JPS59142151A - Varnish coater for print - Google Patents

Abstract

PURPOSE:To remarkably improve the working efficiency and to save labors by a construction in which the supply of varnish and the cleaning of a varnish vessel are performed selectively by an operation of a pump and the switching of valves. CONSTITUTION:During varnish coating operation, varnish 35 in a varnish tank 33 is pumped up by a pump 41 and supplied to a varnish vessel 26 through a supply hose 59, while an overflow is returned to the varnish tank 33 through an overflow hose 65 and a discharge hose 61. When a cleaning operation is conducted, a valve 64 is opened to return the whole of the varnish 27 in the varnish vessel 26 to the varnish tank 33, and thereafter a pump 42 is rotated while valves 50 and 56 are opened. Thereby cleaning water 37 is pumped up by the pump 42 and led to nozzles 49 and 53 through pipings 51 and 57, and the water employed for cleaning rollers is discharged to a drain ditch through hoses 58 and 52a. When a solenoid valve 60 is switched to the pump 42 side and a solenoid valve 63 to the drain hose 62 side, the cleaning water 37 is supplied to the varnish vessel 26 for cleaning the inside thereof through the supply hose 59, and the water after the cleaning is drained through the discharge hose 61 and the drain hose 62.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention provides a method for applying varnish to the printed surface of paper after printing by providing a varnishing device between a printing unit and a paper discharge device of a rotary printing press or in an independent varnishing machine. The present invention relates to a varnishing device for varnishing printed matter.

[Prior art]

The printed surface of paper printed with a rotary printing machine is easily smudged in subsequent processes because the ink dries slowly, and in the case of sheet-fed paper, back transfer occurs when stacking the discharged paper, so this should be avoided. In order to prevent this, a drying device is installed in the conveyance path of the printed paper, or a spray powder is sprinkled at this location. However, the drying equipment requires a large amount of equipment, and in the case of dust, the paper becomes rough and loses its luster, which can be a problem when printing. Painting to prevent staining and to give gloss to the paper surface is mainly carried out for printed matter that requires beauty, such as book covers, catalogs, and pamphlets.

This type of varnishing equipment is sometimes installed as an independent varnishing machine, but it is not efficient due to the direct work time and the need to transfer paper, so in recent years this type of varnishing equipment has been installed as an independent varnishing machine. It is generally adopted to provide it within the conveyance path. Its structure includes a roller group arranged in the same way as a water supply device that supplies water to the surface of a printing plate mounted on the plate cylinder of a printing device, and the varnish stored in the varnish tank is passed through this roller group. In most cases, the varnish is supplied to the surface of the blanket cylinder, and the varnish is transferred from the blanket cylinder to the paper passing between the blanket cylinder and the impression cylinder.

The varnish used in the varnishing device of this scale is a water-based varnish that dries quickly.When applied to paper, it dries quickly and has the function of preserving the surface of the printed paper. If the roller in the transfer path is stopped even for a short time, the thin film varnish on the circumferential surface of the roller dries, making subsequent processing extremely troublesome.

In this case, conventionally the rollers and varnishing boat were washed by hand, but in recent years roller cleaning devices have been installed in the varnishing equipment, and while the printing press is stopped, the varnishing roller is rotated and cleaning solution is applied to it while the doctor knife is washed. Wiping is being done.

However, with conventional equipment, it is not possible to wash the varnish boat at the same time, and this must be done separately by hand. Also, it takes time to wash the hose after washing the rollers, which is not only inefficient, but also removes the varnish with the cleaning liquid. Satisfactory performance in terms of dissolution could not be expected.

[Summary of the invention]

The present invention has been made in view of the above points, and a tank consisting of a varnish tank and a solvent tank equipped with a pump and a heating means, and a varnish tank in the varnishing section are connected to a supply flow tank equipped with a valve. In order to improve work efficiency, it is possible to connect the varnishing channel and the discharge channel, and to selectively supply varnish to the varnishing boat and wash the varnishing boat by operating the pump and switching the valve. The present invention provides a printed matter varnishing device that is improved and reduces labor. Embodiments of the present invention will be described in detail below with reference to the drawings.

