Three-layer co-extrusion film blowing device for PE film production

Abstract

The utility model discloses a three-layer co-extrusion film blowing device for PE (polyethylene) film production, which comprises a rack and two bearing seats, the two bearing seats are symmetrically mounted on the rack, a rotating rod is mounted in each bearing seat, one end of each rotating rod is fixedly connected with a rotating roller mounting mechanism, and a rotating roller component is clamped on the two rotating roller mounting mechanisms; the rotating roller assembly comprises a roller body and a roller shaft, the roller body is fixedly connected to the outer surface of the roller shaft, and positioning insertion blocks are welded to the positions, corresponding to the two sides of the roller body, of the surface of the roller shaft. The three-layer co-extrusion film blowing device for PE film production is reasonable in structural design and convenient to use, the rotating rollers are mounted in a clamping mode, the rotating rollers can be quickly dismounted, cleaned or replaced when being dirty or damaged, the using effect of the rotating rollers is effectively improved, the service life of the rotating rollers is effectively prolonged, the mounting stability of the rotating rollers is good, and the service life of the rotating rollers is prolonged. And film blowing processing production of the PE film is facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of PE film production equipment, specifically a three-layer co-extrusion blown film device for PE film production. Background Technology

[0002] The three-layer co-extrusion blown film machine is a type of equipment that melts plastic granules and processes them into plastic films through blown film equipment. The three-layer co-extrusion blown film machine has the advantages of higher output, better plasticization of products, low energy consumption, and simple operation. It completely solves problems such as film fringe and uneven winding, thus raising the product quality to a new level.

[0003] A search revealed a patent document, CN202210204178.2, which discloses "a three-layer co-extrusion blown film machine with self-adjustable spacing of limiting components." The machine includes a base, a connecting frame fixedly connected to the top of the base, and a first rotating roller rotatably connected inside the connecting block. This three-layer co-extrusion blown film machine with self-adjustable spacing of limiting components adjusts the position of the cutting shears according to the thickness of the film body. By turning the adjusting rod, the position of the cutting shears is adjusted to ensure a smooth cut surface without burrs when cutting the film body. In actual use, errors may occur. At this time, by moving the telescopic rod, the position of the cutting shears can be finely adjusted, ensuring that the device can guarantee a neat cut surface of the film body.

[0004] The multiple rollers in this patent are difficult to disassemble, clean, or replace when they become dirty or damaged after long-term use, which reduces their performance and service life. To address this, we propose a three-layer co-extrusion blown film device for PE film production to solve the problems mentioned in the background. Utility Model Content

[0005] The purpose of this invention is to provide a three-layer co-extrusion blown film device for PE film production, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a three-layer co-extrusion blown film device for PE film production, comprising a three-layer co-extrusion blown film device frame and bearing seats, wherein there are two bearing seats and they are symmetrically installed on the three-layer co-extrusion blown film device frame, a rotating rod is installed inside the bearing seat, one end of the rotating rod is fixedly connected to a rotating roller mounting mechanism, and rotating roller assemblies are snapped onto the two rotating roller mounting mechanisms;

[0007] The roller assembly includes a roller body and a roller shaft. The roller body is fixedly connected to the outer surface of the roller shaft, and positioning blocks are welded to the surface of the roller shaft and to both sides of the roller body.

[0008] The roller mounting mechanism includes a rotating seat, which is fixedly connected to one end of the rotating rod. The top of the rotating seat on the side away from the bearing seat is provided with a U-shaped groove for the roller shaft to be installed. The rotating seat is provided with a positioning hole that matches the positioning block at the arc surface corresponding to the U-shaped groove. A locking component for fixing the roller shaft is also fixedly installed on the outside of the rotating seat.

[0009] Furthermore, the locking assembly includes a fixing frame, which is welded to one side of the rotating seat. A screw is threaded onto the fixing frame, and a circular rotating plate is fixedly connected to the end of the screw located inside the fixing frame. A transverse sliding sleeve is movably connected to the circular rotating plate, and a limiting pressure plate is fixedly connected to the transverse sliding sleeve near the rotating seat and above the corresponding roller shaft.

[0010] Furthermore, a guide slider is fixedly connected to the outer surface of the transverse sleeve, and a guide groove adapted to the guide slider is provided on the inner wall of the fixing frame.

