Circulating cooling system for dried film

Abstract

The utility model discloses a circulating cooling system after film drying, which comprises a cooling section drying box, an air inlet fan and a surface air cooler, the side face of the cooling section drying box is connected with an air return pipe, the other end of the air return pipe is connected to an air inlet of the air inlet fan, and an air outlet of the air inlet fan is connected to an air inlet of the surface air cooler. An air outlet of the surface air cooler is connected with the side face of the cooling section drying box through an air inlet pipeline. The air return pipe and the air inlet pipeline communicate with the interior of the cooling section drying box. The hot air in the cooling section drying box is cooled through a surface air cooler, so that the air temperature of the cooling section drying box is kept at about 20 DEG C; the air temperature can be adjusted through the flow of cooling water entering the surface air cooler and the ventilation quantity of the surface air cooler; and cooling air cooled by the surface air cooler is fed into the drying oven again through the fan to cool the material, so that internal circulation of the cooling air is realized, and no air is exhausted.

Description

Technical Field

[0001] The utility model belongs to the technical field of foil coating machine drying, and in particular relates to a post-drying circulating cooling system for a film. Background Art

[0002] After the foil is coated, it needs to be dried in a high-temperature drying oven. The temperature of the foil is relatively high. After the foil comes out of the oven, it contacts the normal temperature guide roller. Due to the characteristics of thermal expansion and contraction of the material, the foil undergoes plastic deformation and is prone to wrinkling. To solve this problem, the equipment generally adds a section of air-cooled cooling drying oven to reduce the temperature of the material to room temperature. To achieve this goal, there are usually two ways: the first way is to use a fan to directly extract fresh air from the equipment heater space as cooling air and blow it into the cooling drying oven to cool the material. However, in this case, if the equipment is running for a long time, the air in the space where the heater is located will increase due to the surface heat dissipation of the heating device in the adjacent space, so that the air temperature entering the cooling drying oven will also increase, and it cannot play a good cooling role; the second way is to directly extract filtered and dehumidified normal temperature air from the outside, so that the cooling temperature can be guaranteed, but the temperature will change with the environment and cannot be controlled, and it will increase the manufacturing cost, increase a large amount of ineffective exhaust, and thus increase the exhaust processing volume. Utility Model Content

[0003] The utility model aims to provide a circulating cooling system for a film after drying, which realizes the internal circulation of cooling air without exhausting air.

[0004] The purpose of the utility model is achieved through the following technical means: a post-drying circulating cooling system for a film, comprising a cooling section drying box, an air inlet fan and a surface cooler, a return air duct is connected to the side of the cooling section drying box, the other end of the return air duct is connected to the air inlet of the air inlet fan, the air outlet of the air inlet fan is connected to the air inlet of the surface cooler, the air outlet of the surface cooler is connected to the side of the cooling section drying box through an air inlet duct, and the return air duct and the air inlet duct are both connected to the interior of the cooling section drying box.

[0005] A first pipeline is also provided, one end of which is connected to the air outlet of the air inlet fan, and the other end of which is connected to the air inlet of the surface cooler.

[0006] The return air duct connection is located at the end of the cooling section drying box, and the inlet air duct connection is located at the front end of the cooling section drying box.

[0007] The diameter of the first pipeline gradually increases from the air inlet fan to the surface cooler.

[0008] The surface cooler is a water-cooled surface cooler.

[0009] The surface cooler comprises a water outlet and a water inlet, wherein the water outlet is located above the water inlet.

[0010] The beneficial effects of the utility model are as follows: the hot air of the drying box in the cooling section is cooled by the surface cooler, so that the air temperature of the drying box in the cooling section is maintained at about 20°C; the air temperature can be adjusted by the flow rate of cooling water entering the surface cooler and the ventilation volume of the surface cooler; the cooling air after cooling by the surface cooler is sent into the drying box again by the fan to cool the material, thereby realizing the internal circulation of the cooling air without exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of a circulating cooling system after drying of a film;

[0012] In the figure, 1 is the air inlet fan; 2 is the first pipeline; 3 is the surface cooler; 3-1 is the water outlet; 3-2 is the water inlet; 4 is the air inlet pipeline; 5 is the cooling section drying box; 6 is the return air duct;

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0014] [Example 1]

[0015] like Figure 1 As shown, a post-drying circulating cooling system for a film comprises a cooling section drying box 5, an air inlet fan 1 and a surface cooler 3. A return air duct 6 is connected to the side of the cooling section drying box 5, and the other end of the return air duct 6 is connected to the air inlet of the air inlet fan 1. The air outlet of the air inlet fan 1 is connected to the air inlet of the surface cooler 3. The air outlet of the surface cooler 3 is connected to the side of the cooling section drying box 5 through the air inlet duct 4. The return air duct 6 and the air inlet duct 4 are both connected to the inside of the cooling section drying box 5.

