WO2017024643A1 - 辊表面处理方法及表面改性的辊 - Google Patents

辊表面处理方法及表面改性的辊 Download PDF

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Publication number
WO2017024643A1
WO2017024643A1 PCT/CN2015/088809 CN2015088809W WO2017024643A1 WO 2017024643 A1 WO2017024643 A1 WO 2017024643A1 CN 2015088809 W CN2015088809 W CN 2015088809W WO 2017024643 A1 WO2017024643 A1 WO 2017024643A1
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Prior art keywords
roller
roll
elastic layer
layer
modified
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PCT/CN2015/088809
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English (en)
French (fr)
Inventor
王建峰
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苏州市创怡盛实业有限公司
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Publication of WO2017024643A1 publication Critical patent/WO2017024643A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing

Definitions

  • the invention relates to the field of preparation of rolls, in particular to a roll surface treatment method and a surface modified roll.
  • OA Office
  • a sponge roll is used, and a OA sponge roll is composed of a metal cylinder as a shaft portion and a foam such as a polyurethane foam as an elastic layer wrapped around the outer circumference of the metal cylinder.
  • the first method is to apply an adhesive or the like to a hollow or solid shaft made of a material such as a metal such as a metal, and to bond and fix the elastic layer to the outer circumference of the shaft portion, and then grind, grind or cut.
  • the method is such that the elastic layer reaches a cylindrical roller of a prescribed size.
  • the second method is similar to the first method except that a processing method such as a hot wire is used instead of grinding, grinding or cutting to process the elastic layer into a cylindrical roller having a desired size.
  • the third method is to place the shaft portion in the cavity of the mold, inject a material such as rubber or resin, and then cool the shape, and directly open the mold to obtain a cylindrical roller of a desired size.
  • the above-described method for producing a sponge roll for OA has the following disadvantages.
  • the elastic layer is subjected to grinding, grinding or cutting for processing, which tends to cause fuzzing on the surface of the elastic layer.
  • the elastic layer is processed by a hot wire, and on the one hand, it is difficult to uniformly process the outer circumference of the OA sponge roller, and on the other hand, the hot wire is liable to cause the problem that the elastic layer is hardened or the foamed hole is broken.
  • the processing is performed by injection molding. On the one hand, the cost is increased due to the necessity of manufacturing the mold, and on the other hand, the foaming state in the mold is difficult to adjust, and the surface of the sponge roller for OA is difficult to be uniform.
  • a roll surface treatment method comprising the steps of: radially compressing a roll in a circumferential direction, and heat treating the roll, wherein the roll comprises a shaft portion and an elastic layer wrapped around the outer periphery of the shaft portion to obtain a surface-modified roll .
  • the roller is radially compressed in the circumferential direction to compressively deform the elastic layer, and the roller is heat-treated to form a hot melt layer on the surface of the elastic layer to fix the compression deformation, and the surface-modified roller has a surface of the elastic layer.
  • the hot melt layer is formed to be smooth and lint-free, so that the above-mentioned roll surface treatment method can not only achieve the specified size by the roll, but also ensure the straightness and flatness of the roll in the axial direction.
  • the surface of the surface-modified roll forms a hot melt layer to increase the hardness.
  • both the compression and the heat treatment of the roller are performed by a surface treatment device, the surface treatment device is a cylinder, the roller and the surface treatment device are disposed in parallel, and the surface treatment device can be opposite
  • the shaft portion of the roller moves radially and maintains the roller tangential to the cross-section of the surface treatment device, and at least one of the roller and the surface treatment device is rotatable about the axis of the roller.
  • the roller surface treatment method further comprises the step of: radially moving the surface treatment device relative to the shaft portion of the roller during radial compression and heat treatment of the roller in a circumferential direction
  • the roller and/or the surface treatment device remain rotated about the axis of the roller.
  • the surface treatment device is rotatable along an outer peripheral wall of the roller.
  • the rolls are compressed and heat treated using a plurality of the surface treatment devices.
  • the temperature of the heat treatment is a temperature at which the elastic layer of the roller melts.
  • the elastic layer of the roller is a rubber or resin having a foamed hole.
  • a surface modified roller comprising a shaft portion and an elastic layer wrapped around an outer circumference of the shaft portion,
  • the elastic layer includes a hot melt layer and an inner layer of an elastic layer, wherein the hot melt layer is located on a surface of the elastic layer.
