Corona roller for EVA film printing

Abstract

The utility model relates to a corona roller for EVA (Ethylene Vinyl Acetate) film printing, in particular to the technical field of printing equipment. The corona roller comprises a corona roller body, an annular outer ring, a cold air inlet, cold air pipes, an exhaust pipe, an induced draft fan and a heat exchange mechanism, a plurality of cold air pipes are annularly distributed on the inner wall of the corona roller body at equal intervals, cold air exhaust holes are transversely formed in the tops and the bottoms of the cold air pipes, the cold air pipes are strip-shaped pipes, and the cold air exhaust holes are formed in the outer ring of the corona roller body. Cold air can be evenly distributed and cover the whole inner wall of the corona roller body, the inner wall of the corona roller is evenly and comprehensively cooled, the finished product quality of an EVA film is guaranteed, hot air in the corona roller body is exhausted from the exhaust pipe and enters the spiral pipe in the cooling cylinder, the hot air in the spiral pipe exchanges heat with cooling water and then is exhausted from the exhaust port, and the cooling effect is improved. Cooling water absorbs heat in hot air to be converted into hot water and then enters the water collecting tank to be collected under the action of the water pump, heat recovery is achieved, and environmental pollution is reduced.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to a corona roller for EVA film printing. Background Technology

[0002] EVA film is widely used in packaging, printing, and other fields due to its excellent flexibility and transparency. During the printing process of EVA film, corona treatment is usually required to improve ink adhesion. To protect the EVA film from heat damage during corona treatment, a cooling mechanism is typically installed inside the corona roller. However, existing cooling mechanisms cannot achieve uniform and comprehensive cooling of the inner wall of the corona roller, affecting the quality of the finished EVA film. Utility Model Content

[0003] (1) Technical problems to be solved

[0004] This invention provides a corona roller for EVA film printing, which overcomes the shortcomings of existing corona rollers where the internal cooling mechanism cannot achieve uniform and comprehensive cooling of the inner wall of the corona roller, thus affecting the finished quality of the EVA film.

[0005] (2) Technical solution

[0006] To solve the above-mentioned technical problems, this utility model provides a corona roller for EVA film printing, including a corona roller body, an annular outer ring, a cold air inlet, a cold air pipe, an exhaust pipe, a blower, and a heat exchange mechanism. The annular outer ring is provided at one end of the corona roller body, and an annular air cavity is formed inside the annular outer ring. A plurality of cold air pipes are distributed annularly at equal intervals on the inner wall of the corona roller body. One end of the cold air pipe is connected to the annular air cavity. The annular outer ring is provided with a cold air inlet connected to the annular air cavity. Cold air exhaust holes are opened laterally on the top and bottom of the cold air pipe. The other end of the corona roller body is connected to the heat exchange mechanism through the exhaust pipe, and an exhaust pipe is provided with a blower.

[0007] Preferably, the cooling pipe is a strip pipe.

[0008] Preferably, the cold air exhaust hole is a strip-shaped hole.

[0009] Preferably, the heat exchange mechanism includes a cooling cylinder, a fixed rod, a spiral tube, a water pump, and a water collection tank. The cooling cylinder has a water inlet at the top of one end and a water outlet at the bottom of the other end. The fixed rod is arranged horizontally inside the cooling cylinder. The spiral tube is wound around the outer wall of the fixed rod. One end of the spiral tube is an air inlet, and the other end of the spiral tube is an exhaust outlet extending to the outside of the cooling cylinder. The water outlet is connected to one end of the water pump through a pipe, and the other end of the water pump is connected to the water collection tank through a pipe.

[0010] Preferably, one end of the exhaust pipe is connected to the other end of the corona roller body, the other end of the exhaust pipe is connected to one end of the induced draft fan, and the other end of the induced draft fan is connected to the air inlet through a pipe.

