CN117940221A - Coating apparatus and coating film forming method - Google Patents
Coating apparatus and coating film forming method Download PDFInfo
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- CN117940221A CN117940221A CN202280062168.8A CN202280062168A CN117940221A CN 117940221 A CN117940221 A CN 117940221A CN 202280062168 A CN202280062168 A CN 202280062168A CN 117940221 A CN117940221 A CN 117940221A
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- 239000011248 coating agent Substances 0.000 title claims abstract description 278
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 103
- 239000000758 substrate Substances 0.000 claims abstract description 99
- 230000002093 peripheral effect Effects 0.000 claims abstract description 59
- 239000003973 paint Substances 0.000 claims description 56
- 238000004401 flow injection analysis Methods 0.000 claims description 19
- 238000005507 spraying Methods 0.000 claims description 17
- 238000007639 printing Methods 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000002243 precursor Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
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- 239000007788 liquid Substances 0.000 description 20
- 238000011282 treatment Methods 0.000 description 18
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- 230000000052 comparative effect Effects 0.000 description 2
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
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- 239000012895 dilution Substances 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The purpose is to provide a coating device and a coating film forming method, which can shorten the processing time and improve the productivity when coating a high-viscosity coating on the peripheral surface of a cylindrical substrate and blowing air to planarize the coating film, and can prevent uneven coating, coating stripes and improving the quality of the formed coating film. In order to achieve the object, there is provided a coating apparatus comprising at least 1 coating unit for coating a coating material on a peripheral surface of a cylindrical substrate, at least 1 rotation driving unit for rotating the cylindrical substrate about a cylindrical axis, at least 1 airflow jetting unit for jetting an airflow to a part of the peripheral surface of the cylindrical substrate, and at least 1 moving unit for enabling the airflow jetting unit to move so as to jet an airflow to the peripheral surface of the coating material, wherein the airflow jetting unit comprises a plurality of airflow jetting units, the moving unit and the driving unit, and the airflow jetting unit jets an airflow to the whole area of the peripheral surface of the coating material.
Description
Technical Field
The present invention relates to a coating apparatus for applying a coating material to a peripheral surface of a cylindrical substrate, and a coating film forming method.
Background
In fields such as printing plates used in flexographic printing, gravure printing, and the like, photoreceptors used in electrophotographic image forming apparatuses, and belt manufacturing, a coating film is formed on the peripheral surface of a cylindrical substrate, and various methods have been proposed for forming the coating film.
Examples of the method of applying the coating material to the peripheral surface of the cylindrical substrate include dip coating in which the substrate is immersed in a liquid bath and lifted up, spiral coating in which the peripheral surface of the substrate is coated in a spiral manner, spray coating in which droplets are blown onto the peripheral surface of the substrate, and the like.
Among them, the spiral coating as shown in patent document 1 is a method of: the coating film is formed by rotating a cylindrical substrate around an axis, discharging the coating material from the coating nozzle while relatively moving the coating nozzle in the axial direction, and applying the coating material spirally to the peripheral surface of the cylindrical substrate. Screw coating has advantages in that it is efficient in use of the coating liquid, it is possible to apply even a high-viscosity coating material, and it is possible to dry and cure the coating material while rotating the coating material.
On the other hand, in spiral coating, spiral coating streaks are easily generated. As a method for solving this problem, for example, patent document 2 discloses a method of flattening a coating film by blowing air immediately after the coating material is adhered to the peripheral surface of a cylindrical substrate.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. Hei 02-273576
Patent document 2: japanese patent laid-open No. 2006-055778
Disclosure of Invention
Problems to be solved by the invention
However, the following problems exist in the conventional art. In the method of flattening the coating film by air jet to the paint, the flattening treatment time may be prolonged. For example, when a single air jet unit is used to planarize the entire surface of a coating film on the peripheral surface of a cylindrical substrate, the longer the distance that the air jet unit should move, the longer the time (planarization time) required for the 1 air jet unit to scan the entire surface of the cylindrical substrate. In particular, under the condition that much energy is required for planarization of high-viscosity coating film formation, and the like, the moving speed of the air jet unit is also low, and thus the planarization treatment time is further prolonged.
In contrast, patent document 2 proposes a slit-type air nozzle capable of blowing air to the entire axial direction at the same time, and a block-type air nozzle incorporating a plurality of air nozzles, but since the nozzle positions are fixed with respect to the axial direction during the planarization process, unlike the planarization process in which 1 air nozzle is moved, the force for moving the paint in the axial direction during the planarization process is weak. Therefore, under the conditions of high-viscosity paint and film-type coating, sufficient planarization treatment cannot be performed.
In view of the above problems, an object of the present invention is to provide a coating apparatus and a coating method that can form a high-quality coating film by reducing a processing time and improving productivity when a high-viscosity coating material is applied to a peripheral surface of a cylindrical substrate and air is blown to planarize the coating film, and performing sufficient planarization under high-viscosity coating material and film-type coating conditions.
Means for solving the problems
In order to solve the above problems, the coating device of the present invention has the following configuration. That is to say,
(1) A coating apparatus comprises at least 1 coating unit for coating a coating material on the peripheral surface of a cylindrical substrate, at least 1 rotation driving unit for rotating the cylindrical substrate about the axis of the cylinder, at least 1 airflow spraying unit for spraying airflow to a part of the peripheral surface of the cylindrical substrate, and at least 1 moving unit for enabling the airflow spraying unit to move in a mode of spraying airflow to the peripheral surface of the coating material, wherein the airflow spraying unit is provided with a plurality of airflow spraying units, the moving unit and the driving unit, and airflow is sprayed to the whole area of the peripheral surface of the coating material.
(2) The coating apparatus according to (1), wherein the coating means includes moving means for moving the discharge hole of the coating material in a direction different from a direction in which the peripheral surface of the substrate is rotated by the rotation driving means, and the coating material is applied by moving the moving means, and the movement of the discharge hole by the moving means provided in the coating means and the movement of the air flow injecting means by the moving means for moving the air flow injecting means can be independently controlled.
(3) The coating apparatus according to (1) or (2), wherein the plurality of air jet units are arranged at regular intervals in a direction parallel to a rotation axis of the cylindrical substrate, and each air jet unit is spaced apart from a circumferential surface of the cylindrical substrate by a regular interval in a radial direction.
