JP4787041B2 - Coating film forming device - Google Patents

Description

  The present invention relates to a coating film forming apparatus that forms a coating film by applying a coating to a cylindrical outer peripheral surface of an object to be coated. For example, in an image forming apparatus employing an electrophotographic system such as a PPC (plain paper copying machine), LBP (laser beam printer), facsimile, etc., a fixing member (fixing) that fixes an unfixed toner image on the transfer paper by heating and pressing. The present invention relates to a coating film forming apparatus suitable for forming a release layer or a primer layer of a roller or a fixing belt.

  In an image forming apparatus such as a copying machine and a printer based on the principle of electrophotography, a fixing process is performed in which a transfer paper is narrowed and toner is melted by heat and fixed on the transfer paper. In recent years, parts (fixing roller or fixing belt) used in the fixing process include an elastic layer (having a thickness of about 100 μm to 300 μm) made of a heat-resistant rubber such as silicone rubber on a base, and an elastic layer on the elastic layer. The formed primer layer, a release layer (thickness of about 20 μm to 30 μm) made of a fluororesin, and the like are sequentially formed.

  As a method for forming the release layer described above, spray coating is generally used in which spraying is applied by spraying. However, spraying has a coating efficiency of about 20% to 30% (the proportion of paint that actually adheres to the object to be coated), and about 70% to 80% of the paint used for painting is used. Therefore, the efficiency of the paint is very poor, and a very large amount of paint is required. Also, fluororesin is difficult to paint, and spraying a coating of 20 μm to 30 μm at a time will cause surface defects such as repelling the paint, so how many thin layers are needed to form the release layer described above In addition, it was necessary to paint repeatedly, and the working time tended to be longer.

  On the other hand, dip coating is conceivable as a method of compensating for these drawbacks. This dip coating is a system in which a coating is formed by immersing and lifting the object to be coated in a liquid tank containing the paint, so that the coating efficiency is 90% or higher, and the coating efficiency is very high. There is little waste of paint at the time. However, this dip coating requires a liquid amount that allows the object to be completely immersed in the liquid tank, so that the parts used in the fixing process of the image forming apparatus described above are completely immersed in the axial direction. Has a disadvantage that a liquid tank having a depth of about 500 mm is required, and a large amount of paint is required.

A coating apparatus (for example, shown in Patent Documents 1 to 3) that avoids all of the above-described drawbacks has been proposed. This type of coating apparatus realizes dip coating with a small amount of paint by sealing the liquid tank and moving it relative to the object to be coated. The above-described coating apparatuses disclosed in Patent Documents 1 to 3 can continuously coat a plurality of objects to be coated arranged coaxially, and, of course, coat the objects to be coated one by one. Is also possible.
JP-A-8-23698 JP 2004-279918 A Japanese Patent Laid-Open No. 2004-290853

  In the above-described coating apparatuses disclosed in Patent Documents 1 to 3, a cylindrical object to be coated made of an aluminum alloy used as a photoreceptor used in a relatively compact image forming apparatus is coated. . For this reason, in Patent Documents 1 to 3, it is difficult to form a coating film having a certain thickness on the outer periphery of an object to be coated that is relatively thin and easily deformed.

  Accordingly, an object of the present invention is to provide a coating film forming apparatus capable of easily forming a coating film having a certain thickness on the outer peripheral surface of an object to be coated which is relatively thin and easily deformed.

The film forming apparatus according to claim 1 in order to solve the aforementioned problems, a holding section axis of the object to be coated of the cylindrical holding the object to be coated so as to be vertically and parallel, before serial and coating head which is formed in a box-shaped ring for housing the coating to apply the coating material to the outer peripheral surface of the front Symbol object to be coated through a coating target inwardly, the object to be coated and in contact with An elastically deformable annular seal member attached over the entire circumference of the inner circumferential surface of the coating head so as to keep watertight between the object to be coated, a support base that supports the coating head, A moving unit that relatively moves the holding unit and the support base along the axis, and a movement that supports the coating head movably along the direction perpendicular to the axis with respect to the support base. a support portion, a film forming apparatus having, of the coating head A peripheral surface is cut out over the entire periphery, and a mandrel that inserts into the object to be coated and supports both ends of the object to be coated from the inside is sandwiched between the mandrel. In this way, a pair of holding members inserted at both ends of the object to be coated and a pressing portion that presses the pair of holding members in a direction in which the pair of holding members approach each other are provided. It is said.

The coating film forming apparatus according to claim 2 is the coating film forming apparatus according to claim 1 , wherein the mandrel is inserted into both ends of the object to be coated, and a pair of disk members and a center of the disk member It is characterized and the shaft member connected to part each other, in that it comprises.

The coating film forming apparatus according to claim 3 is characterized in that, in the coating film forming apparatus according to claim 2 , an outer diameter of the disk member is formed larger than an inner diameter of the object to be coated. .

The coating film forming apparatus according to claim 4 is the coating film forming apparatus according to any one of claims 1 to 3 , wherein one holding member of the pair of holding members is the object to be coated. A seal member that keeps watertight between the object to be coated at an end inserted into the object, and the other holding member of the pair of holding members is an end into which the object is inserted into the object to be coated It is characterized in that it comprises a gradually tapered to become tapered portion toward the interior of該被coated article in parts.

The coating film forming apparatus according to claim 5 is the coating film forming apparatus according to any one of claims 1 to 4 , wherein the support base is disposed below the coating head. And an outer edge convex portion standing from the outer edge of the base body and having a tip portion disposed above the coating head, and the movement support portion is disposed between the base body and the coating head. A first rolling element that is rollable with respect to both of them, and a second rolling element that is disposed between the tip of the outer edge convex portion and the coating head and is rotatable with respect to both of them. It is characterized in that it comprises, when.

The coating film forming apparatus according to claim 6 is the coating film forming apparatus according to any one of claims 1 to 4 , wherein an adjustment position that allows entry into the coating head and the coating head. A reference positioning member provided movably over the retracted position, a first state in which the coating head is movable with respect to the support base, and a first state in which the coating head is fixed to the support base. And a control unit, and the reference positioning member is attached to the coating head by being passed through the coating head at the adjustment position. The coating head is configured to position the coating head at a reference position with respect to the support base by interfering with a seal member, and the control unit is configured to switch the movable fixing unit to the second state. And means for positioning the positioning member at the adjustment position, means for passing the positioning member positioned at the adjustment position by the moving portion into the coating head, and the positioning member passed through the coating head. And means for switching the movement fixing unit to the first state in a state .