  • the elasticity of the inner layer of the elastic layer is unchanged.
  • the inner layer of the elastic layer is partially cured or fully cured.
  • FIG. 1 is a schematic view showing the operation of a roller surface treatment method according to an embodiment
  • FIG. 2 is a schematic view showing the operation of the apparatus shown in FIG. 1 and the structure of the apparatus on the other side.
  • Fig. 3 is a schematic view showing the structure of a surface-modified roll of an embodiment.
  • a roll surface treating method of an embodiment includes the steps of radially compressing a roll 100 in a circumferential direction and heat-treating the roll, wherein the roll 100 includes a shaft portion 110 and an elasticity wrapped around the outer periphery of the shaft portion 110. Layer 120, a surface modified roll 101 is obtained (see Figure 3).
  • the roller 100 is radially compressed in the circumferential direction to compressively deform the elastic layer 120, and the roller 100 is heat-treated to form a surface of the elastic layer 120 to form a hot melt layer 121 to fix the compression deformation, and the surface is modified. Since the roll 101 forms a hot-melt layer 121 on the surface of the elastic layer 120 to be smooth and lint-free, the above-described roll surface treatment method can both deform the roll 100 to a predetermined size and ensure the straightness and flatness of the roll 100 in the axial direction. In addition, the formation of the hot melt layer 121 (see FIG. 3) on the surface of the surface-modified roll 101 can improve the hardness.
  • the roller 100 is a roller for OA.
  • the surface of the roller 100 is subjected to compression and heat treatment using a surface treatment device 200
  • the surface treatment device 200 is a cylinder
  • the roller 100 and the surface treatment device 200 are disposed in parallel
  • the surface treatment device 200 is provided.
  • the shaft portion 110 of the roller 100 may be moved radially with respect to the shaft 100 and the cross section of the surface treatment device 200 may be tangential, and at least one of the roller 100 and the surface treatment device 200 may be rotated about the axis of the roller 100.
  • the roller 100 and the surface treatment device 200 are tangentially cross-sectionally, that is, axially in line contact, and during the compression and heat treatment of the roller 100 by the surface treatment device 200, not only at least one of the roller 100 and the surface treatment device 200 can be wound.
  • the axis of the roller 100 is rotated to make the compression and heat treatment of the roller 100 uniform, and the surface treatment device 200 can be moved radially with respect to the shaft portion 110 of the roller 100 and keep the cross section of the roller 100 and the surface treatment device 200 tangent to surface treatment.
  • the device 200 can maintain line contact as the elastic layer 120 deforms to further compress and heat treat the elastic layer 120 of the roller 100.
  • the elastic layer 120 has a small thermal conductivity (20-30 mw/mK), and the heat conduction is slow, so that the foamed holes on the surface of the elastic layer 120 are compressively deformed in the radial direction and melted by heat to form the hot melt layer 121, and the surface of the elastic layer 120 is foamed.
  • the pores are fused, the number of the foamed pores is reduced, the surface elasticity of the elastic layer is lowered, and the hardness is increased.
  • the surface-modified roll 101 has a change in the roll radius as compared with the roll 100 before the roll surface treatment method is used, and the surface of the elastic layer 120 of the surface-modified roll 101 forms the hot-melt layer 121, and the roll surface is used.
  • the radius change of the surface-modified roll 101 obtained by the treatment method includes the external deformation amount L and the internal deformation amount D, as shown in FIG.
  • the external deformation amount L is the difference between the radius of the pre-treatment roll and the surface-modified roll radius
  • the internal deformation amount D is the thickness of the hot-melt layer 121 on the surface of the elastic layer 120.
  • the external deformation amount L is 1-2 mm.
  • the internal deformation amount D is 0.5-1 Mm. It is understood that the external deformation amount L and the internal deformation amount D are not limited to this range.
  • the specific step of heat-treating the roller 100 by the surface treatment apparatus 200 is to electrically heat the surface treatment apparatus 200, and the surface treatment apparatus 200 transfers heat to the roller 100 to heat-treat the roller 100.
  • increasing the temperature of the heat treatment or lengthening the heat treatment time can increase both the amount of external deformation and the amount of internal deformation of the roller 100. Since the elastic layer 120 is a polymer material, the hot melt deformation follows the principle of time temperature equivalence, that is, the heating time and the heating temperature can have an equivalent effect on it.