(4) The coating apparatus according to any one of (1) to (3), wherein the air flow spraying means further comprises means for controlling the pressure of the sprayed air flow or the distance between the spraying portion of the air flow and the circumferential surface of the coating material.
(5) The coating apparatus according to any one of (1) to (4), wherein the moving means for moving the air jet means further comprises means for controlling a moving distance and/or a moving speed of the air jet means.
(6) The coating apparatus according to any one of (1) to (5), wherein the means for controlling the pressure of the ejected air flow includes a determiner for determining a start point and/or an end point of movement in conjunction with the movement portion of the air flow ejecting means, and a controller for storing information of the movement amount of the movement portion and the pressure of the air flow and executing a program of a predetermined scan.
(7) A coating film forming method is characterized in that a coating film is formed by discharging paint from a paint discharge hole that moves linearly in an axial direction to a peripheral surface of a cylindrical base material while rotating the cylindrical base material about a cylindrical axis, and the method comprises the steps of: in the step of jetting the air stream, the plurality of air stream jetting units are arranged at regular intervals in the axial direction, and the plurality of air stream jetting units jet the air stream simultaneously while jetting the air stream at the same speed in the axial direction, and jet the air stream over the entire peripheral surface of the coating material.
(8) The method for forming a coating film according to (7), wherein the plurality of air jet units are air jet nozzles for jetting air from jet holes, and the plurality of air jet units move in the axial direction at a constant moving speed while jetting air at a constant supply pressure or a constant flow rate, and the supply pressure or the flow rate of air is continuously decreased from the constant supply pressure or the constant flow rate until the movement is stopped.
(9) The method for forming a coating film according to (7), wherein the plurality of air jet units are air jet nozzles for jetting air from jet holes, and the plurality of air jet units move in the axial direction at a predetermined moving speed while jetting air at a predetermined supply pressure, and the moving speed is continuously increased from the predetermined moving speed until the movement is stopped.
(10) A method for producing an waterless lithographic printing plate precursor, wherein a coating film comprising an organosilicon material is formed on the peripheral surface of a columnar substrate by using the coating film forming method according to any one of (7) to (9).
Effects of the invention
By using the coating apparatus and the coating film forming method of the present invention, even under coating conditions such as coating of a high-viscosity coating liquid onto the peripheral surface of a cylindrical substrate and coating of a thin film, it is possible to planarize the film surface in a short time, and it is possible to form a coating film over the entire periphery of the cylindrical substrate with high productivity. Further, the coating unevenness can be flattened in the axial direction, and the residue of the coating unevenness after the flattening treatment is less likely to occur, and a coating film having good quality can be formed over the entire width.
Drawings
Fig. 1 is a schematic perspective view showing an embodiment of a coating apparatus according to the present invention.
Fig. 2 is a schematic front view showing an embodiment of the coating apparatus according to the present invention.
Fig. 3 is a schematic plan view showing an embodiment of the coating apparatus according to the present invention.
Fig. 4 is a schematic side view showing an embodiment of the coating device according to the present invention.
Fig. 5 is a schematic view showing a coating film cross section in the form of a coating stripe.
Fig. 6 is a schematic diagram illustrating an embodiment of a method for flattening a coating film.
Fig. 7 is a graph showing an embodiment of (a) a relationship between a supply pressure and a movement distance of an air jet unit and (b) a relationship between a movement speed of the air jet unit and a movement distance in a flattening operation.
Fig. 8 is a schematic diagram showing measurement results of a change in film thickness shape during a planarization operation.
Detailed Description
An embodiment of the present invention will be described below with reference to the drawings. The present invention will be understood from the following description and drawings, but the embodiments of the present invention are not limited to them.
< Constitution of coating apparatus >
Fig. 1 is a schematic configuration diagram showing an example of the coating apparatus. Fig. 1 (a) mainly shows a configuration when coating is performed, and fig. 1 (b) mainly shows a configuration when a jet air flow is injected to planarize a coating film. Fig. 2, 3 and 4 are a front view, a plan view and a right side view of the coating apparatus 100 in the coating operation shown in fig. 1 (a), respectively. The coating apparatus 100 shown in fig. 1 moves the discharge nozzle 121 for discharging the paint in the axial direction of the cylindrical substrate 111 while rotating the cylindrical substrate 111 to be coated around the axial center as shown in fig. 1 (a), applies the paint F to the outer peripheral surface of the substrate, and then sprays an air flow toward the paint F on the outer peripheral surface of the substrate while rotating the cylindrical substrate 111 around the axial center as shown in fig. 1 (b). The paint is flattened by moving a plurality of air jet units provided at regular intervals in the axial direction of the cylindrical base 111.
In fig. 1, 1 air flow injection unit is representatively illustrated by 1 air flow injection part 141. For example, a hole for injecting air flow is provided at the tip of the air flow injection portion 141, and air flow can be injected to a part of the peripheral surface of the cylindrical base material. The jet hole of the air flow can be round or slit. In fig. 1, the air jet part 141 at only the end is given a reference numeral as 1 air jet unit, but the nozzle-shaped part protruding from the air jet head 142 is some of the air jet parts 141, that is, has a plurality of air jet units. In fig. 1 (b), the plurality of air jet parts 141 can be moved in the axial direction using a moving unit of the air jet unit. The moving unit of the air flow ejecting unit is connected to a stage 151, a slider 152, and an actuator 153 as moving mechanisms.
In forming a coating film, the air flow is sprayed over the entire surface of the peripheral surface, and the area where 1 air flow spraying unit is responsible is small, and the air flow is uniformly sprayed from the plurality of air flow spraying units, and the air flow is sprayed over the entire surface of the peripheral surface to which the coating material is applied. Regarding the planarization treatment time, the target time (minutes) can be obtained by dividing the moving distance S (m) of 1 air jet unit in the length L (m) of the cylindrical substrate by the moving speed (m/min). That is, an example of the coating apparatus is provided with a plurality of movable air-jet units, and jets air-jet to the entire periphery of the cylindrical substrate coated with the coating material. The device has a function of forming a coating film by applying a coating material spirally to the peripheral surface of a cylindrical substrate, and then flattening the coating film by causing air or the like to collide with the coating material applied to the peripheral surface while simultaneously moving a plurality of air jet units in a direction parallel to the axis of rotation of the cylindrical substrate. Planarization is also known as planarization (planarization).
