Blowing device of film blowing machine

Abstract

The utility model discloses a blowing device of a film blowing machine in the technical field of film blowing devices, which comprises a blowing rack, a blowing air ring is arranged at the center of the blowing rack, a plurality of groups of supporting vertical rods which are circumferentially and equidistantly arranged around the central axis of the blowing rack are mounted on the outer ring of the top of the blowing rack, and supporting rings are arranged on the plurality of groups of supporting vertical rods; a plurality of sets of adjusting assemblies in one-to-one correspondence with the supporting vertical rods are installed at the top of the supporting ring, the adjusting assemblies are connected with auxiliary parts used for limiting the plastic film, and driving assemblies for controlling the multiple sets of adjusting assemblies to operate at the same time are installed at the top ends of the multiple sets of supporting vertical rods. The blowing device solves the problems that when the blowing device of the existing film blowing machine is used, a limiting ring or a stop lever is often arranged outside the blowing device to limit a blown plastic film, and the limiting ring or the stop lever is inconvenient to flexibly adjust according to the size of a finished product needing to be processed, so that the blowing quality of the finished product is influenced, and the blowing device is not favorable for people to use.

Description

Technical Field

[0001] The utility model relates to the technical field of film blowing devices, in particular to a film blowing device for a film blowing machine. Background Art

[0002] A film blowing machine heats plastic particles to melt them, and then blows air through a blowing port arranged in the middle of an annular extrusion groove to blow air into a tubular film, so that the plastic is stretched and extended due to gas expansion, the thickness is reduced, and its internal space is increased. Finally, it is wound into a coil by a winding machine. Plastic film manufacturers produce plastic films or plastic bags with different thicknesses and sizes according to the needs of different customers.

[0003] When the existing film blowing device of a film blowing machine is in use, a limiting ring or a stop rod is often arranged outside it to limit the blown plastic film. However, the limiting ring or the stop rod is not convenient to be flexibly adjusted according to the size of the finished product to be processed, which will affect the blowing quality of the finished product and is not conducive to people's use. Therefore, those skilled in the art provide a film blowing device for a film blowing machine to solve the problems raised in the above background art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a film blowing device for a film blowing machine to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A film blowing device for a film blowing machine, including a film blowing platform frame, a film blowing air ring is arranged at the center of the film blowing platform frame, and a plurality of support vertical rods arranged at equal intervals in a circumferential manner around its central axis are installed on the outer circle of the top of the film blowing platform frame, and a support ring is arranged on the plurality of support vertical rods;

[0006] A plurality of adjusting components corresponding to the support vertical rods one by one are installed on the top of the support ring, the adjusting components are connected with an auxiliary component for limiting the plastic film, and a driving component for controlling the simultaneous operation of the plurality of adjusting components is installed at the top ends of the plurality of support vertical rods.

[0007] Preferably: The adjusting component includes an adjusting screw rod rotatably installed on the support ring, two movable blocks that can slide in opposite directions on the support vertical rod are threadedly connected to the adjusting screw rod, the upper and lower two movable blocks are both connected with a mounting plate assembled with the auxiliary component through a movable rod, a first gear connected with the driving component is installed at the top end of the adjusting screw rod, and a sliding support frame connected with the mounting plate is arranged on the support vertical rod.

[0008] Preferably: The sliding support frame includes a fixed block welded to the support vertical rod, the fixed block is rotatably connected with the adjusting screw rod through a bearing, and two sliding rods welded to the mounting plate and slidably connected with the fixed block are arranged on the mounting plate.

[0009] Preferably, movable rods are hinged to both sides of the movable block, and a connecting block hinged to the ends of the two groups of movable rods is welded to the side of the mounting plate close to the supporting vertical rod.

[0010] Preferably, the driving assembly includes a circular ring welded to the tops of multiple groups of supporting vertical rods. The circular ring rotates with the adjusting screw rod. A toothed ring meshing with multiple groups of first gears is rotatably connected to the outer ring of the circular ring. A servo motor is fixedly installed at the bottom of the circular ring, and the output shaft of the servo motor is connected to a second gear meshing with the toothed ring.

[0011] Preferably, the auxiliary member includes multiple groups of support frames detachably connected to the mounting plate, and the multiple groups of support frames are arranged equidistantly up and down. A limiting roller is rotatably installed inside each support frame.