[0016] The air inlet of the air inlet fan 1 is connected with the inside of the cooling section drying box 5 through the return air duct 6, and the air outlet is connected to the air inlet of the surface cooler 3 to cool the air. The cooled air is blown into the cooling section drying box 5 through the air inlet duct 4 to cool the foil. The heated air in the cooling section drying box 5 is drawn out from the return air duct 6 and cooled again, so that the circulating air in the cooling section drying box 5 is realized. There is no need to draw filtered and dehumidified normal temperature air from the outside, and it will not affect the temperature in the room where the cooling section drying box 5 is located, thereby reducing the filtering cost of outdoor air extraction and reducing ineffective exhaust.

[0017] The air volume can be easily adjusted by controlling the speed of the air inlet fan 1 via a frequency converter.

[0018] A first pipeline 2 is also provided, one end of which is connected to the air outlet of the air inlet fan 1 , and the other end of which is connected to the air inlet of the surface cooler 3 .

[0019] The diameter of the first pipeline 2 gradually increases from the air inlet fan 1 to the surface cooler 3.

[0020] The different diameters of the two ends of the first pipe 2 can adapt to the air inlets of the surface cooler 3 of different sizes, while slowing down the air flow rate in the first pipe 2 and increasing the contact area with the surface cooler 3, thereby improving the air cooling effect.

[0021] The connection point of the return air duct 6 is located at the end of the cooling section drying box 5, and the connection point of the air inlet duct 4 is located at the front end of the cooling section drying box 5.

[0022] The air inlet duct 4 is used to transport cold air, and is therefore located at the front end of the side of the cooling section drying box 5, that is, the foil feeding direction. The return air duct 6 is used to extract the heated air, and is located at the rear end of the side of the cooling section drying box 5, that is, the discharge direction. Cold air is blown in from the feed direction to cool and dry the foil, and then the heated air is extracted from the discharge direction for cooling, thereby realizing circulating air in the cooling section drying box 5.

[0023] The surface cooler 3 is a water-cooled surface cooler.

[0024] The surface cooler 3 comprises a water outlet 3-1 and a water inlet 3-2, wherein the water outlet 3-1 is located above the water inlet 3-2.

[0025] The cooler 3 is a water-cooled cooler. The exhaust air of the air inlet fan 1 exchanges heat with cold water in the cooler 3 to cool it down. The water outlet 3-1 is located above the cooler 3 and the water inlet 3-2 is located below to ensure that the cooler 3 is filled with cooling water.

Claims

1. A post-drying circulating cooling system for a film, characterized in that: The invention comprises a cooling section drying box (5), an air inlet fan (1) and a surface cooler (3); a return air duct (6) is connected to the side of the cooling section drying box (5); the other end of the return air duct (6) is connected to the air inlet of the air inlet fan (1); the air outlet of the air inlet fan (1) is connected to the air inlet of the surface cooler (3); the air outlet of the surface cooler (3) is connected to the side of the cooling section drying box (5) through an air inlet duct (4); and the return air duct (6) and the air inlet duct (4) are both connected to the interior of the cooling section drying box (5).

2. The post-drying circulating cooling system of a film according to claim 1, characterized in that: A first pipeline (2) is also provided, one end of the first pipeline (2) being connected to the air outlet of the air inlet fan (1), and the other end of the first pipeline (2) being connected to the air inlet of the surface cooler (3).

3. The post-drying circulating cooling system of a film according to claim 1, characterized in that: The connection point of the return air duct (6) is located at the end of the cooling section drying box (5), and the connection point of the air inlet duct (4) is located at the front end of the cooling section drying box (5).

4. The post-drying circulating cooling system of a film according to claim 2, characterized in that: The diameter of the first pipeline (2) gradually increases in a direction from the air inlet fan (1) to the surface cooler (3).

5. The post-drying circulating cooling system of a film according to claim 1, characterized in that: The surface cooler (3) is a water-cooled surface cooler.

6. The post-drying circulating cooling system of a film according to claim 5, characterized in that: The surface cooler (3) comprises a water outlet (3-1) and a water inlet (3-2), wherein the water outlet (3-1) is located above the water inlet (3-2).

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