JPH07117316B2 - Cylinder or roller that is heated or cooled using an electronic cooling / heating element and its heating / cooling system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink roller of a printing machine, a cylinder such as an impression cylinder and a blanket cylinder, or a cylinder and a roller of a plastic film processing machine and a paper machine, and more particularly to an electronic device that produces cold heat by the Peltier effect. The present invention relates to a cylinder and a roller heated or cooled by using a cooling / heating element, and a heating / cooling system thereof.

[0002]

2. Description of the Related Art Cylinders of the above-mentioned various machines are used that rotate in contact with each other. For example, a plurality of ink rollers of a printing machine are arranged between an ink reservoir and a plate cylinder.
The ink is sequentially transferred to the surface of the adjacent roller by the rotary contact, and is applied to the plate of the plate cylinder. Rolling friction occurs when such a roller rotates while making contact, and the temperature of the ink on the roller rises due to the frictional heat. The ink specifications define the usage environment such as the optimum temperature and temperature range. For example, in the case of offset printing, generally the ink temperature is the optimum temperature 25 ⁰ before and after. Therefore, if the surface temperature of the ink roller deviates from the environment in which the ink is used due to the above-mentioned rolling friction, it becomes a factor that deteriorates the printing quality. Especially in cold regions, when the room temperature is low,
At the beginning of work, it is necessary to idle the printing machine until the temperature of the ink reaches an appropriate temperature, which reduces work efficiency.

Against this background, a roller cooling / heating technique has been developed for suppressing an increase in the surface temperature of the roller to attain an appropriate temperature. Roller cooling of conventional printing machines is performed by various methods such as a water cooling type in which water such as ground water is circulated in the rollers, a refrigeration cycle type in which heat is exchanged with cooling water or refrigerant flowing in the rollers, and a heat pipe type. It is being appreciated. For example, as shown in FIG. 10, the water-cooled type is configured to jet water into the rollers to cool them. That is, on the water supply side, a pipe (nozzle) 101 for ejecting water into the roller 100 is provided so as to penetrate one roller shaft and extend into the roller. This pipe 101 is connected to a water supply pipe 103 via a rotary joint 102.
Further, on the drain side, a drain pipe 105 connected to a drain hole provided in another shaft via a rotary joint 104 is provided. A cylinder cooling device using a refrigeration cycle system is disclosed in, for example, Japanese Patent Application Laid-Open No. 63-5944.

[0004]

By the way, the conventional cylinder cooling device has to have a closed cylinder structure because a liquid medium is used, which requires high-precision machining, and also water circulation equipment and freezing. There are drawbacks such as the need for equipment and the enlargement of the device. Further, the surface temperature distribution of the cylinder shows different values in the central part and the peripheral part near the end face of the cylinder. Usually, the surface temperature of the cylinder has a gradient in natural heat radiation and is not necessarily uniform, and the heat input / cooling side is low and the heat exhausting side is high even in the cylinder, which is not uniform. Therefore, methods such as circulating a large amount of water and lowering the cooling water temperature have been adopted, but these methods have a problem that it is not possible to easily manage the cylinder surface at an appropriate temperature and uniformly. .

An object of the present invention is to provide a cylinder or roller which is heated or cooled by using an electronic cooling element based on the Peltier effect. Another purpose is
(EN) A heating / cooling system for a cylinder or roller in which the surfaces of the cylinder and the roller to be heated or cooled by using an electronic cooling / heating element have a uniform and proper temperature distribution. Yet another object is to provide a cooling or warming device for electronic cooling elements for cylinders and rollers.

[0006]

In order to achieve the above object, a cylinder or roller according to the invention of claim 1 is provided with a plurality of electronic cooling elements by the Peltier effect on a hollow inner surface, and the electronic cooling elements are partially provided. It is arranged so as to sparsely and densely correspond to a site where heat generation or cooling occurs, and is configured to obtain a uniform surface temperature distribution. In the cylinder or roller according to the invention of claim 2, a plurality of electronic cooling / heating elements by the Peltier effect are provided on the inner surface of the hollow, and the electronic cooling / heating elements are divided into a plurality of groups in the axial direction and / or the circumferential direction, and each group is divided into groups. It is configured to be current controlled. Another invention is characterized by the following configuration in the invention of claim 1 or 2. (1) A fan for air-cooling or heating an electronic cooling element is provided, a rotor of the fan is attached to a cylinder or roller, and air is blown by rotation of the cylinder or roller. (2) The cold heat radiation layer is formed on the inner surface of the cylinder or the roller, and the electronic cold heat element is closely attached to the cold heat radiation layer.