According to the coating film forming apparatus of claim 1, the movable support portion allows the coating head to move in a direction perpendicular to the axis with respect to the support base, and elastically deforms to the entire circumference of the inner peripheral surface of the coating head. Since the flexible seal member is provided, the coating head is positioned at a position where the elastic restoring force of the seal member becomes uniform in the circumferential direction by the elastic restoring force of the seal member. Therefore, the force that the sealing member presses the object to be coated is uniform in the circumferential direction, and the force that the sealing member presses can be prevented from concentrating on a part, even if the object to be coated is thin, The object to be coated can be prevented from being deformed, and the distance between the coating head and the object to be coated is made uniform in the circumferential direction by the elastic restoring force of the sealing member described above. A coating film having a thickness can be formed. Therefore, a coating film having a certain thickness can be easily formed on the outer periphery of an object to be coated which is relatively thin and easily deformed.

The holding portion includes a mandrel that is inserted into the object to be coated and supports both ends of the object to be coated from the inside, and a pair of holders that are inserted at both ends of the object to be sandwiched between the mandrels. Since the member and the pressing portion that presses the pair of holding members in a direction in which the pair of holding members approach each other are provided , the object to be coated can be reliably supported.

According to the coating film forming apparatus of claim 2 , the mandrel includes a pair of disk members that support both ends of the object to be coated from the inside, and a shaft member having a smaller diameter than the disk members that connect the disk members to each other. Therefore, only the disk member comes into contact with the object to be coated, so that the contact area between the mandrel and the object to be coated can be suppressed.For this reason, when the object to be painted is attached to the mandrel, Unreasonable force can be prevented from acting on the object to be coated, and deformation of the object can be prevented even if the object to be coated is thin. Therefore, a coating film having a certain thickness can be easily formed on the outer periphery of the object to be coated which is relatively thin and easily deformed.

  In addition, since only the both ends of the object to be coated are supported by the disk member, the heat capacity when heating by a heating means or the like can be reduced, and the paint can be dried instantaneously to prevent dripping of the paint. .

According to the coating film forming apparatus of the third aspect , since the outer diameter of the disk member is larger than the inner diameter of the object to be coated, the object to be coated can be reliably held by the disk member, and It is possible to prevent the paint from entering inside. Therefore, a coating film having a certain thickness can be easily formed on the outer periphery of the object to be coated which is relatively thin and easily deformed.

According to the coating film forming apparatus of the fourth aspect , since one holding member includes the sealing member and the other holding member includes the tapered portion, it is possible to prevent the paint from entering the inside of the object to be coated. . Further, since the object to be coated can be easily pulled out from the other holding member by the line contact by the tapered portion, it is possible to prevent an excessive force from acting on the object to be coated. Therefore, a coating film having a certain thickness can be easily formed on the outer periphery of the object to be coated which is relatively thin and easily deformed.

According to the coating film forming apparatus of claim 5 , since the rolling elements are provided between the base body of the support base and the coating head, and between the outer edge convex portion of the support base and the coating head, The coating head can be reliably moved in a direction perpendicular to the axis, and therefore, the distance between the coating head and the object to be coated can be made uniform in the circumferential direction, and the coating head can be made axial with respect to the support base. And the time for immersion in the paint on the outer peripheral surface of the object to be coated can be prevented from varying along the axis, so that the outer periphery of the object to be coated has a constant thickness. A film can be formed. Therefore, a coating film having a certain thickness can be easily formed on the outer periphery of the object to be coated which is relatively thin and easily deformed.

According to the coating film forming apparatus of the sixth aspect , the control unit positions the coating head with the reference positioning member with the coating head being movable, so that the distance from the object to be coated is uniform in the circumferential direction. The application head can be positioned. Further, since the coating head is fixed to the support base after positioning the coating head, it is possible to prevent the coating head from being displaced. Therefore, a coating film having a certain thickness can be easily formed on the outer periphery of the object to be coated which is relatively thin and easily deformed.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 5, 8, and 9. 1 is a configuration diagram of a coating film forming apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the coating head of the coating film forming apparatus shown in FIG. 1, and FIG. It is a longitudinal cross-sectional view of the holding | maintenance part of the shown coating-film formation apparatus.

  In the coating film forming apparatus 1 shown in FIG. 1, a primer layer 3 (shown in FIG. 9) and an elastic layer 5 of a fixing belt 2 (shown in FIG. 8) constituting an image forming apparatus such as a copying machine are formed. This is an apparatus for forming a release layer 6 as a coating film on a substrate 4 as an object to be coated.

  The fixing belt 2 is formed in an endless shape as shown in FIG. As shown in FIG. 9, the fixing belt 2 includes an endless belt-like substrate 4 made of polyimide, Ni, etc., a primer layer 3, an elastic layer 5 made of heat-resistant rubber such as silicone rubber, and a primer. The layer 3 and the release layer 6 made of a fluororesin are sequentially laminated. The elastic layer 5 has a thickness T of about 100 to 300 μm. The release layer 6 has a thickness of about 20 to 30 μm. The thickness of the substrate 4 as the object to be coated before the release layer 6 described above is combined with the primer layer 3 described above is about 200 μm to 400 μm. That is, the base 4 described above is relatively thin and easy to deform as a whole.

In addition, the primer layer 3, the elastic layer 5, and the release layer 6 have one end in the width direction of the base 4 (upper end when a coating 7 described later is applied by the coating film forming apparatus 1) 4 a and the base 4. The other end of the width direction (
When the paint 7 is applied by the coating film forming apparatus 1, it is formed over the lower end portion 4b. The above-described fixing belt 2 is heated to press the toner against the transfer paper and fix the toner onto the transfer paper.

  The coating film forming apparatus 1 has the above-described fluorine on the outer surface of the substrate 4 (corresponding to the object to be coated in the claims) on which the primer layer 3 and the elastic layer 5 are formed, that is, on the primer layer 3 described above. A coating layer 7 (shown in FIG. 2) containing a resin and a known solvent is applied to form the release layer 6 described above.

  As shown in FIG. 1, the coating film forming apparatus 1 includes an apparatus main body 10, a holding unit 11, a moving unit 12, a coating unit 13, a reference positioning mechanism 14, a paint supply unit 15, and a cooling unit 16. The air supply part 17 and the control apparatus 18 as a control part are provided.

  The apparatus main body 10 is installed on a factory floor or the like. The apparatus main body 10 includes a plurality of horizontal plates 19, a single vertical plate 20, and a plurality of connecting columns 21. Three horizontal plates 19 are provided. The horizontal plate 19 is arranged so that both surfaces thereof are parallel to the horizontal direction. The horizontal plates 19 are arranged at intervals from each other along the vertical direction. Both surfaces of the vertical plate 20 are arranged in parallel with the vertical direction. The vertical plate 20 connects the lowermost horizontal plate 19 and the uppermost horizontal plate 19. The horizontal plate 19 located at the center is connected to the central portion of the vertical plate 20. The connecting column 21 is formed in a quadrangular column shape and connects a plurality of horizontal plates 19.

