JPH0664347B2 - Photosensitive lithographic printing plate dryer - Google Patents

Description

The present invention relates to a photosensitive lithographic printing plate (PS plate) drying device,
It is a drying device particularly suitable for a gum solution coating machine.

[Conventional technology]

Conventionally, devices such as an automatic developing machine for a photosensitive lithographic printing plate and a gum solution coating machine handle the photosensitive material to be handled horizontally,
The problem is that the installation space becomes large, and efforts have been made to save space. In these devices,
Attempts have been made to minimize the installation space. For example, in a drying device used in a gum solution coating machine for a photosensitive lithographic printing plate, the circulating air suction port was arranged on the bottom plate of the drying box.

This will be described in detail with reference to the drawings. FIG. 2 is a diagram showing an example of a drying device of a conventional PS plate gum solution coating machine, (a) is a front view thereof, and (b) is a BB sectional view of (a). Second
In the figure, the PS plate 10 coated with the gum solution that passes through the center of the drying box 1 enters the drying box 1 through the entrance partition plate 5 and is a flower roller.
It is sandwiched between 12 and transported in the dry box 1 by point contact. During this time, drying is performed by the drying air (temperature of 60 to 80 ° C.) blown from the slit air outlets 9a and 9b of the duct 9, and finally the finishing is finished by the Molton roller 11 and the drying is performed from the outlet partition plate 4 of the drying chamber 1. The process is completed with the PS version discharged.

At this time, in order to circulate and use the dry air, the dry air used for drying the PS plate 10 is sucked from the air outlet 13 provided in the bottom plate 2 of the drying box 1 as the circulating air by the blower 7. Then, after heating through the heater 8, it is blown to the surface of the PS plate 10 from the upper slit outlet 9a and the lower slit outlet 9b through the duct 9 penetrating one side plate 3a of the drying box 1 to perform drying.

The hot air is sprayed from the upper and lower slit air outlets 9a, 9b onto the PS plate 10 to perform the function of drying, and then a fresh air that partially enters the drying box 1 and the air outlet 13 provided on the bottom plate 2 Is sucked into the blower 7 and reused.

[Problems to be solved by the invention]

However, in the conventional drying apparatus, when the PS plate 10 enters the drying box 1 and begins to dry, the drying air blown out from the lower slit outlet 9b serves to dry the gum solution on the PS plate 10. Immediately, the blower 7 is sucked into the blower 7 through the blower port 13 provided in the bottom plate 2 of the drying box 1 and circulated for use. On the other hand, the hot air blown from the upper slit blower outlet 9a serves to dry the gum solution of the PS plate 10. Immediately after it was finished, it could not be sucked into the suction port 13 and flowed laterally along the upper surface of the PS plate 10, and the collected hot air was collected.
It had to be sucked into the suction port 13 through a narrow space between the end of the PS plate 10 and the side plates 3a and 3b of the drying box 1. as a result,
The hot air blown out from the upper slit outlet 9a was flowing out of the drying box 1 from the inlet partition plate 5 or the outlet partition plate 4 of the drying box 1 having a rather small flow resistance. When such a state occurs, in order to compensate for the suction amount of the blower 7, a state in which the air outside the drying box 1 flows into the lower side of the PS plate, contrary to the upper side. as a result,
Non-uniform drying due to different drying speeds on the upper and lower surfaces of the PS plate 10 and further reduction in thermal efficiency of the drying air due to more fresh air. Therefore, the temperature of the room in which the drying device is installed rises, which is not preferable.
When a large amount of gum solution is applied on the PS plate and the gum solution flows into the drying box 1, the suction port provided on the bottom plate 2 of the drying box 1
There was also an accident in which the motor of the blower 7 was seized due to overload as it entered the blower 7 through 13 and dried and solidified.

The present invention solves the above-mentioned drawbacks, uniformly dry both the front and back surfaces of the PS plate 10, minimizes the outflow of hot air to the outside of the drying box, and does not deteriorate the environment of the room in which the drying device is installed, and simultaneously dry It is to provide a PS plate drying apparatus that is highly efficient and thermo-economically advantageous.

