Slit die

Abstract

A slit die that discharges a fluid toward a coating object includes a block having a front surface that faces the coating object, an inner surface that defines a slit, and an outer surface having a first groove that extends in a width direction of the slit die and at least one second groove that intersects the first groove and extends from the first groove toward the front surface, and at least one adjustment tool that changes a width of the first groove to adjust a width of the slit.

Description

Technical Field

[0001] This invention relates to a slit mold. Background Technology

[0002] Slit dies are widely used for coating various fluids. Methods for adjusting the amount of fluid ejected from a slit die include, for example, the following techniques.

[0003] Patent Document 1 discloses a die lip driving structure that uses a lever mechanism to adjust the gap between the lips. The die lip driving structure adjusts the gap between the first and second lips by applying a pressing or tensile load to a flexible lip that forms at least one of the first and second lips provided in the die body. For example, in the T-shaped die disclosed in Patent Document 1, a concave slit is provided near the lower end of the die body along the width direction, and a flexible lip capable of elastic deformation is formed with the concave slit as its boundary. By deforming the flexible lip starting from the concave slit, the gap between the first and second lips is adjusted.

[0004] Patent document 2 discloses an adjustment mechanism that adjusts the opening width of a slit at the front end of the tool body by adjusting the opening width of a slit formed along the length direction at the front end of the tool body. The adjustment mechanism adjusts the opening width of the slit via an electrically driven mechanism. The adjustment mechanism is movable along the length direction via an electrically movable mechanism.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2016-036926

[0008] Patent Document 2: Japanese Patent Application Publication No. 2019-171292 Summary of the Invention

[0009] The technical problem to be solved by the invention

[0010] If the flexible lip at a certain location is deformed by the lip driving structure disclosed in Patent Document 1, sometimes the flexible lips near the first flexible lip will also deform following the deformation of the first flexible lip. This phenomenon hinders the precise adjustment of the gap between the first and second lips, thereby reducing the uniformity of the coating thickness in the width direction. Furthermore, the adjustment mechanism disclosed in Patent Document 2 may also cause the phenomenon described above.

[0011] One aspect of the present invention aims to provide a slit mold that improves the uniformity of coating thickness in the width direction.

[0012] means for solving technical problems

[0013] The present invention includes the following methods.

[0014] <1> A slit mold comprising a slit through which a fluid is dispensed onto a coating object, the slit mold comprising: a block comprising a front end face opposite to the coating object, an inner surface defining the slit, and an outer surface having a first groove extending in the width direction of the slit mold and at least one second groove intersecting the first groove and extending from the first groove toward the front end face; and at least one adjusting device for changing the width of the first groove to adjust the width of the slit.

[0015] <2> According to the slit mold described in <1>, wherein,

[0016] The aforementioned adjustment tool includes a thread that changes the width of the first groove.

[0017] <3> According to the slit mold described in <1>, wherein,

[0018] The aforementioned adjustment tool includes: a pair of adjustment portions, including a first adjustment portion and a second adjustment portion disposed adjacent to each other on the outer surface of the block across the first groove; and a thread, disposed through the first adjustment portion of the pair of adjustment portions, and including a front end face that contacts the second adjustment portion of the pair of adjustment portions, wherein the thread applies force to the second adjustment portion to change the width of the first groove.

[0019] <4> According to the slit mold described in <1>, wherein,

[0020] The aforementioned adjustment tool includes: a pair of adjustment parts, including a first adjustment part and a second adjustment part disposed adjacent to each other on the outer surface of the block across the first groove; and a thread, which passes through the first adjustment part of the pair of adjustment parts and is disposed therethrough, and is inserted into the second adjustment part of the pair of adjustment parts, wherein the thread pushes and pulls the second adjustment part to change the width of the first groove.

[0021] <5> According to the slit mold described in <4>, wherein,

[0022] The first adjusting part includes an internal thread, the second adjusting part includes an internal thread, the thread is a differential thread including a first external thread and a second external thread, the first external thread engages with the internal thread of the first adjusting part, and the second external thread engages with the internal thread of the second adjusting part.

[0023] <6> The slit mold according to any one of <1> to <5> includes a plurality of adjustment tools arranged along the first groove on the outer surface of the block, wherein one of the at least one second groove is disposed between two adjacent adjustment tools.

[0024] Invention Effects

[0025] According to one aspect of the present invention, a slit mold can be provided to improve the uniformity of coating thickness in the width direction. Attached Figure Description

[0026] Figure 1 This is a schematic perspective view of the slit mold according to the first embodiment of the present invention.

[0027] Figure 2 yes Figure 1 A schematic side view of the slit mold shown.

[0028] Figure 3 It is used to explain the use Figure 1 and Figure 2 A schematic diagram of the coating method for the slit mold shown.

[0029] Figure 4 This is a schematic side view of the slit mold according to the second embodiment of the present invention. Detailed Implementation

[0030] The embodiments of the present invention will now be described in detail. The present invention is not limited to any of the following embodiments. The following embodiments may be appropriately modified within the scope of the objectives of the present invention.

[0031] When describing embodiments of the present invention with reference to the accompanying drawings, descriptions of components and symbols repeated in the drawings may sometimes be omitted. Components represented by the same symbols in the drawings refer to the same component. The ratios of dimensions in the drawings do not necessarily represent the ratios of actual dimensions.

[0032] In this invention, the numerical range represented by "~" indicates the range encompassed by the values ​​recorded before and after "~" as the lower and upper limits, respectively. In the numerical ranges described in stages in this invention, the upper or lower limit recorded within a certain numerical range can be replaced with the upper or lower limit of other numerical ranges described in stages. Furthermore, within the numerical ranges described in this invention, the upper or lower limit recorded within a certain numerical range can be replaced with the values ​​shown in the embodiments.

[0033] In this invention, the amount of each component in the composition refers to the total amount of the multiple substances present in the composition, unless otherwise specified, when multiple substances equivalent to each component are present in the composition.

