Air knife structure for cast film machine and cast film machine

Abstract

The utility model discloses an air knife structure for a cast film machine and the cast film machine, and relates to the technical field of air knife structures, the air knife structure comprises an air inlet cylinder, the air inlet cylinder is provided with an air inlet and an air outlet; two fixing plates are hinged to the air inlet cylinder, the bottom ends of the two fixing plates are connected with a fan-shaped air knife through detachable connecting pieces, a plurality of air outlet holes are formed in the fan-shaped air knife, the fan-shaped air knife is connected with an air flow divider, and a plurality of air holes are formed in the air flow divider; the two ends of the two fixing plates are both connected with wind shielding cloth. The air knife is arranged to be of the fan-shaped structure, the air flow covering area is increased, the cast film cooling and shaping time is shortened, the cast film production efficiency is improved, meanwhile, the fan-shaped air knife is connected to the two fixing plates through the detachable connecting pieces, and the fan-shaped air knife can be replaced according to actual needs.

Description

Technical Field

[0001] This utility model relates to the field of air knife structure technology, specifically to an air knife structure for a casting film machine and a casting film machine. Background Technology

[0002] A casting film machine is a mechanical device used for forming cast film products from rubber and plastic materials. During the film production process, the raw material melts and is extruded through a die, then cooled and shaped on a cooling roller. In this process, an air knife presses the molten film against the surface of the cooling roller, increasing cooling efficiency through forced convection, allowing the film to quickly solidify and achieve a smooth surface.

[0003] Traditional air knives often employ a fixed angle design, typically ≤30°, which cannot meet the large-angle airflow impact requirements needed for producing high-shrinkage materials (such as PVB films) or films of special thicknesses, resulting in a single functional limitation. Furthermore, the limited contact area between existing air knives and the cooling rollers leads to poor cooling uniformity and easily generates "air knife marks" defects.

[0004] Therefore, the current air knife structure has a narrow range of applications and suffers from problems such as limited functionality and poor cooling uniformity. Utility Model Content

[0005] The technical problem this invention aims to solve is that current air knife structures suffer from limited functionality and poor cooling uniformity. Based on this, this invention proposes an air knife structure for a casting film machine and a casting film machine itself. This air knife structure is connected to an angle-adjustable support frame, and the air knife is mounted on the support frame via a detachable connector. The angle of the support frame can be adjusted according to actual needs, thus broadening the applicability of the air knife structure and enhancing its functionality. Furthermore, by installing air knives of corresponding sizes, it can be applied to the production of casting films for various materials, while also achieving excellent cooling uniformity.

[0006] This utility model is achieved through the following technical solution:

[0007] In a first aspect, this application provides an air knife structure for a casting film machine, including an air inlet cylinder with an air inlet and an air outlet; two fixed plates are hinged to the air inlet cylinder, and the bottom ends of the two fixed plates are connected to a fan-shaped air knife via detachable connectors. The fan-shaped air knife has multiple air outlets, and a gas distributor is connected to the fan-shaped air knife with multiple air holes; both ends of the two fixed plates are connected to a windproof cloth.

[0008] The length of the fan-shaped air knife is set according to the length of the quenching roller, and the arc of the fan-shaped air knife can be set to 120°~180°.

[0009] The fan-shaped air knife is fixed above the quenching roller by a bracket, with a vertical distance of 5 to 10 mm.

[0010] Since the windbreak cloth is soft, it will not hinder the rotation of the fixed plate, and the size of the windbreak cloth can be set according to the maximum rotation angle required by actual needs.

[0011] Furthermore, the detachable connector includes bolt holes provided on the fixed plate and the fan-shaped air knife, and the fan-shaped air knife is connected to the fixed plate by installing locking bolts in the bolt holes.

[0012] Furthermore, the gas separator includes two vertical plates connected to the fan-shaped air knife, each of which is connected to an inclined plate, and both the vertical plates and the inclined plates are provided with multiple air holes.

[0013] Furthermore, the gas separator has a hemispherical structure. Multiple pores are provided on the hemispherical gas separator.

[0014] Furthermore, a telescopic structure connects the two fixed plates.

[0015] Furthermore, the telescopic structure includes a movable rod connected to one of the fixed plates, and a fixed rod connected to the other fixed plate. The fixed rod is a hollow structure. The movable rod is sleeved inside the fixed plate. The movable rod has multiple fixing holes spaced apart. The fixed rod has mounting holes. When the fixing holes are aligned with the mounting holes, the movable rod and the fixed rod are locked by inserting positioning pins into the fixing holes and the mounting holes.

