Suspension drying oven for biaxially oriented film production

Abstract

The utility model relates to the technical field of suspension drying ovens, and discloses a suspension drying oven for biaxially oriented film production, which comprises a heating box, a plurality of air injection assemblies are arranged in the heating box, adjusting assemblies are arranged on the side walls of the air injection assemblies, linkage arms are fixedly connected to the other side walls of the air injection assemblies, and each adjusting assembly comprises a driving motor. The output end of the driving motor is fixedly connected with a connecting arm, the side wall of the connecting arm is rotationally connected with a sliding block, a swing arm is arranged on the side wall of the driving motor, and a sliding groove is formed in the swing arm. According to the utility model, the driving motor drives the connecting arm to enable the sliding block to slide in the sliding chute in the swing arm, so that the swing arm is promoted to swing, and the connecting rod and the tuyere are driven to change angles, thereby realizing the effect of quickly adjusting the angle of the tuyere and solving the problems that the angle of the tuyere of the drying oven is fixed and the airflow cannot be adjusted according to the actual conditions of different positions of a film; and the uniformity and accuracy of the action of airflow on the film in film production are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of suspension oven, especially to the suspension oven of biaxially oriented film production. BACKGROUND

[0002] In the field of biaxially oriented film production, especially for BOPA film, the suspension oven plays a crucial role, BOPA film is widely used in food packaging, electronics and many other industries due to its excellent performance, the suspension oven can complete drying and stretching process in the suspended state, avoid damage caused by the contact between the film and the inner wall of the oven, greatly improve the film quality, with the industry's increasing demand for BOPA film quality and production efficiency, the demand for improvement of the suspension oven technology is increasingly urgent, and the development of more advanced and efficient suspension oven has become the key direction of the industry development.

[0003] The existing suspension oven for biaxially oriented film production, in the mechanical structure, the tuyere is fixedly installed, the airflow is blown out from the fixed angle, from the technical principle, it mainly maintains the film suspension and drying operation through the preset constant airflow parameter, the dynamic adjustment ability of the airflow in the oven is limited, in the daily production, the suspension oven with the traditional structure and principle can meet the basic production demand, and realizes the stretching and drying process of the film under the conventional production process.

[0004] However, the existing suspension oven has significant drawbacks, because the oven tuyere angle is fixed, it cannot flexibly adjust the airflow direction and intensity according to the actual situation of the film at different positions in the oven, such as uneven film thickness, different stretching progress, which leads to the difficulty of airflow to fully penetrate and realize effective drying and stretching in the thicker area of the film, and the film damage caused by excessive airflow in the thinner area greatly affects the consistency and stability of the film quality, therefore, the suspension oven for biaxially oriented film production is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] In order to make up for the above shortcomings, the utility model provides a suspension oven for biaxially oriented film production, which aims at improving the angle of the oven tuyere in the prior art, which cannot adjust the airflow according to the actual situation of the film at different positions.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model relates to a suspension oven of biaxial stretching film production, including heating box, a plurality of air jet components are arranged inside the heating box, the air jet component is arrayed and is distributed on the inside of heating box upside and downside, the side wall of air jet component all is provided with adjusting assembly, the adjusting assembly is used for adjusting air jet component angle, the other side wall of air jet component all is fixedly connected with linkage arm, the side wall top of linkage arm all is rotatably connected in the side wall of heating box,

[0008] The adjusting assembly includes a drive motor, the drive motor is fixedly connected to the inside of the heating box, the drive motor output is fixedly connected with a connecting arm, the connecting arm side wall is rotatably connected with a sliding block, the drive motor side wall is provided with a swing arm, the swing arm side wall top is rotatably connected to the side wall of the heating box, the swing arm is internally provided with a sliding groove, and the sliding block is externally connected to the sliding groove.

