JP2006181453A - Coating head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating head for formation of a coating film on the target surface which has an improved stability of coating performance. <P>SOLUTION: A lip 22 is mounted so as to contact two mutually intersected planes 20 and 21 of a recessed part formed in the edge part of a head member 10 and extended in the longitudinal direction. A part of the lip 22 surrounded by the two planes 20 and 21 is formed with a fixing member 24 in which a bolt 25 is engaged, and the other part is composed of a super-hard member 23. The axial direction of the bolt 25 intersects with the two planes 20 and 21. Since the super-hard member 23 is pressed against the two planes 20 and 21 of the head member 10 by arranging the bolt 25 at such an angle as to impart a force pressing the lip 22 against the two planes 20 and 21 through the tensile force of the bolt 25, the occurrence of a clearance between the lip 22 and the head member 10 can be controlled, leading to an improvement in the stability of coating performance. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an application head that forms a coating film on the surface of an object.

  For example, in the manufacturing process of liquid crystal substrates, magnetic tapes, vinyl sheets, foam sheets, etc., a coating film such as a liquid crystal material, a magnetic material, a coating liquid, and a molten resin is formed on the surface of an object such as a substrate or a strip. There is a process. For the formation of such a coating film, a coating apparatus provided with a coating head that discharges the coating liquid into a film is used.

  As described in Patent Document 1, for example, the coating head holds the lips provided in parallel along the longitudinal edges of the plurality of head members in parallel, and discharges the coating liquid from slits formed between the lips. It is formed to do. And a coating film is formed by making a lip approach or contact the surface of a target object, and moving relatively.

  Here, the lip described in Patent Document 1 is formed of a flat carbide member, and is accommodated in a step portion having a rectangular cross section formed on a side edge portion in the longitudinal direction of the head member. That is, the side surface of the flat plate of the lip is brought into contact with one surface of the step portion and the flat surface of the lip is brought into contact with the other surface. In addition, when fixing a lip to a head member, generally, a cemented carbide member is difficult to process a tapped hole, etc., so a fixing member in which a tapped hole is formed is fixed to the flat surface of the lip, and a space for storing this fixing member. Is formed on the head member on the back surface of the stepped portion, and the lip is pulled and fixed in a direction orthogonal to the flat plate surface by a bolt.

JP 2003-136006 A (page 2-3, FIG. 1-2)

  However, since the coating head described in Patent Document 1 is fixed to the head member by pulling the lip in a direction perpendicular to the flat plate surface, the force for pressing the side surface of the lip against the head member does not act. Therefore, when the lip expands and contracts due to the temperature of the coating liquid, etc., a gap is gradually formed between the lip side surface and the head member, and as a result, the position of the lip tip facing the application surface is shifted from the design position, The flow of the coating liquid inside the slit may be disturbed, and there is a possibility that good formation of the coating film may be hindered.

  An object of the present invention is to improve the stability of coating performance.

  In order to solve the above-described problems, the coating head of the present invention forms a slit that holds the lips provided in parallel along the longitudinal edges of the plurality of head members in parallel and distributes the coating liquid between the lips. The lip is mounted in contact with the two intersecting surfaces of the recess formed by extending in the longitudinal direction at the edge of the head member, and is attached to one end surface of the top side, the leg side, or the top side. A part of the lip surrounded by the extension surface and the extension surface of the end surface of the leg side is formed by a member screwed with a bolt, the other part is formed by a cemented carbide member, and the bolt intersects the two axial directions. And an angle that provides a force for pressing the lip against the two surfaces of the recess by the tensile force of the bolt.

  According to this, the lip is pressed against two intersecting surfaces of the concave portion of the head member by the tensile force of the bolt. Therefore, even if the lip extends hot, the lip is not displaced relative to the head member. As a result, the position of the tip of the lip is not deviated from the designed position, and there is no step or gap in the wall surface that forms the slit and the flow of the coating liquid is not disturbed, improving the stability of the coating performance. it can. In particular, by forming the cemented carbide member forming the lip and the member to which the bolt is screwed together, it is possible to suppress the lip from being bent by the tensile force of the bolt. This can be further improved.

