Centrifugal casting die, method for manufacturing thereof as well as casting material, blade obtained therefrom and method for manufacturing thereof

a centrifugal casting and die body technology, applied in the direction of superimposed coating process, instruments, applications, etc., can solve the problems of silicone rubber being liable to be torn and left on the inner surface, requiring an extremely large amount of man-hours for removal from the inner surface of the die body, and unable to achieve uniform circumferentiality, etc., to achieve easy replacement and easy replacement

US20080213421A1Inactive Publication Date: 2008-09-04CANON CHEMICALS INC
17 Cites 2 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2008-09-04
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A centrifugal casting die according to the present invention includes a cylindrical die body, a backup layer releasably bonded to the inner surface 12b of the die body, and a top layer bonded to be integral to the inner surface of the backup layer, for holding a centrifugally casting material supplied to the inner surface thereof, whereby the centrifugally casting material having a uniform thickness is easily releasable from the centrifugal casting die without using a die-lubricant.
Need to check novelty before this filing date? Find Prior Art

Description

[0001] This application claims priority from Japanese Patent Application Nos. 2002-136191 filed May 10, 2002, 2002-136190 filed May 10, 2002 and 2003-117441 filed Apr. 22, 2003, which are incorporated hereinto by reference.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to a centrifugal casting die for casting a thin-walled cylindrical resinous material and a method for manufacturing the casting die as well as the casting material by using the same, a blade used in an electrophotographic apparatus and a method for manufacturing the blade.

[0004] 2. Description of the Related Art

[0005] A schematic structure of a conventional electrophotographic apparatus is shown in FIG. 7, which carries out a contact-charging process and a contact-transfer process without using a corona discharge. That is, an electro-photosensitive drum 101 on which an electrostatic latent image is formed is provided with an electroconductive basic layer made, for example, o...

Examples

Embodiment Construction

[0056]Embodiments of the present invention will be described in detail with reference to FIGS. 1 to 6, in which a centrifugal casting die according to the present invention is applied to the casting of a centrifugally casting material for producing a cleaning blade of an electrophotographic apparatus shown in FIG. 7. It is noted, however, the present invention should not be limited to these embodiments but includes all modifications and changes contained in a concept of the present invention defined by the scope of claim for patent in this specification. Accordingly, the present invention is, of course, applicable to other technologies belonging to the spirit thereof; for example, a developer blade of the above-mentioned electrophotographic apparatus.

[0057]The appearance of a centrifugal casting die according to one embodiment of the present invention is schematically shown in FIG. 1, and a sectional view of a main portion thereof is shown in FIG. 2 in an enlarged manner. That is, a...