Rubber roll and rubber coating method thereof

Abstract

The application relates to a rubber roller and a rubber coating method thereof, the rubber coating method comprising the following steps: performing surface pretreatment on a roller shaft; preparing a first coating rubber and a second coating rubber, the vulcanization fluidity of the first coating rubber being greater than that of the second coating rubber under the same vulcanization condition; coating the surface of a roller body with the first coating rubber and coating at least part of the surface of a shaft head, so as to form a first rubber layer; coating the surface of the shaft head with the second coating rubber, so as to form a second rubber layer which is spaced from the first rubber layer; sending the rubber roller coated with the first rubber layer and the second rubber layer into a vulcanization device for vulcanization; and machining the rubber roller after vulcanization and forming and cutting off the first rubber layer and the second rubber layer on the surface of the shaft head. The scheme simplifies the machining process, reduces the operation difficulty, greatly improves the production efficiency, is suitable for rubber roller coating of different diameters, has good universality, and can save tooling cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber roller, in particular to a rubber roller and a rubber coating method thereof. BACKGROUND

[0002] The rubber roller is a stick-shaped product made of metal or other materials as the core and coated with rubber after vulcanization. The rubber roller is widely used in various industries. At present, the manufacturing method of the rubber roller mainly includes rubber coating, vulcanization and machining processes. In the early stage of the vulcanization process, the coated rubber has good fluidity, which easily causes the rubber to flow down from the end during vulcanization, thereby causing the rubber surface to be unable to be shaped, water vapor erosion, delamination and other adverse conditions, which may increase the difficulty of subsequent processing or even be scrapped.

[0003] In view of the above problems, a common solution is to install a blocking tool at the end of the roller shaft to prevent the rubber from flowing down from the end during vulcanization. At present, the blocking tool generally adopts a wooden or iron blocking plate. During installation, a corresponding wooden ring or iron ring is cut according to the roller diameter, and then a special fixing tool is selected to fix it on the roller core, and a corresponding size of the jack is used to block the wooden ring or iron ring, so as to achieve the blocking effect of the rubber coating end face.

[0004] However, using the blocking plate as the blocking tool still has the following problems during rubber coating: due to the difference in the diameter of the rubber roller, most of the tools used during processing need to be temporarily specially designed, and the process of designing the tool, installing the tool and disassembling the tool requires a lot of time and repeated measurement. In addition, some specially designed tools need to be purchased separately. The whole process is long in cycle and complicated in operation, and the specially designed tools cannot be reused and have a high cost. SUMMARY

[0005] In order to solve the problems in the prior art, the present application provides a rubber coating method of a rubber roller, which solves the problem of long production cycle, complicated operation and high tool cost caused by the need for temporary special tooling during rubber coating.

[0006] In one aspect, the present application provides a rubber coating method of a rubber roller, which comprises:

[0007] The roller shaft is subjected to surface pretreatment, and the roller shaft comprises a roller body and shaft heads arranged at both ends of the roller body;

[0008] The first coating rubber and the second coating rubber are provided, wherein the hardness of the second coating rubber is greater than that of the first coating rubber, so that the vulcanization fluidity of the first coating rubber is greater than that of the second coating rubber under the same vulcanization condition;

[0009] coating the surface of the shaft head with the second coating compound to form a second rubber layer on the surface of the area of the shaft head away from the roller body, and the second rubber layer is spaced apart from the first rubber layer to form an annular groove between the first rubber layer and the second rubber layer;

[0010] coating the surface of the shaft head with the second coating compound to form a second rubber layer on the surface of the area of the shaft head away from the roller body, and the second rubber layer is spaced apart from the first rubber layer to form an annular groove between the first rubber layer and the second rubber layer;

[0011] coating the surface of the shaft head with the second coating compound to form a second rubber layer on the surface of the area of the shaft head away from the roller body, and the second rubber layer is spaced apart from the first rubber layer to form an annular groove between the first rubber layer and the second rubber layer.