〔Example〕

This embodiment shows an example in which the present invention is implemented in a four-color sheet-fed rotary printing press, and FIG. 1 is a schematic side view of the printing press in which this is implemented.
FIG. 2 is a schematic side view of the fourth color printing unit and varnishing schnit, and FIG. 3 is a schematic diagram of the varnishing device. In the figure, a printing press 1 is equipped with a paper feeder 2, a four-color printing unit 3, a varnish coating 4, and a paper ejection device 5, and each of these devices is assembled separately and joined together. There is. Each printing unit 3 is provided with a plate cylinder 6 on which a printing plate is mounted on the circumference, an inking device (not shown) that supplies ink to the plate surface, and a water supply device T that supplies dampening water. A blanket cylinder 8 that transfers an image formed on the plate surface using ink and dampening water is in contact with the plate cylinder 6. In each printing unit 3, a double-diameter impression cylinder 9 is disposed in opposition to the blanket cylinder 8, and between each adjacent impression cylinder 9, a double-diameter transfer cylinder 10 is arranged between both impression cylinders 9. They are installed opposite each other. In addition, the varnished Schnitt 4 also has a double-diameter impression cylinder 11 installed at the same height as the other impression cylinders, and a transfer cylinder 12 is also provided between the impression cylinder 11 and the impression cylinder 9 for the fourth color. It is arranged. The paper 13 stacked on the paper stacking table of the paper feeder 2 is sucked one by one by a sucker device (not shown) and sent onto the differential plate 14, and then the swing device moves the paper 13 to the impression cylinder 9 for the first color. After that, while the transfer cylinder 10 and the impression cylinder 9 alternately change the grips while being conveyed, printing in four colors is applied between the blanket cylinder 8 and the varnish. Impression cylinder 1 of coating unit 4
It is held in the claw of 1 and wrapped around the surface. Paper discharge device 5
The paper discharge cylinder 15 is in contact with the impression cylinder 11, and a pair of left and right sprockets 16 are coaxially fixed thereto. A paper discharge chain 19 having a large number of paper discharge molds at regular intervals is stretched between them. Then, the paper 13 held in the claws of the impression cylinder 11 is transferred to the paper ejection mold of the paper ejection chain 19, and is released from the paper ejection mold at the end of the conveyance and falls onto the paper stacking table 20 and is stacked. be done.

The varnishing schnitte 4 of the printing press 1 having the general structure described above is provided with a varnishing device generally designated by the reference numeral 21. The varnishing roller of this varnishing device 21 is
A blanket cylinder 22 that faces the impression cylinder 11 and has a blanket wrapped around it, and a roller 223 that faces the blanket cylinder 22.
The blanket cylinder 22 is composed of a metering roller 24 that is in contact with the roller, and a base roller 25 that is in contact with the metering roller 24. Of these, the blanket cylinder 22 is rotated by an eccentric bearing that supports it. By doing so, the roller 23 and the impression cylinder 11 are configured to be attached to and detached from each other. The original roller 25 is immersed in varnish 27 stored in a trough-like varnish boat 26 and is supported by the left and right frames 28, and the metering roller 24 is attached to bearings at both ends of the original roller 25. Both ends are supported by a pair of pivoted arms. Then, the metering roller 24 is biased by a spring member and controlled by an adjustable stopper to maintain a predetermined contact pressure while the metering roller 24 is applied.
3, and is also pressed against the original roller 25 while maintaining a predetermined contact pressure by adjusting the eccentricity of the shaft end.

A rider roller 29 is supported by an arm and is in contact with the roller 23. The varnish 27 supplied to the varnish boat 26 by a supply device to be described later is pulled up by the base port 25 rotating in the direction of the arrow, and after the film thickness is adjusted by the metering roller 24, the varnish is transferred to the roller 23. Then, the coating is transferred from the roller 23 to the blanket cylinder 22, and then transferred to the blanket cylinder 22.
It is applied to the paper 13 passing between the roller 2 and the impression cylinder 11.

Varnishing roller group 22゜23 configured as shown below
．． 24, 25, 29 and the varnish boat 26 are attached with a cleaning device for these and a device for supplying varnish to the varnish boat 26. That is, on the side of the frame 8 of the varnished Schnitt 4, a closed tank 30 formed in an oblong rectangular shape is placed on a pedestal 31 with casters.
A varnish tank 3 is provided inside this tank 30 by a partition plate 32.
3 and a solution tank 34 are separated from each other. The outer wall of the tank 30 and the partition plate 32 are formed in double layers, and a heat insulating material is interposed inside the tank to block cold air from outside. Inside the varnish tank 33 and solution tank 34, there is a water-based varnish 35 and a water pipe 36.
Cleaning water 3T as a solvent supplied from the tank is stored respectively, and discharge ports 38 and 39 are provided at the bottoms of the various tanks 33 and 34 to discharge the varnish 35 and the cleaning water 3T to the outside of the tank. There is.

40 is a stirrer that stirs the varnish 35 by rotation, and 41 and 42 are pumps that pump up the varnish 35 and wash water 37, respectively, by rotation. Panel heaters 43 and 44 for heating the varnish 35 and the cleaning water 37 are attached to the bottom plates of the various types 33 and 34. On the other hand, a blanket cylinder cleaning device, generally designated by the reference numeral 45, is disposed near the circumferential surface of the blanket cylinder 22 on the upright side in the rotational direction.

