Edge blowing air knife capable of being adjusted in multiple directions

Abstract

The utility model relates to the technical field of casting piece edge blowing air knives, in particular to an edge blowing air knife capable of being adjusted in multiple directions, which comprises an air knife support, a main air knife and a die head, the main air knife and the die head are arranged on the air knife support, a fixing shaft is fixedly connected onto the air knife support, and an edge blowing mechanism is arranged on the fixing shaft. The edge blowing mechanism comprises a fixing frame fixedly connected to the air knife support, and the fixing frame is connected with an edge blowing pipe through an adjusting device. According to the edge blowing air knife capable of being adjusted in multiple directions, by arranging the adjusting device, the edge blowing pipe can be subjected to distance adjustment and angle adjustment in multiple directions, and then the edge blowing air knife can be adjusted according to the requirements of different raw material particles and casting pieces with different thicknesses, so that the normal production requirements are met, the forming thicknesses and widths of different thin films are guaranteed, and the waste film output rate is reduced; and the economic benefit in the film production process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of casting edge blowing air knives, in particular to a multi-directionally adjustable edge blowing air knife. Background Art

[0002] During the production of BOPP ultra-thin films, the molten material passes through the die lip and is extruded in sheets. The air line blown by the casting sheet blowing air knife is attached to the chilled roller to cool down into a thick sheet. The blowing edge installed between the die and the air knife is crucial to the subsequent transverse stretching of the film and is a key step in whether the film can achieve smooth transverse stretching in the transverse stretching box.

[0003] However, the existing edge blowing design can only be adjusted in the XY axis. In the actual production process, the height of the edge blowing tube, the distance between the edge blowing tube and the chilling roller, and the edge blowing angle cannot be adjusted according to the raw material, thickness, and production speed of the film to be produced. Therefore, it often has a negative effect on the film edge attachment effect and thickness consistency, and also causes excessive heat shrinkage when the film is cooled, thereby affecting the width of the film and reducing the economic benefits of the film production process. Utility Model Content

[0004] The purpose of the embodiment of the utility model is to provide a multi-directionally adjustable edge blowing air knife, which solves the problem that the existing edge blowing device cannot adjust the edge blowing position in multiple directions.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A multi-directionally adjustable edge blowing air knife comprises an air knife bracket, a main air knife and a die head arranged on the air knife bracket, wherein a fixed shaft is fixedly connected to the air knife bracket, and an edge blowing mechanism is arranged on the fixed shaft;

[0007] The edge blowing mechanism comprises a fixing frame fixedly connected to the air knife support, and the fixing frame is connected to the edge blowing pipe through an adjusting device.

[0008] Preferably, the adjusting device comprises a Z-axial connecting assembly, a Y-axial connecting assembly, an X-axial connecting assembly and a radial connecting assembly which are connected in sequence, wherein the Z-axial connecting assembly is connected to a fixing frame, and the radial connecting assembly is connected to the edge blowing pipe.

[0009] Preferably, the Z-axial connection assembly includes a fixed plate fixedly connected to a fixed frame, a Z guide rod is fixedly connected to the fixed plate, a sliding folding plate is slidably connected to the surface of the Z guide rod, and a Y-axial connection assembly is connected to the sliding folding plate.

[0010] Preferably, the Y-axis connection assembly comprises a Y-guide rail fixedly connected to the sliding folding plate, a sliding frame is slidably connected to the surface of the Y-guide rail, and the sliding frame is connected to the X-axis connection assembly.

[0011] Preferably, a first threaded rod is threadedly connected to the inner wall of the sliding folding plate, one end of the first threaded rod passes through one side of the sliding folding plate and abuts against the Z guide rod, and the other end passes through the other side of the sliding folding plate and is fixedly connected to the first handle.

[0012] Preferably, a connecting plate is fixedly connected to the bottom of the sliding frame, an annular through groove is formed on the connecting plate, the annular through groove is sleeved on the outside of the first threaded rod, a pressure plate is fixedly connected to the first threaded rod, and one side of the pressure plate is in contact with the connecting plate.

[0013] Preferably, the X-axial connection assembly includes an X-guide rod with one end fixedly connected to the sliding frame, a sliding seat is slidably connected to the surface of the X-guide rod, a connecting frame is fixedly connected to the sliding seat, and the connecting frame is connected to the radial connection assembly.