[0012] coating the surface of the shaft head with the second coating compound to form a second rubber layer on the surface of the area of the shaft head away from the roller body, and the second rubber layer is spaced apart from the first rubber layer to form an annular groove between the first rubber layer and the second rubber layer.

[0013] In one embodiment, the hardness of the first coating compound is 35-90 P&J, and the hardness of the second coating compound is 0-1 P&J.

[0014] In one embodiment, the rubber coating method further comprises cutting the end face of the first rubber layer to form a first slope surface, the first slope surface is a tapered surface, and the side of the first slope surface away from the shaft head is inclined towards the roller body.

[0015] In one embodiment, the projection of the first slope surface on the roller shaft is located on the shaft head.

[0016] In one embodiment, after the first rubber layer is formed, the first rubber layer is wrapped and shaped by using a first wrapping belt.

[0017] In one embodiment, the rubber coating method further comprises cutting the end face of the second rubber layer towards the roller body to form a second slope surface, the second slope surface is a tapered surface, and the side of the second slope surface away from the shaft head is inclined away from the roller body.

[0018] In one embodiment, after the second rubber layer is formed, the second rubber layer is wrapped and shaped by using a second wrapping belt.

[0019] In one embodiment, the length of the second rubber layer is at least half the length of the shaft head.

[0020] In one embodiment, the surface pretreatment of the roller shaft comprises:

[0021] using a cleaning agent to clean and remove dirt such as oil on the surface of the roller body and the shaft head; and / or

[0022] carrying out turning processing on the roller body and the shaft head to remove the oxide layers on surfaces of the roller body and the shaft head; and / or

[0023] carrying out sand blasting treatment on the surface of the roller body.

[0024] In one of the embodiments, the encapsulation method further comprises,

[0025] carrying out water-stopping platform turning processing on a part where the shaft head meets the roller body; and / or

[0026] carrying out water-stopping groove turning processing on an end of the roller body.

[0027] In another aspect, the application also provides a rubber roller made by using the encapsulation method of any of the above embodiments.

[0028] Advantages: In this scheme, the second encapsulation rubber material with a greater hardness than the first encapsulation rubber material is encapsulated on the shaft head during encapsulation to form a second rubber layer on the shaft head, so that the second rubber layer can form a natural blocking tool on the shaft head. When the first rubber layer is converted into a fluid state at the initial vulcanization stage and flows to the end of the roller shaft, the second rubber layer can block the flowing rubber material, avoiding the adverse conditions such as the inability to shape the rubber surface, moisture erosion, and delamination caused by the flow of the first rubber layer from the end. Moreover, this method can effectively solve the problem of difficult shaping caused by the flow of rubber material at the end of the roller body during encapsulation, without increasing additional process steps. Compared with the existing special-purpose structural tooling, this method not only saves the time for designing, installing, and disassembling the tooling, simplifies the processing flow, and reduces the operation difficulty, greatly improving the production efficiency, but also is applicable to the encapsulation of rubber rollers with different diameters, has good versatility, and can save tooling costs.

[0029] In addition, since the existing blocking tooling usually needs to be tightly pressed against the end surface of the rubber layer, the rubber material will be completely blocked by the blocking tooling when it flows to both ends, resulting in the inability to completely release the internal stress of the rubber material, and thus the rubber roller is prone to internal cracking. In this embodiment, the annular groove is arranged between the first rubber layer and the second rubber layer, so that the rubber material can flow into the annular groove when it flows. In this way, while the rubber material is blocked by the second rubber layer, the resistance of the second rubber layer to the rubber material is reduced through the transition of the annular groove, so that the rubber material can release the internal stress and avoid the problem of internal cracking of the rubber roller, and the quality of the rubber roller is better. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A flowchart of a rubber roller encapsulation method provided by one of the embodiments;

[0031] Figure 2 A structural schematic diagram of a roller shaft in a rubber roller encapsulation method provided by one of the embodiments;

[0032] Figure 3A sectional view of a roll shaft with a water stop platform and a water stop groove processed thereon in a rubber coating method of a rubber roll provided in an embodiment;

[0033] Figure 4 A sectional view of a roll shaft with a first rubber layer coated thereon in a rubber coating method of a rubber roll provided in an embodiment;

[0034] Figure 5 A sectional view of a roll shaft with a first rubber layer and a second rubber layer coated thereon in a rubber coating method of a rubber roll provided in an embodiment;

[0035] Figure 6 A sectional view of a roll shaft with a first slope surface and a second slope surface processed on the first rubber layer and the second rubber layer in a rubber coating method of a rubber roll provided in an embodiment.

