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Fixing member, manufacturing method of fixing member, rotational body of fixing member, fixing device, and image forming apparatus

A technology for rotating bodies and components, which can be applied to equipment, shafts and bearings using electrical recording technology using charge patterns, and electrical recording technology applying charge patterns, etc.

Inactive Publication Date: 2011-02-16
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second reason is that when the expansion rate increases, the walls of the fixing element become relatively thinner, so the strength decreases
[0007] Due to the above two reasons, it is difficult to develop a fixing device with low heat capacity (low density), high thermal conductivity, and heat resistance, which is repeatedly deformed in a high-temperature environment

Method used

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  • Fixing member, manufacturing method of fixing member, rotational body of fixing member, fixing device, and image forming apparatus
  • Fixing member, manufacturing method of fixing member, rotational body of fixing member, fixing device, and image forming apparatus
  • Fixing member, manufacturing method of fixing member, rotational body of fixing member, fixing device, and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A and comparative Embodiment A

[0031] In additive liquid silicon including hardener, powders of F-80ED and XN-100-15M (150 microns) were dispersed. XN-100-15M is pre-mixed with glycerin equivalent to one-eighth of the total amount. "MAZERUSTAR", manufactured by KURABO INDUSTRIES LTD, was used for the mixing operation. Use carbon fiber that has glycerin mixed in it - except for carbon fiber that has been heat-treated. The aforementioned carbon fibers are used to reduce adhesion within the silicone rubber. as in Figure 6A shows that this unvulcanized silicone rubber is injected as an injection material between the PFA tube and the mandrel with the rib corresponding to the reinforcement protrusion is set at 0.5mm inside the PFA tube, the The tube has an adhesive layer pre-formed on the inside. Figures 6B to 6D A cross-sectional view of the rib 31 is illustrated. The first vulcanization was performed by heating the fixing roller at 120° C., and the second vulcanization was performed by heating the fixing...

Embodiment B and comparative Embodiment B

[0039] Next, powders (150 microns) of F-30 and XN-100-15M were dispersed in additive liquid silicon including a hardener. This unvulcanized silicone rubber is injected as an injection material between the PFA tube and the mandrel with ribs set at 0.5 mm inside the PFA tube with the bond pre-formed inside Floor. The first vulcanization was performed by heating the fixing roller at 130° C. to make F-30 foam, followed by the second vulcanization by heating the fixing roller at 200° C. for 4 hours. Evaluation was performed in the same manner as in Practical Example A.

[0040] (table 3)

[0041]

[0042] In Practical Examples B-1, B-2 and B-3, the rubber hardness was low, and the compression set was also low. In addition, the start-up time of the fixing device is less than or equal to 30 seconds. As for Comparative Examples B-1 and B-3, the startup time was delayed, and in Comparative Example B-2, the compression set was very high, and the heating roller deformed after main...

Embodiment C

[0049] Practical Example C was produced by changing the thickness of the belt mandrel in the fixing member of Practical Example B-2.

[0050] (table 5)

[0051]

[0052] It was found that when the wall thickness of the mandrel is less than or equal to 0.5mm, the time required for the temperature of the fixing roller to rise to 160°C is less than or equal to 20 seconds, and when the thickness of the mandrel is less than or equal to 0.2mm, the fixing roller is broken .

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PUM

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Abstract

A fixing member is included on a fixing rotational body having a heat source built therein. The fixing rotational body is configured to fix unfixed toner onto a recording medium as the recording medium carrying the unfixed toner passes through a nip portion formed between the fixing rotational body and a pressurizing unit that comes into pressure contact with the fixing rotational body via the recording medium. The fixing member is made of silicon rubber including carbon fiber, wherein vacant spaces are formed in the silicon rubber.

Description

technical field [0001] The present invention relates to a fixing member, a manufacturing method of the fixing member, a rotating body of the fixing member, a fixing device and an image forming apparatus, and more particularly, to a thermally conductive, elastic fixing body included in a rotating body of fixing toner. Background technique [0002] Conventionally, in devices for outputting high-quality images, such as electrophotographic copiers, printers, specifically, in devices for outputting color electrophotographic images, silicone rubber is generally used as a material of a fixing member to be flexible and compact contact with the toner and obtain heat resistance. However, such a heat-resistant rubber material has low thermal conductivity, and thus acts as a heat-resistant layer when transferring heat from a heat source to a recording material. When producing color images, the use of a particularly soft rubber layer is important for improving image quality. However, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C13/00G03G15/20
CPCF16C13/00G03G15/2057Y10T156/10G03G2215/2003
Inventor 菅原智明
Owner RICOH KK