[0009] As a further description of the above technical solutions:

[0010] The air jet component includes a plurality of tuyeres, the tuyere top is provided with a connecting rod, one side of the connecting rod is fixedly connected to the swing arm side wall bottom, and the other side wall of the connecting rod is fixedly connected to the linkage arm side wall bottom.

[0011] As a further description of the above technical solutions:

[0012] The connecting rod top center position is fixedly connected with an integrator, the integrator top is fixedly connected with a plurality of exhaust pipes, and one end of the exhaust pipe is fixedly connected to the heating box inner wall.

[0013] As a further description of the above technical solutions:

[0014] The heating box left and right sides are provided with a feeding port, and the heating box outer wall two sides are fixedly connected with a feeding roller, and the feeding roller is located at the feeding port side.

[0015] As a further description of the above technical solutions:

[0016] The heating box side is fixedly connected with an air inlet box, a plurality of air inlet fans are fixedly connected in the air inlet box, the air inlet fan one side is provided with a isolation net, and the isolation net outer wall is fixedly connected in the air inlet box.

[0017] As a further description of the above technical solutions:

[0018] The other side of the air inlet fan is provided with a filter plate, and the filter plate is slidably connected in the air inlet box.

[0019] As a further description of the above technical solutions:

[0020] The linkage column is externally connected with a limiting plate, and internally connected with a limiting spring.

[0021] As a further description of the above technical solution:

[0022] The linkage column is externally connected with a limiting plate, and internally connected with a limiting spring.

[0023] The utility model has the advantages of:

[0024] 1. In the utility model, the driving motor drives the connecting arm to rotate, the connecting arm pushes the sliding block to slide in the sliding groove in the swing arm, the sliding block slides to make the swing arm swing, and then drives the connecting rod and the air nozzle to change the angle, so as to realize the effect of quickly adjusting the angle of the air nozzle, solve the problem that the angle of the air nozzle of the oven is fixed and cannot be adjusted according to the actual situation of different positions of the film, and improve the uniformity and precision of the effect of airflow on the film in film production.

[0025] 2. In the utility model, the staff pulls the connecting plate outward, the displacement of the connecting plate drives the displacement of the bottom linkage column, the linkage column drives the synchronous displacement of the limiting plate, the limiting spring is compressed under stress, and the bottom linkage column is separated from the inside of the filter plate. At this time, the staff can take out the filter plate through the filter plate side wall handle to clean and maintain, so as to realize the effect of keeping the inside of the oven clean and preventing impurities from affecting the quality of the film, solve the problem that impurities in the oven easily accumulate and affect the quality of the film, improve the quality of the film, and ensure stable production. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a perspective view of the suspension oven for bidirectional stretching film production provided by the utility model;

[0027] Figure 2 It is a heating box structure schematic view of the suspension oven for bidirectional stretching film production provided by the utility model;

[0028] Figure 3 It is Figure 2 An enlarged view of position A in the middle;

[0029] Figure 4 It is a filter plate structure schematic view of the suspension oven for bidirectional stretching film production provided by the utility model;

[0030] Figure 5 It is Figure 4 An enlarged view of position B in the middle.

[0031] Legend:

[0032] 1, heating box; 2, feed inlet; 3, feed roller; 4, drive motor; 5, connecting arm; 6, sliding block; 7, swing arm; 8, chute; 9, connecting rod; 10, tuyere; 11, collector; 12, exhaust pipe; 13, linkage arm; 14, air inlet box; 15, isolation net; 16, air inlet fan; 17, filter plate; 18, linkage column; 19, limiting plate; 20, limiting spring; 21, connecting plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] Referring to Figure 1 - Figure 3 An embodiment provided by the present application: a suspension oven for biaxially oriented film production, comprising a heating box 1, the heating box 1 is made of metal material, has good heat resistance and structural strength, and functions to provide a relatively closed and stable space for the drying process of the biaxially oriented film. A plurality of air jet assemblies are arranged inside the heating box 1, the air jet assemblies function to jet hot air to the film inside the heating box 1 to realize drying treatment of the film, the air jet assemblies are distributed in an array on the upper and lower sides inside the heating box 1, the side walls of the air jet assemblies are each provided with an adjusting assembly, the adjusting assembly is used to adjust the angle of the air jet assembly, the other side walls of the air jet assemblies are each fixedly connected with a linkage arm 13, the linkage arm 13 is made of aluminum alloy, the linkage arms 13 are each rotatably connected to the side wall of the heating box 1 at the top of the side wall, and function to assist the air jet assemblies to adjust the angle under the driving of the adjusting assemblies;