[0036] The reference signs in the drawings of the specification include: a roll body 1, a shaft head 2, a first rubber layer 3, a first slope surface 31, a first side 311, a second side 312, a second rubber layer 4, a second slope surface 41, a third side 411, a fourth side 412, an annular groove 5, a water stop groove 6, and a water stop platform 7. DETAILED DESCRIPTION

[0037] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and should not be used to limit the present application.

[0038] It should be noted that the diagrams provided in the embodiments only schematically illustrate the basic concept of the present application.

[0039] The structures, proportions, sizes, etc. shown in the drawings attached to the specification are merely used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the defined conditions under which the present application can be implemented. Any modification of the structure, change of the proportional relationship or adjustment of the size, which does not affect the effects that can be produced by the present application and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present application.

[0040] The orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "intermediate", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the drawings, and are merely used to simplify the description and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance.

[0041] The rubber-coated roller provided by at least one embodiment of the present application is prepared by the following method:

[0042] The roller shaft is subjected to surface pretreatment, wherein the roller shaft comprises a roller body and shaft heads arranged at both ends of the roller body;

[0043] The first coating rubber material and the second coating rubber material are prepared, wherein the hardness of the second coating rubber material is greater than that of the first coating rubber material, so that the vulcanization fluidity of the first coating rubber material is greater than that of the second coating rubber material under the same vulcanization condition;

[0044] The surface of the roller body is coated with the first coating rubber material, and at least the surface of the shaft head is coated, so as to form a first rubber layer on the surface of the roller body and the area of the shaft head close to the roller body;

[0045] The surface of the shaft head is coated with the second coating rubber material, so as to form a second rubber layer on the surface of the area of the shaft head away from the roller body, and the second rubber layer is arranged in a spaced manner with the first rubber layer, so that an annular groove is formed between the first rubber layer and the second rubber layer;

[0046] The rubber-coated roller coated with the first rubber layer and the second rubber layer is sent into a vulcanization device for vulcanization;

[0047] The rubber-coated roller after vulcanization is subjected to machining and the first rubber layer and the second rubber layer on the surface of the shaft head are cut off.

[0048] The rubber-coated roller provided by the above embodiment is coated with the second coating rubber material having a hardness greater than that of the first coating rubber material on the shaft head, so as to form the second rubber layer on the shaft head, so that the second rubber layer can form a natural blocking tool on the shaft head, so that when the first rubber layer is converted into a fluid state at the initial stage of vulcanization and flows to the end of the roller shaft, the second rubber layer can block the flowing rubber material, thereby avoiding the adverse conditions such as the failure of the rubber surface to be shaped, the moisture erosion, and the delamination caused by the flow of the first rubber layer from the end, and the method can effectively solve the problem of the difficulty in shaping caused by the flow of the rubber material at the end of the roller body during the rubber coating process, without increasing additional process steps. Compared with the existing special structure tool, the method not only saves the time for designing, installing and dismounting the tool, simplifies the processing flow, reduces the operation difficulty, greatly improves the production efficiency, but also is suitable for rubber rollers of different diameters, has good universality, and can save the tool cost.

[0049] In addition, since the existing blocking tool usually needs to abut against the end face of the rubber layer, the rubber material is completely blocked by the blocking tool when flowing to both ends, so that the internal stress of the rubber material cannot be completely released, and the rubber roller is prone to internal cracking. In the embodiment, the annular groove is arranged between the first rubber layer and the second rubber layer, so that the rubber material can flow into the annular groove when flowing. In this way, the rubber material is blocked by the second rubber layer, and the resistance of the second rubber layer to the rubber material is reduced through the transition of the annular groove, so that the internal stress of the rubber material can be better released, the problem of internal cracking of the rubber roller is avoided, and the quality of the rubber roller is better.

