Heat flow distribution device for drying oven of coating machine

Abstract

The utility model discloses a heat flow distribution device of a coating machine oven, which relates to the technical field of coating machines and comprises an oven, a conveying unit, an air return unit and hot air units, the conveying unit, the air return unit and the hot air units are arranged in the oven, the two hot air units are obliquely and oppositely arranged in the oven, each hot air unit comprises a hot air uniform distribution box and a plurality of air inlet pipes, and heaters are arranged in the air inlet pipes. The air inlet pipe penetrates through the side wall of the drying oven and is connected with the top face of the hot air uniform distribution box through a vertical pipe, a plurality of hot air holes are formed in the bottom face of the hot air uniform distribution box, the portion, located outside the drying oven, of the air inlet pipe is connected with the hot air motor, the hot air motor is connected with the drying oven through an exhaust pipe, and the tail end of the exhaust pipe extends into the middle of the drying oven. According to the heat flow distribution device for the drying oven of the coating machine, circulating heat flow is formed in the drying oven, so that the drying efficiency is improved, and the energy of the drying oven is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating machines, in particular to a heat flow distribution device for an oven of a coating machine. Background Art

[0002] Coating is an important process in the production process of a substrate. The main process is to evenly and continuously coat the prepared paste-like slurry on the substrate and ensure the consistency of the coating thickness, and control the coating thickness within the tolerance range required by the process. The oven is one of the components of the coating machine and is a device for drying the slurry coated on the substrate. The oven of the coating machine mainly includes a drying chamber, an air duct, a fan, a heating pipe, a control device, etc.

[0003] At present, when drying the coating in the oven of the coating machine, it is necessary to consider the influence of drying temperature, control of drying air flow, drying efficiency, etc. on the drying effect of the coating; expandable coatings such as polyethylene are sensitive to temperature during curing. When the temperature is too high, the tensile strength of the film decreases and shrinkage is likely to occur; improper air flow treatment will also lead to quality problems. For example, uneven air supply or too high exhaust rate will cause the film to vibrate and turn, resulting in poor film quality; and the oven consumes too much energy and the thermal energy utilization rate is not high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a heat flow distribution device for an oven of a coating machine, which improves the drying efficiency by forming a circulating heat flow in the oven and saves the energy of the oven.

[0005] To achieve the above purpose, the utility model provides a heat flow distribution device for an oven of a coating machine, which includes an oven and a conveying unit, a return air unit, and a hot air unit arranged in the oven. Two hot air units are relatively arranged obliquely in the oven. The hot air unit includes a hot air distribution box and a plurality of air inlet pipes. A heater is arranged in the air inlet pipe. The air inlet pipe passes through the side wall of the oven and is connected to the top surface of the hot air distribution box through a vertical pipe. A plurality of hot air holes are arranged on the bottom surface of the hot air distribution box. The part of the air inlet pipe located outside the oven is connected to a hot air motor. The hot air motor is connected to the oven through an exhaust pipe, and the end of the exhaust pipe extends into the middle of the oven.

[0006] Preferably, one end of the hot air distribution box close to the feed port or the discharge port is lower than the end close to the middle of the oven. From the middle of the oven to both ends of the oven, the length of the vertical pipe gradually increases.

[0007] Preferably, the conveying unit includes a base cloth and a plurality of conveying rollers. Both ends of the conveying rollers are rotatably connected to the inner wall of the oven. The base cloth is arranged above the conveying rollers, and the base cloth is parallel to the bottom surface of the hot air distribution box.

[0008] Preferably, a feed inlet is provided on the front end face of the oven, and a discharge outlet is provided on the rear end face of the oven. The substrate cloth enters from the feed inlet and exits from the discharge outlet. The paper stock to be coated is disposed on the substrate cloth, and the paper stock passes between the bottom surface of the oven and the upper end surface of the conveyor roller along with the substrate cloth.

[0009] Preferably, the air return unit includes a middle exhaust fan and an external air supply duct. The middle exhaust fan is disposed at the top middle of the oven, and the external air supply duct is fixed on the outer wall of the oven. The end of the external air supply duct faces the discharge outlet.

[0010] Preferably, a heat insulation layer is wrapped on the outer wall of the oven.

