JP2004174489A - Extrusion type nozzle and coating apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an extrusion type nozzle which can uniformly apply a plurality kinds of coating liquid having viscosities different from each other or coating liquid exhibiting large viscosity change. <P>SOLUTION: The extrusion type nozzle is provided with: a block having therein a manifold 4 for distributing the coating liquid in the coating width direction, a slit for allowing the coating liquid distributed in the manifold 4 to pass through the slit and a lip to be a discharge port for discharging the coating liquid from the slit; and a slit forming member 3 forming the wall surface of the slit present in the manifold 4 side and displaceable to change the gap of the slit. <P>COPYRIGHT: (C)2004,JPO

Description

  The present invention is applied to the production of, for example, magnetic recording tapes, adhesive tapes, photographic printing papers, offset plates, battery plates, fuel cell catalyst layers, plasma display panel front plate dielectric layers, etc. The present invention relates to an extrusion type nozzle for applying a liquid to the surface of an object to be coated and a coating apparatus using the nozzle.

  Extrusion type nozzles that apply a coating liquid to the surface of a continuously running coating object include, for example, magnetic recording tapes, adhesive tapes, photographic printing papers, offset plates, battery plates, fuel cell catalyst layers, Used for manufacturing a dielectric layer of a display panel front plate. The extrusion-type nozzle includes a manifold for distributing the supplied coating liquid in a coating width direction, and a slit for rectifying and discharging the coating liquid in the manifold. When applying a coating liquid having a viscosity, the pressure in the manifold is not uniform in the coating width direction due to pressure loss. For this reason, in the extrusion type nozzle in which the length of the slit in the discharge direction is constant over the application width direction, the application amount is large in the high pressure portion, the application amount is small in the low pressure portion, and the application amount in the application width direction is small. Becomes uneven.

  For this reason, several methods have been proposed for making the application amount distribution uniform in the application width direction.

  As an example, there is a method of increasing the pressure in the manifold by increasing the length of the slit in the application liquid discharge direction or reducing the gap between the slits, and making the application amount distribution in the application width direction uniform. (For example, see Patent Document 1).

  In addition, the length of the slit in the application liquid discharge direction is shortened linearly or curvedly from the supply side of the coating liquid toward the opposite side so as to make the application amount distribution in the application width direction uniform. (For example, see Patent Document 2).

  In addition, a method in which a part of the slit is formed of a replaceable member, and the length of the discharge direction and the gap of the slit is changed by replacing the member to uniformly apply coating liquids having different viscosities with one nozzle. Is known (for example, see Patent Document 3).

In addition to these methods, it has a plurality of mechanisms for deforming the lip provided on the lip which is the outlet of the coating liquid from the slit, and according to the application amount distribution, the mechanisms for closing the outlet of the slit by these mechanisms. There is also known a method in which a gap is changed in a coating width direction to obtain a uniform coating amount distribution.
JP-A-1-180266 (page 2-3, FIG. 1-2) Japanese Patent Application Laid-Open No. 6-335563 (page 3, FIG. 1) JP-A-10-5660 (page 2, FIG. 1)

  However, in the method of increasing the pressure in the manifold by increasing the length of the slit in the application liquid discharge direction or reducing the gap between the slits and making the application amount distribution in the application width direction uniform, the inside of the nozzle is not used. The nozzle is deformed by the increase in the fluid pressure, and as a result, the application amount distribution becomes non-uniform. Therefore, the deformation of the nozzle can be suppressed by increasing the thickness of the nozzle body and increasing the rigidity of the nozzle. However, it was necessary to solve the problem that the cost was high, the weight of the nozzle was increased, and the working efficiency was deteriorated.