  By the way, in general, there are two types of coating heads, one having two lips and forming one type of coating film, and the other having three or more lips and forming a plurality of types of coating layers. .

  For example, two types of lips or three or more types of outer lips are formed with a cemented carbide member whose longitudinal section is formed in a T shape, and the top of the T shape is A surface forming a slit, one end surface of the T-shaped top side and an end surface of the T-shaped leg side are arranged in contact with the two surfaces of the concave portion of the head member, and A member can be provided in which a bolt is screwed in a region surrounded by the leg side, and this member is fixed to a cemented carbide member.

  In the case of three or more types, a lip called a central lip is arranged between the outer lips. Such a central lip is formed in a substantially rhombus whose longitudinal section is symmetrical, and two adjacent sides of the rhombus are surfaces forming slits. Further, the other two sides of the approximately rhombus are brought into contact with two intersecting surfaces of a recess formed by extending the edge of the central head member in the longitudinal direction, and a part of the lip surrounded by the two surfaces is bolted Can be formed by a member to be screwed, and other parts can be formed by a cemented carbide member. Even in this case, the application performance can be stabilized by crossing the axial direction of the bolt with the two surfaces of the concave portion intersecting each other and at an angle that gives the force to press the central lip against the two surfaces of the concave portion by the tensile force of the bolt. The effect of improving the property is obtained.

  According to the present invention, the stability of coating performance can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a front view in which a part of a coating head according to an embodiment of the present invention is broken, and is a diagram showing a broken section taken along line II in FIG. FIG. 2 is a perspective view of a coating head according to an embodiment of the present invention, and FIG. 3 is an enlarged view of a tip portion of the coating head of FIG.

  As shown in FIG. 2, the coating apparatus to which the coating head according to the present invention is applied includes a coating head, a supply device that supplies the coating liquid to the liquid reservoir chamber 3 of the coating head, and a coating target on the tip side of the coating head. It is configured to include a transfer device that makes the base material 5 that is a thing abut or approach, and that relatively feeds it in the coating direction indicated by the arrow 7 in the drawing.

  As shown in FIG. 1, the coating head includes a front head member 10 and a rear head member 11. Although not shown, closing plates for closing the slit 18 and the end of the liquid reservoir chamber 3 are provided at both longitudinal ends of the front head member 10 and the rear head member 11. The front head member 10 and the rear head member 11 are arranged in parallel in the longitudinal direction, and are integrally connected by, for example, a plurality of bolts. As shown in FIG. 2, these head members 10 and 11 are arranged with the tip side facing the base material 5 and the longitudinal direction orthogonal to the coating direction 7. The rear head member 11 is provided with a groove 15 extending in the longitudinal direction on a contact surface that contacts the front head member 10. The liquid reservoir chamber 3 is formed by the groove 15. The abutting surface of the rear head member 11 is formed by retreating one step from the groove 15 toward the front end side, whereby a slit wall surface 14 is formed. In addition, a slit wall surface 13 is formed at a position facing the slit wall surface 14 of the front head member 10, and a slit 18 communicating with the liquid storage chamber 3 is formed between the slit wall surfaces 13 and 14. . In addition, the outer surface corresponding to the surface opposite to the surface where the front head member 10 and the rear head member 11 are in contact with each other has a shape cut obliquely from the middle toward the tip side of the coating head. As a result, the longitudinal section of the coating head is wedge-shaped.