  As shown in FIG. 1, the holding unit 11 includes a mandrel 22 (shown in FIG. 3), a pair of holding members 23, one holding rod 24, and one chuck cylinder 25. As shown in FIG. 3, the mandrel 22 includes a pair of disk members 26 and a single shaft member 27. Of course, each of the disk members 26 is formed in a thick disk shape. The outer diameter of the disk member 26 is formed slightly larger than the inner diameter of the base body 4. The shaft member 27 is formed in a columnar shape, and has an outer diameter smaller than the outer diameter of the disk member 26 and the inner diameter of the base body 4. The shaft member 27 is disposed coaxially with the pair of disk members 26 and connects the pair of disk members 26 to each other. The mandrel 22 is press-fitted into the base 4 described above, and the disk member 26 supports both ends of the base 4 from the inside.

  Each of the holding members 23 is formed in a cylindrical shape as a whole. The holding member 23 includes a thick cylindrical member main body 28 and a pair of seal members 29. The seal member 29 is made of an elastically deformable synthetic resin such as rubber. The seal member 29 is formed in an annular shape, and is embedded in the both ends of the holding member 23 inserted into the base body 4 as shown in FIG. In the holding member 23, one seal member 29 is press-fitted into both ends of the base body 4 into which the mandrel 22 is press-fitted. In the holding member 23, the seal member 29 is elastically deformed, and the seal member 29 is kept watertight between the base member 4.

  The holding rod 24 is formed in a columnar shape, and is fixed to the horizontal plate 19 in a state of being erected from the horizontal plate 19 disposed at the center of the three horizontal plates 19. The holding rod 24 is formed so that its axial center is arranged in parallel with the vertical direction, and its upper end portion gradually tapers as it goes upward.

The chuck cylinder 25 includes a cylinder body 30 and a rod 31 that can protrude and retract from the cylinder body 30. The cylinder body 30 is attached to the uppermost horizontal plate 19 with the rod 31 extending downward along the vertical direction. The rod 31 is formed in a columnar shape, and its axial center is arranged in parallel with the vertical direction, and its lower end portion is gradually tapered as it goes downward. The rod 31 is disposed along the vertical direction at a position facing the holding rod 24 with a space (a position coaxial with the holding rod 24).

  When the rod 31 of the chuck cylinder 25 extends, the pair of holding members 23 and the chuck cylinder 25 are moved in a direction in which the pair of holding members 23 and the mandrel 22 approach each other. And the mandrel 22 is pressed. The holding rod 24 and the chuck cylinder 25 form a pressing portion described in the claims.

  In the holding unit 11 described above, the mandrel 22 is press-fitted into the base 4 and the holding members 23 are press-fitted into both ends of the base 4, and the base 4, the mandrel 22, the holding member 23, the holding rod 24, and the chuck are inserted. It arrange | positions between cylinders 25, and the rod 31 of this chuck | zipper cylinder 25 is expanded. The holding unit 11 holds the base body 4 with the mandrel 22 interposed between the holding rod 24 and the rod 31 of the chuck cylinder 25 via the holding member 23.

  When the holding unit 11 holds the base body 4, the axis P of the base body 4 (indicated by a one-dot chain line in FIG. 1) is parallel to the vertical direction. When the holding unit 11 holds the base body 4, the outer peripheral surface 4 c of the base body 4 has a cylindrical surface shape (a cross-sectional shape in a direction perpendicular to the axis P is an arc shape). As described above, the holding unit 11 holds the base body 4 in a state where the axis P is parallel to the vertical direction. The holding unit 11 extends the rod 31 of the chuck cylinder 25 to hold the base 4 via the mandrel 22 and the like, and reduces the rod 31 of the chuck cylinder 25 and passes the mandrel 22 and the like. The base 4 is detachable. Furthermore, when holding the base body 4, the holding portion 11 naturally exposes the outer peripheral surface 4 c of the base body 4.

  As shown in FIG. 2, the moving unit 12 includes a linear actuator 32, a linear encoder 33 as a moving speed detecting means, and the like. The linear actuator 32 includes a rail attached to the vertical plate 20 with its longitudinal direction parallel to the vertical direction, and a slider that moves relative to the rail along the longitudinal direction of the rail, that is, the vertical direction. A support base 34 to be described later is attached to the slider.

  The linear actuator 32, that is, the moving unit 12 moves the coating head 37 up and down via the support base 34. That is, the linear actuator 32, that is, the moving unit 12 relatively moves the holding unit 11 and the support base 34, that is, the coating head 37 along the axis P. The linear encoder 33 detects the moving speed of the slider, that is, the coating head 37 described above, and outputs information corresponding to the moving speed to the control device 18.

  As shown in FIG. 2, the coating unit 13 includes a support base 34, a movement support unit 35, a movement fixing unit 36, a coating head 37, a heating unit 38, and a chuck cylinder 39.

  The support base 34 includes a base body 40 formed in a flat plate shape. The base body 40 is attached to the slider of the linear actuator 32. Both surfaces of the base body 40 of the support base 34 are arranged in parallel with the horizontal direction. That is, the surface of the base body 40, that is, the support base 34 is formed flat along a direction orthogonal to the axis P. The support base 34 supports the coating head 37 via a ball 41 described later. The support base 34 is disposed below the coating head 37.

The movement support part 35 includes a plurality of balls 41 as first rolling elements provided on the base body 40 of the support base 34 so as to be freely rollable. An application head 37 is disposed on the ball 41. That is, the ball 41 is disposed between the base main body 40 of the support base 34 and the coating head 37, and can roll with respect to both of them. The movement support part 35 supports the coating head 37 movably along the direction orthogonal to the axis P described above on the support base 34 by the balls 41 rolling on both sides.

  The movement fixing unit 36 includes a plurality of electromagnets 42 attached to the base body 40 of the support base 34. When a voltage is applied, the electromagnet 42 generates a magnetic force, attracts the coating head 37 to the base body 40 of the support base 34, and fixes the coating head 37 to the base body 40 of the support base 34. When the movement fixing unit 36 is not applied to the electromagnet 42, the movement fixing unit 36 is in a first state in which the application head 37 is movable with respect to the base body 40 of the support base 34. The movement fixing unit 36 is in a second state in which the application head 37 is fixed to the base body 40 of the support base 34 by being applied to the electromagnet 42. The movement fixing unit 36 can be switched between the first state and the second state depending on whether or not it is applied to the electromagnet 42.

  As shown in FIG. 2, the coating head 37 includes a head main body 43 and a lid body 44. The head main body 43 includes an annular bottom plate portion 45, an outer peripheral wall 46 erected from the entire outer periphery of the bottom plate portion 45, and an inner peripheral wall 47 erected from the entire inner edge of the bottom plate portion 45. Yes. The inner diameter of the bottom plate portion 45, that is, the head main body 43 is larger than the outer diameter of the base body 4. The height of the outer peripheral wall 46 from the bottom plate portion 45 is higher than the height of the inner peripheral wall 47 from the bottom plate portion 45. On the inner surface of the inner peripheral wall 47, an inclined surface 48 that is gradually inclined in a direction toward the inner side of the bottom plate portion 45 as it goes upward from the bottom plate portion 45 is formed.