  In addition, the length of the slit in the application liquid discharge direction is shortened linearly or curvedly from the supply side of the coating liquid toward the opposite side so as to make the application amount distribution in the application width direction uniform. This method is effective for a specific coating liquid, but in order to uniformly apply a plurality of coating liquids having different viscosities, a nozzle having a shape adapted to the viscosity of each paint is required. And even with the same type of paint, if the viscosity of the coating liquid fluctuates depending on the paint lot and time, it has been difficult to apply uniformly.

  In addition, a method in which a part of the slit is formed of a replaceable member, and the length of the discharge direction and the gap of the slit is changed by replacing the member to uniformly apply coating liquids having different viscosities with one nozzle. Then, by preparing a plurality of members, it is possible to apply a plurality of coating liquids having different viscosities uniformly and relatively inexpensively.However, when the viscosity of the coating liquid fluctuates depending on the paint lot and time, However, uniform coating was difficult.

  In addition, there are multiple mechanisms provided on the lip, which is the exit of the coating liquid from the slit, to deform the lip.The gap at the exit of the slit is changed in the application width direction by these mechanisms according to the distribution of the coating amount. In order to obtain a uniform application amount distribution, it is necessary to appropriately set the displacement amount of each of the plurality of lip deformation mechanisms, and a complicated and expensive feedback control mechanism is required. In addition to the necessity, there is a problem that it takes time until the application amount converges to a target variation value.

  The present invention has been made in order to solve the above-described problems, and can uniformly apply a coating liquid on the surface of an object to be coated. An object of the present invention is to provide an extrusion-type nozzle which can apply even a large coating liquid uniformly and can be applied at low cost.

  In order to achieve the above object, the extrusion type nozzle of the present invention has a manifold for distributing the coating liquid in the coating width direction, a slit for passing the coating liquid distributed to the manifold, and a discharge port for discharging the coating liquid from the slit. The slit is formed to form a block including a first portion and a second portion closer to the discharge port than the first portion, and a wall surface of the first portion of the slit to form a gap between the first portion of the slit. A first forming member that can be displaced so as to be changed, a first forming member that is replaceable, and a first forming member that has a length corresponding to the length of the application liquid in the discharge direction. A configuration that varies along the width direction, a configuration further including a displacement mechanism that inclines the first forming member along the application width direction, and the slit further includes a third portion that is closer to the manifold than the first portion. Of the slit A structure further comprising a replaceable second forming member forming the wall surface of the portion 3; a second wall which forms the wall surface of the manifold and is displaceable so as to change an area of a cross section perpendicular to the application width direction of the manifold; It has a configuration further including a forming member and a configuration further including a displacement mechanism that inclines the second forming member along the application width direction.

  The extrusion-type nozzle of the present invention further includes a block formed with a manifold for distributing the coating liquid in the coating width direction, a slit for passing the coating liquid distributed to the manifold, and a discharge port for discharging the coating liquid from the slit. And a forming member that forms a wall surface of the manifold and is displaceable so as to change an area of a cross section perpendicular to the application width direction of the manifold, and a displacement mechanism that inclines the forming member along the application width direction. Is further provided.

  Further, the coating apparatus of the present invention is formed with a manifold for distributing the coating liquid in the coating width direction, a slit for passing the coating liquid distributed to the manifold, and a discharge port for discharging the coating liquid from the slit, and the slit is a first slit. A block including a portion and a second portion closer to the discharge port than the first portion, and a forming member that forms a wall surface of the first portion of the slit and is displaceable to change a gap between the first portion of the slit. An extrusion-type nozzle for forming a coating film using a coating liquid, a measuring instrument for measuring at least one of weight, thickness and density of the coating film, and an extrusion nozzle according to the measured value. A controller for controlling the displacement of the forming member of the lug-type nozzle, a manifold for distributing the coating liquid in the coating width direction, and a slit for passing the coating liquid distributed to the manifold. And a block formed with a discharge port for discharging the coating liquid from the slit, and a forming member which forms a wall surface of the manifold and is displaceable so as to change an area of a cross section perpendicular to a coating width direction of the manifold, An extrusion nozzle for forming a coating film using a coating liquid, a measuring instrument for measuring at least one of the weight, thickness and density of the coating film, and formation of an extrusion nozzle according to the measured value And a controller for controlling the displacement of the member.