[0034] In this invention, the term "process" includes not only independent processes, but also processes that can be clearly distinguished from other processes, as long as the intended purpose of the process can be achieved.

[0035] In this invention, "mass%" and "weight%" have the same meaning, and "parts of mass" and "parts of weight" have the same meaning.

[0036] In this invention, a combination of two or more preferred methods is a more preferred method.

[0037] In this invention, ordinal numbers (e.g., "first" and "second") are terms used to distinguish constituent elements, and do not limit the number of constituent elements or the quality of the constituent elements.

[0038] In this invention, "solid component" refers to components other than solvents.

[0039] <Slit mold according to the first embodiment>

[0040] refer to Figure 1 and Figure 2 The slit mold according to the first embodiment of the present invention will be described. Figure 1 This is a schematic perspective view of the slit mold according to the first embodiment of the present invention. Figure 2 yes Figure 1 The diagram shows a schematic side view of the slit mold. Directions X and Y are orthogonal to each other, as are directions X and Z. Direction Y and Z are also orthogonal to each other. Direction X is parallel to the width direction of the slit mold.

[0041] Figure 1 and Figure 2 The slit mold 100 shown includes a first block 10, a second block 20, and an adjustment tool 30. A slit 40 and a branch pipe 50 are formed between the first block 10 and the second block 20.

[0042] (Piece 1)

[0043] The first piece 10 and the second piece 20 together define the slit 40 and the branch pipe 50. The first piece 10 and the second piece 20 are opposite each other and are fixed to the second piece 20 by bolts (not shown).

[0044] The first piece 10 is made of stainless steel. However, the first piece 10 can be made of materials other than stainless steel. Examples of materials other than stainless steel include ceramics and superhard alloys.

[0045] The first piece 10 is cylindrical in shape, extending in the X direction. The width of the first piece 10 is determined, for example, based on the width of the coating. The width of the first piece 10 is preferably in the range of 20mm to 400mm. The width of the first piece 10 can be in the range of 20mm to 200mm. The width of the first piece 10 can be in the range of 50mm to 100mm. The width of the first piece 10 refers to the distance along the X direction from one end of the first piece 10 to the other.

[0046] The first piece 10 includes a front end face 10a, an inner surface 10b, and an outer surface 10c. In the coating method using the slit mold 100, the front end face 10a faces the object to be coated (not shown). The front end face 10a is located at the front end of the first piece 10 and faces in the Z direction. The front end face 10a extends in the X direction. The inner surface 10b defines a slit 40. The inner surface 10b faces in the Y direction. The inner surface 10b extends in both the X and Z directions. The outer surface 10c has a first groove 11 and a second groove 12. The outer surface 10c faces in the direction opposite to the Y direction. That is, the outer surface 10c is the outer surface of the slit mold 100. The outer surface 10c extends in both the X and Z directions.

[0047] The first piece 10 includes a front end portion 10d divided by a first groove 11 and a second groove 12. As described later, the front end portion 10d of the first piece 10 can be deformed by adjusting the tool 30 with the bottom 11a of the first groove 11 as the starting point. The number of front end portions 10d divided by one first groove 11 and two second grooves 12 is 10. However, the number of front end portions 10d divided by one first groove 11 and two second grooves 12 is not limited to 10. The number of front end portions 10d divided by one first groove 11 and two second grooves 12 can be varied according to the width of the first piece 10, the number of adjusting tools 30 that can be set, and the required uniformity of the coating thickness.

[0048] The first groove 11 divides the front end portion 10d of the first block 10 in both the X and Y directions, improving the mobility of the front end portion 10d of the first block 10. In the XZ view of the slit mold 100, the first groove 11 extends in the X direction, i.e., the width direction of the slit mold 100. Specifically, the first groove 11 extends from one end of the width of the slit mold 100 to the other. In the XZ view of the slit mold 100, the first groove 11 is parallel to the front end face 10a of the first block 10, i.e., the front end of the slit mold 100. If the first groove 11 is parallel to the front end of the slit mold 100 in the XZ view, the deviation of the movable range of the front end portion 10d of the first block 10 is reduced, and the uniformity of the coating thickness in the width direction is improved. Furthermore, the first groove 11 extends from the outer surface 10c towards the slit 40. Figure 2In this design, the bottom 11a of the first groove 11 is circular. The circular shape of the bottom 11a of the first groove 11 improves the mobility of the front end 10d of the first block 10. However, the shape of the bottom 11a of the first groove 11 is not limited to a circle; it can be a quadrilateral or other polygon.

[0049] The width of the first groove 11 is preferably in the range of 0.1 mm to 20 mm, more preferably in the range of 0.5 mm to 10 mm, and particularly preferably in the range of 1 mm to 5 mm. As the width of the first groove 11 increases, the mobility of the front end 10d of the first block 10 is improved. As the width of the first groove 11 decreases, the rigidity of the first block 10 is improved. The width of the first groove 11 refers to the shortest distance from one end of the first groove 11 to the other end along the direction Z in a top XZ view of the slit mold 100.

[0050] The depth of the first groove 11 is determined, for example, based on the thickness of the first block 10 and the mobility of the front end 10d of the first block 10. The depth of the first groove 11 is preferably in the range of 10 mm to 180 mm, more preferably in the range of 20 mm to 80 mm. As the depth of the first groove 11 increases, the mobility of the front end 10d of the first block 10 is improved. As the depth of the first groove 11 decreases, the rigidity of the first block 10 is improved. The preferred range of the maximum depth of the first groove 11 is the same as the preferred range of the depth of the first groove 11 described previously.