  • the surface treatment device 200 is moved radially relative to the shaft portion 110 of the roller 100 and the elastic layer 120 of the roller 100 is simultaneously compressed and heat treated at a time of 1.0-2.8. Min.
  • the surface treatment device 200 is stopped when the shaft portion 110 of the roller 100 is radially moved to a preset distance value, and the roller 100 and/or The surface treatment device 200 is kept rotating about the axis of the roller 100, and the surface treatment device 200 continues to heat treat the elastic layer 120 of the roller 100 to form a thicker hot melt layer 121 on the surface of the elastic layer 120 to better fix the compression deformation. Or the hardness of the surface of the roller 100 is made larger.
  • the radial movement of the surface treatment device 200 relative to the shaft portion 110 of the roller 100 can be precisely controlled by a computer system.
  • the preset distance value can be set in advance.
  • the preset distance value may be determined according to the external deformation amount L of the desired surface-modified roller 101.
  • the preset distance value is the external deformation amount L of the desired surface-modified roller 101. It can be understood that during the actual roll surface treatment, the actual external deformation amount L of the obtained surface-modified roll 101 has a certain range deviation from the preset value because the elastic layer 120 of the surface-modified roll 101
  • the thickness of the hot melt layer 121 formed on the surface affects the amount of rebound of the elastic layer 120. The thicker the thickness of the hot melt layer 121, the smaller the amount of rebound of the elastic layer 120, and vice versa.
  • At least one of the roller 100 and the surface treatment device 200 is rotatable about the axis of the roller 100, including three cases: the roller 100 rotates about the axis of the roller 100 (ie, the roller 100 rotates); the surface treatment device 200 rotates about the axis of the roller 100. (ie, the surface treatment apparatus 200 revolves around the roll 100); and the roller 100 rotates about the axis of the roll 100 while the surface treatment apparatus 200 rotates about the axis of the roll 100.
  • the surface treatment apparatus 200 is rotatable relative to the axis of the roller 100. Specifically, the surface treatment apparatus 200 is rotatable along the outer peripheral wall of the roller 100 to achieve uniform compression and uniform heat treatment.
  • the rotational speed of the surface of the surface-modified device 101 is controlled by the rotational speed of the surface of the surface-modified device 100.
  • the rotational speed of the roller 100 or the surface treatment apparatus 200 is 10 rpm (rotation per minute).
  • the roller 100 is subjected to compression and heat treatment using a plurality of surface treatment devices 200.
  • the plurality of surface treatment devices 200 are evenly distributed on the outer circumference of the roller 100.
  • the above roller surface treatment method is suitable for processing rolls 100 of different lengths and different roll diameters.
  • the length of the surface treatment device 200 should be greater than or equal to the length of the treated roller 100 such that the compression and heat treatment experienced by the roller 100 are uniform in the axial direction.
  • the roller 100 treated by the above-described roll surface treatment method has a roll diameter of 14.0-15.2 mm.
  • the shaft portion 110 can be a hollow or solid shaft. In one of the embodiments, the shaft portion 110 is a metal cylinder.
  • the temperature of the heat treatment is a temperature at which the elastic layer 120 of the roll 100 is melted so that the foamed holes on the surface of the elastic layer are compressed and melted in the radial direction to form the hot melt layer 121.
  • the heat treatment temperature of the polyurethane (collectively referred to as polyurethane) is 190 ⁇ 10 °C.
  • the elastic layer 120 may be an elastic layer 120 such as rubber or resin having foamed holes.
  • the elastic layer 120 may be a polyester, a polyether or the like having foamed pores.
  • the elastic layer 120 is polyurethane. It can be understood that the material of the elastic layer 120 is not limited thereto.
  • the elastic layer 120 of the surface-modified roll 101 includes a hot melt layer 121 and an elastic layer inner layer 122.
  • the surface of the elastic layer 120 forms a hot melt layer 121, and the elasticity of the inner layer 122 of the elastic layer is constant. This is because the inner layer 122 of the elastic layer is compressed and deformed, but when the heat is insufficient, the external force is removed and then rebounded to the original position, the number of the foamed holes is maintained, and the elastic layer inner layer 122 is elastic.