[0014] Preferably, the radial connection assembly comprises a fixed rod with one end fixedly connected to the connecting frame, a rotating sleeve is rotatably connected to the surface of the fixed rod, and an inner wall of the rotating sleeve is rotatably connected to the surface of the edge blowing tube.

[0015] Preferably, the edge blowing pipe is connected to an air inlet pipe.

[0016] By means of the above technical solution, the utility model provides a multi-directionally adjustable edge blowing air knife. It has at least the following beneficial effects: the multi-directionally adjustable edge blowing air knife can adjust the edge blowing tube in multiple directions by setting an adjustment device, and can further adjust it according to the needs of different raw material particles and different thickness casting sheets to meet its normal production needs, ensure the thickness and width of different film forming, reduce the waste film output rate, and improve the economic benefits in the film production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of a local structure in an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the edge blowing mechanism and the fixed shaft in the embodiment of the utility model;

[0021] Figure 4This is a schematic diagram of a Z-axis connection assembly in an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of a Y-axis connection assembly in an embodiment of the utility model;

[0023] Figure 6 It is a schematic diagram of the X-axis connection assembly in an embodiment of the present utility model.

[0024] In the figure: 1. air knife bracket; 2. fixed shaft; 3. main air knife; 4. edge blowing mechanism; 41. fixed frame; 42. adjusting device; 421. fixed plate; 422. Z guide rod; 423. sliding folding plate; 424. Y guide rail; 425. sliding frame; 426. X guide rod; 427. sliding seat; 428. connecting frame; 429. fixed rod; 4210. rotating sleeve; 4211. first threaded rod; 4212. pressing plate; 4213. first rotating handle; 4214. connecting plate; 4215. second threaded rod; 4216. second rotating handle; 43. edge blowing pipe; 431. air inlet pipe; 5. chilling roller; 6. die head. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 6 , a technical solution provided by the utility model:

[0027] A multi-directionally adjustable edge blowing air knife comprises an air knife support 1, a main air knife 3 and a die head 6 arranged on the air knife support 1, and a chilling roller 5 is arranged on one side of the die head 6. During operation, the molten material passes through the lip of the die head 6 and is extruded in a sheet shape, and then the air line blown by the main air knife 3 adheres to the chilling roller 5 to cool down into a thick sheet. A fixed shaft 2 is fixedly connected to the air knife support 1, and two edge blowing mechanisms 4 are symmetrically arranged on the fixed shaft 2.

[0028] The two edge blowing mechanisms 4 blow air to both sides of the cast film, so that the die edge fits the chill roller 5. The edge blowing mechanism 4 plays an important role in film forming:

[0029] 1. The angle of the edge blowing nozzle affects the adhesion effect of the film edge. The film is attached to the chilled roller 5 in three ways: circular surface attachment, divergent fan-shaped attachment, and wide line attachment. When producing particles from different manufacturers and films of different thicknesses, it needs to be adjusted to meet normal production needs.

[0030] Second, it affects the stretching film-forming properties. When the film enters the transverse stretching section after longitudinal stretching, the chain clamp will clamp the thick edges on both sides of the film, and then stretch it transversely in the transverse stretching section. The uneven edges and uneven edge thickness will directly cause the film to be unclamped or torn;

[0031] 3. Influence on the width of thick sheets. The edge blowing mechanism 4 needs to be adjusted between the die head 6 and the air knife to a position that can adapt to different particles, different film thicknesses and different production speeds. This position requires the molten film to be attached to the chilled roller 5 to cool the edge before cooling, so as to reduce the excessive width change caused by thermal shrinkage. Excessive shrinkage will directly reduce the input-output ratio in production.

[0032] To do this, see Figure 2 The edge blowing mechanism 4 includes a fixing frame 41 fixedly connected to the air knife bracket 1, the fixing frame 41 is connected to the edge blowing pipe 43 through the adjusting device 42, one end of the edge blowing pipe 43 is provided with a blowing nozzle, and the other end is connected to an air inlet pipe 431, and the air inlet pipe 431 is used to connect with an external blowing device to provide airflow into the edge blowing pipe 43.