[0051] From the viewpoint of the mobility of the front end 10d of the first block 10 and the rigidity of the first block 10, the ratio of the depth to the width of the first groove 11 (i.e., [depth of the first groove 11] / [width of the first groove 11]) is preferably in the range of 2 to 20, more preferably in the range of 5 to 15. The ratio of the maximum depth to the width of the first groove 11 (i.e., [maximum depth of the first groove 11] / [width of the first groove 11]) is the same as the preferred range of [depth of the first groove 11] / [width of the first groove 11] already described.

[0052] The second groove 12 divides the front end 10d of the first block 10 in both the Y and Z directions, reducing the impact of deformation of one front end 10d on the other. As a result, the uniformity of the coating thickness in the width direction is improved. The second groove 12 intersects the first groove 11 at a right angle and extends from the first groove 11 towards the front end face 10a. That is, in the XZ view of the slit mold 100, the angle formed by the first groove 11 and the second groove 12 is 90°. However, the angle formed by the first groove 11 and the second groove 12 is not limited to 90°. The angle formed by the first groove 11 and the second groove 12 can be in the range of 85° to 95°. The angle formed by the first groove 11 and the second groove 12 can be in the range of 87° to 93°. The angle formed by the first groove 11 and the second groove 12 can be in the range of 89° to 91°. As the angle formed by the first groove 11 and the second groove 12 approaches 90°, the controllability of the slit 40 in the front end of the slit mold 100 is improved, and the uniformity of the coating thickness in the width direction is improved. Furthermore, similar to the first groove 11, the second groove 12 extends from the outer surface 10c toward the slit 40.

[0053] The width of the second groove 12 is preferably in the range of 0.1 mm to 20 mm, more preferably in the range of 0.5 mm to 10 mm, and particularly preferably in the range of 1 mm to 5 mm. As the width of the second groove 12 increases, the distance between two adjacent front ends 10d increases, reducing the impact of deformation of one front end 10d on the other. As a result, the uniformity of the coating thickness in the width direction is improved. As the width of the second groove 12 decreases, the number of second grooves 12 that can be formed in the first piece 10 increases. As the number of second grooves 12 increases, the adjustment portion for the width of the slit 40 in the front end of the slit mold 100 increases, and the coating thickness in the width direction is adjusted to be finer. As a result, the uniformity of the coating thickness in the width direction is improved. The width of the second groove 12 refers to the shortest distance from one end of the second groove 12 to the other along the direction X in a top view of the slit mold 100 (XZ view).

[0054] From the viewpoint of the mobility of the front end 10d and the controllability of the width of each slit 40 divided by the second groove 12, the ratio of the width of the second groove 12 to the width of the first groove 11 (i.e., [width of the second groove 12] / [width of the first groove 11]) is preferably in the range of 0.2 to 5, more preferably in the range of 0.5 to 3, and particularly preferably in the range of 0.7 to 1.5.

[0055] The depth of the second groove 12 is determined, for example, based on the thickness of the first piece 10 and the mobility of the front end 10d of the first piece 10. The depth of the second groove 12 is preferably in the range of 10 mm to 180 mm, more preferably in the range of 20 mm to 80 mm. As the depth of the second groove 12 increases, the influence of deformation of one front end 10d on the other front end 10d can be reduced, and the uniformity of the coating thickness in the width direction is improved. As the depth of the second groove 12 decreases, the rigidity of the first piece 10 is improved. The preferred range of the maximum depth of the second groove 12 is the same as the preferred range of the depth of the second groove 12 already described.

[0056] From the viewpoint of uniformity of coating thickness in the width direction and rigidity of the first block 10, the ratio of the depth to the width of the second groove 12 (i.e., [depth of the second groove 12] / [width of the second groove 12]) is preferably in the range of 2 to 20, more preferably in the range of 5 to 15. The ratio of the maximum depth to the width of the second groove 12 (i.e., [maximum depth of the second groove 12] / [width of the second groove 12]) is the same as the preferred range of [depth of the second groove 12] / [width of the second groove 12] already described.

[0057] From the viewpoint of uniformity of coating thickness in the width direction, the spacing of the second grooves 12 is preferably in the range of 10 mm to 100 mm, more preferably in the range of 15 mm to 50 mm, and particularly preferably in the range of 25 mm to 35 mm. Furthermore, the spacing of the second grooves 12 is preferably uniform. The spacing of the second grooves 12 refers to the distance between two adjacent second grooves 12 when viewed from the XZ plane of the slit mold 100.

[0058] The number of second grooves 12 extending from the first groove 11 to the front end face 10a is 11. However, the number of second grooves 12 is not limited to 11. The number of second grooves 12 can be varied according to the width of the first block 10, the number of adjustable tools 30 that can be set, and the required uniformity of coating thickness. As the number of second grooves 12 increases, the number of front end portions 10d divided by the first groove 11 and the second groove 12 increases, and the number of adjustable portions for the width of the slits 40 in the front end of the slit mold 100 increases. As a result, the coating thickness in the width direction is adjusted to be finer, and the uniformity of coating thickness in the width direction is improved.

[0059] Methods for manufacturing the first piece 10 include, for example, forging, casting, and machining. The first groove 11 and the second groove 12 can be formed during forging or casting. The first groove 11 and the second groove 12 can be formed by machining.

[0060] (Piece 2)

[0061] The second piece 20, together with the first piece 10, defines the slit 40 and the branch pipe 50. The second piece 20 is opposite to the first piece 10 and is fixed to the first piece 10 by bolts (not shown).

[0062] The second piece 20 is made of stainless steel. However, the second piece 20 may be made of materials other than stainless steel. Examples of materials other than stainless steel include those exemplified in the description of the composition of the first piece 10. The second piece 20 preferably contains the same components as those contained in the first piece 10.

[0063] The second block 20 is cylindrical in shape, extending in the direction X. The width of the second block 20 is the same as the width of the first block 10. The preferred range of the width of the second block 20 is the same as the preferred range of the width of the first block 10, which has already been described.

[0064] For example, methods of manufacturing the second piece 20 include forging, casting, and machining.

