CN114488731A - Drive roller, drive roller manufacturing method, and printing apparatus - Google Patents
Drive roller, drive roller manufacturing method, and printing apparatus Download PDFInfo
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- CN114488731A CN114488731A CN202210125879.7A CN202210125879A CN114488731A CN 114488731 A CN114488731 A CN 114488731A CN 202210125879 A CN202210125879 A CN 202210125879A CN 114488731 A CN114488731 A CN 114488731A
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- 238000007639 printing Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000011527 polyurethane coating Substances 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims description 71
- 239000011248 coating agent Substances 0.000 claims description 65
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 34
- 239000011247 coating layer Substances 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 19
- 239000000377 silicon dioxide Substances 0.000 claims description 17
- 238000012546 transfer Methods 0.000 description 42
- 229920001971 elastomer Polymers 0.000 description 37
- 230000003068 static effect Effects 0.000 description 24
- 239000010410 layer Substances 0.000 description 22
- 230000005611 electricity Effects 0.000 description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 230000003746 surface roughness Effects 0.000 description 9
- 239000004814 polyurethane Substances 0.000 description 8
- 229920002635 polyurethane Polymers 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000013518 transcription Methods 0.000 description 5
- 230000035897 transcription Effects 0.000 description 5
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 229910052711 selenium Inorganic materials 0.000 description 4
- 239000011669 selenium Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000011231 conductive filler Substances 0.000 description 2
- 229920001940 conductive polymer Polymers 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
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- 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
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0105—Details of unit
-
- 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
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6529—Transporting
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
The invention relates to a driving roller, a manufacturing method of the driving roller and a printing device. According to the driving roller, the driving roller manufacturing method and the printing device, the polyurethane coating is formed on the surface of the base material, so that the driving roller is low in cost on the basis of ensuring the working requirement of the driving roller, and the polyurethane coating is not separated out, so that the problem that the driving roller possibly slips due to the separated out materials when a driving belt is driven is avoided.
Description
Technical Field
The present invention relates to the field of printing apparatus accessories, and more particularly, to a driving roller, a method of manufacturing the driving roller, and a printing apparatus.
Background
In a printing apparatus such as a color laser printer and a color laser copier, a drive roller is used to drive a transfer belt and provide a stable driving force to the transfer belt.
At present, the driving roller is mostly coated with a rubber layer on the outer surface of a trident aluminum pipe or an iron shaft to meet the working requirement of the driving roller, and the outer surface of the rubber needs to be ground when the rubber is formed, so that the cost is high, and precipitates are easy to appear on the surface of the rubber layer after the rubber is used for a period of time to cause the belt to slip.
Disclosure of Invention
In view of the above, it is necessary to provide a driving roller which is low in cost and free from precipitation, in order to solve the problems that the rubber layer of the driving roller is high in cost and precipitates are likely to occur.
The present invention provides, in one aspect, a drive roller comprising a substrate and a coating layer formed on a surface of the substrate, wherein the coating layer comprises a polyurethane coating layer.
In one embodiment, the coating has a thickness in the range of 50 microns to 60 microns. When the thickness of the coating layer is less than 50 μm, the hardness of the driving roller is too high, and the transfer belt is easily damaged. Further, the driving roller needs to provide a stable conveying force for the transfer belt, and when the coating thickness is greater than 60 μm, the hardness requirement of the driving roller cannot be satisfied, and the transfer belt cannot be reliably conveyed.
In one embodiment, the coating hardness is HB pencil hardness to 2H pencil hardness. When the coating hardness is greater than the 2H pencil hardness, the hardness of the driving roller is too high, and the transfer belt is easily damaged. Further, the driving roller needs to provide a stable conveying force for the transfer belt, and when the coating hardness is less than HB pencil hardness, the hardness requirement of the driving roller cannot be satisfied, and the transfer belt cannot be reliably conveyed.
In one embodiment, the coating is a conductive coating. The conductive coating has the ability to conduct current and discharge accumulated static charge, which can be removed by the conductive coating.
