JP3126989U - Water development type photosensitive resin plate making equipment - Google Patents

Abstract

In a water-developable photosensitive resin plate making apparatus, scum in a washing tank 1 can be sequentially removed during washing-out processing, and it is easy to prevent deterioration of a developing state due to adhesion of scum. And a washing tank 1 having a double structure of an outer tank 4 that receives the developer overflowed from the inner tank 3, and the developer discharged from the outer tank 4 of the washing tank 1 is filtered through the filtration tank 2. Then, a water developing type photosensitive resin plate making apparatus provided with a reflux pump 12 for washing out the filtered developer and refluxing it to the inner tank 3 of the tank 1 is obtained.
[Selection] Figure 1

Description

  The present invention relates to a water-developable photosensitive resin plate making apparatus that uses a plate material made of a water-developable photosensitive resin that easily generates scum during development.

  Plate making such as a flexographic plate and a relief plate using a water-developable photosensitive resin is performed by washing and developing a plate surface of a water-developable photosensitive resin plate material that has undergone an imaging process. In this plate making, the photosensitive resin composition washed off during development and dispersed in an aqueous developer is aggregated and precipitated as a hydrophilic gel substance (scum). In particular, for a plate material coated with a black layer that is imaged by laser, a black scum in which a part of the washed-out black layer is mixed is generated. If the scum adheres to the plate surface being washed out, it may cause the development state to deteriorate.

  Conventionally, as a water-developable photosensitive resin plate making apparatus, a storage tank is connected to the bottom of a washing tank for performing development processing, and after a predetermined number of washing processes are completed in the washing tank, the developer in the washing tank is removed. All of the developer discharged to the storage tank is filtered back to the storage tank through a sealed filter unit with a circulating pump equipped with a crushing blade, and the filtered developer is filtered. There is known one that is supplied to a washing tank again with a supply pump so that it can be used (see Patent Document 1).

JP 2000-221893 A

  The conventional water-developable photosensitive resin plate making apparatus removes the scum in the used developer so that it can be used again when replacing the developer in the wash-out tank. It is not removed sequentially during processing. For this reason, there is a problem that the developing state is liable to deteriorate due to adhesion of the scum, such as when the replacement timing of the developer is wrong or when the scum is generated more than expected. In addition, for filtration, a circulation pump equipped with a blade for crushing, a hermetic filter unit, and the like must be prepared.

  The present invention has been made in view of the above-described conventional problems. In the water developing type photosensitive resin plate making apparatus, the scum in the washing tank can be sequentially removed during the washing process, and the development state due to the adhesion of the scum is determined. The first object is to make it easy to prevent deterioration. Moreover, this invention makes it the 2nd objective to reduce the cost of an apparatus.

For the above purpose, the present invention
A washing tank having a double structure of an inner tank equipped with a washing device and an outer tank that receives the developer overflowed from the inner tank;
A filtration tank for receiving and filtering the developer discharged from the outer tank of the washing tank;
A water-developable photosensitive resin plate making apparatus is provided, comprising a reflux pump for washing out the developer filtered in the filtration tank and returning it to the inner tank of the tank.

Further, according to the present invention, the filtration tank includes a water permeable plate that divides the inside up and down, and a sheet-like filter that covers the water permeable plate, and receives the developer discharged from the outer tank of the washing tank in the upper part of the filter. The developer that has passed through the filter and the water permeable plate and dropped to the bottom can be supplied from the bottom to the reflux pump.
A liquid level sensor is provided at the bottom of the filtration tank to stop the reflux pump when the liquid level falls below a predetermined position.
The upper part of the filtration tank is open,
Is included as a preferred embodiment thereof.

  In the water developing type photosensitive resin plate making apparatus according to the present invention, the developer in the inner tank in which the development process is performed overflows from the inner tank and flows out to the outer tank. For this reason, the scum floating on the developer in the inner tank can be efficiently taken out to the outer tank. Since the developer flowing out to the outer tank is filtered through the filtration tank and then returned to the inner tank, the scum can be continuously removed while keeping the amount of the developer in the inner tank almost constant. This makes it easy to prevent deterioration of the plate quality due to scum.

  If the developer that has flowed into the outer tank is sent onto a sheet-like filter placed on a water-permeable plate that divides the inside of the filter tank up and down, it will be filtered during permeation and fall due to its own weight. The hermetic filter unit is unnecessary, and the cost can be reduced.

  Hereinafter, an example of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic view showing an example of a water-developable photosensitive resin plate making apparatus according to the present invention, in which 1 is a washing tank and 2 is a filtration tank. Moreover, the arrow in a figure shows the flow direction of a developing solution.

  The washing tank 1 has a double structure of an inner tank 3 and an outer tank 4.

  In the inner tub 3, there is provided a washing-out device 7 for washing the plate surface of the set plate material 5 with a brush 6 in a developing solution and washing it. The washing-out device 7 may be a vertical type that carries out washing with the plate material 5 upright, a horizontal type that carries out washing with the plate material 5 laid down, or a device that carries out washing of a plurality of plate materials 5 at the same time. Good.

