JPH0524174A - Impression cylinder for gravure press - Google Patents

Abstract

PURPOSE:To obtain a light-weight impression cylinder by changing a material of a shaft center. CONSTITUTION:As a shaft center 2 to be peripherally wound with a rubber 3, an aluminum-made pipe or a carbon fiber-made pipe is used. On each end of the shaft center 2, an aluminum- or iron-made shaft part 5 is mounted by welding or with an adhesive. An inner race 7 on which a bearing 9 is to be loaded is mounted on the tip end of the shaft part 5 by shrink fitting. The weight of the shaft center 2 accounts for most part of the weight of an impression cylinder, and the shaft center 2 is made of aluminum or carbon fiber. As a result, the weight of the impression cylinder can be reduced as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impression cylinder used in a gravure printing machine.

[0002]

2. Description of the Related Art The mechanism of a general gravure printing machine has a structure as shown in FIG. 4, in which the ink in an ink pan 11 is transferred to the surface (plate surface) of a plate cylinder 12, and a doctor 13 is used to print the plate After scraping off the excess ink, the ink clogged in the cells on the plate surface is transferred to the surface of the original sheet passing between the plate cylinder 12 and the impression cylinder 14 for printing or coating with resin. ing. Reference numeral 15 is a gold roll for applying an appropriate pressure to the impression cylinder. And the impression cylinder 1
As shown in FIG. 5, as shown in FIG. 5, a shaft portion 18 is welded to both ends of a shaft core 17 made of an iron pipe around which a rubber 16 is wound, and a bearing 19 is attached to the shaft portion 18. Conventionally used.

[0003]

The above-mentioned impression cylinder described in the prior art has a problem that it is very heavy because an iron pipe is used for the shaft core. For this reason, the operator cannot lift this impression cylinder by himself, and it is necessary for two operators to hold both ends, and the replacement work of the impression cylinder was extremely inefficient.

The present invention has been made in view of the above problems, and an object thereof is to provide a lightweight impression cylinder for a gravure printing machine.

[0005]

In order to achieve the above object, the impression cylinder for a gravure printing machine of the present invention is characterized in that aluminum or carbon fiber is used for the shaft core. Attach aluminum or iron shafts by welding to both ends of the shaft core made of aluminum pipe wrapped with rubber,
An innerless bearing for mounting a bearing is attached to the tip side of the shaft by shrink fitting, or an aluminum or iron shaft part at both ends of a carbon fiber pipe with rubber wrapped around it. Is attached by an adhesive, and the innerless for mounting the bearing is shrink-fitted on the tip side of the shaft portion.

[0006]

In the pressure drum constructed as described above, the shaft core, which occupies most of the weight, is made of aluminum or carbon fiber, and the weight is reduced as a whole.

[0007]

1 is a perspective view showing an embodiment of an impression cylinder for a gravure printing machine as one mode of the present invention, and FIG. 2 is an enlarged view of a left end portion in FIG. The impression cylinder 1 has an axial core 2 made of an aluminum pipe, and ethylene around the axial core 2.
Synthetic rubber made of propylene terpolymer (EPT) 3
Is wound. Further, an aluminum shaft portion 5 having a hollow portion 4 formed inside is attached to both ends of the shaft core 2 by welding, and an innerless 7 shown in FIG. It is attached by fitting. Further, the innerless 7 has a bearing 9 by means of a snap ring 8.
Can be attached.

In another embodiment of the impression cylinder for a gravure printing machine according to the present invention, the shaft core 2 of the impression cylinder 1 of FIG. 1 is made of a carbon fiber pipe, and the shaft portion 5 is made of acrylic resin. It is fixed and attached with a special adhesive.

Since the shaft portion 5 is a small portion as a whole, iron may be used as its material, and the rubber 3 wound around the shaft core 2 may be butadiene-acrylonitrile rubber (NBR) or any other material. Synthetic rubber may be used.

The working width of the impression cylinder is 1270 mm, and the axis of the impression cylinder is iron (circumference 314 mm, thickness 8 mm), aluminum (circumference 314 mm, thickness 10 mm), carbon fiber (Trayca (registered trademark of Toray Industries, Inc.) ) Rolls (T-300), circumference 314 mm, thickness 10 mm), and the weight when aluminum is used for the shaft of each impression cylinder is shown in Table 1.

[0011]

[Table 1]

As described above, the weight of the impression cylinder is about 60% as compared with iron when the shaft core is made of aluminum, and about 50% as compared with iron when carbon fiber is used as the shaft core. became.

[0014]

As described above, since the impression cylinder for a gravure printing machine of the present invention uses aluminum or carbon fiber for its axis, the weight is smaller than that of an impression cylinder having a conventional iron axis. Since it is significantly lighter, the load of replacement work by the operator can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an impression cylinder for a gravure printing machine according to the present invention.

FIG. 2 is an enlarged view of a left end portion of FIG.

FIG. 3 is a perspective view of an innerless body.

FIG. 4 is a schematic view showing a mechanism of a gravure printing machine.

FIG. 5 is a perspective view showing a conventional impression cylinder for a gravure printing machine.

[Explanation of symbols]

1 impression cylinder 2 axis core 3 rubber 5 shafts 7 Innerless 9 bearings

Claims (2)

[Claims] 1. An aluminum or iron shaft is attached by welding to both ends of a shaft core made of an aluminum pipe having rubber wrapped around it, and an innerless for mounting a bearing is shrink-fitted on the tip side of the shaft. An impression cylinder for a gravure printing machine characterized by being installed in. 2. An aluminum or iron shaft is attached to both ends of a shaft made of a carbon fiber pipe having rubber wrapped around it with an adhesive, and an innerless for mounting a bearing is provided on the tip side of the shaft. An impression cylinder for a gravure printing machine, characterized by being fitted by shrink fitting.