KR100946294B1 - Roller for fusing unit and manufacturing method the same - Google Patents

Abstract

The present invention relates to a fixing roller and a method of manufacturing the same, the fixing is provided with a reinforcing portion 14 for reinforcing the rigidity of the tube 10 on the inner circumferential surface of the tube 10, the inside of which is empty and both end surfaces penetrated. In the secondary roller, the reinforcing portion 14 is formed along the axial direction of the inner circumferential surface of the tubular body 10, and a plurality of reinforcement parts are provided at predetermined intervals along the circumferential direction of the tubular body 10, and further along the entire circumferential direction. It is characterized in that the additional reinforcing ribs 16 are formed and arranged in a plurality spaced apart at regular intervals in the longitudinal direction. Therefore, the rigidity reinforcement of the axial pressing force of the fixing unit roller as well as the rigidity reinforcement of the axial bending direction are simultaneously performed, thereby improving the rigidity of the product and improving the durability and deterioration of the quality due to deformation, thereby increasing the reliability of the product. It is possible to improve the overall product competitiveness, such as the cross-reinforcement method of additional reinforcement ribs and reinforcement parts, or by forming the reinforcement parts on the inner circumferential surface alone, the cross-sectional area of the reinforcement and reinforcement parts located on the thinner and inner circumferential surfaces Increasing the thermal conductivity by the increase, so that the overall product competitiveness can be improved, such as reducing the standby and power consumption due to the quick start.

Fuser roller and manufacturing method thereof, pipe, additional reinforcing rib, reinforcing part, swaging

Description

Roller for fusing unit and manufacturing method

The present invention relates to a fixing roller and a method of manufacturing the same, and more particularly, by providing a rigid reinforcement to the shaft bending direction as well as a rigid reinforcement to the axial pressing force of the fixing unit roller, the rigidity of the product is excellent and the durability is It is improved and there is no deterioration of quality due to deformation, which increases the reliability of the product. In addition, by applying a cross reinforcement method of additional reinforcing ribs and reinforcing parts or forming reinforcing parts on the inner circumferential surface alone, thermal conductivity due to thinning and increasing the cross-sectional area of the reinforcing parts and reinforcing parts located on the inner circumferential surface (Thermal) The present invention relates to a fixing roller and a method of manufacturing the same so that the overall product competitiveness can be improved, such as a decrease in standby power consumption due to a quick start due to an increase in conducation rate.

In general, an image forming apparatus refers to an apparatus for printing an image corresponding to input original image data onto a recording medium such as printing paper.

Examples of such an image forming apparatus include a printer, a copying machine, a facsimile, and the like. In the image forming apparatus, an electrophotographic method is applied to an image forming apparatus such as a laser beam printer, an LED print head printer, and a facsimile. It is adopted.

An image forming apparatus employing an electrophotographic method has a charging process of charging a photosensitive drum with a charging roller to form a uniform charge on the photosensitive drum, and a laser scanning unit (LSU) on the charged photosensitive drum. The exposure process of scanning the light through an electrostatic latent image to form an electrostatic latent image, the developing process of developing an electrostatic latent image formed on the surface of the photosensitive drum with a developer, and recording the visible image formed on the photosensitive drum through a transfer roller. A printing operation is performed through a transfer process for transferring paper and a fixing process in which a developer transferred to a recording paper is heated and pressurized with a predetermined heat and pressure to be fused onto the recording paper.

In the fixing process, the fixing roller has a two-roll fixing method using a pressurizing roller, a heat-roller, a roller-pressure fixing roller, and a fixing roller. 3Roll fixing method using heat, face pressure roller, etc. is generally applied, and the use and quantity of the fixing roller can be variously changed according to the designer's intention.

The reinforcing part formed on the inner circumferential surface of the tube of the fixing unit roller is a rib structure formed along the axial direction of the tube, and a plurality of reinforcing parts are provided along the longitudinal direction of the tube. Ingot)-> Melting-> Metal treatment-> Casting-> Homogeneous treatment-> blliet-> Extrusion-> Drawing-> Stretching-> Heat treatment It is completed through the process of heat treatment and flame planting, and the reinforcement part formed on the inner circumferential surface of the pipe by changing the extrusion die and draw plug structure in the extrusion process and the drawing process is a reinforcement part of various shapes. Can be transformed and produced.