[0050] Next, a rubber-coated method of a rubber roller provided by an embodiment of the present disclosure will be described in detail in combination with the accompanying drawings.

[0051] Figure 1 A flowchart of the rubber-coated method of the rubber roller provided by an embodiment of the present disclosure is shown in FIG. 1. As shown in the figure, the rubber-coated method includes the following steps. Figure 1

[0052] Step S1, surface pretreatment is performed on the roller shaft.

[0053] Referring to Figure 2 In the embodiment, the roller shaft includes a roller body 1 located in the middle and shaft heads 2 fixedly installed at both ends of the roller body 1 by thread connection or the like, and the roller shaft as a whole can be made of a metal material, such as iron, steel, etc.

[0054] For example, in the embodiment, the surface pretreatment of the roller shaft can include cleaning, grinding and the like of the surfaces of the roller body 1 and the shaft heads 2, so that the surfaces of the roller body 1 and the shaft heads 2 are clean and flat.

[0055] For example, in some embodiments, the surface pretreatment can include washing and removing dirt such as oil stains on the surfaces of the roller body 1 and the shaft heads 2 by using a cleaning agent.

[0056] For example, in some embodiments, the surface pretreatment can also include turning and grinding processing of the roller body 1 and the shaft heads 2 to remove the oxide layer on the surfaces of the roller body 1 and the shaft heads 2, so as to ensure the flatness of the surfaces of the roller body 1 and the shaft heads 2. It should be understood that, in the prior art, since the shaft heads 2 do not need to be coated, the surface treatment of the shaft heads 2 is usually not performed. In the embodiment, the surface treatment of the shaft heads 2 is performed to avoid the problem of delamination of the rubber material after the second coating rubber material is coated on the shaft heads 2, so as to improve the close fit of the second rubber layer 4 and the shaft heads 2 and ensure the blocking effect of the second rubber layer 4.

[0057] For example, in some embodiments, the surface pretreatment can also include sandblasting treatment of the surface of the roller body 1 to improve the roughness of the surface of the roller body 1, so that the rubber material is better adhered to the roller body 1 after coating, and the coating quality is ensured. ​

[0058] In some embodiments, the surface pre-treatment of the roller shaft can further include machining a water-stopping structure on the roller shaft, which can better prevent water vapor from corroding during vulcanization and ensure the quality of the rubber coating.

[0059] For example, referring to FIG. 1, the water-stopping structure can include a water-stopping platform 7 machined on the part where the shaft head 2 meets the roller body 1. Figure 3 In some embodiments, machining the water-stopping structure can include machining the water-stopping platform 7 on the part where the shaft head 2 meets the roller body 1. For example, when machining the water-stopping platform 7, the surface of the shaft head 2 can be subjected to turning processing, so that the diameter of the shaft head 2 is smaller than the diameter of the roller body 1, thereby forming a stepped structure between the shaft head 2 and the roller body 1, which is the water-stopping platform 7. The water-stopping platform 7 can block water vapor, preventing water vapor from corroding the middle part of the roller body 1 from the shaft heads 2 at both ends of the roller body 1, and ensuring the quality of the rubber coating.

[0060] For example, referring to FIG. 1, the water-stopping structure can include a water-stopping platform 7 machined on the part where the shaft head 2 meets the roller body 1. Figure 3 In some embodiments, machining the water-stopping structure can further include machining the water-stopping platform 7 on the part where the shaft head 2 meets the roller body 1. For example, when machining the water-stopping platform 7, the surface of the shaft head 2 can be subjected to turning processing, so that the diameter of the shaft head 2 is smaller than the diameter of the roller body 1, thereby forming a stepped structure between the shaft head 2 and the roller body 1, which is the water-stopping platform 7. The water-stopping platform 7 can block water vapor, preventing water vapor from corroding the middle part of the roller body 1 from the shaft heads 2 at both ends of the roller body 1, and ensuring the quality of the rubber coating.

