JPH11138758A - Temperature controller for printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature controller for a printer for improving an operating efficiency by reducing a capacity of a contract demand for an economic advantage, shortening a warming up time, and shortening a preparing time before starting a printing operation. SOLUTION: The temperature controller for a printer comprises a parallel mode settable to simultaneously temperature control all a plurality of printing units IC to 5C by applying power of a power source 1 to all of a plurality of temperature regulators 1C' to 5C' respectively equipped correspondingly with the plurality of the units 1C to 5C, a sequential mode settable to sequentially temperature control the plurality of the units by sequentially applying power of the power source to the plurality of the regulators 1C' to 5C', and a mode changeover switch 7 for selectively switching the parallel mode or the sequential mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for printing ink on an ink roller by passing a temperature control medium through ink rollers in a plurality of printing units constituting a printing machine and controlling the temperature of the temperature control medium. The present invention relates to a temperature control device for a printing press that controls the temperature of a printing press.

[0002]

2. Description of the Related Art Conventionally, inks used in printing presses often have a high viscosity, and as a characteristic of the general properties of a substance having such a high viscosity, the viscosity varies depending on the temperature. Is mentioned. That is, the lower the temperature, the higher the viscosity, and the viscosity decreases as the temperature increases. Therefore, immediately after the start of printing, when the temperature of the ink roller is low, the ink viscosity is high, and the ink density of the printed matter is high. When the temperature of the ink roller rises due to friction between the ink rollers and the like with the elapse of the operation time of the printing press, the ink viscosity decreases and the ink density of the printed matter also decreases.

[0005] Although the above-mentioned problem is simply raised, ink is actually transferred from the ink forming roller 20 to the plate cylinder 21 (see FIG. 6), and from the plate cylinder to the blanket cylinder, and further to the blanket cylinder. In transferring the ink from the cylinder to the paper surface, if an appropriate ink viscosity is not obtained, a state where transfer is not sufficiently performed, that is, a print quality defect such as print unevenness may be caused.

[0004] Further, when an appropriate ink viscosity is not obtained, a picture composed of halftone dots causes adverse effects such as crushing or bleeding, which hinders obtaining good print quality. For this reason, in the conventional printing press, in order to guarantee high print quality, the ink source roller A, the ink transfer roller C ₁ , the relay roller K ₁ ,
A plurality of ink rollers 30 comprising K _2, etc. The surface temperature of the (see FIG. 6) and regulated by the temperature clause system as shown in FIG. 5 so as to manage. In FIG. 5, 22
Is a printing unit composed of five printing units 1C to 5C constituting a printing machine, and 23 corresponds to these printing units 1C to 5C for controlling the temperature of the ink roller 30 in each of the printing units 1C to 5C. Temperature control device comprising temperature control devices 1C 'to 5C'
Reference numeral 4 denotes a temperature control device for controlling the temperature control devices 1C 'to 5C', respectively, and 25 denotes a printing unit 1C to 5C '.
Each of the temperature control devices 1C 'to 5C' is attached to the middle ink roller 30.
, A cooling device for circulating a temperature controlling medium through the cooling device, a cooling device for sending cooling water to each of the temperature controlling devices 1C 'to 5C' to cool each ink roller 30, and a cooling medium for the cooling device 26 Channel.

FIG. 6 shows a general configuration of a temperature control system. In FIG. 6, reference numeral 31 denotes one of a plurality of printing units 1C to 5C constituting a printing press. As shown in FIG.
1, a plurality of ink rollers in the ink roller group, ie, an ink source roller A, an ink delivery roller C ₁ ,
Water is passed through the medium rollers 25 as a temperature adjusting medium to the relay rollers K ₁ and K ₂ , and the temperature of the water is adjusted so that each of the ink rollers 30 (A, C ₁ and K 2).
₁ , K ₂ ) is maintained and adjusted to a predetermined temperature. Specifically, as shown in FIG. 7, the water that has passed through each of the ink rollers 30 is sent to a temperature control device (heating device) 23, and from the cooling device 26 to the temperature control device 23 via a cooling medium flow path 27. Cooling with supplied cooling medium (or heating with heating device in temperature control device 1C'-5C ')
It is configured to be. And the temperature control device 24
Temperature control device (heating device) 2 based on the control signal from
3, the water is cooled and heated, and the temperature of the water is adjusted and managed to maintain and adjust the temperature of each ink roller 30 to a predetermined temperature.

