JP3052861U - Ink temperature control device for printing press - Google Patents

Abstract

(57) Abstract: To control the temperature of ink supplied to an ink roller in a printing press to maintain a stable print quality from the start of printing to the end of printing. SOLUTION: This is a device for controlling an ink temperature in an ink fountain 1 in a printing press, and detects a heater 3 provided on a bottom surface of an ink container in the ink fountain and a temperature of the ink stored in the ink fountain. And a controller 5 for controlling and operating the heater based on the ink temperature detected by the ink temperature sensor. According to a preferred embodiment, a support plate (7) and a thin film-like foil (8) are provided on the ink fountain so as to be inclined downward toward the ink source roller 2, and the space on the foil is filled with ink. A plate heater in which the heater is sandwiched between a support plate and a foil, wherein the heater is a storage part;
It is provided as.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an ink fountain temperature control device in a printing press.

[0002]

[Prior art]

 Generally, in a lithographic printing press, ink and fountain solution are supplied to the lithographic surface via rollers. A printing plate provided with a lipophilic region and a hydrophilic region formed according to a desired image to be printed on paper or other printing medium is attached to a rotating plate cylinder. Oil-based ink adheres to the lipophilic area to form a printing area, and the dampening solution adhering to the hydrophilic area repels the ink and forms a non-printing area.

[0003] Ink is supplied from an ink fountain to an ink setting roller via an ink discharge roller and an ink transfer roller, and dampening water is supplied from a watercraft to a water setting roller via a water discharge roller and a water transfer roller. .

In order to improve the printing quality, ink and dampening water are applied to the printing plate in an appropriate balance, and the ink is applied only to the printing region (oleophilic region) of the printing plate. Care must be taken to prevent ink from adhering to non-printing areas (hydrophilic areas). For this reason, it is required to maintain the ink temperature within a predetermined temperature range from the start of printing to the end of printing. If the ink temperature deviates from the specified temperature range, its important properties such as viscosity, fluidity, and transferability will fluctuate, making it difficult for the printing plate to adhere to the printing area, or exceeding the printing area to the non-printing area. , Causing print quality to be greatly impaired.

[0005]

[Problems to be solved by the invention]

 In order to achieve the above object, it has been proposed and put to practical use to control the temperature of an ink roller by circulating water or oil whose temperature is controlled through the ink roller in a printing press (for example, Japanese Patent Application Laid-Open No. 7-47661). However, in order to maintain a stable print quality from the start of printing to the end of printing, it is necessary to further control the temperature of the ink supplied to the ink roller.

[0006]

[Means for Solving the Problems]

 The present invention was conceived after diligent efforts to achieve the above-mentioned solution, and as a solution, a device for controlling the ink temperature in the ink fountain in a printing machine, A heater provided on the bottom of the ink storage unit, an ink temperature sensor that detects the temperature of the ink stored in the ink fountain, and a controller that controls and operates the heater based on the ink temperature detected by the ink temperature sensor. The present invention provides an ink fountain temperature control device for a printing press, comprising:

According to a preferred aspect of the present invention, a support plate and a thin film-shaped foil are provided on the ink fountain so as to be inclined downward toward the ink source roller, and a space on the foil is provided with ink. In the housing, the heater is provided as a plate heater sandwiched between a support plate and a foil.

[0008]

[Embodiment of the invention]

 FIG. 12 shows an example of the configuration of the ink fountain temperature control device according to the present invention, in which the ink in the ink fountain 1 is controlled to a predetermined temperature and supplied from an ink source roller (ink discharge roller) 2. The apparatus includes a heater 3 provided at the bottom of the ink container of the ink fountain 1, an ink temperature sensor 4 for detecting the temperature of the ink stored in the ink fountain 1, and an ink temperature detected by the ink temperature sensor 4. And a controller 5 for controlling and operating the heater 3 on the basis of.

As shown in FIG. 2, the ink fountain 1 is provided on an ink fountain main body 6 such that a support plate 7 and a thin film foil 8 are inclined downward toward the ink source roller 2. The upper space is an ink storage 9 for storing the ink 10. In this embodiment, the heater 3 is shown as a heating plate (plate heater) 11 sandwiched between the support plate 7 and the foil 8 (see FIG. 3). The heating plate 11 generates heat by passing electricity, and thereby the ink 10 placed on the foil 8 is heated.

According to the ink fountain temperature control device of the present invention configured as described above, the temperature of the ink 10 is detected by the ink temperature sensor 4, and the detection result is sent to the controller 5 as an electric signal. The controller 5 has a built-in setting means (not shown) for setting a predetermined temperature of the ink, compares the temperature measured by the ink temperature sensor 4 with the temperature set by the setting means, and based on the result, The power supply to the heater 3 (heating plate 11) is controlled. Thus, the ink 10 in the ink fountain 1 is always maintained at the predetermined set temperature.

In the case of a multi-color printing press, it is desirable to install a temperature control device according to the present invention for each ink fountain of each color, set an optimum temperature for each color ink, and individually control the temperature.

In addition, by using a conventionally known temperature control device for an ink roller and the temperature control device of the present invention, more stable printing quality can be maintained for a long time.

[0013]

[Effect of the invention]

 According to the present invention, the temperature of the ink supplied to the ink roller of the printing press is controlled to an optimum temperature for the ink, so that the ink has a predetermined viscosity, and the ink is applied only to the printing area of the printing plate. To make clear printing without bleeding.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view illustrating a configuration of an ink fountain temperature control device according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing details of an ink fountain part of the apparatus.

FIG. 3 is a partially broken plan view showing an arrangement state of a heater in the apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ink fountain 2 Ink base roller 3 Heater 4 Ink temperature sensor 5 Controller 6 Ink fountain main body 7 Support plate 8 Foil 9 Ink ink 10 Ink 11 Heating plate (plate electric heater)

Claims (2)

[Utility model registration claims] An apparatus for controlling the temperature of ink in an ink fountain in a printing press, comprising: a heater provided on a bottom surface of an ink fountain in the ink fountain; and a temperature of the ink stored in the ink fountain. An ink temperature sensor,
A controller for controlling and operating the heater based on the ink temperature detected by the ink temperature sensor. 2. A method according to claim 1, wherein a support plate and a thin film-like foil are provided on the ink fountain so as to be inclined downward toward the ink source roller, and a space on the foil is used as an ink container. 2. The ink fountain temperature control device according to claim 1, wherein the heater is provided as a plate electric heater sandwiched between the support plate and the foil.