  • the surface-modified roller 101 is superior in performance, and can satisfy the needs of the roller for elastic properties as well as a certain hardness.
  • the surface of the elastic layer 120 of the surface modified roll 101 forms a hot melt layer 121, and the inner layer 122 of the elastic layer also undergoes hot melt partial solidification or complete curing.
  • the elastic layer 120 is also partially deformed or completely deformed by increasing the temperature of the heat treatment, prolonging the heat treatment time, or increasing the rotation speed of the roller and/or the surface treatment apparatus 200, thereby partially curing or completely curing the elastic layer 120 of the roller 100.
  • a roller 100 having a relatively high hardness is obtained, which is suitable for the roller 100 having a relatively high hardness requirement.
  • roller 100 is subjected to compression and heat treatment
  • a step is further included: the roller 100 is subjected to microwave treatment and/or coating treatment as needed.
  • the above roller surface treatment method can be combined with other roller treatment methods as needed.
  • the thickness of the elastic layer 120 before the treatment is the difference between the radius of the roller before the treatment and the radius of the shaft portion 110.
  • the surface modified roll 101 has a compression density of 30% to 40%.
  • a surface-modified roll 101 of an embodiment is prepared by the above-described roll surface treatment method.
  • the surface-modified roller 101 includes a shaft portion 110 and an elastic layer 120 wrapped around the outer circumference of the shaft portion 110.
  • the elastic layer 120 includes a hot melt layer 121 and an elastic layer inner layer 122, wherein the hot melt layer 121 is located on the surface of the elastic layer 120.
  • the roller 100 can be deformed to a predetermined size, and the straightness and flatness of the roller 100 in the axial direction can be ensured.
  • the hot melt layer 121 on the surface of the surface-modified roll 101 can increase the hardness.