[0061] Step S2, providing a first coating rubber material and a second coating rubber material.

[0062] In the present embodiment, the first coating rubber material and the second coating rubber material can be pre-prepared or purchased according to production requirements. For example, in some embodiments, the first coating rubber material and the second coating rubber material can be pre-prepared. Specifically, the first rubber material and the second rubber material are prepared, the prepared first rubber material and the second rubber material are put into an open mill in batches, the first rubber material is extruded into a strip or a sheet according to the coating width of the roller body 1 to form the first coating rubber material, and the second rubber material is extruded into a rubber strip according to the coating width of the shaft head 2 to form the second coating rubber material.

[0063] For example, the hardness of the first coating rubber material is 35-90 P&J (Zhao's hardness), and the hardness of the second coating rubber material is 0-1 P&J. Based on the hardness of the first coating rubber material and the second coating rubber material, when they are vulcanized under the same vulcanization condition, the vulcanization fluidity of the first coating rubber material is greater than that of the second coating rubber material, wherein the vulcanization fluidity can be understood as the fluidity of the rubber material during vulcanization. For example, the first rubber material can be a rubber material mixed from natural rubber, and the second rubber material can be a rubber material mixed from ethylene-propylene or butyronitrile.

[0064] Step S3, coating the surface of the roller body 1 with the first coating rubber material, and coating at least part of the surface of the shaft head 2.

[0065] For example, in some embodiments, the extrusion-winding coating method can be used for encapsulation. Specifically, refer to Figure 4 When encapsulating, the first coating material can be coated from the surface of the area near the roller body 1 on the shaft head 2 at the left end of the roller shaft, and continuously coated from left to right to the surface of the area near the roller body 1 on the shaft head 2 at the right end of the roller shaft, so that the first coating material is tightly wound on the entire surface of the roller body 1 and part of the surface of the shaft head 2, to form the first rubber layer 3 on the surface of the roller body 1 and the area near the roller body 1 of the shaft head 2. In this embodiment, part of the surface of the shaft head 2 is coated with the first rubber layer 3, which is to provide a cutting allowance after the first rubber layer 3 is vulcanized and formed, so as to remove the processing deviation in the subsequent processing process; and to facilitate the processing of the end surface of the first rubber layer 3 into a slope structure in the subsequent step. For example, the length of the first rubber layer 3 on the shaft head 2 can be 1 / 3-1 / 2 of the total length of the shaft head 2.

[0066] In some embodiments, after the first rubber layer 3 is coated and formed, the first rubber layer 3 is wrapped and shaped by the first wrapping belt, so that the first rubber layer 3 is tightly attached to the roller body 1, and the fitting tightness is improved. Moreover, the first wrapping belt can also inhibit the flow of the first rubber material at the initial vulcanization stage, which is beneficial to the shaping of the first rubber layer 3, and further enhances the shaping effect of the first rubber layer 3. For example, the first wrapping belt can be a special fiber cloth, adhesive tape, etc.

[0067] Step S4, the surface of the shaft head 2 is coated with the second coating material.

[0068] For example, in some embodiments, the extrusion-winding coating method can be used for encapsulation. Specifically, refer to Figure 5 When encapsulating, the first coating material can be coated from the surface of the area near the roller body 1 on the shaft head 2 at the left end of the roller shaft, and continuously coated from left to right to the surface of the area near the roller body 1 on the shaft head 2 at the right end of the roller shaft, so that the first coating material is tightly wound on the entire surface of the roller body 1 and part of the surface of the shaft head 2, to form the first rubber layer 3 on the surface of the roller body 1 and the area near the roller body 1 of the shaft head 2. In this embodiment, part of the surface of the shaft head 2 is coated with the first rubber layer 3, which is to provide a cutting allowance after the first rubber layer 3 is vulcanized and formed, so as to remove the processing deviation in the subsequent processing process; and to facilitate the processing of the end surface of the first rubber layer 3 into a slope structure in the subsequent step. For example, the length of the first rubber layer 3 on the shaft head 2 can be 1 / 3-1 / 2 of the total length of the shaft head 2.

