JPH06182976A - Roller temperature control device - Google Patents

Abstract

PURPOSE:To obtain the title device capable of heating and cooling a roller by a simple structure and small-sized equipment by sending compressed air into a hot and cold air generating pipe to rotate the same at a high speed and forming hot air and cold air. CONSTITUTION:A hot and cold air generating pipe 7 has such a structure that compressed air is rotated at a high speed within the pipe 7 to simultaneously form hot air and cold air and hot air is sent out of one end of the pipe 7 and cold air is sent out of the other end thereof. The inflow port 22 of the hot and cold air generating pipe 7 is connected to a compressed air source 21 through an air supply pipe 8 and a solenoid valve 9 and a filter regulator 10 are arranged to the air supply pipe 8. One end of hot air supply piping 11 is connected to the hot air blowoff port 27 of the hot and cold air generating pipe 7 and one end of cold air supply piping 12 is connected to a cold air blowoff port 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller temperature adjusting device for controlling the temperature of rollers used in various industrial machines such as an ink roller of a printing machine to an appropriate temperature.

[0002]

2. Description of the Related Art Ink used for printing, for example, has an optimum operating temperature range for obtaining high quality printing. For example, if the temperature of the ink roller rises during operation and the viscosity of the ink falls below a specified value, the color density of the printed matter may change and good printing may not be possible. As a countermeasure, conventionally, cooling water is supplied to the ink roller to cool the roller to prevent the ink temperature from rising. On the contrary, when the temperature of the ink decreases in the cold district and the viscosity of the ink exceeds the specified value, the problem of printing failure similarly occurs. for that reason,
Conventionally, an electrothermal heater is provided in the ink roller, and the ink roller is heated by means such as energizing the heater to keep the temperature of the ink proper.

[0003]

However, in the case of cooling the roller with cooling water, the equipment becomes large, manpower is required for maintenance and inspection such as water leakage, and the cost for maintenance is high. Further, when the roller is heated by the heater, an electric current must be supplied into the rotating roller, which complicates the electric equipment. Further, the system for heating and cooling the roller has a complicated structure. In such a system, there have been problems such as enlargement of equipment, high equipment costs, and maintenance costs. An object of the present invention is to provide a roller temperature adjusting device capable of heating and cooling a roller with a simple structure and small equipment.

[0004]

In order to achieve the above object, the present invention is an apparatus for adjusting the temperature of a roller or the like to an appropriate temperature, in which compressed air is fed into a hot / cold air generating tube to rotate at high speed. And a first pipe for supplying the hot air to the rollers, a second pipe for supplying the cold air to the rollers, and switching between the supply of the hot air or the cold air and the supply of the hot and cold air. A valve and roller temperature detection means for directly or indirectly detecting the temperature of the roller,
And a control means for selectively operating the valve according to the detected roller temperature to control the supply of the hot air or the cold air. Another invention is the above invention,
The roller temperature detecting means is a non-contact type thermometer for the roller whose temperature is adjusted.

Another aspect of the present invention is an apparatus for adjusting the temperature of a roller or the like to an appropriate temperature, wherein hot air and cold air generating means for generating hot air and cold air by sending compressed air into a hot cold air generating tube to rotate at high speed are provided. First piping for supplying hot air to the rollers,
A second pipe for supplying the cool air to the roller, a valve for switching the supply of the hot air or the cold air, and a temperature detecting means for directly or indirectly detecting the temperature of a member having a thermal correlation with the temperature of the roller. And a control means for selectively operating the valve according to the detected temperature and controlling the supply of the hot air or the cold air. Yet another invention is
The temperature detecting means is a thermometer that directly or indirectly measures the temperature of the product produced or processed by the roller.

[0006]

According to the above construction, when the temperature of the roller is within the set value range, the supply of compressed air to the hot / cold air generating pipe is stopped, and the first and second pipes are closed by the valve, Hot or cold air is not sent to the rollers. When the roller temperature exceeds the set value range, high pressure air is sent to the hot / cold air generating means to generate hot air and cold air, and the valve is switched according to the direction of temperature change with respect to the set value to send hot air or cold air to the roller. To heat or cool. That is, when the roller temperature rises above the set value, it is switched to the second pipe and the cool air generated by the hot cold air generating means is sent to the roller to be cooled. On the other hand, when the roller temperature has cooled to below the set value, it is switched to the first pipe and the generated hot air is sent to the roller to warm it. As a result, the roller is kept within a predetermined temperature range.