The coating apparatus 100 of the present invention includes a rotation driving unit 110 for rotating the cylindrical substrate 111 shown in fig. 3, a coating unit for discharging a coating material shown in fig. 4, a moving unit for moving the coating unit in the longitudinal direction of the substrate (Y direction in the drawing) shown in fig. 2 and 3, an air flow jetting unit for jetting an air flow to a part of the peripheral surface of the cylindrical substrate 111 shown in fig. 3 and 4, and a moving unit for enabling the air flow jetting unit to move shown in fig. 3 and 4. The cylindrical base 111 is a base having a cylindrical shape, and also includes a hollow cylindrical base.
Hereinafter, the rotary driving unit, the coating unit, the moving unit of the coating unit, the air jet unit, and the moving unit of the air jet unit will be described in detail.
< Rotation drive Unit >
The rotation driving unit 110 shown in fig. 2 and 3 includes left and right rotation center shafts 112 and 113 for rotatably supporting the cylindrical base material 111, support tables 114 and 115 for supporting the rotation center shafts, an actuator 116 connected to the rotation support shafts and driving the cylindrical base material 111 to rotate, and a rotation speed controller 117 for controlling the actuator and controlling the rotation speed of the cylindrical base material 111. The rotation driving means can rotate the cylindrical base material 111 at an arbitrary rotation speed, and the rotation speed of the cylindrical base material 111 can obtain a rotation speed suitable for coating and a rotation speed suitable for flattening a coating film by the air jet means. The rotation driving unit is preferably controlled independently of a unit that moves the discharge hole of the paint, a moving unit that moves the plurality of air flow ejecting units, that is, an arrow (reference numeral P) in fig. 1.
< Coating Unit and moving Unit thereof >
The coating unit shown in fig. 4 includes a discharge nozzle 121 for discharging paint from a discharge hole, a coating head 122 for supplying paint, a metering pump 123, and a paint tank 124 for accumulating paint. The coating liquid can continuously discharge the coating material F from the coating tank 124 through a flow path (not shown) in the coating head 122 and from the discharge hole of the discharge nozzle 121 by an arbitrary discharge amount. The discharge method of the paint by the discharge nozzle 121 is not limited, and may be in the form of droplets or a curtain, but is preferably in the form of a liquid column.
The moving unit of the coating unit shown in fig. 2 and 3 includes a stage 131 for supporting the coating head 122, a slider 132 for moving the stage, an actuator 133 for driving the slider, and a controller 134 for controlling the actuator, and can move the coating head 122 at an arbitrary speed with respect to the axial direction of the cylindrical substrate 111. The longitudinal direction is a direction parallel to the central axis of the cylindrical base material. The stage 131 has an adjusting mechanism for adjusting the distance between the discharge nozzle 121 and the cylindrical substrate 111 in the coating head 122. In the case where the coating head 122 includes a plurality of discharge nozzles 121, the adjustment mechanism may be provided for each discharge nozzle.
The coating unit preferably includes a moving unit that moves the paint discharge hole in a direction different from a direction in which the peripheral surface of the substrate is rotated by the rotation driving unit. Preferably, the paint is applied to the circumferential surface of the cylindrical substrate by moving the moving means, and the paint F is applied spirally on the circumferential surface. In this case, the paint F is in the form of a coating film having an uncoated portion as shown in fig. 5 (a) or in the form of a coating film having irregularities as shown in fig. 5 (b).
< Air jet Unit and moving Unit thereof >
Fig. 4 is a schematic view of a cylindrical substrate when viewed from the side surface direction. The air jet unit shown in fig. 4 is representatively illustrated by an air jet section 141. The 1 airflow jet unit has at least 1 airflow jet part 141, and the plurality of airflow jet units are arranged in the axial direction of the columnar base material.
Preferably, the plurality of air jet units, that is, the air jet units, are arranged at regular intervals in a direction parallel to the pivot axis of the cylindrical base material, and each air jet unit is spaced apart from the circumferential surface of the cylindrical base material by a regular interval in the radial direction.
That is, as shown in fig. 3, the plurality of gas flow injection units include a gas flow injection portion 141 that injects a plurality of gas flows at regular intervals in the longitudinal direction of the cylindrical substrate 111, a gas flow injection head 142 that supplies gas to the gas flow injection portion 141, a pressure control unit 143 that controls the pressure of the gas supplied to the gas flow injection head, and a compressed gas supply source 144 that supplies compressed gas to the pressure control unit, and the gas G can be continuously injected toward the outer peripheral surface of the cylindrical substrate 111.
In fig. 3, the air jet unit is representatively shown by an air jet part 141, and a plurality of air jet parts 141 are provided in an air jet head 142. The air jet part 141 is fixed by bolts at equally discrete positions in the axial direction with respect to the air jet head 142, and the mounting position can be adjusted by changing the fixing position. The airflow jet part 141 has an injection hole for injecting an airflow, and has a structure for blowing the paint F on the peripheral surface toward the surface of the cylindrical substrate through the injection hole.
In fig. 3, the air jet part 141 is a separate nozzle having a gas supply port, and is integrally formed by being fixed to the air jet head 142, but a distribution pipe having a manifold may be formed as the air jet head 142, and a plurality of air jet holes leading to the manifold may be provided in the air jet head 142, and the air jet holes may be replaced with the air jet part 141. The airflow jet means jets airflow from the airflow jet portion 141 toward a part of the peripheral surface coated with the paint, and the airflow jet portion 141 includes a plurality of airflow jet means and a plurality of airflow jet means, and the airflow jet means and the plurality of airflow jet means are arranged to jet airflow to the entire peripheral surface coated with the paint. The configuration of the air flow jetting portion 141 is not limited, but the cross-sectional shape may be a circle, a slit, or the like. The pressure value controlled by the pressure control unit 143 may be controlled to a pressure value corresponding to the moving position in conjunction with the moving unit of the air jet unit shown in fig. 3. In fig. 2, the air jet unit and its moving unit are not shown, but the air jet unit and its moving unit are present on the back side of the cylindrical substrate 111.
In the present invention, the "plurality of air jet units" may be the air jet units and the moving units thereof integrated together, or may be operated individually, or the moving units may be the plurality of air jet units integrated together and operated by one moving unit. As described above, the air jet unit is represented by an air jet unit having an injection hole for injecting an air flow, and is regarded as a plurality of air jet units if there are a plurality of positions where the air flow is injected.
