JP2005208280A - Method for manufacturing office automation roller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an office automation roller which is low in cost and is excellent in the accuracy of a crown shape section. <P>SOLUTION: An unvulcanized cylindrical molding continuously extruded from an extruder is cut to a length corresponding to the product office automation roller and thereafter, a shaft body is fitted into a hollow part of the cylindrical molding, following which the cylindrical molding with the shaft body is rotated around its central axis and is vulcanized while the cylindrical molding with the shaft body is pressed at one or more points in its circumferential direction with a shaping member of a concave lens shape having a section passing the central axis of the cylindrical molding with the shaft body from the outer side in the radial direction in a vulcanizer or vulcanizing oven. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a manufacturing method of an OA roller that can be used as a charging roller, a developing roller, a static elimination roller, or the like for OA equipment, and more particularly to a method that can reduce the product cross-section to a crown shape.

  An OA roller such as a charging roller, a developing roller, or a static elimination roller used in an OA apparatus such as an electrophotographic apparatus such as a copying machine or a printer or an electrostatic recording apparatus has a vulcanized cylindrical body disposed around a cored bar. Configured. These OA rollers are attached so as to press the photosensitive drum by applying force to both ends of the core metal. If this OA roller has a straight circumferential surface in the axial direction, the axial end portion of the OA roller is attached. Since the tube is pressed more strongly than the central part and a uniform pressing force cannot be obtained in the axial direction, a cylindrical body having a cross-sectional crown shape in which the radial thickness of the cylindrical body is thicker at the central part than at the axial end part is used. .

  The following method is known as a method for manufacturing such an OA roller having a cross-sectional crown shape. The first is a method of vulcanization using a crown-shaped mold (see Patent Document 1). However, this method requires at least as many dies as the number of OA rollers to be vulcanized at the same time, and there is a problem that investment in the dies becomes enormous.

  The second method is a method of continuously extruding a cylindrical molded body with an extruder, vulcanizing a product cut into a predetermined length, and then polishing to finish a cross-sectional crown shape (Patent Document 2). reference.). However, since this method also takes time for polishing, the capital investment for many polishing machines becomes enormous, and the material to be discarded by polishing is wasted, so the production cost per roller is high. turn into.

  Similarly, the third method is to continuously extrude the cylindrical molded body with an extruder, cut to a predetermined length and vulcanize, but when extruding the cylindrical molded body, the rubber discharge amount is continuously increased. The portion corresponding to the axial end portion of the cylindrical body of the product roller has a small extrusion amount, and the portion corresponding to the central portion in the axial direction is pushed out by increasing the extrusion amount (Patent Document 3). reference.). This method does not require a mold and does not need to be polished after vulcanization, so it is possible to produce a roller at a low production cost. However, it is difficult to control the amount of extrusion so that a desired crown shape is obtained. There is a problem that a high crown accuracy cannot be obtained.

JP 2003-177600 A JP 58-184173 A JP 2002-355840 A

  The present invention has been made in view of such problems, and an object of the present invention is to provide a method for manufacturing an OA roller that is low in cost and excellent in accuracy of a crown-shaped cross section.

<1> is a method for manufacturing an OA roller in which a vulcanized cylindrical body is provided around a core metal.
After cutting the unvulcanized cylindrical molded body continuously extruded from the extruder into a length corresponding to the product OA roller, the shaft body is fitted into the hollow portion of the cylindrical molded body, and the cylinder with the shaft body is inserted. After forming the cylindrical molded body, in the vulcanizing can or vulcanizing oven, at least one circumferential direction of the cylindrical molded body with the shaft body from the outside in the radial direction, the center of the cylindrical molded body with the shaft body Manufacture of an OA roller that rotates a cylindrical molded body with a shaft around its central axis while vulcanizing while pressing a section passing through the axis with a concave lens-shaped molding member, and finishes the cylindrical body into a cross-sectional crown shape Is the method.
Here, the concave lens shape includes all the cross-sectional shapes whose thickness monotonously increases from the central portion in the width direction to the end portion in addition to the concave lens shape in the cross section. Similarly, the crown shape includes all cross-sectional shapes in which the radius monotonously decreases from the central portion in the width direction toward the end portion.
The OA roller includes both a sponge roller having cells inside due to foaming at the time of vulcanization and a solid roller without cells.

