JPS6347480Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention has a plate cylinder that is movable in the horizontal direction and has a flexo plate that is in contact with an impression cylinder and an inking cylinder that are arranged in the vertical direction. The present invention relates to a vertical flexographic printing device.

(Prior Art) Conventional flexo printing apparatuses are mainly of the so-called horizontal type in which the impression cylinder, plate cylinder, and inking cylinder shown in Fig. 1 are arranged in a nearly horizontal direction, and this depends on the printing speed. had the disadvantage that during operation, ink flying from the ink pan or plate cylinder adhered to and contaminated the printing material running in the vertical direction.

This drawback can be eliminated by devising the arrangement of the plate cylinder, impression cylinder, etc., which is described in Japanese Patent Publication No. 5426/1983.

(Problems to be Solved by the Invention) Generally, in a vertical flexo printing apparatus, it is more difficult to move the plate cylinder than in a horizontal type.

The rotary flexographic printing machine described in Japanese Patent Publication No. 55-5426 mentioned above has a movable frame that supports the plate cylinder, thereby facilitating movement of the plate cylinder.

However, there are two types of movement of the plate cylinder: large movements to replace the plate cylinder, and fine adjustment of the degree of pressure contact with the impression cylinder and inking cylinder. The rotary flexo printing press described in the publication has only one advancing/retracting mechanism for swinging the movable frame, and therefore has the disadvantage that it cannot be adapted to both of these two cases of movement of the plate cylinder.

(Means for Solving the Problems) Therefore, the present invention aims to prevent contamination of the printing material due to ink flying during flexo printing, and to facilitate the replacement and fine adjustment of plate cylinders. The plate cylinder, which has a flexo plate in contact with the impression cylinder and the inking cylinder, is subject to large movements in the horizontal direction by a rack and pinion device, etc., and fine adjustment of the degree of pressure contact with the impression cylinder and the inking cylinder by an air cylinder, etc. We have devised a vertical flexo printing device that is possible and is configured so that it is always in pressure contact with the impression cylinder and the inking cylinder, regardless of the size of the diameter.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

What is shown in FIG. 1 is a conventional horizontal type device.
That is, the ink applicator cylinder 5', which is partially immersed in the ink 2' in the ink pan 1', is in contact with the ink applicator cylinder 6' diagonally above, and is located at approximately the same level as the ink applicator cylinder 6'. A plate cylinder 7' having a flexo plate 8' is in contact with the impression cylinder 9' located outside the ink pan 1', and the printing material 4' is placed between the impression cylinder 9' and the plate cylinder 7'. It passes upwardly rather than downwardly.

Further, as shown in FIG. 2, the plate cylinder 7' is supported by a vertically split bearing.

In this conventional device, since the cylinder arrangement is close to the horizontal direction, when the printing speed is increased, the agitation of the ink 2' in the ink pan 1' increases, resulting in ink skipping.
a', and when the impression cylinder 9' and the plate cylinder 7' rotate with the printing medium 4' in between, the excess ink film adhering to the surface of the flexographic plate 8' is
When the flexo plate 8' separates from the printing medium 4', the ink splatters 3.
yields b′. These ink splatters 3a' or 3
b' adheres to and contaminates the printing material 4' running in the vertical direction.

Therefore, in the apparatus of the present invention, in order to prevent contamination caused by flying ink, the cylinders are arranged vertically in the vertical direction.

That is, as shown in FIG.
The ink squeezing cylinder 5, which is partially immersed in the ink 2 therein, is in contact with an inking cylinder 6 above it, and an impression cylinder 9 disposed above it.
A plate cylinder 7 having a flexo plate 8 is in contact with the plate cylinder 7 from the horizontal direction, and the printing material 4 is in contact with the impression cylinder 9 from the horizontal direction.
and the plate cylinder 7 and exits upward.

The horizontal movement of the plate cylinder 7 is based on the following structure.

A support shaft 14 of a support member 13 that supports the plate cylinder 7 is inserted into a holding cylinder 12 that is slidable with respect to the machine frame 10 by a rack and pinion device 11. A cam follower 15 is attached within the holding cylinder 12, and an air cylinder 16 is provided at the end of the holding cylinder 12.

Even when the apparatus of the present invention is operated at a speed about twice the maximum speed at which ink does not fly in conventional apparatuses, the cylinders are arranged in the vertical direction, and the printing medium 4 enters horizontally and exits upward. Therefore, even if there is ink splatter 3a or 3b as before,
It never occurs that it sticks to the printing substrate 4, so that there is no risk of contaminating the printing substrate 4 thereby.

Moreover, despite this arrangement of cylinders, the plate cylinder 7 is configured as shown in FIG. As shown in FIG. 2 of the conventional apparatus, the plate cylinder 7 can be easily replaced, and the degree of pressure contact with the impression cylinder 9 and the inking cylinder 6 can be finely adjusted by moving only the plate cylinder 7. , MS, GS, . . . through the cam follower 15 in the air cylinder 16.

(Effects of the invention) As explained above, the apparatus of the present invention uses a flexo plate as the plate cylinder, and even when rotating at about twice the speed of conventional apparatuses, the cylinders are arranged vertically in the vertical direction. , since the impression cylinder is at the highest position and the printing material enters from the horizontal direction and runs upwards,
Even if the ink splatter phenomenon occurs, it will not adhere to the printing material, and therefore there is no risk of contamination.

Moreover, despite this vertical arrangement of cylinders, the plate cylinders are moved horizontally by means of rack and pinion devices, air cylinders, etc., making it easy to replace the plate cylinders. Moreover, fine adjustment of the degree of pressure contact with the impression cylinder and the inking cylinder is also easy.

[Brief explanation of the drawing]

Fig. 1 is an explanatory front view of the conventional device, Fig. 2 is a front view of the bearing portion of the plate cylinder of the above, Fig. 3 is an explanatory front view of the device of the present invention, and Fig. 4 is the plate cylinder of the same. FIG. 3 is a front view of the moving device of FIG. 1, 1'... Ink pan, 2, 2'... Ink, 3
a, 3b, 3a', 3b'... ink splatter, 4, 4'...
Printing material, 5, 5'... Ink squeezing cylinder, 6, 6'... Inking cylinder, 7, 7'... Plate cylinder, 8, 8'... Flexo plate, 9, 9'... Impression cylinder.

Claims (1)

[Scope of utility model registration request] In a vertical flexo printing apparatus in which an impression cylinder, a plate cylinder, an ink forming cylinder, and an ink squeezing cylinder are arranged vertically, the support shaft 14 of the support member 13 that supports the plate cylinder is horizontally moved by a rack and pinion device 11. The holding cylinder 1 is fitted into a slidable holding cylinder 12.
2 is attached with an air cylinder 16 that moves the support shaft 14 in the horizontal direction, and the support shaft 14 is guided by a cam floor 15 provided in the machine frame 1 and the holding cylinder 12, Vertical flexographic printing characterized in that the plate cylinder is moved largely in the horizontal direction, and the degree of pressure contact of the plate cylinder with the impression cylinder and the inking cylinder is finely adjusted by an air cylinder 16. Device.