Fig. 3 shows an example of a moving mechanism of the airflow jet section 141. The moving means of the air jet unit includes a stage 151 for supporting the air jet head 142, a slider 152 for moving the stage, an actuator 153 for driving the slider, and a control device 154 for controlling the actuator, and can move the air jet head 142 at an arbitrary speed in the longitudinal direction of the cylindrical substrate 111. The movement speed at this time may be controlled by changing the movement speed according to the movement position. The stage 151 has a mechanism for adjusting the distance between the air jet part 141 and the cylindrical substrate 111 by adjusting the distance between the air jet head 142 and the cylindrical substrate 111.
Here, the plurality of air jet holes of the plurality of air jet parts 141 preferably have a constant gap in the radial direction from the peripheral surface of the cylindrical base 111. This is to stably control the air flow from the plurality of air flow injection holes. The term "radially keeping a constant gap with the circumferential surface of the cylindrical base member" means: when the cylindrical base material rotates, the distance between the surface of the circumferential surface of the cylindrical base material and the radial direction of the injection holes of the plurality of air flow injection units is maintained to be the same over the entire circumference. If the plurality of air jet units are kept at the same distance, for example, the plurality of air jet units may be moved in the radial direction while being arranged parallel to the rotation axis of the substrate before stopping the movement in the axial direction.
The number of the air jet heads 142 and the moving units of the air jet units may be 1 or may be plural. In the case of a mobile unit including a plurality of air jet units, each mobile unit preferably operates in a linked manner. From this point of view, the number of moving units of the air flow jetting unit is preferably 1.
The direction of movement of the airflow jet head 142 may be a direction different from the axial direction of the cylindrical base material 111 as long as the airflow is jetted to the entire circumferential surface of the cylindrical base material. In the drawing, the airflow jet section 141 is provided in one row, but may be provided in a plurality of rows.
As the gas G, inert gases such as dry air and nitrogen can be used.
In the coating apparatus of the present invention, it is further preferable that the means for controlling the pressure of the ejected air flow includes a determiner for determining a start point and/or an end point of movement in conjunction with the movement means of the air flow ejecting means, and a controller for storing information of the movement amount of the movement means and the pressure of the air flow and executing a program of a predetermined scan. Preferably, regarding the area where the flattening treatment of the coating film is performed by 1 air jet unit, the moving start point and the end point of the other air jet unit adjacent in the moving direction are determined, and information of the moving amount of the moving unit and the pressure of the air stream is input to perform a predetermined scan so that the flattening treatment of the coating film is performed in all the areas. As described above, the air jet unit for jetting the air flow to a part of the peripheral surface of the cylindrical substrate is provided, and the air flow is stably jetted to the entire peripheral surface of the coating material by the plurality of air jet units, the moving unit and the rotary driving unit, whereby the planarization treatment of the film surface can be performed in a short time, and the coating film can be formed on the entire periphery of the cylindrical substrate with high productivity.
In addition, the coating apparatus of the present invention may further include a mechanism for adjusting the temperature of the substrate, the coating unit, the air jet unit, and the like from the viewpoint of stabilizing the formation of the coating film. Further, a measuring device for monitoring the thickness of the coating film in the case of flattening the coating film and an inspection machine for inspecting the thickness of the coating film may be provided.
< Coating method and planarization Process >
By performing a coating method of a coating material and a planarization treatment of the coating film using the coating apparatus 100 having the above-described configuration, a flat coating film is formed over the entire circumference of the columnar base 111 in a short time.
First, a coating method will be described. In the paint filling step, paint is filled into the piping connecting the metering pump 123, the coating head 122, the discharge nozzle 121, and the constituent members by filling paint into the paint tank 124 shown in fig. 4. In the coating operation step, after the cylindrical base material 111 is fixed to the rotation support shafts 112 and 113, in the coating apparatus 100 shown in fig. 1 to 4, the coating head 122 for discharging the coating material is moved in the axial direction of the cylindrical base material 111 while rotating the cylindrical base material 111 about the axis of the cylinder, whereby the coating material F is applied to the peripheral surface of the base material. The application range of the present invention is not particularly limited, but the viscosity of the coating is preferably 100cP to 10 ten thousand cP, more preferably 500cP to 5,000cP, and the film thickness immediately after coating is 20 μm or less.
At this time, the film thickness of the paint F to be targeted is determined, and the discharge amount of the paint F, the rotational speed of the cylindrical substrate 111, and the Y-direction moving speed of the coating head 122 are appropriately set. The set value of each amount is determined in consideration of the paint scattering property in the circumferential direction, the paint placement position accuracy on the circumferential surface of the cylindrical base 111, and the productivity. As a result, the coating material F is formed into any one of a flat coating film, a coating film having an uncoated portion shown in fig. 5 (a), and a coating film having irregularities shown in fig. 5 (b) according to the combination of the coating material physical properties and the respective set amounts. When the coating film has a coating stripe, a planarization treatment is performed to collide the air flow to the coating material F. However, when the coating viscosity is high and the target film thickness is thin, the energy required for planarization is large, and the movement speed of the air flow jet unit needs to be slow, so that the planarization treatment time is long. In this case, the planarization by the plurality of air flow jetting portions according to the present invention can shorten the planarization time.
At this time, the surface coated with the paint is a flat surface in which the spiral coating stripe is spirally extended in the front-rear-left-right direction. As described in fig. 1, from the viewpoint of uniformly flattening the coating film, it is preferable to apply the coating film over the entire width of the entire circumference, and then flatten the coating film while moving the air jet unit in the axial direction of the cylindrical substrate 111 using a plurality of air jet units and their moving units and driving units.
After the paint F is discharged to form a coating film, the method comprises the steps of: while rotating a cylindrical substrate at a speed different from the rotational speed at the time of coating, a plurality of air flow jetting units jetting air flows toward a part of the peripheral surface of the cylindrical substrate are used, and the air flows are jetted while the plurality of air flow jetting units are linearly moved in the axial direction of the cylindrical substrate. The present step is a step of planarizing the coating material F on the peripheral surface of the substrate.
In the step of ejecting the air flow, the plurality of air flow ejecting units are arranged at regular intervals in the axial direction, and the plurality of air flow ejecting units eject the air flow simultaneously while linearly moving at the same speed in the axial direction, and the air flow is ejected over the entire periphery of the coated paint to planarize the paint F and form the coating film. In the coating method of the present invention, since the air flows are sprayed from the plurality of air flow spraying units to the entire periphery of the coated material, the range covered by the sprayed areas of the air flows is narrow with respect to the entire periphery of the coated material after the coated material is coated, and the planarization time is shortened, thereby improving the productivity.