  With these configurations, a manifold-side slit forming member, which is a displaceable first forming member capable of adjusting the coating amount distribution, is provided in the nozzle, and the gap of the slit, which is the first knob on the manifold side, is changed. Since the pressure distribution in the nozzle can be changed and the application amount distribution in the application width direction can be changed, the application amount distribution can be made uniform and an extrusion-type nozzle that can be applied to all application devices can be provided. When the viscosity does not change significantly, it is only necessary to replace the slit forming member with one that matches the viscosity of the coating liquid. If the viscosity does not change significantly, the coating amount distribution is changed by changing the slit gap. It is possible to make the slit forming member optimal according to the viscosity of the coating liquid by changing the length of the coating liquid in the discharge direction in the coating width direction. Doing, uniform coating is possible over the coating width direction.

  Further, by displacing the manifold forming member, which is the second forming member, and changing the cross-sectional area of the manifold, the coating amount distribution in the coating width direction can be changed, and the coating amount distribution can be made uniform. By providing a manifold forming member for changing the cross section of the manifold and a manifold side slit forming member as the third portion, the application amount distribution can be made more uniform.

  Furthermore, in the coating apparatus equipped with the extrusion type nozzle of the above configuration, even during long-time continuous coating, there is little variation in the coating amount, and the coating amount distribution can be made more uniform. The effect is great for coating liquids with large changes.

  The extrusion-type nozzle of the present invention uses a single extrusion-type nozzle to replace or displace a member inside the nozzle when applying a coating liquid onto the surface of an object to be coated, thereby providing a plurality of types having different physical properties. Not only can uniform application of the coating liquid be realized at very low cost, but also the amount of displacement of the slit forming member and / or the manifold forming member can be measured by means of measuring the weight of the coating film or the material constituting the coating film. Since it can be controlled, it is excellent in applying a coating liquid having a large change in viscosity depending on the lot and time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a side sectional view of an extrusion type nozzle 100 according to Embodiment 1 of the present invention. FIG. 2 is a perspective view of the main body block 1 of the extrusion type nozzle 100 shown in FIG.

  The application liquid supplied into the nozzle 100 by a pump that supplies the application liquid at a stable speed like a metering pump is distributed in the application width direction C in the manifold 4 as shown in FIG. The coating liquid in the manifold 4 is discharged from the lip 8 serving as a discharge port to the surface of the object 9 through the slit 5 on the manifold side and the slit 6 on the lip side, and the coating film 10 is formed in the coating longitudinal direction A.

  The nozzle 100 includes a main body block 1, a main body block 2, and a manifold side slit forming member 3 for changing a gap between the manifold side slits 5. The forming member 3 forms one wall surface 5A of the manifold side slit 5. A lip side slit 6 is formed between the slit 5 and the lip 8.

  The extrusion type nozzle 100 includes a displacement mechanism 7 for displacing the forming member 3. By displacing the forming member 3 by the displacement mechanism 7 to change the gap t1 of the manifold side slit 5, the pressure distribution inside the nozzle 100 is changed to change the distribution of the application amount of the application liquid in the application width direction C. . By appropriately adjusting the displacement of the member 3, the distribution of the applied amount can be made uniform. When the gap t1 is narrowed, the coating amount at both ends in the coating width direction becomes larger than that at the center, and when the gap t1 is widened, the coating amount at the center portion in the coating width direction becomes larger than at both ends.

  The forming member 3 is replaceable. Further, as the displacement mechanism 7 of the member 3, for example, a differential screw, a heat bolt, or a piezo element can be used, and it is not particularly limited to these.