This rubber body cleaning device 45 includes a gutter-shaped boat 46 and this boat 4.
The system consists of a sponge roller 41 that rotates within the roller 6 and is attached to and detached from the circumferential surface of the rubber cylinder 22 by hydraulic pressure, an Epo roller 48 that rotates in contact with the sponge roller 247, and a nozzle 49 below the sponge roller 247. , the nozzle 49 and the pump 42 are connected by a pipe 51 provided with a valve 5o. Further, the boat 46 is connected to a drainage groove on the floor surface by a hose 52α. Further, near the circumferential surface of the roller 23, a roller cleaning device, generally indicated by the reference numeral 52, is provided. The roller cleaning device 52 includes a plurality of nozzles 53, a doctor knife 54 whose cutting edge is detachably attached to the circumferential surface of the roller 23, and a gutter-like river 55. Each nozzle 53 is connected to the pump 42 by a pipe 5T provided with a valve 56. Further, a hose 58 connected to the boat 55 is led to a drainage groove on the floor.

Reference numeral 59 designates a supply hose that serves as a supply channel for selectively supplying the varnish 35 and wash water 3T in the tank 3o to the varnish boat 26, and is connected at one end to the varnish boat 26. , the other ends of which are branched near the tank 3o are connected to a pump 41 and a pump 42, respectively. An electromagnetic valve 60 is provided at a branch portion of the supply port 59 to switch the flow path between the pump 41, ie, the varnish tank 33 side, and the pump 42, ie, the solution tank 34 side. Further, the bottom of the varnish boat 26 and the varnish tank 33 of the tank 30 are connected by a discharge hose 61 as a discharge flow path, and from this discharge hose 61 a drain hose 62 as an outside tank discharge flow path is connected to the tank 30. The liquid is branched near the drain and led to the drainage groove on the floor. A solenoid valve 63 is provided at a branch portion of the discharge hose 61 to switch the flow path between the varnish tank 33 side and the drain groove side. Further, a valve 64 for opening and closing the discharge hose 61 is provided near the varnishing boat 26, and the upper part of the varnishing boat 26 and the discharge hose 61 are connected by an overflow hose 65.

The operation of the printed matter varnishing apparatus configured as above will be explained. Start the motor of the machine and feed the paper feed bag R2 to the difference plate 14.
When the paper 13 is fed upward one by one, the paper 13 is conveyed by changing the grip of the claw, and the blanket cylinder 8 is inserted into the cylinder.
Paper 13 is printed in four colors between blanket cylinder 8 and impression cylinder 9. When the paper 13 reaches the varnished Schnitt 4, the rubber cylinder 2
Since the varnish 2T is put into the cylinder, the varnish 2T in the varnish river 26 is pulled up by the original roller 25, and after the film thickness is determined by the metering roller 24, the varnish 2T is transferred to the blanket cylinder 22 via the roller 23. The transferred varnish 27 is held in the claws of the impression cylinder 11 and applied to the printed surface of the paper 13 passing between it and the blanket cylinder 22, and the varnished paper 13 is conveyed by the paper discharge chain 19. The paper is stacked on the paper stacking table 20. During such varnishing work, the pump 41 is rotating and the electromagnetic pulp 6o is switched to the pump 41 side, so the varnish 3 in the varnish tank 33 is
5 is pumped up by the pump 41 and supplied to the varnishing vessel 26 via the supply hose 59. Further, since the electromagnetic pulp 63 is switched to the varnish tank 33 side, when the varnish 27 in the varnish boat 26 exceeds a predetermined amount, it overflows and is returned to the varnish tank 33 through the overflow hose 65 and the discharge hose 61. Note that the pulp 64 is closed.

When performing cleaning work after finishing the varnishing work, the rubber cylinder 22 is removed from the coating roller 23 and the impression cylinder 11, and then the coating roller 23 is removed from the rubber by the attachment/detachment device for the coating roller 23. It is brought into contact with the body 22. At this time, since the landing roller 23 moves approximately around the axis of the metering row 224, the two openings 223 and 24 are not separated from each other. pulp 64
After opening the varnish 27 in the tennis boat 26 and returning the entire amount to the varnish tank 33, the pump 42 is rotated to open the pulp 50° 56, and the cleaning water 3T is pumped up by the pump 42 and passed through the piping 51.57. Since it is guided to nozzle 49.53,
The cleaning water 31 is injected from the nozzles 49 and 53, and the metering roller 24 and the original roller 25, which are rotating in opposition to the coating roller 223, the blanket cylinder 22, and the coating roller 23, are cleaned. Dissolved varnish with doctor knife 54 and sponge roller 24
7 into the boat 55, 46, and is discharged together with the cleaning water through the hoses 58 and 52a to the drainage groove.