  • the elasticity of the inner layer 122 of the elastic layer is unchanged.
  • the inner layer 122 of the elastic layer is partially cured or fully cured.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

一种辊表面处理方法，包括以下步骤：对辊（100）沿周向进行径向压缩，并对辊进行热处理，其中所述辊包括轴部（110）和包裹在轴部外周的弹性层（120），得到表面改性的辊（101）。还公开了一种表面改性的辊。通过对辊沿周向的径向压缩使得弹性层发生压缩变形，从而使得辊达到规定的尺寸，且保证辊在轴向上的直线度和平整度；对辊进行热处理使得弹性层的表面形成热熔层（121）以使压缩变形固定，且热熔层平滑不起毛，硬度高。

Description

辊表面处理方法及表面改性的辊
【技术领域】
本发明涉及辊的制备领域，特别是涉及一种辊表面处理方法及表面改性的辊。
【背景技术】
在诸如复印机、打印机或者传真机等电子成像设备系统中，需要使用供给碳粉的送粉辊、清洁部件的清洁辊以及起传输作用的传输辊等辊，这些辊统称为OA（Office Automation）用海绵辊，OA用海绵辊由作为轴部的金属圆柱体和作为弹性层的如聚氨酯发泡体等发泡体包裹在金属圆柱体外周组成。
目前OA用海绵辊的制造方法主要有以下几种。第一种方法是根据需要将粘合剂等涂布到轴部如金属等材质制空心或实心轴上，将弹性层粘接并固定到轴部的外周上；而后采用研磨、磨削或切割等方法使弹性层达到规定尺寸的圆柱状辊。第二种方法与第一种方法相似，不同在于，利用热线等加工方法替代研磨、磨削或切割将弹性层加工成具有期望尺寸的圆柱状辊。第三种方法是将轴部置于模具的模腔中，注入橡胶或树脂等材料，然后冷却定型，开模直接得到期望尺寸的圆柱状辊。
然而上述OA用海绵辊的制造方法存在以下不足。第一种方法中弹性层经过研磨、磨削或切割进行加工容易导致弹性层表面上起毛。第二种方法中弹性层利用热线进行加工，一方面难以对OA用海绵辊的外周均匀地加工，另一方面，采用热线易产生弹性层硬化或者发泡孔破裂的问题。第三种方法中通过注射成型进行加工，一方面因制造需要模具使得成本变高，另一方面模具中的发泡状态难以调整，使OA用海绵辊的表面难以均匀。
【发明内容】
基于此，有必要提供一种不会起毛、不会发生弹性层硬化或者发泡孔破裂、成本低的辊表面处理方法及表面改性的辊。
一种辊表面处理方法，包括以下步骤：对辊沿周向进行径向压缩，并对辊进行热处理，其中所述辊包括轴部和包裹在轴部外周的弹性层，得到表面改性的辊。
上述辊表面处理方法，对辊沿周向进行径向压缩使弹性层发生压缩变形，对辊进行热处理使弹性层的表面形成热熔层以使压缩变形固定，表面改性的辊由于弹性层表面形成热熔层平滑且不起毛，因此上述辊表面处理方法既可以使辊通过变形达到规定的尺寸，又可以保证辊轴向上的直线度和平整度。另外，表面改性的辊表面形成热熔层可以提高硬度。
在其中一个实施例中，对所述辊进行压缩和热处理均采用表面处理装置，所述表面处理装置为圆柱体，所述辊和所述表面处理装置平行设置，所述表面处理装置可相对所述辊的所述轴部径向移动且保持所述辊和所述表面处理装置的截面相切，所述辊和所述表面处理装置中至少一个可绕所述辊的轴线转动。
在其中一个实施例中，所述辊表面处理方法还包括步骤：对辊沿周向进行径向压缩和热处理的过程中，所述表面处理装置相对所述辊的所述轴部径向移动达到预设距离值时停止，所述辊和/或所述表面处理装置保持绕所述辊的轴线转动。
在其中一个实施例中，所述表面处理装置可沿所述辊的外周壁转动。
在其中一个实施例中，采用多个所述表面处理装置对所述辊进行压缩和热处理。
在其中一个实施例中，所述热处理的温度为所述辊的所述弹性层发生熔化的温度。
在其中一个实施例中，所述辊的所述弹性层为具有发泡孔的橡胶或树脂。
一种表面改性的辊，包括轴部和包裹在所述轴部外周的弹性层, 所述弹性层包括热熔层和弹性层内层，其中所述热熔层位于所述弹性层的表面。
在其中一个实施例中，所述弹性层内层的弹性不变。
在其中一个实施例中，所述弹性层内层部分固化或完全固化。
【附图说明】
图1为一实施方式的辊表面处理方法的操作示意图和装置结构示意图；
图2为图1所示的操作示意图和装置结构示意图另一侧面的结构示意图。
图3为一实施方式的表面改性的辊的结构示意图。
【具体实施方式】
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳的实施例。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
参照图1，一实施方式的辊表面处理方法，包括以下步骤：对辊100沿周向进行径向压缩，并对辊进行热处理，其中辊100包括轴部110和包裹在轴部110外周的弹性层120，得到表面改性的辊101（见图3）。