[0065] (Adjust the equipment)

[0066] The adjusting tool 30 changes the width of the first groove 11, and then adjusts the width of the slit 40 in the front end of the slit mold 100 by changing the width of the first groove 11. As described later, the adjusting tool 30 changes the width of the first groove 11 by pushing and pulling the second adjusting part 32 according to the rotation of the bolt 33. The adjusting tools 30 are arranged along the first groove 11 on the outer surface 10c of the first block 10. A second groove 12 is arranged between two adjacent adjusting tools 30. That is, the adjusting tools 30 and the second groove 12 are arranged alternately along the direction X, that is, the width direction of the slit mold 100.

[0067] The number of adjusting tools 30 is 10. However, the number of adjusting tools 30 is not limited to 10. The number of adjusting tools 30 can be varied according to the number of the front ends 10d of the first block 10 divided by the first groove 11 and the second groove 12. As the number of adjusting tools 30 increases, the thickness of the coating in the width direction is adjusted to be finer. As a result, the uniformity of the coating thickness in the width direction is improved.

[0068] The adjustment tool 30 includes a first adjustment part 31, a second adjustment part 32, and a bolt 33.

[0069] The first adjusting part 31 and the second adjusting part 32 constitute a pair of adjusting parts. The first adjusting part 31 and the second adjusting part 32 are arranged adjacent to each other on the outer surface 10c of the first block 10, separated by a first groove 11. The second adjusting part 32 contacts the front end portion 10d of the first block 10, which is divided by one first groove 11 and two second grooves 12. The first adjusting part 31 and the second adjusting part 32 are fixed to the outer surface 10c of the first block 10 by bolts (not shown). However, the first adjusting part 31 and the second adjusting part 32 can be fixed to the first block 10 by a fixing tool other than bolts. The first adjusting part 31 and the second adjusting part 32 can be fixed to the first block 10 by a method other than using a fixing tool. The first adjusting part 31 and the second adjusting part 32 are made of stainless steel. However, the first adjusting part 31 and the second adjusting part 32 can be made of a material other than stainless steel. Materials other than stainless steel can be used, for example, those exemplified in the description of the composition of part 10. The first adjusting part 31 and the second adjusting part 32 are prisms in shape. However, the shapes of the first adjusting part 31 and the second adjusting part 32 may also be other than prisms. The first adjusting part 31 includes an internal thread. The internal thread of the first adjusting part 31 is formed on the inner circumferential surface of the threaded hole defining the first adjusting part 31. The second adjusting part 32 includes an internal thread. The internal thread of the second adjusting part 32 is formed on the inner circumferential surface of the threaded hole defining the second adjusting part 32.

[0070] Bolt 33 is a threaded part that alters the width of the first groove 11. Specifically, bolt 33 is a differential thread that uses the difference in the spacing of the thread teeth to push and pull the second adjusting part 32. As described later, the width of the first groove 11 affects the width of the slit 40 in the front end of the slit mold 100. Bolt 33 is disposed through the first adjusting part 31 and inserted into the second adjusting part 32. Specifically, bolt 33 is inserted into the threaded hole of the second adjusting part 32 through the threaded hole of the first adjusting part 31. Bolt 33 can be disposed through both the first adjusting part 31 and the second adjusting part 32. Bolt 33 includes: a first external thread portion that engages with the internal thread portion of the first adjusting part 31; and a second external thread portion that engages with the internal thread portion of the second adjusting part 32. In bolt 33, the spacing of the first external thread portion is different from the spacing of the second external thread portion. "Spacing of external thread portions" refers to the interval between two adjacent thread teeth of the external thread portion. The absolute value of the difference between the spacing of the first external thread and the spacing of the second external thread can be 0.1 mm or more, 0.15 mm or more, or 0.2 mm or more. The absolute value of the difference between the spacing of the first and second external threads is preferably in the range of 0.1 mm to 0.6 mm, more preferably in the range of 0.15 mm to 0.5 mm, and particularly preferably in the range of 0.2 mm to 0.4 mm. In the bolt 33, the outer diameter of the first external thread is preferably larger than the outer diameter of the second external thread. The bolt 33 extends in the Z direction and is capable of rotating about an imaginary straight line along the Z direction. The bolt 33 can move in the Z direction or in the opposite direction while rotating. The direction and amount of movement of the bolt 33 are adjusted according to the rotation direction and amount of rotation of the bolt 33. Depending on the rotation direction and amount of rotation of the bolt 33, the force by which the bolt 33 pushes against or pulls out the second adjusting part 32 changes, thereby adjusting the width of the first groove 11. The bolt 33 is made of stainless steel. However, bolt 33 can be made of materials other than stainless steel. Examples of materials other than stainless steel include those exemplified in the description of the composition of block 10.

[0071] (slit)

[0072] The slit 40 is a space for discharging fluid to the object to be coated. The slit 40 is defined by the first block 10 and the second block 20. The slit 40 extends in the X and Z directions and forms an outlet at the front end of the slit mold 100. The width of the slit 40 at the front end of the slit mold 100 is determined, for example, based on the flow rate and viscosity of the coating liquid. The width of the slit 40 at the front end of the slit mold 100 is preferably in the range of 0.3 mm to 0.8 mm. The width of the slit 40 at the front end of the slit mold 100 refers to the distance from one end of the slit 40 to the other along the Y direction when viewed from the XY perspective of the front end of the slit mold 100.

[0073] (Branch pipe)

[0074] Branch pipe 50 is a space for storing fluid. Branch pipe 50 is defined by the first block 10 and the second block 20. Branch pipe 50 communicates with slit 40. The fluid stored in branch pipe 50 moves in the Z direction and is discharged through slit 40. In the XZ top view of slit mold 100, branch pipe 50 extends in the X direction, that is, the width direction of slit mold 100. Figure 2 In this design, the branch pipe 50 is generally trapezoidal in shape. The shape of the branch pipe 50 corresponds to the shape of the generally trapezoidal recess formed in the second block 20. However, the shape of the branch pipe 50 can be any shape other than generally trapezoidal. The shape of the branch pipe 50 can be semi-circular. The shape of the branch pipe 50 can be circular. A circular branch pipe is defined, for example, by a combination of the semi-circular recess formed in the first block 10 and the semi-circular recess formed in the second block 20.