A step of planarizing a coating film by spraying an air stream will be described with reference to fig. 6. As shown in fig. 6 (a), after the coating is completed, the moving unit of the air jet unit is driven to move the air jet head 142 to a predetermined start position. At this time, the air flow jet part 141 located at the leftmost end in the Y direction is located at the leftmost end of the paint F on the peripheral surface of the cylindrical base 111. Then, the cylindrical substrate 111 is rotated at a rotation speed suitable for the planarization process, and movement of the air flow jet part 141 in the axial direction of the cylindrical substrate 111 is started at a predetermined speed. The columnar substrate 111 is rotated at a different rotational speed from that at the time of coating by rotational driving. The rotation speed is preferably small from the viewpoint of moving the coating film by the air flow.
At the same time, the pressure control unit 143 controls the gas supply pressure so that the supply pressure increases from 0 to a predetermined supply pressure, and the gas G is injected. Then, the gas jet part 141 as the gas jet means moves while the liquid of the coating film is flowing on the collision surface by the collision of the gas G against the coating film and the liquid surface of the coating film is kept pressed against the peripheral surface by the pressure of the gas G, and the liquid flow from the start point to the destination of the movement is applied, thereby promoting the planarization of the coating film. When the plurality of air jet units 141 are incorporated in the air jet head 142, they are easily arranged at regular intervals in the axial direction, and the plurality of air jet units are easily moved linearly at the same speed in the axial direction while jetting the air. At this time, the gas jet head 142 provided with the plurality of gas jet portions 141 is preferably oriented in a direction perpendicular to the coating film so that the pressing pressure generated by the gas G is greatly generated. Further, since the liquid flow is more likely to occur as the moving speed of the gas jet head 142 is slower, the gas jet head 142 can be moved while simultaneously jetting the gas G from the plurality of gas jet sections 141, and thus the planarization treatment of the coating film can be performed in a short time over a wide range even at a slow moving speed.
That is, in the film thickness shape of the streak-like coating liquid shown as an example in fig. 8 (a), the plurality of air flow jetting units of the present invention are provided to jet air flow while simultaneously moving in a state where the plurality of air flow jetting units are kept at a constant interval in the axial direction, whereby the coating streak can be efficiently and uniformly flattened. In other words, if the jet holes of the air flow arranged at regular intervals in the axial direction are not moved simultaneously in the axial direction, the striped film thickness shape remains as shown in fig. 8 (d), and the effect of flattening is not obtained.
Then, as shown in fig. 6 (b), when the gas jet part 141 is moved to a predetermined stop position and the gas jet to the whole coating surface is completed, the driving of the moving means of the gas jet means and the rotation driving of the cylindrical substrate 111 are stopped, and the gas supply pressure is controlled by the pressure control means 143 so that the supply pressure is reduced to 0, and the jetting of the gas G is stopped. The position where the airflow jet part 141 is stopped is preferably inputted in advance to the controller 154 that controls the movement of the airflow jet unit, and the movement is stopped. The stop position is set so as to exceed at least the position where the other airflow jet part 141 adjacent in the moving direction initially moves.
In this planarization step, the distance of movement in the axial direction of the cylindrical substrate 111 of the airflow jet part 141 is the sum of the axial distance of the substrates between the airflow jet parts and the length of the film passing through the other adjacent airflow jet parts to planarize. From this relationship, it is effective to shorten the number of the air jet parts and to shorten the axial distance between the substrates between the air jet parts and the length of the coating film to be passed over the other adjacent air jet parts for planarization in order to shorten the planarization time.
Here, when a more precise flat surface is formed, the other air jet part passes through the air jet part and is on the flat coating film, and the air jet part is stopped on the flat coating film, but when the supply pressure is constant, a thick film part (a stop position coating stripe) in the form of an integrated liquid shown in fig. 5 (c) may be generated at the stop position.
This phenomenon may occur even when air is uniformly blown by slit-type air nozzles over a wide range. If the slit width is smaller than the width of the coating film, the coating film pressed by air may spread so as to be pressed toward the coating end, and streak-like coating unevenness may occur outward from both ends of the slit width. When both ends of the formed coating film are cut off by post-processing, coating unevenness at the ends is less likely to be a problem. However, when high accuracy of thickness uniformity is required over the entire width, the following conditions are preferable in which coating unevenness does not occur.
In this case, the thick liquid film portion is generated by the liquid flow caused by the collision of the gas G, and the larger the ejection pressure of the gas G is, the larger the amount thereof is. That is, the greater the ejection pressure at the end of the planarization process, the more likely the thick film portion remains. Therefore, in order to improve the thick film portion, that is, to improve the coating unevenness, it is preferable to form a flatter film surface without leaving a thick film portion as shown in fig. 5 (c) by gradually reducing the supply pressure without stopping the processing operation immediately after flattening the entire coating film at the supply pressure required for the flattening process. That is, it is preferable that the plurality of air flow jetting means move in the axial direction while jetting an air flow of a constant supply pressure, and the amount of movement of the coating film is alleviated by continuously reducing the supply pressure of air from the constant supply pressure in a section from after the flattening treatment of the entire coating film to before the movement is stopped. Thus, the thick film portion can be prevented from being generated when the processing operation is stopped by dispersing and consuming the coating liquid of the thick film portion generated by the ejection pressure on the coating film.
As an example, fig. 7 (a) shows a relationship between the supply pressure and the moving distance of the airflow ejecting unit. As described in the graph, the gas G can be injected at a constant supply pressure until the movement distance reaches X1, and after the movement distance reaches X1, the supply pressure is continuously reduced to reduce the collision force of the gas flow, thereby forming a flat coating film while reducing the movement amount of the coating material.
In addition, as a similar means, there is also a method of increasing the moving speed of the airflow ejecting portion. By increasing the movement speed, the magnitude of the liquid flow caused by the collision of the gas G decreases even in a state where the injection pressure is constant, and therefore the same effect as in the case where the injection pressure decreases can be obtained.
