JP2011230350A - Gravure offset printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gravure offset printing machine which can perform high definition printing process simultaneously with the increasing of productivity.SOLUTION: This gravure offset printing machine has the following construction: a silicone blanket cylinder 6 is installed between a gravure plate cylinder 1 with a recessed part for forming a scribed part formed on the circumferential surface and an impression cylinder 7. Time required for ink 3 to travel from point B to point C is set to the point of time when the cohesive power of the ink 3 delivered from the gravure plate cylinder 1 to the blanket cylinder 6 and transferred from the blanket cylinder 6 to a matter to be printed 8 culminates.

Description

  The present invention relates to a gravure offset printing machine that performs high-definition printing.

  Conventionally proposed gravure offset printing machines include what is called a so-called flat bed type as described in Patent Document 1. This will be described with reference to FIG. In FIG. 2A, reference numeral 20 denotes a pedestal that can be moved left and right and up and down in the figure. Reference numerals 23 and 24 denote a printing plate and a printing material, both of which are placed and fixed on the flat table 25. An ink supply roller 26 is provided on the flat table 25.

  In such a configuration, ink is supplied from the ink supply roller 26 to the ink form roller 21 by attaching the ink form roller 21 to the ink supply roller 26 as shown in FIG. Next, as shown in FIG. 5B, the ink jet roller 21 is attached to the printing plate 23 by moving the gantry 20 leftward and downward, and the cradle 20 is further moved leftward so that the printing plate Ink is transferred to 23.

  Next, after moving the gantry 20 upward at one end, it is moved to the right, and again moved downward as shown in FIG. 11C, so that the blanket cylinder 22 is attached to the printing plate 23, and the gantry is further moved. By moving 20 to the left, ink is transferred from the printing plate 23 to the blanket cylinder 22, and an image is formed on the blanket cylinder 22. In this state, the ink is transferred from the blanket cylinder 22 to the substrate 24 by further moving the gantry 20 leftward as shown in FIG.

  In the flat table type gravure offset printing machine described above, the ink transfer process for transferring the ink from the printing plate 23 to the blanket cylinder 22 and the ink transfer process for transferring the ink from the blanket cylinder 22 to the substrate 24 are separated. Yes. Therefore, in the case of this type of flat bed type, the ink transferred from the printing plate 23 to the blanket cylinder 22 has a condition that the ink cohesion is sufficiently increased when it is transferred to the substrate 24 and the ink is not excessively dried. The setting has the advantage that it can be performed by adjusting the time between the ink delivery process of the blanket and the ink transfer process. On the other hand, this flat table type has the disadvantage that productivity is extremely low because continuous printing is not possible because each process is separated.

Japanese Patent Publication No. 07-102693

  In order to eliminate this defect, let's improve productivity by adopting roll-to-roll which can continuously print without separating each process, such as supplying continuous printing material from supply roll and winding with take-up roll An attempt has been made. However, in this method, since the blanket cylinder is continuously transferred from the transfer of the ink to the transfer, there is a problem that the time for sufficiently increasing the ink condensing force is insufficient and high-definition printing cannot be performed. was there.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a gravure offset printing machine capable of increasing productivity and simultaneously enabling high-definition printing.

  In order to achieve this object, the present invention provides a gravure plate cylinder provided with a recess filled with ink on the peripheral surface, an ink supply device for supplying ink to the peripheral surface of the gravure plate cylinder, and the gravure plate A blanket cylinder that is in contact with the cylinder and receives ink from the gravure plate cylinder, and a pressure cylinder that faces the blanket cylinder, and performs printing on a printing material that passes between the impression cylinder and the blanket cylinder. In the gravure offset printing machine to be performed, the rotational angle of the blanket cylinder from the gravure plate cylinder to the blanket cylinder to the transfer position from which ink is transferred from the blanket cylinder to the printing material is 180 °. It is set above.

  The present invention relates to a gravure plate cylinder provided with a concave portion filled with ink on the peripheral surface, an ink supply device that supplies ink to the peripheral surface of the gravure plate cylinder, and a gravure plate cylinder that is in contact with the gravure plate cylinder In a gravure offset printing machine, comprising a blanket cylinder for delivering ink from and a pressure cylinder facing the blanket cylinder, and performing printing on a printing material passing between the impression cylinder and the blanket cylinder, The diameter of the blanket cylinder is set to an integer multiple of 2 or more of the diameter of the gravure printing cylinder.

  In the present invention, the diameter of the blanket cylinder is set to an integer multiple of 1 or more of the diameter of the gravure plate cylinder.

  According to the present invention, in any one of the above inventions, the time from when the ink is supplied to the gravure plate cylinder to when the ink is delivered to the blanket cylinder is the time when the ink supplied to the gravure plate cylinder The time is set so that the ink does not dry before the ink is delivered to the blanket cylinder.