  <2> is a method for manufacturing an OA roller according to <1>, wherein a rigid roller having a concave lens shape in cross section provided rotatably around a central axis is used as the mold member, and the number thereof is three or less. .

  <3> In <1>, a cylindrical molded body with a shaft body is used as the mold member, using a plate material having a constant thickness in the length direction and a concave lens shape in the width direction. This is a method of manufacturing an OA roller that vulcanizes while rolling in the length direction on the concave surface of the plate material.

  <4> is any one of <1> to <3>, wherein the difference between the maximum value and the minimum value of the concave lens-shaped portion of the die-shaped member is the radius of the crown-shaped portion of the product OA roller. This is a method for manufacturing an OA roller that is larger than the difference between the maximum value and the minimum value.

  <5> is a method for manufacturing an OA roller according to any one of <1> to <4>, wherein the cylindrical molded body with a shaft body is vulcanized in pressurized hot water.

  According to the invention <1>, an unvulcanized cylindrical molded body is continuously extruded from an extruder, and a crown-shaped mold is simply formed by using a molded member having a concave lens shape in cross section. Furthermore, since the crown shape is formed by molding, the accuracy can be increased.

  According to the invention <2>, since the rigid roller having a concave lens shape provided so as to be rotatable around the central axis is used, crown-shaped molding can be easily realized, and the number of rigid rollers can be reduced to three. Since the number is less than or equal to the number, the investment of the molding member can be suppressed.

  According to the invention of <3>, since the plate material having a concave lens shape in cross section is used and the cylindrical molded body with a shaft is rolled on the concave surface of the plate material, the crown shape is easily realized. It is possible to reduce the cost per roller by continuously rolling a number of OA rollers on the plate.

  According to the invention of <4>, considering the shape return after molding, the difference between the maximum value and the minimum value of the concave lens-shaped portion of the molding member is determined by the crown-shaped portion of the product OA roller. Since it is larger than the difference between the maximum value and the minimum value of the radius, the accuracy of the crown shape of the product OA roller can be improved.

  According to the invention <5>, since the cylindrical molded body with a shaft body is vulcanized in pressurized hot water, a pressure exceeding the saturated vapor pressure is applied as compared with the case of using another heat medium such as steam. It can be added to the cylindrical molded body, whereby the foaming in the unvulcanized state can be controlled to form fine and uniform cells, and desired physical properties can be carried on the OA roller.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an OA roller formed by the manufacturing method of this embodiment. The OA roller 1 includes a cored bar 2 and a cylindrical body 3 arranged around the cored bar 2. The outer diameter of 3 is dc at the axial center, but gradually decreases toward the axial end and becomes de at the axial end, and the cylindrical body 3 has a so-called crown-shaped cross section. As a specific example of the OA roller 1, the diameter of the core metal 2 is 5 to 6 mm, the diameter dc at the axial central portion of the cylindrical body 3 is 8 to 9 mm, and the axial central portion of the cylindrical body 3 has a diameter. The difference (dc-de) between the end portion and the end portion is 0.1 to 0.2 mm, and the cylindrical body 3 has a width of 200 to 300 mm.

  2 and 3 are schematic views for explaining the outline of the manufacturing process for forming the OA roller 1. First, as shown in FIG. The cylindrical molded body 12 having a cross-sectional shape shown in FIG. 2 (b) is continuously extruded, and then the cylindrical molded body 12 in the product OA roller 1 is allowed for the shrinkage allowance. The cylindrical molded body 13 cut to a fixed length, which is shown in a side view in FIG. 3A, is formed.

