JP5954444B1 - Coating apparatus and roll member manufacturing method - Google Patents

Abstract

Compared to a case where a discharge member that discharges a coating liquid moves from one chamfer to the other chamfer at a constant speed, application of the chamfered portion on the coating end side is suppressed while suppressing a decrease in productivity. A coating apparatus capable of suppressing the film thickness from being reduced and a method for manufacturing a roll member are obtained. As for the rotation speed of a rubber roll 100, when the discharge section 36 reaches the front, the second rotation speed is lower than the first rotation speed. For this reason, the film thickness of the coating film 16 of the other chamfered part 122 becomes thin by suppressing that the coating liquid 14 discharged to the portion on the ridge line 130 side of the conical surface 122A moves due to the centrifugal force. Be suppressed. [Selection] Figure 1

Description

  The present invention relates to a coating apparatus and a roll member manufacturing method.

  The outer diameter of the fixing roll described in Patent Document 1 is gradually reduced from a position separated by a predetermined length from the end in the axial direction to the end. A surface layer is formed on the outer peripheral surface of the fixing roll.

JP 2001-117406 A

  When the protective liquid is applied to the outer peripheral surface of the rubber roll (object to be coated), the protective liquid is discharged from the discharge portion to the outer peripheral surface of the rotating rubber roll, and the discharge portion is set at a predetermined speed in the axial direction of the rubber roll. It is supposed to be moved with.

  However, if the discharge part is moved at a constant speed, the thickness of the protective film (coating film) applied to the chamfered parts formed at both ends of the rubber roll may be reduced. This is thought to be because the protective liquid (coating liquid) applied to the chamfered portion on the application end side moves due to centrifugal force.

  The object of the present invention is to reduce the productivity as compared with the case where the discharge member that discharges the coating liquid moves from one side to the other chamfered portion at a constant speed, and then chamfers the coating end side. This is to suppress the thinning of the coating film of the part.

A coating apparatus according to claim 1 is a rotating member that rotates an object to be coated having a circular cross section with chamfered portions formed at both ends, and a discharge member that discharges a coating liquid onto the outer peripheral surface of the rotating object to be coated. A smoothing member that smoothes the coating liquid discharged onto the coated body, and the discharge member and the smoothing member individually relative to the coated body along the rotation axis direction of the coated body. The moving member to be moved, the rotating member, the discharge member, and the moving member are controlled, and the discharge member is moved from one portion of the coated body to the front portion of the other side of the coated body. The application body is rotated at a first rotation number, the application liquid is discharged from the discharge member at a first discharge amount, the discharge member is moved at a first speed, and the other chamfered portion is moved from the front portion to the other chamfered portion. to the portion of the chamfer ranges, the first rotational speed of the medium to be coated The coating member is discharged at a second discharge amount that is less than the first discharge amount, and the discharge member is moved at a second speed that is slower than the first speed. And a control unit to be moved.

The coating apparatus according to claim 2 is the coating apparatus according to claim 1, wherein the control unit controls the moving member while the discharge member discharges the coating liquid to the other chamfered portion. The smoothing member is separated from the object to be coated in the rotation axis direction .

The coating apparatus according to a third aspect is the coating apparatus according to the first aspect, wherein the control unit controls the moving member to move the ejection member moved to a portion of a chamfering range of the other chamfered portion. The smoothing member is separated from the object to be coated in the rotational axis direction, the discharge member is controlled to stop the discharge of the coating liquid from the stopped discharge member, and the smoothing member is The coating liquid is discharged from the discharge member while the coating body is rotated once in a state of being separated from the coating body.

In the roll member manufacturing method according to claim 4, the circular cross-sectioned coated body having chamfered portions formed at both ends is rotated at a first rotational speed, and the first discharge amount is applied to the rotating coated body. The coating liquid is discharged by a discharge member, the coating liquid discharged to the coated body is smoothed by a smoothing member, and the discharging member is moved from one part of the coated body to the other chamfered portion. A first application step of applying a coating liquid to the object to be applied by relatively moving the front part to the front part of the front, and a second rotation lower than the first rotational speed from the front part to the object to be applied. The discharge member discharges a coating liquid having a second discharge amount that is smaller than the first discharge amount onto the rotating coated body, and the discharge member is rotated at a second speed that is slower than the first speed. the move to the portion of the chamfering range of the other of the chamfer member to be coated Characterized in that it comprises a second coating step of coating a coating solution, a.

