Coated film drying device

Abstract

The utility model discloses a kind of coating film double-sided drying device, it is characterized by: including upper oven, lower oven and the several drying air knives being arranged between upper oven and lower oven, the cavity of the upper oven and lower oven is equipped with air inlet chamber and the bottom surface of the cavity is equipped with several air outlet holes, the air inlet chamber includes several oven air distribution plate, several air distribution holes are equipped on the oven air distribution plate, the drying air knife is divided into parallel arrangement upper air knife group and lower air knife group, the drying air knife in the upper air knife group is located above film;The drying air knife in the lower air knife group is located below film, the air inlet of the drying air knife is connected with external air source through corresponding air outlet hole, the air nozzle of the drying air knife is all towards film, and the air nozzle of the drying air knife of the upper air knife group and the air nozzle of the drying air knife of the lower air knife group are staggered arrangement, hot air in the air inlet chamber flows into air outlet hole after passing through oven air distribution plate again through the air nozzle of drying air knife and is blown to film.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment, and in particular to a double-sided drying device for coated films. Background Technology

[0002] The flexible film has a coating on both sides and needs to be dried. The specific drying process is as follows: existing technology first heats the air inside the oven, then pulls the film through the oven and dries it with the heated air. The oven is equipped with an exhaust pipe and an air inlet pipe. Cold air is drawn into the oven through the air inlet pipe and heated, and then the exhaust pipe removes the waste gas from the oven. Although the above drying technology is also a form of hot drying, it is time-consuming and inefficient.

[0003] Therefore, in order to solve the above problems, the applicant has designed a double-sided film dryer to dry the film, thereby improving the drying efficiency and effect. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a double-sided drying device for coated films.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A double-sided drying device for coated films, characterized in that: it includes an upper drying oven, a lower drying oven, and a plurality of drying air knives disposed between the upper and lower drying ovens. Both the upper and lower drying ovens have air inlet chambers and a plurality of air outlet holes on their bottom surfaces. Each air inlet chamber includes a plurality of oven air distribution plates, each with a plurality of air distribution holes. The drying air knives are divided into an upper air knife group and a lower air knife group arranged in parallel. The drying air knives in the upper air knife group are located above the film; the drying air knives in the lower air knife group are located below the film. The air inlets of the drying air knives are connected to an external air source through corresponding air outlet holes. The nozzles of the drying air knives all face the film, and the nozzles of the drying air knives in the upper and lower air knife groups are staggered. Hot air entering the air inlet chamber flows through the oven air distribution plates into the air outlet holes and then through the nozzles of the drying air knives towards the film.

[0007] The drying air knife has an air cavity, and the air cavity is provided with an air knife uniform plate. The air knife uniform plate is provided with a number of air knife uniform holes, and the air nozzle communicates with the air cavity.

[0008] The air cavity is equipped with an air guide plate, which together with the inner wall of the air cavity forms a groove with a gradually narrowing width, and the air nozzle is located at the narrowest bottom surface of the groove.

[0009] The air guide plate is a V-shaped plate, and forms two oppositely arranged grooves in the air cavity. The air nozzle is provided on the narrowest bottom surface of each groove.

[0010] The drying air knife includes an end plate and four side plates. The air cavity is formed by the end plate and the four side plates. An arc protrusion is provided at the intersection of the end plate and the side plates, and the arc protrusion is located inside the air cavity.

[0011] It also includes anti-escape drying air knives, with anti-escape drying air knives provided at both ends of the upper air knife group and both ends of the lower air knife group.

[0012] The air inlet cavity divides the cavity into cavity one and cavity two, and the air inlet cavity is connected to cavity one and cavity two through a corresponding oven air distribution plate.

[0013] The bottom surface of the air inlet cavity is also provided with an oven air distribution plate, and the hot air flowing out through the oven air distribution plate can be blown into the corresponding drying air knife through the air outlet located below the air inlet cavity.

[0014] Both the upper and lower ovens include inclined top plates, which causes the height of cavity one and cavity two to gradually decrease from the position near the air inlet cavity to the position away from the air inlet cavity.