[0012] Preferably, a mounting strip is integrally formed on the side of the mounting plate away from the supporting vertical rod, and two butt plates connected to the mounting strip by bolts are welded to the back of the support frame.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, by setting the driving assembly to drive multiple groups of first gears and the adjusting screw rod to rotate simultaneously, the adjusting screw rod drives the movable block, the movable rod and the mounting plate to move, and the mounting plate drives multiple groups of mounting brackets and the limiting rollers to move, which can conveniently and efficiently limit finished products of different sizes, thereby facilitating the improvement of the actual processing quality of the blow molding products. Moreover, all the limiting rollers move and adjust simultaneously, which is convenient for improving the adjustment accuracy of the device. The assembly between the various components of the device is easy to disassemble, which is beneficial to the subsequent maintenance and repair of the device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 is a top view of the overall structure of the present utility model;

[0017] Figure 3 is the present utility model Figure 2 an enlarged view of A.

[0018] In the figure: 1, blow molding bench; 2, blow molding air ring; 3, supporting vertical rod; 4, supporting ring; 5, adjusting screw rod; 6, movable block; 7, movable rod; 8, mounting plate; 9, first gear; 10, fixed block; 11, sliding rod; 12, circular ring; 13, connecting block; 14, toothed ring; 15, servo motor; 16, second gear; 17, support frame; 18, limiting roller; 19, mounting strip; 20, butt plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 to 3 , in the embodiment of the present invention, a blowing device of a film blowing machine includes a blowing table frame 1. A blowing air ring 2 is provided at the center of the blowing table frame 1. A plurality of support vertical rods 3 arranged at equal circumferential intervals around its central axis are installed on the outer ring of the top of the blowing table frame 1. A support ring 4 is provided on the plurality of support vertical rods 3. A plurality of adjusting components corresponding to the support vertical rods 3 one by one are installed on the top of the support ring 4. The adjusting components are connected with auxiliary components for limiting the plastic film. The tops of the plurality of support vertical rods 3 are installed with a driving component for controlling the simultaneous operation of the plurality of adjusting components.

[0021] When the device is in use, the extruding main machine, barrel, etc. connected to the device extrude plastic. The extruded material is blown and formed through the blowing air ring 2. The auxiliary component is used to limit the blown plastic extending upward at the center of the device. The driving component can control the operation of the adjusting component. The adjusting component drives the auxiliary component connected thereto to displace. The auxiliary component moving away from or approaching the central axis of the device can conveniently limit finished products of different sizes efficiently.

[0022] In one embodiment, specifically, the adjusting component includes an adjusting screw rod 5 rotatably installed on the support ring 4. Two movable blocks 6 that can slide reversely on the support vertical rods 3 are threadedly connected to the adjusting screw rod 5. The upper and lower movable blocks 6 are both connected with a mounting plate 8 assembled with the auxiliary component through a movable rod 7. A first gear 9 connected to the driving component is installed at the top of the adjusting screw rod 5. A sliding bracket connected to the mounting plate 8 is provided on the support vertical rod 3.

[0023] The driving component can drive the first gear 9 to rotate. The first gear 9 drives the adjusting screw rod 5 to rotate. The adjusting screw rod 5 drives the movable blocks 6 to slide up and down on the surface of the support vertical rods 3. The movable blocks 6 drive the mounting plate 8 to move along the radial direction of the device through the movable rods 7. The mounting plate 8 drives the auxiliary component to displace.

[0024] Among them, the sliding bracket includes a fixed block 10 welded to the supporting vertical rod 3. The fixed block 10 is rotatably connected to the adjusting screw 5 through a bearing. Two groups of sliding rods 11 slidably connected to the fixed block 10 are welded on the mounting plate 8. The movement of the mounting plate 8 can drive the sliding rods 11 to slide inside the fixed block 10, which can improve the stability of the mounting plate 8 driving the auxiliary member to displace and enhance the supporting strength of the device. On both sides of the movable block 6, movable rods 7 are hinged. On the side of the mounting plate 8 close to the supporting vertical rod 3, a connecting block 13 hinged to the ends of the two groups of movable rods 7 is welded, which can facilitate the installation, disassembly, inspection, etc. between various components.