  Next, the lip of the coating head and the fixing of the lip, which is a characteristic part of the present embodiment, will be described with reference to FIGS. The front head member 10 has a recess formed by extending in the longitudinal direction at an edge portion on the front end side. This recess is formed by cutting the slit wall surface 13 from the middle to the tip side, thereby forming two surfaces 20 and 21 extending in the longitudinal direction. One surface 20 is formed in parallel to the slit wall surface 13, and the other surface 21 is formed to intersect the surface 20 perpendicularly. A lip 22 is attached to these surfaces 20 and 21 in contact therewith. In other words, the lip 22 has a surface that abuts against the surfaces 20 and 21. A part surrounded by the two surfaces 20 and 21 of the lip 22, in other words, a part of the part contacting the surfaces 20 and 21 of the lip 22 is formed by the fixing member 24, and the other part is formed by the cemented carbide member 23. Yes. Further, the super hard member 23 and the fixing member 24 are formed flush with each other. Specifically, the cemented carbide member 23 has a T-shaped cross section in the longitudinal direction, and the top of the T-shape is flush with the extension line of the slit wall surface 13 as the surface forming the slit 18. Is formed. One end surface of the top side of the T-shaped cemented carbide member 23 is in contact with the surface 21, and the end surface of the leg side is in contact with the surface 20. The other end face of the top side faces the base material 5. The fixing member 24 is housed and provided in the entire region surrounded by the top side, the leg side, the extended surface of one end surface of the top side of the T-shaped carbide member 23, and the extended surface of the end surface of the leg side. ing. The fixing member 24 is fixed to the cemented carbide member 23 by brazing, for example. Such a fixing member 24 is formed of a material such as iron that is softer than the cemented carbide member 23, and is provided with a tap hole into which the bolt 25 is screwed.

  On the other hand, the front head member 10 is provided with a through hole that reaches the recess from the outer surface. The bolt 25 is inserted through the through hole, and the tip of the bolt 25 is screwed into the tap hole of the fixing member 24. Thereby, the cemented carbide member 23 is pressed against the concave portion by screwing the bolt 25 and pulling the fixing member 24. In this case, in this embodiment, the axial direction of the bolt 25 intersects the two surfaces 20, 21 of the recess of the front head member 10, and the carbide member 23 is made into the surface 20 and the surface 21 by the tensile force of the bolt 25. It is provided at an angle that gives a pressing force.

  Thus, according to the present embodiment, as shown in FIG. 3, the cemented carbide member 23 of the lip 22 is moved in the directions of the arrows 26 and 27, that is, the two surfaces of the concave portion of the front head member 10 by fastening the bolt 25. 20 and 21 are pressed.

  Further, since the cemented carbide member 23 and the fixing member 24 are formed flush with each other, the fixing member 24 contacts the surfaces 20 and 21 of the front head member 10 together with the cemented carbide member 23. Therefore, in addition to the effect of pressing the lip 22 against the two surfaces 20 and 21, it is possible to suppress the lip 22 from being bent by the tensile force of the bolt 25.

  Therefore, even if the lip 22 extends hot, the fixing member 24 is not displaced relative to the cemented carbide member 23. As a result, the position of the tip of the lip 22 is not deviated from the designed position, and there is no step or gap in the slit wall surface 13 forming the slit 18 so that the flow of the coating liquid is not disturbed. Can be improved.

  Further, the cemented carbide member 23 and the fixing member 24 are fixed to each other by forming the section of the carbide member 23 in a T shape and fixing the fixing member 24 to a region surrounded by two sides of the T shape. High rigidity can be obtained because a relatively large area is obtained.

  In the present embodiment, the front head member 10 has been described, but the rear head member 11 is configured similarly. In addition, the part comprised similarly to the front head member 10 attaches | subjects the same code | symbol, and abbreviate | omits description. In this embodiment, the example in which the groove 15 is provided in the rear head member 11 has been described. However, the groove 15 may be provided in the front head member 10, and the groove 15 may be provided in both the front head member 10 and the rear head member 11. May be provided.

  In the present embodiment, the surface 20 is formed parallel to the slit wall surface 13 and the surface 21 is formed so as to intersect the surface 20 perpendicularly. However, the present invention is not limited to this, and the surfaces 20 and 21 are appropriately angled. Can be formed.

  Next, a modified example of the present embodiment will be described with reference to FIGS. In the embodiment shown in FIG. 1, the configuration in which one slit 18 is formed by the front lip member 10 and the rear lip member 11 has been described. The present invention is not limited to this, and can also be applied to a coating head in which two or more slits are formed by sandwiching a central lip member between a front lip member and a rear lip member. In addition, the same code | symbol is attached | subjected to the structure similar to embodiment shown in FIG. 1, and description is abbreviate | omitted.