Thereafter, the cored bar 2 serving as a shaft body is fitted into the hollow portion of the cylindrical molded body 13 to form the cylindrical molded body 10 with a shaft body shown in a side view in FIG. In the tubular molded body 10 with the body, the diameter dc _{1 at the} central portion in the axial direction and the diameter de ₁ at the end portions in the axial direction are the same. Next, the cylindrical molded body 10 with a shaft body is vulcanized while being molded in a vulcanizing can or vulcanizing oven to finish a cross-sectional crown shape, which is taken out from the vulcanizing can or vulcanizing oven, Processing such as stabilization of characteristics is performed to complete the formation of the OA roller 1.

Hereinafter, a method of molding the cylindrical body 3 in the vulcanization step will be described in detail. In the vulcanization process, the first embodiment is performed using a molding roller. FIGS. 4 and 5 are schematic views showing the principle, and FIG. 4 (a) shows a shaft body in the middle of molding. The front view which looked at the cylindrical molding 10 from the axial direction, FIG.4 (b) is sectional drawing corresponding to the bb arrow line in Fig.4 (a). In the figure, reference numerals 5 and 6 denote molding rollers each functioning as a molding member. In these molding rollers 5 and 6, the central axes Lr ₁ and Lr ₂ are the center of the cylindrical molded body 10 with a shaft body. It is arranged in parallel with the central axis Lc on a plane including the axis Lc, and forms a concave lens shape in a cross section passing through the central axes Lr ₁ and Lr ₂ .

In this case, taking into account return deformation after molding of the cylindrical body 3, the radius of curvature of the concave surface in the cross section passing through the central axes Lr ₁ and Lr _{2 is set} to the convex surface of the cylindrical body 3 in the OA roller 1 as a product. It is preferable to make it smaller than the curvature radius.

  Then, in this molding method, the cylindrical molded body 10 with a shaft body is pressed by the molding rollers 5 and 6 at one or more locations in the circumferential direction (three locations in the case of FIG. 4) from the outside in the radial direction. However, the cylindrical molded body 10 with a shaft body is rotated around its central axis and vulcanized to finish the cylindrical body 3 into a cross-sectional crown shape.

  In the method shown in FIG. 5, instead of using the molding roller 6 in FIG. 4, the shaft-equipped cylinder is used while pressing only with the two molding rollers 5 using the own weight F of the cylindrical molded body 10 with the shaft. The cylindrical molded body 10 is rotated around its central axis and vulcanized, and thus the cylindrical body 3 can be finished in a cross-sectional crown shape with only the two molding rollers 5.

  Next, a specific example of a method of molding the cylindrical body with shaft 10 using such a molding roller will be described. The first of this specific example is a molding method for vulcanizing the cylindrical molded body 10 with a shaft in a vulcanizing can, and the process will be described with reference to FIGS. FIG. 6A is a schematic front view showing a molding apparatus used in this method. The molding apparatus 30 is connected to the driving roller base 22 via the driving roller base 22 and the biasing means 27. The presser roller base 25 is composed of a plurality of drive molding rollers 5 that drive and mold the cylindrical molded body 10 with a shaft body in a row (for example, in the case of FIG. The presser roller base 25 is provided with a plurality of pressering pressing rollers 5 that press and press the cylindrical molded body 10 with a shaft body (for example, in the case of FIG. 11).

  Shaft end portions 5a projecting from both ends in the axial direction are respectively attached to the center portion in the radial direction of the driving mold roller 5, while the shaft end portions 5a of the driving mold roller 5 are connected to the drive roller base 22, respectively. Two driving roller mounting bars 23 to be supported are provided, and the driving type roller 5 has both shaft end portions 5a inserted into holes formed in the driving roller mounting bar 23, and is attached to the driving roller base 22. A motor 29 is attached to the drive roller base 22 so as to be rotatable, and drives the drive rollers 5 together via a power transmission device such as a chain (not shown).