  The outer tub 4 accommodates the inner tub 3 and can receive a developing solution overflowing from the inner tub 3. A discharge pipe 9 having a valve 8 interposed is connected to the bottom of the outer tub 4.

  The inside of the filtration tank 2 is partitioned up and down by a water permeable plate 10. The water permeable plate 10 is composed of, for example, a punching board or a net, and a sheet-like filter 11 is covered on the water permeable plate 10.

  A suction side of the reflux pump 12 is connected to the bottom of the filtration tank 2, and a reflux pipe 13 extending to the inner tank 3 of the washing tank 1 is connected to the pressure-feeding side of the reflux pump 12. In other words, the developer collected at the bottom of the filtration tank 2 can be returned to the inner tank 3 by the operation of the reflux pump 12.

  A liquid level sensor 14 is provided in the vicinity of the bottom of the filtration tank 2, and the reflux pump 12 is stopped when the liquid level of the developer accumulated at the bottom of the filtration tank 2 falls below a predetermined position. I can prevent idling.

  In this water-developing photosensitive resin plate making apparatus, the plate material 5 is usually set in the washing-out device 6, the developing solution is filled in the inner tank 2 of the washing-out tank 1, and the circulating developing solution is provided at the bottom of the filtration tank 2. The developing process is performed in a state in which the amount of the developer is stored (a state in which the developer surface is in a position where the level of the developer exceeds the position of the liquid level sensor 14).

  Although the circulation of the developer by the circulation pump 12 may be performed from the beginning, it is generally sufficient to start from the time when scum starts to be generated by a certain amount of washing work. The developer can be circulated by opening the valve 8 and operating the circulation pump 12.

  When the circulation pump 12 is operated, the developer in the filtration tank 2 is supplied to the inner tank 3 via the reflux pipe 13, and the developer in the inner tank 3 is transferred from the upper edge of the inner tank 3 to the outer tank 4. Overflow. At this time, the scum floating on the developer in the inner tank 3 rides on the flow of the overflowing developer and flows out to the outer tank 4 and passes through the discharge pipe 9 on the filter 11 above the filter tank 2. Sent out.

  The developer sent out together with the scum on the filter 11 temporarily stays on the filter 11, but passes through the filter 11 and the water permeable plate 10 by its own weight and falls to the lower part of the filtration tank 2. At this time, the scum remains on the filter 11 and is removed from the developing solution falling to the lower part of the filtration tank 2.

  When the upper part of the filter tank 13 is opened, the scum remaining on the filter 11 can be easily removed, and the clogged state of the filter 11 can be easily checked. In addition, the filter 11 is in a sheet form and only needs to be covered so as to cover the upper surface of the water permeable plate 10, and replacement work is easy.

  The developer that has been filtered by the filter 11 and dropped to the lower part of the filtration tank 2 is sent again to the inner tank 3 by the reflux pump 12 and is subjected to the same processing after being subjected to development processing. . Further, when the amount of the developer stored in the lower portion of the filtration tank 2 is reduced due to, for example, clogging of the filter 11 and is caught by the liquid level sensor 14, the operation of the reflux pump 12 is stopped. Become.

  Note that, for example, some components of the black layer may precipitate at the bottom of the inner tub 3, but a drain plug is provided at the bottom of the inner tub 3, and the drain plug is opened as necessary. Thus, these precipitates can be easily discharged together with the developer into the outer tank 4 and filtered through the filter tank 2.

It is the schematic which shows an example of the water development type photosensitive resin plate-making apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing-out tank 2 Filtration tank 3 Inner tank 4 Outer tank 5 Plate material 6 Brush 7 Washing-out apparatus 8 Valve 9 Discharge pipe 10 Permeable plate 11 Filter 12 Reflux pump 13 Reflux pipe 14 Liquid level sensor

Claims (4)

A washing tank having a double structure of an inner tank equipped with a washing device and an outer tank that receives the developer overflowed from the inner tank;
A filtration tank for receiving and filtering the developer discharged from the outer tank of the washing tank;
A water-developable photosensitive resin plate making apparatus, comprising: a reflux pump for washing out the developer filtered in the filtration tank and refluxing it to the inner tank of the tank.   The filtration tank is provided with a water permeable plate that divides the inside up and down, and a sheet-like filter that covers the water permeable plate. The developer discharged from the outer tank of the washing tank is received in the upper part of the filter, and the filter and the water permeable plate are installed. The water developing type photosensitive resin plate making apparatus according to claim 1, wherein the developer that has permeated and dropped to the lower part can be supplied from the bottom to the reflux pump.   The water developing type photosensitive resin plate making apparatus according to claim 1 or 2, further comprising a liquid level sensor for stopping the reflux pump when the liquid level falls below a predetermined position at the bottom of the filtration tank.   The water developing type photosensitive resin plate making apparatus according to any one of claims 1 to 3, wherein an upper portion of the filtration tank is opened.

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