[0011] Preferably, a plurality of temperature sensors are provided on the inner wall of the oven.

[0012] Therefore, the coating machine oven heat flow distribution device of the present utility model adopts the above structure. The hot air unit heats the air in the oven and hot air dries the coated paper stock passing along with the substrate cloth. The exhaust duct extracts the gas at the bottom of the hot air distribution box for heating to form a circulating heat flow, enabling the high-temperature gas to pass through the coated paper stock to improve the drying efficiency. The air return unit transports the high-temperature gas in the middle of the oven to the discharge outlet, facilitating maintaining the temperature of the paper stock in cold weather in winter and facilitating material collection.

[0013] The technical solution of the present utility model will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0014] Figure 1 is the external structure schematic diagram of an embodiment of the coating machine oven heat flow distribution device of the present utility model;

[0015] Figure 2 is the internal structure schematic diagram of an embodiment of the present utility model;

[0016] Figure 3 is another perspective schematic diagram of the internal structure of an embodiment of the present utility model.

[0017] Reference Signs

[0018] 1. Oven; 2. Coated paper stock; 3. Substrate cloth; 4. Middle exhaust fan; 5. External air supply duct; 6. Air inlet duct; 7. Hot air motor; 8. Conveyor roller; 9. Hot air distribution box; 10. Vertical pipe; 11. Exhaust duct. Detailed Embodiment

[0019] The technical solution of the present utility model will be further described below with reference to the drawings and embodiments.

[0020] Embodiment

[0021] As Figures 1-3As shown in the figure, a heat flow distribution device for a coater oven includes an oven 1, a conveying unit, a return air unit, and a hot air unit disposed within the oven 1. The outer wall of the oven 1 is wrapped with a thermal insulation layer to maintain the temperature of the oven 1 and reduce heat loss. A number of temperature sensors are provided on the inner wall of the oven 1 to sense the temperature inside the oven 1 for timely adjustment.

[0022] Two hot air units are relatively disposed within the oven 1 in an inclined manner. The hot air unit includes a hot air distribution box 9 and a number of air inlet pipes 6. A heater is provided within the air inlet pipe 6. The air inlet pipe 6 passes through the side wall of the oven 1 and is connected to the top surface of the hot air distribution box 9 through a vertical pipe 10. The portion of the air inlet pipe 6 located outside the oven 1 is connected to a hot air motor 7. The hot air motor 7 is connected to the oven 1 through an extraction pipe 11, and the end of the extraction pipe 11 extends into the middle of the oven 1. One end of the hot air distribution box 9 near the feed inlet or the discharge outlet is lower than the end near the middle of the oven 1. After the hot air motor 7 is started, the relatively cooler air located in the middle of the oven 1 and far from the hot air distribution box 9 is drawn away through the extraction pipe 11, heated through the heater, and then blown back into the hot air distribution box 9.

[0023] The heater can be a quartz heating lamp tube that is electrified for heating, etc. The heating temperature is controlled by a central controller, and the heating temperature is precisely adjusted according to the temperature, humidity, type of paper stock, and coating retention amount inside the oven.

[0024] The front end face of the oven 1 is provided with a feed inlet, and the rear end face of the oven 1 is provided with a discharge outlet. The conveying unit includes a substrate cloth 3 and a number of conveying rollers 8. Both ends of the conveying roller 8 are rotatably connected to the inner wall of the oven 1. The substrate cloth 3 is disposed above the conveying roller 8. The substrate cloth 3 enters through the feed inlet and exits through the discharge outlet. The paper stock to be coated is disposed on the substrate cloth 3, and the paper stock passes between the bottom surface of the oven 1 and the upper end surface of the conveying roller 8 along with the substrate cloth 3. The substrate cloth 3 is parallel to the bottom surface of the hot air distribution box 9. A number of hot air holes are provided on the bottom surface of the hot air distribution box 9. After the hot air passes through the air inlet pipe 6, the vertical pipe 10, and the hot air distribution box 9, it is evenly blown onto the surface of the coated paper stock 3 through the hot air holes, enabling the coating to dry evenly and preventing the paper stock from wrinkling due to inconsistent drying degrees of the coating.