[0069] For example, in some embodiments, the extrusion-winding coating method can be used for encapsulation. Specifically, refer to Figure 5 In this embodiment, the second rubber layer 4 is arranged in a spaced manner with the first rubber layer 3, so that the annular groove 5 can be formed between the first rubber layer 3 and the second rubber layer 4. For example, when the second rubber layer 4 is coated, the coating can be started from a position with a certain spacing from the end surface of the first rubber layer 3, so that the second rubber layer 4 can form the annular groove 5 with the first rubber layer 3 after being shaped. For another example, when the second rubber layer 4 is coated, the second coating material can be completely coated on the remaining surface of the shaft head 2, and the first rubber layer 3 and / or the second rubber layer 4 can be cut after the second rubber layer 4 is formed, to cut the annular groove 5 between the first rubber layer 3 and the second rubber layer 4.

[0070] In the embodiment, the annular groove 5 formed between the first rubber layer 3 and the second rubber layer 4 can enable the rubber material converted into fluid state in the initial vulcanization process to flow into the annular groove 5, so that the second rubber layer 4 can block the rubber material while the transition of the annular groove 5 can reduce the resistance of the second rubber layer 4 to the rubber material, so that the rubber material can better release internal stress and avoid the problem of internal cracks of the rubber roller, and the quality of the rubber roller is better.

[0071] Referring to Figure 5 In some embodiments, the length of the second rubber layer 4 on the shaft head 2 is at least half of the total length of the shaft head 2, so that the contact area between the second rubber layer 4 and the shaft head 2 can be ensured to be large enough, the connection tightness between the second rubber layer 4 and the shaft head 2 can be improved, and the second rubber layer 4 can form a stable blocking tool on the shaft head 2 to strengthen the blocking effect of the second rubber layer 4 on the flowing rubber material.

[0072] Referring to Figure 6 In some embodiments, the step S4 further includes cutting the end surface of the first rubber layer 3 to form a first slope surface 31, the first slope surface 31 is a conical surface, and the side of the first slope surface 31 away from the shaft head 2 is inclined to the direction close to the roller body 1.

[0073] For example, when the first slope surface 31 is processed, the end of the first rubber layer 3 can be cut by machining equipment to form the first slope surface 31 on the end surface of the first rubber layer 3. Referring to Figure 6 In the radial direction of the shaft head 2, the first slope surface 31 includes a first side 311 connected with the surface of the shaft head 2 and a second side 312 away from the surface of the shaft head 2, and the side of the first slope surface 31 away from the shaft head 2 can be understood as the second side 312 of the first slope surface 31. The side of the first slope surface 31 away from the shaft head 2 is inclined to the direction close to the roller body 1, which can be understood as, for example, in the example of Figure 6 the second side 312 of the first slope surface 31 at the right end of the first rubber layer 3 is inclined to the left. In this way, the first slope surface 31 forms a gentle slope structure on the end surface of the first rubber layer 3, and when the first rubber layer 3 is converted into fluid state, the rubber material can flow along the first slope surface 31, the first slope surface 31 can slow down the flow speed of the rubber material, and to a certain extent, the flow of the rubber material is inhibited, which is beneficial to the shaping of the end of the first rubber layer 3 during vulcanization. In addition, the first slope surface 31 can also increase the opening width of the annular groove 5, so as to avoid the “bridge” formed by the first rubber layer 3 and the second rubber layer 4 when they flow, that is, to avoid the “bridge” formed by the flowing first rubber material and the second rubber material at the opening of the annular groove 5, so as to avoid the problem that the rubber material flows directly along the “bridge” to the outside when the annular groove 5 is not filled with the rubber material, and to ensure the blocking effect of the second rubber layer 4 on the first rubber material.