  A shaft end portion 6a protruding at both ends in the axial direction is also attached to the center portion in the radial direction of the pressing mold roller 6, while the shaft end portions 6a of the pressing mold roller 6 are connected to the pressing roller base 25, respectively. Two presser roller mounting bars 26 to be supported are provided, and the pressing die 6 is inserted into a hole formed in the presser roller mounting bar 23 so that both shaft end portions 6a are inserted into the presser roller base 25. The pressing mold roller 6 is supported so as to be rotatable, and each of the two cylindrical moldings 10 with a shaft set between the two adjacent driving molding rollers 5 is molded with the two driving molds. The roller 5 is configured to be pressed against the roller 5, and therefore, is attached to each position corresponding to the middle of the adjacent drive mold rollers 5 by a number smaller than that of the drive mold rollers 5.

  Each of the driving mold roller 5 and the pressing mold roller 6 has a concave lens shape in a cross section passing through the central axis thereof, and the pressing roller table 25 is connected to the driving roller table via a biasing means 27. In the state, the mold apparatus 30 is configured such that the cylindrical molded body 10 with the shaft body is press-molded by two drive mold rollers 5 and one press mold roller 6 from three circumferential directions.

  In order to mold the tubular molded body 10 with the shaft body while vulcanizing using the molding apparatus 30 described above, the following process is performed. First, as shown in FIG. 6 (b), the molding apparatus 30 is fixed on the transfer carriage 21, and between the adjacent driving molding rollers 5, an unvulcanized cylindrical molded body with a shaft body is formed. 10 is set.

  Next, the pressing roller table 25 is placed on the driving roller table 22, and the pressing roller table 25 and the driving roller table 22 are connected via the urging means 27 as shown in FIG. At this time, since the molding apparatus 30 is configured as described above, the cylindrical molded body 10 with the shaft body is pressed by the driving molding rollers 5 and 6 from three locations in the circumferential direction.

  Then, the shaping | molding apparatus 30 in which the cylindrical molded object 10 with a shaft was set is transferred in a vulcanization can. Here, the transfer carriage 21 itself is configured to be movable on the floor surface FL, and includes a roller conveyor at the top, and horizontally moves the molding apparatus 30 mounted on the roller conveyor, This is configured so that it can be taken in or discharged, and as shown in FIG. 7 (a), the transfer carriage 21 is moved to the opening of the waiting vulcanizing can 31 with the lid open. Thereafter, the drive roller base 22 is moved on the transfer carriage 21 and transferred onto the fixed base 33 provided in the vulcanizing can 31. In addition, the fixed base 33 has a roller conveyor at the top thereof, and is configured so that the molding apparatus 30 can be easily taken in and discharged.

  Then, as shown in FIG. 7B, vulcanization is started after the lid 32 of the vulcanization can 31 is closed, and the motor 29 is driven to rotate simultaneously with or prior to the start of vulcanization. Then, the respective driving mold rollers 5 are rotated. In this manner, the cylindrical molded body 10 with the shaft body is rotated in the vulcanizing can 31 while being rotated by the driving mold roller 5 and simultaneously being pressed by the driving mold roller 5 and the pressing mold roller 6. A sulfur reaction can be performed to finish the vulcanized tubular body 3 into a crown shape.

  After the vulcanization of the cylindrical molded body 10 with the shaft body is completed, the lid 32 of the vulcanization can 31 is opened, the molding device 30 is taken out from the vulcanization can 31, and this is transferred to the transfer carriage 21 waiting outside. Therefore, the presser roller base 25 is removed from the drive roller base 22, and the vulcanized OA roller 1 is taken out to complete one cycle.

  In the above description, instead of pressing the cylindrical molded body 10 with the shaft body by the pressing mold roller 6, it is possible to press the cylindrical molded body 10 with the shaft body by using its own weight. It is only necessary to form a molding apparatus with only the roller base 22 and put this molding apparatus into the vulcanizing can 31.

  In addition, when vulcanizing the cylindrical molded body 10 with the shaft body in the vulcanizing can, it is preferable to use hot water as a heating medium, and high-pressure hot water suppresses foaming before vulcanization, and is uniform and fine. The OA roller 1 having a simple cell can be formed.

