JPH0376235B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a technique for printing, for example, a pattern such as wood grain on the inside corner of an aluminum profile.

It is already known that patterns such as wood grain can be printed on the surface of aluminum shapes used for indoor doors, shoji screens, etc., but with conventional printing methods, it is not possible to print patterns on the inside corners of aluminum shapes. This is nearly impossible, and for this reason,
This portion remains unprinted and is unfavorable in terms of appearance.

An object of the present invention is to provide a method for applying pattern printing to the unprinted portion, and a printing roll suitable for use in the method. A printing roll made of an elastic material and having an abacus bead shape is pressed against the printing roll, and the pattern on the printing roll is transferred to the approximately flattened surface of the printing roll, which is then restored to the mountain shape of the printing roll. The pattern is printed by pressing the pattern-transferred surface against the inner corner of the aluminum profile, and the printing rolls are made of polyurethane and have abacus-bead-like outer shapes, which are lined up at appropriate intervals. This is the point that was established.

Hereinafter, the present invention will be specifically explained based on the drawings.

In FIG. 1, 1 is a plate roll, 2 is a printing roll, 3 is a cleaning roll, and 4 is a pressure roll, each of which rotates in the direction of the arrow.

The printing roll 2 shown in FIG. 2 has a plurality of unit rolls 5 arranged side by side at appropriate intervals on a shaft 6, and the unit rolls 5 are made of an elastic material such as polyurethane and have an abacus-like outer shape. It is ball-shaped.

The distance between the axes of the printing roll 1 and the printing roll 2 is slightly smaller than the sum of the radii of both rolls, and the chain line 7 in FIG. 2 indicates the position of the printing surface of the printing roll 1 at the contact area of both rolls. ing.

The peripheral surface of the unit roll 5 is in the state shown in FIG. 3A before it comes into contact with the printing roll 1, and when it is in contact with the printing roll 1, it deforms as shown in FIG. In the step away from step 1, the original mountain shape is restored as shown in Figure C.

With the above configuration, in the method of the present invention, first,
The printing roll 2 is pressed against the printing roll 1 to transfer the pattern on the printing roll 2 to the substantially flat surface 8 of the printing roll 2, and then the pattern transfer surface of the printing roll 2 is restored to the mountain shape. 9 is pressed against the inside corner 11 of the aluminum profile 10 that passes between the printing roll 2 and the pressure roll 4, and a pattern is printed on this part. Printing can be performed simultaneously on the same number of aluminum profiles as the unit rolls 5.

The angle of the chevron portion of the printing roll 2 is the aluminum profile 10.
It is preferable that the angle be slightly smaller than that of the inside corner 11, and it is preferable that the apex of the chevron portion be slightly rounded.

It goes without saying that the above-mentioned printing is performed on an undercoat previously applied to the surface of the aluminum profile, and after printing, a topcoat is applied thereon.

Since the method of the present invention is as described above,
To easily and accurately print a pattern similar to that on other parts in an unprinted corner part when printing a pattern on the surface of an aluminum profile. Furthermore, the above-described method can be carried out efficiently by using the printing roll of the present invention.

[Brief explanation of drawings]

FIG. 1 is a schematic layout of rolls used in carrying out the method of the present invention, FIG. 2 is an embodiment of the printing roll of the invention, and FIG. 3 is a state diagram of the printing roll. In the figure, 1... version roll, 2... printing roll, 4
... Pressure roll, 5 ... Unit roll, ....

Claims (1)

[Claims] 1. A printing roll made of an elastic material and having an abacus bead shape is pressed against the printing roll to transfer the pattern on the printing roll to the substantially flat surface of the printing roll. A method for printing a pattern on an inside corner of an aluminum shape, characterized in that the pattern is printed by pressing the pattern transfer surface restored into the shape of a mountain onto the inside corner of the aluminum shape. 2. A corner pattern printing roll containing an aluminum profile, characterized in that it is made of a plurality of unit rolls made of polyurethane and having an abacus bead shape and arranged side by side at appropriate intervals.