[0011] Furthermore, each side of the rotating seat has an insertion port that communicates with the U-shaped groove at the position corresponding to the limiting pressure plate, and one end of the limiting pressure plate passes through the two insertion ports in sequence.

[0012] Furthermore, a limiting component for fixing is fixedly installed on one side of the rotating seat corresponding to the end of the limiting pressure plate. The limiting component includes a fixed plate, a guide rod, and a movable plate. The guide rod is fixedly connected to the surface of the fixed plate, and the movable plate is slidably connected to the surface of the guide rod along the axial direction. A thrust spring is also sleeved on the surface of the guide rod. The two ends of the thrust spring are fixedly connected to the fixed plate and the movable plate, respectively. A limiting locking rod is fixedly connected to one side of the movable plate corresponding to the limiting pressure plate.

[0013] Furthermore, the limiting pressure plate is provided with a limiting lock hole for use with the limiting lock rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention mounts the roller assembly inside two rotating seats, cooperating with the rotating rod and bearing seat to achieve rotation. When the roller body needs to be disassembled for cleaning or replacement, the guide rod limits the movement, pressing the movable plate towards the fixed plate, compressing the thrust spring and disengaging the limit locking rod from the limit locking hole. At this point, the screw can be rotated, and through the threaded connection with the fixed frame, the circular rotating plate can be rotated away from the rotating seats. Under the limiting of the guide slider and guide groove, the rotating circular rotating plate can drive the lateral movement. The sleeve and limiting pressure plate are moved away from the rotating seat and pass through the two insertion holes, disengaging from the pressing with the roller shaft. The roller shaft can then be removed from the U-shaped groove. Similarly, during installation, the above steps are reversed. This three-layer co-extrusion blown film device for PE film production has a reasonable structural design and is easy to use. It uses a snap-fit ​​method to install the rotating roller, which can be quickly removed, cleaned, or replaced when it is dirty or damaged, effectively improving its performance and service life. Furthermore, it has good installation stability for the rotating roller, which is beneficial for the blown film processing of PE film. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the roller assembly of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the roller mounting mechanism of this utility model;

[0019] Figure 4 This is a cross-sectional view of the connection structure between the transverse sliding sleeve and the limiting pressure plate of this utility model;

[0020] Figure 5 This is a cross-sectional view of the connection structure between the circular rotating plate and the transverse sliding sleeve of this utility model;

[0021] Figure 6 This is a three-dimensional structural diagram of the rotating seat and limiting component of this utility model.

[0022] In the diagram: 1. Three-layer co-extrusion blown film unit frame; 2. Bearing seat; 3. Rotary rod; 4. Roller mounting mechanism; 41. Rotary seat; 42. U-shaped groove; 43. Positioning insertion hole; 44. Locking assembly; 441. Fixing frame; 442. Screw; 443. Circular rotating plate; 444. Horizontal sliding sleeve; 445. Limiting pressure plate; 446. Guide slider; 447. Guide groove; 448. Limiting locking hole; 45. Insertion port; 46. Limiting assembly; 461. Fixing plate; 462. Guide rod; 463. Movable plate; 464. Thrust spring; 465. Limiting locking rod; 5. Roller assembly; 51. Roller body; 52. Roller shaft; 53. Positioning insertion block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6 A three-layer co-extrusion blown film device for PE film production includes a three-layer co-extrusion blown film device frame 1 and bearing seats 2. There are two bearing seats 2, which are symmetrically installed on the three-layer co-extrusion blown film device frame 1. Other components of the blown film equipment are also installed on the three-layer co-extrusion blown film device frame 1. This is mature prior art, which will not be described in detail here, nor is it fully shown in the accompanying drawings. A rotating rod 3 is installed in the bearing seat 2. One end of the rotating rod 3 is fixedly connected to a rotating roller mounting mechanism 4. Rotating roller assemblies 5 are snapped onto the two rotating roller mounting mechanisms 4.

[0025] The roller assembly 5 includes a roller body 51 and a roller shaft 52. The roller body 51 is fixedly connected to the outer surface of the roller shaft 52. Positioning blocks 53 are welded to the surface of the roller shaft 52 and to both sides of the roller body 51.