In one embodiment, the coating resistance is less than 1 × 107Ohm. If the resistance value of the coating is too large, static electricity is easy to generate and cannot be discharged by the coating.
In one embodiment, silica is added to the polyurethane coating. Silica can increase the roughness of the coating, and is a hard, brittle, insoluble solid, generally colorless, transparent crystal or white powder, chemically stable, and can avoid chemical reaction with other coatings to cause the change of the coating properties.
In one embodiment, the roughness of the coating surface is between 0.3 microns and 0.8 microns. Can avoid skidding between drive roller and the transcription belt through the coating that has roughness, when roughness is less than 0.3 micron, then frictional force between drive roller and the transcription belt is less, easily takes place relative slip between drive roller and the transcription belt, and when roughness is greater than 0.8 micron, then frictional force between drive roller and the transcription belt is too big, and the drive roller is difficult to smoothly carry out the transmission to the transcription belt.
In one embodiment, the coating diameter is less than 0.01 mm with poor precision. The diameter range is the difference between the maximum value and the minimum value of the diameter, the precision of the diameter range is high, and the phenomenon of deviation can be avoided when the transfer belt runs at high speed.
In still another aspect of the present invention, there is also provided a method of manufacturing a driving roller, including the steps of:
providing a base material;
forming a coating layer with a preset thickness on the outer surface of the base material;
wherein the coating comprises a polyurethane coating.
In still another aspect of the present invention, there is provided a printing apparatus including the above-described drive roller.
According to the driving roller, the manufacturing method of the driving roller and the printing device, the polyurethane coating is formed on the surface of the base material, so that the driving roller is low in cost on the basis of ensuring the working requirement of the driving roller, and the polyurethane coating is not separated out, so that the problem that the driving roller possibly slips due to the separated out materials when a driving belt is driven is avoided.
Drawings
FIG. 1 is a schematic view of a driving roller according to an embodiment of the present invention;
fig. 2 is a flow chart illustrating a method for manufacturing a driving roller according to an embodiment of the present invention.
Description of reference numerals:
100. a drive roller; 10. a substrate; 20. and (4) coating.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Furthermore, the drawings are not 1: 1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.
In order to facilitate understanding of the technical solution of the present invention, prior art driving rollers, a method for manufacturing the driving rollers, and a printing apparatus will be described first before detailed description.
The printing device mainly includes a printer, a copier, a printing machine, etc., wherein the printing principle is explained by taking a laser printer as an example. The laser printer combines the principles and the technologies of the imaging and the electronics to generate images, laser emitted by a laser emitter is sequentially swept from one end of a selenium drum to the other end of the selenium drum, the selenium drum is pre-charged, when light irradiates, the irradiated part can generate resistance change, and finally a latent image consisting of charges is formed on the surface of the selenium drum. The toner cartridge rotates while the printing paper is fed by the transmission system and is charged with the same polarity as the surface of the toner cartridge, then the paper passes through the toner cartridge, toner on the surface of the toner cartridge is attracted to the printing paper to form an image, the toner is melted by high-temperature heating and is fixed on the surface of the paper in the cooling process.
The transmission system mainly comprises a driving roller and a transfer belt (not shown in the figure), and the driving roller support is one of belt support modes widely adopted in belt conveying, so that the friction resistance during conveying can be effectively reduced. As the background art shows, the conventional driving roller usually adopts a rubber layer to wrap a trident aluminum pipe or an iron shaft, and a rubber product is influenced by a vulcanization system, so that the problem of the precipitation of a matching auxiliary agent in the rubber is solved. The additive precipitation is the phenomenon that the unvulcanized rubber (rubber compound or semi-finished product) or vulcanized rubber (finished product) in the rubber processing process migrates from the inside to the surface of the rubber due to the supersaturation of the concentration of the additive.
Therefore, it is necessary to provide a driving roller 100, a method of manufacturing the driving roller, and a printing apparatus, which are low in cost and free from deposition.
For the purpose of illustration, the drawings show only the structures associated with embodiments of the invention.
