JP2017074687A - Rubber roller regeneration method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber roller regeneration method in which increase in regeneration cost is suppressed and rubber hardness is properly reduced for regeneration.SOLUTION: The method includes the steps of supplying the surface of a rubber roller 11 with solvent S including plasticizer and applying pressing force C to the surface of the rubber roller 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for regenerating a rubber roller used in a printing machine, for example.

  For example, the printing press includes a paper feeding device, a printing device, and a paper discharge device. The paper supply device supplies a print medium, the print device performs printing on the print medium, and the paper discharge device discharges the printed print media in a superimposed manner. A printing apparatus of such a printing machine supplies ink by rotating a number of ink rollers, each roller of a dampening device, a plate cylinder, a blanket cylinder, and the like, and performs printing on a printing medium. Some of these many ink rollers, each roller of the dampening device, and the blanket cylinder are constituted by rubber rollers in which rubber is wound around the peripheral surface.

  This rubber roller uses synthetic rubber, for example, nitrile rubber (NBR), as the rubber to be wound. It reacts with ink when used for a certain period of time, and the plasticizer in the rubber solid is extracted, so that the rubber hardness is initially set. It rises above the hardness and the diameter of the roller is reduced. Then, it becomes difficult to supply an appropriate amount of ink, and it becomes difficult to form a uniform ink film thickness, resulting in a decrease in print quality. In this case, the rubber on the peripheral surface is replaced with a rubber roller that has been used for a certain period. However, the rewinding work of rubber in the rubber roller generates enormous parts costs and work costs.

  As what solves such a problem, there exist some which were described in the following patent documents 1-3, for example. The ink form roller described in Patent Document 1 forms a urethane rubber single layer on a roller core, and the rubber hardness of the urethane rubber single layer is 40 ° to 45 ° when the surface temperature of the single layer is 25 ° C. It is set. In the method for regenerating and repairing a rubber roll described in Patent Document 2, after the surface of the rubber roll is polished with a minimum cutting allowance, an unvulcanized new rubber is wound and vulcanized by a mold press. In the offset printing method described in Patent Document 3, the silicone rubber blanket removed from the printing roll is immersed in a liquid having miscibility with butyl carbitol, which is a solvent in the printing ink stored in the liquid storage container, for a predetermined time. Thus, butyl carbitol contained in the blanket is extracted into a liquid.

Japanese Patent Laid-Open No. 10-272765 JP 09-155427 A JP 09-254365 A

  However, it is difficult to form the rubber hardness of the urethane rubber single layer on the roller metal core to a specific hardness with respect to the temperature, as in the ink form roller of Patent Document 1 described above, and the manufacturing cost increases. End up. Further, when the new rubber is vulcanized and molded after the surface of the rubber roll is polished as in the method of regenerating and repairing a rubber roll in Patent Document 2, the manufacturing cost increases. Further, when the silicone rubber blanket removed from the printing roll is immersed in the liquid as in the offset printing method of Patent Document 3, the liquid acts on the back surface and the end surface that are not used on the blanket. The thickness may be non-uniform.

  The present invention solves the above-described problems, and an object of the present invention is to provide a rubber roller recycling method capable of properly reducing the hardness of rubber while suppressing an increase in recycling cost.

  The rubber roller recycling method of the present invention for achieving the above object comprises a step of supplying a solvent containing a plasticizer to the surface of the rubber roller, and a step of applying a pressing force to the surface of the rubber roller. It is a feature.

  Accordingly, when a solvent containing a plasticizer is supplied to the surface of the rubber roller and a pressing force is applied to the surface of the rubber roller, the plasticizer contained in the solvent enters the inside from the surface and expands when the rubber roller surface contracts due to this pressing. . As a result, the rubber hardness of the rubber roller is reduced, and the outer diameter is increased to return to a state close to the initial state. As a result, it is not necessary to perform an expensive regeneration process on the rubber roller, an increase in the regeneration cost can be suppressed, and the rubber can be reproduced with the hardness reduced appropriately.

