JPS61106254A - Keyless inking apparatus - Google Patents

Abstract

PURPOSE:To eliminate a necessity for regulating ink by returning the ink remaining on an inking roll corresponding to the non-printing area of a machine plate, to an ink pan with an ink doctor roller. CONSTITUTION:An ink squeezing roll 5 is made of hard rubber or hard urethane, and receives approximately proper quantity of ink from a fountain roll 1 through a doctor blade 4, and it is pressure-contacted and interlocked with an inking roll 6 made of rubber and, at the same time, the inking roll 6 is pressure-contacted and interlocked with the plate cylinder 7 also. An ink taking roll 8 made of metal is pressure-contacted with the inking roll 6 which supplied ink to the machine plate on the plate cylinder 7. The ink taking roll 8 has a doctor blade 9 which is installed with its tip touching the roll, and which returns the ink adhered back to the ink pan 2. The ink taking roll 8 may be installed to make vibration in its axial direction. Speeds of the squeezing roll 5, inking roll 6 and ink taking roll 8 are designed to be the same with the printing speed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a keyless inking device for a printing machine.

(Prior Art) As a conventional device of this type, an anilox inking device shown in FIG. 2 is known. In the figure, the ink drawn from the ink pan 21 to the fountain roll 22 is piled up in the cells 24 of the amyl roll 23 and scraped off by a blade 25, and the scraped ink is returned to the ink pan 21. The ink inside the cell 24 is self-adhered to the roll 26, and the outer lid forms an ink film of a constant thickness on the roll 27. The coating supplies the required amount of ink to the printing area on the roll 26, 27H plate cylinder 28, the ink is consumed by printing, and the ink film of a certain thickness is formed by contacting the amylol 25 again. is formed. In addition,
29 is a push cylinder.

As shown in FIGS. 6(a) and 4(a), the amylol 23 has cells 24 formed at a density of 200 or 500 lines per inch. The formed cell 24 is a point pyramid as shown in FIG. 3(b), a flat top pyramid shape as shown in FIG. 4(b), and a screen angle of 45°. will be established.

(Problems to be Solved by the Invention) As explained above, in the anilox device, the tip of the doctor plate needs to face the amylol. If the contact with the amylol is too strong, the blade will wear out quickly and damage the amylol, and if it is too weak, the ink will smudge too much and printing will be impossible. Therefore, the lifespan of not only the doctor plate but also the amylol becomes a problem. Moreover, since the roll surface is machined with highly precise cells to make it wear resistant, it is also expensive. That is, the anilox device has problems in that it is expensive and the maintenance and adjustment of the doctor plate is delicate.

(Means for solving the problem and its effect) Adjust the ink on the fountain roll called out from the ink vat so that it is uniform and in an appropriate amount, and pass it to the squeeze roll, and the ink on the squeeze roll is The inked roll is inked and passed to the printing area of the printing plate, and the ink remaining on the inking roll corresponding to the non-printing area on the printing plate is transferred to the ink vat via an ink removal roll. It is characterized in that the ink on the inking roll is metabolized so that it is always uniform and in an appropriate amount, so that ink adjustment is not necessary.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure is a schematic configuration diagram of an embodiment of the present invention. In the same figure,
The fountain roll 1 is provided in the ink 3 of the ink pan 2 so as to be rotatable, for example, in a clockwise direction at a speed reduced from the printing speed of the printing machine. A doctor plate 4 is facing. The drawing roll 5 is a roll made of hard rubber or hard urethane, to which an appropriate amount of ink is passed from the fountain roll 1 after interposing the doctor plate 4. The squeeze roll 5 is pressed and interlocked with a rubber inking roll 6, and this inking roll 6 is also pressed and interlocked with a plate cylinder 7. A metal ink removal roll 8 is press-fitted to an inking roll 6 that has applied ink to the printing plate of the plate cylinder 7. A doctor plate 9 is attached to this ink removal roll 8, and a doctor plate 9 returns the ink attached to the roll 8 into the ink pan 2.
are attached by touching their tips. Furthermore, the ink remover roll 8 may be configured to vibrate in the axial direction. Reference numeral 11 is a shielding plate for preventing the ink removed from the ink remover roll 8 from scattering toward the squeezing roll 5, and 10 is a press cylinder. Note that the speeds of the squeezing roll 5, inking roll 6, and ink removal roll 8 are configured to be the same as the printing speed. Figure 1 shows the configuration for letterpress printing; in offset printing, the plate cylinder 7 serves as a plan cylinder, and the rotation directions of the rolls shown in the figure are all reversed, and the arrangement is also reversed. It becomes arbitrary.

