An adjustable wind speed blown film machine

Abstract

This utility model discloses a blown film machine with adjustable wind speed, including a blown film tube, a filter barrel, and a storage box. The blown film tube has a sealing cap at its top, and a corresponding lifting piston slides inside the blown film tube. The bottom of the sealing cap has a guide rod and a threaded rod, with a rotating handle connected to the top of the threaded rod. The top of the lifting piston has an insertion hole and a threaded hole, and the outer surface of the lifting piston has an annular groove. The inner wall of the blown film tube has an annular mounting groove, and an annular airbag ring is installed inside the annular mounting groove. An air supply pipe is inserted into the outer side of the blown film tube, with its inner end connected to the surface of the annular airbag ring and its outer end connected to an interface. A first filter outer frame plate is inserted into the filter barrel. This device, through the expansion of the annular airbag ring, ensures a tight seal by pressing the annular airbag ring against the inner wall of the annular groove and the inner wall of the annular mounting groove, preventing leakage. This avoids the inconvenience caused by rubber rings in traditional devices and improves the practicality of the device.

Description

Technical Field

[0001] This utility model relates to the field of blown film machine technology, and in particular to a blown film machine with adjustable wind speed. Background Technology

[0002] Plastic film is a thin film made of polyvinyl chloride, polystyrene, or other resins. In the production process, a blown film machine is typically used to blow molten plastic particles into a film. Currently, blown film machines are widely used, but existing machines still have some problems. For example, the utility model patent with authorization announcement number CN216941806U discloses a blown film machine with an adjustable fan. This device uses a rubber ring to improve the sealing effect between the piston and the inner wall of the blown film tube, preventing air leakage and improving the accuracy of adjusting the wind speed. However, the friction generated by the rubber ring increases the grip strength required for manually turning the first handle, leading to increased operational inconvenience. Furthermore, prolonged friction can damage and deform the rubber ring, reducing its sealing performance and affecting the accuracy of wind speed adjustment. Additionally, although the device allows for the disassembly and assembly of the filter tank for maintenance, repair, or replacement of the internal filter layer, this process requires pausing the machine's operation, delaying work and reducing efficiency. Therefore, we have designed a blown film machine with adjustable wind speed to solve these technical problems. Utility Model Content

[0003] The purpose of this invention is to provide a blown film machine with adjustable wind speed to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An adjustable-speed blown film machine includes a blown film tube, a filter barrel, and a storage tank, all mounted above a worktable. A sealing cap is fixed to the top of the blown film tube. Multiple air outlets are formed through the outer surface of the blown film tube. A corresponding lifting piston is slidably mounted inside the blown film tube. A guide rod is fixed to the bottom left side of the sealing cap, and a threaded rod is rotatably mounted to the bottom right side of the sealing cap. The top of the threaded rod extends to the top of the sealing cap and is connected to a handle. The top of the lifting piston has an insertion hole for the guide rod to slide into, and a threaded hole adapted to the threaded rod. An annular groove is formed along the circumference of the outer surface of the lifting piston. The number of annular grooves is multiple, and they are evenly distributed vertically along the outer surface of the lifting piston. The inner wall of the blown film tube has an annular mounting groove along its circumference. The annular mounting groove is located above and close to the air outlet. An annular airbag ring is provided inside the annular mounting groove along its circumference. An air supply pipe is inserted into one side of the outer surface of the blown film tube. The inner end of the air supply pipe extends into the annular mounting groove and is fixedly connected to the surface of the annular airbag ring. The outer end of the air supply pipe is connected to an interface, which is connected to an air source through an external air pipe. A first filter outer frame plate is detachably inserted into the filter barrel. Multiple second filter outer frame plates are stored in the storage box.

[0006] As a preferred embodiment of the present invention: a transparent observation window is provided on one side of the outer surface of the blown film tube, the transparent observation window is located above and close to the annular mounting groove, and an indicator mark is provided at the center of the outer surface of the transparent observation window.

[0007] As a further preferred embodiment of this utility model: multiple air inlets are respectively opened around the upper part of the outer surface of the filter barrel, and two insertion ports are opened on the right side surface of the filter barrel. The insertion ports are for the first filter outer frame plate to be slidably inserted. A filter screen is provided on the inner side of the first filter outer frame plate, and a guide rail groove is opened on the inner side wall of the filter barrel for the first filter outer frame plate to be slidably inserted.

[0008] As a further preferred embodiment of this utility model: the filter bucket has a rectangular structure, and a handle is provided on the right outer wall of the first filter outer frame plate.

[0009] As a further preferred embodiment of this utility model, the structure of the second filter outer frame plate is the same as that of the first filter outer frame plate.