[0007]

Embodiments of the roller temperature adjusting device of the present invention will be described below. FIG. 1 shows the configuration of an embodiment of the present invention. A support shaft 4 at both ends of a roller 3 is rotatably supported by bearings 2 on frames 1 on both sides of the machine. Heat conducting fins 3 a are provided on the inner surface of the roller 3. A pipe 5 for supplying hot and cold air is inserted through the center of the support shaft 4. A large number of holes 5a are formed on the outer circumference of the pipe 5 inside the roller 3.
Is opened. Further, a non-contact type temperature sensor 6 as a roller temperature detecting means is arranged at a position close to the outer circumference of the roller 3.

On the other hand, the housing 20 mounted on the outside of the frame 1 has a hot / cold air generating tube 7, a solenoid valve 9 and a switching valve 1.
3, 14, etc. are incorporated. Compressed air supplied from the compressed air source 21 passes through the solenoid valve 9 and the hot / cold air generating tube 7
Is sent inside. The hot / cold air generation tube 7 rotates compressed air at high speed in the tube to generate hot air and cold air at the same time, sends hot air from one end side of the hot / cold air generation tube, and sends cold air from the other end side of the hot / cold air generation tube. It is structured to

The inflow port 22 of the hot / cold air generating pipe 7 is connected to the compressed air source 21 via the air supply pipe 8, and the air supply pipe 8 is provided with a solenoid valve 9 and a filter regulator 10. One end of the hot air supply pipe 11 is connected to the hot air outlet 27 of the hot and cold air generating pipe 7, and one end of the cold air supply pipe 12 is connected to the cold air outlet 28. Both pipes 11 and 12 are communicated with the pipe 5, and three-way solenoid valves 13 and 14 are provided respectively.
Further, the three-way solenoid valves 13 and 14 are provided with exhaust pipes 15 and 16 which communicate with the outside, respectively. This exhaust pipe 15,
Silencers 17 and 18 are attached to 16 respectively.

The control unit 19 controls the solenoid valves 9, 13 and 14 based on the roller temperature detected by the temperature sensor 6. That is, when the temperature of the roller exceeds the preset temperature range, the solenoid valves 13 and 14 are operated to open and close the pipeline, and the solenoid valve 9 is operated to operate the compressed air source 21.
The compressed air is supplied to the hot / cold air generating tube 7 from the above, and the generated hot air or cold air is sent into the roller 3 to perform heating or cooling according to the roller temperature.

The structure of the hot and cold air generating tube 7 which is generally commercially available will be described in detail with reference to FIGS. The hot / cold air generating tube 7 is provided with a vortex flow generating section 23 for generating a vortex fluid that flows compressed air flowing in from an inflow port 22 connected to a compressed air source 21 at high speed to flow in the axial direction of the tube. A conduit 25 is provided at the outlet 24 of the vortex flow generating unit 23 to flow the generated vortex fluid while rotating at high speed in the axial direction of the pipe and along the inner wall of the pipe. The inflow port 22 is arranged at right angles to the tube axis of the conduit 25.

A vortex fluid reversal member 26 is provided near the tip of the conduit 25. The reversing member 26 is provided with a plurality of holes 26a on the tube wall side. A hot air outlet 27 is provided outside the reversing member 26. Also conduit 2
A cap 32 provided with a cold air outlet 28 for sending cold air is fitted in the vortex flow generating portion 23 on the opposite side to 5. In the vortex flow generation unit 23, a vortex flow generation element 31 is provided inside a main body 30 in which a conduit 25 is integrally molded.
At the open end of the main body 30, a cap 32 having a cool air outlet 28 is fitted.

The vortex generating element 31 is provided with an element body 34 that forms an annular passage 33 between itself and the inner surface of the body, and a flange portion 35 that fits into the inner diameter of the body 30 of the vortex generating tube is provided at one end of the element body. Has been formed. Further, the element body 34 is formed with a tapered hole 36 having a center coinciding with the tube axis. The opening of the tapered hole 36 located on the conduit side serves as the cold air inlet 37, and the inner diameter thereof is formed smaller than the inner diameter of the conduit. On the end face of the element body 34 located on the conduit side,
As shown in FIG. 3, six guide blades 38 are formed.