In addition, the reinforcing portion is formed on the inner circumferential surface of the tube by changing the extrusion die and nozzle structure during extrusion and drawing process, but the inner circumferential surface to compensate for the problem that the strength (density) of the reinforcing portion due to flowability decreases depending on the shape of the inner circumferential surface reinforcing portion. The shape of the outer circumferential surface was added and extruded in the same manner as the shape of the reinforcing part to make up for the above-mentioned problem of strength reduction.

Subsequently, the fixing roller processing method is a multi-stage diameter tubular shape or a straight working method formed by applying both ends of a large diameter cylindrical pipe by a swaging method to a small diameter or a friction welding method of welding a large diameter and a small diameter to each other. (Meanwhile, swaging, which is an example of the processing method, is a type of forging work that compresses and forms a metal material, and cuts a material cut from a metal plate almost the same thickness as the thickest part of the product. It is a work that uses a tool or a mold to crush a part of the material and flows the material in the shape of a sculpted shape. It is usually divided into rotary swaging and radial forging, which is a round rod or a cylindrical tube. A piece of material with a tool while rotating the shape material around its axis It refers to the process of increasing the length by squeezing or reducing the diameter by crushing in the direction perpendicular to the axis.) After finishing (surface) smoothing the outer surface and finishing the remaining post-process (U-cut, hole), surface area increase and heat reflectivity In order to reduce heat and increase heat absorption rate, after pretreatment process such as heat-resistant coating (light energy-> absorption-> heat energy) and sandblaster (adhesion strength improvement) if necessary, PTFE (Polytetrafluoroethylene), FEP (Fluorinated Ethylene Propylene Copolymer) Fusing Roller-heat coated with Teflon, such as any one of PFA (Perfluoroalkoxy) and ETFE (Ethylene + Tetrafluoroethylene), or a combination thereof. As a fusing pressure-roller to apply and inject liquid silicone rubber (LSR) along with materials such as primer and Teflon tube on the outer surface Fusing Pace-pressure-roller, which is applied with silicon and coated with Injcetion, Teflon & Ceramics, is completed according to the fixing method.

On the other hand, the fixing unit rollers are generally coated with pressurized rollers (Pressure-Roller) applied with silicon coating and injection method, and coated coated rollers such as Teflon and Ceramic, and applied with silicon according to the fixing method. In general, Pef-pressure-roller with Teflon & Ceramic coating is applied, and the use and quantity of fixing roller can be variously changed according to the designer's intention. Thus, the principle and effect of the present invention are applied equally, so that the present invention is referred to as " fixed part roller " (fixed pressurizing roller and fixing heating roller, fixing auxiliary roller, etc.) including the rollers generally applied to the image forming apparatus. Applied in a comprehensive category.

However, since the conventional reinforcement ribs are formed in the circumferential direction only in the circumferential direction, they are spaced apart by a predetermined interval, so that only the stiffness of the axial pressing force on the corresponding area where the additional reinforcement ribs are formed is reinforced. Not only does it have a weakness against the axial force on the part where the reinforcing rib is not formed, but the reinforcing roller is not properly reinforced in the axial bending direction with respect to the fixing roller, that is, the direction where both ends are bent relative to the center of the shaft. There existed a problem that it might bend in the axial bending direction at the time of fixing press work.

The present invention has been made to solve such a problem, by making the rigidity reinforcement to the axial bending direction as well as the stiffness reinforcement to the axial pressing force of the fixing unit roller at the same time, the stiffness of the product is excellent to improve the durability and due to deformation It is an object of the present invention to provide a fixing roller and a method of manufacturing the same in which there is no deterioration and thus the reliability of the product is increased.

In addition, by applying a cross reinforcement method of additional reinforcing ribs and reinforcing parts or by forming reinforcing parts alone on the inner circumferential surface, thermal conductivity due to thinning and increasing the cross-sectional area of the reinforcing parts and reinforcing parts located on the inner circumferential surface (Thermal) Another object of the present invention is to provide a fixing roller and a method of manufacturing the same, in which the overall product competitiveness can be improved, such as a decrease in standby power consumption due to a faster quick start due to an increase in conducation rate.

In the fixing unit roller of the present invention for achieving the above object is a fixing unit roller having a reinforcing part for reinforcing the rigidity of the tube body on the inner peripheral surface of the tube body is hollow and both cross-sections, the reinforcement portion of the tube body It is formed along the axial direction of the inner circumferential surface, characterized in that a plurality is provided at a predetermined interval along the circumferential direction of the tube.