  The lid body 44 includes an annular lid body 49 and a partition wall 50. The lid body 49 is formed so that the inner and outer diameters are substantially equal to the bottom plate portion 45 of the head body 43. The lid main body 49, that is, the lid body 44 is attached to the head main body 43 with the outer edge portion thereof overlapped with the outer peripheral wall 46 of the head main body 43. The lid 44 prevents the solvent of the paint of the head main body 43 from volatilizing and prevents foreign matters such as dust from entering the paint 7 in the head main body 43. The inner edge of the lid body 49 is spaced from the inner peripheral wall 47. For this reason, the upper end part of the inner peripheral surface of the coating head 37 is cut out over the entire circumference. That is, the coating head 37 is provided with an opening that communicates the inside and the outside at the upper end of the inner peripheral surface thereof.

  The partition wall 50 is formed in a cylindrical shape and is arranged coaxially with the lid body 44. The partition wall 50 is erected from the central portion between the inner edge and the outer edge of the lid body 49 toward the bottom plate portion 45. The height of the partition wall 50 from the lid body 49 is lower than the height of the outer peripheral wall 46 from the bottom plate portion 45. For this reason, the partition wall 50 is opposed to the bottom plate portion 45 of the head main body 43 with a gap. The partition wall 50 divides the space 51 in the coating head 37 surrounded by the head main body 43 and the lid main body 49 into two. The partition wall 50 interferes with bubbles generated in the paint 7 in the coating head 37 when supplied by the paint supply unit 15 and the bubbles move to the base 4 side and adhere to the base 4. To prevent.

  The coating head 37 described above accommodates the above-described paint 7 in the above-described space 51 surrounded between the head main body 43 and the lid body 44. The coating head 37 is supplied with the coating material 7 until the liquid level 7 a is positioned above the inner peripheral wall 47 by the coating material supply unit 15. A seal member 52 is attached to the inner surface of the inner peripheral wall 47 of the head main body 43 of the coating head 37, that is, the inner circumferential surface of the coating head 37 over the entire circumference. The seal member 52 is made of an elastically deformable synthetic resin such as rubber and is formed in an annular shape. The seal member 52 has a constant thickness in the circumferential direction. The seal member 52 is disposed coaxially with the application head 37. The inner diameter of the seal member 52 in a neutral state where the seal member 52 is not elastically deformed (indicated by a two-dot chain line in FIG. 2) is smaller than the outer diameter of the base 4.

For this reason, the seal member 52 abuts on the base 4 passed through the coating head 37 and is elastically deformed to a state where the base 4 can be passed (shown by a solid line in FIG. 2). When elastically deforming as described above, the seal member 52 presses the outer peripheral surface 4c of the base body 4 inward along the radial direction of the base body 4, and keeps the space between the outer peripheral surface 4c of the base body 4 watertight. That is, the seal member 52 prevents the paint 7 in the coating head 37 from leaking out of the coating head 37 from between the base member 4. Since the sealing member 52 itself is formed in an annular shape, when the coating head 37 is movable with respect to the support base 34, the force that presses the outer peripheral surface 4 c of the base member 4 of the sealing member 52 is increased. It becomes uniform in the circumferential direction.

  The coating head 37 passes the base body 4 through the head main body 43 so that the outer peripheral surface 4c of the base body 4 is immersed in the paint 7 of the head main body 43, and as shown by the parallel oblique lines in FIG. A release layer 6 as a coating film is formed.

  Further, as shown in FIG. 2, a liquid level detection sensor 53 as a measuring unit and a temperature sensor 54 as a temperature measurement unit are provided in the coating head 37. The liquid level detection sensor 53 is attached to the lid main body 49 of the lid body 44, and irradiates the liquid level 7a of the paint 7 accommodated in the coating head 37 with ultrasonic waves or the like, so that the level of the liquid level 7a is increased. Measure the thickness. The liquid level detection sensor 53 outputs information indicating the height of the liquid level 7 a of the paint 7 in the coating head 37 toward the control device 18.

  The temperature sensor 54 is attached to the inner surface of the head main body 43 and measures the temperature of the paint 7 accommodated in the coating head 37. The temperature sensor 54 outputs information indicating the temperature of the paint 7 in the application head 37 to the control device 18.

  As shown in FIG. 2, the heating unit 38 includes a bracket 55, a reflection member 56, and a halogen heater 57 as an infrared ray generation source. The bracket 55 includes an upright portion 58 erected from the base body 40 of the support base 34, and a horizontal extending portion 59 extending in the horizontal direction from the upper end of the upright portion 58 toward the upper side of the coating head 37. I have.

  The reflection member 56 is attached to the tip of the horizontal extension 59 of the bracket 55, and the planar shape is formed in an annular box shape. The reflection member 56, that is, the heating unit 38 is arranged coaxially with the base body 40 of the support base 34, that is, the coating head 37. An opening 60 that communicates the inside and outside of the reflecting member 56 is provided on the entire inner periphery of the reflecting member 56 facing the base 4 that passes through the inside of the coating head 37. All other parts of the reflecting member 56 are closed. Thus, the reflection member 56 is provided with at least the opening 60 facing the base 4. The reflection member 56 reflects the infrared rays radiated from the halogen heater 57 accommodated inside the reflection member 56 toward the substrate 4 as an object to be coated through the opening 60.

  The halogen heater 57 is formed in an annular shape and is accommodated in the reflection member 56. The halogen heater 57 is disposed coaxially with the base body 40 of the support base 34, the reflection member 56, and the like. The halogen heater 57 radiates infrared rays.

  The heating unit 38 described above passes through the coating head 37, heats the coating 7 immersed in the coating head 37 and applied to the outer peripheral surface 4 c of the substrate 4, and dries the coating 7. The formation of the release layer 6 is promoted.

The chuck cylinder 39 includes a cylinder body 61 and a pair of contact / separation rods 62. The cylinder body 61, that is, the chuck cylinder 39 is disposed below the support base 34 and is fixed to the support base 34. The pair of contact / separation rods 62 are each formed in a rod shape, and are arranged in parallel with a space therebetween. The pair of contact / separation rods 62 are arranged at positions where the base 4 and the holding member 23 that are passed through the coating head 37 are positioned between each other. The contact / separation rods 62 can be contacted / separated from each other. The chuck cylinder 39 sandwiches the holding member 23 between the pair of contact / separation rods 62 by bringing the pair of contact / separation rods 62 closer to each other.