  As shown in FIG. 4, the coating head of this embodiment is configured by sequentially arranging a front head member 30, a central head member 31, and a rear head member 32 in the coating direction 7. A front lip 40, a central lip 50, and a rear lip 60 are attached along the longitudinal edge of each head member, and slits 70 and 71 through which the coating liquid flows are formed between the lips. .

  The front head member 30 is provided with a groove 33 extending in the longitudinal direction on a contact surface that contacts the central head member 31. The rear head member 32 is similarly provided with a groove 34, and the liquid reservoir chambers 3a and 3b are formed by the grooves 33 and 34, respectively. The contact surfaces of the front head member 30 and the rear head member 32 are formed by retreating one step from the grooves 33 and 34 to the front end side, thereby forming slit wall surfaces 35 and 36, and the central head member 31 is similarly formed. Slit wall surfaces 37 and 38 are formed. In this manner, a slit 70 communicating with the liquid reservoir 3a is formed between the slit wall surfaces 35 and 37, and a slit 71 communicating with the liquid reservoir 3b is formed between the slit wall surfaces 36 and 38. . Further, outer surfaces corresponding to surfaces opposite to the surfaces of the front head member 30 and the rear head member 32 that are in contact with the central head member 31 are cut off obliquely from the middle toward the tip side of the coating head.

  The front head member 30 has a recess formed by extending in the longitudinal direction at an edge portion on the front end side. The recess is formed by cutting the slit wall surface 35 from the middle to the tip side, thereby forming two surfaces 41 and 42 extending in the longitudinal direction. One surface 41 is formed in parallel to the slit wall surface 35, and the other surface 42 is formed to intersect the surface 41 perpendicularly. A front lip 40 is brought into contact with these surfaces 41 and 42 so as to be mounted. That is, the front lip 40 is configured to have a surface that abuts against the surfaces 41 and 42. A part surrounded by the two surfaces 41 and 42 of the front lip 40, in other words, a part of the part contacting the surfaces 41 and 42 of the front lip 40 is formed by the fixing member 44, and the other part is formed by the cemented carbide member 43. Has been. Further, the super hard member 43 and the fixing member 44 are formed flush with each other. Specifically, the cemented carbide member 43 has a T-shaped cross section in the longitudinal direction, and the top side of the T-shaped cemented carbide member 43 is an extension line of the slit wall surface 35 as a surface forming the slit 70. It is formed to be flush with each other. One end surface of the top side is in contact with the surface 42, and the end surface of the leg side is in contact with the surface 41. Further, the other end surface of the top side is opposed to the base material 5. The fixing member 44 is provided so as to be accommodated in the entire region surrounded by the top side, the leg side, the extended surface of one end surface of the top side of the T-shaped carbide member 43, and the extended surface of the end surface of the leg side. ing. The fixing member 44 is fixed to the cemented carbide member 43 by brazing, for example. Such a fixing member 44 is formed of a material such as iron that is softer than the cemented carbide member 43, and is provided with a tap hole into which the bolt 45 is screwed.

  Further, the front head member 30 is provided with a through hole that reaches the recess from the outer surface. The bolt 45 is provided by being inserted through the through hole, and the tip of the bolt 45 is screwed into the tap hole of the fixing member 44. Accordingly, the carbide member 43 is pressed against the concave portion by screwing the bolt 45 and pulling the fixing member 44. In this case, in this embodiment, the axial direction of the bolt 45 intersects the two surfaces 41 and 42 of the concave portion of the front head member 30, and the carbide member 43 is made into the surface 41 and the surface 42 by the tensile force of the bolt 45. It is provided at an angle that gives a pressing force. According to this, by fastening the bolt 45, the carbide member 43 of the front lip 40 is pressed against the directions of the arrows 46 and 47, that is, the two surfaces 41 and 42 of the concave portion of the front head member 30.