[0075] (Method for adjusting the width of the slit)

[0076] refer to Figure 2 The method for adjusting the width of the slit 40 in the front end of the slit mold 100 is explained. The front end 10d of the first block 10, divided by the first groove 11 and the second groove 12, can deform starting from the bottom 11a of the first groove 11. Figure 2 If, as the bolt 33 rotates, the force with which it pushes against the second adjusting part 32 increases (in other words, if the distance between the first adjusting part 31 and the second adjusting part 32 increases), then the front end 10d of the first block 10 in contact with the second adjusting part 32 deforms counterclockwise from the bottom 11a of the first groove 11, and the width of the first groove 11 increases. As a result, the width of the slit 40 in the front end of the slit mold 100 decreases. On the other hand, if, as the bolt 33 rotates, the force with which it pulls out of the second adjusting part 32 increases (in other words, if the distance between the first adjusting part 31 and the second adjusting part 32 decreases), then the front end 10d of the first block 10 in contact with the second adjusting part 32 deforms clockwise from the bottom 11a of the first groove 11, and the width of the first groove 11 decreases. As a result, the width of the slit 40 in the front end of the slit mold 100 increases. By performing the actions described above, the width of the slit 40 in the front end of the slit mold 100 is adjusted. Furthermore, regarding the two adjacent front ends 10d separated by the second groove 12, the second groove 12 can suppress the transmission of force applied to one front end 10d by the adjusting tool 30 to the other front end 10d. That is, even if one front end 10d is deformed by the adjusting tool 30, the other front end 10d located next to it is less likely to deform. As a result, the multiple adjusting tools 30 arranged along the X direction can independently adjust the width of the slit 40 at the desired location, improving the uniformity of the coating thickness in the width direction.

[0077] (Coating method)

[0078] refer to Figure 3 The coating method using the slit mold 100 is described. Figure 3 It is used to explain the use Figure 1 and Figure 2 A schematic diagram of the coating method for the slit mold shown. Figure 3 The coating method shown can obtain multilayer films.

[0079] The film F, which is to be coated, is conveyed in a roll-to-roll manner. A slit mold 100 and a drying device 200 are provided in the middle of the conveying path of the film F.

[0080] As components of film F, examples include polymers and metals. Examples of polymers include polyethylene terephthalate, polyethylene naphthalate, and triacetyl cellulose. Film F may contain one or more polymers. Examples of metals include iron, chromium, nickel, titanium, copper, aluminum, silver, and gold. The metal may be an alloy. Examples of alloys include stainless steel and Invar alloy. Film F may contain one or more metals. In one embodiment, film F preferably contains a polymer, more preferably at least one selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, and triacetyl cellulose. Specific examples of films F containing polymers include films made of polyethylene terephthalate, films made of polyethylene naphthalate, and films made of triacetyl cellulose. In one embodiment, the thin film F preferably contains a metal, more preferably at least one selected from the group consisting of nickel, titanium, copper, aluminum, silver and gold, even more preferably at least one selected from the group consisting of copper and aluminum, and particularly preferably aluminum. Specific examples of the thin film F containing a metal include copper thin films and aluminum thin films.

[0081] Thin film F can possess high thermal conductivity. Examples of thin film F with high thermal conductivity include those with a thermal conductivity of 200 W / (m·K) or higher. There is no upper limit to the thermal conductivity of thin film F. The thermal conductivity of thin film F can be 500 W / (m·K) or lower. The thermal conductivity of thin film F is measured using a laser flash method. First, thin film F is cut along its width at three locations (specifically, 5 mm from both ends and the center of the width direction) with a diameter of φ5 mm to 10 mm to obtain three test samples. The thermal conductivity of each test sample is measured using a thermophysical property measuring device employing the laser flash method (e.g., LFA-502, KYOTO ELECTRONICS MANUFACTURING CO.,LTD.). The arithmetic mean of the three measurements is taken as the thermal conductivity of thin film F.

[0082] There are no restrictions on the layer structure of thin film F. Thin film F can have a single-layer structure or a multi-layer structure.

[0083] From the viewpoint of improving productivity, the film F is preferably a long strip film. The length of the film F is preferably 10m or more, more preferably 100m or more, and particularly preferably 200m or more. There is no upper limit to the length of the film F. The upper limit of the length of the film F can be 1,000m or 500m. The length of the film F is generally in the range of 10m to 1,000m. "The length of the film F" refers to the distance from one end of the film F to the other in the conveying direction of the film F.

[0084] There is no limitation on the width of the film F. From the point of view of improving productivity, the width of the film F is preferably in the range of 100 mm to 2,000 mm.

[0085] There is no limitation on the thickness of the film F. From the point of view of material cost, the thickness of the film F is preferably in the range of 3 μm to 50 μm, and more preferably in the range of 10 μm to 30 μm.

[0086] The preferred conveying speed of the thin film F is in the range of 1 m / min to 100 m / min.

[0087] The tension of the film F is preferably in the range of 10 N / m to 500 N / m, more preferably in the range of 50 N / m to 200 N / m. Tension control is implemented, for example, using a known tension control device. Tension control can be implemented using a known conveying device including a tension control mechanism. For example, a conveying device including a tension control mechanism can be described as a conveying device including a tendency drive roller. The tendency drive roller rotates, for example, by friction or magnetic force acting between a rotating shaft supporting the tendency drive roller and the tendency drive roller. The rotating shaft rotates, for example, by a motor. That is, the force that rotates the rotating shaft is transmitted to the tendency drive roller, causing the tendency drive roller to rotate. A conveying device including a tendency drive roller can, for example, control the tension of the film based on the rotational speed of the rotating shaft. Technology related to tendency drive rollers is described, for example, in Japanese Patent No. 4066904. The contents of the above-mentioned document are incorporated herein by reference.