  According to the present invention, in any one of the above inventions, the gravure plate cylinder can be moved and adjusted around the blanket cylinder so that the position of ink transfer from the gravure plate cylinder to the blanket cylinder can be adjusted. It is a thing.

  In the invention according to any one of the above inventions, the invention may include a position between a transfer position where ink is transferred from the gravure plate cylinder to the blanket cylinder and a transfer position where ink is transferred from the blanket cylinder to the substrate. Ink cohesive force imparting means for imparting cohesive force to the ink facing the ink is provided.

  According to the present invention, in any one of the above inventions, the ink contains a silver paste.

  The present invention is the invention according to any one of the above inventions, wherein at least the surface of the blanket cylinder is formed of a material having a low surface energy.

  According to the present invention, when a blanket cylinder that is easily elastically deformed is interposed between the gravure printing cylinder and the impression cylinder, when ink is delivered from the gravure printing cylinder, a part of the blanket cylinder is removed. Since the ink enters the concave portion, the ink delivery to the blanket cylinder is improved.

  According to one of the above inventions, since a blanket made of a material having a low surface energy is used, high-definition images can be formed on the blanket by preventing ink bleeding on the blanket. . The ink delivered to the blanket cylinder is sufficiently increased in cohesion by the solvent volatilizing before being transferred to the printing material. As described above, the ink can be transferred from the 100% blanket to the printing material without dividing by transferring the printing material to the printing material with the surface energy of the blanket being low and the cohesion of the ink being sufficiently increased (raw dry state). . Further, since the image surface on the substrate reflects the surface state of the blanket, an extremely smooth printing surface is formed.

It is a side view which shows the arrangement | sequence of the cylinder of the principal part of the gravure printing machine which concerns on this invention. In the gravure printing machine which concerns on this invention, it is a schematic diagram which expands and shows the principal part for demonstrating acceptance and transfer of ink. In the 2nd Embodiment of this invention, it is a side view which shows the arrangement | sequence of the trunk | drum of the principal part. In the 3rd Embodiment of this invention, it is a side view which shows the arrangement | sequence of the trunk | drum of the principal part. It is a side view which shows the structure of the outline of the conventional gravure printing machine.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[Embodiment 1]

  As a method for performing high-definition printing by a gravure offset printing machine, printing using a material having a low surface energy such as silicone for a blanket has been proposed. There are two main reasons for using silicone or the like as a blanket material. One is that by using a blanket having a sufficiently low surface energy compared to ink, wetting and spreading of the ink on the blanket when the ink is transferred to the blanket can be prevented. As a result, an image faithful to the pattern of the plate can be formed on the blanket.

  The other is that the ink cohesive strength on the blanket is sufficiently increased and that the ink is not excessively dried. It can be transferred to printed matter. As a result, defects such as pinholes can be prevented. Further, the surface of the blanket is usually finished by polishing or the like in order to make it easy to separate the ink, and the surface of the printed ink can form a very smooth surface that is a copy of the surface of the blanket. The present invention utilizes the characteristics of this silicone.

  First, the first embodiment of the present invention will be described with reference to FIG. 1 and FIG. In FIG. 1, what is indicated by reference numeral 1 is a gravure plate cylinder to which ink 3 containing silver paste is supplied from the ink supply device 4 at the supply position A, and a doctor blade 5 as a blade. As a result, the ink 3 is filled in the recesses 2 provided on the peripheral surface, and excess ink adhering to the peripheral surface is scraped off. Reference numeral 6 denotes a silicone blanket cylinder having a low surface energy at which the gravure plate cylinder 1 contacts each other's peripheral surface, and the ink 3 is transferred from the gravure plate cylinder 1 at a transfer position B where the respective peripheral surfaces contact each other. It is.

  Here, the time from when the ink is supplied to the gravure plate cylinder 1 at the supply position A to when the ink is transferred to the blanket cylinder 6 at the transfer position B is transferred to the blanket 6 at the transfer position B. In this embodiment, the time required for the gravure plate cylinder 1 to rotate 180 ° is set so that the ink does not dry.

  The ink 3 transferred to the blanket cylinder 6 at the transfer position B point is transferred to the printing material 8 supplied between the blanket cylinder 6 and the impression cylinder 7 at the transfer position C point. In the first embodiment, the diameter R1 of the gravure plate cylinder 1, the diameter R2 of the blanket cylinder 6, and the impression cylinder 7 are all formed to have the same diameter.