The inlet of the narrow gap 38a of the guide blade 38 communicates with the annular passage 33, and the outlet of the guide blade 38 communicates with the gap 39 formed between the end face of the element body 34. The vortex fluid generated by the guide blade 38 is pumped by the gap 39 along the pipe axial direction of the conduit 25 and along the pipe inner wall. A cold air outlet 40 communicating with the tapered hole 36 is formed on the end portion 35 side of the element body, and the cold air outlet 40 is inserted into the cold air outlet 28 provided in the cap 32.
In addition, 41 is an O-ring.

When compressed air is supplied from the inflow port 22, it flows at a high speed from the inlet of the guide blade 38 toward the center of the pipe through the annular passage 33. At this time, the guide blade rotates at a high speed to form a vortex. This vortex fluid a is the conduit 2
While being swirled along the inner wall of No. 5, it is pumped and collides with the reversing member 26 at the tip. Then, a part of it passes through the hole 26a and is discharged from the hot air outlet 27, but the remaining part is reversed and becomes the return fluid b, which forms the vortex flow generating portion 2 along the pipe center line.
Reflux to 3. That is, the vortex fluid a and the reversal fluid b in the forward direction flow at high speed in the directions of the outlets 27 and 28 while passing each other inside the conduit 25. In this case, the flow velocity of the reverse flow b is decelerated at the time of collision. According to the well-known principle that heat transfer between the fluids flowing in opposite directions passes from the slower speed to the faster speed fluid, the vortex fluid a reverses the fluid b while passing through the conduit. Heat is taken from the air and is discharged as hot air from the outlet 27. Conversely, the reversal fluid b is deprived of heat and is discharged as cold air from the outlet 28.

Next, the operation of this embodiment will be described. FIG. 5 shows an operation sequence of the roller temperature adjusting device. Control unit 1
9 is a temperature in a predetermined range, for example, a lower limit temperature of 28 ° C.,
The upper limit temperature of 32 ° C is set. In the hot / cold air generating pipe 7, the compressed air source 21 is connected to the filter regulator 1
High-pressure air is fed through the solenoid valve 0 and the solenoid valve 9. When the temperature of the roller 3 is within the predetermined range, the three-way solenoid valves 13 and 14 are in the neutral position and the pipes 11 and 12 are closed, as shown in FIG. Further, since the solenoid valve 9 is closed and compressed air is not supplied, the hot / cold air generation pipe 7
Is inactive.

The temperature of the roller 3 is within a predetermined range, for example 28 ° C.
If it is lower, the signal from the control unit 19 causes the signal shown in FIG.
As shown in (b), the three-way solenoid valve 13 operates in a direction to connect the conduit of the hot air supply pipe 11, and the three-way solenoid valve 14 connects the inlet side of the cold air supply pipe 12 and the exhaust pipe 16. Work in the direction. As a result, the hot air generated in the hot / cold air generating pipe 7 is supplied into the roller 3 via the pipes 11 and 5,
The roller 3 is heated. The cold air generated in the hot / cold air generation pipe 7 is exhausted to the outside via the exhaust pipe 16. When the temperature of the roller 3 is higher than a predetermined range, for example, 32 ° C.,
As shown in FIG. 5C by the signal from the control unit 19,
The three-way solenoid valve 14 operates in a direction in which the pipe of the cold air supply pipe 12 communicates with the three-way solenoid valve 13, and the three-way solenoid valve 13 operates the hot air supply pipe 11
Operates in a direction in which the inlet side of the exhaust pipe 17 and the exhaust pipe 17 communicate with each other. As a result, the cold air generated in the hot / cold air generation pipe 7 is
It is supplied into the roller 3 via 2 and 5, and the roller 3 is cooled. The hot air generated in the hot / cold air generation pipe 7 is exhausted to the outside via the exhaust pipe 15.

According to this embodiment, since the roller 3 is heated or cooled by the hot air or the cold air generated by the hot / cold air generating tube 7, the temperature of the roller 3 can be controlled with a simple structure, and the cooling water or It is possible to solve the problem that occurs when using the electric heater. In this embodiment, the temperature of the roller to be cooled / heated is detected and controlled. However, the temperature of the member or product correlated with the roller in terms of temperature (thermally) is detected and controlled. Of course, you can do that.