[0074] Referring to Figure 6In the embodiment, the projection of the first slope surface 31 on the roller shaft is located on the shaft head 2. In this way, the second side 312 of the first slope surface 31 has an axial spacing with the end surface of the roller body 1, and when the rubber roller is vulcanized and formed, the first slope surface 31 can be completely cut off when cutting along the end surface of the roller body 1, thereby ensuring the quality of the rubber roller.

[0075] Referring to Figure 6 In some embodiments, step S4 further includes cutting the second rubber layer 4 towards the end surface of the roller body 1 to form a second slope surface 41, the second slope surface 41 is a conical surface, and the side of the second slope surface 41 away from the shaft head 2 is inclined away from the roller body 1.

[0076] For example, when machining the second slope surface 41, the end of the second rubber layer 4 can be machined by using a machining device to form the second slope surface 41 on the end surface of the second rubber layer 4. Similarly, referring to Figure 6 The second slope surface 41 includes a third side 411 connected to the surface of the shaft head 2 and a fourth side 412 away from the surface of the shaft head 2, based on which the aforementioned side of the second slope surface 41 away from the shaft head 2 can be understood as the fourth side 412 of the second slope surface 41. The side of the second slope surface 41 away from the shaft head 2 is inclined away from the roller body 1, which can be understood as, for example, in the example of Figure 6 the fourth side 412 of the second slope surface 41 of the second rubber layer 4 at the right end of the roller shaft is inclined to the right. In this way, the second slope surface 41 not only forms a gentle slope structure on the end surface of the second rubber layer 4, inhibits the collapse of the second rubber layer 4 to a certain extent, ensures the strength of the second rubber layer 4 itself, and improves the blocking effect of the second rubber layer 4, but also further expands the opening width of the annular groove 5, avoiding the occurrence of the "bridge" phenomenon.

[0077] In some embodiments, step S4 further includes, after the second rubber layer 4 is formed, using a second winding belt to wrap and shape the second rubber layer 4, so that the second rubber layer 4 is tightly attached to the shaft head 2, further improving the connection tightness of the second rubber layer 4 and the shaft head 2, so that it can form a stable blocking tool on the shaft head 2, and strengthen the blocking effect of the second rubber layer 4 on the flowing rubber. For example, the second winding belt can be a special fiber cloth, a rubber cloth, etc.

[0078] In this embodiment, based on the setting of step S4, a blocking fixture composed of a second rubber layer 4 is formed on the shaft head 2. This fixture can block the flow of the first rubber material in the early stage of vulcanization, avoiding the problems such as the rubber surface of the rubber roller not being able to be shaped, water vapor erosion, and delamination caused by the first rubber layer 3 flowing and collapsing from the end. Moreover, it can effectively solve the problem of difficult flow and shaping of the rubber material at the end of the roller body 1 during the rubber coating process, without adding any additional process steps. Compared with the existing specially designed structural fixtures, it not only saves the time of designing, installing, and disassembling fixtures, greatly simplifying the processing flow and reducing the difficulty of operation, but it is also applicable to rubber rollers of different diameters and has good versatility.

[0079] Step S5: The rubber roller covered with the first rubber layer 3 and the second rubber layer 4 is fed into the vulcanization equipment for vulcanization.

[0080] For example, in some embodiments, the vulcanization equipment can be a vulcanization tank. When vulcanization molding is required, the rubber roller processed in step S4 is placed in the vulcanization tank to vulcanize the first rubber layer 3 and the second rubber layer 4. In the initial stage of vulcanization, both the first rubber layer 3 and the second rubber layer 4 will transform into a fluid state. Since the fluidity of the second rubber layer 4 is less than that of the first rubber layer 3, when the first rubber layer 3 transforms into a fluid state and flows towards the end of the roller shaft, the second rubber layer 4 can block the flowing rubber material, allowing the first rubber material to fill into the annular groove 5, avoiding the situation where the rubber surface cannot be shaped due to the first rubber layer 3 collapsing from the end. Then, the first rubber material and the second rubber material are cured and molded, causing the roller shaft to be coated with rubber to form a rubber roller.

[0081] Step S6: Machining the vulcanized rubber roller and removing the first rubber layer 3 and the second rubber layer 4 located on the surface of the shaft head 2.