According to a fifth aspect of the present invention, there is provided a heating / cooling system for a cylinder or roller, comprising a plurality of electronic cooling / heating elements arranged by Peltier effect on the inner surface of the cylinder or roller, and a sensor for detecting the surface temperature of the cylinder or roller. And means for controlling the electric current of the electronic cooling / heating element by the output of the sensor. According to a sixth aspect of the present invention, there is provided a cylinder or roller heating / cooling system in which a plurality of electronic cooling / heating elements arranged on the inner surface of the cylinder or roller are divided into a plurality of groups, and the surface temperature of the cylinder or roller corresponding to each group is detected. The sensor and the means for controlling the current of the electronic cooling / heating element of each group by the output of each sensor are provided. Another invention is characterized in the following configuration in the invention of claim 5 described above. (1) The current control means is configured to control the magnitude and the direction of the current supplied to the electronic cooling / heating element to serve as a cooling heat source or a heating heat source. (2) Providing blowing means in the cylinder or roller,
A cooler or a warmer air is blown from the means toward the electronic cooling / heating element to cool or heat the electronic cooling / heating element. Preferably, cold air or warm air is used as normal room air.

[0008]

When a current is applied to the electronic cooling element, cold heat is applied to the inner surface of the cylinder or roller to cool the cylinder or roller warmed by the rolling frictional heat, so that the surface temperature rise of the cylinder or roller is suppressed. At this time, by controlling the cooling / heating energy by controlling the current to the electronic cooling / heating element, the surface temperature of the cylinder or the roller is maintained at a uniform and appropriate value. By arranging electronic cooling and heating elements in a dense and dense manner according to the surface temperature distribution of the cylinder or roller, when the same current is applied, more cooling and heat energy is generated in the parts with large element density, that is, the inner surface of the cylinder or roller where the surface temperature rises. Given. Further, a plurality of rows of electronic cooling / heating elements are set as one group, and the cooling / heating energy applied to a predetermined range of the cylinder or the roller can be adjusted by controlling the current for each group.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a structure of a cylinder or roller (hereinafter collectively referred to as “cylinder”) that is reversibly heated or cooled by using an electronic cooling element. It should be noted that either a heating or cooling cylinder can be constructed by changing the direction of the current to the electronic cooling element. Therefore, in this embodiment, since the basic structure of the cylinder is the same, only the cooling cylinder will be described. The cylinder 1 has a hollow structure with both ends open.
The end of the cylinder, as shown in FIG.
A support member 1 for supporting a cylinder shaft 4 pivotally supported by 2
a and 1b are provided. A plurality of electronic cooling / heating elements 2 are arranged on the inner surface of the cylinder 1. The electronic cooling / heating element 2 is air-cooled by a blower fan 3 attached to one cylinder shaft. The blower fan 3 constitutes an axial fan,
A structure that uses the rotation of the cylinder 1 or a structure that uses a power source such as a motor is selected because it produces a blowing effect in the axial direction of the cylinder. When the rotation of the cylinder 1 is used, the blower fan 3 is provided with a fan casing 20 fixed to a frame 22 by a mounting bracket 21, and is arranged so that the outlet of the fan casing coincides with one open end of the cylinder 1. To be done.

The electronic heating / cooling element 2 has a cooling side in close contact with the inner surface of the cylinder and a finned radiator 5 provided on the radiating side. A heat insulating material 6 is laid between the respective elements to prevent cold heat radiation from the inner surface of the cylinder which does not contribute to cooling. As shown in FIG. 2, a plurality of electronic cooling / heating elements 2 are arranged in the circumferential direction (one row) and a plurality of rows are arranged in the axial direction. Next, the cooling action of the cylinder will be described. When the electronic cooling device 2 is energized via the slip ring 7, cold heat is applied to the inner surface of the cylinder, the cylinder warmed by the rolling friction heat is cooled, and an increase in the surface temperature of the cylinder is suppressed. At this time, the cooling energy is adjusted by controlling the current to the electronic cooling element 2, and the surface temperature of the cylinder is maintained at an appropriate value.

Next, a structure for making the surface temperature distribution of the cylinder uniform will be described. The electronic cooling / heating elements 2 are arranged densely and densely according to the surface temperature distribution of the cylinder. For example, the exhaust side of FIG. 1 has a higher surface temperature than the blower fan 3 side. Therefore, as shown in FIG. 5, the number of electronic cooling elements 2 is increased on the downstream side of the flow of the cooling air to increase the element density, and conversely the upstream side is decreased. By arranging in this way, when the same current is applied to the electronic cooling element 2, more cooling heat energy is given to a portion where the element density is high, that is, the inner surface of the cylinder where the surface temperature becomes high, and the surface temperature of the entire cylinder is made uniform. And it can be set to an appropriate value.

Further, as shown in FIG. 8, a plurality of rows are set as one group, for example, the blower fan side is divided into the A group, the center is divided into the B group and the exhaust side is divided into the C group, and the current is controlled for each group to cool and cool energy. Adjust. Thereby, it is possible to perform fine cooling in accordance with the surface temperature distribution of the cylinder. When temperature control is performed with higher accuracy, the cylinder surface temperature of each group is detected by the temperature sensors S1, S2, S3, and the current is controlled by the difference between the detected temperature and the set temperature. FIG. 9 shows a block for performing current control for each group based on the detected cylinder surface temperature. The controller outputs a heating or cooling command and a temperature command to the current control circuit based on the difference between the cylinder surface temperature and the set temperature for each group obtained from the output of each sensor. The current control circuit supplies a current having a magnitude and direction necessary for heating or cooling according to the temperature command to the electronic cooling / heating elements of each group.

