Water circulation device for developing screen printing plate

Abstract

The utility model relates to the technical field of silk-screen printing, in particular to a water circulation device for developing a silk-screen printing plate, which comprises a plate flushing area and a developing pool communicated with each other, the plate flushing area comprises a plate flushing table, a primary filter pool and a secondary filter pool, the primary filter pool and the secondary filter pool are arranged below the plate flushing table, one side of the secondary filter pool is communicated with the developing pool, and the other side of the secondary filter pool is communicated with the developing pool. The plate flushing table is communicated with the first-stage filter tank through a first filter arranged above the first-stage filter tank, the second-stage filter tank is communicated with the first-stage filter tank through a second filter arranged on the side face of the first-stage filter tank, and plate flushing sewage is filtered by the first filter and the second filter in sequence and then filtered by the second filter. One part is stored in the secondary filter tank for the high-pressure water gun to take water, and the other part flows into the developing tank to supplement developing water components. The device has the effect of saving the water consumption for silk screen plate making.

Description

Technical Field

[0001] The present application relates to the technical field of silk screen printing plate making, and in particular to a water circulation device for silk screen screen development. Background Art

[0002] Screen printing is a traditional and widely used printing technology that uses a screen to squeeze ink through a scraper and penetrate it into the substrate. It has the advantages of wide adaptability, large printing area, and thick ink layer. It is suitable for printing needs of various materials and shapes and has huge market potential.

[0003] Before screen printing, it is necessary to make a plate according to actual needs. The quality of the screen determines the final printing effect. The screen printing plate making process includes the following steps: 1. Stretch the screen; 2. Apply photosensitive glue on the screen and dry it; 3. Fix the dried screen on the engraving machine for exposure; 4. Soak the exposed screen in the developing tank to dissolve the photosensitive glue in the unexposed part; 5. Place the developed screen on the plate-developing table with a backlight and rinse it with a high-pressure water gun; 6. Shape and dry the rinsed screen to obtain the finished screen.

[0004] When washing with a high-pressure water gun, a large amount of clean water is required. The wastewater after washing mainly contains a small amount of photosensitive adhesive residues, suspended solids, etc. The wastewater will flow into the wastewater collection system through the drainage trough set under the plate processing table and be discharged after environmental protection treatment. Due to the large plate-making volume of the factory, the amount of wastewater generated is also large, and the water component in the wastewater accounts for about 90-95% of the total wastewater volume. The existing treatment method is relatively wasteful of water resources and there is still room for optimization. Utility Model Content

[0005] In order to save water in screen printing, the present application provides a water circulation device for screen printing screen development.

[0006] The water circulation device for screen printing screen development provided in the present application adopts the following technical solution:

[0007] A water circulation device for screen printing development, comprising a plate processing area and a developing tank connected to each other, the plate processing area comprising a plate processing table and a primary filtering tank arranged below the plate processing table, the plate processing table comprising an outer shell with an opening on one side, a backlight, a water leakage table and a first filter are arranged in sequence from top to bottom inside the outer shell, the backlight is arranged at the upper end of the water leakage table and away from the side of the outer shell opening, the upper end of the first filter covers the lower end of the water leakage table, and one side of the primary filtering tank is connected to the developing tank.

[0008] By adopting the above technical scheme, considering that in the wastewater after washing the plate processing station, the water component accounts for about 90%-95% of the total wastewater, and the rest is a small amount of photosensitive resin residues, suspended solids, etc., among which the photosensitive paste used for plate making is insoluble in water, and the suspended solids are also insoluble in water; at the same time, the liquid in the developing tank is clean water, and a small amount of water in the developing tank will be consumed during each development; based on the above two points, the present application connects the developing tank with the plate processing area, and the wastewater is initially filtered through the first filter and finally flows into the developing tank. While replenishing the water in the developing tank, the wastewater is recycled, saving a lot of water resources, and the plate making quality can be guaranteed by changing the water in the developing tank once a week.