[0015] Both cavity one and cavity two are equipped with several flow guide baffles.

[0016] The beneficial effects of this utility model are as follows: This utility model provides hot air to the upper and lower air knife groups through the upper and lower drying ovens, respectively. The hot air enters the air knife after passing through the air distribution plates in the upper and lower drying ovens, so the flow rate of the hot air is not only stable but also uniform. Moreover, the upper and lower air knife groups of this application can form a high-speed hot air flow, which can evenly blow the hot air to both sides of the film. Furthermore, the staggered arrangement of the drying air knives makes the film form an S-shape during the movement, which not only increases the drying area but also improves the drying speed, thereby improving the drying efficiency. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a structural view of the present invention;

[0019] Figure 2 This is a bottom structural view of the upper oven;

[0020] Figure 3 This is a schematic diagram of the arrangement of the drying air knife of this utility model;

[0021] Figure 4 This is a schematic diagram of the drying air knife;

[0022] Figure 5 This is a schematic diagram of the drying air knife from another direction;

[0023] Figure 6This is a schematic diagram of the cross-section of the drying air knife;

[0024] Figure 7 This is a structural diagram of the anti-escape knife;

[0025] Figure 8 This is a schematic diagram of the cross-section of the anti-airflow knife. Detailed Implementation

[0026] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0027] The shapes, dimensions, scales, angles, and numbers disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise indicated, singular terms may include plural forms.

[0028] When interpreting components, even if not explicitly described, the components are understood to include a range of tolerances.

[0029] When describing positional relationships, such as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts unless "immediately following" or "directly" is used.

[0030] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases may be included unless “exactly” or “directly” is used.

[0031] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0032] As will be fully understood by those skilled in the art, the features of the different embodiments of this disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other and be technically driven in various ways. The embodiments of this disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0033] Reference Figure 1 , Figure 2 This utility model discloses a double-sided drying device for coated films, including an upper drying oven 100, a lower drying oven 200, and a plurality of drying air knives 1 disposed between the upper drying oven 100 and the lower drying oven 200. The upper drying oven 100 and the lower drying oven 200 are generally in the shape of an isosceles trapezoid with a narrower upper part and a wider lower part, and are welded from iron plates. Both the upper drying oven 100 and the lower drying oven 200 are provided with air inlet chambers 210 and the bottom surface of the chambers is provided with a plurality of air outlet holes 220. The air inlet chambers 210 contain... The oven includes several oven air distribution plates 230, each with several air distribution holes 240. An air inlet cavity 210 is formed by the upper oven wall and the three oven air distribution plates 230, creating a square cavity with an opening on one side serving as the air inlet. In this application, the air inlet cavity 210 is located in the middle of the upper oven 100. The air inlet cavity 210 divides the cavity into cavity one and cavity two, which are of equal volume and shape, thus ensuring that the airflow from the air inlet cavity 210 is evenly distributed to the cavities. The upper oven 100 and the lower oven 200 are connected to the first and second cavities via corresponding oven air distribution plates 230. This makes the hot air entering the first and second cavities more uniform and gentle. As a further preferred structure, the bottom surface of the air inlet 210 is also provided with an oven air distribution plate 230. The hot air flowing out through the oven air distribution plate 230 can be blown into the corresponding drying air knife 1 through the air outlet 220 located below the air inlet 210. This ensures that the hot air blown out of all the air outlets 220 is uniform and gentle. As a further structure, both the upper oven 100 and the lower oven 200 include inclined top plates 260, so that the height of the first and second cavities gradually decreases from the position close to the air inlet 210 to the position far away from the air inlet 210. Because the height of the first and second cavities decreases, the intensity of the hot air in the position far away from the air inlet 210 is not weakened, thus ensuring that the air volume of the drying air knife at each position is consistent. Furthermore, both cavity one and cavity two are provided with several flow guide baffles 270, which divide cavity one and cavity two into several flow guide channels, thereby ensuring that the hot air flow is uniform and not chaotic.