  In the rubber roller regeneration method of the present invention, the solvent is supplied to the surface of the rubber roller in a state where a pressing force is applied to the surface of the rubber roller.

  Therefore, by supplying the solvent with the pressing force applied to the surface of the rubber roller, the plasticizer contained in the solvent can easily enter the inside when the surface of the rubber roller is contracted by the pressing.

  The rubber roller regeneration method of the present invention is characterized in that a pressing force is applied to the surface of the rubber roller whose surface is supplied with the solvent.

  Therefore, by applying a pressing force to the surface of the rubber roller to which the solvent is supplied, the plasticizer contained in the solvent can easily enter the inside when the surface of the rubber roller contracts due to the pressing.

  The rubber roller regeneration method of the present invention is characterized in that a pressing force is intermittently applied to the surface of the rubber roller.

  Therefore, by intermittently applying a pressing force to the surface of the rubber roller, the surface of the rubber roller is repeatedly contracted by the pressing, and an appropriate amount of the plasticizer contained in the solvent can enter the inside.

  The rubber roller regeneration method of the present invention is characterized in that a pressing force is applied to the surface of the rubber roller by the pressing roller by bringing the surface of the rubber roller into close contact with the surface of the pressing roller.

  Therefore, since the pressing roller and the rubber roller are brought into close contact with each other, a pressing force is applied to the surface of the rubber roller by the pressing roller. Therefore, a uniform pressing force can be applied in the axial direction of the rubber roller. The hardness can be reduced uniformly over the entire region in the axial direction.

  The rubber roller regeneration method of the present invention is characterized in that a pressing force is applied over the entire circumference of the surface of the rubber roller by rotating the rubber roller or the pressing roller.

  Accordingly, since the rubber roller or the pressing roller is rotated to apply the pressing force over the entire circumference of the rubber roller, a uniform pressing force can be applied to the circumferential direction of the rubber roller, and the entire circumferential direction of the rubber roller can be applied. The hardness can be reduced uniformly.

  The rubber roller regeneration method of the present invention is characterized in that the rubber roller and the pressing roller are reciprocally moved in the axial direction.

  Therefore, when the rubber roller and the pressing roller are reciprocally moved relative to each other in the axial direction, the solvent is uniformly supplied to the area in the axial direction of the rubber roller. Can be reduced uniformly.

  The rubber roller regeneration method of the present invention is characterized in that the glaze removing member is brought into contact with the surface of the rubber roller located downstream from the position where the pressing force is applied in the rotation direction of the rubber roller.

  Therefore, the glaze removed from the surface of the rubber roller by the solvent can be easily removed by bringing the glaze removing member into contact with the surface of the rubber roller.

  In the rubber roller recycling method of the present invention, the glaze removing member is reciprocated in the axial direction of the rubber roller.

  Therefore, when the glaze removing member is reciprocated in the axial direction of the rubber roller, the solvent is uniformly supplied to the area in the axial direction of the rubber roller. The glaze peeled off from the surface of the film can be removed.

  According to the rubber roller recycling method of the present invention, a step of supplying a solvent containing a plasticizer to the surface of the rubber roller and a step of applying a pressing force to the surface of the rubber roller are provided, thereby suppressing an increase in the recycling cost. The rubber can be regenerated with its hardness lowered appropriately.

FIG. 1 is a schematic view illustrating a rubber roller recycling method according to the first embodiment. FIG. 2 is a perspective view showing the rubber roller regeneration method of the first embodiment. FIG. 3 is a graph showing a reproduction result of the rubber roller of the first embodiment. FIG. 4 is a perspective view showing a rubber roller recycling method according to the second embodiment.

  Exemplary embodiments of a method for regenerating a rubber roller according to the present invention will be explained below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, and when there are two or more embodiments, what comprises combining each embodiment is also included.

[First Embodiment]
FIG. 1 is a schematic diagram illustrating a rubber roller regeneration method according to the first embodiment, and FIG. 2 is a perspective view illustrating a rubber roller regeneration method according to the first embodiment.