[0088] exist Figure 3 In the process, the slit mold 100 dispenses coating liquid into the conveyed film F. The coating liquid is supplied from a container (not shown) that stores the coating liquid to the slit mold 100.

[0089] There are no restrictions on the type of coating liquid. The coating liquid is preferably an aqueous coating liquid. "Aqueous coating liquid" means a coating liquid in which the solvent is essentially water. "The solvent in the coating liquid is essentially water" means that water constitutes the majority of the solvent in the coating liquid. The proportion of water in the solvent of the aqueous coating liquid is preferably 90% by mass or more, more preferably 95% by mass or more, and particularly preferably 100% by mass.

[0090] Water contained in an aqueous coating solution can be, for example, natural water, purified water, distilled water, ion-exchanged water, pure water, and ultrapure water.

[0091] The water content in the aqueous coating solution is preferably 40% by mass or more, more preferably 50% by mass or more, relative to the total mass of the aqueous coating solution. The water content in the aqueous coating solution is preferably less than 100% by mass, more preferably less than 80% by mass, relative to the total mass of the aqueous coating solution.

[0092] Aqueous coating solutions may contain particles. Examples of particles include inorganic particles, organic particles, and composite particles of inorganic and organic substances.

[0093] Examples of inorganic particles include, for example, metal particles, semi-metal particles, metal compound particles, semi-metal compound particles, inorganic pigment particles, mineral particles, and polycrystalline diamond particles. Examples of metals include, for example, alkali metals, alkaline earth metals, transition metals, and their alloys. Examples of semi-metals include, for example, silicon. Examples of metal compounds and semi-metal compounds include, for example, oxides, hydroxides, and nitrides. Examples of inorganic pigments include, for example, carbon black. Examples of minerals include, for example, mica.

[0094] Examples of organic particles include, for example, resin particles and organic pigment particles.

[0095] Examples of composite particles that are inorganic and organic matter include, for example, composite particles in which inorganic particles are dispersed in an organic-based matrix, composite particles in which inorganic matter is coated around organic particles, and composite particles in which organic matter is coated around inorganic particles.

[0096] To impart dispersion, the particles can be surface-treated. Composite particles can be formed through surface treatment.

[0097] There are no restrictions on the particle size, specific gravity, or form of application. The particle size, specific gravity, and form of application may be determined, for example, based on the coating film formed by the coating liquid and the manufacturing conditions of the coating film.

[0098] Aqueous coating solutions may contain one or more types of particles.

[0099] There is no limit to the particle content in an aqueous coating solution. The particle content in an aqueous coating solution can be determined, for example, based on the purpose of adding the particles, the coating film formed by the coating solution, and the manufacturing conditions of the coating film.

[0100] Examples of components of aqueous coating solutions include, for example, adhesive components, components that help disperse particles, polymerizable compounds, polymerization initiators, and components used to improve coating performance (e.g., surfactants).

[0101] The concentration of solid components in the coating liquid is preferably less than 70% by mass, more preferably 30% to 60% by mass.

[0102] There is no limitation on the thickness of the coating liquid applied to film F (hereinafter, sometimes referred to as "the thickness of the liquid film"). The thickness of the liquid film can be in the range of 10 μm to 200 μm. The thickness of the liquid film can be in the range of 20 μm to 100 μm.

[0103] exist Figure 3 In this process, the drying apparatus 200 dries the coating liquid coated on the film F. A multilayer film is obtained by drying the coating liquid. The drying apparatus 200 dries the coating liquid by supplying air. The temperature of the air supplied is preferably in the range of 25°C to 200°C, more preferably in the range of 30°C to 150°C. The air velocity supplied is preferably 1.5 m / s to 50 m / s. Examples of drying apparatuses for drying the coating liquid include, for example, an oven, a warm air blower, and an infrared heater.

[0104] The applications of multilayer films obtained by the method described above are not limited.

[0105] <The slit mold according to the second embodiment>

[0106] refer to Figure 4 The slit mold according to the second embodiment of the present invention will be described. Figure 4 This is a schematic side view of the slit mold according to the second embodiment of the present invention. Figure 4 In the slit mold 110 shown, an adjustment tool 60 is used instead of an adjustment tool 30, and except for this point, it includes the same constituent elements as the slit mold 100 already described. Hereinafter, the slit mold 110 will be described in detail. However, in the following description relating to the slit mold 110, content that is repeated with the slit mold 100 will be omitted.

[0107] The configuration of the adjustment tool 60 is the same as that of the adjustment tool 30 described above, and the number of adjustment tools 60 is the same as the number of adjustment tools 30 described above.

[0108] The adjustment tool 60 includes a first adjustment part 61, a second adjustment part 62, and a bolt 63.

[0109] The first adjustment part 61 includes an internal thread portion. The internal thread portion of the first adjustment part 61 is formed on the inner circumferential surface of the threaded hole that defines the first adjustment part 61.

[0110] Bolt 63 is threaded to change the width of the first groove 11. Bolt 63 is disposed through the first adjusting part 61. Bolt 63 includes: an external thread portion that engages with the internal thread portion of the first adjusting part 61; and a front end face that contacts the second adjusting part 62. The front end face of bolt 63 faces the second adjusting part 62. The contact between the front end face of bolt 63 and the second adjusting part 62 allows force to be applied to the second adjusting part 62. Bolt 63 extends in the Z direction and is capable of rotating about an imaginary straight line along the Z direction. Bolt 63 can move in the Z direction or in the opposite direction while rotating. The direction and amount of movement of bolt 63 are adjusted according to the rotation direction and amount of rotation of bolt 63. Depending on the rotation direction and amount of rotation of bolt 63, the force of bolt 63 pressing against the second adjusting part 62 changes, thereby adjusting the width of the first groove 11.