[0025] Since the length of the vertical pipe 10 gradually increases from the middle of the oven 1 towards both ends of the oven 1, the higher the temperature of the hot air blown out by the hot air distribution box 9 is closer to the middle of the oven 1. The temperature gradient change is gentle during the process of the coated paper stock 3 moving from the feed inlet towards the middle, which is conducive to the uniform condensation and drying of the coating. There is an extraction pipe 11 pumping cold air below the paper stock and hot air is blown out by the hot air distribution box 9 above, forming a rapid air circulation, which can shorten the drying time of the paper stock and accelerate the coating drying process.

[0026] The air return unit includes a middle exhaust fan 4 and an external air supply duct 5. The middle exhaust fan 4 is arranged at the middle top end of the oven 1, and the external air supply duct 5 is fixed on the outer wall of the oven 1. The end of the external air supply duct 5 faces the discharge port. In winter when the overall ambient temperature is relatively low, the middle exhaust fan 4 can send the hot air with a higher temperature to the discharge port through the external air supply duct 5, and blow it onto the paper material just exposed to the external air from the discharge port, avoiding the shrinkage of the paper material due to sudden exposure to cold air.

[0027] Therefore, the heat flow distribution device of the coating machine oven 1 adopting the above structure of the present utility model heats the air in the oven 1 through the hot air unit and hot air dries the coated paper material 3 passing along with the substrate cloth 3. The extraction duct 11 extracts the gas at the bottom of the hot air distribution box 9 for heating, forming a circulating heat flow, enabling the high-temperature gas to pass through the coated paper material 3, improving the drying efficiency. The high-temperature gas in the middle of the oven 1 is transported to the discharge port through the air return unit, facilitating the maintenance of the temperature of the paper material in the cold weather in winter and facilitating the material collection.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present utility model, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present utility model.

Claims

1. A hot flow distribution device for a coater oven, characterized in that: It includes an oven and a hot air unit, a conveying unit, and a return air unit arranged inside the oven. Two hot air units are arranged relatively inclined inside the oven. The hot air unit includes a hot air distribution box and a number of air inlet pipes. A heater is arranged inside the air inlet pipes. The air inlet pipes pass through the side wall of the oven and are connected to the top surface of the hot air distribution box through vertical pipes. A number of hot air pores are arranged on the bottom surface of the hot air distribution box. The part of the air inlet pipe located outside the oven is connected to a hot air motor. The hot air motor is connected to the oven through an air extraction pipe. The end of the air extraction pipe extends into the middle of the oven.

2. The hot flow distribution device of the coating machine oven according to claim 1, characterized in that: One end of the hot air distribution box close to the feed inlet or the discharge outlet is lower than the end close to the middle of the oven. From the middle of the oven to both ends of the oven, the length of the vertical pipe gradually increases.

3. The hot flow distribution device of the coating machine oven according to claim 2, characterized in that: The conveying unit includes a substrate cloth and a number of conveying rollers. Both ends of the conveying rollers are rotatably connected to the inner wall of the oven. The substrate cloth is arranged above the conveying rollers. The substrate cloth is parallel to the bottom surface of the hot air distribution box.

4. The hot flow distribution device of the coating machine oven according to claim 3, wherein: A feed inlet is arranged on the front end face of the oven, and a discharge outlet is arranged on the rear end face of the oven. The substrate cloth enters from the feed inlet and exits from the discharge outlet. The coated paper material is arranged on the substrate cloth. The coated paper material passes between the bottom surface of the oven and the upper end surface of the conveying rollers along with the substrate cloth.

5. The hot flow distribution device of the coater oven according to claim 4, characterized in that: The return air unit includes a middle exhaust fan and an external air supply pipe. The middle exhaust fan is arranged at the top of the middle of the oven. The external air supply pipe is fixed on the outer wall of the oven. The end of the external air supply pipe faces the discharge outlet.

6. The heat flux distribution device of the coating machine oven according to claim 1, characterized in that: The outer wall of the oven is wrapped with a heat insulation layer.

7. The hot flow distribution device for the coating machine oven according to claim 1, characterized in that: A number of temperature sensors are arranged on the inner wall of the oven.

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