[0011] (3) Beneficial effects

[0012] This invention provides a corona roller for EVA film printing, overcoming the shortcomings of existing corona rollers where the internal cooling mechanism cannot achieve uniform and comprehensive cooling of the inner wall, thus affecting the quality of the finished EVA film. Compared with the prior art, this invention has the following advantages:

[0013] 1. Several cooling air pipes are evenly distributed in a ring on the inner wall of the corona roller body. Cooling air exhaust holes are opened horizontally on the top and bottom of the cooling air pipes. The cooling air pipes are strip-shaped pipes and the cooling air exhaust holes are strip-shaped holes. This arrangement can make the cooling air evenly distributed and cover the entire inner wall of the corona roller body, so as to achieve uniform and comprehensive cooling of the inner wall of the corona roller and ensure the quality of the finished EVA film.

[0014] 2. The cold air inside the corona roller body absorbs the heat from the inner wall of the corona roller body and converts it into hot air. After being discharged from the exhaust pipe, it enters the spiral tube inside the cooling cylinder. Cooling water is then transported into the cooling cylinder through the water inlet. The hot air in the spiral tube exchanges heat with the cooling water and is discharged from the exhaust port. The cooling water absorbs the heat from the hot air and is converted into hot water. Then, under the action of the water pump, it enters the water collection tank for collection, realizing heat recovery and reducing environmental pollution. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of one end face of the corona roller body of this utility model.

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0018] Figure 4 This is a three-dimensional structural diagram of the internal structure of the corona roller body of this utility model.

[0019] Figure 5 This is a schematic diagram of the heat exchange mechanism of this utility model.

[0020] The attached diagram is labeled as follows: 1-corona roller body, 2-annular outer ring, 21-annular air chamber, 3-cold air inlet, 4-cold air pipe, 41-cold air outlet, 5-exhaust pipe, 6-expelled fan, 7-heat exchange mechanism, 71-cooling cylinder, 711-water inlet, 712-water outlet, 72-fixed rod, 73-spiral tube, 731-air inlet, 732-exhaust outlet, 74-water pump, 75-water collection tank. Detailed Implementation

[0021] The present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0022] like Figures 1-5 As shown, the corona roller for EVA film printing according to this utility model includes a corona roller body 1, an annular outer ring 2, a cold air inlet 3, a cold air pipe 4, an exhaust pipe 5, a blower 6, and a heat exchange mechanism 7. The annular outer ring 2 is provided on one end of the corona roller body 1, and an annular air cavity 21 is formed inside the annular outer ring 2. A plurality of cold air pipes 4 are distributed annularly at equal intervals on the inner wall of the corona roller body 1. One end of the cold air pipe 4 is connected to the annular air cavity 21. The annular outer ring 2 is provided with a cold air inlet 3 connected to the annular air cavity 21. Cold air exhaust holes 41 are opened laterally on the top and bottom of the cold air pipe 4. The other end of the corona roller body 1 is connected to the heat exchange mechanism 7 through the exhaust pipe 5. The blower 6 is provided on the exhaust pipe 5. The blower 6 helps to quickly exhaust the hot air inside the corona roller body 1.

[0023] The cooling pipe 4 is a strip-shaped pipe, and the cooling exhaust hole 41 is a strip-shaped hole. The heat exchange mechanism 7 includes a cooling cylinder 71, a fixing rod 72, a spiral tube 73, a water pump 74, and a water collection tank 75. The cooling cylinder 71 has a water inlet 711 at the top of one end and a water outlet 712 at the bottom of the other end. The fixing rod 72 is arranged horizontally inside the cooling cylinder 71. The spiral tube 73 is wound around the outer wall of the fixing rod 72. One end of the spiral tube 73 is an air inlet 731, and the other end of the spiral tube 73 is an exhaust outlet 732 that extends to the outside of the cooling cylinder 71. The water outlet 712 is connected to one end of the water pump 74 through a pipe, and the other end of the water pump 74 is connected to the water collection tank 75 through a pipe.

[0024] One end of the exhaust pipe 5 is connected to the other end of the corona roller body 1, and the other end of the exhaust pipe 5 is connected to one end of the induced draft fan 6. The other end of the induced draft fan 6 is connected to the air inlet 731 through a pipe.