Fig. 1 shows a schematic structural view of a driving roller according to an embodiment of the present invention, and as shown in fig. 1, an embodiment of the present invention provides a driving roller 100 including a substrate 10 and a coating layer 20, the coating layer 20 being formed on a surface of the substrate 10, wherein the coating layer 20 includes a polyurethane coating layer 20.
Specifically to the present embodiment, the polyurethane coating 20 is sprayed onto the surface of the substrate 10. The spray coating is a coating method in which the coating is applied to the surface of the object to be coated by dispersing the droplets into uniform and fine droplets by means of a spray gun or a disc atomizer by means of pressure or centrifugal force, so that the coating layer 20 can be uniformly formed on the surface of the substrate 10 by means of the spray coating.
It should be noted that the coating 20 in the present application may be a clear coating or a colored coating. Preferably, the coating layer 20 is a black coating layer so that it can be easily observed whether the coating layer 20 is uniformly formed on the surface of the substrate 10.
According to the driving roller 100 provided by the application, the polyurethane coating 20 is formed on the surface of the base material 10, so that the driving roller 100 is low in cost on the basis of ensuring the working requirement of the driving roller 100, and the polyurethane coating 20 is not separated out, so that the slipping problem possibly caused by the separated out materials when the driving roller 100 drives a belt is avoided.
In some embodiments, the substrate 10 is an aluminum tube or an iron shaft. Thus, the hardness requirement of the driving roller 100 can be secured by the base material 10, and the cost of the aluminum pipe or the iron shaft is low, thereby reducing the cost of the driving roller 100.
In some embodiments, the coating 20 has a very poor diameter accuracy of less than 0.01 millimeters. It should be noted that the diameter range refers to the difference between the maximum value and the minimum value of the diameter, so that the precision of the diameter range is high, and the phenomenon of offset can be avoided when the transfer belt runs at high speed.
It should be noted that, the manufacturing process of the conventional driving roller 100 is complicated, a rubber layer needs to be coated on the outer surface of the base material 10, and then a rubber layer is wrapped on the outer surface of the base material 10 through the rubber layer to form the driving roller 100, and after the rubber is formed, various properties of the rubber layer need to be improved through secondary vulcanization, so that the rubber layer can obtain physical properties, chemical properties and other properties which can meet the use requirements of the driving roller 100. The rubber layer surface must be ground after the rubber is vulcanized to improve the diameter tolerance of the rubber layer and avoid the drive roller 100 from shifting during high speed belt operation due to excessive diameter tolerance of the rubber layer. However, the diameter of the rubber is limited to 0.03 mm or less due to the performance of the rubber.
The polyurethane coating 20 has excellent properties such as wear resistance, high mechanical strength, high elasticity, aging resistance, corrosion resistance, etc., and the polyurethane itself has strong adhesiveness, and can be directly and tightly adhered to the substrate 10 without an additional adhesive layer or adhesive. The polyurethane coating 20 can be uniformly attached to the outer surface of the base material 10 in a spraying mode, the diameter range accuracy can reach below 0.01 mm, and the belt can be prevented from deviating under the condition of high-speed running.
In some embodiments, the coating 20 has a thickness in the range of 50 microns to 60 microns. The inventors have found that when the thickness of the coating layer 20 is less than 50 μm, the hardness of the driving roller 100 is too high, and the transfer belt is easily damaged. Further, the driving roller 100 needs to provide a stable conveying force for the transfer belt, and when the coating layer 20 has a thickness of more than 60 μm, the hardness requirement of the driving roller 100 cannot be satisfied, and the transfer belt cannot be reliably conveyed.
It is to be understood that the coating 20 may have a thickness of 50 microns, 51 microns, 52 microns, 53 microns, 54 microns, 55 microns, 56 microns, 57 microns, 58 microns, 59 microns, or 60 microns.
In some embodiments, the coating 20 hardness is from HB pencil hardness to 2H pencil hardness. The inventors have found that, when the hardness of the coating layer 20 is greater than the 2H pencil hardness, the hardness of the drive roller 100 is too high, and the transfer belt is easily damaged. Further, the driving roller 100 needs to provide a stable conveying force for the transfer belt, and when the hardness of the coating layer 20 is less than HB pencil hardness, the hardness requirement of the driving roller 100 cannot be satisfied, and the transfer belt cannot be reliably conveyed.