[0111] The method for adjusting the width of the slit 40 in the front end of the slit mold 110 will be explained. The adjustment of the slit 40 width is performed by bringing some or all of the front ends of the bolts 63 into contact with the second adjustment part 62. Alternatively, if the width of the slit 40 is set within a target range, the front ends of all bolts 63 may not need to contact the second adjustment part 62. If the force of the bolts 63 pressing against the second adjustment part 62 increases as the bolts 63 rotate, the front end 10d of the first block 10 in contact with the second adjustment part 62 deforms counterclockwise from the bottom 11a of the first groove 11, increasing the width of the first groove 11. As a result, the width of the slit 40 in the front end of the slit mold 110 decreases. On the other hand, if the force of the bolt 63 pressing against the second adjusting part 62 decreases as the bolt 63 rotates, the front end 10d of the first block 10 in contact with the second adjusting part 62 deforms clockwise starting from the bottom 11a of the first groove 11, and the width of the first groove 11 decreases. As a result, the width of the slit 40 in the front end of the slit mold 110 increases. Through the operation described above, the width of the slit 40 in the front end of the slit mold 110 is adjusted.

[0112] <Variation Example>

[0113] In the first embodiment described above, a thread for changing the width of the first groove is sequentially inserted into the first adjustment portion and the second adjustment portion. In a modified example, the thread for changing the width of the first groove may also be sequentially inserted into the second adjustment portion and the first adjustment portion. That is, an adjustment tool including a thread that passes through the second adjustment portion and is inserted into the first adjustment portion can be used.

[0114] In the first embodiment described above, the thread that changes the width of the first groove engages with the second adjusting portion. That is, the external thread portion of the thread that changes the width of the first groove engages with the internal thread portion of the second adjusting portion. In a variation, an adjusting tool can be used that includes a thread that pushes and pulls the second adjusting portion by engaging with it in a manner other than screwing it with the second adjusting portion. As a thread for pushing and pulling the second adjusting portion, for example, a thread that includes an enlarged diameter portion that engages with the second adjusting portion can be cited. In the enlarged diameter portion, the outer diameter of the thread increases. The outer diameter of the enlarged diameter portion can increase linearly or non-linearly towards the front end of the thread. By engaging the enlarged diameter portion of the thread with a space of a shape corresponding to the shape of the enlarged diameter portion of the thread provided inside the second adjusting portion, the second adjusting portion can be pushed and pulled. Furthermore, as a thread for pushing and pulling the second adjusting portion, a thread that includes a narrow portion that engages with the second adjusting portion can also be cited. In the narrow portion, the outer diameter of the thread decreases. The second adjusting part can be pushed or pulled by fitting the narrow portion of the thread into a space whose shape corresponds to the shape of the narrow portion of the thread provided inside the second adjusting part. The thread for pushing or pulling the second adjusting part preferably includes a front end face that contacts the second adjusting part.

[0115] In the second embodiment described above, a thread that changes the width of the first groove passes through the first adjusting portion and is configured such that the front end face of the thread contacts the second adjusting portion. In a modified example, an adjusting tool that includes a thread that passes through the second adjusting portion and includes a front end face that contacts the first adjusting portion can be used. In the modified example described above, the width of the first groove is adjusted by changing the force applied to the first adjusting portion by the thread.

[0116] In the embodiments described above, the thread that changes the width of the first groove moves the front end of the first block, which is divided by the first and second grooves, via the second adjustment part. In a variation, an adjustment tool that changes the width of the first groove by directly moving the front end of the first block, which is divided by the first and second grooves, can be used.

[0117] In the embodiments described above, an adjustment tool is used to change the width of the first groove by rotating the thread. In a variation, an adjustment tool including a thermally expanding component can be used. The volume of the thermally expanding component changes according to temperature. By changing the volume of the thermally expanding component according to temperature, the width of the first groove 11 is adjusted. As a thermally expanding component, a heat bolt can be cited as an example. Technology related to heat bolts is described, for example, in Japanese Patent Application Publication Nos. 2020-152097 and 2017-159490.

[0118] In the above embodiments, an adjustment tool that changes the width of the first groove by hydraulic or electric drive can be used.

[0119] In the above embodiments, the first block can be formed by combining multiple components. The first slot and the second slot can, for example, be formed by combining multiple components constituting the first block. In the above embodiments, the second block can also be formed by combining multiple components.

[0120] Example

[0121] The present invention will now be described in detail with reference to embodiments. However, the present invention is not limited to the following embodiments.

[0122] <Example 1>

[0123] (Preparation of thin-film AL1)

[0124] As the thin film AL1, an aluminum thin film with a width of 380 mm, a thickness of 10 μm, a length of 300 m, and a thermal conductivity of 230 W / (m·K) was prepared. The thin film AL1 was rolled into a roll to form a roll film.

[0125] (Preparation of coating solution A)

[0126] The following components were mixed to prepare coating solution A.