[0034] like Figures 3 to 8As shown, the drying air knife 1 is divided into an upper air knife group 2 and a lower air knife group 3 arranged in parallel. The drying air knife 1 in the upper air knife group 2 is located above the film; the drying air knife 1 in the lower air knife group 3 is located below the film. The air inlet 5 of the drying air knife 1 is connected to the external air source through the corresponding air outlet 220. The air nozzles 6 of the drying air knife 1 all face the film, and the air nozzles 6 of the drying air knife 1 in the upper air knife group and the drying air knife 1 in the lower air knife group are staggered. The hot air entering the air inlet cavity 210 flows into the air outlet 220 after passing through the oven air distribution plate 230, and then blows onto the film through the air nozzles 6 of the drying air knife 1.

[0035] As shown in the figure, the drying air knife 1 includes an air cavity 4, which has an air inlet 5 and an air nozzle 6. The air inlet 5 is connected to an external air source, so that hot air from the outside can enter the air cavity 4. The air nozzle 6 faces the film, and then the hot air is blown out from the air nozzle 6 and blown onto the film, thereby drying the coating on the film. The air nozzles 6 of the drying air knife 1 of the upper air knife group 2 and the drying air knife 1 of the lower air knife group 3 are staggered. The film is located between the upper air knife group 2 and the lower air knife group 3. The staggered drying air knives can evenly blow hot air to both sides of the film, so that the film forms an S-shape during the movement, which not only increases the drying area but also improves the drying speed.

[0036] As shown in the figure, the drying air knife 1 includes an end plate and oppositely arranged side plates. The air cavity 4 is formed by the end plate and four side plates. The drying air knife 1 is rectangular in shape, and the air cavity 4 is a rectangular cavity. The air nozzle 6 is a square narrow slit on the end plate with a length equivalent to that of the end plate. The drying air knife 1 has folded edges on both sides for fixing to the drying oven. The air cavity 4 is provided with an air knife uniform plate 7. The air knife uniform plate 7 is provided with several air knife uniform holes 8. The air knife uniform holes 8 are preferably round holes. The round holes are smooth and without sharp edges to avoid turbulence when the air passes through. The hot air passing through the air knife uniform plate 7 can improve the uniformity of the hot air in the air cavity 4 and increase the wind speed.

[0037] As shown in the figure, the air cavity 4 is provided with an air guide plate 9, which is inclined to the inner wall of the air cavity 4. Therefore, the air guide plate 9 and the inner wall of the air cavity 4 form a groove with a gradually narrowing width. The air nozzle 6 is located at the narrowest bottom surface of the groove. Therefore, when hot air enters the air cavity 4 from the air inlet 5, it first passes through the air knife uniform plate 7 for air distribution, and then enters the groove. After being guided and squeezed by the air guide plate 9, the speed of the hot air blown out of the air nozzle 6 is increased, and the turbulence in the air is reduced. Therefore, the hot air is accelerated and mixed by the air knife uniform plate 7 and the air guide plate 9. The hot air coming out of the air nozzle 6 is already a uniform, stable airflow with a high speed, which can improve the drying efficiency and drying effect, and quickly dry the film evenly. As a further preferred structure, the air guide plate 9 is a V-shaped plate, which is located at the center of the air cavity 4, thereby forming two oppositely arranged grooves in the air cavity 4. The narrowest bottom surface of each groove is provided with the air nozzle 6. The above structure can make full use of the space in the air cavity 4, thereby dividing the air cavity 4 into two grooves and providing the two air nozzles 6 with a high-speed and stable airflow that does not interfere with each other.

[0038] As shown in the figure, as a further structure, an arc protrusion 10 is provided at the intersection of the end plate and the longer side plate. The arc protrusion 10 is located inside the air cavity 4. The arc protrusion 10 can prevent air turbulence from forming at the intersection of the end plate and the side plate, thereby affecting the stability and uniformity of the airflow.