Although the electronic cooling element 2 is air-cooled in the above-described embodiment, as shown in FIG. 6, a blower pipe 9 is provided to blow cold or warm air from the cooler 8 into the cylinder. (Or nozzle) 10 is blown toward electronic cooling element 2, and this exhaust heat is exhausted by exhaust fan 11
May be configured to be discharged to the outside. Further, the electronic cooling / heating element 2 has a structure in which the cooling / heating surface is brought into direct contact with the inner surface of the cylinder. However, as shown in FIG. 7, a material having good heat conduction, such as aluminum or copper, is laminated on the inner surface of the cylinder to cool / heat radiation layer. 12 to form the cold heat radiation layer 12
Alternatively, the cooling / heating surface of the electronic cooling / heating element 2 may be closely attached. Thereby, cold heat is efficiently conducted throughout the cold heat radiation layer 12, and the cooling effect on the inner surface of the cylinder is further enhanced. By the way, when the heating cylinder is configured, as shown in FIG.
Change the cooler shown in to a warmer. The air flow shown in FIG. 5 is also reversed.

[0014]

As described above, according to the present invention, since the structure in which the cylinders or rollers of various machines are cooled or heated by the electronic cooling / heating element, the size of the apparatus is reduced and mechanical vibration is generated. Since there is no source, no noise is generated. Also, since the arrangement and number of electronic cooling / heating elements can be selected according to the surface temperature distribution of the cylinder / roller, the surface temperature of the cylinder / roller can be easily controlled, and the current to the cooling / heating element can be controlled to be uniform and appropriate. The surface temperature can be adjusted.

[Brief description of drawings]

FIG. 1 is a structural diagram of a cylinder or a roller that is heated or cooled by using an electronic cooling device according to the Peltier effect of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

4 is a cross-sectional view taken along the line CC of FIG.

FIG. 5 is a development view of a part of a cylinder or a roller for explaining the arrangement structure of the electronic cooling and heating elements.

FIG. 6 is a configuration diagram in which an electronic cooling element is radiated with cold air.

FIG. 7 is a diagram showing another mounting configuration of the electronic cooling element.

FIG. 8 is a diagram illustrating group control of electronic cooling and heating elements.

FIG. 9 is a block diagram of group control of electronic cooling and heating elements.

FIG. 10 is a diagram for explaining cooling of a cylinder or a roller by a conventional water cooling type.

[Explanation of symbols]

 1 Cylinder 2 Electronic Cooling Element 3 Air Supply Fan 4 Exhaust Fan 5 Radiator 6 Heat Insulation Material 12 Cold Heat Radiation Layer

Claims (9)

[Claims] 1. A hollow inner surface is provided with a plurality of electronic cooling elements by the Peltier effect, and the electronic cooling elements are densely arranged corresponding to a site where partial heat generation or cooling occurs to obtain a uniform surface temperature distribution. Cylinder or roller characterized by the above. 2. A hollow inner surface is provided with a plurality of electronic cooling / heating elements by the Peltier effect, the electronic cooling / heating elements are divided into a plurality of groups in the axial direction and / or the circumferential direction, and current control is performed for each group. Characteristic cylinder or roller. 3. A fan for air-cooling or heating an electronic cooling device, a rotor of the fan is attached to a cylinder or a roller, and air is blown by rotation of the cylinder or the roller. Cylinder or roller as described. 4. The cylinder or roller according to claim 1, wherein a cold heat radiation layer is formed on the inner surface, and an electronic cold heat element is closely attached to the cold heat radiation layer. 5. An electronic cooling / heating element based on the Peltier effect, a plurality of which is arranged on the inner surface of the cylinder or the roller, a sensor for detecting the surface temperature of the cylinder or the roller, and means for controlling the current of the electronic cooling / heating element by the sensor output. Cylinder or roller heating / cooling system equipped. 6. A sensor for detecting a surface temperature of a cylinder or a roller corresponding to each group by dividing a plurality of electronic cooling / heating elements arranged on the inner surface of the cylinder or the roller into a plurality of groups.
Heating of a cylinder or roller provided with means for controlling the current of the electronic cooling and heating elements of each group by the output of each sensor
Cooling system. 7. The current control means controls the magnitude and direction of the current supplied to the electronic cooling / heating element, and a cooling heat source or a heating heat source is configured.
Cylinder or roller heating / cooling system described. 8. A means for cooling or warming the electronic cooling / heating element by discharging cooling air or warm air toward the electronic cooling / heating element from the means is provided in the cylinder or roller. The heating / cooling system for a cylinder or roller according to claim 5. 9. The heating / cooling system for a cylinder or roller according to claim 8, wherein the cold air or warm air is normal room air.