  Here, the time from when the blanket cylinder 6 is transferred from the gravure plate cylinder 1 to the printing medium 8 at the transfer position B to when the blanket cylinder 6 transfers the ink 3 to the substrate 8 at the transfer position C, It is set so that sufficient time can be taken to increase the cohesive strength of the ink. That is, the time from the delivery of the ink 3 at the receiving position B to the transfer of the ink 3 at the transfer position C is set to the time required for the blanket cylinder 6 to rotate by 180 ° or more. The time required for the blanket cylinder 6 to rotate 270 ° is set.

  The time here is determined by the rotational speed of the printing press (cylinder), the transport distance (between A and B), and (between B and C). That is, the conveyance distance (between A and B) of the gravure plate cylinder 1 is a distance at which the ink does not dry due to the rotational speed of the printing press (cylinder), and the conveyance distance of the blanket cylinder 6 (between B and C) is The supply position A for supplying the ink from the ink supply device 4 to the gravure plate cylinder 1 and the blanket from the gravure plate cylinder 1 so that the distance at which the ink is condensed by the rotational speed of the printing press (cylinder) A transfer position B for transferring ink to the cylinder 6 and a transfer position C for transferring ink from the blanket cylinder 6 to the substrate 8 are set.

  Next, a printing operation in the gravure printing machine configured as described above will be described. The ink 3 supplied to the peripheral surface of the gravure plate cylinder 1 from the ink supply device 4 is filled into the concave portion 2 by the doctor blade 5 and the excess ink attached to the peripheral surface of the gravure plate cylinder 1 is scraped off. It is done. At this time, as shown in FIG. 2A, the ink 3 filled in the recess 2 is slightly scraped off by the doctor blade 5 and has a concave surface.

  The ink 3 filled in the recess 2 is transferred to the blanket cylinder 6 at the transfer position B point. At this time, since the ink 3 is not dried, no defective transfer occurs, and the blanket cylinder 6 is formed of silicone having a low surface energy, so that the ink bleeds on the blanket cylinder 6. By being prevented, a high-definition image is formed on the blanket cylinder 6. Further, since the blanket cylinder 6 is formed of silicone that is easily elastically deformed, a part of the blanket cylinder 6 enters the recess 2 as shown in FIG. For this reason, the blanket cylinder 6 and the ink 3 are in close contact with each other even though the surface of the ink 3 filled in the recess 2 has a concave shape. Therefore, as shown in FIG. Ink 3 is reliably delivered.

Ink transferred to the blanket cylinder 6 moves from the transfer position B point to the transfer position C point in FIG. 5C, and the solvent volatilizes until the ink is transferred to the substrate 8 so that the cohesive force is increased. Sufficiently increased and strong adhesion. In this way, by transferring the blanket cylinder 6 to the printing material 8 in a state where the surface energy of the blanket cylinder 6 is low and the cohesive force of the ink is sufficiently increased, 100% of the ink without ink separation is transferred from the blanket cylinder 6 to the printing material. 8 can be transferred. Further, since the image surface on the substrate 8 reflects the surface state of the blanket cylinder 6, an extremely smooth printing surface 3a is formed. Therefore, high-definition printing can be performed by the ink transferred from the blanket cylinder 6 to the substrate 8 at the transfer position C. Therefore, even when a high-definition wiring pattern is formed with the ink 3 in particular, the disconnection and the line width are not reduced. In the first embodiment, the diameter R2 of the blanket cylinder 6 is the same as the diameter R1 of the gravure plate cylinder 1. However, the present invention is not limited to this. What is necessary is just to set it as the integer multiple of 1 or more.
[Embodiment 2]

  Next, a second embodiment of the present invention will be described with reference to FIG.

  In the second embodiment, by changing the diameter of the blanket cylinder 6, the blanket cylinder 6 at the transfer position C from the time when the blanket cylinder 6 delivers the ink 3 from the gravure plate cylinder 1 at the transfer position B. The time until the ink 3 is transferred to the substrate 8 is changed.

  The time here is determined by the rotational speed of the printing press (cylinder) and the transport distance (between B and C). That is, the transfer position of the blanket cylinder 6 (between B and C) is a transfer position for transferring ink from the gravure plate cylinder 1 to the blanket cylinder 6 so that the ink is condensed by the rotational speed of the printing press (cylinder). B and a transfer position C for transferring ink from the blanket cylinder 6 to the substrate 8 are set.

  In other words, the diameter R2 of the blanket cylinder 6 is twice the diameter R1 of the gravure plate cylinder 1, and the ink transferred from the gravure plate cylinder 1 at the transfer position B is transferred to the blanket cylinder 6 at the transfer position C. When the ink 3 is transferred from the ink to the substrate 8, the condensing force can be sufficiently increased. By being configured in this way, the same effects as those of the first embodiment described above can be obtained also in the second embodiment.