  The forming member 3 may be displaced while being inclined in the application width direction C. FIG. 3 is a perspective view of another extrusion-type nozzle 100A according to the first embodiment that enables this displacement. The nozzle 100A includes a plurality of displacement mechanisms 7A and 7B arranged along the application width direction C for displacing the forming member 3. By making the amount of displacement of the forming member 3 by the displacement mechanisms 7A and 7B different, the forming member 3 can be displaced while being inclined in the application width direction C. Even when the nozzle assembly accuracy is insufficient and the application amount distribution in the application width direction C becomes asymmetric, the gap t1 is changed in the application width direction C by displacing the member 3 by inclining it in the application width direction C. By doing so, the coating amount distribution can be made uniform.

  In order to prevent the tape-shaped object 9 from being pressed by the nozzle 100, a backup roll that supports the portion of the object 9 that receives the force from the nozzle 100 from behind may be used. This method requires linearity of the lip. The conventional extrusion-type nozzle has a plurality of mechanisms arranged along the coating width direction to deform the lip, and the conventional extrusion type nozzle deforms the lip. In this method, the coating amount distribution is made uniform and a smooth coating surface is obtained. It is difficult. Since the nozzle 100 according to the first embodiment does not have a mechanism for deforming the lip 8, it can be applied to this method.

  As shown in FIG. 2, the forming member 3 preferably has a shape in which the length L <b> 1 of the discharging direction B changes along the application width direction C. The distribution of the application amount in the application width direction C changes depending on the length L1, the inclination angle θ1, and the gap t1 of the slit 5 in the ejection direction B of the forming member 3. By setting the length L1, the inclination θ1, and the gap t1 optimally according to the viscosity of the coating liquid, the coating liquid can be uniformly applied in the coating width direction C.

  In the extrusion type nozzle 100 according to the first embodiment, when a plurality of types of coating liquids having different viscosities are applied, only the forming member 3 may be replaced with one having a shape adapted to the viscosity of the coating liquid. A forming member 3 having a large inclination angle θ1 is used for a coating liquid having a large viscosity, and a forming member 3 having a small inclination angle θ1 is used for a coating liquid having a small viscosity. If the difference between the viscosities of the plurality of types of coating liquids is not so large, the coating amount distribution can be made uniform by changing the gap t1 of the slit 5 by the displacement mechanism 7 of the forming member 3, so that the length L1 and the inclination angle θ1 are reduced. It is not necessary to prepare many finely different forming members 3. In this manner, a plurality of types of coating liquids having greatly different viscosities can be uniformly and inexpensively applied with a small number of forming members 3.

  FIG. 4 is a side sectional view of another extrusion type nozzle 200 according to the first embodiment. The nozzle 200 includes main body blocks 11 and 12, and a manifold-side slit forming member 17 that forms a wall surface 14A of the manifold-side slit 14 near the manifold 13. An intermediate slit forming member for changing a gap between the intermediate slits. The forming member 17 can be replaced and is fixed to the main body block 11. An optimum shape forming member 18 can be selected according to the viscosity of the coating liquid. The forming member 18 that can be displaced by the displacement mechanism 19 changes the gap t3 between the slit 15 located between the manifold 13 and the lip 20.

  By selecting and replacing the forming member 17 in accordance with the viscosity of the coating liquid, the nozzle 200 can uniformly apply the coating liquid having a wider range of viscosity even if the forming member 18 cannot be replaced.

  FIG. 5 is a block diagram of the coating apparatus according to the first embodiment. The coating apparatus includes an extrusion-type nozzle 100, a measuring device 1001 for measuring at least one of weight, thickness, and density at a plurality of points along the coating width direction C of the coating film 10, and a measuring device 1001. And a controller 1002 for controlling the displacement mechanism 7 in accordance with the value measured in the step (a). Even if the viscosity of the coating liquid changes with time, the distribution of the coating amount in the coating width direction C can be made uniform over the longitudinal direction of the coating direction A of the object to be coated, and the coating liquid can be applied evenly over the coating direction A. It is effective for coating liquids whose viscosity changes greatly with time. This coating apparatus can be applied to the nozzles 100A and 200, and has the same effect.