[0025] In actual operation, when the inner wall of the corona roller body 1 needs cooling, cold air is supplied to the annular air chamber 21 through the cooling inlet 3. The cold air enters each cold air pipe 4 and is discharged from the cold air outlet 41 to cool the inner wall of the corona roller body 1. At the same time, the induced draft fan 6 is turned on. The cold air in the corona roller body 1 absorbs the heat of the inner wall of the corona roller body 1 and is converted into hot air. After being discharged from the exhaust pipe 5, it enters the spiral tube 73 in the cooling cylinder 71. Cooling water is supplied to the cooling cylinder 71 through the water inlet 711. The hot air in the spiral tube 73 exchanges heat with the cooling water and is discharged from the exhaust port 732. After a period of time, the cooling water absorbs the heat from the hot air and is converted into hot water. Then, under the action of the water pump 74, it enters the water collection tank 75 for collection. The water pump 74 realizes the flow of cooling water in the cooling cylinder 71 and accelerates the heat exchange efficiency. The inner wall of the corona roller body 1 is circumferentially and equidistantly distributed with several cooling air pipes 4. Each cooling air pipe 4 has a horizontally oriented cooling air discharge hole 41 at its top and bottom. The cooling air pipes 4 are strip-shaped, and the cooling air discharge holes 41 are strip-shaped holes. This arrangement allows for uniform distribution of cooling air, covering the entire inner wall of the corona roller body 1, achieving uniform and comprehensive cooling of the inner wall of the corona roller, and ensuring the quality of the finished EVA film. Content not described in detail in this specification is prior art known to those skilled in the art.

[0026] The embodiments described above are merely preferred embodiments of the present invention, and are described in a relatively specific and detailed manner. However, the present invention is not limited to these embodiments. It should be noted that for those skilled in the art, any improvements made without departing from the spirit of the present invention fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A corona roller for EVA film printing, characterized in that, The device includes a corona roller body (1), an annular outer ring (2), a cold air inlet (3), a cold air pipe (4), an exhaust pipe (5), an induced draft fan (6), and a heat exchange mechanism (7). The annular outer ring (2) is provided on one end of the corona roller body (1). An annular air cavity (21) is formed inside the annular outer ring (2). Several cold air pipes (4) are distributed annularly at equal intervals on the inner wall of the corona roller body (1). One end of the cold air pipe (4) is connected to the annular air cavity (21). The cold air inlet (3) is provided on the annular outer ring (2) and is connected to the annular air cavity (21). Cold air exhaust holes (41) are opened laterally on the top and bottom of the cold air pipe (4). The other end of the corona roller body (1) is connected to the heat exchange mechanism (7) through the exhaust pipe (5). An induced draft fan (6) is provided on the exhaust pipe (5).

2. The corona roller for EVA film printing according to claim 1, characterized in that, The air conditioning pipe (4) is a strip pipe.

3. The corona roller for EVA film printing according to claim 1, characterized in that, The cold air exhaust hole (41) is a strip-shaped hole.

4. The corona roller for EVA film printing according to claim 1, characterized in that, The heat exchange mechanism (7) includes a cooling cylinder (71), a fixing rod (72), a spiral tube (73), a water pump (74), and a water collection tank (75). The cooling cylinder (71) has a water inlet (711) at the top of one end and a water outlet (712) at the bottom of the other end. The fixing rod (72) is arranged horizontally inside the cooling cylinder (71). The spiral tube (73) is wound around the outer wall of the fixing rod (72). One end of the spiral tube (73) is an air inlet (731), and the other end of the spiral tube (73) is an exhaust outlet (732) that extends to the outside of the cooling cylinder (71). The water outlet (712) is connected to one end of the water pump (74) through a pipe, and the other end of the water pump (74) is connected to the water collection tank (75) through a pipe.

5. The corona roller for EVA film printing according to claim 4, characterized in that, One end of the exhaust pipe (5) is connected to the other end of the corona roller body (1), and the other end of the exhaust pipe (5) is connected to one end of the blower (6). The other end of the blower (6) is connected to the air inlet (731) through a pipe.

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