Method for producing a roll member according to claim 5 is a method of manufacturing a roll member according to claim 4, in the second coating step, when the discharge member for discharging the coating liquid to the other of said chamfered portion, wherein The smoothing member is separated from the coated body in the direction of the rotation axis of the coated body.

The roll member manufacturing method according to claim 6 is the roll member manufacturing method according to claim 4, wherein the movement of the discharge member that has moved to the chamfered range of the other chamfered portion is stopped, and the smoothing is performed. In the state where the member is separated from the coated body, the discharge of the coating liquid from the stopped ejection member is stopped, and the smoothing member is separated from the coated body in the rotation axis direction of the coated body, And a third application step of applying the coating liquid onto the coated body that discharges the coating liquid while the coated body rotates once from the discharge member.

  According to the coating apparatus of claim 1, compared to the case where the discharge member that discharges the coating liquid moves from one side to the other chamfered portion at a constant speed, the reduction in productivity is suppressed, and then the coating is performed. It can suppress that the film thickness of the coating film of the chamfering part of the end side becomes thin.

  According to the coating apparatus of claim 2, the film thickness of the coating film formed on the other chamfered portion compared to the case where the smoothing member smoothes the coating liquid discharged to the other chamfered portion by the discharge member. Can be suppressed.

  According to the coating apparatus of the third aspect, the terminal edge of the coating film of the coating liquid by the ejection member is less than the case where the coating liquid is not ejected from the ejection member after the movement of the ejection member is stopped at the other chamfered portion. Inclination with respect to the discharge direction can be suppressed.

  According to the roll member manufacturing method of claim 4, it is possible to suppress a decrease in productivity as compared with a case where the discharge member that discharges the coating liquid moves from one side to the other chamfered portion at a constant speed. Thus, it is possible to prevent the coating film on the chamfered portion on the coating end side from becoming thin.

  According to the roll member manufacturing method of claim 5, the coating film formed on the other chamfered portion as compared with the case where the smoothing member smoothes the coating liquid discharged to the other chamfered portion by the discharge member. It can suppress that the film thickness of this becomes thin.

  According to the roll member manufacturing method of claim 6, the terminal edge of the coating film is formed by the discharge member as compared with the case where the application liquid is not discharged from the discharge member after stopping the movement of the discharge member at the other chamfered portion. Inclination with respect to the discharge direction of the coating liquid can be suppressed.

It is the expansion front view which showed the rubber roll attached to the coating device and coating device which concern on embodiment of this invention. It is the expansion front view which showed the rubber roll attached to the coating device and coating device which concern on embodiment of this invention. It is the expansion front view which showed the rubber roll attached to the coating device and coating device which concern on embodiment of this invention. It is the expansion front view which showed the rubber roll attached to the coating device and coating device which concern on embodiment of this invention. It is the expansion front view which showed the rubber roll attached to the coating device and coating device which concern on embodiment of this invention. It is the expansion front view which showed the rubber roll attached to the coating device and coating device which concern on embodiment of this invention. It is the side view which showed the rubber roll attached to the coating device and coating device which concern on embodiment of this invention. It is the front view which showed the rubber roll attached to the coating device and coating device which concern on embodiment of this invention. (A) (B) It is the state figure which showed the state which apply | coated the coating liquid using the coating device which concerns on embodiment of this invention. (A) (B) It is the state figure which showed the state which apply | coated the coating liquid using the coating device which concerns on the comparison form with respect to embodiment of this invention.

  An example of the manufacturing method of the coating device which concerns on embodiment of this invention, and a roll member is demonstrated according to FIGS. In the drawing, an arrow H indicates the vertical direction of the apparatus (vertical direction), an arrow W indicates the apparatus width direction (horizontal direction), and an arrow D indicates the depth direction of the apparatus (horizontal direction).