[0016] Furthermore, the telescopic structure includes a movable rod one and a movable rod two respectively connected to the two fixed plates. Both the movable rod one and the movable rod two are provided with external threads. The movable rod one and the movable rod two are connected by a rotating sleeve. The rotating sleeve is provided with internal threads. The movable rod one and the movable rod two are threadedly connected to the rotating sleeve.

[0017] Furthermore, end caps are installed at both ends of the air inlet cylinder, the air inlet is located at the top of the air inlet cylinder, and a conical gas dispersion chamber is connected to the air inlet.

[0018] The end caps at both ends of the air intake can be screw-connected, or an air intake without openings at both ends can be used, with the air intake port simply set at the top of the air intake.

[0019] Furthermore, an elastic silicone pad is connected to the bottom surface of the fan-shaped air knife, and the elastic silicone pad is provided with air holes corresponding to the air outlet holes on the fan-shaped air knife.

[0020] Secondly, this application provides a casting film machine, including the air knife structure described above.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0022] (1) By setting the air knife to a fan-shaped structure, this application increases the coverage area of ​​the airflow, shortens the cooling and shaping time of the cast film, and improves the production efficiency of the cast film. At the same time, the fan-shaped air knife is connected to two fixed plates by a detachable connector, so the fan-shaped air knife can be replaced according to actual needs.

[0023] (2) The fixing plate of this application is connected to the outer wall of the air inlet in a hinged manner. The distance between the two fixing plates can be adjusted by rotating the fixing plate, thereby allowing the installation of fan-shaped air knives of different specifications, which enhances the functionality of the structure and expands its application range.

[0024] (3) The gas distributor connected to the fan-shaped part of this application can also achieve the effect of diverting the flow, making the gas dispersion more uniform, thereby making the cooling more uniform and improving the quality of the cast film produced.

[0025] (4) By connecting the telescopic structure between the two fixed plates, the distance between the two fixed plates can be adjusted by extending and shortening the telescopic structure. In addition to adjusting the distance between the two fixed plates, the telescopic structure can also provide some support, making the fixed plates more stable.

[0026] (5) By setting the air inlet at the top of the air inlet cylinder, the gas is first dispersed in the conical gas dispersion chamber after being blown vertically down from top to bottom, and then dispersed a second time through the gas separator, thus achieving the effect of two dispersions of the gas and further improving the uniformity of cooling.

[0027] (6) By attaching an elastic silicone pad to the bottom surface of the fan-shaped air knife, the fan-shaped air knife and the surface of the cooling roller can form a flexible contact, which increases the effective working area and avoids wear between the fan-shaped air knife and the cooling roller. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of an air knife for a casting film machine according to Embodiment 1 of this utility model;

[0030] Figure 2 for Figure 1Enlarged view of A in the middle;

[0031] Figure 3 This is a schematic diagram of the fan-shaped air knife in Embodiment 1 of this utility model;

[0032] Figure 4 This is a bottom view of the air intake cylinder in Embodiment 1 of this utility model;

[0033] Figure 5 This is a front view of an air knife structure for a casting film machine according to Embodiment 1 of this utility model;

[0034] Figure 6 This is a side view of an air knife structure for a casting film machine according to Embodiment 1 of this utility model;

[0035] Figure 7 This is a front view of an air knife structure for a casting film machine according to Embodiment 2 of this utility model;

[0036] Figure 8 This is a side view of an air knife structure for a casting film machine according to Embodiment 3 of this utility model;

[0037] Figure 9 This is a schematic diagram of the telescopic structure in Embodiment 3 of this utility model;

[0038] Figure 10 This is a schematic diagram of the telescopic structure in Embodiment 4 of this utility model;

[0039] Figure 11 This is a schematic diagram of an air knife structure for a casting film machine in Embodiment 5 of this utility model.

[0040] The attached diagram shows the markings and corresponding component names:

[0041] 01-Fixed plate, 02-Air inlet cylinder, 03-Air inlet, 04-Windproof cloth, 05-Sloping plate, 06-Vertical plate, 07-Fan-shaped air knife, 08-Air outlet, 09-Locking bolt, 10-Air outlet, 11-Gas distributor, 12-Elastic silicone pad, 13-Telescopic structure, 14-Fixed rod, 15-Fixed hole, 16-Positioning pin, 17-Moving rod, 18-Rotating sleeve, 19-Moving rod one, 20-Moving rod two, 21-End cap, 22-Conical gas dispersion chamber. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a joint, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] Example 1

[0047] like Figures 1-6 As shown, this embodiment provides an air knife structure for a casting film machine, including an air inlet cylinder 02, which has an air inlet 03 and an air outlet 10. Two fixing plates 01 are hinged to the air inlet cylinder 02, and the bottom ends of the two fixing plates 01 are connected to a fan-shaped air knife 07 via a detachable connector. The fan-shaped air knife 07 has multiple air outlets 08, and a gas distributor 11 is connected to the fan-shaped air knife 07. The gas distributor 11 has multiple air holes. Both ends of the two fixing plates 01 are connected to a windproof cloth 04.