[0009] Optionally, the first filter includes a V-shaped guide plate connected to the lower end of the leaking table top and a filter layer arranged at the lower end of the V-shaped guide plate.

[0010] By adopting the above technical solution, the V-shaped design can guide the liquid to the filter layer, avoiding the problem of liquid dispersion flow that may exist in the flat guide plate. The V-shaped structure allows the liquid dripping from the leaking table to form a water column, thereby enhancing the water pressure and further promoting filtration. Overall, the filtration efficiency is effectively improved.

[0011] Optionally, the plate processing area also includes a secondary filter pool connected between the primary filter pool and the developing pool, the outer side of the primary filter pool is connected to a second filter, and the primary filter pool is connected to the secondary filter pool through the second filter.

[0012] By adopting the above technical solution, there are two levels of filtration in the plate processing area, and further filtration is performed in the secondary filtration tank to further reduce the content of suspended solids and photosensitive resin residues in the water flowing into the developing tank, thereby reducing pollution to the developing tank.

[0013] Optionally, the secondary filtration tank is used to supply water to a high-pressure water gun for flushing the wire mesh.

[0014] By adopting the above technical solution, the wastewater is filtered through the first filter and the second filter. At this time, the main components of the wastewater are water, very small amounts of photosensitive resin residues and suspended solids, while the main components of the screen before washing are photosensitive resin, dyes, etc. Using the wastewater at this time for washing can effectively save water resources and is not easy to contaminate the screen.

[0015] Optionally, the side wall of the secondary filter tank is connected to a water pipe, a water storage distance is left between the water pipe and the bottom of the secondary filter tank, the secondary filter tank is connected to the developing tank through the water pipe, and the water outlet of the water pipe is higher than the liquid level in the developing tank.

[0016] By adopting the above technical solution, the water supply pipe is not connected to the bottom of the secondary filtration tank, but a water storage space is left. On the one hand, it is convenient for the high-pressure water gun to take water. On the other hand, since the photosensitive glue is insoluble in water and the density of the photosensitive glue is greater than that of water, the water storage space can also play the role of allowing the liquid to settle. Only the supernatant flows into the developing tank from the water supply pipe.

[0017] Optionally, the water storage distance between the water pipe and the secondary filter tank is ≥10cm.

[0018] Optionally, the developing tank and the secondary filtering tank are placed in the same plane.

[0019] In summary, the beneficial technical effects of this application are as follows:

[0020] Considering that in the wastewater after washing the plate processing station, water accounts for about 90%-95% of the total wastewater, and the rest is a small amount of photosensitive resin residue, suspended solids, etc., among which the photosensitive paste used for plate making is insoluble in water, and the suspended solids are also insoluble in water; at the same time, a small amount of water in the developing tank will be consumed during each development; based on the above two points, the present application connects the developing tank with the plate processing area, and sets a primary filter tank and a secondary filter tank between the developing tank and the plate processing station. After the wastewater is filtered through the two-stage filter, a part of the wastewater remains in the secondary filter tank for water extraction by the high-pressure water gun, and the other part of the wastewater flows into the developing tank to replenish the developer content in the developing tank, thereby realizing the recycling of wastewater and saving a lot of water resources. The quality of plate making can be guaranteed by changing the water in the developing tank once a week. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the coordination of the water circulation device used for screen printing screen development in the embodiment of the present application.

[0022] Explanation of the reference numerals: 1. Plate processing area; 2. Developing tank; 3. Plate processing table; 31. Housing; 32. Backlight; 33. Leakage table; 34. First filter; 341. V-shaped guide plate; 342. Filter layer; 4. Primary filter tank; 41. Second filter; 5. Secondary filter tank; 51. Water pipe; 6. Working area. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1 This application is described in further detail.

[0024] The present application embodiment discloses a water circulation device for screen printing screen development. Figure 1 The water circulation device for screen printing screen development comprises two parts, a plate processing area 1 and a developing pool 2, which are connected to each other, and the upper end of the developing pool 2 is open.