Next, the operation of this embodiment will be described.

Ink 3 in the ink pan 2 is called out by the rotating fountain roll 1, excess ink is returned to the ink pan 2 by the doctor plate 4 through a path shown in the figure 13, and an amount of ink close to the proper amount is delivered to the squeezing roll 5.

The squeeze roll 5 uniformly feeds an appropriate amount of ink to the inking roll 6 depending on the difference in the amount of crimping and circumferential speed with the fountain roll 1, and the squeeze D roll 5
The ink taken out is placed on both end surfaces 1 of fountain roll 1.
The ink is returned to the ink pan 2 via a. The ink on the circumferential surface of the inking roll 6 is not affected by pressure with the inking roll 6 because the material of the roll A is rubber and the printing plate attached to the plate cylinder 7 is made of metal or hard resin. The plate is smoothly transferred to the printing plate of the plate cylinder 7. However, since the ink in the area corresponding to the non-image area of the printing plate on the circumferential surface of the inking roll 6 remains on the circumferential surface of the inking roll, the ink is removed before it comes into contact with the diaphragm 90-rule 5 again. Give this remaining ink to Toshiroru 8.

The ink transferred to the ink removal roll 8 is removed by a doctor plate 9 disposed in complete contact with the roll 8 as shown in the figure.
The ink is removed through the ink pan 2 and returned to the ink pan 2. Further, when the ink remover roll 8 is vibrated in the axial direction, the ink transferred to the ink remover roll 8 is completely returned to the ink pan 2. Separately, the ink remaining on the inking roll 6 is removed by an ink removal roll 8.
Due to the pressure between the inking roll 6 and the inking roll 6, the ink is returned into the ink pan 2 through the path 11 shown in the figure from the contact between the rolls 8 and 6. Furthermore, even if the ink that returns from the ink remover roll 8 to the ink pan 2 is scattered, it can be
The ink does not adhere to the squeeze roll 5 side because it is blocked by the squeeze roll 5, and does not disturb the uniformity of the ink drawn to the squeeze roll 5.

In addition, in the embodiment shown in FIG.
In order to uniformly draw out the appropriate amount of ink, a doctor plate 4 is provided, but since the fountain roll 1 rotates at a low speed, a squeezing roller or the like that can achieve the same purpose is placed in place of the doctor plate 4. May be used.

(Effects of the Invention) As explained above, in the present invention, the ink in the ink pan is uniformly distributed to the squeeze roll through the fountain roll equipped with a doctor plate, and the ink is uniformly distributed on the squeeze roll. A targeted and appropriate amount of ink is inked onto an inking roll, and the ink is delivered to the printing area of the printing plate. The ink left on the inking roll corresponding to the non-printing area of the printing plate is returned to the ink pan via the ink removal roll, so the ink on the inking roll is always uniform and in an appropriate amount. It is metabolized as follows.

Therefore, the present invention does not require ink adjustment as in conventional printing systems. Moreover, unlike conventional anilox rolls, the present invention does not require high precision in manufacturing, so the anilox device is not expensive, and there is no troublesome adjustment work like a doctor plate for amyl roll in an anilox device. It has excellent effects.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Figs. 2 to 4 relate to the conventional system, and Fig. 2 is a block diagram of an anilox device.
Figure 3(a), Figure 4(a) Front view of 7 amylol,
FIG. 3(b) and FIG. 4(b) are perspective views showing the shape of amylol cells. 1... Fountain roll 2... Ink pan 3...
...Ink 4.9...Doctor plate 5...Squeezing roll 6...Inking roll 7...
・Plate cylinder 8... Ink removal roll 10
... Push cylinder 11 ... Shielding plate agent Patent attorney Kubo 1) Ryoaki (Q) (a) (b) (b)

Claims (1)

[Claims] A low-speed rotating fountain roll equipped with a means to uniformly and almost appropriately call out the ink in the ink pan, a squeezing roll to which the ink is passed in pressure contact with the fountain roll, and an ink forming roller that is in pressure contact with the squeezing roll. an inking roll that transfers ink to the image area of the printing plate; and an inking roll that presses and interlocks with the inking roll and applies ink to a portion corresponding to the non-image area of the printing plate that remains on the inking roll. A keyless inking device comprising: an ink removing roll with a doctor plate that returns the ink to the ink pan.