[0048] Specifically, the fixing plate 01 can be made of transparent glass.

[0049] Specifically, the detachable connector includes bolt holes provided on the fixed plate 01 and the fan-shaped air knife 07, and the fan-shaped air knife 07 is connected to the fixed plate 01 by installing locking bolts 09 in the bolt holes.

[0050] Specifically, the gas separator 11 includes two vertical plates 06 connected to the fan-shaped air knife 07. Each of the two vertical plates 06 is connected to an inclined plate 05, and both the vertical plates 06 and the inclined plates 05 are provided with multiple air holes.

[0051] Specifically, in order to make flexible contact between the fan-shaped air knife 07 and the surface of the cooling roller, an elastic silicone pad 12 is connected to the bottom surface of the fan-shaped air knife 07, and the elastic silicone pad 12 is provided with air holes corresponding to the air outlet holes 08 on the fan-shaped air knife 07.

[0052] When using this air knife structure, air can be introduced through one end of the air inlet cylinder 02 or both ends can be introduced simultaneously. After the gas enters the air inlet cylinder 02, it enters the cavity formed by the fixed plate 01, the fan-shaped air knife 07, and the windproof cloth 04 from the air outlet 10. The gas is first dispersed by the gas diversion plate, and the dispersed gas is discharged from the fan-shaped air knife 07, pressing the molten film onto the surface of the cooling roller, so that the film can be quickly shaped and obtain a flat surface.

[0053] This air knife structure, by setting the air knife in a fan shape, increases the airflow coverage area, shortens the cooling and setting time of the cast film, and improves the production efficiency of the cast film. Simultaneously, the fan-shaped air knife 07 is connected to two fixed plates 01 via detachable connectors, allowing for easy replacement of the fan-shaped air knife 07 as needed. Furthermore, the fixed plates 01 are hinged to the outer wall of the air inlet cylinder 02, allowing for adjustment of the spacing between the two fixed plates 01 by rotating them. This enables the installation of fan-shaped air knives 07 of different specifications, enhancing the functionality of the structure and expanding its application range. Moreover, the gas distributor 11 connected to the fan-shaped air knife also provides a flow-dividing effect, resulting in more uniform gas dispersion and thus more uniform cooling, improving the quality of the produced cast film.

[0054] Example 2

[0055] Based on Example 1, such as Figure 7 As shown, this embodiment provides an air knife structure for a casting film machine. The difference from Embodiment 1 is that the gas distributor 11 in this embodiment is a hemispherical structure; the hemispherical distributor has multiple air holes. Other structural features are exactly the same as in Embodiment 1.

[0056] In this embodiment, the gas separator 11 is configured as a hemispherical structure, which enables the gas separator 11 to also have a good gas dispersion effect, and the installation structure is also very simple.

[0057] Example 3

[0058] Based on Example 1, such as Figure 8 and Figure 9As shown, this embodiment provides an air knife structure for a casting film machine. The difference from Embodiment 1 is that a telescopic structure 13 connects the two fixed plates 01 in this embodiment. The telescopic structure 13 includes a movable rod 17 connected to one of the fixed plates 01, and a fixed rod 14 connected to the other fixed plate 01. The fixed rod 14 is a hollow structure. The movable rod 17 is sleeved inside the fixed plate 01. Multiple fixing holes 15 are spaced apart on the movable rod 17, and mounting holes are provided on the fixed rod 14. When the fixing holes 15 are aligned with the mounting holes, positioning pins 16 are inserted into the fixing holes 15 and the mounting holes to lock the movable rod 17 and the fixed rod 14 together. Other structural features are completely identical to those in Embodiment 1.

[0059] Compared with Embodiment 1, the advantage of this embodiment is that by connecting the telescopic structure 13 between the two fixed plates 01, the distance between the two fixed plates 01 can be adjusted by extending and shortening the telescopic structure 13. In addition to adjusting the distance between the two fixed plates 01, the telescopic structure 13 can also provide some support, making the fixed plates 01 more stable.

[0060] Example 4

[0061] Based on Example 3, such as Figure 10 As shown, this embodiment provides an air knife structure for a casting film machine. The difference from Embodiment 3 is that the telescopic structure 13 in this embodiment includes a first movable rod 19 and a second movable rod 20 respectively connected to two fixed plates 01. Both the first movable rod 19 and the second movable rod 20 are provided with external threads. The first movable rod 19 and the second movable rod 20 are connected by a rotating sleeve 18, which is provided with internal threads. The first movable rod 19 and the second movable rod 20 are threadedly connected to the rotating sleeve 18. Other structural features are the same as in Embodiment 3.