[0035] The adjusting assembly comprises a driving motor 4 fixedly connected to the inside of the heating box 1, which provides power for the whole adjusting assembly; the output end of the driving motor 4 is fixedly connected with a connecting arm 5 through a shaft coupling, the connecting arm 5 is made of metal, which transmits the rotation of the driving motor 4 to the sliding block 6; the side wall of the connecting arm 5 is rotatably connected with the sliding block 6 through a bearing, the sliding block 6 is made of metal, which slides in the sliding groove 8 of the swing arm 7 under the driving of the connecting arm 5; the side wall of the driving motor 4 is provided with a swing arm 7, which swings under the driving of the sliding block 6, thereby changing the angle of the air jet assembly; the top of the side wall of the swing arm 7 is rotatably connected to the side wall of the heating box 1 through a shaft pin; the swing arm 7 is internally provided with a sliding groove 8, which is a groove formed in the swing arm 7 by machining; the outer wall of the sliding block 6 is slidably connected to the inner wall of the sliding groove 8; the air jet assembly comprises a plurality of tuyeres 10 made of metal and having good high-temperature resistance, which uniformly sprays hot air to the surface of the film; the top of each tuyere 10 is provided with a connecting rod 9, which connects the swing arm 7, the linkage arm 13 and the tuyere 10, and transmits the swing action of the swing arm 7 to change the angle of the tuyere 10; one side of the connecting rod 9 is fixedly connected to the bottom of the side wall of the swing arm 7, and the other side wall of the connecting rod 9 is fixedly connected to the bottom of the side wall of the linkage arm 13; the top of the connecting rod 9 is fixedly connected with an integrator 11, which concentrates and distributes the hot air input from the exhaust pipe 12 to make it uniformly flow to each tuyere 10; the top of the integrator 11 is fixedly connected with a plurality of exhaust pipes 12, which convey the heated air to the integrator 11; one end of each exhaust pipe 12 is fixedly connected to the inner wall of the heating box 1.