This example is shown in fig. 7 (b). This is a graph showing the relationship between the moving speed and the moving distance of the air flow jetting portion 141, that is, the air flow jetting unit. In the control operation, the gas G is injected at a constant moving speed until the moving distance reaches X1, and after the moving distance reaches X1, the moving speed is continuously increased to reduce the collision force of the gas flow, and the movement amount of the paint is reduced to form a coating film. When the movement is stopped, the supply pressure is preferably substantially zero. The movement distance X1 for starting the decrease in the supply pressure and the rate of decrease in the supply pressure in fig. 7 (a) are set to values that enable the planarization of the coating stripe shown in fig. 5 (a) or (b) and the planarization of the coating stripe in the liquid product state shown in fig. 5 (c). The constant moving speed of the graph shown in fig. 7 (b) is set to a value at which the coating stripes shown in fig. 5 (a) or (b) are flattened based on the constant rotational speed of the cylindrical substrate and the constant supply pressure. The movement distance X1 and the rate of increase in the movement speed at which the increase in the movement speed is started in fig. 7 (b) are set to values at which the coating stripes shown in fig. 5 (a) or (b) can be flattened and the liquid-integrated coating stripes shown in fig. 5 (c) can be flattened.
In the step of jetting the air flow for flattening the coating film, in order to stably move the air flow jetting portion 141 as the air flow jetting means at a low speed, the air flow jetting head 142 is mounted on the stage 151 and the slider 152, and can be moved by driving the actuator 153 provided at the stage end. The movement amount, the stop information, and the driving of the actuator 153 are preferably controlled by the controller 154 for controlling the movement. In order to continuously reduce the supply pressure after the movement distance reaches X1, it is also preferable to send a signal from the controller 154 for controlling movement to the pressure controller 143 for air flow injection to reduce the injection pressure and thereby alleviate the movement of the coating film.
< Curing of coating film >
After the planarization treatment of the coating film, the curing treatment of the coating film is performed to stop the flow of the coating liquid. The curing method is not limited to the method such as heat curing and UV irradiation curing, but is preferably performed while maintaining a rotating state in order to suppress the flow of the flattened liquid.
< Shape of substrate >
The cylindrical substrate to which the present invention is applied may be any substrate having a cylindrical shape, and may be a hollow cylindrical substrate.
< Application to the production of an Anhydrous lithographic printing plate precursor >
As an effective application of the present invention, there is an application to a process for producing an anhydrous lithographic printing plate precursor for anhydrous printing, which includes a process of applying a high-viscosity coating material as a thin film on a cylindrical substrate. Since the waterless printing uses no wet water containing an organic solvent in the printing step, the waterless printing is known as an environmentally friendly printing method, but in recent years, a method of forming a functional film without using an organic solvent as much as possible in the production step of a master in addition to the printing step has been demanded. When dilution of the coating material with an organic solvent is limited, it is necessary to cope with the increase in viscosity of the coating material and to apply the coating material in a thin film manner. The step of coating the surface layer of the organic silicon film, which is a functional film constituting the waterless lithographic printing plate precursor, is also one of the steps, and by applying the present invention, a uniform thin film can be formed.
In the process for producing a waterless lithographic printing plate precursor, a cylindrical substrate of the present invention is coated with a coating material of an organic silicon material as a coating material by the above-described coating method using a precursor substrate before the formation of an organic silicon layer, and the coating material is thinly spread by a flattening unit, whereby a uniform coating film can be formed. The coating film formation conditions at this time are described in example 4.
Examples
Hereinafter, examples of specific embodiments of the present invention will be described, but the present invention is not limited to these examples.
Example 1 ]
A coating film was formed on a cylindrical substrate using a coating apparatus having the same configuration as that shown in fig. 1 to 4. A cylindrical substrate having an outer diameter of 185mm was set in a coater and rotated at 400 rpm. Next, the coating material was disposed on the peripheral surface so that the film thickness became 5.0 μm when a flat coating film was uniformly formed on the peripheral surface of the cylindrical substrate. A coating having a shear viscosity of 1X 10 3 cP (temperature 23 ℃ C.) was used. The paint was spirally arranged on the peripheral surface of the cylindrical base material by moving the cylindrical base material in parallel with the axis direction of the cylindrical base material by 10.7 mm/sec while discharging the liquid column at a discharge amount of 31. Mu.l/sec by using a nozzle having an outlet diameter of 0.25 mm.
In this case, in order to improve the positioning accuracy, the nozzle is directed in the rotation direction of the cylindrical substrate, and the coating is performed such that the gap between the nozzle tip and the cylindrical substrate with respect to the radial direction of the cylindrical substrate is set to 2 mm. As a result, the coating materials are not bonded to each other on the peripheral surface of the cylindrical base material, and an uncoated portion 201 between the coating material and the adjacent coating material shown in fig. 5 (a) is generated. The coating and planarization treatments were performed at room temperature of 23 ℃.
In the present embodiment, the air jet unit includes a plurality of air jet units 141 arranged in the axial direction of the columnar base material. As shown in fig. 3, the plurality of air jet units 141 are mounted on the air jet head 142, and are connected to a stage 151, a slider 152, and an actuator 153 as a moving mechanism. The air flow injection part 141 is provided at a tip end with an injection hole for injecting an air flow in a nozzle shape.
After the arrangement of the paint, the planarization treatment of the paint is performed using the plurality of air flow ejection portions 141. The rotational speed of the cylindrical substrate was reduced to 25rpm. The gap between the substrate and the columnar substrate was set to 5mm. The air flow obtained by pressurizing the air was injected from each injection hole so that the pressure at the time of collision with the peripheral surface became 140kPa, and the plurality of air flow injection portions 141 were moved in parallel in the axial direction at a moving speed of 0.20 mm/s.
Specifically, the air jet units, that is, the air jet units were adjusted so that the pitch between the air jet units was 20mm, the number of the jet units was 16, and the air flow rate of air jetted from each air jet unit was equal, and then the air jet units were arranged along the axial direction of the cylindrical base material. The shape of the air jet part was a conical nozzle shape, and the outlet diameter was 1.6mm. The length of the air jet part passing over the flattened coating film of the other adjacent air jet part was 20mm, and the moving distance of the air jet unit, that is, the air jet part was 40mm. In the region of 0mm to 40mm, the air flow was injected at a supply pressure of 0.19 MPa.
Through the above steps, the uncoated portion 201 between the paint and the adjacent paint can be flattened in appearance. In the case where the number of gas jet units is 1, the planarization time is approximately 5000 seconds (about 1.4 hours) per 1m length of the cylindrical substrate. On the other hand, in the case where a plurality of air jet units are provided so that the air jet unit-to-air jet unit pitch is 20mm, the planarization time may be 200 seconds (about 3 minutes) per 1m of the length of the cylindrical substrate. That is, by providing a plurality of air flow jetting portions, the planarization time can be reduced to 1/25 of the time when the number of air flow jetting portions is 1.