[0062] Compared with Embodiment 3, the advantage of this embodiment is that it uses a threaded connection to connect the movable rod 19 and the movable rod 20. Therefore, when it is necessary to adjust the included angle between the two fixed plates 01, it is only necessary to rotate the rotating sleeve 18, which makes the operation more convenient.

[0063] Example 5

[0064] Based on Example 1, such as Figure 11 As shown, this embodiment of an air knife structure for a casting film machine differs from Embodiment 1 in that the air inlet cylinder 02 in this embodiment has end caps 21 installed at both ends, the air inlet 03 is located at the top of the air inlet cylinder 02, and a conical gas dispersion chamber 22 is connected to the air inlet 03. Other structural features are exactly the same as in Embodiment 1.

[0065] Compared with Example 1, the advantage of this example is that by setting the air inlet 03 at the top of the air inlet cylinder 02, the gas can be dispersed for the first time in the conical gas dispersion chamber 22 after being blown vertically down from top to bottom, and then dispersed for the second time through the gas separator 11. This achieves a two-stage dispersion effect on the gas, further improving the uniformity of cooling.

[0066] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An air knife structure for a cast film machine, characterized by, The utility model provides an air knife structure, including air inlet cylinder (02), be provided with air inlet (03) and air outlet (10) on air inlet cylinder (02), two fixed plates (01) are hinged on air inlet cylinder (02), the bottom end of two fixed plates (01) is connected with fan -shaped air knife (07) through detachable connecting piece, be provided with a plurality of air outlet holes (08) on fan -shaped air knife (07), gas shunt (11) is connected on fan -shaped air knife (07), a plurality of air holes are provided on gas shunt (11), the both ends of two fixed plates (01) are connected with windbreak cloth (04).

2. The air knife structure for a cast film machine according to claim 1, wherein The detachable connecting piece includes bolt holes provided on the fixed plate (01) and the fan-shaped air knife (07), the fan-shaped air knife (07) is connected with the fixed plate (01) by installing a locking bolt (09) in the bolt hole.

3. The air knife structure for a cast film machine according to claim 1, wherein The gas shunt (11) includes two vertical plates (06) connected to the fan-shaped air knife (07), and an inclined plate (05) is connected to each of the two vertical plates (06). A plurality of air holes are provided on the vertical plate (06) and the inclined plate (05).

4. The air knife structure for a cast film machine according to claim 1, wherein The gas shunt (11) has a semi-spherical structure.

5. The air knife structure for a cast film machine according to claim 1, wherein A telescopic structure (13) is connected between the two fixed plates (01).

6. The air knife structure for a cast film machine according to claim 5, wherein The telescopic structure (13) includes a moving rod (17) connected to one of the fixed plates (01), and a fixed rod (14) connected to the other fixed plate (01). The fixed rod (14) has a hollow structure. The moving rod (17) is sleeved inside the fixed plate (01). A plurality of fixing holes (15) are provided on the moving rod (17) at intervals. A mounting hole is provided on the fixed rod (14). When the fixing hole (15) and the mounting hole are aligned, the moving rod (17) and the fixed rod (14) are locked by inserting a positioning pin (16) into the fixing hole (15) and the mounting hole.

7. The air knife structure for a cast film machine according to claim 5, wherein The telescopic structure (13) includes a movable rod one (19) and a movable rod two (20) connected to the two fixed plates (01) respectively. The movable rod one (19) and the movable rod two (20) are provided with external threads. The movable rod one (19) and the movable rod two (20) are connected by a rotating sleeve (18). The rotating sleeve (18) is provided with internal threads. The movable rod one (19) and the movable rod two (20) are threadedly connected to the rotating sleeve (18).

8. The air knife structure for a cast film machine according to claim 1, wherein End covers (21) are installed at both ends of the air inlet cylinder (02). The air inlet (03) is provided at the top of the air inlet cylinder (02), and a conical gas dispersion chamber (22) is connected to the air inlet (03).

9. The air knife structure for a cast film machine according to claim 1, wherein An elastic silica gel pad (12) is connected to the bottom surface of the fan-shaped air knife (07). The elastic silica gel pad (12) is provided with air holes corresponding to the air outlet holes (08) on the fan-shaped air knife (07).

10. A cast film machine characterized by, The utility model discloses an air knife structure as claimed in any one of claims 1-9. The utility model discloses an air knife structure as claimed in any one of claims 1-9.

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