  The second of the specific examples of the method of molding the cylindrical body with shaft 10 using the molding roller is a molding method when vulcanizing the cylindrical body with shaft 10 in a vulcanizing oven, The process will be described. FIG. 8 is a schematic front view showing a molding apparatus used in this method. In the molding apparatus 40, driving molding rollers 5 for driving and molding the cylindrical molded body 10 with a shaft body are arranged in a line. Are provided (for example, 17 in the case of FIG. 8).

  Shaft end portions 5a projecting from both ends in the axial direction are respectively attached to the center portion in the radial direction of the drive type roller 5 and the shaft type portions 40a of the drive type roller 5 are supported by the type device 40. Two drive roller mounting bars 42 are provided, and the driving mold roller 5 is rotatable to the molding apparatus 40 by inserting both shaft end portions 5a into holes formed in the drive roller mounting bar 42. In addition, a motor 43 that collectively drives the drive rollers 5 via a power transmission device such as a chain (not shown) is attached to the mold forming device 40. In the figure, reference numeral 41 denotes a vulcanizing oven that forms a high-temperature space with an electric heater or the like.

  In order to vulcanize the cylindrical molded body 10 with the shaft body while molding using such a molding apparatus 40 and the vulcanizing oven 41, the following process is performed. This method is a continuous process, in which the motor 43 is continuously driven to rotate all the driving mold rollers 5, and in this state, first, the unvulcanized shaft-formed cylindrical molded body 10 is vulcanized in a vulcanizing oven. 41 is input to an input position E1 provided between the pair of driving mold rollers 5 located on the inlet side of 41. At this time, the cylindrical molded body 10 with the shaft body is rotationally driven by the driving mold roller 5 and is pressed by receiving a force from the driving mold roller 5 by the action of the weight of the cylindrical molded body 10 with the shaft body. .

  Then, the cylindrical molded body 10 with a shaft body is moved from the inlet side to the outlet side of the vulcanizing oven 41 by one pitch by a pitch feeding device (not shown) with the interval between the driving mold rollers 5 as one pitch. Sent. During this time, the cylindrical molded body 10 with the shaft body is continuously rotated and pressed by the drive molding roller 5, and while the cylindrical molded body 10 with the shaft body stays in the space in the vulcanizing oven 41. The vulcanization reaction is simultaneously performed by the heat of the vulcanization oven, and at the discharge position E2 located on the outlet side of the vulcanization oven 41, the cylindrical body 3 molded into a crown shape is formed. Continuously discharged.

  Thus, also in the second specific example of the method of molding the cylindrical molded body 10 with the shaft body using the molding roller, the cylindrical body 3 is formed into a crown shape by using the molding apparatus 40 and the vulcanizing oven 41. Can be finished.

  FIG. 9 is a schematic diagram for explaining the principle of the second embodiment of the method of molding the cylindrical molded body 10 with a shaft body into a cross-sectional crown shape in the vulcanization process. As shown in the figure, a plate-shaped plate material 8 having a certain thickness in the length direction X and a cross-sectional concave lens shape in the width direction Y is used, and the shaft-shaped cylindrical molded body 10 is formed on the concave surface 8a of the plate material 8. Is vulcanized while rolling in the length direction X.

  The first of the specific examples of the method for molding the cylindrical molded body 10 with a shaft body using such a molded plate material is the molding when the cylindrical molded body 10 with a shaft body is vulcanized in a vulcanizing can. The method will be described with reference to FIG. FIG. 10A is a schematic cross-sectional view showing a molding apparatus used in this method, FIG. 10B is a side view thereof, and the molding apparatus 50 is configured such that both end portions in the axial direction are supported by respective bearing members 54. A rotating shaft 53 that is supported, a molded body supporting member 56 that rotatably supports a plurality of cylindrical molded bodies 10 with shaft bodies arranged around the rotating shaft 53 at both axial ends thereof, and A link 52 that connects the rotating shaft 53 and each molded body support member 56 is provided, and a motor (not shown) that rotates the rotating shaft 53 is attached to the bearing member 54.