Example 2]
A coating film was formed on a cylindrical substrate using a coating apparatus having the same configuration as that shown in fig. 1 to 4. The pressure of the pressurized air in the nozzle-shaped air jet unit as the air jet unit is adjusted. The adjustment was performed in the same manner as in example 1, except that the supply pressure was constant in the range of 0 to 10mm from the movement start position and was linearly reduced to 0.11MPa in the range of 10 to 40mm based on the graph shown in fig. 7 (a).
By providing a plurality of air jet units, the planarization time can be reduced as compared with the case where there are 1 air jet units. Further, by controlling the supply pressure, the occurrence of the thick liquid film portion shown in fig. 5 (c) can be suppressed at each position where the plurality of air flow ejecting portions are stopped. Regarding the film thickness shape at the stop position of the air flow ejecting section, the film thickness shape in example 1 is shown in fig. 8 (b), and the film thickness shape in example 2 is shown in fig. 8 (c). That is, (b) is the film thickness shape in the case where the supply pressure control is not performed, and (c) is the film thickness shape in the case where the supply pressure control is performed. By performing the supply pressure control of example 2, the maximum value of the film thickness in the vicinity of the stop position of the air flow ejecting portion was reduced from 6.0 μm to 5.2 μm, and a more uniform and high-quality coating film surface was formed. Here, even if the moving speed of the air flow jetting portion is controlled based on the graph shown in fig. 7 (b), the same effect is obtained.
Example 3 ]
A coating film was formed on a cylindrical substrate using a coating apparatus having the same configuration as that shown in fig. 1 to 4. The procedure of disposing the paint on the peripheral surface of the cylindrical substrate in a spiral manner was the same as in example 1.
Then, the rotational speed of the cylindrical base material is reduced. Then, a gap between the air jet unit and the cylindrical substrate is set, and the air jet unit after air pressurization is moved in parallel at a constant speed. The air jet units were adjusted so that the interval between the air jet units was constant and the air flow rate of air jet from each air jet unit was the same as in example 1, and then the plurality of air jet units were arranged along the circumferential direction of the cylindrical base material, and the air jet units were multiplexed in the circumferential direction. Then, the supply pressure was set to be constant, and the air flow was injected.
Through the above steps, the uncoated portion 201 between the paint and the adjacent paint can be flattened in appearance. Further, since the airflow jet means is multiplexed in the circumferential direction, the time for jetting the airflow in the rotational direction becomes longer, and the moving speed in the axial direction can be increased as compared with the moving speed of the airflow jet means of embodiment 1. By providing a plurality of air jet units, the planarization time can be reduced as compared with the case where there are 1 air jet units.
Example 4 ]
Using a manufacturing apparatus having the same structure as that shown in fig. 1 to 4, an waterless lithographic printing plate precursor was manufactured. The silicone coating is applied to the cylindrical substrate to form a layer. The cylindrical substrate before the silicone coating was applied had a size of 185mm in outside diameter and 1000mm in axial length. A silicone coating is used. The silicone coating was applied by using a nozzle having an outlet diameter of 0.25mm in the same manner as in example 1, and the silicone coating was applied to the peripheral surface of the cylindrical substrate in an amount of 5.0 μm by moving the cylindrical substrate in parallel at 10.7 mm/sec in the axial direction while discharging the silicone coating in a liquid column shape. Next, by performing planarization treatment of the silicone coating film using the same configuration of the gas flow jet part 141 as in example 1 under the same conditions as in example 2, the silicone coating film having the entire width in the axial direction was planarized for 200 seconds, and a uniform silicone layer of 5.0 μm was formed. In addition, even if a layer having a different coating is formed in advance on a cylindrical base material, the same effect is obtained. In addition, the silicone coating was prepared by the following method.
< Silicone paint >
The following components (a-1), (b-1) and (c-1) were put into a sealable container, and the container was sealed and then stirred and mixed at room temperature until the components became uniform. The component (d-1) was added to the obtained composition, and the vessel was sealed and then stirred and mixed at room temperature until the components became uniform, whereby a coating material was obtained.
(A-1) DMS-V31 (both terminal dimethylvinylsiloxy-polydimethylsiloxane, weight average molecular weight: 28,000, average number of vinyl groups in molecule: 2, manufactured by GELEST Inc.:): 95.89 parts by mass
(B-1) "DOWSIL" (registered trademark) SRX212 Catalyst (platinum mixture, manufactured by dow-family, ltd): 0.11 part by mass
(C-1) 3, 5-dimethyl-1-hexyn-3-ol (manufactured by kygenization into a product of the trade company): 0.30 part by mass
(D-1) "SILATIC" (registered trademark) RD-1Catalyst (trimethylsiloxy-methylhydrosiloxane/dimethylsiloxane copolymer at both ends, weight average molecular weight: 750, average SiH number in the molecule: 5, manufactured by Waldfish, inc.): 4.00 parts by mass.
Comparative example 1 ]
The procedure of disposing the paint on the peripheral surface of the cylindrical substrate in a spiral manner was the same as in example 1.
Then, the rotational speed of the cylindrical base material is reduced. As the air jet means, slit nozzles having substantially the same width as the base material are used. The wide slit nozzle was arranged so that the longitudinal direction thereof matches the axial direction of the cylindrical base material, and the position thereof was fixed. No movement in the axial direction is performed. The supply pressure was set to be constant, and the air flow was injected.
As a result, the amount of paint movement in the axial direction becomes insufficient, and the coating film cannot be flattened. Although the amount of paint movement in the circumferential direction of the cylinder is large, the amount of paint movement in the axial direction becomes insufficient because there is no movement of the airflow jet part in the axial direction of the cylinder. In addition, coating unevenness occurs at the slit end.
Comparative example 2 ]
The procedure of disposing the paint on the peripheral surface of the cylindrical substrate in a spiral manner was the same as in example 1. Then, the rotational speed of the cylindrical base material is reduced. As the air flow jet means, the plurality of air flow jet portions 141 shown in example 1 and fig. 3 were arranged at intervals of 5mm narrower than that of example 1 over the entire width of the cylindrical base material, and the air flow was jetted while the supply pressure was kept constant without moving in the axial direction. That is, the air flow is injected from each injection hole in a state where the movement of the injection hole (air flow injection portion) of the air flow as the air flow injection unit is stopped. Fig. 8 (a) shows the film thickness shape before the flow injection, and fig. 8 (d) shows the film thickness shape after the flow injection. The film thickness was flattened as a result: as shown in fig. 8 (d), the amount of paint movement in the axial direction was insufficient, and the thickness unevenness at the time of coating was not flattened and remained in the thickness range of 3.0 to 7.0 μm.