  The coating unit 13 described above is gradually lowered by the moving unit 12 and passes the base 4 from the upper end 4a toward the lower end 4b. And the application | coating unit 13 forms the release layer 6 as a coating film in the outer peripheral surface 4c of this base | substrate 4 by immersing the outer peripheral surface 4c of the base | substrate 4 in order toward the lower end part 4b from the upper end part 4a. Further, since the coating head 37 of the coating unit 13 is provided so as to be movable along the direction orthogonal to the axis P by the movement support portion 35, it is always coaxial with the base 4 by the elastic restoring force of the seal member 52. Be placed. In addition, the shift | offset | difference of the axial center of the application | coating head 37 of the application | coating unit 13 and the base | substrate 4 can be made into about 0.1 mm to 0.2 mm.

  As shown in FIG. 1, the reference positioning mechanism 14 includes a rotary cylinder 63, a turning arm 64, and a master mandrel 65 as a reference positioning member. The rotary cylinder 63 includes a cylinder main body 66 and a rod provided to be rotatable with respect to the cylinder main body 66. The cylinder body 66 is attached to the vertical plate 20. The axis of the rod is parallel to the vertical direction.

  The swivel arm 64 is formed in a band plate shape with one end fixed to the rod of the rotary cylinder 63. The master mandrel 65 is formed in a cylindrical shape whose outer diameter is equal to the outer diameter of the base body 4. The master mandrel 65 is attached to the other end of the turning arm 64. The axis of the master mandrel 65 is parallel to the axis P of the base body 4, that is, the vertical direction.

  With the above-described configuration, the reference positioning mechanism 14 rotates the rod of the rotary cylinder 63 so that the master mandrel 65 is adjusted to the same position as the non-defective substrate 4 that is positioned by the holding unit 11 (in FIG. It is possible to move between a position where it is separated (retracted) from the coating head 37 (indicated by a dotted line). At the adjustment position, the master mandrel 65 is positioned at the same position as the substrate 4, so that it can enter the coating head 37. The reference positioning mechanism 14 passes the master mandrel 65 at the adjustment position through the coating head 37 in the first state described above, and the seal member 52 comes into contact (interference) with the master mandrel 65, so that the coating head 37. The coating head 37 is positioned at a reference position with respect to the support base 34. The reference position refers to the force by which the sealing member 52 presses the outer peripheral surface 4c of the base 4 passing through the coating head 37 in the circumferential direction, and the inner edge of the coating head 37 and the outer peripheral surface 4c of the base 4 And the position where the coating head 37 can form the release layer 6 having a uniform thickness in the circumferential direction.

  As shown in FIG. 1, the paint supply unit 15 includes a paint tank 67 as a storage container, a stirring motor 68, a liquid feed pump (not shown), a viscometer 69 as a viscosity measurement unit, and a supply pipe 70 ( 2). The paint tank 67 is installed on the lowermost horizontal plate 19 of the apparatus main body 10. The paint tank 67 stores the paint 7 described above. The stirring motor 68 is fixed to the paint tank 67, and an impeller is attached to an output shaft positioned in the paint tank 67. The agitation motor 68 agitates the paint 7 in the paint tank 67 to prevent unevenness in the viscosity of the paint 7.

  The liquid feed pump feeds the paint 7 in the paint tank 67 into the head main body 43 of the coating head 37 through the supply pipe 70. The viscometer 69 is provided in the paint tank 67 and can measure the viscosity of the paint 7 in the paint tank 67. The viscometer 69 outputs information indicating the viscosity of the paint 7 in the paint tank 67 to the control device 18. The supply pipe 70 connects the paint tank 67 and the head main body 43 of the application head 37.

  In the coating material supply unit 15, the liquid feeding pump sends the coating material 7 in the coating tank 67 into the head body 43 of the coating head 37, so that the liquid level 7 a exceeds the inner peripheral wall 47. The above-mentioned paint 7 is supplied.

  The cooling unit 16 includes a refrigerant circulation pipe 71 (shown in FIG. 2) as a refrigerant circulation unit and a cooling water circulation device 72 (shown in FIG. 1) as a heat exchanger. The pipe 71 is attached to the outer peripheral wall 46 of the coating head 37 over the entire outer peripheral surface of the outer peripheral wall 46 of the head main body 43 of the coating head 37. The pipe 71 circulates the water around the coating head 37 through water as a coolant. The pipe 71 cools or heats the paint in the coating head 37 by circulating water.

  The cooling water circulation device 72 is installed on the lowermost horizontal plate 19. The cooling water circulation device 72 temporarily accumulates the water in the pipe 71, sympathizes the heat of the water with external heat, and cools or heats the water to a desired temperature. Then, the cooling water circulation device 72 sends out the cooled or heated water into the pipe 71 again. Thus, the cooling water circulation device 72 keeps the temperature of the water as the refrigerant in the pipe 71 constant, thereby cooling or heating the paint 7 in the coating head 37 and keeping the temperature of the paint 7 constant. .

  As shown in FIG. 1, the blower unit 17 includes an inlet duct 73, a blower (not shown), an outlet duct 74, and a vacuum pump (not shown). The inlet duct 73 passes through the uppermost horizontal plate 19. The blower sends out air into the inlet duct 73. The outlet duct 74 passes through the vertical plate 20. The vacuum pump sucks air in the outlet duct. The blowing unit 17 described above sends air from a blower and sucks air with a vacuum pump, so that air flows along the arrow C in FIG. 1 and the solvent volatilized from the paint 7 in the coating head 37 is removed. Prevents diffusion.

  The control device 18 is a computer including a known RAM, ROM, CPU, and the like. As shown in FIG. 1, the control device 18 is attached to both the upper end portion of the vertical plate 20 and the uppermost horizontal plate 19. The control device 18 is connected to the holding unit 11, the moving unit 12, the coating unit 13, the reference positioning mechanism 14, the paint supply unit 15, the cooling unit 16, and the air blowing unit 17, and controls them. Then, it controls the entire coating film forming apparatus 1. That is, information from the linear encoder 33 of the moving unit 12 is input to the control device 18 and each part is controlled based on information from the linear encoder 33 and the like.

  A start switch 75 and various operation switches 76 are attached to the control device 18. The start switch 75 is used to switch the entire coating film forming apparatus 1 on and off. The operation switch 76 is used for operating the entire coating film forming apparatus 1. The control device 18 operates the entire coating film forming apparatus 1 by switching between the coating head positioning mode and the normal coating mode by the operation switch 76.

  The application head positioning mode is a mode that is operated after various setup operations such as cleaning the inside of the application head 37 and reassembling the application head 37 are performed. In the coating head positioning mode, first, as shown in FIG. 4A, when the coating head 37 is overlaid on the base body 40 of the support base 34, the control device 18 applies it to the electromagnet 42. An application head 37 is temporarily fixed to 34. That is, the above-described movement fixing unit 36 that fixes the coating head 37 to the support base 34 is set to the second state. Of course, the control device 18 keeps the support base 34 at the uppermost position in the moving unit 12 with the halogen heater 57 of the heating unit 38 turned off and the pair of contact / separation rods 62 of the chuck cylinder 39 separated from each other. Position it.

