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Developing blade and its manufacturing method

一种制造方法、叶片的技术，应用在显影叶片及其制造领域，能够解决显影叶片受损、叶片构件74成型困难、显影叶片功能表现受损等问题

Active Publication Date: 2009-04-22
FUJIKURA COMPOSITES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the conventional developing blade, since the blade member 74 is molded on a single surface of the support member 72, there is a problem that the difference in thermal shrinkage between the support member 72 and the blade member 74 causes the support member 72 to deflect toward the blade member. 74 deformed on one side and warped
However, when the thickness or width of the supporting member 72 is increased, the spring action of the supporting member 72 will decrease, and the function performance of the developing blades in the developing device may be damaged, or the miniaturization of the developing device may be affected. , there is also the problem of increased manufacturing costs
In addition, when reducing the width of the blade member 74, there is a problem that the molding of the blade member 74 becomes difficult, or the functional performance of the developing blade in the developing device is impaired.

Method used

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  • Developing blade and its manufacturing method
  • Developing blade and its manufacturing method
  • Developing blade and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] A SUS301 plate with a thickness of 0.1 mm, a width of 18 mm, and a length of 240 mm was prepared as a supporting member. The support member uses a modulus of elasticity of 1.9×10 4 kg / mm 2 , Sectional moment of inertia (Iz) is 1.5E-03 material. In addition, the modulus of elasticity of the supporting member was measured using the metal material tensile test method JIS Z2241 method. In addition, the section moment of inertia (Iz) can be calculated from the cross-sectional shape of the supporting member. Since the cross-sectional shape is a rectangle, the above formula 4(bh 3 / 12) calculation. The result is Iz=18×0.1 3 / 12=1.5E-03.

[0083] Next, six kinds of mixtures of liquid silicone rubber and curing agent (mixtures A to F) were prepared. Next, use each mixture, and use Figure 7 , Figure 8 Six types of developing blades (samples 1 to 6) were produced using the injection molding die shown and the above-mentioned supporting member. The 25% modulus of the blad...

Embodiment 2

[0093] The same SUS301 plate as in Example 1 was prepared as a supporting member.

[0094] Next, prepare NBR and FKM (LT303 manufactured by Daikin Industries, Ltd.), silicone rubber (X34-1595-B manufactured by Shin-Etsu Chemical Co., Ltd.) Blade members were formed, and developing blades (sample 7, sample 8) were manufactured respectively. The 25% modulus of the blade members constituting these developing blades was measured in the same manner as in Example 1. As a result, it was found that the developing blade (sample 7) using NBR was 0.7 MPa, while the developing blade using FKM and silicone rubber was 0.7 MPa. (Sample 8) was 0.5 MPa. In addition, the section moment of inertia (Iz) of the blade member was 7E-01 in both samples 7 and 8.

[0095]In the same manner as in Example 1, the amount of warpage of each of the developing blades produced in the above-mentioned manner was measured. As a result, it was found that the amount of warpage of the developing blade (sample 7) u...

Embodiment 3

[0097] The same SUS301 plate as in Example 1 was prepared as a supporting member.

[0098] Next, the same mixture B of liquid silicone rubber and curing agent as used in Example 1 was prepared. Next, five types of developing blades (Samples 9 to 13) having different cross-sectional moments of inertia of the blade members were produced by the same injection molding as in Example 1, except using injection molding dies with different cavity volumes in the upper mold. . The sectional moments of inertia of blade members constituting the five types of developing blades (samples 9 to 13) produced in this way are shown in Table 2 below. In addition, the 25% modulus of the blade member constituting each developing blade was 0.6 MPa.

[0099] The amount of warpage of five types of developing blades (samples 9 to 13) produced as above was measured by the same method as in Example 1, and the results are shown in Table 2 below.

[0100] Table 2

[0101]

[0102] As shown in Table 2,...

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PUM

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Abstract

A developing blade (1) includes a support member (2) having an elastic coefficient in a range from 0.5*10<4> to 4.0*10<4> kg / mm<2> and a cross-sectional secondary moment (Iz) in a range from 6.5E -04 to 1.2E-02; and a blade member (4) arranged on one side along one end side unit (2A) of the support member (2). The blade member (4) is formed by rubber material having 25% modulus which is not greater than 0.85 MPa, the cross-sectional secondary moment (Iz) in a range from 8E-02 to 1.2E+01, and a warp in the longitudinal direction of the blade member (4) not greater than 10 mm.

Description

technical field [0001] The present invention relates to a developing blade and a manufacturing method thereof, in particular to a developing blade used in a developing device of an electrophotographic image forming apparatus such as a laser printer, a copier, and a facsimile machine, and a manufacturing method thereof. Background technique [0002] An image forming apparatus using an electrophotographic image forming process includes a developing device for developing a latent image on a photosensitive drum. For example, the developing device is known as a Figure 12 The shown developing device 61 has a structure including a funnel 62, a developing roller 63, a rotatable stirring plate 64, and a developing blade 65 (Japanese Patent Application Publication No. 2003-43812). In this developing device 61 , the developer 66 in the hopper 62 is supplied to the developing roller 63 by the stirring plate 64 , and the developer is uniformly supported on the peripheral surface of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/0812G03G2215/0634
Inventor 中村洋山内选安部浩二关根胜彦坪井顺治相马伸次
Owner FUJIKURA COMPOSITES INC
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