  On the other hand, in the rear head member 32, a concave portion is formed by extending in the longitudinal direction at the edge portion on the front end side. The concave portion is formed by cutting the slit wall surface 36 from the middle to the tip side, thereby forming two surfaces 61 and 62 extending in the longitudinal direction. One surface 61 is formed parallel to the slit wall surface 36, and the other surface 62 is formed to intersect the surface 61 perpendicularly. A rear lip 60 is attached to these surfaces 61 and 62 so as to be in contact therewith. That is, the rear lip 60 is configured to have a surface that contacts the surfaces 61 and 62. A part of the rear lip 60 surrounded by the two surfaces 61 and 62 is formed by a fixing member 64, and the other part is formed by a cemented carbide member 63. That is, the carbide member 63 and the fixing member 64 are formed flush with each other. The cemented carbide member 63 has a T-shaped longitudinal cross section, and the top side of the T-shaped cemented carbide member 63 is flush with the extension line of the slit wall surface 36 as a surface on which the slit 71 is formed. Is formed. One end surface of the top side of the T-shaped super hard member 63 is in contact with the surface 62, and the end surface of the leg side is in contact with the surface 61. The other end face of the top side faces the base material 5. The fixing member 64 is accommodated and provided in the entire region surrounded by the top side, the leg side, the extended surface of one end surface of the top side of the T-shaped cemented carbide member 63, and the extended surface of the end surface of the leg side. It has been. The fixing member 64 is fixed to the cemented carbide member 63 by brazing, for example. Such a fixing member 64 is made of a material such as iron that is softer than the cemented carbide member 63, and is provided with a tap hole into which the bolt 65 is screwed. And the axial direction of the volt | bolt 65 cross | intersects the 2 surfaces 61 and 62, and it is provided in the angle which provides the force which presses the cemented carbide member 63 against the 2 surfaces 61 and 62 of a recessed part with the tensile force of the volt | bolt 65. . According to this, the cemented carbide member 63 of the rear lip 60 is pressed against the two surfaces 61 and 62 of the concave portion of the rear head member 32 by fastening the bolt 65 in the direction of the arrows 66 and 67. Further, the same effects as those of the front lip 40 can be obtained with respect to deflection and rigidity.

  The center lip 50 is formed in a substantially rhombus whose longitudinal cross section is symmetrical. A pair of adjacent two sides of the substantially rhombus are the slit wall surfaces 37 and 38 forming the slits 70 and 71, and another two sides opposite to the pair of the approximately rhombus are in the longitudinal direction at the edge of the central head member. It is set as the surface contact | abutted to two surfaces where the recessed part formed by extending to mutually intersects. Surfaces that contact the two surfaces 51 and 52 of the concave portion of the central head member 31 are provided on the bottom of the approximately rhombus. A part of the cemented carbide member 53 surrounded by the two surfaces 51 and 52 is formed by a fixing member 54. Further, the bolt 55 fastened to the fixing member 54 of the central lip 50 has an axial direction that intersects the two surfaces 51 and 52 of the concave portion of the central head member 31 and is pressed against the carbide member 53 of the central lip 50. The pressure is provided at an angle at which the two surfaces 51 and 52 are evenly distributed.

  Thus, according to this embodiment, as shown in FIG. 5, the front lip 40 and the rear lip 60 are pressed against the two surfaces of the concave portions of the front head member 30 and the rear head member 32. Further, the center lip 50 is pressed against the direction of the arrows 56 and 57, that is, the two surfaces 51 and 52 of the recess of the center head member 31 by fastening the bolt 55, so that the center lip 50 and the center head member 31 It can suppress that a clearance gap arises between them. Furthermore, in this embodiment, since the force pressed against the two surfaces 51 and 52 is evenly distributed, the slit wall surfaces 37 and 38 of the central lip 50 forming the slits 70 and 71 are held uniformly, It is possible to prevent a step or a gap from being easily formed on either one of the surfaces 37 and 38.

  Further, in the present embodiment, the cemented carbide member is formed in a substantially diamond shape, and a part of the cemented carbide member 53 surrounded by the two surfaces 51 and 52 of the concave portion of the central head member 31 has substantially the same length as the cemented carbide member 53. Although the structure is formed by the fixing member 54, the present invention forms a surface that contacts the two surfaces of the concave portion of the head member on the cemented carbide member, and fixes a part of the cemented carbide member surrounded by the two surfaces. However, the present invention is not limited to this. For example, as shown in FIGS. 6A and 6B, a plurality of cylindrical holes are formed in the longitudinal direction of the cemented carbide member 53. It is good also as a structure which embeds and arrange | positions the column-shaped fixing member 58 in a cylindrical hole.