[0036] Specifically, in the use of the suspension oven produced by the biaxially oriented film, first of all, the staff will put the BOPA film on the feeding roller 3, the feeding roller 3 drives the BOPA film to move to the feeding port 2 by friction. The BOPA film moves linearly along the surface of the feeding roller 3 to the direction of the feeding port 2 with the rotation of the feeding roller 3, and finally enters the inside of the heating box 1 through the feeding port 2. At this time, the air inlet fan 16 in the air inlet box 14 starts to work, the suction force generated by the air inlet fan 16 sucks the external air from the air inlet of the air inlet box 14, and the sucked air is heated under the action of the heating device in the air inlet box 14 to form hot air. The hot air flows into the integrator 11 along the exhaust pipe 12, and after entering the integrator 11, it is distributed in the chamber inside the integrator 11. The integrator 11 uniformly disperses the hot air into each channel connected to the tuyere 10, and then the hot air flows along these channels to each tuyere 10. The hot air is sprayed out of the tuyere 10 at a certain speed and angle to form a hot gas beam, which dries the film in the heating box 1 and removes the moisture or solvent in the BOPA film, so that the film reaches the required drying degree. When it is necessary to adjust the angle of the tuyere 10 according to the position of the film, the output end of the driving motor 4 starts to rotate. Since the connecting arm 5 is fixedly connected to the output end of the driving motor 4, the connecting arm 5 rotates with the output end of the driving motor 4. The rotation of the connecting arm 5 causes the sliding block 6 to slide in the inner wall of the sliding groove 8 in the swing arm 7. When the connecting arm 5 rotates, the sliding block 6 slides linearly in the sliding groove 8 from one end to the other end. The sliding of the sliding block 6 causes the swing arm 7 to swing. The swing arm 7 is rotatably connected to the side wall of the heating box 1 at the top of the side wall. When the sliding block 6 slides in the sliding groove 8, the sliding block 6 exerts a force on the inner wall of the sliding groove 8. This force makes the swing arm 7 swing in a plane with the rotation point at the top of the swing arm 7 as the center. The swing direction and angle of the swing arm 7 depend on the sliding position and distance of the sliding block 6 in the sliding groove 8. The swing of the swing arm 7 is transmitted to the tuyere 10 through the connecting rod 9. One end of the connecting rod 9 is fixedly connected to the bottom of the side wall of the swing arm 7, and the other end is fixedly connected to the bottom of the side wall of the linkage arm 13. When the swing arm 7 swings, the connecting rod 9 moves with it. The movement of the connecting rod 9 drives the tuyere 10 to change the angle. The tuyere 10 rotates in a plane with the rotation point at the top of the linkage arm 13 as the center, thereby achieving the effect of quickly adjusting the angle of the tuyere 10. The heating box 1 is provided with feeding ports 2 on both sides. The feeding port 2 is a rectangular opening in the side wall of the heating box 1, which provides a passage for the BOPA film and other materials that need to be dried to enter the inside of the heating box 1. The heating box 1 is fixedly connected with feeding rollers 3 on both sides. The feeding rollers 3 are driven to rotate by a motor or other power source, and the BOPA film is smoothly fed into the feeding port 2 and then into the inside of the heating box 1 through the friction between the surface of the film and the feeding rollers 3. The feeding roller 3 is located at the side of the feeding port 2.

[0037] Referring to Figure 4 and Figure 5The heating box 1 side fixedly connected with the air inlet box 14, the air inlet box 14 is made of galvanized steel sheet, the air inlet box 14 is used to accommodate the air inlet fan 16, the isolation net 15, the filter plate 17 and other components, to provide clean, preheated air for the heating box 1, a plurality of air inlet fans 16 are fixedly connected inside the air inlet box 14, the air inlet fan 16 is composed of motor, fan blade and other components, the air inlet fan 16 is used to suck the external air into the air inlet box 14, and generate airflow through the high-speed rotation of the fan blade, to push the air to flow in the air inlet box 14, and finally sent into the heating box 1, the air inlet fan 16 is provided with the isolation net 15 on one side, the isolation net 15 is made of metal wire mesh, which is used to prevent the external larger sundries, such as leaves, insects and the like, from entering the air inlet box 14, to avoid the damage of these sundries to the air inlet fan 16 or the influence on the air quality in the oven, the isolation net 15 is fixedly connected to the inner wall of the air inlet box 14, the air inlet fan 16 is provided with the filter plate 17 on the other side, the filter plate 17 is made of fiber material and filter medium, which is used to further filter the air entering the air inlet box 14, to remove the small particles, dust and other impurities in the air, to ensure the clean air entering the heating box 1, to prevent the impurities from affecting the film quality, the filter plate 17 is slidingly connected inside the air inlet box 14, a plurality of linkage columns 18 are arranged on the upper and lower sides of the filter plate 17, the linkage column 18 is slidingly connected to the outer wall of the air inlet box 14, the linkage column 18 is slidingly connected to the inner wall of the filter plate 17, the linkage column 18 is fixedly connected with the connecting plate 21 at the top, the linkage column 18 is fixedly connected with the limiting plate 19 at the outer wall, the linkage column 18 is sleeved with the limiting spring 20 at the outer wall, the limiting spring 20 is used to store elastic potential energy when the linkage column 18 is pulled, and release the elastic potential energy when the pulling force disappears, to push the linkage column 18 to reset, to be inserted into the filter plate 17, one end of the limiting spring 20 is fixedly connected to the outer wall of the limiting plate 19, the other end of the limiting spring 20 is fixedly connected to the inner wall of the air inlet box 14;