It is understood that the coating 20 hardness may be an HB pencil hardness, an H pencil hardness, or a 2H pencil hardness.
In some embodiments, the coating 20 is a conductive coating. In this manner, the conductive coating has the ability to conduct current and discharge accumulated static charge, which can be removed by the conductive coating.
Specifically, in some embodiments, the polyurethane coating 20 is added with a conductive polymer or a conductive filler, so that the polyurethane can be used as a skeleton, and then the conductive polymer or the conductive filler is added, so that the excellent physical properties of the polyurethane and the conductivity of the conductive substance are combined to form the polyurethane coating 20 with the conductive function.
Static electricity is a static charge or a static charge (a flowing charge forms a current). Static electricity is formed when charges are accumulated on an object or a surface, and the charges are classified into positive charges and negative charges, that is, the static electricity phenomenon is also classified into two kinds, i.e., positive static electricity and negative static electricity. When positive charges are accumulated on an object, positive static electricity is formed, when negative charges are accumulated on an object, negative static electricity is formed, but whether the positive static electricity or the negative static electricity, when an object with static electricity is contacted with a zero potential object (a grounding object) or an object with potential difference with the zero potential object, charge transfer occurs, when two different objects are contacted with each other, one object loses some charges such as electrons and is transferred to the other object to enable the other object to be positively charged, and the other object obtains some objects with residual electrons and is negatively charged. If the charge is difficult to neutralize during the separation process, the charge can build up to electrostatically charge the object.
It should also be mentioned that during printing, as a result of the frequent impacts, frictions and contacts between different substances, almost all objects involved in the printing process are electrostatically charged. Static electricity generated in the printing process can lead printing materials to adsorb dust, reduce printing quality, and the static electricity between the paper sheets can cause the problems of double-sheet paper feeding, paper plate sticking, ink splashing, roller sticking, uneven powder scattering, paper outlet part blockage or paper irregularity, next process fault and the like.
In some embodiments, the coating 20 has a resistance of less than 1 × 107Ohm. Thus, the coating 20 is too resistant to generate static electricity and cannot discharge the static electricity.
In some embodiments, silica is added to the polyurethane coating 20. Thus, silica can increase the roughness of the coating 20, and silica is a hard, brittle, insoluble solid, typically a colorless, transparent crystal or white powder, chemically stable, and can avoid chemical reactions with other coatings 20 that can cause changes in the properties of the coating 20. It should be noted that the silica is added to the polyurethane coating 20, which refers to the polyurethane coating 20 doped with silica, wherein the polyurethane is a continuous phase, and the silica is dispersed in the continuous phase of the polyurethane. Of course, in other embodiments, the polyurethane coating 20 may be a pure polyurethane coating without other additives.
Specifically to the embodiments of the present application, the roughness of the surface of the coating 20 is 0.3 to 0.8 microns. In this manner, slipping between the drive roller 100 and the transfer belt can be avoided by the coating layer 20 having roughness. The inventors have found that when the surface roughness is less than 0.3 μm, the friction between the driving roller 100 and the transfer belt is small, and the driving roller 100 and the transfer belt are likely to slide relative to each other, and when the surface roughness is greater than 0.8 μm, the friction between the driving roller 100 and the transfer belt is too large, and the driving roller 100 is difficult to smoothly drive the transfer belt.
It is understood that the surface roughness may be 0.3 microns, 0.35 microns, 0.4 microns, 0.45 microns, 0.5 microns, 0.55 microns, 0.6 microns, 0.65 microns, 0.7 microns, 0.75 microns, or 0.8 microns.
In order to verify the driving effect of the driving roller 100 of the prior art and the present application on the transfer belt, the inventors have pertinently performed verification tests, and the test results are shown in table 1:
TABLE 1
Wherein "-" in Table 1 indicates that the thickness of the coating material was 0 or no such substance.