[0033] In this embodiment, the adjusting device 42 includes a Z-axial connecting component, a Y-axial connecting component, an X-axial connecting component and a radial connecting component which are connected in sequence, wherein the Z-axial connecting component is connected to the fixing frame 41, and the radial connecting component is connected to the edge blowing tube 43, so that the edge blowing tube 43 can realize horizontal adjustment in the X-axis direction, the Y-axis direction, and the X-axis direction, as well as angle adjustment in a diameter direction around the edge blowing tube 43.

[0034] See also Figure 4 The Z-axial connection assembly includes a fixed plate 421 fixedly connected to the fixed frame 41, a Z guide rod 422 fixedly connected to the fixed plate 421, a sliding folding plate 423 slidably connected to the surface of the Z guide rod 422, and a Y-axial connection assembly connected to the sliding folding plate 423. By sliding the sliding folding plate 423 on the Z guide rod 422, the height of the Y-axial connection assembly can be adjusted, thereby adjusting the height of the edge blowing tube 43.

[0035] In order to overcome the gravity of structures such as the sliding fold plate 423 and the Y-axial connecting assembly, a first threaded rod 4211 is threadedly connected to the inner wall of the sliding fold plate 423. One end of the first threaded rod 4211 passes through one side of the sliding fold plate 423 and abuts against the Z guide rod 422. The relative movement between the first threaded rod 4211 and the Z guide rod 422 is limited by friction. The other end passes through the other side of the sliding fold plate 423 and is fixedly connected to the first rotating handle 4213. By rotating the first rotating handle 4213, the position of the first threaded rod 4211 in the sliding fold plate 423 can be adjusted so that one end of the first threaded rod 4211 is tightly abutted against the Z guide rod 422, thereby limiting the sliding fold plate 423.

[0036] See also Figure 3 and Figure 5 The Y-axial connection component includes a Y-guide rail 424 fixedly connected to the sliding folding plate 423 on one side, and a sliding frame 425 is slidably connected to the surface of the Y-guide rail 424. The sliding frame 425 is connected to the X-axial connection component. The sliding frame 425 can slide along the length direction of the Y-guide rail 424, thereby adjusting the distance between the edge blowing tube 43 and the chilling roller 5.

[0037] Furthermore, a connecting plate 4214 is fixedly connected to the bottom of the sliding frame 425, and an annular through groove is formed on the connecting plate 4214, which is sleeved outside the first threaded rod 4211, and the width of the annular through groove is greater than the outer diameter of the first threaded rod 4211, so that the connecting plate 4214 can be prevented from contacting the first threaded rod 4211. When the sliding frame 425 slides along the Y-guide rail 424, the annular through groove will move outside the first threaded rod 4211. A pressing plate 4212 is fixedly connected to the first threaded rod 4211, and one side of the pressing plate 4212 abuts against the connecting plate 4214, so that the connecting plate 4214 is pressed tightly against the sliding folding plate 423, thereby limiting the sliding frame 425.

[0038] Please continue reading Figure 5 The X-axis connection assembly includes an X-guide rod 426 fixedly connected to the sliding frame 425 at one end, a sliding seat 427 is slidably connected to the surface of the X-guide rod 426, a connecting frame 428 is fixedly connected to the sliding seat 427, and the connecting frame 428 is connected to the radial connection assembly, so that the edge blowing tube 43 can be driven to move along the X-axis direction through the radial connection assembly. A second threaded rod 4215 is threadedly connected to the inner wall of the sliding seat 427, one end of the second threaded rod 4215 is in contact with the X-guide rod 426, and the other end passes through the sliding seat 427 and is fixedly connected to the second rotating handle 4216. By screwing the second rotating handle 4216, the second threaded rod 4215 can be tightly pressed against the X-guide rod 426, thereby improving the stability of the structure.

[0039] See also Figure 6 The radial connection assembly includes a fixed rod 429 with one end fixedly connected to the connecting frame 428, and the surface of the fixed rod 429 is rotatably connected to the rotating sleeve 4210, and the inner wall of the rotating sleeve 4210 is rotatably connected to the surface of the edge blowing pipe 43. The edge blowing pipe 43 can rotate around the fixed rod 429 along with the rotating sleeve 4210, and can also complete self-rotation inside the rotating sleeve 4210, thereby realizing rotation in two directions and realizing adjustment of different angles of the edge blowing pipe 43. The fixed rod 429, the rotating sleeve 4210 and the edge blowing pipe 43 are limited by friction to prevent the structure from rotating at will.