[0025] The plate processing area 1 includes a plate processing station 3, a primary filter pool 4 and a secondary filter pool 5. The primary filter pool 4 and the secondary filter pool 5 are connected and are both located below the plate processing station 3 to filter the sewage from the plate processing station 3. One side of the secondary filter pool 5 is connected to the developing pool 2. The filtered wastewater is filtered through the primary filter pool 4 and the secondary filter pool 5 in turn, and then enters the developing pool 2 for recycling. The plate processing station 3, the primary filter pool 4, the secondary filter pool 5, and the developing pool 2 can be designed to have a height difference step by step. In the embodiment of the present application, the four are placed at the same height as an example.

[0026] The plate processing station 3 includes a housing 31 with an opening on one side, and the opening side of the housing 31 is a working area 6, which is defined as the front side. The primary filter pool 4 is placed directly below the plate processing station 3, and the secondary filter pool 5 can be set arbitrarily. In order to avoid affecting the plate processing operation, it is sufficient to ensure that the secondary filter pool 5 is not set on the front side of the primary filter pool 4. This application takes the secondary filter pool 5 being set on the rear side of the primary filter pool 4 as an example. Similarly, the developing pool 2 can be set on any side of the secondary filter pool 5, and this application takes the secondary filter pool 5 being set on the rear side as an example.

[0027] The housing 31 is provided with a backlight 32 and a water leakage table 33 from top to bottom. The backlight 32 is installed on the upper end of the water leakage table 33 and on the side away from the working area 6. The installation method and working principle of the housing 31, the backlight 32 and the water leakage table 33 are the same as those of the existing plate processing table 3, and will not be repeated here.

[0028] The leaking table 33 is shown as a screen mesh plate. A first filter 34 is installed at the lower end of the leaking table 33, and the first filter 34 completely covers all the leaking holes of the leaking table 33. The primary filter pool 4 can be designed to be integrated with the housing 31, that is, the upper end of the primary filter pool 4 is completely attached to the lower end of the leaking table 33; it can also be designed as a detachable box in a conventional plate punching table 3, in which case an empty area is left between the upper end of the primary filter pool 4 and the lower end of the leaking table 33. This application is shown as the former.

[0029] In a specific embodiment, the first filter 34 is a flat plate with a certain empty space between it and the lower end of the leaking table 33. The flat plate can be provided with holes for filtering solids, or the flat plate is a filter layer 342, including an upper and lower multi-layer filter system, which includes any one or more of the following filter structures from top to bottom: 1. A coarse filter layer, composed of coarse sand, gravel or metal mesh, used to filter out large pieces of photosensitive resin residues and larger suspended solids in the wastewater; 2. A medium filter layer, composed of fine sand, fine fiber filter cloth or non-woven fabric, used to filter out smaller photosensitive resin particles and medium-sized suspended solids in the wastewater; 3. A fine filter layer, composed of activated carbon, ultrafine fiber filter cloth or microfiltration membrane, used to adsorb dissolved soluble organic matter, pigments and dyes, etc.

[0030] In another specific embodiment, the first filter 34 includes a V-shaped guide plate 341 fixed to the lower end of the water leakage table 33 by bolts and a filter layer 342 installed at the lower end of the V-shaped guide plate 341. The filter layer 342 can be provided with holes for filtering solids, or it can be an upper and lower multi-layer filter system as in the previous specific embodiment.

[0031] In the embodiment of the present application, it is taken as an example that the first filter 34 includes a V-shaped guide plate 341 and a filter layer 342 , and the filter layer 342 is only a coarse filter layer.

[0032] The rear side of the primary filter pool 4 is connected to a second filter 41, and the primary filter pool 4 is connected to the secondary filter pool 5 through the second filter 41. The filtering structure of the second filter 41 is similar to that of the first filter 34, and the specific embodiment mentioned above can be referred to. In the embodiment of the present application, the second filter 41 is a side-opening faucet shape, and the filtering structure in the second filter 41 is a middle filter layer.