  On the other hand, on the inner peripheral surface of the vulcanizing can 51, a plate member 58 with a mold that is formed in a cylindrical shape, has a certain thickness in the circumferential direction, and has a concave lens-shaped cross section in the width direction is attached. The plate material 58 corresponds to the plate material 58 shown in FIG. 9 that is arranged so that the length direction X corresponds to the circumferential direction and the concave surface 8a faces the inner circumferential side.

  A leg portion 55 is attached to the bearing member 54 to support it, and the leg portion 55 has a caster 55a for taking in and out the molding device 50 into and out of the vulcanizing can 51, and is molded in the vulcanizing can 51. It is comprised so that the apparatus 50 can be fixed. In addition, the link 52 is configured by connecting two link members 52a and 52b by hinges, and each hinge connection part 52c is arranged facing outward in the axial direction. 10 is provided with a tension spring 57 that connects the hinge connection points 52c of the pair of left and right links 52 that support this, and a molded body support member supported by each link 52 by the action of the tension spring 57. 56 is displaced radially outward, and the cylindrical molded body 10 with the shaft body can be pressed against the concave surface 58a of the plate material 58 with the mold.

  In order to mold the cylindrical molded body 10 with the shaft body using such a molding apparatus 50, first, outside the vulcanizing can 51, a diameter reducing means (not shown) is used around the rotating shaft 53. The molded body support members 56 arranged radially are made to have a reduced diameter against the force of the tension spring 57, and in this state, the molded body support members 56 of the molding apparatus 50 are attached with shaft bodies. The cylindrical molded body 10 is set.

  Next, the molding apparatus 50 in which the cylindrical body with shaft 10 is set is transferred into the vulcanizing can 51, and the axial position at which the cylindrical body with shaft 10 opposes the concave surface 58 a of the plate member 58 with mold. Then, the molding apparatus 50 is fixed to the vulcanizing can 51, and then the diameter reducing force of the diameter reducing means (not shown) is released, the tension spring 57 is actuated to expand the diameter of the molded body support member 56, and the shaft body cylinder The shaped molded body 10 is pressed against the concave surface 58a of the plate member 58 with a mold.

  Next, the lid of the vulcanizing can 51 is closed and vulcanization is started. At the same time as the start of vulcanization or prior to the start of vulcanization, a motor (not shown) is driven to rotate the rotating shaft 53. In this way, in the course of vulcanization of the cylindrical molded body 10 with the shaft body, it is rotated while being pressed by the concave surface 58a of the plate material 58 with the mold. Then, after the vulcanization is completed, a reduced diameter device (not shown) is operated to reduce the diameter of the molded body support member 56 and take it out from the vulcanization can 51, where the vulcanized OA roller 1 is molded. Although it removes from the body support member 56 and completes one round process, the cylindrical body 3 can be finished by cross-sectional crown shape by these processes.

  The second of the specific examples of the method for molding the cylindrical body with shaft 10 using the plate material with a mold is a molding method for vulcanizing the cylindrical body with shaft 10 in a vulcanizing oven. The process will be described with reference to FIG. FIG. 11 is a cross-sectional view showing the cylindrical molded body 10 with a shaft in a cross section orthogonal to the axis thereof, in which 61 indicates a vulcanizing oven, 62 indicates a plate with a mold, The length direction is arranged to extend from the entrance side to the exit side of the vulcanizing oven, and the cross section in the width direction forms a concave lens shape, with the concave surface facing upward.

  In order to mold the cylindrical molded body 10 with a shaft body using such an apparatus, first, the unvulcanized cylindrical molded body 10 with a shaft body is placed on the mold plate member 62 at the entrance of the vulcanizing oven 61. It is placed at the closing position E3 located on the side. The shaft-shaped cylindrical molded body 10 placed at the charging position E3 is fed by a feeding device (not shown) while slowly rotating from the inlet side to the outlet side of the vulcanizing oven 61. The shaped molded body 10 is pressed against the concave surface of the mold plate by its own weight and is molded, and in the section where it stays in the vulcanizing oven, the vulcanization reaction is promoted, and the vulcanization reaction on the mold plate 62 is At the discharge position E4 located on the outlet side of the sulfur oven 61, the OA roller 1 having the cylindrical body 3 shaped in a cross-sectional crown shape is discharged. Thus, also in this specific example, the cylindrical body 3 can be finished in a cross-sectional crown shape, and can be continuously vulcanized.