  Then, the control device 18 causes the reference positioning mechanism 14 to position the master mandrel 65 at the adjustment position. Then, as shown in FIG. 4B, the master mandrel 65 is positioned below the coating head 37. Then, the control device 18 gradually lowers the application head 37 to the moving unit 12. Then, the master mandrel 65 enters the coating head 37 and the seal member 52 comes into contact with the master mandrel 65. As described above, the control device 18 causes the moving unit 12 to pass the master mandrel 65 into the coating head 37. When the control device 18 determines that the seal member 52 is positioned in the center in the axial direction of the master mandrel 65 based on the information from the linear encoder, as shown in FIG. Stop.

  Thereafter, the control device 18 stops applying the voltage to the electromagnet 42 (turns off the electromagnet 42), and moves to the first state in which the coating head 37 is movable with respect to the support base 34 by the moving support portion 35. The fixed part 36 is switched. Then, the coating head 37 is positioned at a position where the force by which the sealing member 52 presses the master mandrel 65, that is, the outer peripheral surface 4 c of the base 4, becomes uniform in the circumferential direction of the base 4 by the elastic restoring force of the sealing member 52. Then, when a predetermined time has elapsed after the movement fixing unit 36 is once switched to the first state, the control device 18 switches the movement fixing unit 36 to the second state again and applies it again to the electromagnet 42 to apply the coating. The head 37 is fixed to the support base 34. And the control apparatus 18 raises the coating head 37 to the moving part 12, and positions this coating head 37 in the uppermost part.

  Then, the master mandrel 65 comes out of the coating head 37. The control device 18 positions the master mandrel 65 of the reference positioning mechanism 14 at the retracted position after the coating head 37 is positioned at the uppermost position. Thus, the control device 18 positions the coating head 37 at a reference position with respect to the support base 34 in the coating head positioning mode.

  In the normal coating mode, the coating head 37 is lowered through the base 4 in the coating head 37 to apply the coating 7 on the outer peripheral surface 4c of the base 4 in order from the upper end 4a to the lower end 4b. In this mode, the mold layer 6 is formed. In the normal application mode, first, the control device 18 reduces the rod 31 of the chuck cylinder 25 while the heating unit 38 is stopped, and places the application head 37 most on the moving unit 12 as shown in FIG. Position it above. At this time, the holding member 23 is passed through the coating head 37, the pair of contact / separation rods 62 of the chuck cylinder 39 are brought close to each other, and the holding member 23 is sandwiched between the pair of contact / separation rods 62. Further, the control device 18 causes the paint supply unit 15 to supply the paint 7 into the application head 37. At this time, since the seal member 52 keeps watertight between the holding member 23, the paint 7 does not leak from between the coating head 37 and the holding member 23.

  As shown in FIG. 5 (b), the base 4 in which the mandrel 22 is press-fitted and the holding member 23 is press-fitted at one end in the state where the coating head 37 is positioned at the uppermost position is the holding rod 24 and the rod of the chuck cylinder 25. 31. When the base 4 and the pair of holding members 23 are positioned between the holding rod 24 and the rod 31 of the chuck cylinder 25, the control device 18 extends the rod 31 of the chuck cylinder 25. Then, as shown in FIG. 5C, the holding member 23 and the mandrel 22 are sandwiched between the holding rod 24 and the rod 31 of the chuck cylinder 25 so that the holding portion 11 and the shaft 4 are in the vertical direction. Hold in parallel. Further, the control device 18 separates the pair of contacting / separating rods 62 of the chuck cylinder 39 from each other.

  Then, the control device 18 operates the heating unit 38 to gradually lower the coating head 37 to the moving unit 12. Then, the coating material 7 is applied to the outer peripheral surface 4c of the base body 4 in order from the upper end portion 4a to the lower end portion 4b, heated by the heating unit 38, and quickly dried, so that the coating material 7 does not leak. Then, the release layer 6 is formed.

  As illustrated in FIG. 5D, when the control device 18 determines that the coating head 37 is positioned at the lowest position based on the information from the linear encoder 33, the control device 18 stops the moving unit 12. Then, the control device 18 stops the heating unit 38 and reduces the rod 31 of the chuck cylinder 25. Then, as shown in FIG. 5 (d), after the base body 4 on which the release layer 6 is formed, the mandrel 22 that supports the base body 4, and the holding member 23 positioned above are removed, the control device 18. The pair of contact / separation rods 62 of the chuck cylinder 39 are brought close to each other, the remaining holding member 23 and the application head 37 are lifted, and the process returns to FIG. The substrate 4 is painted.

  Moreover, the control apparatus 18 operates the air blower and the vacuum pump of the air blowing unit 17 in the normal application mode. Furthermore, in the normal application mode, the control device 18 supplies the paint so that the liquid level in the application head 37 always maintains a constant height above the inner peripheral wall 47 based on information from the liquid level detection sensor 53. The coating material 7 is supplied to the application head 37 by the unit 15. Further, in the normal application mode, the control device 18 keeps the temperature of the paint 7 in the application head 37 constant by causing the cooling unit 16 to keep the temperature of water as a coolant constant.

  Further, in the normal application mode, the control device 18 detects the temperature of the paint 7 in the application head 37 detected by the temperature sensor 54, the viscosity of the paint 7 detected by the viscometer 69, and the application being detected by the linear encoder. The thickness of the release layer 6 as a coating film is estimated on the basis of the moving speed of the coating head 37 and the quality of the release layer 6 as a coating film is judged. Then, the control device 18 determines whether or not the thickness of the formed release layer 6, that is, the estimated thickness is within a predetermined range that is determined as a non-defective product. When the control device 18 determines that the product is defective, the control device 18 issues an alarm indicating that a defective product is formed on the alarm device connected to the control device 18 from the alarm device.

  According to the present embodiment, the movable support portion 35 allows the coating head 37 to move in the direction perpendicular to the axis P with respect to the support base 34, and the sealing member is elastically deformable around the entire inner edge of the coating head 37. 52 is provided, the coating head 37 is positioned at a position where the elastic restoring force of the seal member 52 becomes uniform in the circumferential direction by the elastic restoring force of the seal member 52. Therefore, the force by which the sealing member 52 presses the substrate 4 as the object to be coated can be uniform in the circumferential direction, and the pressing force of the sealing member 52 can be prevented from being concentrated on a part. Even if the base 4 is thin, the base 4 can be prevented from being deformed.

  Due to the elastic restoring force of the sealing member 52 described above, the distance between the coating head 37 and the substrate 4 is uniform in the circumferential direction, so that the release layer 6 having a constant thickness can be formed on the outer peripheral surface 4 c of the substrate 4. Therefore, the release layer 6 having a certain thickness can be easily formed on the outer periphery of the base 4 that is relatively thin and easily deformed.