(Embodiment 2)
FIG. 6 is a side sectional view of an extrusion nozzle 300 according to the second embodiment. The nozzle 300 includes a main body block 23, a main body block 24, and a manifold forming member 27. The forming member 27 forms a wall surface 25A of the manifold 25, and a lip-side slit 26 is formed between the manifold 25 and the lip 29.

  The application liquid supplied into the nozzle 300 by a pump that supplies the application liquid at a stable speed like a metering pump is distributed in the application width direction in the manifold 25. The application liquid in the manifold 25 is discharged onto the surface of the object 30 through the slit 26, and the nozzle 300 forms the coating film 31 in the application longitudinal direction D.

  The nozzle 300 according to the second embodiment includes a displacement mechanism 28 that displaces the forming member 27. The cross-sectional area of the manifold 25 in a direction perpendicular to the application width direction can be changed by displacing the forming member 27 by the displacement mechanism 28. The change in the cross-sectional area of the manifold 25 changes the pressure loss in the flow of the coating liquid in the coating width direction in the manifold 25, and changes the distribution of the coating amount in the coating width direction. By appropriately adjusting the amount of displacement of the forming member 27, the application amount distribution can be made uniform.

  The nozzle 300 may be provided with a plurality of displacement mechanisms similar to the displacement mechanisms 7A and 7B of the nozzle 100A shown in FIG. 3 so that the forming member 27 can be inclined in the application width direction. Thus, even when the assembly accuracy of the nozzle 300 is insufficient and the application amount distribution in the application width direction is asymmetric, the cross-sectional area of the manifold 25 can change along the application width direction, and the application amount distribution can be changed similarly to the nozzle 100A. Can be uniform.

  As the displacement mechanism 28 of the forming member 27, for example, a differential screw, a heat bolt, or a piezo element can be used, and is not particularly limited thereto.

  The lip 29 of the nozzle 300 is not deformed similarly to the nozzle 100 according to the first embodiment shown in FIG. Therefore, similarly to the nozzle 100 according to the first embodiment, the nozzle 300 can be applied to all coating apparatuses including a coating apparatus using a backup roll.

  In addition, the nozzle 300 according to the second embodiment can be applied to the coating apparatus including the measuring device 1001 and the controller 1002 shown in FIG.

(Embodiment 3)
FIG. 7 is a side sectional view of an extrusion nozzle 400 according to the third embodiment. The nozzle 400 includes a main body block 32, a main body block 33, a manifold forming member 37, and a manifold side slit forming member 39. The forming member 37 forms a wall surface 34A of the manifold 34, and the forming member 39 forms one wall surface 35A of the manifold side slit 35. A lip-side slit 36 is formed between the manifold-side slit 35 and the lip 41.

  The application liquid supplied into the nozzle 400 by a pump that supplies the application liquid at a stable speed like a metering pump is distributed in the application width direction in the manifold 34. Then, the coating liquid in the manifold 34 is discharged onto the surface of the object 42 through the manifold-side slit 35 and the lip-side slit 36, and a coating film 43 is formed in the coating longitudinal direction F.

  The extrusion nozzle 400 further includes a displacement mechanism 38 for displacing the forming member 37 and a displacement mechanism 40 for displacing the forming member 39. By displacing the forming member 37 to change the cross-sectional area of the manifold 34 in a direction intuitive in the application width direction J, the pressure loss in the flow in the application width direction J in the manifold 34 changes, and The coating amount distribution changes. As described above, by appropriately adjusting the amount of displacement of the forming member 37, the application liquid can be applied with a uniform application amount distribution.