[0026] The roller mounting mechanism 4 includes a rotating seat 41, which is fixedly connected to one end of the rotating rod 3. A U-shaped groove 42 for mounting the roller shaft 52 is provided on the top of the rotating seat 41 on the side away from the bearing seat 2. A positioning hole 43, matching the positioning block 53, is provided on the arc surface of the rotating seat 41 corresponding to the U-shaped groove 42. After the roller shaft 52 is inserted into the U-shaped groove 42, its surface is pressed tightly against the arc surface of the U-shaped groove 42, and the positioning block 53 is engaged in the positioning hole 43, ensuring that the rotating seat 41 rotates smoothly under the connection of the rotating rod 3 and the bearing seat 2. It can drive the roller shaft 52 and roller body 51 to rotate synchronously. The outer side of the rotating seat 41 is also fixedly installed with a locking component 44 for fixing the roller shaft 52. After all components are installed, according to the relative weight of the components in each direction of the rotating seat 41, counterweights of different weights can be installed on the corresponding sides to ensure that the rotating seat 41 will not have uneven rotation speed due to excessive gravity on one side during rotation. That is, after installing the counterweights, the overall center of gravity of the rotating seat 41 should be on the axis of the rotating rod 3, which can effectively ensure the stability of the rotation of the roller assembly 5.

[0027] The locking assembly 44 includes a fixed frame 441, which is welded to one side of the rotating seat 41. A screw 442 is threaded onto the fixed frame 441. A circular rotating plate 443 is fixedly connected to the end of the screw 442 located inside the fixed frame 441. A transverse sliding sleeve 444 is movably connected to the circular rotating plate 443. The transverse sliding sleeve 444 is fixedly connected to the limiting pressure plate 445 on the side close to the rotating seat 41 and corresponding to the top of the roller 52. A guide slider 446 is fixedly connected to the outer surface of the transverse sliding sleeve 444. A guide groove 447 adapted to the guide slider 446 is provided on the inner wall of the fixed frame 441.

[0028] Both sides of the rotating seat 41 are provided with insertion ports 45 that communicate with the U-shaped groove 42 at the positions corresponding to the limiting pressure plates 445. One end of the limiting pressure plate 445 passes through the two insertion ports 45 in sequence. After the roller shaft 52 is inserted into the U-shaped groove 42, the screw 442 can be rotated. Through the threaded connection between the screw and the fixed frame 441, the circular rotating plate 443 can be driven to rotate and move to one side of the rotating seat 41. Under the limiting of the guide slider 446 and the guide groove 447, the circular rotating plate 443 pushes the transverse sleeve 444 and the limiting pressure plate 445 to move to one side of the rotating seat 41 and pass through the two insertion ports 45, thereby tightening and limiting the roller shaft 52 from the outside, ensuring that the roller shaft 52 will not come out of the U-shaped groove 42 during rotation.

[0029] A limiting component 46 is fixedly installed on one side of the rotating seat 41 corresponding to the end of the limiting pressure plate 445 for fixing. The limiting component 46 includes a fixed plate 461, a guide rod 462, and a movable plate 463. The guide rod 462 is fixedly connected to the surface of the fixed plate 461, and the movable plate 463 is slidably connected to the surface of the guide rod 462 along the axial direction. A thrust spring 464 is also sleeved on the surface of the guide rod 462. The two ends of the thrust spring 464 are fixedly connected to the fixed plate 461 and the movable plate 463 respectively. A limiting locking rod 465 is fixedly connected to one side of the movable plate 463 corresponding to the limiting pressure plate 445. A locking rod 465 is provided on the limiting pressure plate 445. The limiting locking hole 448 is used in conjunction with the limiting locking rod 465. When the limiting locking rod 465 is movably inserted into the limiting locking hole 448, it can achieve lateral limiting of the limiting pressure plate 445. This can prevent the screw 442 from rotating freely due to vibration during the rotation of the rotating seat 41 or during the operation of the equipment, which would cause the limiting pressure plate 445 to loosen and shift. This can greatly improve the stability of the limiting pressure plate 445 in tightening and limiting the roller shaft 52. A baffle is also fixedly connected to the end of the guide rod 462 away from the fixed plate 461, which plays a limiting role in the movable plate 463 and can prevent the movable plate 463 from falling off the guide rod 462 during the movement.

[0030] This three-layer co-extrusion blown film device for PE film production has a reasonable structural design and is easy to use. It uses a snap-fit ​​method to install the rollers, which can be quickly removed, cleaned, or replaced when they are dirty or damaged, effectively improving the performance and service life. In addition, the installation of the rollers has good stability, which is conducive to the blown film processing of PE film.

