Biaxially oriented film suspension drying oven

Abstract

The utility model discloses a two-way stretch film suspension drying oven, and relates to the field of suspension drying ovens. The drying oven comprises a drying oven body, heat recovery assemblies are arranged on the upper side and the lower side of the drying oven body, each heat recovery assembly comprises an upper guide frame and a lower guide frame, and one side of the interior of each upper guide frame and one side of the interior of each lower guide frame are communicated with the drying oven body through air inlets. According to the film drying device, high-pressure and high-temperature airflow is obliquely jetted to a film through the heat recovery assembly and the multiple air nozzles located on the rear section of the drying oven, so that the upper face and the lower face of the film are dried at the same time, and after drying is completed, the film can be dried at the same time; air flow enters the upper guide frame and the lower guide frame through the air inlet, and gas containing residual heat is blown to the surface of a front-section film through the air outlet, so that the front section of the film is preheated, a preheating device in a traditional device is omitted, energy consumption is effectively reduced, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of suspension ovens, specifically a suspension oven for biaxially stretched films. Background Art

[0002] Suspension ovens, especially air-floating ovens, play a crucial role in the production of biaxially stretched films. By using high-speed airflows to suspend the films, uniform and rapid drying is achieved, which not only improves production efficiency but also ensures the stability of film quality. This drying method is energy-saving and environmentally friendly, effectively avoiding quality problems such as deformation or cracking that may occur in traditional drying methods. In the production process of biaxially stretched films, air-floating ovens cooperate with other equipment to provide precise temperature control and efficient drying for the films, and are important tools for improving product quality and production efficiency.

[0003] During the use of existing air-floating ovens, the surface of the film is dried by high-speed airflows containing heat inside. However, during actual use, the starting section of the film needs to be preheated to avoid cracks and other situations under subsequent high-temperature drying. Since an additional preheating device needs to be set up, additional energy consumption is required, reducing the energy utilization effect. Summary of the Utility Model

[0004] Based on this, the purpose of the present utility model is to provide a suspension oven for biaxially stretched films, so as to solve the technical problem that the existing suspension oven requires additional electrical components for the preheating mechanism, reducing the energy utilization effect.

[0005] To achieve the above purpose, the present utility model provides the following technical solution: A suspension oven for biaxially stretched films, including an oven main body. Heat recovery components are arranged on both the upper and lower sides of the oven main body. The heat recovery components include an upper guide frame and a lower guide frame. One side inside the upper guide frame and the lower guide frame is connected to the oven main body through an air inlet, and the other side inside the upper guide frame and the lower guide frame is connected to the oven main body through an air outlet. The interior of the oven main body is divided into two regions and separated by a partition. A plurality of air outlet grooves and air inlet grooves are formed on the back surface of the oven main body. A return frame is arranged on the back of the oven main body, and a plurality of through grooves are formed on one side of the surface of the return frame.

[0006] By adopting the above technical solution, the film is fed into the interior of the oven main body through a loading roller and moves from right to left. At the same time, a plurality of jet nozzles located at the rear section of the oven obliquely spray high-pressure and high-temperature airflows on the film to simultaneously dry the upper and lower surfaces of the film. After drying, the airflow enters the upper guide frame and the lower guide frame through the air inlet in the heat recovery component. Subsequently, the gas containing residual heat is blown to the surface of the front-section film through the air outlet, thereby realizing the preheating treatment of the front section of the film.

[0007] Furthermore, a plurality of air inlets are provided and are linearly arranged at equal intervals along the length line of the oven body.

[0008] By adopting the above technical solution, it is ensured that the heat recovery component can uniformly absorb the airflow after drying from different positions of the oven body.

[0009] Furthermore, a plurality of air outlets are provided, and the air outlet directions of the air outlets are inclined with respect to the film.

[0010] By adopting the above technical solution, it is ensured that the preheated airflow can uniformly and widely cover the surface of the film, and the setting of a plurality of air outlets improves the efficiency and uniformity of the preheating treatment.

[0011] Furthermore, two groups of air nozzles are arranged inside the oven body, and a plurality of air nozzles are provided in one group, and the two groups of air nozzles are in a staggered structure.