[0039] like Figure 5 and 6 As shown, in order to make full use of hot air and prevent the exhaust gas from escaping from the feed end and discharge end of the film, this structure is also designed with an anti-escape drying air knife 11. The anti-escape drying air knife 11 is provided at both ends of the upper air knife group 2 and both ends of the lower air knife group 3, and the anti-escape drying air knife 11 on the same side is directly opposite each other. The airflow through the anti-escape drying air knife 11 can prevent the hot air in the oven from escaping, which is not only environmentally friendly but also makes full use of thermal energy. The structure and principle of the anti-escape drying air knife 11 are the same as those of the drying air knife 1, except that the anti-escape drying air knife 11 is only designed with one air nozzle 6, so its structure will not be described in detail.

[0040] In summary, when the film passes between the upper oven 100 and the lower oven 200, the drying air knife 1 of the upper air knife group 2 dries the top of the film, while the drying air knife 1 of the lower air knife group 3 dries the bottom of the film, thereby drying the film as a whole. The drying speed is fast and the drying effect is also good.

[0041] The above provides a detailed description of a double-sided drying device for coated films provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A double-sided drying device for coated films, characterized in that: The system includes an upper oven, a lower oven, and several drying air knives positioned between the upper and lower ovens. Both the upper and lower ovens have air inlet chambers and several air outlets on their bottom surfaces. Each air inlet chamber includes several oven air distribution plates with several air distribution holes. The drying air knives are divided into an upper air knife group and a lower air knife group arranged in parallel. The drying air knives in the upper air knife group are located above the film; the drying air knives in the lower air knife group are located below the film. The air inlets of the drying air knives are connected to an external air source through corresponding air outlets. The nozzles of the drying air knives all face the film, and the nozzles of the drying air knives in the upper and lower air knife groups are staggered. Hot air entering the air inlet chamber flows through the oven air distribution plates, into the air outlets, and then through the nozzles of the drying air knives towards the film.

2. The double-sided drying apparatus for coated films according to claim 1, characterized in that: The drying air knife has an air cavity, and the air cavity is provided with an air knife uniform plate. The air knife uniform plate is provided with a number of air knife uniform holes, and the air nozzle communicates with the air cavity.

3. The double-sided drying apparatus for coated films according to claim 2, characterized in that: The air cavity is equipped with an air guide plate, which together with the inner wall of the air cavity forms a groove with a gradually narrowing width, and the air nozzle is located at the narrowest bottom surface of the groove.

4. The double-sided drying apparatus for coated films according to claim 3, characterized in that: The air guide plate is a V-shaped plate, and forms two oppositely arranged grooves in the air cavity. The air nozzle is provided on the narrowest bottom surface of each groove.

5. The double-sided drying apparatus for coated films according to claim 2, characterized in that: The drying air knife includes an end plate and four side plates. The air cavity is formed by the end plate and the four side plates. An arc protrusion is provided at the intersection of the end plate and the side plates, and the arc protrusion is located inside the air cavity.

6. The double-sided drying apparatus for coated films according to claim 1, characterized in that: It also includes anti-escape drying air knives, with anti-escape drying air knives provided at both ends of the upper air knife group and both ends of the lower air knife group.

7. The double-sided drying apparatus for coated films according to claim 1, characterized in that: The air inlet cavity divides the cavity into cavity one and cavity two, and the air inlet cavity is connected to cavity one and cavity two through a corresponding oven air distribution plate.

8. The double-sided drying apparatus for coated films according to claim 1, characterized in that: The bottom surface of the air inlet cavity is also provided with an oven air distribution plate, and the hot air flowing out through the oven air distribution plate can be blown into the corresponding drying air knife through the air outlet located below the air inlet cavity.

9. The double-sided drying apparatus for coated films according to claim 7, characterized in that: Both the upper and lower ovens include inclined top plates, which causes the height of cavity one and cavity two to gradually decrease from the position near the air inlet cavity to the position away from the air inlet cavity.

10. The double-sided drying apparatus for coated films according to claim 7, characterized in that: Both cavity one and cavity two are equipped with several flow guide baffles.

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