  The nozzle 400 may include a plurality of displacement mechanisms similar to the displacement mechanisms 7A and 7B of the nozzle 100A shown in FIG. 4 so that the forming member 37 can be inclined in the application width direction J. Thus, even when the assembly accuracy of the nozzle 400 is insufficient and the application amount distribution in the application width direction J is asymmetric, the cross-sectional area of the manifold 34 can change along the application width direction J, and the application amount is similar to that of the nozzle 100A. The distribution can be uniform.

  As a displacement mechanism of the forming members 37 and 39, for example, a differential screw, a heat bolt, a piezo element, or the like can be used, and is not particularly limited thereto.

  The lip 41 of the nozzle 400 is not deformed similarly to the nozzle 100 according to the first embodiment shown in FIG. Therefore, similarly to the nozzle 100 according to the first embodiment, the nozzle 400 can be applied to all coating apparatuses including a coating apparatus using a backup roll.

  FIG. 8 is a perspective view of the main body block 32 of the nozzle 400. The forming member 39 is replaceable, and preferably has a shape in which the length L2 of the discharge direction G changes along the application width direction J. By combining the forming member 39 with the main body block 32 and the main body block 33 shown in FIG. 7, the length of the manifold side slit 35 in the discharge direction G changes along the application width direction J. The application amount distribution in the application width direction J changes depending on the length L2 of the forming member 39 in the ejection direction G, the inclination angle θ2, and the gap t5 between the slits 35 on the inflow side. Therefore, by setting the length L2, the inclination angle θ2, and the gap t5 optimally according to the viscosity of the coating liquid and the like, the coating liquid can be uniformly applied over the coating width direction J.

  In the extrusion type nozzle 400 according to the third embodiment, when a plurality of types of application liquids having different viscosities are applied, the forming member 39 may be replaced with one having a shape adapted to the viscosity of the application liquid. A forming member 39 having a large inclination angle θ2 is used for a coating liquid having a large viscosity, and a forming member 39 having a small inclination angle θ2 is used for a coating liquid having a small viscosity. If the difference between the viscosities of the plural kinds of coating liquids is not so large, the gap t5 of the slit 35 is changed by the displacement mechanism 40 of the forming member 39, and the cross-sectional area of the manifold 34 is changed by the displacement mechanism 38 of the forming member 37. Can make the coating amount distribution uniform. Therefore, it is not necessary to prepare many forming members 39 whose length L2 and inclination angle θ2 are different from each other. In this manner, a plurality of coating liquids having greatly different viscosities can be applied uniformly and inexpensively with a small number of forming members 39.

  Further, the nozzle 400 according to the third embodiment can be applied to the coating apparatus including the measuring device 1001 and the controller 1002 shown in FIG. 5, and thus has the same effect as the coating apparatus according to the first embodiment.

(Example)
Hereinafter, the thicknesses of the coating films of Examples 1 to 3 obtained by applying the coating liquid on the surface of the object to be coated with the extrusion type nozzles 100, 300, and 400 according to Embodiments 1 to 3 of the present invention are measured. did. The thickness of the coating film of the comparative example obtained by the conventional extrusion type nozzle was also measured.

  Two types of coating solutions A and B having different viscosities in Examples 1 to 3 and Comparative Example were applied.

The coating solution A 1 wt% of carboxymethyl cellulose aqueous solution, obtained by dispersing carbon particles, solid content concentration 50 wt%, viscosity of 20 Pa · s at a shear rate of 1s ^-1, a viscosity 0.2 Pa · at a shear rate of 1000 s ^-1 s.

Coating solution B to 1 wt% of carboxymethyl cellulose aqueous solution, obtained by dispersing carbon particles, solid content concentration 45 wt%, viscosity of 2 Pa · s at a shear rate of 1s ^-1, a viscosity 0.1 Pa · at a shear rate of 1000 s ^-1 s.