  The printing press includes a paper feeding device, a printing device, and a paper discharge device. The printing device includes an ink supply source as an ink supply device, an ink source roller, an ink rider roller, and a water application as a dampening device. It comprises a roller, a water reciprocating roller, a water rider roller, a water kneading roller, an ink delivery roller, an ink kneading roller, an ink reciprocating roller, an ink form roller, a plate cylinder, a blanket cylinder, and the like. In this case, the ink rider roller, the ink kneading roller, the ink form roller, the water application roller, the water rider roller, and the water kneading roller are rubber rollers, and synthetic rubber is provided on the outer peripheral surface of the metal (or carbon) roller body. For example, rubber made of nitrile rubber (NBR) is wound around.

  By the way, this rubber roller reacts with the ink when used for a certain period of time, and the plasticizer in the rubber solid is extracted by the plasticizer extraction component contained in the ink, thereby increasing the rubber hardness and reducing the diameter of the roller. Become. In the rubber roller regeneration method of the first embodiment, the rubber hardness is increased by use for a certain period, the diameter of the roller is reduced, and the rubber roller with the glaze attached to the surface is returned to a state close to the initial state.

  The rubber roller regeneration method according to the first embodiment includes a step of supplying a solvent containing a plasticizer to the surface of the rubber roller, and a step of applying a pressing force to the surface of the rubber roller.

  In the first embodiment, as shown in FIGS. 1 and 2, the rubber roller 11 is rotatably supported by each support shaft 12 provided at each end in the axial direction. The pressing roller 21 is disposed adjacent to the rubber roller 11 and is rotatably supported by each support shaft 22 provided at each end in the axial direction. The pressing roller 21 only needs to be capable of elastically deforming the rubber roller 11 when the rubber roller 11 is pressed, and the surface hardness is equal to or higher than the hardness of the rubber roller 11. It is desirable to be a roller.

  The removal plate 31 as the glaze removal member is provided with a removal surface 32 that contacts the surface of the rubber roller 11.

The solvent S is a solution containing a plasticizer and can be supplied to the surface of the rubber roller 11. The plasticizer is a substance that gives flexibility to the rubber layer disposed on the surface of the rubber roller 11. For example, this solvent S is applied to fatty acid esters. For example:
Dicarboxylic acid ester R1OOC- (CH2) n-COOR2
Here, R1 and R2 are each an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 to 8.
The dicarboxylic acid ester is a mixed solution of an ester solvent and propyl alcohol.
Ester solvent Glutaric acid dimethyl ester CH3OOC- (CH2) 3-COOCH3
n-propyl alcohol CH3CH2CH2OH
In addition, an ester solvent is effective as a role of reducing the hardness of the rubber and a role of recovering the roller diameter with respect to the rubber roller 11, and alcohol is effective as a role of peeling the glaze.

  Hereinafter, the rubber roller regeneration method of the first embodiment will be described in detail. First, a pressing force C is applied to the surface of the rubber roller 11 by the pressing roller 21 by bringing the surface of the rubber roller 11 and the surface of the pressing roller 21 into close contact with each other. Next, in this state, by rotating the rubber roller 11 or the pressing roller 21 at a predetermined speed, the rubber roller 11 and the pressing roller 21 that are in contact with each other are rotated together, and the entire surface of the rubber roller 11 is rotated by the pressing roller 21. A pressing force C is applied over the circumference. At this time, the rubber roller 11 rotates counterclockwise (arrow A) about the center O1 in FIG. 1, and the pressing roller 21 rotates clockwise (arrow) about the center O2 in FIG. Rotate to B).

  Then, the rubber roller 11 is rotated, and the solvent S containing the plasticizer is dropped onto the surface of the rubber roller 11 from above with the pressing force C applied to the entire circumference of the surface by the pressing roller 21. Then, since the rubber roller 11 rotates in the direction of arrow A and the pressing roller 21 rotates in the direction of arrow B, the solvent S accumulates at the contact position between the rubber roller 11 and the pressing roller 21. By spreading in the axial direction, the solvent S is applied to all surfaces of the rubber roller 11 in the axial direction. Further, the solvent S is applied to all surfaces in the circumferential direction of the rubber roller 11 by rotating the rubber roller 11 and the pressing roller 21 in contact with each other. The rubber roller 11 and the pressing roller 21 may be synchronously rotated or may be different speed (slip) rotation.