(overall structure)
The coating apparatus 10 applies the coating liquid 14 to the outer peripheral surface of a rubber part 120 as an example of an object to be coated constituting the conductive rubber roll 100 (hereinafter referred to as “rubber roll”), and forms a coating film 16 on the outer peripheral surface of the rubber roll 100. It is a device to let you.

  As shown in FIG. 8, the rubber roll 100 is configured to include a metal shaft portion (shaft) 110 and a cylindrical rubber portion 120 through which the shaft portion 110 penetrates and mainly includes conductive rubber. ing.

  The coating device 10 is an example of a rotating device 20 as an example of a rotating member that rotates the rubber roll 100 (rubber part 120) and an example of a discharging member that discharges the coating liquid 14 to the outer peripheral surface 120A of the rubber part 120 of the rotating rubber roll 100. The discharge device 30 having the discharge portion 36 is provided. Furthermore, the coating apparatus 10 includes a blade 40 as an example of a smoothing member that smoothes the coating liquid 14 discharged to the outer peripheral surface 120A of the rubber part 120.

  Further, the coating apparatus 10 has a moving mechanism 48 as an example of a moving member that individually moves the discharge unit 36 and the blade 40 with respect to the rubber unit 120 along the rotation axis direction of the rubber roll 100 (hereinafter, “roll axis direction”). It has. The moving mechanism 48 includes a first moving mechanism 50 that moves the discharge unit 36 and a second moving mechanism 52 that moves the blade 40. Furthermore, the coating apparatus 10 includes a control unit 60 that controls each unit included in the coating apparatus 10.

[Rubber roll]
As described above, the rubber roll 100 to which the coating liquid 14 is applied by the coating apparatus 10 includes the shaft portion 110 and the rubber portion 120. In the present embodiment, as an example, the shaft diameter of the shaft portion 110 is 8 [mm], and the total length of the shaft portion 110 is 355 [mm]. Furthermore, the outer diameter of the rubber part 120 is 12 [mm], and the total length of the rubber part 120 is 320 [mm]. The volume resistivity of the conductive rubber constituting the rubber part 120 is 10 ⁷ [Ω · cm]. Furthermore, the rubber part 120 is formed from epichlorohydrin rubber and acrylonitrile-butadiene copolymer rubber as an example.

  Further, as shown in FIGS. 6 and 8, a chamfered chamfered portion 122 is formed at both ends of the rubber portion 120. The outer peripheral surface 120A of the rubber portion 120 includes a cylindrical surface 124 having the same outer diameter and a conical surface 122A formed by the chamfered portion 122. A ridge line 130 is formed at the boundary between the cylindrical surface 124 and the conical surface 122A.

  In this embodiment, as an example, the chamfer length (A dimension in FIG. 6) of the chamfered portion 122 is 1.5 [mm], and the chamfer angle (B angle in FIG. 6) is 30 [°]. ing.

  The rubber roll 100 of the present embodiment can be used for, for example, a charging roll, a transfer roll, a transport roll, and a developing roll of an electrophotographic image forming apparatus.

[Coating solution]
The coating solution 14 is a resin solution that is applied to the outer peripheral surface 120 </ b> A of the rubber part 120 of the rubber roll 100 to form the coating film 16. In the present embodiment, when the rubber roll 100 is used in an electrophotographic image forming apparatus, the coating film 16 is formed on the outer peripheral surface 120 </ b> A of the rubber portion 120 in order to ensure contamination resistance against external additives in the toner. Is done.

  As for the resin solution, for example, a conductive material may be mixed with a polymer material to form a composition. The polymer material is not particularly limited, but polyamide, polyurethane, polyvinylidene fluoride, tetrafluoroethylene copolymer, polyester, polyimide, silicone resin, acrylic resin, polyvinyl butyral, ethylene tetrafluoroethylene copolymer, melamine resin , Fluororubber, epoxy resin, polycarbonate, polyvinyl alcohol, cellulose, polyvinylidene chloride, polyvinyl chloride, polyethylene, ethylene vinyl acetate copolymer and the like. These polymer materials may be used alone or in combination of two or more.