[0031] In use, the roller assembly 5 is installed inside the two rotating seats 41, and rotates in conjunction with the rotating rod 3 and bearing seat 2. When the roller body 51 needs to be disassembled for cleaning or replacement, the movable plate 463 is pressed towards the fixed plate 461 by the limit of the guide rod 462, so that the thrust spring 464 is compressed and the limit locking rod 465 is disengaged from the limit locking hole 448. At this time, the screw 442 can be rotated. Through the threaded connection with the fixed frame 441, the circular rotating plate 443 can be rotated and moved away from the rotating seat 41. Under the limit of the guide slider 446 and the guide groove 447, the rotating circular rotating plate 443 can drive the transverse sleeve 444 and the limit pressure plate 445 to move away from the rotating seat 41 and pass out through the two insertion holes 45, disengaging from the pressing with the roller shaft 52. The roller shaft 52 can then be removed from the U-shaped groove 42. Similarly, during installation, the above steps are simply reversed.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-layer co-extrusion blown film device for PE film production, comprising a three-layer co-extrusion blown film device frame (1) and a bearing seat (2), characterized in that: The number of bearing seats (2) is two and they are symmetrically installed on the frame (1) of the three-layer co-extrusion blown film device. A rotating rod (3) is installed inside the bearing seat (2). One end of the rotating rod (3) is fixedly connected to a rotating roller mounting mechanism (4). A rotating roller assembly (5) is snapped onto the two rotating roller mounting mechanisms (4). The roller assembly (5) includes a roller body (51) and a roller shaft (52). The roller body (51) is fixedly connected to the outer surface of the roller shaft (52). Positioning blocks (53) are welded to the surface of the roller shaft (52) and to both sides of the roller body (51). The roller mounting mechanism (4) includes a rotating seat (41), which is fixedly connected to one end of the rotating rod (3). The top of the rotating seat (41) away from the bearing seat (2) is provided with a U-shaped groove (42) for the roller shaft (52) to be installed. The rotating seat (41) is provided with a positioning hole (43) that matches the positioning block (53) at the arc surface corresponding to the U-shaped groove (42). A locking assembly (44) for fixing the roller shaft (52) is also fixedly installed on the outside of the rotating seat (41).

2. The three-layer co-extrusion blown film device for PE film production according to claim 1, characterized in that: The locking assembly (44) includes a fixing frame (441) welded to one side of the rotating seat (41). A screw (442) is threaded onto the fixing frame (441). A circular rotating plate (443) is fixedly connected to the end of the screw (442) located inside the fixing frame (441). A transverse sliding sleeve (444) is movably connected onto the circular rotating plate (443). The transverse sliding sleeve (444) is fixedly connected to a limiting pressure plate (445) on the side close to the rotating seat (41) and above the corresponding roller shaft (52).

3. The three-layer co-extrusion blown film device for PE film production according to claim 2, characterized in that: The outer surface of the transverse sleeve (444) is fixedly connected to a guide slider (446), and the inner wall of the fixing frame (441) is provided with a guide groove (447) that is compatible with the guide slider (446).

4. The three-layer co-extrusion blown film device for PE film production according to claim 3, characterized in that: The rotating seat (41) has through-holes (45) on both sides corresponding to the limiting pressure plate (445) that communicate with the U-shaped groove (42). One end of the limiting pressure plate (445) passes through the two through-holes (45) in sequence.

5. The three-layer co-extrusion blown film device for PE film production according to claim 4, characterized in that: The rotating seat (41) is also fixedly installed with a limiting component (46) for fixing on one side of the end of the limiting pressure plate (445). The limiting component (46) includes a fixed plate (461), a guide rod (462) and a movable plate (463). The guide rod (462) is fixedly connected to the surface of the fixed plate (461). The movable plate (463) is slidably connected to the surface of the guide rod (462) along the axial direction. A thrust spring (464) is also sleeved on the surface of the guide rod (462). The two ends of the thrust spring (464) are fixedly connected to the fixed plate (461) and the movable plate (463) respectively. A limiting locking rod (465) is fixedly connected to one side of the movable plate (463) corresponding to the limiting pressure plate (445).

6. The three-layer co-extrusion blown film device for PE film production according to claim 5, characterized in that: The limiting pressure plate (445) is provided with a limiting lock hole (448) for use with the limiting lock rod (465).

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