  At this time, the rubber roller 11 is not only applied with the solvent S but also given a pressing force C, so that the plasticizer easily enters the rubber roller 11. That is, since the rubber roller 11 is applied with the pressing force C only at the contact position of the pressing roller 21, the pressing force C is intermittently applied to the surface of the rubber roller 11. Therefore, the rubber roller 11 contracts due to the pressing force C by the pressing roller 21, and in particular, when the pressing force C is released, the plasticizer contained in the solvent S enters the inside from the surface and expands. Then, the rubber roller 11 returns to a state close to the initial state as the hardness of the rubber decreases and the outer diameter increases.

  Moreover, since the rubber roller 11 gives the pressing force C in a state where the solvent S is attached to the surface, the glaze attached to the surface is easily peeled off. Here, the removal surface 32 of the removal plate 31 is brought into contact with the surface of the rubber roller 11, and the removal plate 31 is reciprocated in the axial direction (arrow D) of the rubber roller 11. Then, the glaze raised on the surface of the rubber roller 11 is removed by the removal plate 31. In this case, it is desirable that the removal plate 31 is brought into contact with the surface of the rubber roller 11 after the solvent S is sufficiently applied to the surface of the rubber roller 11.

  FIG. 3 is a graph showing a reproduction result of the rubber roller of the first embodiment. The graph of FIG. 3 represents a change in rubber hardness after the rubber roller is regenerated. This rubber roller 11 has an initial rubber hardness of 30 in an unused rubber roller, and has been increased to a rubber hardness of 35 when used over a certain period of time. In FIG. 3, the one indicated by the alternate long and short dash line represents the rubber hardness of the rubber roller processed by the rubber roller regeneration method in which no pressing force is applied to the rubber roller, and the solid line represents the pressing force against the rubber roller. The rubber hardness of the rubber roller processed by the rubber roller regeneration method of the first embodiment is given. Here, the method for regenerating the rubber roller without applying the pressing force is a method in which the pressing force is not applied only by dropping the solvent S containing the plasticizer onto the rubber roller 11 over a predetermined time. However, the type of the solvent S, the processing time, and the like are the same as in the rubber roller regeneration method of the first embodiment. Further, the rubber hardness of the rubber roller is an average of the measured values at four different locations in the axial direction. The rubber hardness is a standard defined in Japanese Industrial Standard JIS K 6253.

  As can be seen from the graph of FIG. 3, the rubber roller processed by the rubber roller regeneration method that does not apply the pressing force represented by the alternate long and short dash line to the rubber roller having a rubber hardness of 35 before the regeneration is around the rubber hardness of 30 immediately after the regeneration. However, the rubber hardness increased with the lapse of time, and increased to near the rubber hardness 33 when 15 days passed. On the other hand, the rubber roller processed by the rubber roller regeneration method of the first embodiment that applies a pressing force indicated by a solid line to the rubber roller having a rubber hardness of 35 before the regeneration decreases to a rubber hardness of about 29 immediately after the regeneration, The rubber hardness increased with the passage of time, but when about 15 days passed, the rubber hardness was maintained at an increase to a rubber hardness of 30.3, which was close to the initial rubber hardness of 30. Thus, it can be seen that the rubber roller regeneration method of the first embodiment that applies the pressing force has a sufficiently high effect of reducing the hardness of the rubber as compared to the rubber roller regeneration method that does not apply the pressing force.

  As described above, the rubber roller regeneration method according to the first embodiment includes the step of supplying the solvent S containing the plasticizer to the surface of the rubber roller 11 and the step of applying a pressing force to the surface of the rubber roller 11. ing.