  Examples of the conductive agent include an electronic conductive agent and an ionic conductive agent. An example of the electronic conductive agent is carbon black such as ketjen black or acetylene black. Examples of ionic conductive agents include perchlorates such as tetraethylammonium and lauryltrimethylammonium. These conductive agents may be used alone or in combination of two or more.

[Rotating device]
As shown in FIG. 8, the rotating device 20 supports both end portions of the shaft portion 110 of the rubber roll 100. The rotating device 20 rotates the rubber roll 100 in the circumferential direction of the rubber roll 100 (see arrow E in FIG. 8). The rotating device 20 can change the rotation speed of the rubber roll 100.

[Discharge device]
The discharge device 30 is stored in the storage section 32 that stores the coating liquid 14, the discharge section 36 that discharges the coating liquid 14 from the nozzle 34 toward the outer peripheral surface 120 </ b> A of the rubber section 120 of the rubber roll 100, and the storage section 32. And a supply unit 38 for supplying the coating solution 14 to the discharge unit 36.

  The supply unit 38 also includes a supply pipe 38A that connects the storage unit 32 and the discharge unit 36, and a pump 38B that sends the coating liquid 14 stored in the storage unit 32 to the discharge unit 36 through the supply pipe 38A. I have.

  In this configuration, the coating liquid 14 stored in the storage part 32 is sent to the discharge part 36 by the pump 38B, and the coating liquid 14 sent to the discharge part 36 is discharged from the nozzle 34 of the discharge part 36 to the outer peripheral surface of the rubber part 120. It is discharged toward 120A. Further, the discharge device 30 can change the discharge amount of the coating liquid 14.

  The discharge width of the coating liquid 14 is about 0.3 [mm].

〔blade〕
The blade 40 has a plate shape as shown in FIGS. 7 and 8, and is formed of a metal such as stainless steel (SUS) or a resin, for example. The blade 40 comes into contact with the coating solution 14 discharged onto the outer peripheral surface 120A of the rubber part 120 and smoothes the coating solution 14. By smoothing the coating liquid 14 with the blade 40 in this way, the film thickness (layer thickness) of the coating film 16 (see FIG. 8) formed by the coating liquid 14 falls within a predetermined range. It has become.

  As shown in FIGS. 2 and 5, the blade 14 is deformed along the conical surface 122 </ b> A of the chamfered portion 122.

[First moving mechanism]
The first moving mechanism 50 moves the discharge unit 36 along the roll axis direction (left and right direction in FIG. 8) (see FIG. 8). The first moving mechanism 50 can change the moving speed of the discharge unit 36.

  Specifically, the first moving mechanism 50 has a discharge portion support portion (not shown) that supports the discharge portion 36, and uses a mechanical element such as a ball screw or a belt to move these discharge portion support portions in the roll axis direction. It is comprised so that it may move along.

[Second movement mechanism]
The second moving mechanism 52 is configured to move the blade 40 along the roll axis direction (left-right direction in FIG. 8) (see FIG. 8). The second moving mechanism 52 can change the moving speed of the blade 40.

  Specifically, the second moving mechanism 52 has a blade support portion (not shown) that supports the blade 40, and uses a mechanical element such as a ball screw or a belt to move the blade support portion along the roll axis direction. Is configured to move.

  In this configuration, the first moving mechanism 50 and the second moving mechanism 52 cause the discharge unit 36 and the blade 40 to move along the roll axis direction with respect to the rubber roll 100 rotated by the rotating device 20. . And the discharge part 36 discharges the coating liquid 14 toward the outer peripheral surface 120A of the rubber part 120 to apply the coating liquid 14 in a spiral shape, and the blade 40 smoothes the coating liquid 14 ( (See FIG. 7). Thereby, the coating film 16 is formed on the outer peripheral surface 120 </ b> A of the rubber part 120 of the rubber roll 100.

(Control part)
The controller 60 controls the entire coating apparatus 10 including the rotation device 20, the discharge device 30, the first movement mechanism 50, and the second movement mechanism 52. The control unit 60 controls the rotating device 20 to adjust the number of rotations for rotating the rubber roll 100. The control unit 60 adjusts the discharge amount of the coating liquid 14 by controlling the pump 38B of the discharge device 30. The control unit 60 controls the moving direction and moving speed of the discharge unit 36 by controlling the first moving mechanism 50, and controls the moving direction and moving speed of the blade 40 by controlling the second moving mechanism 52. To be adjusted.