It is sectional drawing which shows the OA roller formed by the manufacturing method of embodiment which concerns on this invention. It is a schematic diagram for demonstrating the outline | summary of the manufacturing process which forms an OA roller. It is a side view which shows a cylindrical molded object and a cylindrical molded object with a shaft. It is a schematic diagram which shows the principle of the typing method of 1st embodiment. It is another schematic diagram which shows the principle of the typing method of 1st embodiment. It is a schematic diagram which shows the 1st specific example of the shaping | molding method of 1st embodiment. It is a schematic diagram which shows the process following FIG. It is a schematic diagram which shows the 1st specific example of the shaping | molding method of 1st embodiment. It is a schematic diagram which shows the principle of the molding method of 2nd embodiment. It is a schematic diagram which shows the 1st specific example of the shaping | molding method of 2nd embodiment. It is a schematic diagram which shows the 2nd specific example of the shaping | molding method of 2nd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 OA roller 2 Core metal 3 Cylindrical body 5 Driving die roller 5a Shaft end portion of driving die roller 6 Pressing die roller 6a Shaft end portion of pressing die roller 8 Type plate material 8a Concave surface of die plate material 10 Axis Cylindrical molded body with body 12 Cylindrical molded body 13 Cylindrical molded body cut to a fixed length 18 Extruder 21 Transfer carriage 22 Drive roller base 23 Drive roller mounting bar 25 Press roller base 26 Press roller mounting bar 27 Energizing force Means 29 Motor 30 Molding device 31 Vulcanization can 32 Cover of vulcanization can 33 Fixing table 40 Molding device 41 Vulcanization oven 42 Drive roller mounting bar 43 Motor 50 Modeling device 51 Vulcanization can 52 Link 52a, 52b Link member 52c Hinge connection Part 53 Rotating shaft 54 Bearing member 55 Leg part 55a Caster 56 Molded body support member 57 Tension spring 58 Plated plate material 58a Concave surface of plated plate material 61 Vulcanization oven 62 Plated plate material

Claims (5)

In the manufacturing method of the OA roller in which the vulcanized cylindrical body is provided around the core metal,
After cutting the unvulcanized cylindrical molded body continuously extruded from the extruder into a length corresponding to the product OA roller, the shaft body is fitted into the hollow portion of the cylindrical molded body, and the cylinder with the shaft body is inserted. After forming the cylindrical molded body, in the vulcanizing can or vulcanizing oven, at least one circumferential direction of the cylindrical molded body with the shaft body from the outside in the radial direction, the center of the cylindrical molded body with the shaft body Manufacture of an OA roller that rotates a cylindrical molded body with a shaft around its central axis while vulcanizing while pressing a cross section passing through the axis with a concave lens-shaped molding member, and finishes the cylindrical body into a cross-sectional crown shape Method.   2. The method for manufacturing an OA roller according to claim 1, wherein a rigid roller having a concave lens shape provided so as to be rotatable around a central axis is used as the mold member, and the number thereof is three or less.   As the mold member, a plate material having a constant thickness in the length direction and a concave lens shape in the width direction is used, and a cylindrical molded body with a shaft body is formed in the length direction on the concave surface of the plate material. The method for producing an OA roller according to claim 1, wherein the vulcanization is carried out while rolling.   The difference between the maximum value and the minimum value of the thickness of the concave lens-shaped portion of the mold member is made larger than the difference between the maximum value and the minimum value of the radius of the crown-shaped portion of the product OA roller. The manufacturing method of the OA roller in any one of.   The manufacturing method of the OA roller in any one of Claims 1-4 which vulcanize | cure a cylindrical molded object with a shaft body in pressurized hot water.

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