  Accordingly, when the solvent S containing the plasticizer is supplied to the surface of the rubber roller 11 and a pressing force C is applied to the surface of the rubber roller 11, the plasticizer contained in the solvent S is released from the surface when the surface of the rubber roller 11 is contracted by this pressing. It goes inside and expands. Then, the hardness of the rubber of the rubber roller 11 decreases, and the outer diameter increases to return to a state close to the initial state. As a result, it is not necessary to perform an expensive regeneration process on the rubber roller 11, an increase in the regeneration cost can be suppressed, and the rubber can be reproduced with the hardness reduced appropriately.

  The rubber roller 11 used for a certain period of time is hardened and shrinks in diameter, and glaze adheres to the surface and accumulates. Simply applying the solvent S containing a plasticizer to the surface of the rubber roller 11 temporarily reduces the hardness of the rubber, but immediately returns to the original hardness. Therefore, as in the first embodiment, when the pressing force C is applied in a state where the solvent S containing the plasticizer is applied to the surface of the rubber roller 11, the solution S easily enters the inside due to the sponge effect when the rubber roller 11 contracts. , The plasticizer tends to stay inside. Therefore, the rubber of the rubber roller 11 can be effectively reduced and reproduced.

  In the rubber roller regeneration method of the first embodiment, the solvent S is supplied to the surface of the rubber roller 11 with a pressing force C applied to the surface of the rubber roller 11. Therefore, by supplying the solvent S with the pressing force C applied to the surface of the rubber roller 11, the plasticizer contained in the solvent S can easily enter the inside when the surface of the rubber roller 11 contracts due to pressing.

  In the rubber roller regeneration method of the first embodiment, a pressing force C is applied to the surface of the rubber roller 11 to which the solvent S is supplied. Therefore, by applying a pressing force C to the surface of the rubber roller 11 supplied with the solvent S on the surface, the plasticizer contained in the solvent S can easily enter the inside when the surface of the rubber roller 11 contracts due to the pressing. Can do.

  In the rubber roller regeneration method of the first embodiment, the pressing force C is intermittently applied to the surface of the rubber roller 11. Accordingly, by intermittently applying the pressing force C to the surface of the rubber roller 11, the surface of the rubber roller 11 is repeatedly contracted by the pressing, and an appropriate amount of plasticizer contained in the solvent S is allowed to enter the inside. Can do.

  In the rubber roller regeneration method according to the first embodiment, the pressing roller 21 applies a pressing force C to the surface of the rubber roller 11 by bringing the surface of the rubber roller 11 and the surface of the pressing roller 21 into close contact. Accordingly, a uniform pressing force C can be applied to the axial direction of the rubber roller 11, and the surface of the rubber roller 11 is not uneven, and the hardness is uniform over the entire region in the axial direction of the rubber roller 11. Can be lowered.

  In the rubber roller regeneration method of the first embodiment, the pressing force C is applied over the entire circumference of the surface of the rubber roller 11 by rotating the rubber roller 11 or the pressing roller 21. Therefore, a uniform pressing force C can be applied in the circumferential direction of the rubber roller 11, and the hardness can be uniformly reduced over the entire region in the circumferential direction of the rubber roller 11.

  In the rubber roller regeneration method of the first embodiment, the removal plate 31 is brought into contact with the surface of the rubber roller located downstream from the position where the pressing force C is applied in the rotation direction of the rubber roller 11. Therefore, the glaze peeled off from the surface of the rubber roller 11 by the solvent S can be easily removed.

  In the rubber roller regeneration method of the first embodiment, the removal plate 31 is reciprocated in the axial direction of the rubber roller. Accordingly, when the removal plate 31 is reciprocated in the axial direction of the rubber roller 11, the solvent S is uniformly supplied to the axial region of the rubber roller 11, and all the axial regions of the rubber roller 11 are supplied. The glaze peeled off from the surface of the rubber roller 11 by the solvent S can be removed.

[Second Embodiment]
FIG. 4 is a perspective view showing a rubber roller recycling method according to the second embodiment. In addition, the same code | symbol is attached | subjected to the member which has the same function as embodiment mentioned above, and detailed description is abbreviate | omitted.

  The rubber roller regeneration method of the second embodiment includes a step of supplying a solvent containing a plasticizer to the surface of the rubber roller, and a step of applying a pressing force C to the surface of the rubber roller.

