 11 at multiple locations on each superhard member 31. This allows each superhard member 31 to be reliably fixed to each head member 11, and more effectively prevents distortion or twisting of the superhard member 31. Furthermore, because the fitting members 32 are made of nickel, the application head is less likely to deform due to temperature changes or loads that occur when forming a coating film.

[0029] Since each gap in the coating head is connected from one end to the other, when manufacturing or assembling each component of the coating head, grinding chips remaining between each head component 11 and the corresponding lip portion 12 can be washed through each gap, and cleaning fluid or grinding fluid remaining between each head component 11 and the corresponding lip portion 12 during cleaning can be discharged through each gap, and each gap can be dried after being discharged. [Explanation of symbols]

[0030] 11 Head member 21a One side 22a One side edge 23a One surface 23b Other surface 11a Slope 11b Notch 11c Step surface 11d Fitting hole 11e Groove for void 11f screw hole 11g fixing screw 12 Lip 31 Superhard materials 41a One surface 41b Other surface 42a One side 42b The other side 31a Mounting groove 32 Fitting member 32a Base part 32b Protrusion

Claims

1. A coating head having a pair of elongated plate-like head members and a pair of lip portions fixed to one side edge along the length of each head member so as to extend from one end of each head member to the other end, wherein the head members are fixed so that the lip portions face each other at a predetermined interval, and the coating head discharges a coating liquid in the form of a film from between the lip portions to form a coating film on an object, Each head member has a notch formed on one surface along one side edge from one end to the other end with a predetermined step, and a plurality of fitting holes provided in a step surface parallel to the one surface of the notch and aligned at intervals along the one side edge, Each lip portion has a long, narrow rectangular plate-shaped superhard member that is provided so as to be attachable to the notch of the corresponding head member, and a plurality of fitting members that are provided side by side at intervals from one end to the other end along the length of the superhard member on a surface of the superhard member that faces the stepped surface so as to be fitable into each fitting hole when the superhard member is attached to the notch. Distributed application head.

2. Each head member has a plurality of screw holes provided corresponding to each fitting hole, penetrating from the other surface side to each fitting hole, and a plurality of fixing screws provided so as to be threadably engaged with each screw hole, Each lip portion is provided so as to be fixable to the corresponding head member by fixing each fitting member fitted into each fitting hole of the corresponding head member with each fixing screw threaded into each screw hole, 2. The coating head according to claim 1.

3. Each fitting hole has a generally rectangular cross section parallel to the step surface, Each fitting member has a substantially rectangular cross section parallel to a surface of the superhard member facing the stepped surface.

3. The coating head according to claim 1 or 2.

4. 2. The coating head according to claim 1, wherein when each lip portion is fixed to a corresponding head member, there is a gap between each corresponding fitting member and each fitting hole, and between the superhard member and the step surface, and each gap is arranged to communicate from one end to the other end of each head member.

Images