  In addition, control of each member by the control part 60 is demonstrated by the effect | action mentioned later.

(Function)
Next, the roll member 90 is formed by forming the coating film 16 having a thickness of 10 [μm] by discharging the coating liquid 14 onto the outer peripheral surface 120 </ b> A of the rubber portion 120 of the manufactured rubber roll 100. The manufacturing method of the roll member which manufactures (refer FIG.9 (B)) is demonstrated. In each figure, the left side in the roll axis direction is one (application start side), and the right side in each roll axis direction is the other (application end side).

[Rubber roll manufacturing process]
In the rubber roll manufacturing process, the rubber portion 120 mainly composed of conductive rubber is formed around the shaft portion 110 by extrusion molding, and both end portions in the roll axis direction of the rubber portion 120 are chamfered (FIGS. 6 and 8). reference). Thereby, the chamfered part 122 is formed in the both ends of the roll axial direction of the rubber part 120, respectively.

[Positioning process]
In the positioning step, the rubber roll 100 is attached to the rotating device 20 as shown in FIG. The nozzle 34 of the discharge portion 36 is positioned above the chamfered portion 122 formed on one side of the rubber roll 100, and the blade 40 is positioned so as to face the discharge portion 36 with the rubber roll 100 interposed therebetween. In this state, the plate surface of the blade 40 is in contact with the conical surface 122 </ b> A of the one chamfered portion 122.

[First application process]
In the first application process, the control unit 60 controls the rotating device 20 to rotate the rubber roll 100 at the first rotation speed. Further, the control unit 60 controls the discharge device 30 to discharge the coating liquid 14 from the nozzle 34 of the discharge unit 36 to the outer peripheral surface 120 </ b> A of the rubber unit 120 with the first discharge amount. Further, the blade 40 smoothes the coating liquid 14 discharged onto the outer peripheral surface 120 </ b> A of the rubber part 120, and the coating film 16 is formed on the outer peripheral surface 120 </ b> A of the rubber part 120. Further, the control unit 60 controls the first moving mechanism 50 and the second moving mechanism 52 to move the discharge unit 36 and the blade 40 to the front side, which will be described later, on the other side of the rubber roll 100 at a first speed.

  An example of parameters in the first application process is shown below.

Pump rotation speed (rotation speed of pump 38B): 150 [rpm]
Coating liquid discharge amount (first discharge amount): 1.0 g / 10 s
Movement speed (traverse speed: first speed): 43 [mm / s]
Rubber roll rotation speed (first rotation speed): 1000 [rpm]
[Second application process]
In the second application step, the control unit 60 controls the rotation device 20 to rotate the rubber roll 100 at a second rotation number lower than the first rotation number, and controls the discharge device 30 to control the discharge unit 36. The coating liquid 14 is discharged from the nozzle 34 with a second discharge amount smaller than the first discharge amount. Furthermore, the control unit 60 controls the first moving mechanism 50 and the second moving mechanism 52 to move the discharge unit 36 and the blade 40 to the other side of the rubber roll 100 at a second speed that is slower than the first speed.

  Specifically, when the discharge part 36 reaches the near side so that the coating liquid 14 is discharged to a part away from the ridgeline 130 of the rubber part 120 to 5.2 [mm] (J dimension in FIG. 1). The control unit 60 changes the parameters of each unit as described above (see FIG. 1). And the control part 60 moves the discharge part 36 to the upper side of the chamfering part 122 formed in the other of the rubber roll 100. FIG.

  An example of parameters in the second application process is shown below.

Pump rotation speed (rotation speed of pump 38B): 30 [rpm]
Coating liquid discharge amount (second discharge amount): 0.2 g / 10 s
Movement speed (traverse speed: second speed): 5 [mm / s]
Rubber roll rotation speed (second rotation speed): 200 [rpm]
Here, the front part is a part through which the moving discharge part 36 passes, and the coating liquid 14 discharged from the discharge part 36 moved (reached) to the front part is one side from the ridge line 130 as described above. It is discharged to a site separated by 4.6 [mm] to the side. In other words, the front portion is a position of the discharge portion 36 where a portion that is 4.6 mm away from the ridge line 130 and the center of the nozzle 34 face each other.