  Hereinafter, the rubber roller regeneration method according to the second embodiment will be described in detail. As shown in FIG. 4, first, the pressing roller 21 applies a pressing force C to the surface of the rubber roller 11 by bringing the surface of the rubber roller 11 and the surface of the pressing roller 21 into close contact with each other. Next, in this state, by rotating the rubber roller 11 or the pressing roller 21 at a predetermined speed, the rubber roller 11 and the pressing roller 21 that are in contact with each other are rotated together, and the entire surface of the rubber roller 11 is rotated by the pressing roller 21. A pressing force C is applied over the circumference. At this time, the rubber roller 11 rotates in the counterclockwise direction (arrow A) in FIG. 3, and the pressing roller 21 rotates in the clockwise direction (arrow B) in FIG.

  At this time, the rubber roller 11 is reciprocated in the axial direction (arrow E), and the removal surface 32 of the removal plate 31 is brought into contact with the surface of the rubber roller 11. That is, the rubber roller 11 is reciprocally moved relative to the pressing roller 21 and the removal plate 31 in the axial direction. Then, the rubber roller 11 rotates and swings, and the solvent S containing the plasticizer is dropped onto the surface of the rubber roller 11 from above while the pressing force C is applied to the entire circumference of the surface by the pressing roller 21. Then, since the rubber roller 11 rotates in the direction of arrow A and the pressing roller 21 rotates in the direction of arrow B, the solvent S accumulates at the contact position between the rubber roller 11 and the pressing roller 21, and the rubber roller 11 and the pressing roller 21 Since the roller 21 reciprocally moves in the axial direction, the solvent S easily spreads in the axial direction of the rubber roller 11, and the solvent S is applied to all surfaces in the axial direction of the rubber roller 11. Further, the solvent S is applied to all surfaces in the circumferential direction of the rubber roller 11 by rotating the rubber roller 11 and the pressing roller 21 in contact with each other.

  At this time, since the pressing force C is applied only to the contact position of the pressing roller 21, the pressing force C is intermittently applied to the surface of the rubber roller 11. Therefore, when the pressing force C by the pressing roller 21 is released, the plasticizer contained in the solvent S enters the rubber roller 11 from the surface and expands. Then, the rubber roller 11 returns to a state close to the initial state as the hardness of the rubber decreases and the outer diameter increases.

  Moreover, since the rubber roller 11 gives the pressing force C in a state where the solvent S is attached to the surface, the glaze attached to the surface is easily peeled off. Here, since the removal surface 32 of the removal plate 31 is in contact with the surface of the rubber roller 11 and the rubber roller 11 and the removal plate 31 are reciprocally moved in the axial direction, the rubber roller 11 and the removal plate 31 are The rubber roller 11 moves relative to each other in two intersecting directions, and the glaze that protrudes over the entire surface of the rubber roller 11 is uniformly removed by the removal plate 31.

  As described above, in the rubber roller regeneration method of the second embodiment, the solvent S is supplied to the surface of the rubber roller 11 with the pressing force C applied to the surface of the rubber roller 11, and the pressing roller 21 is pressed. By reciprocating the rubber roller 11 in the axial direction, the rubber roller 11 and the pressing roller 21 are reciprocally moved in the axial direction.

  Therefore, when the surface of the rubber roller 11 contracts due to the pressing of the pressing roller 21, the plasticizer contained in the solvent S can easily enter the inside. Further, by reciprocally moving the rubber roller 11 and the pressing roller 21 in the axial direction, the solvent S is uniformly supplied to the axial region of the rubber roller 11. The hardness can be uniformly reduced over all regions.