As can be seen from Table 1, the comparative examples 1 and 2, which are made of rubber, had a very poor accuracy of only 0.03 mm in outer diameter, and the comparative examples 3 and 4, which were made of acrylic paint and silicone paint, had a very small surface roughness, although having a very poor accuracy of 0.01 mm in outer diameter, resulting in belt slippage. The polyurethane coating in example 1 has the resistance value of 1X10, the coating thickness is too small, the hardness of the driving roller is too small, the belt can slip, and the resistance value in example 4 is too small7The static electricity cannot be removed due to the resistance of the resistor, thereby generating abnormal noise.
From the above test results, when the driving roller 100 of the present application is used, the outer diameter extremely poor accuracy is high, the belt slip and the belt deviation do not occur, and the static electricity can be removed without any abnormal noise, so that the working requirement of the driving roller 100 is satisfied.
Fig. 2 is a schematic flow chart of a method for manufacturing a driving roller according to an embodiment of the present invention, and as shown in fig. 2, based on the same inventive concept, the present application further provides a method for manufacturing a driving roller, including the steps of:
s110: providing a substrate 10;
specifically, the substrate 10 is an aluminum tube or an iron shaft. Thus, the hardness requirement of the driving roller 100 can be secured by the base material 10, and the cost of the aluminum pipe or the iron shaft is low, thereby reducing the cost of the driving roller 100. Preferably, the substrate 10 is a trifurcated aluminum tube.
S120: forming a coating layer 20 of a predetermined thickness on an outer surface of the substrate 10;
wherein the coating 20 comprises a polyurethane coating 20.
Thus, by forming the polyurethane coating 20 on the surface of the base material 10, the driving roller 100 has low cost while ensuring the working requirement of the driving roller 100, and the polyurethane coating 20 is not separated out, thereby avoiding the slipping problem of the driving roller 100 caused by the separated out material during driving the belt.
Specifically to the present embodiment, the polyurethane coating 20 is sprayed onto the surface of the substrate 10. The spray coating is a coating method in which the coating is applied to the surface of the object to be coated by dispersing the droplets into uniform and fine droplets by means of a spray gun or a disc atomizer by means of pressure or centrifugal force, so that the coating layer 20 can be uniformly formed on the surface of the substrate 10 by means of the spray coating.
Further, the coating 20 has a very poor accuracy of less than 0.01 mm in diameter. The diameter range is the difference between the maximum value and the minimum value of the diameter, so that the precision of the diameter range is high, and the phenomenon of deviation can be avoided when the transfer belt runs at high speed.
It should be noted that, the manufacturing process of the conventional driving roller 100 is complicated, a rubber layer needs to be coated on the outer surface of the base material 10, and then a rubber layer is wrapped on the outer surface of the base material 10 through the rubber layer to form the driving roller 100, and after the rubber is formed, various properties of the rubber layer need to be improved through secondary vulcanization, so that the rubber layer can obtain physical properties, chemical properties and other properties which can meet the use requirements of the driving roller 100. The rubber layer surface must be ground after the rubber is vulcanized to improve the diameter tolerance of the rubber layer and avoid the drive roller 100 from shifting during high speed belt operation due to excessive diameter tolerance of the rubber layer. However, the diameter of the rubber is limited to 0.03 mm or less due to the performance of the rubber.
The polyurethane coating 20 has excellent properties such as wear resistance, high mechanical strength, high elasticity, aging resistance, corrosion resistance, etc., and the polyurethane itself has strong adhesiveness, and can be directly and tightly adhered to the substrate 10 without an additional adhesive layer or adhesive. The polyurethane coating 20 can be uniformly attached to the outer surface of the base material 10 in a spraying mode, the diameter range accuracy can reach below 0.01 mm, and the belt can be prevented from deviating under the condition of high-speed running.