[0025] On the basis of the above embodiment, specifically, the driving assembly includes a ring 12 welded to the tops of multiple groups of supporting vertical rods 3. The ring 12 rotates with the adjusting screw 5. A toothed ring 14 meshing with multiple groups of first gears 9 is rotatably connected to the outer ring of the ring 12. A servo motor 15 is fixedly installed at the bottom of the ring 12. The output shaft of the servo motor 15 is connected to a second gear 16 meshing with the toothed ring 14. Starting the servo motor 15 drives the second gear 16 to rotate. The second gear 16 drives the toothed ring 14 to rotate on the outer ring of the ring 12, and the ring 12 drives multiple groups of first gears 9 to rotate simultaneously.

[0026] Correspondingly, the auxiliary member includes multiple groups of support frames 17 detachably connected to the mounting plate 8, and the multiple groups of support frames 17 are arranged equidistantly up and down. A limiting roller 18 is rotatably installed inside each group of support frames 17. The limiting roller 18 limits the outer circle of the blown barrel-shaped plastic film. The limiting roller 18 can rotate inside the support frame 17, which can improve the auxiliary limiting effect on the outer circle of the plastic film.

[0027] On the side of the mounting plate 8 away from the supporting vertical rod 3, a mounting strip 19 is integrally formed. On the back of the support frame 17, two docking plates 20 connected to the mounting strip 19 by bolts are welded, which can facilitate the installation, disassembly and replacement of the auxiliary member.

[0028] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A blowing device for a film blowing machine, characterized in that: It includes an inflation stand (1), at the center of the inflation stand (1) there is an inflation air ring (2), and at the outer circle of the top of the inflation stand (1) there are installed multiple groups of support vertical rods (3) arranged equidistantly in a circle around its central axis, and there is a support ring (4) on the multiple groups of support vertical rods (3); At the top of the support ring (4) there are installed multiple groups of adjusting components corresponding one by one to the support vertical rods (3), the adjusting components are connected with an auxiliary part for limiting the plastic film, and at the top ends of the multiple support vertical rods (3) there is installed a driving component for controlling the simultaneous operation of the multiple groups of adjusting components.

2. The inflation device of a blown film machine according to claim 1, characterized in that: The adjusting component includes an adjusting screw rod (5) rotatably installed on the support ring (4), there are two groups of movable blocks (6) threadedly connected to the adjusting screw rod (5) and capable of sliding in opposite directions on the support vertical rod (3), both the upper and lower groups of movable blocks (6) are connected through movable rods (7) to a mounting plate (8) assembled with the auxiliary part, at the top end of the adjusting screw rod (5) there is installed a first gear (9) connected with the driving component, and on the support vertical rod (3) there is a sliding bracket connected with the mounting plate (8).

3. The inflation device of a blown film machine according to claim 2, characterized in that: The sliding bracket includes a fixed block (10) welded to the support vertical rod (3), the fixed block (10) is rotatably connected to the adjusting screw rod (5) through a bearing, and there are two groups of sliding rods (11) welded on the mounting plate (8) and slidably connected to the fixed block (10).

4. The inflation device of a blown film machine according to claim 2, characterized in that: On both sides of the movable block (6) there are articulated movable rods (7), and on the side of the mounting plate (8) close to the support vertical rod (3) there is welded a connecting block (13) articulated to the ends of the two groups of movable rods (7).

5. The inflation device of a blown film machine according to claim 2, characterized in that: The driving component includes a ring (12) welded on the top ends of the multiple groups of support vertical rods (3), the ring (12) is rotatable with the adjusting screw rod (5), on the outer circle of the ring (12) there is rotatably connected a toothed ring (14) meshing with all the multiple groups of first gears (9), at the bottom of the ring (12) there is fixedly installed a servo motor (15), and the output shaft of the servo motor (15) is connected with a second gear (16) meshing with the toothed ring (14).

6. The inflation device of a blown film machine according to claim 2, characterized in that: The auxiliary part includes multiple groups of support frames (17) detachably connected to the mounting plate (8), and the multiple groups of support frames (17) are arranged equidistantly up and down, and inside each group of support frames (17) there is rotatably installed a limiting roller (18).

7. The inflation device of a blown film machine according to claim 6, characterized in that: On the side of the mounting plate (8) away from the support vertical rod (3) there is integrally formed a mounting strip (19), and on the back of the support frame (17) there are two groups of butt plates (20) welded and connected to the mounting strip (19) through bolts.

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