[Means and Actions for Solving Problems]

The present invention is a drying device for drying a photosensitive lithographic printing plate, which is provided in a direction intersecting with the transport direction of the photosensitive lithographic printing plate transported in a drying box and directed to both side surfaces of the photosensitive lithographic printing plate. And a drying air blowing duct having a continuous slit outlet in substantially the entire width direction of the photosensitive lithographic printing plate for blowing out a drying air, and a drying opening along at least one side of a conveying path of the photosensitive lithographic printing plate. A drying device for a photosensitive lithographic printing plate, comprising: a circulating air suction port for wind; and a drying air blowing unit that heats the drying air sucked from the circulating air suction port and sends it to the drying air blowing duct. Is.

〔Example〕

An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a front view of a PS plate drying apparatus according to an embodiment of the present invention, and FIG. 1B is a sectional view taken along line AA of FIG.

The air sent from the dry air blowing means equipped with the air blower 7 is adjusted in temperature by the heater 8 and becomes hot air of 60 to 80 ° C. which is dried by the duct 9 The upper and lower slits which are continuous in substantially the entire width direction of the PS plate Guided to the outlets 9a, 9b. The method of suspending the duct 9 on the drying box 1 is performed by fitting the ends 9c and 9d of the duct 9 into the holes provided in the side plates 3a and 3b. The side plate 3b (the side plate on the dry air outlet side) has many suction ports 13
Is provided, whereby the intake of the dry circulating air is performed.

As shown in FIG. 3, the duct 9 has a substantially pentagonal tubular shape, and one ridgeline of the duct 9 is open to open the slit outlet.
9a and 9b are formed. Dry air introduced from one end 9c of the duct 9 is blown from the slit outlet 9a (9b) to both sides of the PS plate 10 to dry the gum solution.

By using this dryer, upper and lower slit outlets
The dry air from 9a and 9b was equally sucked and circulated through the suction port 13 provided in the side plate 3b, and the front and back surfaces of the PS plate 10 were uniformly dried.

〔The invention's effect〕

By providing the air intake port for circulating air of the present invention along at least one side of the transport path of the PS plate, the front and back surfaces of the PS plate are uniformly dried, and the outflow of hot air to the outside of the drying box is minimized. Therefore, the working conditions of the room where the drying device is installed are improved, and the thermal efficiency of the drying air is increased, contributing to the reduction of heating cost. Further, the gum solution flowed into the drying box and solidified, so that there was no accident such as the conventional motor burnout. Moreover, despite the practice of the present invention, the gum solution coating machine could be installed without significantly increasing the external dimensions.

[Brief description of drawings]

FIG. 1 is a front view of a drying device of a gum solution coating machine for a photosensitive lithographic printing plate which is an embodiment of the present invention, (b) is a sectional view taken along line AA of (a), and FIG. Is a front view of an example of a drying device of a conventional gum solution coating machine for a photosensitive lithographic printing plate,
(B) is a BB sectional view of (a). FIG. 3 is a perspective view of a duct used in the drying device of the present invention. 1 ... Drying box, 2 ... Bottom plate, 3a, 3b ... Side plate, 4 ... Outlet partition plate, 5 ... Inlet partition plate, 6 ... Coating section, 7 ... Blower, 8 ... Heater, 9 ... … Duct, 9a, 9b …… Slit outlet, 10 …… PS plate, 11 …… Morton roller, 12 …… Flower roller, 13 …… Suction port, 14 …… Suction duct.

Claims (1)

[Claims] 1. A drying device for drying a photosensitive lithographic printing plate, which is provided in a direction intersecting with a conveying direction of the photosensitive lithographic printing plate conveyed in a drying box, and both side surfaces of the photosensitive lithographic printing plate. A dry air blowing duct having a continuous slit outlet in substantially the entire width direction of the photosensitive lithographic printing plate for blowing a dry air toward the opening, and an opening along at least one side of a conveying path of the photosensitive lithographic printing plate For a photosensitive lithographic printing plate, comprising: a circulating air suction port for drying air, and a drying air blowing means for heating the drying air sucked from the circulating air suction port and sending it to the drying air blowing duct. Drying device.