[0010] As a further preferred embodiment of this utility model: the top of the storage box is movably provided with a box door.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. When adjusting the wind speed, this device works by rotating the threaded rod via a handle, which in turn controls the downward movement of the lifting piston. During this process, multiple vertically spaced annular grooves also move downward. When they reach the appropriate position, i.e., when one of the annular grooves aligns with the annular mounting groove, an external air pipe can be connected through the interface. Air can then be inflated into the annular airbag ring using an external tool, causing the annular airbag ring to expand and press against the inner walls of the annular groove and the annular mounting groove, thus ensuring a tight seal and preventing leakage. This avoids the inconvenience caused by rubber rings in traditional devices, improves the practicality of the device, and is worthy of widespread use.

[0013] 2. This device has two layers of first filter frames inside the storage box. This improves the air filtration effect and, when replacement is needed, the upper first filter frame is usually replaced first, while the lower first filter frame continues to filter. Once the upper first filter frame has been replaced, the next first filter frame that needs to be replaced will be replaced as well. The entire disassembly and assembly process uses one filter screen in use, thus ensuring the continuous normal operation of the device and improving work efficiency. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 This is a partial structural schematic diagram of the present invention;

[0018] Figure 4 This is a partial structural schematic diagram of the present invention.

[0019] The components are: 1-blown membrane tube, 2-filter barrel, 3-storage box, 4-sealing cover, 5-handle, 6-threaded rod, 7-lifting piston, 8-transparent observation window, 9-indicator mark, 10-annular mounting groove, 11-annular airbag ring, 12-air outlet, 13-interface, 14-air supply pipe, 15-annular groove, 16-guide rod, 17-air inlet, 18-first filter outer frame plate, 19-handle, 20-box door, 21-second filter outer frame plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. In the description of the present utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical 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 the present utility model based on the specific circumstances.

[0021] Please see Figure 1-4 In this embodiment of the utility model, a blown film machine with adjustable wind speed includes a blown film pipe 1, a filter barrel 2, and a storage box 3 set above the workbench. The top of the workbench is also equipped with common equipment such as an injection molding machine, a blown air pipe, and a connecting pipe. For details, please refer to the utility model patent with authorized announcement number CN216941806U, which discloses a blown film machine with adjustable fan, and the utility model patent with authorized announcement number CN214605882U, which discloses a blown film machine for plastic film. This is prior art, easy to implement, and not the innovation of this application, so it will not be described in detail.

[0022] A sealing cap 4 is fixedly installed at the top of the blown film tube 1. Multiple air inlets 12 are opened through the outer surface of the blown film tube 1. A corresponding lifting piston 7 is slidably installed inside the blown film tube 1. A guide rod 16 is fixedly installed on the bottom left side of the sealing cap 4. A threaded rod 6 is rotatably installed on the bottom right side of the sealing cap 4. The top of the threaded rod 6 extends through to the top of the sealing cap 4 and is connected to a handle 5. An insertion hole for the guide rod 16 to slide into is opened at the top of the lifting piston 7. A threaded hole adapted to the threaded rod 6 is also opened at the top of the lifting piston 7. An annular groove 15 is opened along its circumference on the outer surface of the lifting piston 7. There are multiple annular grooves 15, which are evenly distributed vertically along the outer surface of the lifting piston 7. The inner wall of the blown film tube 1 is along The annular mounting groove 10 is provided in the circumferential direction. The annular mounting groove 10 is located above and close to the air outlet 12. An annular airbag ring 11 is provided inside the annular mounting groove 10 along its circumferential direction. An air supply pipe 14 is inserted into one side of the outer surface of the blown film tube 1. The inner end of the air supply pipe 14 extends into the annular mounting groove 10 and is fixedly connected to the surface of the annular airbag ring 11. The outer end of the air supply pipe 14 is connected to an interface 13. The interface 13 is connected to an air source through an external air pipe. A first filter outer frame plate 18 is detachably inserted into the filter canister 2. A plurality of second filter outer frame plates 21 are stored in the storage box 3. The structure of the second filter outer frame plate 21 is the same as that of the first filter outer frame plate 18. A door 20 is movably provided on the top of the storage box 3.

[0023] A transparent observation window 8 is provided on one side of the outer surface of the blown film tube 1. The transparent observation window 8 is located above and close to the annular mounting groove 10. An indicator line 9 is provided at the center of the outer surface of the transparent observation window 8. As the lifting piston 7 moves downward, multiple annular grooves 15 move downward accordingly. The operator can observe the position of the annular grooves 15 through the transparent observation window 8 and align the inner bottom wall of the corresponding annular groove 15 with the indicator line 9 to determine that the annular groove 15 located below the transparent observation window 8 is aligned with the annular mounting groove 10. This ensures that the annular airbag ring 11 is located between the annular groove 15 and the annular mounting groove 10 when it is inflated. This ensures that the inflated annular airbag ring 11 fits and presses well against the inner wall of the annular groove 15 and the inner wall of the annular mounting groove 10, thereby ensuring a tight seal.

