JPS6135241A - Manufacture of roller coated with fluoroplastic - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a method of manufacturing a fluororesin-coated roller, which is particularly suitable as a heat fixing roller for electronic copying machines, facsimile machines, and the like.

(Technical Background of the Invention and Problems Thereof) The most commonly used method for fixing toner images formed on paper sheets in electrostatic copying machines and the like is by using a heated fixing roller. This fixing method passes the paper on which the toner image has been formed between two rollers pressed together, and heats one or both of the rollers from within.
This is a method of fusing a toner image onto paper.

Normally, heat fixing rollers are manufactured by vacuum deaerating silicone rubber or the like to give the roller appropriate hardness, and then casting it into a cylindrical shape on the outside of a roll core made of primer-treated stainless steel, alumina, etc. Post-vulcanization is performed to form an elastic layer, and this surface is further treated with a primer, and then a non-adhesive substance such as fluororesin is coated with "C" by electrostatic coating or the like.
Furthermore, a method of baking this at a high temperature has been adopted.

In the above manufacturing method, as shown in FIG.
A metal primer Wj2, a rubber-like elastic layer 3, a layer of brimer 4, and a fluororesin layer 5 are sequentially coated on the outer periphery, and the outermost fluororesin layer is baked at 300 to 350°C for 1 to 2 hours after application. It is formed by For this reason, the edges of the metal primer, the rubber-like elastic layer, or the primer layer, which are in contact with a metal with good thermal conductivity, deteriorate and cause adhesive peeling. ) The present invention was made in view of the above circumstances, and its purpose is to provide a fluororesin-coated roller that has a long roll life and excellent long-term reliability by preventing the deterioration of the end portion during firing. The purpose is to provide a manufacturing method.

(Summary of the Invention) The method for producing a fluororesin coated M1a-la of the present invention is to provide a rubber-like elastic body on the outer periphery of a metal core that has been treated with a primer, and further apply fluorine thread A1 resin on the outer periphery. In the method of manufacturing a fluororesin-coated roller by baking at a high temperature, the baking of the fluororesin leaves the end surface between the fluororesin layer and the mandrel coated with a protective member having low thermal conductivity. It is characterized by being made in

In the present invention, silicone rubber or other materials having heat resistance and appropriate hardness are used as the rubber-like elastic body.

Further, as the fluororesin, a fluororesin or a mixture of fluororubber and fluororesin is used.

Furthermore, examples of protective members with low thermal conductivity include single bodies, molded products, and laminates made of heat-resistant rubbers such as fluororubber and silicone rubber, fluororesin, polyimide molded products, amide-imide, or novolac fibers.

This protective member with low thermal conductivity is coated on the end surface between the fluororesin layer and the mandrel, and baking of the fluororesin prevents the end surface from deteriorating due to the heat of time.

(Practical implementation of the invention) An embodiment of the present invention will be described below with reference to the drawings.

The fluororesin-coated roller shown in Fig. 2 is manufactured by applying a metal primer to the outer periphery of the core metal 1 made of aluminum 5056, for example, to improve the adhesion between the metal and the rubber-like elastic layer. 2, and on the outer periphery, for example, silicone rubber (trade name 'I'3E manufactured by Shin-Etsu Chemical Co., Ltd.) is provided.
270-6μ) by a casting method or injection molding method to provide a rubber-like elastic body #3, and then coated with a mixture of fluororubber and fluororesin (Daiel GL8213, product name manufactured by Daikin Industries, Ltd.) via a primer [4]. ) was applied and baked.

Before baking the mixture of fluororubber and fluororesin, the end surface between the fluorine-based resin and the mandrel (only one end is shown)
A protective member 6 of low heat conductivity, such as polyimide resin, is provided.

Furthermore, when the above roller is commercially available as a fixing roller, the number of copies per copy before offset or paper wrapping occurs is 1.
It was 50,000 pieces.

(Effects of the Invention) According to the method of manufacturing a fluorine/i% resin-coated roller of the present invention, by covering the roller end with a protective member having low thermal conductivity during baking, peeling of the end does not occur. Good quality copies can be obtained for a long time.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of a conventional fluororesin-coated roller, and FIG. 2 shows an embodiment of the heat fixing roller of the present invention. 1 ---1----- Core metal

Claims (1)

[Claims] 1. A rubber-like elastic body is provided around the outer periphery of the primer-treated metal core, and a fluororesin is further applied to the outer periphery.
In a method of manufacturing a fluororesin-coated roller by baking the fluororesin at a high temperature, the fluororesin is baked so that the end surface between the fluororesin layer and the mandrel is coated with a protective member having low thermal conductivity. 1. A method for manufacturing a fluororesin-coated roller, characterized in that the method is performed in a state where the roller is coated with a fluororesin.