  The rubber roller regeneration method of the present invention includes a step of supplying a solvent S containing a plasticizer to the surface of the rubber roller 11 and a step of applying a pressing force C to the surface of the rubber roller 11. In the embodiment, after the rubber roller 11 and the pressing roller 21 are brought into close contact with each other and the pressing force C is applied, the rollers 11 and 21 are rotated, and the solvent S is dropped onto the surface of the rubber roller 11. is not. For example, the rubber roller 11 or the pressing roller 21 may be rotated and brought into close contact, and the solvent S may be dropped onto the surface of the rubber roller 11. Further, after the solvent S is dropped on the surface of the rubber roller 11 or the pressing roller 21, the rollers 11 and 21 may be rotated after the rubber roller 11 and the pressing roller 21 are brought into close contact with each other and the pressing force C is applied. This order may be any order, and it is sufficient that the pressing force C is finally applied to the surface of the rubber roller in a state where the solvent S is applied to the surface of the rubber roller 11.

  Further, in the above-described embodiment, the rubber roller 11, the pressing roller 21, and the removal plate 31 are each combined, but the plurality of rubber rollers 11 are pressed by the single pressing roller 21. Also good. Further, the outer diameter of the rubber roller 11 and the outer diameter of the pressing roller 21 do not have to be the same, and one of them may be a large diameter or a small diameter.

  In the above-described embodiment, the rotation directions of the rubber roller 11 and the pressing roller 21 are different directions, and the movement direction at the contact position is the same direction. However, the rotation directions of the rubber roller 11 and the pressing roller 21 are the same direction. The moving direction at the contact position may be different.

  In the above-described embodiment, the solvent S is supplied to the entire surface of the rubber roller 11 and the pressing force C is applied to the rubber roller 11. However, the rubber roller 11 is pressed with a short axial length. Alternatively, a solvent roller may be provided, the solvent S may be supplied to a part of the surface of the rubber roller 11, and a pressing force C may be applied to the rubber roller 11.

  In the above-described embodiment, the solvent S is dropped on the surface of the rubber roller 11 from above, but it may be supplied by spraying from the side or below.

  Moreover, in embodiment mentioned above, although the pressing force C gave the pressing force C to the surface of the rubber roller 11, it is not limited to this method, Another pressing member which has a pressing surface instead of a pressing roller. Thus, the pressing force C may be applied to the surface of the rubber roller 11. Alternatively, the rubber roller 11 may be rolled on the pressing plate to apply the pressing force C to the surface. Further, as for applying the pressing force C to the rubber roller 11, for example, the pressing force is applied to the rubber roller 11 by the discharge pressure of the solution, or the rubber roller 11 is immersed in the solution filled in the pressure vessel to increase the pressure inside. Or may be granted.

  In the second embodiment described above, the rubber roller 11 is reciprocated in the axial direction with respect to the pressing roller 21, but the pressing roller 21 may be reciprocated in the axial direction with respect to the rubber roller 11. .

11 Rubber roller 21 Pressing roller 31 Removal plate (glaze removing member)
S solvent

Claims (9)

Supplying a solvent containing a plasticizer to the surface of the rubber roller;
Applying a pressing force to the surface of the rubber roller;
A method for recycling a rubber roller, comprising:   2. The rubber roller regeneration method according to claim 1, wherein the solvent is supplied to the surface of the rubber roller in a state where a pressing force is applied to the surface of the rubber roller.   The method for regenerating a rubber roller according to claim 1, wherein a pressing force is applied to a surface of the rubber roller having a surface supplied with the solvent.   The method for regenerating a rubber roller according to any one of claims 1 to 3, wherein a pressing force is intermittently applied to the surface of the rubber roller.   5. The pressing force is applied to the surface of the rubber roller by the pressing roller by bringing the surface of the rubber roller and the surface of the pressing roller into close contact with each other. A method for recycling the rubber roller as described.   6. The rubber roller regeneration method according to claim 5, wherein a pressing force is applied over the entire circumference of the surface of the rubber roller by rotating the rubber roller or the pressing roller.   7. The rubber roller regeneration method according to claim 5, wherein the rubber roller and the pressing roller are reciprocally moved relative to each other in the axial direction.   8. The glaze removing member is brought into contact with the surface of the rubber roller located downstream from the position where the pressing force is applied in the rotation direction of the rubber roller. 9. How to recycle rubber rollers.   9. The rubber roller regeneration method according to claim 8, wherein the glaze removing member is reciprocated in the axial direction of the rubber roller.

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