  In Examples 1 to 3 and Comparative Example, the coating liquids A and B were coated on a 30 μm-thick aluminum foil, which is an object to be coated, with a stainless steel nozzle having a coating width of 500 mm to a coating film thickness of 0.2 mm. The coating was performed at a speed of 10 m / s. For the applied coating film, the thickness distribution in the coating width direction after drying is measured by a contact type film thickness meter, and the variation is shown in Table 1.

  In the comparative example using the conventional extrusion type nozzle, the application amount variation in the application width direction of the application liquid B is 6.0%. However, in the case of the coating liquid A, the variation in the thickness of the coating film was as large as 23.0%, and in the conventional extrusion type nozzle in which the shape inside the nozzle was fixed, the variation greatly varied depending on the type of the coating liquid.

  On the other hand, in Example 1, the variation in the thickness of the coating film in the coating width direction was 1.9% for the coating solution A and 1.5% for the coating solution B. By exchanging the manifold forming member which can be manufactured at low cost and adjusting the gap of the manifold side slit, the coating liquids A and B having different physical properties could be uniformly applied by one nozzle.

  In Example 2, the variation in the thickness of the coating film in the coating width direction was 1.8% for the coating solution A and 2.2% for the coating solution B. By displacing the manifold forming member and adjusting the manifold sectional area so as to minimize the variation, the coating liquids A and B having different physical properties could be uniformly applied by one nozzle.

  In Example 3, the variation of the thickness of the coating film in the coating width direction was 0.8% for the coating solution A and 0.6% for the coating solution B. By displacing the manifold forming member and the manifold side slit forming member together, and adjusting the cross-sectional area of the manifold and the gap between the manifold side slits so as to minimize the variation, the coating liquids A and B having different physical properties can be obtained with one nozzle. The coating was very uniform.

  The extrusion type nozzle shown in FIG. 5 is composed of the extrusion-type nozzle of the third embodiment with an online thickness gauge for measuring the thickness of the coating film and a controller for adjusting the displacement mechanism according to the measured thickness. did. The coating solution B was applied continuously for 12 hours using this coating apparatus. After 12 hours from the start of the application, the viscosity of the coating solution B had changed to の of the viscosity at the start of the application. A coating film was formed. In Examples 1 and 2, a uniform coating film was obtained in the same manner as in Example 3 by continuous coating for 12 hours using the same coating apparatus. With the conventional extrusion type nozzle in the comparative example, the coating liquid B was coated continuously for 12 hours. It has deteriorated to 14%.

  The extrusion type nozzle of the present invention is a block formed with a manifold for distributing the coating liquid in the coating width direction, a slit for passing the coating liquid distributed to the manifold, and a discharge port for discharging the coating liquid from the slit, A first forming member that forms a wall surface and can be displaced so as to change the gap of the slit, and can uniformly apply a plurality of coating liquids having different viscosities and a coating liquid having a large fluctuation in viscosity; So, using the coating device to apply the liquid to the surface of the object to run continuously, for example, magnetic recording tape, adhesive tape, photographic printing paper, offset plate material, battery plate, fuel cell catalyst layer, The present invention can also be applied to production of a dielectric layer of a plasma display panel front plate.

Side sectional view of the extrusion type nozzle in Embodiment 1 of the present invention. FIG. 2 is a perspective view of a main body block of the extrusion nozzle according to the first embodiment of the present invention. Perspective view of another extrusion type nozzle according to Embodiment 1 of the present invention. Side sectional view of another extrusion type nozzle according to Embodiment 1 of the present invention. Block diagram of a coating apparatus according to Embodiment 1 of the present invention Side sectional view of an extrusion nozzle according to Embodiment 2 of the present invention. Side sectional view of an extrusion type nozzle according to Embodiment 3 of the present invention. 3 is a perspective view of a main body block of an extrusion nozzle according to Embodiment 3 of the present invention.