In addition, in the fixing unit roller according to the present invention, the inner circumferential surface of the tubular body is formed protruding along the entire circumferential direction is orthogonal to the reinforcement and spaced apart at regular intervals in the longitudinal direction, respectively, a plurality of additional reinforcing ribs are further provided It is preferable.

Further, in the fixing unit roller according to the present invention, it is preferable that the reinforcing portion has a straight rib structure formed over the entire axial direction of the tube.

In addition, in the fixing unit roller according to the present invention, the reinforcement portion is preferably arranged at positions perpendicular to each other reinforcement portions adjacent to each other on the basis of the central axis at equal intervals in the front, rear, left and right of the inside of the tube.

Further, in the fixing unit roller according to the present invention, it is preferable that the reinforcing portion has a rectangular cross section.

Further, in the fixing unit roller according to the present invention, it is preferable that the reinforcing portion has a semicircular shape whose cross section is curved.

In addition, in the fixing unit roller according to the present invention, it is preferable that the reinforcing portion has a rectangular shape in which the corners are rounded at each corner.

In the fixing unit roller according to the present invention, it is preferable that the reinforcing portion has a triangular cross section.

Further, in the fixing unit roller according to the present invention, it is preferable that the reinforcing portion has a trapezoidal cross section.

In addition, in the fixing unit roller according to the present invention, the reinforcing portion is preferably a structure that protrudes integrally from the inner peripheral surface of the tube during extrusion of the tube.

In addition, in the fixing roller according to the present invention, it is preferable that the additional reinforcing ribs protruding in the screw structure along the axial direction on the inner peripheral surface of the tubular body is further provided.

In addition, the fixing unit roller manufacturing method of the present invention comprises the steps of forming a reinforcing portion having a horizontal rib shape in the process of extruding or drawing the tube; Pressing the outer circumferential surface of the tube in a right angle direction through a swaging process to form a plurality of additional reinforcing ribs orthogonal to the reinforcement on the inner circumferential surface of the tube at regular intervals at equal intervals in the longitudinal direction; Making both ends of the tubular body a small diameter structure through a swaging process; And smoothing the outer surface of the tubular body by performing a finishing thinning process to remove the concave groove formed concave on the outer surface during the swaging process for forming the additional reinforcing ribs.

As described above, the fixing unit roller and the manufacturing method of the present invention, as well as the rigid reinforcement of the axial pressing force of the fixing unit roller as well as the stiffness reinforcement in the axial bending direction at the same time, the rigidity of the product is excellent and the durability is improved And there is no deterioration of quality due to deformation, and thus the product becomes more reliable.

In addition, by applying additional reinforcement ribs and cross-reinforcement method of reinforcement part or by forming reinforcement part on the inner circumferential surface alone, the thermal conductivity by thinning and increasing the cross-sectional area of reinforcement part and reinforcement part located on inner circumferential surface (Thermal) Increasing the conducation rate has the effect of improving the overall competitiveness of the product, such as the reduction of standby and power consumption due to the quick start.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

As shown in Figures 1a to 7, the fixing roller according to an embodiment of the present invention is a reinforcement for reinforcing the rigidity of the tube 10 on the inner circumferential surface of the tube body 10 is hollow and both cross-sections are perforated The structure 14 is provided.

In addition, the plurality of reinforcement ribs 16 are formed along the entire circumferential direction and spaced apart at regular intervals in the longitudinal direction to further reinforce the reinforcing portion 14.

Here, the reinforcing portion 14 is provided along the axial direction of the tubular body 10 which is provided on the inner circumferential surface of the tubular body 10 and crosses the additional reinforcing rib 16.

More specifically, the reinforcing portion 14 is a structure that protrudes integrally from the inner circumferential surface of the tubular body 10 when the tubular body 10 is extruded, in particular a straight protrusion structure formed over the entire axial direction of the tubular body 10. It is.

In addition, the reinforcing parts 14 are crossed at right angles to the additional reinforcing ribs 16 of the tubular body 10, and a plurality of reinforcing parts are formed at predetermined intervals along the circumferential direction.

That is, the reinforcement part 14 is preferably disposed at positions perpendicular to each other reinforcing parts 14 adjacent to each other on the basis of the central axis 10a at equal intervals in the front, rear, left, and right sides of the inside of the tubular body 10. .

Reference numeral 20 denotes a collet for rotating the tubular body 10 for the swaging process, 30 denotes a dustproof roller for preventing vibration from occurring during the rotation of the tubular body 10, and 40 and 50 Each shows a swaging roller, and 60 shows a finishing machine.