  Since the controller 18 moves the coating head 37 and positions the coating head 37 with the master mandrel 65, the coating head 37 can be positioned at a position where the distance from the substrate 4 is uniform in the circumferential direction. In addition, since the coating head 37 is fixed to the support base 34 after the coating head 37 is positioned, it is possible to prevent the coating head 37 from being displaced. Therefore, a coating film having a certain thickness can be formed on the outer peripheral surface 4 c of the base 4.

  Since the movable fixing unit 36 includes the electromagnet 42 fixed to the support base 34, the coating head 37 can be securely fixed to the support base 34, and the coating head 37 can be prevented from being displaced from the position once positioned. At the same time, the coating head 37 can be reliably moved with respect to the support base 34.

Since the holding part 11 includes the mandrel 22 and the pair of holding members 23, the base body 4 can be reliably supported.

  The mandrel 22 includes a pair of disk members 26 that support both ends of the base 4 from the inside, and a shaft member 27 that has a smaller diameter than the disk members 26 that connect the disk members 26 to each other. Therefore, only the disk member 26 comes into contact with the base 4, and the contact area between the mandrel 22 and the base 4 can be suppressed. Therefore, when the base body 4 is attached to the mandrel 22, it is possible to prevent an excessive force from acting on the base body 4, and it is possible to prevent the base body 4 from being deformed even if the base body 4 is thin.

  Further, since only the both ends of the base 4 are supported by the disk member 26, the heat capacity when heated by the heating unit 38 or the like can be reduced, and the paint 7 can be dried instantaneously to prevent dripping of the paint 7. Can do.

  Since the outer diameter of the disk member 26 is larger than the inner diameter of the base body 4, the base body 4 can be reliably held by the disk member 26 and the paint can be prevented from entering the base body 4.

  Since the holding member 23 is provided with the seal members 29 at both ends, the seal member 29 seals between the inside of the base body 4 by the deformation thereof (maintains watertightness), so that the paint 7 inside the base body 4 can be obtained. Can be prevented from entering.

  Since the liquid level detection sensor 53 for detecting the liquid level 7a of the coating material 7 in the coating head 37 is provided, it is possible to keep the liquid level 7a of the coating material 7 in the coating head 37 constant and a highly accurate thickness coating film. As a result, the release layer 6 can be formed.

  Since the viscometer 69 for measuring the viscosity of the paint 7 is provided inside the paint tank 67 for storing the paint 7, the thickness of the release layer 6 as a coating film can be managed to be constant.

  Since it has the control device 18 that can measure the viscosity of the paint 7, the temperature of the paint 7, and the moving speed of the coating head 37, and calculates the thickness of the release layer 6 based on these measured values, The quality of the release layer 6 can be determined, and an alarm can be issued when there is a possibility of a nonstandard thickness, and the outflow of defective products can be suppressed.

  Since the pipe 71 for flowing water around the coating head 37 and the cooling water circulation device 72 for keeping the water at a constant temperature are provided, it is possible to prevent the temperature of the paint 7 from rising and the viscosity of the paint 7 from changing. A highly accurate release layer 6 can be formed.

  Since the heating unit 38 concentric with the base 4 is provided above the coating head 37, the coated paint 7 can be uniformly dried in the circumferential direction, and dripping of the paint 7 can be prevented and the coating film can be prevented. It is possible to prevent cracks and the like from occurring in the release layer 6.

  Since the heating unit 38 includes the halogen heater 57 that radiates infrared rays and the reflection member 56 that reflects the infrared rays toward the object to be coated, heating can be performed only during painting, and power consumption can be reduced. It becomes possible.

  Next, the inventors of the present invention confirmed the effect of the coating film forming apparatus 1 having the above-described configuration. The results are shown in Table 1 below.

  In Table 1, the product A of the present invention is a release layer formed by using the coating film forming apparatus 1 provided with the moving support portion 35 in which the misalignment between the axis of the substrate 4 and the coating head 37 is 0.1 mm. 6 is shown. The product B of the present invention shows the release layer 6 formed using the coating film forming apparatus 1 provided with the moving support portion 35 in which the deviation of the axis of the base 4 and the coating head 37 is 0.2 mm. The comparative example shows a release layer formed by using a conventional coating film forming apparatus that does not include the moving support portion 35 in which the misalignment between the axis of the substrate 4 and the coating head 37 is 0.5 mm.

  In the experiment shown in Table 1, PR910K (trade name) manufactured by Mitsui DuPont was used as the paint 7, the seal member 52 was made of nitrile rubber, its thickness was 1.0 mm, and the thickness of the object to be coated was 90 μm. A belt (made by Gunze) made of polyimide was used, and the moving speed of the coating head 37 was 2.0 mm / second.

  According to Table 1, it was clarified that the coating film can be formed without generating streaks by providing the movement support portion 35 as in the present invention.

  In the embodiment described above, the movement fixing portion 36 is provided. However, in the present invention, as shown in FIG. 6, the movement fixing portion 36 may not be provided. In FIG. 6, the same parts as those in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted. In the case where the movement fixing part 36 is not provided, as shown in FIG. 6, the support base 34 includes an outer edge convex part 77, and the movement support part 35 includes the outer edge convex part 77 and the bottom plate of the head main body 43 of the coating head 37. You may provide the ball | bowl 78 as a 2nd rolling element provided between two on the part 45. As shown in FIG. The outer edge convex portion 77 is erected from the outer edge of the base main body 40 of the support base 34, and the tip portion thereof is disposed above the bottom plate portion 45 of the head main body 43 of the coating head 37. The ball 78 is disposed between the distal end portion of the outer edge convex portion 77 and the bottom plate portion 45 of the head main body 43 of the coating head 37, and can roll with respect to both of them.

  In the example shown in FIG. 6, balls 41 as rolling elements are provided between the base body 40 of the support base 34 and the coating head 37, and between the outer edge convex portion 77 of the support base 34 and the coating head 37, respectively. 78 is provided, the coating head 37 can be reliably moved in the direction orthogonal to the axis P, and therefore the spacing between the coating head 37 and the substrate 4 can be made uniform in the circumferential direction, and coating can be performed. Since the head 37 can be prevented from moving along the axis P with respect to the support base 34, it is possible to prevent the time during which the head 37 is immersed in the paint 7 on the outer peripheral surface 4 c of the base 4 from varying along the axis P. Therefore, the release layer 6 having a constant thickness can be formed on the outer peripheral surface 4 c of the base 4.

  In the embodiment described above, the seal member 29 is provided at both ends of the holding member 23. However, in the present invention, as shown in FIG. 7, the seal member 29 is provided at one end of the holding member 23 and the other end. A tapered portion 79 that gradually narrows the holding member 23 may be provided. In FIG. 7, the same parts as those of the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the example shown in FIG. 7, the seal member 29 of one holding member 23 located above the pair of holding members 23 is inserted into the base body 4. That is, one holding member 23 is provided with a seal member 29 that keeps watertight between the holding member 23 and the base 4 at the end portion inserted into the base 4. In the example shown in FIG. 7, the tapered portion 79 of the other holding member 23 located below the pair of holding members 23 is inserted into the base body 4. That is, the other holding member 23 is provided with a taper portion 79 that gradually tapers toward the back of the base 4 at the end inserted into the base 4.