Explanation of reference numerals

100, 100A, 200, 300, 400 Extrusion type nozzle 1, 11, 23, 32 Main block 2, 12, 24, 33 Main block 3, 17, 39 Manifold side slit forming member 4, 13, 25, 34 Manifold 5 , 14, 35 Manifold side slit 6, 16, 26, 36 Lip side slit 7, 7A, 7B, 40 Manifold side slit forming member displacement mechanism 8, 20, 29, 41 Lip 9, 21, 30, 42 Coating object 10 , 22, 31, 43 Coating film 15 Intermediate slit 18 Intermediate slit forming member 19 Intermediate slit forming member displacement mechanism 27, 37 Manifold forming member 28, 38 Manifold forming member displacement mechanism 1001 Measuring instrument 1002 Controller t1, t5 Manifold side slit Gap t2, t4, t6 L1, L2 Length of manifold side slit in discharge direction θ1, θ2 Taper angle of manifold side slit t3, t7 Intermediate slit gap A, D, F Application longitudinal direction B, G Discharge direction C, J Application Width direction

Claims (11)

A manifold for distributing the coating liquid in the coating width direction, a slit for passing the coating liquid distributed to the manifold, and a discharge port for discharging the coating liquid from the slit are formed, and the slit includes a first portion and the second portion. A block including a second portion closer to the discharge port than a first portion;
An extrusion-type nozzle, comprising: a first forming member that forms a wall surface of the first portion of the slit and is displaceable so as to change a gap of the first portion of the slit. . The extrusion nozzle according to claim 1, wherein the first forming member is replaceable. The extrusion-type nozzle according to claim 1, wherein the first forming member has a length in a discharge direction of the coating liquid that changes along the coating width direction. The extrusion-type nozzle according to claim 1, further comprising a displacement mechanism for inclining the first forming member along the application width direction. The slit further includes a third portion closer to the manifold than the first portion, and further includes a replaceable second forming member that forms a wall surface of the third portion of the slit. The extrusion nozzle according to claim 1. 2. The extrusion according to claim 1, further comprising a second forming member that forms a wall surface of the manifold and is displaceable so as to change an area of a cross section of the manifold perpendicular to the application width direction. 3. Mold nozzle. The extrusion-type nozzle according to claim 6, further comprising a displacement mechanism that inclines the second forming member along the application width direction. A block formed with a manifold for distributing the coating liquid in the coating width direction, a slit for passing the coating liquid distributed to the manifold, and a discharge port for discharging the coating liquid from the slit,
An extrusion-type nozzle, comprising: a forming member that forms a wall surface of the manifold and is displaceable so as to change an area of a cross section of the manifold perpendicular to the application width direction. 9. The extrusion type nozzle according to claim 8, further comprising a displacement mechanism for inclining the forming member along the application width direction. A manifold for distributing the coating liquid in the coating width direction, a slit for passing the coating liquid distributed to the manifold, and a discharge port for discharging the coating liquid from the slit are formed, and the slit includes a first portion and the first portion. A block including a second portion closer to the discharge port than a first portion, and a wall surface of the first portion of the slit, which is displaceable so as to change a gap between the first portion of the slit. An extrusion-type nozzle for forming a coating film with the coating liquid, comprising a forming member,
A measuring instrument for measuring at least one value of the weight, thickness, and density of the coating film,
A controller for controlling a displacement amount of the forming member of the extrusion type nozzle according to the measured value. A block formed with a manifold that distributes the coating liquid in the coating width direction, a slit through which the coating liquid distributed to the manifold passes, and a discharge port that discharges the coating liquid from the slit is formed, and a wall surface of the manifold is formed. An extrusion-type nozzle for forming a coating film with the coating liquid, comprising: a forming member displaceable so as to change an area of a cross section of the manifold perpendicular to the coating width direction;
A measuring instrument for measuring at least one value of the weight, thickness, and density of the coating film,
A controller for controlling a displacement amount of the forming member of the extrusion type nozzle according to the measured value.

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