[0012] By adopting the above technical solution, the two groups of air nozzles can more comprehensively cover the upper and lower surfaces of the film, ensuring the uniformity of the drying effect.

[0013] Furthermore, the partition plate is used to distinguish the heat treatment area division of the film inside the oven body to avoid mutual circulation.

[0014] By adopting the above technical solution, the partition plate divides the inside of the oven body into different heat treatment areas, which ensures that different heat treatment processes such as drying and preheating can be carried out in independent spaces.

[0015] Furthermore, the intake slots and the through slots are opposite in position, and the inside of the oven body is connected to the outside through the intake slots and the through slots.

[0016] By adopting the above technical solution, the airflow inside the oven body can be smoothly exchanged with the outside.

[0017] Furthermore, a loading roller is provided on one side of the oven body, and a plurality of observation windows are provided on the front side of the oven body.

[0018] By adopting the above technical solution, the film can smoothly enter the oven for drying treatment, simplifying the loading process and improving the production efficiency.

[0019] In summary, the present utility model mainly has the following beneficial effects:

[0020] 1. In the present utility model, through the heat recovery component, the film is fed into the interior of the oven main body by the loading roller and moves from right to left. Meanwhile, multiple jet nozzles located at the rear section of the oven jet high-pressure and high-temperature air obliquely to the film to simultaneously dry the upper and lower surfaces of the film. After drying, the air enters the upper guide frame and the lower guide frame through the air inlet, and blows the gas containing residual heat to the surface of the front-section film through the air outlet, thereby realizing the preheating treatment of the front section of the film, eliminating the preheating treatment device in the traditional device, effectively reducing energy consumption, improving energy utilization efficiency and the environmental friendliness of the entire drying process;

[0021] 2. In the present utility model, by setting the reflux frame, the gas after the preheating treatment is discharged from the air outlet groove of the oven main body and enters the reflux frame. Meanwhile, these discharged gases are re-introduced into the interior of the oven main body through the air inlet groove. Inside the oven, these gases are reheated to reach the temperature required for drying, and the heated gases are used again in the film drying process, forming a cycle, realizing the recycling of the gas containing heat, not only improving the utilization efficiency of heat, but also effectively enhancing the energy utilization rate, thus achieving the dual effects of energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front view structural schematic diagram of the present utility model;

[0023] Figure 2 is the back three-dimensional structural schematic diagram of the present utility model;

[0024] Figure 3 is the position structural schematic diagram of the air outlet groove and the air inlet groove of the present utility model;

[0025] Figure 4 is the sectional structural schematic diagram of the reflux frame of the present utility model;

[0026] Figure 5 is the internal structural schematic diagram of the oven main body of the present utility model.

[0027] In the figure: 1. Oven main body; 2. Heat recovery component; 201. Upper guide frame; 202. Lower guide frame; 203. Air inlet; 204. Air outlet; 205. Partition board; 206. Air outlet groove; 207. Air inlet groove; 208. Reflux frame; 209. Through groove; 3. Film; 4. Observation window; 5. Jet nozzle; 6. Loading roller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection or an electrical connection: it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] The following will describe the embodiments of the present utility model according to its overall structure.

[0032] The biaxially oriented film suspension oven, as Figures 1-5 shown, Embodiment 1:

[0033] It includes an oven main body 1. Heat recovery components 2 are provided on both the upper and lower sides of the oven main body 1. The heat recovery component 2 includes an upper guide frame 201 and a lower guide frame 202. One side inside the upper guide frame 201 and the lower guide frame 202 is connected to the oven main body 1 through an air inlet 203, and the other side inside the upper guide frame 201 and the lower guide frame 202 is connected to the oven main body 1 through an air outlet 204. The interior of the oven main body 1 is divided into two areas and separated by a partition 205. A plurality of air outlet grooves 206 and air inlet grooves 207 are formed on the back surface of the oven main body 1. A return frame 208 is provided on the back of the oven main body 1. A plurality of through grooves 209 are formed on one side of the surface of the return frame 208. The film 3 is fed into the interior of the oven main body 1 by a loading roller 6 and moves from right to left. At the same time, a plurality of jet nozzles 5 located in the rear section of the oven jet high-pressure and high-temperature air obliquely to the film 3 to simultaneously dry both sides of the film 3. After drying, the air flow enters the upper guide frame 201 and the lower guide frame 202 through the air inlet 203 in the heat recovery component 2. Subsequently, the gas containing residual heat is blown to the surface of the front-section film 3 through the air outlet 204, thereby realizing the preheating treatment of the front section of the film 3. Through the effective utilization of the heat recovery component 2, the preheating treatment device in the traditional device is eliminated, which not only reduces energy consumption but also improves energy utilization efficiency, making the entire drying process more environmentally friendly.

[0034] Refer to Figure 5 , a plurality of air inlets 203 are provided and arranged in an equidistant linear arrangement along the length line of the oven main body 1, ensuring that the heat recovery component 2 can uniformly absorb the air flow after drying from different positions of the oven main body 1. At the same time, these air inlets 203 are arranged in an equidistant linear arrangement along the length line of the oven main body 1. Such a layout ensures that the air flow rate entering the heat recovery component 2 from each position is relatively stable, which is conducive to maintaining the uniformity and consistency of the preheating treatment.

[0035] Refer to Figure 5 , a plurality of air outlets 204 are provided, and the air outlet direction of the air outlet 204 is inclined to the film 3, ensuring that the preheating air flow can uniformly and widely cover the surface of the film 3. The setting of a plurality of air outlets 204 improves the efficiency and uniformity of the preheating treatment. At the same time, the air outlet direction of the air outlet 204 is inclined to the film 3, so that the air flow blows to the film 3 at a certain angle, which is conducive to the better distribution and coverage of the air flow on the surface of the film 3, further enhancing the preheating effect.

[0036] Refer to Figure 5, there are two groups of air nozzles 5 inside the oven main body 1, and each group of air nozzles 5 has multiple nozzles. The two groups of air nozzles 5 are in a staggered structure. The two groups of air nozzles 5 can more comprehensively cover the upper and lower surfaces of the film 3, ensuring the uniformity of the drying effect. At the same time, each group of air nozzles 5 has multiple nozzles, which further enhances the density and uniformity of the drying air flow, improving the drying efficiency. And the two groups of air nozzles 5 are in a staggered structure. This layout makes the air flow form a staggered spraying pattern on the surface of the film 3, avoiding the direct impact of the air flow, reducing the energy loss, and at the same time ensuring that every part of the film 3 can be fully dried.

[0037] Refer to Figure 5 , the partition plate 205 is used to distinguish the heat treatment area division of the film 3 in the oven main body 1, avoiding mutual circulation. The partition plate 205 divides the inside of the oven main body 1 into different heat treatment areas, which ensures that different heat treatment processes such as drying and preheating can be carried out in independent spaces. At the same time, by avoiding the mutual circulation of the air flow between these areas, the partition plate 205 effectively prevents the chaos of heat and air flow, ensuring the stability of the temperature and air flow conditions in each area. This not only improves the controllability and efficiency of the heat treatment process, but also is conducive to improving the processing quality of the film 3. Embodiment 2:

[0038] Refer to Figure 2 、 Figure 3 、 Figure 4 , the intake slot 207 and the through slot 209 are opposite in position. The inside of the oven main body 1 is connected to the outside through the intake slot 207 and the through slot 209, enabling the air flow inside the oven main body 1 to smoothly exchange with the outside. At the same time, the oven main body 1 is connected to the outside through the intake slot 207 and the through slot 209. This not only ensures the timely update of the gas inside the oven, but also is conducive to maintaining a stable temperature and air flow environment inside the oven. Generally speaking, it improves the ventilation effect and drying efficiency of the oven, is conducive to maintaining the stability and consistency of the drying quality, and at the same time provides good heat dissipation conditions for the working components inside the oven, extending the service life of the equipment.