[0082] For example, in some embodiments, the machining of the rubber roller may include rough turning and fine turning of the rubber roller using a lathe, and rough grinding and fine grinding of the rubber roller using a grinding machine.

[0083] In this embodiment, based on the settings in step S6, after the rubber roller is vulcanized, only the second rubber layer 4, which serves as a barrier tool, needs to be cut off. There is no need to disassemble the tool or perform post-use maintenance on the tool, which reduces the difficulty of operation and improves production efficiency.

[0084] This application also provides a rubber roller, which is manufactured using the coating method of any of the above embodiments.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A method for coating a rubber roller with rubber, characterized in that, include: The roller shaft is surface pretreated, and the roller shaft includes a roller body (1) and shaft heads (2) disposed at both ends of the roller body (1). A first coated rubber compound and a second coated rubber compound are provided, wherein the hardness of the second coated rubber compound is greater than that of the first coated rubber compound, such that the vulcanization fluidity of the first coated rubber compound is greater than that of the second coated rubber compound under the same vulcanization conditions. The first coating material is used to wrap the surface of the roller body (1) and at least to a portion of the surface of the shaft head (2) to form a first adhesive layer (3) on the surface of the roller body (1) and the shaft head (2) in the area close to the roller body (1). The second coating material is used to coat the surface of the shaft head (2) to form a second adhesive layer (4) on the surface of the shaft head (2) away from the roller body (1). The second adhesive layer (4) is used as a barrier to prevent the first adhesive layer (3) from flowing to the end of the roller during vulcanization. The second adhesive layer (4) is spaced apart from the first adhesive layer (3) so that an annular groove (5) is formed between the first adhesive layer (3) and the second adhesive layer (4). The rubber roller covered with the first rubber layer (3) and the second rubber layer (4) is fed into the vulcanization equipment for vulcanization; The vulcanized rubber roller is machined and the first rubber layer (3) and the second rubber layer (4) located on the surface of the shaft head (2) are removed to remove the barrier tooling formed by the second rubber layer (4).

2. The coating method according to claim 1, characterized in that, The hardness of the first coating compound is 35-90 P&J, and the hardness of the second coating compound is 0-1 P&J.

3. The coating method according to claim 1, characterized in that, The coating method further includes cutting the end face of the first adhesive layer (3) to form a first slope (31), the first slope (31) being a conical surface, and the side of the first slope (31) away from the shaft head (2) being inclined toward the roller body (1).

4. The coating method according to claim 3, characterized in that, The projection of the first slope (31) on the roller is located on the head (2).

5. The coating method according to claim 1, characterized in that, After the first adhesive layer (3) is formed, the first adhesive layer (3) is wound and shaped using a first winding tape.

6. The coating method according to claim 1, characterized in that, The coating method further includes cutting the end face of the second adhesive layer (4) toward the roller body (1) to form a second slope (41), the second slope (41) being a conical surface, and the side of the second slope (41) away from the shaft head (2) being inclined away from the roller body (1).

7. The coating method according to claim 1, characterized in that, After the second adhesive layer (4) is formed, the second adhesive layer (4) is wound and shaped using a second winding tape.

8. The coating method according to claim 1, characterized in that, The length of the second adhesive layer (4) is at least half the length of the shaft head (2).

9. The coating method according to claim 1, characterized in that, Surface pretreatment of the roller shaft includes: Use a cleaning agent to wash away the dirt on the surfaces of the roller body (1) and the shaft head (2); and / or The roller body (1) and the shaft head (2) are machined to remove the oxide layer on the surfaces of the roller body (1) and the shaft head (2); and / or The surface of the roller (1) is sandblasted.

10. The coating method according to claim 1, characterized in that, The coating method also includes, A waterstop platform (7) is machined out at the portion where the shaft head (2) meets the roller body (1); and / or A water-stop groove (6) is machined at the end of the roller body (1).

11. A rubber roller, characterized in that, The rubber roller is made by the rubber coating method according to any one of claims 1-10.

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