  8 to 15 show modifications of the shape and number of the reinforcing portions 14, the cross section of which is a square 14, a semicircle 141, each corner is rounded square (142), triangular ( 143) and the trapezoid 144 may be variously modified, and the number may also be varied in various ways along the circumferential direction.

On the other hand, as another embodiment of the present invention, as shown in Figure 16, the additional reinforcing rib 17 is formed in a shape protruding in a screw structure for the entire axial direction for further reinforcing the rigidity of the reinforcing portion 14 You could do it.

Looking at the manufacturing method of the fixing unit roller according to an embodiment of the present invention according to this configuration, in the process of extruding the tubular body 10 to form a reinforcing portion 14 having a horizontal rib shape.

Here, the general example of the extrusion process of the reinforcing part 14 is ingot (ot)-> melting (melting)-> metal treatment-> casting (casting)-> homogeneous treatment-> extrusion (extrusion)- > Drawing-> stretching-> heat treatment and heat treatment (flame planting) is completed, and the reinforcement part 14 is also changed by changing the extrusion die structure during the extrusion process. It can be modified and produced in various ways.

In addition, in the extrusion and drawing process, the reinforcement is formed on the inner circumferential surface of the tubular body by changing the extrusion die and nozzle structure, but the inner circumferential surface to compensate for the problem that the strength (density) of the reinforcement due to flowability is lowered according to the shape of the inner circumferential surface reinforcement. The shape of the outer circumferential surface in the same manner as the shape of the reinforcing part may be supplemented by extrusion drawing to compensate for the problem of the decrease in strength.

Then, after continuing through the process of swaging to make both ends of the tubular body 10 in a small diameter structure, and finishing to remove the concave groove 10b formed concave on the outer surface during the swaging process for forming the orthogonal ribs The thin surface is made to be smooth while the thickness of the outer surface of the tubular body 10 is thinned.

 Then, after completion of the remaining post-process (U-CUT), heat-resistant coating (light energy-> absorption-> heat energy), SANDBLASTER (adhesion strength improvement) as needed to reduce surface area increase and heat reflectance and increase heat absorption. Coated with Teflon material such as PTFE (Polytetrafluoroethylene), FEP (Fluorinated Ethylene Propylene Copolymer), PFA (Perfluoroalkoxy), ETFE (Ethylene + Tetrafluoroethylene), or a combination thereof The fusing roller-heat is completed, and in another embodiment, a continuous silicone rubber (LSR) is applied to the outer surface together with a material such as a primer and a Teflon tube. Fusing pressure rollers are applied and injected, and fusing p rollers are treated with silicon coating and injection, Teflon and ceramic coating according to the fixing method. an ace-pressure-roller is completed.

On the other hand, as another embodiment of the present invention, in the process of extruding the tubular body 10 to form a reinforcing portion 14 of the horizontal rib shape first.

Then, in the swaging process, the outer circumferential surface of the tubular body 10 is pressed at right angles so that the additional reinforcing ribs 16 having orthogonal rib shapes to the inner circumferential surface of the tubular body 10 are spaced at regular intervals at equal intervals in the longitudinal direction, respectively. By forming a plurality, the cross (orthogonal) shape of the reinforcement part 14 which is a horizontal rib of this invention, and the additional reinforcement rib 16 which is orthogonal rib is completed.

Alternatively, as another embodiment of the present invention, as shown in Figure 16, in order to ensure that the additional reinforcing rib 17 is formed in a screw structure with respect to the entire axial direction of the tube 10, the tube in the swaging process The outer circumferential surface of (10) may be pressed in an oblique direction to complete the additional reinforcing ribs 17 on the inner circumferential surface of the tubular body 10 in a screw shape.

Then, after continuing through the process of swaging to make both ends of the tubular body 10 in a small diameter structure to remove the concave groove 10b formed concave on the outer surface during the swaging process for forming the orthogonal ribs. Finishing thinning is performed so that the thickness of the outer surface of the tubular body 10 becomes thin and smooth.

