JPH0474636A - Manufacture of carrier roller - Google Patents

Abstract

PURPOSE:To obtain easily a roller which is obtained by performing complicated processing to a polymeric resin layer, by a method wherein the title manufacture is constituted of the first process heating a member formed of a rigid body having unevenness and the second process where the roller the surface of which is coated with a polymeric material is brought into contact with the member and the unevenness is formed on a roller surface. CONSTITUTION:A metal such as free cutting steel is molded, into an appropriate shape of such an extent that the diameter is 20-25mm and a length is 230mm and made into a core member 5. Either a polymeric resin layer is formed by driving polymeric resin 2 molded into a cylindrical state into the core member or a coat surface 6 of the polymeric resin is formed on the core member with a spray coating machine 7. After formation of the polymeric resin layer, the surface layer is processed so that the outside diameter becomes 25.4mm. Then a metallic plate 8 possessing an uneven form which is desirous to form on a carrier roller surface is heated by a heating device 9 such as a heater. Surface resin of the carrier roller 10 is half-melted and the shape of a metallic plate 8 is transferred by turning the carrier roller 10, on which the resin layer is formed, while bringing the same into contact with the surface of the metallic plate 8.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method of manufacturing a roller.

[Prior Art] In recent years, as a color copying machine, microcapsule paper is exposed to light through an original, and the exposed microcapsule paper and color developer paper coated with a color developer are pressed together. A type of paper has appeared in which a microcapsule paper and a color developer paper are reacted to obtain a color image on the color developer paper.

However, since such color developer paper is not versatile and is difficult to obtain, an apparatus has been devised that applies a color developer to a support such as plain paper.

Such devices require a developer-carrying roller that carries particulate color developer, and in order to increase the amount of powder supported and improve mold release properties, the surface is coated with a polymer. Carrier rollers covered with material and textured are emerging. There are methods for manufacturing such a supporting roller as shown below.

The method will be explained using FIGS. 2(a) to 2(C).

As shown in Fig. 2 (a), the core member 1 is formed by forming metal such as aluminum or free-cutting steel into a suitable shape with a diameter of 20 mm and a length of about 230 mm, and then a cylindrical shape with an outer diameter of 26 mm and an inner diameter of about 20 mm. A molded polymer resin 2 such as nylon or Teflon is injected (FIG. 2(b)). After that, the resin surface is smoothed down to an outer diameter of 25.4 mm, and finally, a cutting machine 4 is used to form irregularities 3 such as grooves (see Fig. 2 (C).
)).

[Problems to be Solved by the Invention] However, with such a method, it was not possible to perform complicated processing on the surface.

Furthermore, each piece had to be cut one by one, which was time-consuming and costly.

The present invention has been made in order to solve the above-mentioned problems, and is to easily manufacture a roller whose polymer resin layer is subjected to complicated processing.

[Means for Solving the Problems] In order to achieve this object, the method for manufacturing a roller of the present invention includes a first step of heating a member formed of a rigid body having unevenness, and a step of heating a member formed of a rigid body having at least a surface thereof. The second step consists of bringing the roller covered with the above-mentioned member into contact with each other to form irregularities on the surface of the roller.

[Operations] According to the present invention having the above configuration, it is possible to easily manufacture a roller whose polymer resin layer is subjected to complicated processing.

[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

FIGS. 1(a) to 1(C) are steps showing an embodiment of the present invention.

Similarly to FIG. 2(a), metal such as aluminum or free-cutting steel is formed into a suitable shape with a diameter of 20 mm or 25 mm and a length of about 230 mm to form the core member 5 (FIG. 1(a)).
Next, as shown in FIG. 1(b), on the core member 5 with a diameter of 20 mm,
A polymer resin layer is formed by injecting a polymer resin 2 formed into a cylindrical shape, or a coating surface 6 of polymer resin is applied to the core member 5 using a thermal spraying machine 7 as shown in FIG. 1(C). Let it form. In addition, when coating a resin layer by thermal spraying, since the coating layer is as thin as several tens to several hundred microns, it is necessary to use a thick core member 5 with a diameter of about 25 mm.

After the polymer resin layer is formed, the surface is processed so that the outer diameter is 25.4 mm (not shown). Then, as shown in FIG. 1(d), a metal plate 8 having an uneven shape that is desired to be formed on the surface of the carrier roller is heated by heating means 9 such as a heater, and a resin layer is formed on the surface of the metal plate 8. By rotating the carrying roller 10 while making contact, the surface resin of the carrying roller 10 is semi-melted and the shape of the metal plate 8 is transferred. The heating temperature of the metal plate 8 is 300°C for tetrafluoroethylene and 2°C for 6-nylon.
For 6.6-nylon, the temperature is preferably about 250°C. As described above, since the shape of the metal plate 8 is reflected on the carrier roller 10, by processing the unevenness that is desired to be formed on the carrier roller 10 on the metal plate 8, it is possible to easily form the unevenness on any number of carrier rollers 10. I can do it. Furthermore, compared to resin, metal is easier to process in complex ways, and by moving the metal plate 8 back and forth several times, it is also possible to form more dense irregularities.

It should be noted that the developer coating device of the present invention described above is not limited to this embodiment, and may be modified without departing from the spirit thereof. For example, in this embodiment, a method for manufacturing a carrying roller is shown, but it does not have to be a carrying roller; for example, a roller such as a paper feeding or conveying roller can also be used. However, in that case, it is preferable to change the material of the roller and the shape of the unevenness depending on the application.

[Effects of the Invention] As is clear from the above detailed description, according to the present invention, it is possible to easily manufacture a carrier roller in which a polymer resin layer is subjected to complicated processing.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment embodying the present invention, and FIG. 1 is an explanatory diagram showing a method of manufacturing a carrying roller of the present invention. FIG. 2 is an explanatory diagram showing a conventional method of manufacturing a carrier roller. In the figure 2... Cylindrical polymer resin 6... Polymer resin coated surface 8... Metal plate 10... Carrying roller

Claims (1)

[Claims] 1. A first method for heating a member formed of a rigid body having unevenness.
and a second step of bringing the member into contact with a roller whose surface is at least covered with a polymeric material to form irregularities on the surface of the roller.