Next, the adjustment of the roller temperature based on the temperature of the member having a temperature correlation with the roller will be described. FIG. 6 shows an apparatus configuration when the present invention is applied to temperature control of ink on a printing machine. The ink 51 stored in the ink fountain 50 moves to the fountain roller 53, the calling roller 54, and the kneading roller 55 as the rollers rotate, and further to the kneading roller 56, the kneading roller 55, ... Then, in the meantime, they are mixed in the contact portion between the rollers to form a uniform thin film in order. Then, the ink film passes from the final stage kneading roller 55 to the forming roller 57 and then to the plate cylinder 5.
It is applied to the plate surface 59 set to 8.

The pot roller 53 and the kneading roller 55 are provided with the hot and cold air generating means shown in FIG. 1, and each hot and cold air generating means 60 is controlled based on the temperature detection signal of the plate 59 from the temperature sensor 101. It is controlled by a command from the unit 100. Since the ink film is an extremely thin film of about several microns, the temperature of the plate surface 59 and the temperature of the ink film may be considered to be equal. Therefore, the control unit 10
0 is configured to control each hot / cold air generating means 60 according to the temperature of the printing plate.

That is, the control unit 100 has a printing plate 59 in advance.
The hot and cold air supply control for each hot and cold air generating means 60 is programmed in accordance with the temperature of the plate, and the hot and cold air to each roller is based on the temperature of the plate 59 detected by the temperature sensor 101, that is, the ink temperature. Control the supply and adjust the ink temperature on the plate to the specified value. According to this embodiment, by adjusting the temperature of the plurality of gold rollers 55 based on the temperature of the plate surface, the ink temperature on the plate surface can be maintained at the specified value, and good printing can be guaranteed.

[0022]

As described above, according to the present invention,
Since the temperature of the roller is adjusted using the hot air or the cold air generated by the hot / cold air generation tube, the roller temperature can be easily adjusted within the predetermined temperature range with a simple structure, which improves product quality. Can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic view showing a configuration of an embodiment of a roller temperature adjusting device of the present invention.

FIG. 2 is a cross-sectional view of a hot / cold air generation tube.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a side view taken along the line BB of FIG.

FIG. 5 is a diagram showing an operation sequence for explaining the operation of the embodiment.

FIG. 6 is a schematic diagram of a device configuration when applied to temperature control of ink on a printing machine.

[Explanation of symbols]

1 frame, 3 rollers, 5,11,12 piping, 6
Temperature sensor, 7 hot and cold air generating tube, 13, 14 three-way solenoid valve, 19 control section, 50 ink fountain, 53 fountain roller, 54 calling roller, 55 kneading roller, 56
Kneading roller, 57 wearing roller, 58 plate cylinder, 59
Plate, 60 hot and cold air generating means, 100 control section, 101
Temperature sensor

Claims (4)

[Claims] 1. A device for adjusting a roller or the like to an appropriate temperature, wherein compressed air is fed into a hot / cold air generating tube to rotate at high speed,
Hot-cold air generating means for generating hot air and cold air, a first pipe for supplying the hot air to the rollers, a second pipe for supplying the cold air to the rollers, a valve for switching the supply of the hot air or the cold air, A roller temperature detecting means for directly or indirectly detecting the temperature of the roller, and a control means for selectively operating the valve according to the detected roller temperature to control the supply of the hot air or the cold air are provided. A roller temperature adjusting device characterized in that 2. The roller temperature adjusting device according to claim 1, wherein the roller temperature detecting means is a non-contact thermometer for the roller whose temperature is adjusted. 3. A device for adjusting a roller or the like to a proper temperature, wherein compressed air is sent into a hot / cold air generating tube to rotate at high speed,
Hot-cold air generating means for generating hot air and cold air, a first pipe for supplying the hot air to the rollers, a second pipe for supplying the cold air to the rollers, a valve for switching the supply of the hot air or the cold air, Temperature detection means for directly or indirectly detecting the temperature of a member having a thermal correlation with the temperature of the roller, and selectively operating the valve according to the detected temperature to control the supply of the hot or cold air. And a control means for controlling the temperature of the roller. 4. The roller temperature adjusting device according to claim 3, wherein the temperature detecting means is a thermometer that directly or indirectly measures the temperature of the product produced or processed by the roller.