 Then, after completion of the remaining post-process (U-CUT), heat-resistant coating (light energy-> absorption-> heat energy), SANDBLASTER (adhesion strength improvement) as needed to reduce surface area increase and heat reflectance and increase heat absorption. Coated with Teflon material such as PTFE (Polytetrafluoroethylene), FEP (Fluorinated Ethylene Propylene Copolymer), PFA (Perfluoroalkoxy), ETFE (Ethylene + Tetrafluoroethylene), or a combination thereof The finished fusing roller-heat is completed, and in another embodiment, a continuous silicone rubber (LSR) is applied to the outer surface together with a material such as a primer and a Teflon tube. Fusing pressure rollers are applied and injected, and fusing pas are treated with silicone coating and injection, Teflon and ceramic coating according to the fixing method. The ce-pressure-roller is completed.

Strength reinforcement of the fixing unit roller according to the present invention described above is not limited to the above embodiment, and having ordinary knowledge in the field to which the present invention belongs without departing from the gist of the present invention as claimed in the following claims. Anyone who grows has the technical spirit to the extent that anyone can make various changes.

Figure 1a is a partial cutaway perspective view showing a fixing unit roller according to an embodiment of the present invention.

1B is a partial cutaway perspective view showing a fixing unit roller according to another embodiment of the present invention.

2 to 7 are schematic cross-sectional views sequentially showing a process of manufacturing the fixing unit roller according to an embodiment of the present invention.

8 to 15 are schematic cross-sectional views showing modifications of the shape and the number of reinforcement parts of FIG. 2.

16 is a partially cutaway perspective view of a fixing unit roller according to another embodiment of the present invention.

** Description of the symbols for the main parts of the drawings **

10: tube 10a: central axis

10b: concave groove 14: reinforcement

16, 17: additional reinforcement rib 20: collet

30: anti-vibration roller 40,50: swaging roller

60: finishing machine

Claims (12)

In the fixing unit roller provided with a reinforcing portion 14 for reinforcing the rigidity of the tube body 10 on the inner peripheral surface of the tube body 10, the inside of which is empty and through both ends, The reinforcing portion 14 is formed along the axial direction of the inner circumferential surface of the tubular body 10, and a plurality of reinforcement parts are provided to form a predetermined interval along the circumferential direction of the tubular body 10, along the axial direction on the inner circumferential surface of the tubular body 10. Fixing unit roller, characterized in that the additional reinforcing ribs 17 protruding in a screw structure is provided. The method of claim 1, The inner circumferential surface of the tubular body 10 is formed to protrude along the entire circumferential direction and is further provided with a plurality of additional reinforcing ribs 16 orthogonal to the reinforcing portion 14 and spaced apart at regular intervals in the longitudinal direction. Fixing unit roller. The method of claim 1, The reinforcing part 14 is a fixing unit roller, characterized in that the straight rib structure formed over the entire axial direction of the tubular body (10). The method of claim 3, The reinforcement part 14 is fixed, characterized in that arranged in a position perpendicular to each other reinforcing parts 14 adjacent to each other on the basis of the central axis (10a) at equal intervals in the front, rear, left and right inside the tubular body 10, respectively. Blowing roller. The method of claim 4, wherein The reinforcing part 14 is a fixing unit roller, characterized in that the cross-section is rectangular. The method of claim 4, wherein The reinforcing part 14 is a fixing unit roller, characterized in that the cross-section is curved in a semicircle shape. The method of claim 4, wherein The reinforcing part 14 is a fixing unit roller, characterized in that the cross-section is a square shape rounded each corner is curved. The method of claim 4, wherein The reinforcing part 14 is a fixing unit roller, characterized in that the cross section is triangular shape. The method of claim 4, wherein The reinforcing portion 14 is a fixing unit roller, characterized in that the cross-section is trapezoidal shape. The method of claim 4, wherein The reinforcing part 14 is a fixing unit roller, characterized in that the structure protrudes integrally from the inner circumferential surface of the tubular body (10) during extrusion of the tubular body (10). delete Forming a reinforcement part 14 having a horizontal rib shape in the process of extruding or drawing the tube body 10; Press the outer circumferential surface of the tubular body 10 in a right angle direction through a swaging process so that the additional reinforcing ribs 16 orthogonal to the reinforcing portion 14 on the inner circumferential surface of the tubular body 10 are spaced at regular intervals in the longitudinal direction, respectively. To form a plurality; Making both ends of the tubular body 10 in a small diameter structure through a swaging process; And Smoothing the outer surface of the tubular body 10 by performing a finishing thinning process for removing the concave groove part 10b recessed in the outer surface during the swaging process for forming the additional reinforcing rib 16; Fixing unit roller manufacturing method comprising a.

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