Description of the reference numerals
100: Coating device
110: Rotary drive unit
111: Cylindrical base material
112. 113: Rotation center shaft
114. 115: Supporting table
116: Actuator with a spring
117: Rotational speed controller
121: Discharge nozzle
122: Coating head
123: Constant delivery pump
124: Paint pot
131: Carrier table
132: Sliding device
133: Actuator with a spring
134: Controller for controlling movement of coating unit
141: Air flow jetting part
142: Air flow jet head
143: Pressure controller for air jet
144: Compressed gas supply source
151: Carrier table
152: Sliding device
153: Actuator with a spring
154: Controller for controlling movement of air jet unit
200: Uneven coating
201: Uncoated portion between paint and adjacent paint
202: Coating stripes
F: coating material
G: gas and its preparation method
R: direction of rotation
P: direction of linear movement
Claims (10)
1. A coating device, which comprises a coating device, a coating machine and a coating machine,
Comprises at least 1 coating unit for coating the coating material on the circumferential surface of a cylindrical substrate, at least 1 rotation driving unit for rotating the cylindrical substrate around the axis of the cylinder, at least 1 airflow spraying unit for spraying airflow on a part of the circumferential surface of the cylindrical substrate, and at least 1 moving unit capable of enabling the airflow spraying unit to move in a mode of spraying airflow on the circumferential surface of the coating material,
The air jet unit includes a plurality of air jet units, and the air jet unit, the moving unit, and the rotation driving unit jet air to the whole area of the peripheral surface of the coating material.
2. The coating apparatus according to claim 1,
The coating unit includes a moving unit that moves the discharge hole of the coating material in a direction different from a direction in which the peripheral surface of the substrate is rotated by the rotation driving unit, and the coating material is coated by moving the moving unit, and the movement of the discharge hole by the moving unit included in the coating unit and the movement of the air jet unit by the moving unit that moves the air jet unit can be independently controlled.
3. The coating device according to claim 1 or 2,
The plurality of air jet units are arranged at regular intervals in a direction parallel to the rotation axis of the cylindrical base material, and each air jet unit is spaced apart from the circumferential surface of the cylindrical base material by a regular interval in the radial direction.
4. The coating device according to claim 1 or 2,
The air flow jetting unit further includes a unit for controlling the pressure of the air flow to be jetted or the distance between the jetting portion of the air flow and the peripheral surface of the coating material.
5. The coating device according to claim 1 or 2,
The moving unit that enables the air jet unit to move further includes a unit for controlling a moving distance and/or a moving speed of the air jet unit.
6. The coating device according to claim 1 or 2,
The means for controlling the pressure of the air flow to be injected includes a determiner for determining a start point and/or an end point of movement in conjunction with a movement means of the air flow injection means, and a controller for storing information on the amount of movement of the movement means and the pressure of the air flow and executing a program for performing a predetermined scan.
7. A method for forming a coating film, characterized by,
While rotating a cylindrical base material about a cylindrical axis, paint is discharged from a paint discharge hole that moves linearly in the axial direction to the peripheral surface of the cylindrical base material to form a coating film,
Thereafter, the method comprises the following steps: a plurality of air jet units for jetting air flow toward a part of the peripheral surface of the cylindrical base material are used while rotating the cylindrical base material at a speed different from the rotational speed at the time of coating, the air jet units are linearly moved in the axial direction of the cylindrical base material while jetting air flow,
In the step of ejecting the air flow, a plurality of air flow ejecting units are arranged at regular intervals in the axial direction, and the plurality of air flow ejecting units are moved linearly in the axial direction at the same speed while ejecting the air flow simultaneously, so that the air flow is ejected over the entire periphery of the coating material.
8. The method for forming a coating film according to claim 7, wherein,
The plurality of air flow injection units are air nozzles for injecting air flow from injection holes, and move in the axial direction at a certain moving speed while injecting air flow at a certain supply pressure or a certain flow rate, and continuously reduce the supply pressure or the flow rate of the air from the certain supply pressure or the certain flow rate before stopping the movement.
9. The method for forming a coating film according to claim 7, wherein,
The plurality of air jet units are air jet nozzles for jetting air from jet holes, the plurality of air jet units move in the axial direction at a certain moving speed while jetting air with a certain supply pressure, and the moving speed is continuously increased from the certain moving speed before the moving is stopped.
10. A method for producing an anhydrous lithographic printing plate precursor, characterized by,
The method for forming a coating film according to any one of claims 7 to 9, wherein a coating film made of an organosilicon material is formed on the peripheral surface of the columnar base material.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2021171475 | 2021-10-20 | ||
| JP2021-171475 | 2021-10-20 | ||
| PCT/JP2022/038350 WO2023068190A1 (en) | 2021-10-20 | 2022-10-14 | Coating apparatus and coating-film forming method |
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| CN117940221A true CN117940221A (en) | 2024-04-26 |
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| CN202280062168.8A Pending CN117940221A (en) | 2021-10-20 | 2022-10-14 | Coating apparatus and coating film forming method |
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| CN (1) | CN117940221A (en) |
| WO (1) | WO2023068190A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59196781A (en) * | 1983-04-22 | 1984-11-08 | Sekisui Chem Co Ltd | Formation of coating film on outer surface of tubular body |
| JP3407389B2 (en) * | 1994-02-21 | 2003-05-19 | 弘 今村 | Coating equipment |
| JP2004261666A (en) * | 2003-02-28 | 2004-09-24 | Ricoh Co Ltd | Paint film forming apparatus |
| JP2006055778A (en) * | 2004-08-20 | 2006-03-02 | Fuji Xerox Co Ltd | Coating method for resin solution, and production methods for thermosetting-resin endless belt and thermosetting-resin fixation belt |
| JP6272408B2 (en) * | 2016-07-28 | 2018-01-31 | 株式会社クボタ | Pipe exterior coating equipment |
| JP6580170B2 (en) * | 2018-01-23 | 2019-09-25 | 株式会社クボタ | Pipe outer surface coating apparatus and method |
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