In some embodiments, silica is added to the polyurethane coating 20. Thus, silica can increase the roughness of the coating 20, and silica is a hard, brittle, insoluble solid, typically a colorless, transparent crystal or white powder, chemically stable, and can avoid chemical reactions with other coatings 20 that can cause changes in the properties of the coating 20. It should be noted that the silica is added to the polyurethane coating 20, which refers to the polyurethane coating 20 doped with silica, wherein the polyurethane is a continuous phase, and the silica is dispersed in the continuous phase of the polyurethane. Of course, in other embodiments, the polyurethane coating 20 may be a pure polyurethane coating without other additives.
Specifically to the embodiments of the present application, the roughness of the surface of the coating 20 is 0.3 to 0.8 microns. In this manner, slipping between the drive roller 100 and the transfer belt can be avoided by the coating layer 20 having roughness. The inventors have found that when the surface roughness is less than 0.3 μm, the friction between the driving roller 100 and the transfer belt is small, and the driving roller 100 and the transfer belt are likely to slide relative to each other, and when the surface roughness is greater than 0.8 μm, the friction between the driving roller 100 and the transfer belt is too large, and the driving roller 100 is difficult to smoothly drive the transfer belt.
It is understood that the surface roughness may be 0.3 microns, 0.35 microns, 0.4 microns, 0.45 microns, 0.5 microns, 0.55 microns, 0.6 microns, 0.65 microns, 0.7 microns, 0.75 microns, or 0.8 microns.
Based on the same inventive concept, the present application also provides a printing apparatus including the above-described driving roller 100.
The driving roller 100, the manufacturing method of the driving roller 100 and the printing device provided by the embodiment of the application have at least the following beneficial effects:
(1) by forming the polyurethane coating 20 on the surface of the base material 10, the driving roller 100 has low cost on the basis of ensuring the working requirement of the driving roller 100, and the polyurethane coating 20 is not separated out, so that the problem of possible slippage of the driving roller 100 due to the separated out materials during driving of a driving belt is avoided.
(2) The thickness of the coating 20 ranges from 50 microns to 60 microns. When the thickness of the coating layer 20 is less than 50 μm, the hardness of the driving roller 100 is too large, and damage to the transfer belt is easily caused. Further, the driving roller 100 needs to provide a stable conveying force for the transfer belt, and when the coating layer 20 has a thickness of more than 60 μm, the hardness requirement of the driving roller 100 cannot be satisfied, and the transfer belt cannot be reliably conveyed.
(3) The hardness of the coating 20 is HB pencil hardness to 2H pencil hardness. When the coating layer 20 has a hardness greater than 2H pencil hardness, the hardness of the driving roller 100 is too high, and the transfer belt is easily damaged. Further, the driving roller 100 needs to provide a stable conveying force for the transfer belt, and when the hardness of the coating layer 20 is less than HB pencil hardness, the hardness requirement of the driving roller 100 cannot be satisfied, and the transfer belt cannot be reliably conveyed.
(4) The conductive coating 20 has the ability to conduct electrical current and dissipate accumulated static charge, which can be removed by the conductive coating 20.
(5) The coating 20 has a resistance value of less than 1x107Ohmic, thereby avoiding the coating 20 being too resistive to generate static electricity and unable to discharge static electricity itself.
(6) The silica coating 20 increases the roughness of the coating 20, and silica is a hard, brittle, insoluble solid, typically a colorless, transparent crystal or white powder, chemically stable, and capable of avoiding chemical reactions with other coatings 20 that may cause changes in the properties of the coating 20.
(7) The coating 20 with roughness can prevent slipping between the driving roller 100 and the transfer belt, when the surface roughness is less than 0.3 micron, the friction between the driving roller 100 and the transfer belt is small, relative sliding is easy to occur between the driving roller 100 and the transfer belt, and when the surface roughness is more than 0.8 micron, the friction between the driving roller 100 and the transfer belt is too large, and the driving roller 100 is difficult to smoothly transmit the transfer belt.
(8) The diameter of the coating 20 has a very poor precision of less than 0.01 mm, and the phenomenon of offset can be avoided when the transfer belt runs at a high speed.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A drive roller, comprising:
a substrate;
a coating layer formed on a surface of the substrate;
wherein the coating comprises a polyurethane coating.