  The reason why the parameters of each part are changed when the discharge part 36 reaches the front part is that the coating liquid 14 discharged from the discharge part 36 to the conical surface 122A needs to be discharged according to the changed parameters. Yes (details will be described later). The reason why the coating liquid 14 from the discharge part 36 reaching the front part is discharged to a part away from the ridgeline 130 by 4.6 [mm] will be described below.

  First, the positional variation of the rubber part 120 with respect to the shaft part 110 in the roll axis direction, the positional variation of the ridge line 130 of the rubber part 120 in the roll axis direction, and the like are considered. Considering these variations, the position of the ridge line 130 with respect to the discharge unit 36 in the roll axis direction may be shifted by a maximum of 0.6 [mm] from the design value. Then, the margin is 4 mm. When 4 [mm] of the margin part is added to 0.6 [mm] of the positional variation, it becomes 4.6 [mm].

  For this reason, the coating liquid 14 from the discharge portion 36 that has reached the front portion is discharged to a site that is 4.6 [mm] away from the ridgeline 130 to one side.

  The reason why the margin portion is set to 4 [mm] is that if the margin portion is larger than 4 [mm], the effect of suppressing the decrease in productivity of the rubber roll 100 is diminished.

  From the above, it is assumed that the coating liquid 14 from the discharge portion 36 that has reached the front portion is discharged from the ridge line 130 to a portion of 4.6 mm from one side. However, by eliminating the margin part, the coating liquid 14 discharged from the discharge part 36 that has reached the front part may be discharged to a part separated by 0.6 [mm] from the ridge line 130 to one side. it can. In this way, the coating liquid 14 from the discharge unit 36 that has reached the front side may be discharged from the ridgeline 130 to one side between 0.6 [mm] and 4.6 [mm]. .

[Third application process]
In the third application step, the control unit 60 controls the first moving mechanism 50 to stop the movement of the discharge unit 36 that has moved to the upper side of the chamfered portion 122 formed on the other side, thereby controlling the discharge device 30. Thus, the discharge of the coating liquid 14 from the nozzle 34 is stopped.

  Specifically, when the coating liquid 14 discharged from the nozzle 34 reaches a portion 0.4 [mm] (K dimension in FIG. 2) away from the other ridge line 130 of the rubber roll 100 to the other side, the controller 60 Then, the movement of the discharge unit 36 is stopped, and the discharge of the coating liquid 14 from the nozzle 34 is stopped (see FIG. 2).

  Further, the control unit 60 controls the second moving mechanism 52 to move the blade 40, and stops the movement of the blade 40 when the blade 40 is separated from the rubber roll 100 in the roll axis direction (see FIG. 3).

  Further, the control unit 60 controls the discharge device 30 to discharge the coating liquid 14 from the nozzle 34.

  Specifically, the coating liquid 14 is discharged from the nozzle 34 and applied to the other chamfered portion 122 of the rubber portion 120 only during one rotation of the rubber roll 100 (see FIG. 4). Thereafter, the control unit 60 controls the rotating device 20 to stop the rotation number of the rubber roll 100. The period during which the rubber roll 100 rotates once is not less than 1 rotation and not more than 1.2 rotations in consideration of variations in the discharge of the coating liquid 14 from the nozzle 34.

―Comparison form―
Next, a coating apparatus and a roll member manufacturing method according to a comparative embodiment with respect to this embodiment will be described. About a comparison form, a different part from this embodiment is mainly demonstrated. In addition, about a comparison form, about the manufacturing process and positioning process of a rubber roll, it is the same as that of this embodiment.

[Coating process]
In the application process, the control unit controls the rotating device 20 to rotate the rubber roll 100 at the first rotation speed. Further, the control unit 60 controls the discharge device 30 so that the coating liquid 14 is discharged from the nozzle 34 of the discharge unit 36 to the outer peripheral surface 120A of the rubber unit 120 by the first discharge amount, and the outer peripheral surface 120A of the rubber unit 120 is discharged. Then, the coating liquid 14 discharged to the surface is smoothed by the blade 40 to form the coating film 16. Further, the control unit 60 controls the first moving mechanism 50 and the second moving mechanism 52 to move the discharge unit 36 and the blade 40 to the other side of the rubber roll 100 at a first speed.

