CN202016252U - Cooling roll device of printing machine - Google Patents

Abstract

The utility model discloses a cooling roller device for a printing machine, which comprises a cooling roller (1) provided with a water chamber, a water inlet pipe (2) and a water outlet pipe (3) communicating with the water chamber (1.1) of the cooling roller (1) described cooling roller (1) is rotatably installed on the frame of printing press, it also comprises the frequency conversion motor (4) that its control unit is electrically connected with the controller of main frame, the rotation of described frequency conversion motor (4) The shaft and one end of the cooling roller (1) are driven by a transmission device. The cooling roller of the cooling roller device of the printing machine can rotate without being driven by the material film.

Description

Printing machine chill roll unit

technical field

The utility model relates to a cooling roller device of a printing machine.

Background technique

The cooling roller device of the printing press in the prior art includes a cooling roller, a water inlet pipe and a water return tank, and the cooling roller is rotatably mounted on the frame of the printing press through a bearing and a bearing seat. The cooling roller is provided with a water chamber extending axially along the cooling roller, and one end of the water chamber communicates with the outside world, and the water inlet pipe leads into the water chamber of the cooling roller and communicates with the water chamber. The water return tank is fixed at the end of the cooling roller provided with the mouth of the water chamber, and the end of the cooling roller passes into the water return tank cavity, the water chamber of the cooling roller communicates with the water return tank cavity, and the return water tank The bottom is provided with an outlet pipe communicating with the cavity of the return tank. When in use, the material film is covered on the cooling roller, and the friction formed under the action of the printing tension of the material film will drive the cooling roller to rotate, and the cooling water flowing in the cooling roller will take away the heat on the material film to cool the material film. role. The cooling roll device of this prior art printing machine has the following defects: since the cooling roll device of the prior art drives the cooling roll to run through the friction force generated between the material film and the surface of the cooling roll, this friction force cannot ensure that the cooling roll The line speed of the cooling roller is consistent with the line speed output by the host, that is, it cannot be guaranteed that the line speed of the cooling roller is consistent with the moving speed of the material film, but if the two speeds are inconsistent, the surface of the material film will be scratched, thereby affecting the quality of the printed product At the same time, the friction between the material film and the cooling roller surface will inevitably affect the fluctuation of printing tension between the color groups, and the fluctuation of tension will inevitably lead to the increase of overprint error, thus affecting the quality of printed products.

Utility model content

The technical problem to be solved by the utility model is to provide a printing machine cooling roller device which can rotate without being driven by the material film.

The technical solution of the utility model is to provide a cooling roller device for a printing machine with the following structure, which includes a cooling roller provided with a water chamber, a water inlet pipe and an outlet pipe connected with the water chamber of the cooling roller; the cooling roller It is rotatably installed on the frame of the printing press, and it also includes a variable frequency motor whose control unit is electrically connected to the controller of the main engine. The rotating shaft of the variable frequency motor and one end of the cooling roller are driven by a transmission device.

After adopting the above structure, compared with the prior art, the cooling roller device of the printing machine of the utility model has the following advantages:

Since the cooling roller device of the printing press of the present invention also includes a variable frequency motor whose control unit is electrically connected to the controller of the main engine, the rotating shaft of the variable frequency motor and one end of the cooling roller are driven by a transmission device. During operation, the controller of the main engine After the signal is processed according to the speed of the main engine, the output frequency is transmitted to the controller of the variable frequency motor, and the controller of the variable frequency motor sends instructions to the motor to rotate, so that the linear speed output by the variable frequency motor is consistent with the linear speed output by the main engine , and under the action of the transmission device, the linear velocity of the cooling roller will be consistent with the output linear velocity of the host, so that the cooling roller can rotate without being driven by the material film, and the material film is only attached to the outer surface of the cooling roller The top moves synchronously with the cooling roller, so it will not scratch the surface of the material film, and will not affect the printing tension between the color groups, so that the quality of the printed product can be guaranteed.

As an improvement of the utility model, the transmission device includes a first pulley fixed on the rotating shaft of the variable frequency motor, a second pulley fixed on one end of the cooling roller and a synchronous belt, and the synchronous belt is installed on on the first and second pulleys. The transmission device of this structure has low noise and requires no maintenance.

As another improvement of the present utility model, it also includes a water return tank, and the said water chamber communicates with the water outlet pipe means that the said water return tank communicates with the water chamber, and the said water outlet pipe communicates with the water return tank. A transparent pipe is provided between the water return tank and the water outlet pipe; the upper end of the transparent pipe penetrates the side wall of the water return tank and communicates with the cavity of the water return tank, and the lower end of the transparent pipe penetrates the side wall of the water outlet pipe and communicates with the water outlet pipe. The horizontal line at which the lowest point of the transparent tube is lower than the horizontal line at which the lowest point of the outer wall of the end of the cooling roll provided with the water cavity mouth is 10-15 mm. In this way, when the return water is not smooth, the cooling water in the return water tank will be stagnated. If there is water flowing through the transparent tube, the amount of water intake must be controlled to prevent cooling water from flowing into the gap between the end of the cooling roller and the return water tank. Into the bearing seat fixed on the frame or the wire slot on the frame, causing the bearing to rust or the electric wire to leak.

As another improvement of the present utility model, the transmission device is provided with a cover outside. Because the cover is arranged outside the transmission device, it can prevent the transmission device from contacting with people and causing injury to people.

Description of drawings

Fig. 1 is a schematic structural view of the cooling roller device of the printing machine of the present invention.