[0006] Each printing unit 31 (1C to 5C)
Is equipped with a temperature control device 23. Conventionally, the temperature control device 14 simultaneously activates all of the temperature control devices 23 and simultaneously activates all of the plurality of printing units 31 constituting the printing press. I try to make it.

[0007]

However, in the conventional temperature control system, one printing unit 1C
イ ン キ 5C, a plurality of ink rollers 30 (A, C
_1, K _1, K _2), respectively provided a heater (heating device) with respect to a plurality of printing units constituting the printer 1C~5
Since all of C are heated at the same time, a large amount of power is supplied to the heater when the temperature is adjusted before printing is started. Therefore, at the time of the power contract,
A contract must be made with the total capacity of those heaters. However, once the medium once reaches the predetermined temperature, it is only necessary to supply power for maintaining the temperature to the heater, and this heater power is significantly smaller than the power required for warm-up before starting printing. In view of the fact that the contract power is sufficient, the large contract power as described above is extremely uneconomical. In addition, when the printing press is updated, the power contract as described above must be made again, and there is a disadvantage that extra work is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to reduce the contracted power capacity, which is economically advantageous, and can reduce the warm-up time. Accordingly, it is an object of the present invention to provide a temperature control device for a printing press that can shorten the preparation time before the start of a printing operation and can improve the operation efficiency.

[0009]

In order to achieve the above-mentioned object, according to the present invention, a temperature control medium is passed through ink rollers in a plurality of printing units constituting a printing machine, and the temperature control medium is provided. In a temperature control device of a printing press, wherein the temperature of the ink on the ink roller is controlled by adjusting the temperature with a temperature control device, a plurality of temperature controls provided corresponding to the plurality of printing units, respectively. A parallel mode in which power is supplied to all of the apparatuses and temperature control of all of the plurality of printing units is performed simultaneously, and a power supply is sequentially supplied to the plurality of temperature control apparatuses to sequentially control the temperature of the plurality of printing units. In addition to being configured to be able to be set to a sequential mode, a mode switching switch for selectively switching to either the parallel mode or the sequential mode is provided. The are to be provided.

Further, in the present invention, a temperature adjusting medium is passed through ink rollers in a plurality of printing units constituting a printing machine, and the temperature of the temperature adjusting medium is adjusted by a temperature adjusting device. In a temperature control device of a printing press configured to control the temperature of the above ink, it is possible to set only a sequential mode in which power is sequentially applied to the plurality of temperature control devices and the plurality of printing units are sequentially controlled in temperature. It is composed.

Further, according to the present invention, the power supply to each temperature control device in the sequential mode is turned on based on an algorithm.

Power supply to each of the temperature control devices in the sequential mode is performed by sequentially supplying a power supply to the plurality of temperature control devices and sequentially energizing the heaters of the plurality of temperature control devices. I do it.

A preferred embodiment of the present invention is as follows. In a temperature control device of a printing press provided with a temperature control heater for controlling the temperature of a large number of rollers of each printing unit in accordance with the number of colors constituted by the printing press, (1) the heater of each printing unit is simultaneously A mode switch is provided for setting two control modes, a parallel mode for energizing and controlling simultaneously, and a sequential mode for sequentially energizing and controlling each heater sequentially, and switching between these two modes. And an algorithm for controlling the sequential energization in the sequential mode. (2) In some cases, only the sequential mode is provided.

[0014]

FIG. 1 shows an example of a temperature control device for a printing press according to the present invention. Note that, in order to limit the description of the present invention to temperature control by heating, the illustration of the cooling device is omitted in FIG.

The printing press 1 of this embodiment has five printing units 2 from 1C to 5C, and each printing unit 2 has a temperature controller 3. The above-mentioned temperature adjusting device 3 is a device for adjusting the temperature of a predetermined ink roller (such as the above-described in-roller 30) in each printing unit 2, and as shown in FIG. The medium (water) passed through a predetermined ink roller in the inside of each of the temperature control devices 1C ′ to 5C
The medium which has been introduced into C ′ and temperature-controlled by the temperature control device 3 is circulated to a predetermined ink roller (for example, an ink source roller) in each printing unit 2. I have.