[0033] The wastewater is filtered through the first filter 34 and the second filter 41. At this time, the main components of the wastewater are water, very small amounts of photosensitive resin residues and very fine suspended solids. Therefore, the secondary filter tank 5 can be used to supply water to the high-pressure water gun for washing the screen, and the water intake pipe of the high-pressure water gun extends to the bottom of the secondary filter tank 5.

[0034] The side wall of the secondary filter pool 5 is connected with a water pipe 51, and a water storage gap is left between the water pipe 51 and the bottom of the secondary filter pool 5. In order to facilitate water extraction by a high-pressure water gun, the water storage gap is ≥10cm. Since the liquid height in the developing pool 2 is generally 5-15cm, the liquid capacity in the developing pool 2 is controlled. When the secondary filter pool 5 is connected to the developing pool 2 through the water pipe 51, the water outlet of the water pipe 51 is higher than the liquid level in the developing pool 2. Since the photosensitive glue is insoluble in water and the density of the photosensitive glue is greater than that of water, the water storage gap 52 can also play the role of allowing liquid sedimentation. Only the supernatant flows into the developing pool 2 from the water pipe 51, reducing the introduction of impurities in the developing pool 2.

[0035] The implementation principle of a water circulation device for screen printing screen development in an embodiment of the present application is as follows: the waste water after screen printing is filtered step by step by the first filter 34 and the second filter 41, and the main components of the remaining waste water are water, a very small amount of photosensitive resin residue and a very small amount of suspended solids. The filtered waste water is collected in the secondary filter tank 5 for sedimentation.

[0036] At this time, the wastewater in the secondary filter tank 5 can be directly used for plate processing to achieve water recycling; at the same time, the water above the water pipe 51 will flow into the developing tank 2 to replenish the developer content in the developing tank 2.

[0037] By coordinating the development and plate washing processes, the waste water can be recycled and a large amount of water resources can be saved. The plate making quality can be guaranteed by simply changing the water in the developing tank 2 once a week.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A water circulation device for screen printing development, characterized in that: The invention comprises a plate processing area (1) and a developing tank (2) which are connected. The plate processing area (1) comprises a plate processing platform (3) and a primary filtering tank (4) arranged below the plate processing platform (3). The plate processing platform (3) comprises a shell (31) with an opening on one side. A backlight (32), a water leakage table (33) and a first filter (34) are arranged in sequence from top to bottom inside the shell (31). The backlight (32) is arranged at the upper end of the water leakage table (33) and at a side away from the opening side of the shell (31). The upper end of the first filter (34) covers the lower end of the water leakage table (33). One side of the primary filtering tank (4) is connected to the developing tank (2).

2. A water circulation device for screen printing development according to claim 1, characterized in that: The first filter (34) comprises a V-shaped guide plate (341) connected to the lower end of the water leakage table (33) and a filter layer (342) arranged at the lower end of the V-shaped guide plate (341).

3. The water circulation device for screen printing development according to claim 1, characterized in that: The plate processing area (1) further comprises a secondary filter pool (5) connected between the primary filter pool (4) and the developing pool (2); the outer side of the primary filter pool (4) is connected to a second filter (41); the primary filter pool (4) is connected to the secondary filter pool (5) via the second filter (41).

4. A water circulation device for screen printing development according to claim 3, characterized in that: The secondary filtering pool (5) is used to supply water to a high-pressure water gun for flushing the wire mesh.

5. A water circulation device for screen printing development according to claim 4, characterized in that: The side wall of the secondary filter pool (5) is connected to a water pipe (51), a water storage distance is left between the water pipe (51) and the bottom of the secondary filter pool (5), the secondary filter pool (5) is connected to the developing pool (2) through the water pipe (51), and the water outlet of the water pipe (51) is higher than the liquid level in the developing pool (2).

6. A water circulation device for screen printing development according to claim 5, characterized in that: The water storage distance between the water delivery pipe (51) and the secondary filter pool (5) is ≥10 cm.

7. The water circulation device for screen printing development according to claim 5, characterized in that: The developing tank (2) and the secondary filtering tank (5) are arranged in a plane.

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