  Moreover, in the said embodiment, although the width | variety of the center lip 50 is a width which does not reach a liquid reservoir chamber, it can also be formed so that the width | variety of the center lip 50 may reach a liquid reservoir chamber. In the present embodiment, an example in which one central lip 50 is provided has been described. However, the present invention is not limited to this, and the present invention has a configuration in which a plurality of central lips 50 are arranged and a plurality of types of coating films are stacked. Can be applied.

It is the front view which fractured | ruptured a part of coating head of one Embodiment which concerns on this invention, and is the figure which showed the torn surface in the II line | wire of FIG. It is a perspective view of the coating head of one embodiment concerning the present invention. It is an enlarged view of the front-end | tip part of the application | coating head of FIG. It is the figure which showed the modification of the coating head of one Embodiment which concerns on this invention. It is an enlarged view of the front-end | tip part of the application | coating head of FIG. It is the figure which showed the modification of a center lip, (b) is sectional drawing which showed the modification of a center lip, (a) is the figure which showed the fracture surface in the XI-XI line of (b). .

Explanation of symbols

3, 3a, 3b Liquid reservoir chamber 10, 30 Front head member 11, 32 Rear head member 31 Central head member 13, 14, 35, 36, 37, 38 Slit wall surface 20, 21, 41, 42, 51, 52, 61 , 62 Two surfaces of recess 22 Lip 40 Front lip 50 Center lip 60 Rear lip 23, 43, 53, 63 Carbide member 24, 44, 54, 64 Fixing member 25, 45, 55, 65 Bolt

Claims (4)

In the coating head formed by holding the lips provided in parallel along the longitudinal edges of the plurality of head members in parallel and forming slits for circulating the coating liquid between the lips,
The lip is mounted in contact with two mutually intersecting surfaces of a recess formed in the longitudinal direction at the edge of the head member, and a bolt is screwed onto a part of the lip surrounded by the two surfaces. It is formed with a member to be joined, and the other part is formed with a cemented carbide member,
The coating head is characterized in that the bolt has an axial direction intersecting with the two surfaces, and is provided at an angle that applies a force for pressing the lip against the two surfaces of the recess by a tensile force of the bolt.   The lip has a T-shaped longitudinal section, the top of the T-shaped surface forms the slit, and one end surface of the T-shaped top and the T-shaped leg. A region surrounded by the top surface, the leg side, an extended surface of one end surface of the top side, and an extended surface of the end surface of the leg side. The coating head according to claim 1, wherein a member to which the bolt is screwed is fixed to the cemented carbide member. A front head member, a center head member, and a rear head member are provided, and the front lip, the center lip, and the rear lip, which are respectively attached along the longitudinal edge of each head member, are sequentially held in parallel. In the coating head formed with a slit through which the coating liquid flows,
The front lip and the rear lip have a T-shaped longitudinal cross section, the top of the T-shape is a surface that forms the slit, and one end surface of the T-shaped top and the top An end surface of a T-shaped leg side is disposed in contact with two mutually intersecting surfaces of a recess formed by extending the edge of each head member in the longitudinal direction, the top side, the leg side, A region surrounded by an extended surface of one end surface of the top side and an extended surface of the end surface of the leg side is formed by a member to which a bolt is screwed, and the other part is formed by a cemented carbide member,
The central lip is formed in a substantially rhombus whose longitudinal cross section is symmetrical, and the two adjacent sides of the rhombus are surfaces forming the slit, and the other two sides of the approximately rhombus are the surfaces of the central head member. The surface of the recess formed by extending in the longitudinal direction at the edge is a surface that abuts on the two surfaces intersecting each other, and a part of the lip surrounded by the two surfaces is formed by a member that a bolt is screwed to, and other parts Made of cemented carbide,
Each of the bolts is provided at an angle at which an axial direction intersects with the two surfaces and a force is applied to press the lips against the two surfaces of the recess by a tensile force of the bolts. Application head.   The said head member has a liquid storage chamber which stores a coating liquid, The said center lip is formed in the width | variety which reaches the said liquid storage chamber, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. Application head.

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