[0038] Specifically, when the equipment is maintained daily, the worker applies a pulling force to the connecting plate 21, the connecting plate 21 is displaced outward along a direction perpendicular to the wall of the air inlet box 14 under the pulling force applied by the worker, since the top of the linkage column 18 is fixedly connected with the connecting plate 21, when the connecting plate 21 moves, the linkage column 18 moves synchronously, the limiting plate 19 is fixedly connected with the linkage column 18, when the linkage column 18 moves, the limiting plate 19 also moves linearly along the sliding channel of the linkage column 18 from a position close to the inside of the air inlet box 14 to a direction away from the inside of the air inlet box 14, the displacement of the limiting plate 19 further causes the limiting spring 20 to be compressed under force, when the limiting plate 19 moves outward, the limiting spring 20 is gradually compressed, and the elastic potential energy is continuously increased, at the same time, the bottom of the linkage column 18 is originally connected with the inside of the filter plate 17 through the sliding fit structure, when the linkage column 18 moves outward, the bottom thereof gradually slides out of the connecting position in the inside of the filter plate 17, at this time, the worker can apply a pulling force to the filter plate 17 through the handle on the side wall of the filter plate 17 in a direction away from the inside of the air inlet box 14, the filter plate 17 is displaced linearly along the sliding channel in the inside of the air inlet box 14 from the inside of the air inlet box 14 to the outside until it is completely taken out of the air inlet box 14, the worker places the taken-out filter plate 17 on the cleaning table, and uses cleaning agent, water or the like to clean and maintain the filter plate 17, so as to remove the dust, impurities and the like accumulated on the filter plate 17, after the cleaning is completed, the worker re-installs the filter plate 17 into the air inlet box 14, the worker aligns the filter plate 17 with the sliding channel in the air inlet box 14, and then applies a pushing force to the filter plate 17, so that the filter plate 17 moves along the sliding channel into the inside of the air inlet box 14, when the filter plate 17 moves to a proper position, the limiting spring 20 releases the elastic potential energy, and pushes the limiting plate 19 and the linkage column 18 to reset, the bottom of the linkage column 18 is re-connected with the inside of the filter plate 17, so that the effects of keeping the inside of the oven clean and preventing impurities from affecting the quality of the film are achieved.

[0039] Working principle: in the use of the production of the suspended oven of the two-way stretch film, first the staff will BOPA film through the feed roller 3 and the feed port 2, put into the inside of the heating box 1, at this time, the air inlet fan 16 in the air inlet box 14 will be heated after the external air is sucked into the integrator 11, which is dispersed to each air nozzle 10 by the integrator 11, and finally the hot air is discharged through the air nozzle 10, the film in the heating box 1 is dried, the moisture or solvent in the BOPA film is removed, and the film reaches the required drying degree, when the angle of the air nozzle 10 is adjusted according to the position of the film, first the driving motor 4 drives the connecting arm 5 to rotate, the rotation of the connecting arm 5 promotes the sliding block 6 to slide in the sliding groove 8 in the inner wall of the swing arm 7, the sliding of the sliding block 6 promotes the swing arm 7 to swing, and further drives the connecting rod 9 and the air nozzle 10 to change the angle, so as to realize the effect of quickly adjusting the angle of the air nozzle 10, when the equipment is maintained daily, first the staff pulls out the connecting plate 21, the displacement of the connecting plate 21 drives the linkage column 18 at the bottom to displace, the displacement of the linkage column 18 also drives the limiting plate 19 to displace synchronously, and further promotes the limiting spring 20 to compress under stress, and also promotes the bottom of the outer wall of the linkage column 18 to be separated from the inside of the filter plate 17, so that the staff can take out the filter plate 17 through the handle of the sidewall of the filter plate 17, and clean and maintain the filter plate 17, so as to achieve the effect of keeping the inside of the oven clean and preventing impurities from affecting the quality of the film.