[0039] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4, a loading roller 6 is provided on one side of the oven body 1, and a plurality of observation windows 4 are provided on the front side of the oven body 1, enabling the film 3 to smoothly enter the oven for drying treatment, simplifying the loading process and improving production efficiency. At the same time, the plurality of observation windows 4 provided on the front side of the oven body 1 provide a convenient monitoring means for the operator, allowing them to observe the working state inside the oven and the drying condition of the film 3 at any time. This not only helps to promptly discover and solve problems, but also ensures the safety and quality control of the drying process. Generally speaking, it improves the convenience of the production process and the visibility of the production process, thereby enhancing the overall production efficiency and product quality.

[0040] The implementation principle of the present utility model is as follows: First, the film 3 is transported into the interior of the oven body 1 through the loading roller 6. As Figure 5 shown, it moves from right to left. At the same time, a plurality of air nozzles 5 located in the rear section jet high-pressure and high-temperature air obliquely onto the film 3 to simultaneously dry both sides of the film 3. Subsequently, the dried air flow circulates into the interior of the upper guide frame 201 and the lower guide frame 202 through the air inlet 203, and finally blows the gas containing residual heat onto the surface of the film 3 in the front section through the air outlet 204 to preheat the front section of the film 3, eliminating the preheating device in the traditional device and reducing energy consumption. Then, the air flow circulates into the interior of the return frame 208 through the air outlet groove 206 on the back of the oven body 1. After that, the discharged gas circulates back into the interior of the oven body 1 through the air inlet groove 207 and is reheated to perform the next round of drying cycle, realizing the recycling of the heat-containing gas and achieving an efficient utilization effect of heat, thus enhancing the energy utilization rate.

[0041] Parts not involved in the present utility model are the same as or can be implemented using the prior art, and will not be elaborated here.

[0042] Although the embodiments of the present utility model have been shown and described, the specific embodiments are only explanations of the present utility model and not limitations thereof. The specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions, and variations that do not contribute creatively to the embodiments according to needs, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. Biaxially stretched film suspension oven, characterized by: The invention comprises an oven body (1), wherein heat recovery components (2) are arranged on both upper and lower sides of the oven body (1), and the heat recovery component (2) comprises an upper guide frame (201) and a lower guide frame (202), wherein one side of the interior of the upper guide frame (201) and the lower guide frame (202) is connected to the oven body (1) via an air inlet (203), and the other side of the interior of the upper guide frame (201) and the lower guide frame (202) is connected to the oven body (1) via an air outlet (204), wherein the interior of the oven body (1) is divided into two areas, which are separated by a partition (205), and a plurality of air outlet grooves (206) and air inlet grooves (207) are provided on the back surface of the oven body (1), and a reflux frame (208) is provided on the back of the oven body (1), and a plurality of through grooves (209) are provided on one side of the surface of the reflux frame (208).

2. The biaxially stretched film suspension oven according to claim 1, characterized in that: A plurality of air inlets (203) are provided, and are linearly arranged at equal distances along the length line of the oven body (1).

3. The biaxially stretched film suspension oven according to claim 1, characterized in that: A plurality of air outlets (204) are provided, and the air outlet directions of the air outlets (204) are arranged to be inclined with respect to the film (3).

4. The biaxially stretched film suspension oven according to claim 1, characterized in that: Two groups of air nozzles (5) are arranged inside the oven body (1), and one group of air nozzles (5) is provided with a plurality of air nozzles, and the two groups of air nozzles (5) are in a staggered structure.

5. The biaxially stretched film suspension oven according to claim 1, characterized in that: The partition (205) is used to distinguish the heat treatment areas of the film (3) in the oven body (1) to avoid mutual flow.

6. The biaxially stretched film suspension oven according to claim 1, characterized in that: The air inlet groove (207) and the through groove (209) are positioned relative to each other, and the interior of the oven body (1) is connected to the outside through the air inlet groove (207) and the through groove (209).

7. The biaxially stretched film suspension oven according to claim 1, characterized in that: A loading roller (6) is provided on one side of the oven body (1), and a plurality of observation windows (4) are provided on the front side of the oven body (1).

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