  The control unit 60 moves the discharge unit 36 to the upper side of the chamfered portion 122 formed on the other side (the other side) of the rubber roll 100. When the discharge unit 36 discharges the coating liquid 14 toward the other chamfered part 122, the control unit 60 stops the discharge of the coating liquid 14 from the nozzle 34.

  Further, the control unit 60 moves the discharge unit 36 and the blade 40, moves the discharge unit 36 and the blade 40 away from the rubber unit 120 in the roll axis direction, and stops the movement.

  An example of parameters in the coating process is shown below.

Pump rotation speed (rotation speed of pump 38B): 150 [rpm]
Coating liquid discharge amount (first discharge amount): 1.0 g / 10 s
Movement speed (traverse speed: first speed): 43 [mm / s]
Rubber roll rotation speed (first rotation speed): 1000 [rpm]
(Summary)
In the method for manufacturing the roll member according to the comparative embodiment, the first rotation speed higher than the second rotation speed is maintained for the rotation speed of the rubber roll 100. For this reason, as shown in FIG. 10A, the coating liquid 14 discharged to the portion on the ridge line 130 side of the conical surface 122A moves to the cylindrical surface 124 by centrifugal force. Thereby, the film thickness of the coating film 16 in the portion on the ridge line 130 side in the conical surface 122A is reduced, and the film thickness of the coating film 16 in the portion on the ridge line 130 side in the cylindrical surface 124 is increased.

  Moreover, in the manufacturing method of the roll member which concerns on a comparison form, about the moving speed of the discharge part 36, the 1st speed made faster with respect to the 2nd speed is maintained. For this reason, as shown in FIG. 10B, the terminal edge 16D of the coating film 16 is viewed from the depth direction of the apparatus, and the discharge direction of the coating liquid 14 by the discharge unit 36 (the direction orthogonal to the roll axis direction). ).

  On the other hand, in the method for manufacturing a roll member according to the present embodiment, with respect to the rotation speed of the rubber roll 100, when the discharge unit 36 reaches the near side (see FIG. 1), a second rotation speed lower than the first rotation speed is obtained. Become. For this reason, as shown in FIG. 9A, the coating liquid 14 discharged to the portion on the ridge line 130 side of the conical surface 122A is prevented from moving by centrifugal force as compared with the comparative embodiment, and the other chamfering is performed. It is suppressed that the film thickness of the coating film 16 of the part 122 becomes thin.

  In the present embodiment, the stopped discharge unit 36 discharges the coating liquid 14 to the other chamfered portion 122. For this reason, as shown in FIG. 9B, the terminal edge 16C of the coating film 16 has a coating liquid 14 (see FIG. 4) formed by the discharge section 36 as compared with the comparative embodiment as viewed from the depth direction of the apparatus. Inclination with respect to the discharge direction (vertical direction) is suppressed.

  Further, in the present embodiment, while the blade 40 is separated from the rubber roll 100, the coating liquid 14 is discharged from the nozzle 34 and the coating liquid 14 is applied to the other chamfered portion 122 of the rubber portion 120 while the rubber roll 100 rotates once. Apply (see FIG. 4). For this reason, since the film thickness at the terminal edge 16C of the coating film 16 does not change due to the movement of the blade 40, it is possible to suppress the film thickness at the terminal edge 16C from becoming thinner as compared with the comparative example. The

  Moreover, in this embodiment, when the discharge part 36 reaches a near part, it changes from the parameter of a 1st application process to the parameter of a 2nd application process. Thereby, from the start of application to the end of application, a reduction in productivity is suppressed as compared with the case where each member operates with the parameters of the second application process.