[0040] When the multi-directionally adjustable edge blowing air knife of the utility model is used, the position and angle of the edge blowing tube 43 are first adjusted according to the particles, thickness and production speed of different films. After adjustment, the sliding folding plate 423 is limited in the Z axis by the first threaded rod 4211, the sliding frame 425 is limited in the Y axis by the pressing plate 4212, and the sliding seat 427 is limited in the X axis by the second threaded rod 4215, so as to improve the stability of the structure, ensure the thickness and width of different film forming, and reduce the output rate of waste film.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-directionally adjustable edge blowing air knife, comprising an air knife support (1), a main air knife (3) arranged on the air knife support (1) and a die head (6), characterized in that: The air knife support (1) is fixedly connected to a fixed shaft (2), and the fixed shaft (2) is provided with an edge blowing mechanism (4); The edge blowing mechanism (4) comprises a fixing frame (41) fixedly connected to the air knife support (1); the fixing frame (41) is connected to an edge blowing pipe (43) via an adjusting device (42).

2. The multi-directionally adjustable edge blowing air knife according to claim 1, characterized in that: The regulating device (42) comprises a Z-axial connection assembly, a Y-axial connection assembly, an X-axial connection assembly and a radial connection assembly which are connected in sequence, wherein the Z-axial connection assembly is connected to a fixing frame (41), and the radial connection assembly is connected to an edge blowing pipe (43).

3. The multi-directionally adjustable edge blowing air knife according to claim 2, characterized in that: The Z-axis connection assembly comprises a fixed plate (421) fixedly connected to a fixed frame (41), a Z guide rod (422) fixedly connected to the fixed plate (421), a sliding folding plate (423) slidably connected to the surface of the Z guide rod (422), and a Y-axis connection assembly connected to the sliding folding plate (423).

4. The multi-directionally adjustable edge blowing air knife according to claim 3, characterized in that: The Y-axis connection assembly comprises a Y-axis guide rail (424) fixedly connected to the sliding folding plate (423); a sliding frame (425) is slidably connected to the surface of the Y-axis guide rail (424); and an X-axis connection assembly is connected to the sliding frame (425).

5. The multi-directionally adjustable edge blowing air knife according to claim 4, characterized in that: A first threaded rod (4211) is threadedly connected to the inner wall of the sliding folding plate (423), one end of the first threaded rod (4211) passes through one side of the sliding folding plate (423) and abuts against the Z guide rod (422), and the other end passes through the other side of the sliding folding plate (423) and is fixedly connected to the first rotating handle (4213).

6. The multi-directionally adjustable edge blowing air knife according to claim 5, characterized in that: The bottom of the sliding frame (425) is fixedly connected to a connecting plate (4214), the connecting plate (4214) is provided with an annular through groove, the annular through groove is sleeved on the outside of the first threaded rod (4211), the first threaded rod (4211) is fixedly connected to a pressing plate (4212), one side of the pressing plate (4212) is in contact with the connecting plate (4214).

7. The multi-directionally adjustable edge blowing air knife according to claim 4, characterized in that: The X-axis connection assembly comprises an X-guide rod (426) with one end fixedly connected to a sliding frame (425); a sliding seat (427) is slidably connected to the surface of the X-guide rod (426); a connecting frame (428) is fixedly connected to the sliding seat (427); and the connecting frame (428) is connected to the radial connection assembly.

8. The multi-directionally adjustable edge blowing air knife according to claim 7, characterized in that: The radial connection assembly connection includes a fixed rod (429) having one end fixedly connected to a connecting frame (428), a rotating sleeve (4210) being rotatably connected to the surface of the fixed rod (429), and an inner wall of the rotating sleeve (4210) being rotatably connected to the surface of the edge blowing tube (43).

9. The multi-directionally adjustable edge blowing air knife according to claim 8, characterized in that: The edge blowing pipe (43) is connected to an air inlet pipe (431).

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