上述辊表面处理方法，对辊100沿周向进行径向压缩使弹性层120发生压缩变形，对辊100进行热处理使弹性层120的表面形成热熔层121以使压缩变形固定，表面改性的辊101由于弹性层120表面形成热熔层121平滑且不起毛，因此上述辊表面处理方法既可以使辊100通过变形达到规定的尺寸，又可以保证辊100轴向上的直线度和平整度。另外，表面改性的辊101表面形成热熔层121（见图3）可以提高硬度。
在其中一个实施例中，辊100为OA用辊。
继续参照图1和图2，在其中一个实施例中，对辊100进行压缩和热处理采用表面处理装置200，表面处理装置200为圆柱体，辊100和表面处理装置200平行设置，表面处理装置200可相对辊100的轴部110径向移动且保持辊100和表面处理装置200的截面相切，辊100和表面处理装置200中至少一个可绕辊100的轴线转动。上述辊表面处理方法，辊100和表面处理装置200截面相切即轴向上线接触，表面处理装置200对辊100进行压缩和热处理的过程中，不仅辊100和表面处理装置200中至少一个可绕辊100的轴线转动以使辊100受到的压缩作用和热处理均匀，而且表面处理装置200可相对辊100的轴部110径向移动且保持辊100和表面处理装置200的截面相切从而使表面处理装置200可随着弹性层120变形保持线接触以对辊100的弹性层120进一步进行压缩和热处理。另外，弹性层120导热系数小（为20-30mw/mK）热传导较慢，因而弹性层120表面的发泡孔在径向上压缩变形并受热熔化形成热熔层121，弹性层120表面的发泡孔发生熔合，发泡孔的数量减少，弹性层表面弹性下降，硬度提高。
其中，表面改性的辊101与采用上述辊表面处理方法处理前的辊100相比，辊半径发生了变化，且表面改性的辊101的弹性层120表面形成热熔层121，采用辊表面处理方法处理得到的表面改性的辊101半径变化包括外部变形量L和内部变形量D，如图3所示。其中，外部变形量L即为处理前辊半径与表面改性的辊半径的差值，内部变形量D即为弹性层120表面的热熔层121的厚度。
优选的，外部变形量L为1-2 mm。优选的，内部变形量D为0.5-1 mm。可以理解，外部变形量L和内部变形量D并不限于此范围。
在其中一个实施例中，采用表面处理装置200对辊100进行热处理的具体步骤为：对表面处理装置200进行电加热，表面处理装置200将热量传递给辊100从而对辊100进行热处理。
在其中一个实施例中，提高热处理的温度或延长热处理的时间，可使辊100的外部变形量和内部变形量均增加。因弹性层120为高分子材料，其热熔变形遵循时温等效原理，即加热时间与加热温度能对其产生等效的影响。
在其中一个实施例中，表面处理装置200相对辊100的轴部110径向移动且对辊100的弹性层120同时进行压缩和热处理的时间为1.0-2.8 min。
在其中一个实施例中，对辊100沿周向进行径向压缩和热处理的过程中，表面处理装置200相对辊100的轴部110径向移动达到预设距离值时停止，辊100和/或表面处理装置200保持绕辊100的轴线转动，表面处理装置200对辊100的弹性层120继续进行热处理，以使弹性层120的表面形成更厚的热熔层121从而使压缩变形更好的固定或使辊100表面的硬度更大。
在其中一个实施例中，表面处理装置200相对辊100的轴部110径向移动可通过计算机系统精确控制。
其中，预设距离值可预先设置。在本实施方式中，预设距离值可根据期望的表面改性的辊101的外部变形量L确定。优选的，预设距离值为期望的表面改性的辊101的外部变形量L。可以理解，在实际的辊表面处理过程中，得到的表面改性的辊101的实际外部变形量L与预设值会有一定范围的偏差，这是因为表面改性的辊101的弹性层120表面形成的热熔层121的厚度会影响弹性层120的反弹量，热熔层121的厚度越厚，弹性层120的反弹量越小，反之亦然。
其中，辊100和表面处理装置200中至少一个可绕辊100的轴线转动，包括三种情况：辊100绕辊100的轴线转动（即辊100自转）；表面处理装置200绕辊100的轴线转动（即表面处理装置200绕辊100公转）；以及辊100绕辊100的轴线转动同时表面处理装置200绕辊100的轴线转动。
在其中一个实施例中，表面处理装置200可相对辊100的轴线转动，具体的：表面处理装置200可沿辊100的外周壁转动以实现均匀压缩和均匀热处理。
在其中一个实施例中，控制辊100或表面处理装置200的转速来调节表面改性后的辊101的表面热熔层121的厚度及形成速度。辊100和/或表面处理装置200的转速越大，内部变形量D越大。辊100和/或表面处理装置200的转速越小，内部变形量D越小。
在其中一个实施例中，辊100或表面处理装置200的转速为10 rpm（转每分）。
在其中一个实施例中，采用多个表面处理装置200对辊100进行压缩和热处理。优选的，多个表面处理装置200均匀分布在辊100的外周。