In the second embodiment, the diameter R2 of the blanket cylinder 6 is twice the diameter R1 of the gravure plate cylinder 1. However, the present invention is not limited to this, and R2 is set to R1 as necessary. May be an integer multiple of 2 or more.
[Embodiment 3]

  Next, a third embodiment of the present invention will be described with reference to FIG. In the third embodiment, an air blowing device 10 is provided as an ink aggregating force imparting means for increasing the aggregating force of ink, and a delivery position B point on the outer peripheral surface of the blanket cylinder 22 from the air blowing device 10. And the transfer position C point. Therefore, while the ink transferred from the gravure printing cylinder 1 to the blanket cylinder 6 at the transfer position B is transferred to the substrate 8 by the blanket cylinder 6 at the transfer position C, the air blowing device 10 The air that is blown from the ink sufficiently increases the condensing power of the ink transferred from the blanket cylinder 6 to the substrate 8 at the transfer position C. In addition, as in the first embodiment described above, it is easy to secure a space for providing the air blowing device 10 by lengthening the path from the transfer position B point to the transfer position C point.

  In the third embodiment, as the ink cohesion force imparting means, not only air but also hot air may be blown, or an infrared dryer may be provided instead of blowing air. In short, what is necessary is just to dry the solvent of the ink.

  In the present embodiment, at least the surface of the blanket cylinder 6 is formed of silicone having a low surface energy, but the present invention is not limited to this, and PTFE (polytetrafluoroethylene) or PVDF (polyvinylidene fluoride) is also used. The point is that the surface energy is low and the releasability is good. In the present invention, the ink delivery position B from the gravure plate cylinder 1 to the blanket cylinder 6 with respect to the transfer position C is fixed in accordance with the change of the ink using the ink from the blanket cylinder 6, but the ink is transferred at the transfer position C. The gravure plate cylinder 1 may be moved and adjusted around the blanket cylinder 6 so that the ink transfer position B can be adjusted so that a sufficient condensing force can be obtained.

  DESCRIPTION OF SYMBOLS 1 ... Gravure plate cylinder, 2 ... Concave, 3 ... Ink, 3a ... Printing surface, 4 ... Ink supply apparatus, 5 ... Doctor blade, 6 ... Blanket cylinder, 7 ... Impression cylinder, 8 ... To-be-printed object, 10 ... Air blowing apparatus (Ink cohesive force imparting means).

Claims (8)

A gravure plate cylinder provided with a recess to be filled with ink on the peripheral surface, an ink supply device for supplying ink to the peripheral surface of the gravure plate cylinder, and receiving ink from the gravure plate cylinder in contact with the gravure plate cylinder In a gravure offset printing machine that includes a passed blanket cylinder and an impression cylinder facing the blanket cylinder, and performs printing on a printing material that passes between the impression cylinder and the blanket cylinder.
The rotation angle of the blanket cylinder from the transfer position where the ink is transferred from the gravure plate cylinder to the blanket cylinder to the transfer position where the ink is transferred from the blanket cylinder to the substrate is set to 180 ° or more. Gravure offset printing machine. A gravure plate cylinder provided with a recess to be filled with ink on the peripheral surface, an ink supply device for supplying ink to the peripheral surface of the gravure plate cylinder, and receiving ink from the gravure plate cylinder in contact with the gravure plate cylinder In a gravure offset printing machine that includes a passed blanket cylinder and an impression cylinder facing the blanket cylinder, and performs printing on a printing material that passes between the impression cylinder and the blanket cylinder.
A gravure offset printing machine characterized in that the diameter of the blanket cylinder is set to an integer multiple of 2 or more of the diameter of the gravure printing cylinder.   2. The gravure offset printing machine according to claim 1, wherein a diameter of the blanket cylinder is set to an integer multiple of 1 or more of a diameter of the gravure printing cylinder.   The time from when the ink is supplied to the gravure plate cylinder until the ink is delivered to the blanket cylinder, the time when the ink supplied to the gravure plate cylinder does not dry before the ink is delivered to the blanket cylinder The gravure offset printing machine according to claim 1 or 2, characterized in that it is set.   3. The gravure according to claim 1, wherein the gravure plate cylinder is movable and adjustable around the blanket cylinder so that a position for transferring ink from the gravure plate cylinder to the blanket cylinder can be adjusted. Offset printing machine.   Ink for imparting a cohesive force to the ink facing the ink between the transfer position where the ink is transferred from the gravure cylinder to the blanket cylinder and the transfer position where the ink is transferred from the blanket cylinder to the substrate The gravure offset printing machine according to claim 1 or 2, further comprising a cohesive force imparting unit.   The gravure offset printing machine according to claim 1 or 2, wherein the ink contains a silver paste.   The gravure offset printing machine according to claim 1 or 2, wherein at least a surface of the blanket cylinder is formed of a material having a low surface energy.

Images