[0040] Finally, it should be pointed out that: the above only for preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. Suspended oven for the production of biaxially oriented film comprising a heating chamber (1), characterized in that: The heating box (1) is internally provided with a plurality of air injection assemblies, which are arrayed on the upper and lower sides of the heating box (1) inside, the side walls of the air injection assemblies are provided with adjusting assemblies for adjusting the angles of the air injection assemblies, the other side walls of the air injection assemblies are fixedly connected with linkage arms (13), and the side wall top portions of the linkage arms (13) are rotatably connected with the side walls of the heating box (1); The adjusting assembly comprises a driving motor (4), the outer wall of the driving motor (4) is fixedly connected with the inside of the heating box (1), the output end of the driving motor (4) is fixedly connected with a connecting arm (5), the side wall of the connecting arm (5) is rotatably connected with a sliding block (6), the side wall of the driving motor (4) is provided with a swing arm (7), the swing arm (7) is rotatably connected with the side wall of the heating box (1) at the top of the side wall, and a sliding groove (8) is formed in the inside of the swing arm (7).

2. The suspended oven for the production of biaxially oriented film according to claim 1, characterized in that: The air injection assembly comprises a plurality of tuyeres (10), the top of each tuyere (10) is provided with a connecting rod (9), one side of the connecting rod (9) is fixedly connected with the bottom of the side wall of the swing arm (7), and the other side wall of the connecting rod (9) is fixedly connected with the bottom of the side wall of the linkage arm (13).

3. The suspended oven for the production of biaxially oriented film according to claim 2, characterized in that: The top center of the connecting rod (9) is fixedly connected with an integrator (11), the top of the integrator (11) is fixedly connected with a plurality of exhaust pipes (12), and one end of each exhaust pipe (12) is fixedly connected with the inner wall of the heating box (1).

4. The suspended oven for the production of biaxially oriented film according to claim 1, characterized in that: The left and right sides of the heating box (1) are provided with feeding ports (2), the outer walls of the left and right sides of the heating box (1) are fixedly connected with feeding rollers (3), and the feeding rollers (3) are located at the side edges of the feeding ports (2).

5. The suspended oven for the production of biaxially oriented film according to claim 1, characterized in that: The side edge of the heating box (1) is fixedly connected with an air inlet box (14), a plurality of air inlet fans (16) are fixedly connected in the inside of the air inlet box (14), the one side of each air inlet fan (16) is provided with a separation net (15), and the outer wall of the separation net (15) is fixedly connected in the inside of the air inlet box (14).

6. The suspended oven for the production of biaxially oriented film according to claim 5, characterized in that: The other side of each air inlet fan (16) is provided with a filter plate (17), and the filter plate (17) is slidably connected in the inside of the air inlet box (14).

7. The suspended oven for the production of biaxially oriented film according to claim 6, characterized in that: The upper and lower sides of the filter plate (17) are provided with a plurality of linkage columns (18), the outer walls of the linkage columns (18) are slidably connected in the inside of the air inlet box (14), the bottoms of the linkage columns (18) are slidably connected in the inside of the filter plate (17), and the tops of the linkage columns (18) are fixedly connected with connecting plates (21).

8. The suspended oven for the production of biaxially oriented film according to claim 7, characterized in that: The outer walls of the linkage columns (18) are fixedly connected with limiting plates (19), the outer walls of the linkage columns (18) are sleeved with limiting springs (20), one end of each limiting spring (20) is fixedly connected with the outer wall of the limiting plate (19), and the other end of each limiting spring (20) is fixedly connected in the inside of the air inlet box (14).

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