[0127] • Polyvinyl alcohol (CKS-50, saponification degree: 99 mol%, degree of polymerization: 300, Nippon Synthetic Chemical Industry Co., Ltd.): 58 parts by weight

[0128] •CELLOGEN PR (DKS Co., Ltd.): 24 parts by weight

[0129] Surfactant (NIHON EMULSION Co., Ltd., EMLEX 710): 5 parts by weight

[0130] ·ART PEARL (registered trademark) J-7P water dispersion: 913 parts by weight

[0131] An aqueous dispersion of ART PEARL J-7P was prepared by the following method: 3 parts by mass of EMLEX 710 (NIHON EMULSION Co., Ltd., a nonionic surfactant) and 3 parts by mass of sodium carboxymethyl cellulose (DKS Co., Ltd.) were added to 74 parts by mass of pure water. 20 parts by mass of ART PEARL J-7P (Negami Chemical Industrial Co., Ltd., silica-crosslinked acrylic resin microparticles) were added to the obtained aqueous solution, and the mixture was dispersed using an Ace homogenizer (NISSEI Corporation) at 10,000 rpm (revolutions per minute) for 15 minutes to obtain an aqueous dispersion of ART PEARL J-7P (particle concentration: 20% by mass). The true specific gravity of the silica-crosslinked acrylic resin microparticles in the obtained aqueous dispersion was 1.20, and the average particle size of the microparticles was 6.5 μm.

[0132] (Preparation of the slit mold)

[0133] Through casting and machining, a product with the following properties was obtained: Figure 1 and Figure 2 The first and second pieces are shown in the diagram. After the first and second pieces are connected together by bolts, the first piece is provided with features including... Figure 1 and Figure 2 The adjustment tool is shown as a component. The bolt of the adjustment tool has a differential thread, comprising an external thread portion with an outer diameter of 8 mm and a pitch of 1.25 mm, and an external thread portion with an outer diameter of 10 mm and a pitch of 1.5 mm. The bolt moves 0.25 mm with each rotation. The external thread portion of the former engages with the internal thread portion of the second adjustment part, and the external thread portion of the latter engages with the internal thread portion of the first adjustment part. The slit mold is obtained through the above steps. The dimensions of the slit mold are shown below.

[0134] Slot mold width: 350mm

[0135] The width of the slit in the front end of the slit mold: 0.5mm

[0136] Width of the first slot: 4mm

[0137] Depth of the first groove: 30mm

[0138] Width of the second slot: 4mm

[0139] Maximum depth of the second slot: 30mm

[0140] The spacing of the second slot: 30mm

[0141] (Fabrication of multilayer thin films)

[0142] Use includes, for example Figure 3 The manufacturing apparatus for the components shown applies a coating solution A to a thin film AL1, followed by drying of the coating solution. The conveying speed of the thin film AL1 is 30 m / min. Through these steps, a multilayer thin film is obtained.

[0143] <Example 2>

[0144] The structure of the slit mold was modified according to the description in Table 1. Otherwise, a multilayer film was obtained by following the same steps as in Example 1.

[0145] <Comparative Examples 1 to 3>

[0146] The structure of the slit mold was modified according to the description in Table 1. Otherwise, a multilayer film was obtained by following the same steps as in Example 1.

[0147] <Evaluation>

[0148] (Uniformity of coating thickness in the width direction)

[0149] The thickness of the coating in the width direction of the multilayer film was measured at 10 points every 5 mm using a film thickness gauge (SI-T90, KEYENCE CORPORATION). The thickness distribution T of the obtained multilayer film in the width direction was calculated and evaluated according to the following criteria. The evaluation results are shown in Table 1.

[0150] A: T≤2%

[0151] B: 2% < T < 4%

[0152] C: 4% ≤ T < 6%

[0153] D: 6% ≤ T

[0154] [Table 1]

[0155]

[0156] As shown in Table 1, the uniformity of the coating thickness in Examples 1 to 2 is superior compared to that in Comparative Examples 1 to 3.

[0157] The invention described in Japanese Patent Application No. 2020-210534, filed on December 18, 2020, is incorporated herein by reference. All documents, patent applications, and technical standards described herein are incorporated herein by reference to the extent that they are specifically and separately described therein.

[0158] Symbol Explanation

[0159] 10-First piece, 10a-Front end face, 10b-Inner surface, 10c-Outer surface, 10d-Front end, 11-First groove, 11a-Bottom, 12-Second groove, 20-Second piece, 30-Adjusting tool, 31, 61-First adjusting part, 32, 62-Second adjusting part, 33, 63-Bolt, 40-Slit, 50-Branch pipe, 100, 110-Slit mold, 200-Drying device, F-Film.

Claims

1. A slit mold comprising a slit through which a fluid is dispensed onto a coating object, wherein, The slit mold includes: A block comprising: a front end face opposing the object to be coated; an inner surface defining the slit; and an outer surface having: a first groove extending in the width direction of the slit mold; and at least one second groove intersecting the first groove and extending from the first groove toward the front end face; and At least one adjusting device that changes the width of the first groove to adjust the width of the slit. The second groove is not formed on the inner surface.

2. The slit mold according to claim 1, wherein, The adjustment tool includes a thread that changes the width of the first groove.

3. The slit mold according to claim 1, wherein, The adjustment tool includes: a pair of adjustment portions, each including a first adjustment portion and a second adjustment portion disposed adjacent to each other on the outer surface of the block across the first groove; and a thread that passes through the first adjustment portion of the pair of adjustment portions and includes a front end face that contacts the second adjustment portion of the pair of adjustment portions, the thread applying force to the second adjustment portion to change the width of the first groove.

4. The slit mold according to claim 1, wherein, The adjustment tool includes: a pair of adjustment parts, each including a first adjustment part and a second adjustment part disposed adjacent to each other on the outer surface of the block across the first groove; and a thread that passes through the first adjustment part of the pair of adjustment parts and is inserted into the second adjustment part of the pair of adjustment parts, the thread pushing and pulling the second adjustment part to change the width of the first groove.

5. The slit mold according to claim 4, wherein, The first adjusting part includes an internal thread, the second adjusting part includes an internal thread, the thread is a differential thread including a first external thread and a second external thread, the first external thread engages with the internal thread of the first adjusting part, and the second external thread engages with the internal thread of the second adjusting part.

6. The slit mold according to any one of claims 1 to 5, wherein, The at least one adjusting device includes a plurality of adjusting devices arranged along the first groove on the outer surface of the block, wherein one of the at least one second groove is disposed between two adjacent adjusting devices.

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