FIG. 2 is an enlarged structural schematic diagram of the part circled in FIG. 1 .

As shown in the figure: 1. Cooling roller, 1.1. Water chamber, 2. Water inlet pipe, 3. Water outlet pipe, 4. Frequency conversion motor, 5. Bearing, 6. Bearing seat, 7. The first pulley, 8. The second Pulley, 9, synchronous belt, 10, the first flat key, 11, the second flat key, 12, cover body, 13, return tank, 14, transparent tube.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

Please refer to Fig. 1 and shown in Fig. 2, the cooling roller device of the printing machine of the present invention includes a cooling roller 1, a water inlet pipe 2, a water outlet pipe 3 and a variable frequency motor 4 whose control unit is electrically connected with the controller of the main engine. The cooling roller 1 is rotatably mounted on the frame of the printing press through the bearing 5 and the bearing housing 6, that is, the cooling roller 1 is equipped with a bearing housing 6 near the two ends, and each bearing housing 6 is fixed on the On the frame, bearings 5 are installed in each bearing block 6, and each bearing 5 is fitted on the outer wall 1 of the cooling roll 1 and clamped with the cooling roll 1 outer surface. The cooling roller 1 is provided with a water chamber 1.1 extending axially along the cooling roller 1, and one end of the water chamber 1.1 communicates with the outside. The frequency conversion motor 4 is fixedly mounted on the bearing housing 6 far away from the mouth of the water chamber 1.1 of the cooling roller 1, and the rotating shaft of the frequency conversion motor 4 and the end of the cooling roller 1 away from the mouth of the water chamber 1.1 are driven by a transmission device. The transmission device includes a first pulley 7 fixed on the rotating shaft of the variable frequency motor 4, a second pulley 8 and a synchronous belt 9 fixed on the end of the cooling roller 1 away from the mouth of the water chamber 1.1. A belt 9 is mounted on the first pulley 7 and the second pulley 8 . The first flat key 10 is provided between the rotating shaft of the frequency conversion motor 4 and the first pulley 7, and the second pulley 8 is provided between the end of the cooling roller 1 away from the mouth of the water chamber 1.1 and the second pulley 8. Flat key 11. The transmission device is provided with a cover body 12 outside.

The cooling roller device of the printing press of the utility model also includes a water return tank 13, and the water return tank 13 is a closed cylinder, and the cooling roller 1 is provided with a water cavity 1. One end of the mouth of the cavity passes through the side wall of the water return tank 13. Into the cavity of the water return tank 13, so that the water return tank 13 communicates with the water chamber 1.1 of the cooling roller 1. The outlet pipe 3 is arranged at the bottom of the return tank 13 and communicates with the cavity of the return tank 13 . A transparent pipe 14 is provided between the water return tank 13 and the water outlet pipe 3; the upper end of the transparent pipe 14 runs through the side wall of the water return tank 13 and communicates with the cavity of the water return tank 13, and the lower end of the transparent pipe 14 runs through the side wall of the water outlet pipe 3 and The water outlet pipe 3 is connected to each other, and the horizontal line of the lowest point of the transparent pipe 14 is 10-15mm lower than the lowest point of the outer wall of the end of the cooling roller 1 provided with the water chamber 1.1.

When running, the programmable controller of the main engine processes the signal according to the speed of the main engine, and then transmits the output frequency to the controller of the variable frequency motor (that is, the frequency converter of the variable frequency motor), and the controller of the motor sends instructions to the motor to make it rotate. To ensure that the line speed of the main machine is consistent with the line speed of the frequency conversion motor, the rotation shaft of the motor will be driven to the cooling roller to rotate through the transmission device, so as to ensure that the cooling roll is actively rotating and the line speed of the cooling roll is consistent with the line speed of the main machine.

Claims (5)

1. printing machine cooling roll device, it comprises the chill roll (1) that is provided with water cavity, the water inlet pipe (2) that is communicated with chill roll (1) water cavity (1.1) and outlet pipe (3); Described chill roll (1) is rotatable to be installed on the frame of printing machine, it is characterized in that: it also comprises the variable-frequency motor (4) that its control module is electrically connected with the controller of main frame, and the turning cylinder of described variable-frequency motor (4) and chill roll (1) one end are by the transmission device transmission.

2. printing machine cooling roll device according to claim 1, it is characterized in that: described transmission device comprises that first belt wheel (7) that is fixed on variable-frequency motor (4) turning cylinder, second belt wheel (8) that is fixed on chill roll (1) one end reach band (9) synchronously, and described synchronous band (9) is installed on first belt wheel (7) and second belt wheel (8).

3. printing machine cooling roll device according to claim 1 and 2, it is characterized in that: it also comprises return flume (13), described water cavity (1.1) is communicated with outlet pipe (3) and is meant that described return flume (13) is communicated with water cavity (1.1), and described outlet pipe (3) is communicated with return flume (13).

4. printing machine cooling roll device according to claim 3 is characterized in that: be provided with transparent pipe (14) between described return flume (13) and the outlet pipe (3); Described transparent pipe (14) upper end connects return flume (13) sidewall and is communicated with return flume (13) cavity, transparent pipe (14) lower end connects outlet pipe (3) sidewall and is communicated with outlet pipe (3) pipeline, and the horizontal line at the minimum point place of described transparent pipe (14) pipeline is lower than the horizontal line 10～15mm at minimum point place of outer wall that chill roll (1) is provided with the end of water cavity (1.1) accent.

5. printing machine cooling roll device according to claim 4 is characterized in that: described transmission device is provided with cover body (12) outward.

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