2. The drive roll of claim 1, wherein the coating has a thickness in the range of 50 microns to 60 microns.
3. The drive roll of claim 1, wherein the coating hardness is from HB pencil hardness to 2H pencil hardness.
4. The drive roll of claim 1, wherein the coating is a conductive coating.
5. The drive roll of claim 4, wherein the coating resistance is less than 1x107Ohm.
6. The drive roll of claim 1, wherein silica is added to the polyurethane coating.
7. The drive roll of claim 1, wherein the coating surface has a roughness of 0.3 to 0.8 microns.
8. The drive roll of claim 1, wherein the coating diameter is minimally accurate to less than 0.01 mm.
9. A method of manufacturing a drive roller, comprising the steps of:
providing a base material;
forming a coating layer with a preset thickness on the outer surface of the base material;
wherein the coating comprises a polyurethane coating.
10. A printing unit, characterized in that it comprises a drive roller according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210125879.7A CN114488731A (en) | 2022-02-10 | 2022-02-10 | Drive roller, drive roller manufacturing method, and printing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210125879.7A CN114488731A (en) | 2022-02-10 | 2022-02-10 | Drive roller, drive roller manufacturing method, and printing apparatus |
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| CN114488731A true CN114488731A (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210125879.7A Pending CN114488731A (en) | 2022-02-10 | 2022-02-10 | Drive roller, drive roller manufacturing method, and printing apparatus |
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|---|---|---|---|---|
| JPH08238787A (en) * | 1995-03-03 | 1996-09-17 | Toppan Printing Co Ltd | Image forming device |
| US20020057931A1 (en) * | 2000-11-13 | 2002-05-16 | Atsuteru Oikawa | Image forming apparatus including transfer belt having first and second image transfer surface planes arranged at an angle, and plural image bearing members facing same |
| JP2003228213A (en) * | 2002-02-05 | 2003-08-15 | Tokai Rubber Ind Ltd | Conductive roll |
| JP2004226491A (en) * | 2003-01-20 | 2004-08-12 | Kyocera Mita Corp | Transfer member advantageous in measuring toner density |
| US20040205967A1 (en) * | 2003-04-18 | 2004-10-21 | Barnes Johnathan Lee | Polyurethane coatings and drive rollers including the same |
| JP2016085268A (en) * | 2014-10-23 | 2016-05-19 | 信越ポリマー株式会社 | Conductive roller, developing apparatus, and image forming apparatus |
| CN105637033A (en) * | 2013-11-18 | 2016-06-01 | 住友橡胶工业株式会社 | Electroconductive elastomer composition and manufacturing method therefor |
| JP2017106964A (en) * | 2015-12-07 | 2017-06-15 | 株式会社リコー | Image forming apparatus |
-
2022
- 2022-02-10 CN CN202210125879.7A patent/CN114488731A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08238787A (en) * | 1995-03-03 | 1996-09-17 | Toppan Printing Co Ltd | Image forming device |
| US20020057931A1 (en) * | 2000-11-13 | 2002-05-16 | Atsuteru Oikawa | Image forming apparatus including transfer belt having first and second image transfer surface planes arranged at an angle, and plural image bearing members facing same |
| JP2003228213A (en) * | 2002-02-05 | 2003-08-15 | Tokai Rubber Ind Ltd | Conductive roll |
| JP2004226491A (en) * | 2003-01-20 | 2004-08-12 | Kyocera Mita Corp | Transfer member advantageous in measuring toner density |
| US20040205967A1 (en) * | 2003-04-18 | 2004-10-21 | Barnes Johnathan Lee | Polyurethane coatings and drive rollers including the same |
| CN105637033A (en) * | 2013-11-18 | 2016-06-01 | 住友橡胶工业株式会社 | Electroconductive elastomer composition and manufacturing method therefor |
| JP2016085268A (en) * | 2014-10-23 | 2016-05-19 | 信越ポリマー株式会社 | Conductive roller, developing apparatus, and image forming apparatus |
| JP2017106964A (en) * | 2015-12-07 | 2017-06-15 | 株式会社リコー | Image forming apparatus |
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