When the electromagnetic pulp 60 is switched to the pump 42 side and the electromagnetic pulp 63 is switched to the drain hose 62 side at the same time as cleaning the rollers, the cleaning water 3T passes through the supply hose 59 and is supplied to the varnishing boat 26 to clean the interior of the varnishing boat 26. and water after washing #
'i It passes through the discharge hose 61 and the drain hose 62 and is discharged to the drainage groove. Since the cleaning water 3T circulates in this way, the inside of the varnish boat 26 is cleaned, and at the same time, the varnish inside the supply hose 59 and the discharge hose 61 is also washed away. In the cleaning operation, the cleaning water 37 is applied to the panel heater 44.
Since the varnish is heated in advance by the varnish, even if the varnish on the circumferential surface of each roller, in the varnish boat 26, and in the hose 59, 61 is about to solidify, it is completely dissolved and cleaned. In addition, switching of electromagnetic pulp 60.63 etc. and pump 41.42
It is an easy technology to automate the rotation and stop timing of the varnish, and by automating this, it is possible to switch from varnish supply work to cleaning work immediately after varnishing work is completed.
During this time, the artist can engage in other work.

In this embodiment, an example is shown in which the electromagnetic pulp 60 is provided at VCi branch portions of the supply hose 59, but each pump 41
．． One piece may be provided for every 42. In addition, in this embodiment, the pumps 41 and 42, which are provided one each for the varnish tank 33 and the solution tank 34, are replaced with only one pump and the varnish tank 33.
, a cylinder in which electromagnetic pulp is provided between each of the solution tank 34,
Alternatively, one pump and an electromagnetic pulp may be provided between the branch and the varnish boat 26. Further, in this embodiment, one electromagnetic pulp 63 is provided at the branch part of the discharge hose 61, but it is also possible to provide one each at the branch part, inside the varnish tank, and between the branch part and the drain girder. good.

Further, each flow path does not need to be a hose 59.6L62, but may be a metal pipe or a plastic pipe.

〔Effect of the invention〕

As is clear from the above description, in the apparatus for varnishing printed matter according to the present invention, a tank consisting of a varnish tank and a solvent tank equipped with a pump and a heating means, and a varnish boat for varnishing are connected to a pulp varnishing apparatus. A supply flow path and a discharge flow path are connected to each other, and the varnish can be selectively supplied to the varnish boat and the varnish can be cleaned by operating the pump and switching the pulp. This not only makes it possible to supply varnish smoothly during varnishing work, but also to clean and supply the inside of the varnish track in parallel with cleaning the rollers when cleaning the varnishing equipment.

Since both discharge channels can be cleaned at the same time without having to do it manually, work efficiency is significantly improved and labor is reduced.Also, since the solvent is heated by the heating means, even varnish that has barely solidified can be dissolved. This makes it possible to perform a complete cleaning operation, improve the quality of varnished printed matter when restarting operations, and prevent clogging of flow channels. Additionally, by automating processes such as switching pulp and starting pumps, workers can be redirected to other tasks during cleaning.
Work efficiency improves.

[Brief explanation of drawings]

1 to 3 show an embodiment of the printed matter varnishing apparatus according to the present invention, FIG. 1 is a schematic side view of a four-color sheet-fed rotary printing press in which this is implemented, and FIG. FIG. 3 is a schematic side view of the printing unit and the varnish coating device, and FIG. 3 is a schematic configuration diagram of the varnish coating device. 21...varnish coating device, 30...φ tank, 33
...Varnish tank, 34...Solution tank, 41.42...
... Pump, 43.44 ... Hanel heater, 59.
...Supply hose, 60°63...Electromagnetic pulp, 6
1...Drain hose, 62...φ drain hose. Patent applicant: Komori Printing Machinery Co., Ltd. Agent: Kazuha Yamakawa (1 person)

Claims (1)

[Claims] A tank with a pump for pumping up varnish and solvent and a heating means, and a tank with a varnish tank and a varnish tank.
a varnish/solvent supply channel and a varnish/solvent discharge channel that connect the varnish tank of the section; a valve that switches the supply channel to the varnish tank and the solvent tank; and a valve that switches the supply channel to the varnish tank and the solvent tank; A device for varnishing printed matter, characterized in that it is equipped with a varnish supply and varnish boat cleaning device that is equipped with a varnish tank and a pulp that is switched to an outside tank discharge flow path that branches in the middle of the flow path.