  As described above, in the present embodiment, compared with the comparative embodiment, the film thickness of the coating film 16 of the chamfered portion 122 on the other side (coating end side) becomes thicker while suppressing the productivity from decreasing.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments can be taken within the scope of the present invention. This will be apparent to those skilled in the art. For example, in the third application step of the present embodiment, the movement of the discharge unit 36 is stopped and the blade 40 is separated from the rubber roll 100 in the roll axial direction, but the operation of separating the blade 40 from the rubber roll 100 is as follows. You may perform at a 2nd application | coating process.

  Moreover, in the said embodiment, although the rubber roll 100 did not move to a roll axial direction, the rubber roll 100, the discharge part 36, and the braid | blade 40 may be moved relatively by moving the rubber roll 100.

  Moreover, the 3rd application | coating process demonstrated by the said embodiment may not be.

DESCRIPTION OF SYMBOLS 10 Coating apparatus 14 Coating liquid 20 Rotating apparatus (an example of a rotating member)
36 Discharge part (an example of a discharge member)
40 blade (an example of a smoothing member)
48 Moving mechanism (an example of a moving member)
60 Control part 90 Roll member 120 Rubber part (an example of a to-be-coated body)
120A Outer peripheral surface 122 Chamfer

Claims (6)

A rotating member that rotates a cross-sectionally circular object to be chamfered with chamfered portions at both ends; and
A discharge member that discharges the coating liquid to the outer peripheral surface of the rotating object to be coated;
A smoothing member for smoothing the coating liquid discharged to the coated body;
A moving member that relatively moves the discharge member and the smoothing member individually along the rotation axis direction of the coated body with respect to the coated body;
The rotating member, the discharge member, and the moving member are controlled, and the discharge member is moved from one part of the object to be applied to the front part of the object in front of the other chamfered part. Rotating at the number of rotations, discharging the coating liquid at a first discharge amount from the discharge member, moving the discharge member at a first speed, from the front portion to the portion of the chamfering range of the other chamfered portion , The coated body is rotated at a second rotational speed lower than the first rotational speed, the coating liquid is ejected from the ejection member at a second ejection amount that is smaller than the first ejection amount, and the ejection member is moved to the first A controller that moves at a second speed slower than the first speed;
A coating apparatus comprising: The said control part controls the said moving member, and while the said discharge member discharges a coating liquid to the said other chamfering part , the said smoothing member is spaced apart from the said to-be-coated body in the said rotating shaft direction. 2. The coating apparatus according to 1. The control unit controls the moving member to stop the movement of the discharge member that has moved to a portion of the chamfering range of the other chamfered portion, and moves the smoothing member from the coated body in the rotation axis direction. The discharging member is controlled to stop the discharging of the coating liquid from the stopped discharging member, and the smoothing member is separated from the coated body, and the coated body is moved from the discharging member. The coating apparatus according to claim 1, wherein the coating liquid is discharged during one rotation. An object to be coated having a circular cross section with chamfered portions formed at both ends is rotated at a first rotational speed, and a first discharge amount of the coating liquid is discharged to the rotating object by a discharge member, and the object to be coated is rotated. The coating liquid discharged to the coated body is smoothed by a smoothing member, and the discharging member is moved relatively at a first speed from one part of the coated body to the front part in front of the other chamfered part. A first application step of applying a coating liquid to the substrate,
The object to be coated is rotated from the front portion at a second rotation speed lower than the first rotation speed, and a coating liquid having a second discharge amount smaller than the first discharge amount is discharged onto the rotating object to be coated. Discharging, moving the discharge member at a second speed slower than the first speed to a part of the chamfering range of the other chamfered portion, and applying a coating liquid to the coated body; and
The manufacturing method of a roll member provided with. 5. The second application step, wherein when the discharging member discharges the coating liquid to the other chamfered portion, the smoothing member is separated from the coated body in the rotation axis direction of the coated body. Method for manufacturing a roll member. Stopping the movement of the discharge member that has moved to the chamfered range of the other chamfered portion, separating the smoothing member from the coated body, and stopping the discharge of the coating liquid from the stopped discharge member; In the state where the smoothing member is separated from the coated body in the rotation axis direction of the coated body, the coating liquid is applied to the coated body that discharges the coating liquid while the coated body rotates once from the discharge member. A third application step of applying
The manufacturing method of the roll member of Claim 4 provided with these.