The temperature control device 4 is a device for sending a control signal to each of the temperature control devices 3 to control the temperature control of the medium. An algorithm for performing the energization control) stored in advance and operating based on the algorithm;
And a manually operated mode changeover switch 7 for selectively switching the operation mode between the parallel mode and the sequential mode. Note that the parallel mode is a mode in which power is turned on to all of the plurality of temperature controllers provided for the plurality of printing units, respectively, and all the plurality of printing units are simultaneously temperature-controlled. The sequential mode is a mode in which power is sequentially supplied to a plurality of temperature control devices to sequentially control the temperature of a plurality of printing units.

Here, the printing press 1 has five printing units 2
The parallel mode and the sequential mode will be specifically described below, taking the case of the configuration as an example. First, FIG. 2 schematically shows a parallel mode set when the movable terminal 7a of the mode changeover switch 7 is switched to the parallel mode terminal (one fixed terminal) 7b. For this parallel mode,
Five heating devices 9 corresponding to each of the five printing units 2 are provided, and each heating device 9 includes a plurality of heaters 8.
It has. Each of these heating devices 9 is separately provided with a power source 10 of one system. When the power source 10 is set to the parallel mode, the power sources 10 are respectively supplied to the heating devices 9 of the temperature control device 3, These power supplies 1
From 0, electric power is simultaneously supplied to the heaters 8 of the respective heating devices 9. Thus, in the parallel mode, all of the printing units 2 are in the temperature adjustment state, and all of the predetermined ink rollers in the printing unit 2 are simultaneously temperature-controlled.

The movable terminal 7a of the mode changeover switch 7 is a sequential mode terminal (the other fixed terminal).
FIG. 3 schematically shows the sequential mode set when the mode is switched to 7c. In this sequential mode, only one system (single) power source S is prepared as shown in FIG. 3, and in the temperature control device 4, each printing unit is 1C → 2C → 3C
→ 4C → 5C → 1C..., Etc., are sequentially switched, and the power source S is sequentially switched to the heating devices 1H to 5H.
And electric power is alternatively supplied to these heating devices 1H to 5H. The above-described switching operation in the sequential mode is performed based on an algorithm stored in the controller 6 in advance.

Next, FIG. 4 shows a comparison of the required power capacity between the parallel mode and the sequential mode over time. Compared to the parallel mode, the sequential mode requires only 1/5 of the required power capacity at the start of warm-up, but requires about 5 times the warm-up time. If the number of printing press units is n (n
Is an integer), the required power capacity in the sequential mode is 1 / n of the parallel mode,
It can be easily inferred that the warm-up time becomes n times.

In the sequential mode, the required power capacity is as shown in the following equation as compared with the parallel mode. (Required power in sequential mode) = (Required power in parallel mode) / (Number of printing units) On the other hand, the time required for warm-up is represented by the following equation. (Warm-up time in sequential mode) ≧ (Warm-up time in parallel mode) × (Number of printing units)

When the power capacity is sufficient, the warm-up time can be shortened by selecting the parallel mode with the mode changeover switch 7. In the sequential mode, by using a timer together and supplying power to the heating devices 1H to 5H before the start of operation, the length of the warm-up time can be prevented from being a problem.

When the capacity of the power supplies 1S to 5S is not sufficient for the parallel mode and there is sufficient capacity for the heating device for two or more printing units, the printing units 1C and 2C → The printing units 3C and 4C → the printing units 5C and 1C →... Can be used in combination with the parallel mode and the sequential mode to shorten the warm-up time. Such a switching operation can be performed based on an algorithm stored in the controller 6 in advance.

In the above-described embodiment, both the parallel mode and the sequential mode are provided, and one of these modes can be selected. However, only the sequential mode can be provided. In this case, the temperature controller 3 can be operated with low power even in an environment where the large power required for operation in the parallel mode cannot be obtained.

Although the embodiments of the present invention have been described, the present invention is not limited to these embodiments, and various modifications and changes can be made based on the technical idea of the present invention. For example, the switching operation of the mode switching switch 7 can be automatic switching by the controller 6 without manual operation. In this case, by the operation of the controller 6, the parallel mode is automatically set from the time when the warm-up start switch of the printing press is switched to the ON state, and thereafter, when the temperature of the ink roller reaches a predetermined value. The mode change switch 7 may be configured to automatically switch to the sequential mode.