[0024] The filter barrel 2 has a rectangular structure. Multiple air inlets 17 are provided around the upper part of the outer surface of the filter barrel 2. Two slots are provided on the right side surface of the filter barrel 2 for the first filter outer frame plate 18 to slide into. The first filter outer frame plate 18 has a filter screen on its inner side. The right outer wall of the first filter outer frame plate 18 has a handle 19. The inner side wall of the filter barrel 2 has a guide rail groove for the first filter outer frame plate 18 to slide into. The first filter outer frame plate 18 is used to filter and purify the air. The second filter outer frame plate 21 is used as a spare. When the first filter outer frame plate 18 needs to be replaced, it can be pulled out through the handle 19. The storage box 3 can be opened immediately, the second filter outer frame plate 21 can be taken out, and the second filter outer frame plate 21 can be quickly inserted into the corresponding slot to ensure the continuous normal operation of the device. The removed first filter outer frame plate 18 can be cleaned and put into the storage box 3 for later use.

[0025] It is worth noting that this device has two layers of first filter outer frame plates 18 inside the storage box 3. On the one hand, this improves the air filtration effect. On the other hand, when replacement is needed, the upper first filter outer frame plate 18 is usually replaced first. At this time, the lower first filter outer frame plate 18 can continue to maintain its filtering function. After the upper first filter outer frame plate 18 is replaced, the next first filter outer frame plate 18 that needs to be replaced will be replaced. The entire disassembly and assembly process uses a filter screen that is in use, so the continuous normal operation of the device can be maintained and the work efficiency can be improved.

[0026] When adjusting the wind speed, this device rotates the threaded rod 6 via the handle 5, controlling the lifting piston 7 to move downwards. During this process, multiple vertically spaced annular grooves 15 also move downwards. When they reach the appropriate position, i.e., one of the annular grooves 15 aligns with the annular mounting groove 10, an external air pipe can be connected via the interface 13. Air can then be inflated into the annular airbag ring 11 using an external tool, causing the annular airbag ring 11 to expand and press against the inner walls of the annular groove 15 and the annular mounting groove 10, thus ensuring a tight seal and preventing leakage. This avoids the inconvenience caused by rubber rings in traditional devices, improves practicality, and is worthy of widespread use.

[0027] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A blown film machine with adjustable wind speed, comprising a blown film pipe (1) disposed above a workbench, a filter barrel (2), and a storage tank (3); characterized in that: The top end of the blown film tube (1) is fixedly provided with a sealing cap (4). Multiple air inlets (12) are opened through the outer surface of the blown film tube (1). A lifting piston (7) adapted to it is slidably provided inside the blown film tube (1). A guide rod (16) is fixedly provided on the bottom left side of the sealing cap (4). A threaded rod (6) is rotatably provided on the bottom right side of the sealing cap (4). The top end of the threaded rod (6) extends through to the top of the sealing cap (4) and is connected to a handle (5). The top of the lifting piston (7) is provided with an insertion hole for the guide rod (16) to slide into. The top of the lifting piston (7) is also provided with a threaded hole adapted to the threaded rod (6). An annular groove (15) is provided along its circumference on the outer surface of the lifting piston (7). The blown film tube ( 1) The inner sidewall is provided with an annular mounting groove (10) along its circumference. The annular mounting groove (10) is located above and close to the air outlet (12). The annular mounting groove (10) is provided with an annular airbag ring (11) along its circumference. An air supply pipe (14) is inserted into one side of the outer surface of the blown film pipe (1). The inner end of the air supply pipe (14) extends into the annular mounting groove (10) and is fixedly connected to the surface of the annular airbag ring (11). The outer end of the air supply pipe (14) is connected to an interface (13). The interface (13) is connected to an air source through an external air pipe. A first filter outer frame plate (18) is detachably inserted into the filter bucket (2). A plurality of second filter outer frame plates (21) are stored in the storage box (3).

2. The blown film machine with adjustable wind speed according to claim 1, characterized in that: A transparent observation window (8) is provided on one side of the outer surface of the blown film tube (1). The transparent observation window (8) is located above and close to the annular mounting groove (10). An indicator line (9) is provided at the center of the outer surface of the transparent observation window (8).

3. The blown film machine with adjustable wind speed according to claim 2, characterized in that: The outer surface of the filter barrel (2) is provided with multiple air inlets (17) around the upper perimeter. The right side surface of the filter barrel (2) is provided with two slots for the first filter outer frame plate (18) to slide into. The first filter outer frame plate (18) is provided with a filter screen on its inner side. The inner side wall of the filter barrel (2) is provided with a guide groove for the first filter outer frame plate (18) to slide into.

4. The blown film machine with adjustable wind speed according to claim 3, characterized in that: The filter barrel (2) has a rectangular structure, and a handle (19) is provided on the right outer wall of the first filter outer frame plate (18).

5. The blown film machine with adjustable wind speed according to claim 4, characterized in that: The structure of the second filter outer frame plate (21) is the same as that of the first filter outer frame plate (18).

6. The blown film machine with adjustable wind speed according to claim 1, characterized in that: The storage box (3) is equipped with a movable door (20) on its top.

7. The blown film machine with adjustable wind speed according to claim 1, characterized in that: The number of annular grooves (15) is multiple, and they are evenly distributed along the outer surface of the lifting piston (7) in the vertical direction.

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