  In the example shown in FIG. 7, one holding member 23 includes the seal member 29, and the other holding member 23 includes the tapered portion 79, so that the infiltration of the paint 7 into the inside of the base body 4 can be prevented. In addition, since the base body 4 is easily pulled out from the other holding member 23 by the line contact by the taper portion 79, it is possible to prevent an excessive force from acting on the base body 4.

  In the embodiment described above, the viscometer 69 is disposed in the paint tank 67. However, in the present invention, the viscometer 69 may be disposed in the supply pipe 70. Further, although balls 41 and 78 are used as rolling elements, in the present invention, rollers may be used as rolling elements. In the embodiment shown in FIG. 2, as shown in FIG. 6, an outer edge convex portion 77 and a ball 78 as a second rolling element may be provided. Furthermore, in the embodiment described above, the release layer 6 is formed, but the coating film forming apparatus 1 of the present invention may form the primer layer 3.

  In the above-described embodiment, the case where the release layer 6 of the fixing belt 2 is formed is shown. However, the present invention is not limited to the fixing belt 2, and the coating film may be formed on various endless belts. Of course.

  In the above-described embodiment, the base 4 is fixed and the support base 34 of the coating unit 13 is moved. However, in the present invention, the support base 34 of the coating unit 13 may be fixed and the base 4 may be moved, or both the support base 34 and the base 4 of the coating unit 13 may be moved.

  The present invention is not limited to the above embodiment. That is, various modifications can be made without departing from the scope of the present invention. That is, the holding unit 11, the moving unit 12, the moving support unit 35, and the like are not limited to the configurations and arrangements described in the embodiments, and may have various configurations and arrangements.

(A) is a front view which shows the schematic structure of the coating-film formation apparatus concerning one Embodiment of this invention, (b) is the schematic structure of the coating-film formation apparatus shown by Fig.1 (a). FIG. It is sectional drawing which follows the II-II line | wire in Fig.1 (a). FIG. 2 is a longitudinal sectional view of a holding member and a mandrel of the coating film forming apparatus shown in FIG. 1. It is explanatory drawing explaining the motion of the coating head of the coating head positioning mode, etc. of the coating-film formation apparatus shown by FIG. It is explanatory drawing explaining the motion of the application | coating head of the normal application mode, etc. of the coating-film formation apparatus shown by FIG. It is sectional drawing which shows the modification of the application | coating unit shown by FIG. It is a longitudinal cross-sectional view which shows the modification of the holding member shown by FIG. FIG. 2 is a perspective view of a fixing belt obtained by forming a coating film with the coating film forming apparatus shown in FIG. 1. It is sectional drawing which follows the IX-IX line in FIG.

1 Coating film forming device 4 Substrate (object to be coated)
4c Outer peripheral surface 6 Release layer (coating film)
DESCRIPTION OF SYMBOLS 11 Holding part 12 Moving part 15 Paint supply part 18 Control apparatus (control part)
22 Mandrel 23 Holding member 24 Holding rod (Pressing part)
25 Chuck cylinder (pressing part)
26 Disk member 27 Shaft member 29 Seal member 33 Linear encoder (moving speed detecting means)
34 support base 35 movement support part 36 movement fixed part 37 coating head 38 heating part 40 base body 41 ball (first rolling element)
42 Electromagnet 52 Sealing member 53 Liquid level detection sensor (measuring means)
54 Temperature Sensor (Temperature Measurement Unit)
56 Reflective member 57 Halogen heater (Infrared source)
60 Opening 65 Master mandrel (reference positioning member)
67 Paint tank (container)
69 Viscometer (viscosity measuring part)
70 Supply pipe 71 Pipe (refrigerant circulation part)
72 Cooling water circulation device (heat exchanger)
77 Outer edge convex part 78 Ball (second rolling element)
P shaft core

Claims (6)

A holding unit for holding the object to be coated such that the axis of the cylindrical object to be coated is parallel to the vertical direction;
A coating head which is formed in a box-shaped ring for housing the coating to apply the coating material to the outer peripheral surface of the front Symbol object to be coated was passed through the inside before Symbol object to be coated,
An elastically deformable annular seal member attached over the entire circumference of the inner peripheral surface of the coating head so as to keep in contact with the object to be coated and watertight between the objects to be coated;
A support base that supports the coating head;
A moving unit that relatively moves the holding unit and the support base along the axis; and
A moving support unit that supports the coating head movably along a direction orthogonal to the axial center with respect to the support base ,
The inner peripheral surface of the coating head is cut out over the entire circumference, and
The holding portion includes a mandrel that is inserted into the object to be coated and supports both ends of the object to be coated from the inside, and a pair of inserts that are inserted at both ends of the object to be sandwiched between the mandrels. A holding member and a pressing portion that presses the pair of holding members in a direction in which the pair of holding members approach each other are provided.
A coating film forming apparatus characterized by that. Said mandrel, said pair of disk members to be inserted into the opposite ends of the object to be coated, the coating of claim 1, wherein a shaft member connected to the central portions of the disc-member, characterized in that it comprises a for Film forming device. The coating film forming apparatus according to claim 2 , wherein an outer diameter of the disk member is formed larger than an inner diameter of the object to be coated. One of the holding member of the pair of holding members is provided with a sealing member to maintain between該被coated article watertight said the end that is inserted into the object to be coated in, and,
The other holding member of the pair of holding members is provided with a tapered portion that gradually tapers toward the back of the object to be coated at the end inserted into the object to be coated. The coating-film formation apparatus as described in any one of Claim 1 thru | or 3 to do. The support base includes a base body disposed below the coating head, and an outer edge convex portion standing from the outer edge of the base body and having a tip portion disposed above the coating head,
The moving support portion is disposed between the base body and the coating head, and is capable of rolling with respect to both of them, and between the tip of the outer edge convex portion and the coating head. They are arranged in the coating film forming apparatus as claimed in any one of claims 1 to 4, characterized in that it comprises a a rollable second rolling element against both. A reference positioning member movably provided between an adjustment position that allows entry into the coating head and a retracted position retracted from the coating head;
A movable fixing unit capable of switching between a first state in which the coating head is movable relative to the support base and a second state in which the coating head is fixed to the support base;
And a control unit,
The reference positioning member is passed through the application head at the adjustment position so that the application head is positioned at a reference position relative to the support base by interfering with the seal member attached to the application head. Composed and
The control unit is configured to switch the movement fixing unit to the second state, a unit that positions the positioning member at the adjustment position, and the positioning member that is positioned at the adjustment position by the movement unit. means for passing within, claims 1 to, characterized in that the positioning member is provided with a means for switching the moving fixing portion to said first state in a state of being passed into the coating head The coating film forming apparatus according to any one of 4 .

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