[0025]

According to the first aspect of the present invention, the power supply is turned on to all of the plurality of temperature control devices provided corresponding to the plurality of printing units, respectively, so that all of the plurality of printing units are simultaneously heated. A controllable parallel mode and a sequential mode in which power is sequentially applied to the plurality of temperature control devices to sequentially control the temperature of the plurality of printing units can be set, and any one of the parallel mode and the sequential mode can be set. Since the mode changeover switch for selectively switching the temperature is provided, if the capacity of the power supply is small, the sequential mode is used, so that the temperature control device can be operated even with a low power supply. As a result, the contract power capacity can be reduced, which is economically advantageous. When the power supply capacity is sufficiently large, selecting the parallel mode can shorten the warm-up time and shorten the preparation time before the start of the work, thereby improving the work efficiency. it can.

According to a second aspect of the present invention, a temperature adjusting medium is passed through ink rollers in a plurality of printing units constituting a printing machine, and the temperature of the temperature adjusting medium is adjusted by a temperature adjusting device. In the temperature control device of the printing press, wherein the temperature of the ink on the ink roller is controlled by sequentially turning on the power to the plurality of temperature control devices, the temperature of the plurality of printing units is sequentially controlled. Since the configuration is such that it can be set to only the sequential mode, operation with low power is possible. Furthermore, when the contract power amount is small, the power can be satisfactorily put into practical use by appropriate operation procedures such as early preparation without overpowering by mistake. Can be provided.

According to the third aspect of the present invention, since the power supply to each of the super-high temperature devices in the sequential mode is performed based on an algorithm, the power supply is switched. It is possible to automatically perform the control in a preset order and timing, and it is possible to reliably perform the optimal energization control according to the magnitude of the power supply capacity.

According to a fourth aspect of the present invention, the power supply to each of the temperature control devices in the sequential mode is performed by sequentially supplying one system of power to the plurality of temperature control devices. Since the heaters of the temperature control devices are sequentially energized, a single power supply can be used for the heaters of each temperature control device, and a single power supply can be used. .

[Brief description of the drawings]

FIG. 1 is a system structural diagram of a temperature adjusting device of a printing press according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a state where the above-described temperature control device is switched to a parallel mode.

FIG. 3 is a schematic diagram showing a state where the above-described temperature control device is switched to a sequential mode.

FIG. 4 is a time chart for comparing required power in two modes (parallel mode and sequential mode) in the present invention.

FIG. 5 is a system configuration diagram showing a conventional temperature control device of a rotary printing press.

FIG. 6 is a configuration diagram illustrating an example of an ink roller on which temperature adjustment control is performed.

FIG. 7 is a configuration diagram showing one of printing units constituting a conventional rotary printing press.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printing machine 2 Printing unit 3 Temperature controller 4 Temperature controller 5 Medium flow path 6 Controller 7 Mode switch 8 Heater 9 Heater 1C-5C Printing unit 1C'-5C 'Temperature controller 1S-5S Power supply S Power supply 1H- 5H heating device

Claims (4)

[Claims] 1. A temperature control medium is passed through ink rollers in a plurality of printing units constituting a printing machine, and the temperature of the temperature control medium is adjusted by a temperature control device, whereby ink on the ink rollers is controlled. In a temperature control device of a printing press adapted to control the temperature, in a temperature control device of a printing press, power is supplied to all of the plurality of temperature control devices provided in correspondence with the plurality of printing units, and all of the plurality of printing units are simultaneously turned on. A parallel mode for controlling the temperature, and a sequential mode for sequentially controlling the temperature of the plurality of printing units by sequentially turning on the power to the plurality of temperature control devices, and the parallel mode and the sequential mode can be set. A temperature control device for a printing press, comprising a mode changeover switch for selectively switching any one of the modes. 2. A method in which a temperature adjusting medium is passed through ink rollers in a plurality of printing units constituting a printing machine, and the temperature of the temperature adjusting medium is adjusted by a temperature adjusting device, whereby ink on the ink rollers is adjusted. In a temperature control device of a printing press adapted to control a temperature, a power supply may be sequentially applied to the plurality of temperature control devices so that the plurality of printing units can be set to only a sequential mode for sequentially controlling the temperature. A temperature control device for a printing press. 3. The temperature control device for a printing press according to claim 1, wherein the power supply to each of the temperature control devices in the sequential mode is performed based on an algorithm. 4. The power supply to each of the temperature control devices in the sequential mode is performed by sequentially supplying a power supply to the plurality of temperature control devices and sequentially energizing the heaters of the plurality of temperature control devices. The temperature control device for a printing press according to any one of claims 1 to 3, wherein the temperature control is performed.