JPH0512203Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a guide roller used to guide paper, plastic film, etc. printed by a printing machine when they are wound up.

(Prior Art) A base material A such as paper or plastic printed by a printing machine is guided by a guide roller B and wound onto a winding drum (not shown) as shown in FIG.

Conventionally, the guide roller B used was a metal roller made of iron, aluminum, etc. whose surface was directly plated with hard chrome.

However, with this guide roller B, the ink printed on the base material A adheres, and the ink is transferred to the base material A.
Therefore, when the guide roller B becomes dirty, the operation of the printing press must be stopped and the guide roller B must be cleaned, resulting in extremely poor workability.

Conventionally, in order to prevent ink from adhering to the guide roller B, a guide roller F was used in which the surface D of a metal roller C was coated with Teflon E as shown in FIG.

(Problem to be solved by the invention) However, in the guide roller F shown in Fig. 4, since the surface D of the metal roller C is smooth, the Teflon E does not stick well to the surface D, and the Teflon E easily peels off. There was a drawback.

Also, when Teflon E wears out, metal roller C
Another drawback was that the base material A was easily cut because the surface D of the base material A was exposed.

(Purpose of the invention) The purpose of the invention is to prevent the printed ink from adhering to the base material, to prevent the guide roller and the base material from getting dirty, to prevent Teflon from being worn out, and to prevent the base material A from being cut even if the Ftelon is worn out. Our goal is to provide rollers.

(Means for Solving the Problems) The guide roller of the present invention is produced by thermally spraying ceramic 3 on the surface 2 of a metal roller 1 and processing the surface 2 into an uneven surface, as shown in Fig. 1a. The surface 2 is coated with Teflon 4 so that the recesses 5 of the surface 2 are filled with Teflon 4.

(Function) The guide roller of the present invention is coated with Teflon 4 on the surface 2 of the metal roller 1 so that the recesses 5 of the ceramic 3 sprayed on the surface 2 of the metal roller 1 are filled with Teflon 4. 3
Teflon 4 has good bite.

In addition, the same guide roller is made of Teflon 4 when used.
Since the base material comes into contact with the Teflon 4, the base material is easily peeled off from the Teflon 4, and the ink printed on the base material is difficult to adhere to the Teflon 4.

Furthermore, the Teflon 4 wears until the convex part 6 of the ceramic 3 is exposed to the surface, but once the convex part 6 is exposed to the surface, the convex part 6 also comes into contact with the base material, so the Teflon filled in the concave part 5 4 hardly wears out unless the convex portion 6 wears out. Therefore, the durability of Teflon 4 is improved, and the base material includes not only the convex part 6 of ceramic 3 but also the surface of Teflon 4 that is on the same surface as the convex part 6 (the surface of Teflon 4 in the concave part 5).
Since the base material A is also in contact with each other, the base material A is less likely to be torn.

(Embodiment) Figures 1a and 1b show different embodiments of the guide roller of the present invention. In these figures, 1 is a metal roller and 2 is its surface. In this invention, this surface 2
Since it is necessary that the surface 2 has an uneven surface, a ceramic 3 is thermally sprayed onto the surface 2 to make the surface 2 a rough surface as shown in FIG.

4 in the figure is Teflon. This Teflon 4 is coated so as to bite into the recess 5 of the surface 2. Moreover, this Teflon 4 is coated on the metal roller 1 so that it has a uniform thickness from the center. In this case, the surface of the Teflon 4 dug into the recess 5 may be coated so that it is flush with the surface of the protrusion 6 of the ceramic 3, or the surface may be coated with Teflon 4 thickly and then polished with a diamond grindstone or the like. Then, as shown in FIG. 2, the surface of the Teflon 4 biting into the recess 5 and the surface of the protrusion 6 of the ceramic 3 may be made to be on the same plane.

(Effects of the invention) In the guide roller of the invention, the roughened surface 2 of the metal roller 1 is coated with Teflon 4, and the Teflon 4 is bitten into the recesses 5 of the surface 2, so that the following effect is achieved. There is an effect.

Teflon 4 has good adhesion to ceramic 3, and Teflon 4 does not easily peel off, resulting in good durability.

Since ink is less likely to adhere to Teflon 4, the surface of the guide roller is less likely to get dirty. Therefore, it is not necessary to clean the same surface as frequently as in the past, and therefore the printing press is less likely to be stopped, improving printing productivity.

Base material A because Teflon 4 is exposed on the surface.
has good releasability, and the base material A is less likely to adhere to the guide roller. Therefore, the base material A can be moved at high speed for printing, and printing productivity is improved.

The Teflon 4 wears out until the protrusions 6 of the ceramic 3 are exposed to the surface, but once the protrusions 6 are exposed to the surface, the protrusions 6 also come into contact with the base material, so from then on, the concave parts 5 are filled. Teflon 4 hardly wears out unless the convex portion 6 wears out. Therefore, the durability of Teflon 4 is improved, and the base material A includes not only the convex part 6 of the ceramic 3 but also the surface of Teflon 4 that is on the same surface as the convex part 6 (the surface of Teflon 4 in the concave part 5). Because of the contact, the peelability of the base material A is improved at the contact area between the surface of Teflon 4 and the base material A, and the feeding of the base material A becomes smooth.
Base material A that prevents wear of Teflon 4 due to contact between the surface of convex portion 6 and base material A, and improves durability.
becomes less likely to tear.

[Brief explanation of the drawing]

1A and 1B are front views showing different embodiments of the guide roller of the present invention, FIG. FIG. 4 is an explanatory diagram of a conventional guide roller. 1 is a metal roller, 2 is the surface of the metal roller,
3 is ceramic, 4 is Teflon, and 5 is recess.

Claims (1)

[Scope of utility model registration request] In guide rollers used to guide substrates such as printed paper and plastic films, ceramic 3 is thermally sprayed onto the surface 2 of a metal roller 1 and the surface 2 is processed to have an uneven surface. A guide roller characterized in that the surface 2 of the guide roller 2 is coated with Teflon 4 so that the concave portion 5 of the guide roller 2 is filled with Teflon 4.