上述辊表面处理方法适用于处理不同长度和不同辊径的辊100。优选的，表面处理装置200的长度应大于或等于所处理的辊100的长度，以使辊100受到的压缩作用和热处理在轴向上是均匀的。
在其中一个实施例中，上述辊表面处理方法处理的辊100的辊直径为14.0-15.2 mm。
在其中一个实施例中，轴部110可为空心或实心轴。在其中一个实施例中，轴部110为金属圆柱体。
优选的，热处理的温度为辊100的弹性层120发生熔化的温度，以使弹性层表面的发泡孔在径向上压缩熔化形成热熔层121。优选的，聚氨酯（全称为聚氨基甲酸酯）的热处理温度为190±10℃。
在其中一个实施例中，弹性层120可为具有发泡孔的橡胶或树脂等弹性层120。优选的，弹性层120可为具有发泡孔的聚酯类、聚醚类等材料。其中，在本实施例中，优选的，弹性层120为聚氨酯。可以理解，弹性层120的材料并不限于此。
在其中一个实施例中，表面改性的辊101的弹性层120包括热熔层121和弹性层内层122，弹性层120表面形成热熔层121，弹性层内层122的弹性不变。这是因为弹性层内层122部受压缩变形但受热不足时，外力撤除后便回弹至原位，其发泡孔的数量维持不变，弹性层内层122弹性不变。该表面改性的辊101性能优越，既能满足辊对于弹性性能的需要，又能保证一定的硬度。
可以理解，在另一个实施例中，表面改性的辊101的弹性层120表面形成热熔层121，弹性层内层122也发生热熔部分固化或完全固化。通过提高热处理的温度、延长热处理的时间或提高辊和/或表面处理装置200的转速，使弹性层内层122也发生变形或完全变形，从而使辊100的弹性层120部分固化或完全固化，从而得到硬度较大的辊100，适用于对硬度需求比较大的辊100。
在其中一个实施例中，在对辊100进行压缩和热处理后，还包括步骤：根据需要对辊100进行微波处理和/或涂覆处理。上述辊表面处理方法可根据需要与其他辊处理方式多重组合。
继续参照图3，表面改性的辊101的性能变化除了用外部变形量L和内部变形量D表示，还可用压缩密度表示表面改性的辊101的压缩程度，压缩密度=（外部变形量L+内部变形量D）/处理前弹性层120的厚度×100%。其中，处理前弹性层120的厚度为处理前的辊半径与轴部110半径的差值。
在其中一个实施例中，表面改性的辊101的压缩密度为30%-40%。
参照图3，一实施方式的表面改性的辊101，采用上述的辊表面处理方法制备得到。上述表面改性的辊101包括轴部110和包裹在轴部110外周的弹性层120, 弹性层120包括热熔层121和弹性层内层122，其中热熔层121位于弹性层120的表面。
上述表面改性的辊101，由于弹性层120表面形成热熔层121平滑且不起毛，既可以使辊100通过变形达到规定的尺寸，又可以保证辊100轴向上的直线度和平整度。另外，表面改性的辊101表面的热熔层121可以提高硬度。
在其中一个实施例中，弹性层内层122的弹性不变。
在其中一个实施例中，弹性层内层122发生部分固化或完全固化。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种辊表面处理方法，其特征在于，包括以下步骤：对辊沿周向进行径向压缩，并对辊进行热处理，其中所述辊包括轴部和包裹在轴部外周的弹性层，得到表面改性的辊。
  2. 根据权利要求1所述的辊表面处理方法，其特征在于，对所述辊进行压缩和热处理均采用表面处理装置，所述表面处理装置为圆柱体，所述辊和所述表面处理装置平行设置，所述表面处理装置可相对所述辊的所述轴部径向移动且保持所述辊和所述表面处理装置的截面相切，所述辊和所述表面处理装置中至少一个可绕所述辊的轴线转动。
  3. 根据权利要求2所述的辊表面处理方法，其特征在于，对辊沿周向进行径向压缩和热处理的过程中，所述表面处理装置相对所述辊的所述轴部径向移动达到预设距离值时停止，所述辊和/或所述表面处理装置保持绕所述辊的轴线转动。
  4. 根据权利要求2所述的辊表面处理方法，其特征在于，所述表面处理装置可沿所述辊的外周壁转动。
  5. 根据权利要求2所述的辊表面处理方法，其特征在于，采用多个所述表面处理装置对所述辊进行压缩和热处理。
  6. 根据权利要求1所述的辊表面处理方法，其特征在于，所述热处理的温度为所述辊的所述弹性层发生熔化的温度。
  7. 根据权利要求1所述的辊表面处理方法，其特征在于，所述辊的所述弹性层为具有发泡孔的橡胶或树脂。
  8. 一种表面改性的辊，其特征在于，包括轴部和包裹在所述轴部外周的弹性层, 所述弹性层包括热熔层和弹性层内层，其中所述热熔层位于所述弹性层内层的表面。
  9. 根据权利要求8所述的表面改性的辊，其特征在于，所述弹性层内层的弹性不变。
  10. 根据权利要求8所述的表面改性的辊，其特征在于，所述弹性层内层部分固化或完全固化。
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