Film blowing size limiting mechanism of film blowing machine

Abstract

The utility model discloses a kind of film blowing machine film blowing size limiting mechanism, including the fixed upper frame and fixed lower frame of being sleeved in the vertical tubular film outside, multiple limiting rollers being supported on the outer wall of film are arranged between fixed upper frame and fixed lower frame, vertical fixed rod is fixedly connected between fixed upper frame and fixed lower frame, vertical movable rod is arranged between fixed upper frame and fixed lower frame on the outside of fixed rod, limiting roller is installed through fork rest, the middle part of fork rest is movably hinged with fixed rod through hinging shaft, the end of fork rest is movably hinged with movable rod through hinging seat;Fixed lower frame is provided with the sliding slot of up and down through in axial direction.This utility model is by limiting roller using fork rest movably hinged installation on fixed rod and movable rod, by height of movable rod is adjusted by moving up and down, the horizontal angle of fork rest can be adjusted, the distance between limiting roller and central film is changed, so different diameter size film can be produced, practical simple and convenient, operation is efficient.

Description

Technical Field

[0001] This utility model relates to the field of blown film technology, specifically a blown film size limiting mechanism for a blown film machine. Background Technology

[0002] A blown film machine is a mechanical device used to manufacture plastic films. It heats and melts plastic particles and then blows them into films. It can produce a variety of types of plastic films, including PE / PP stretch films, EVOH high-barrier co-extruded films, nylon high-barrier sheets, vacuum bags, aluminum foil bags, and various PE shrink films and stretch films. These products are widely used in the packaging of meat products, snack foods, soy products, dairy products, electronic products, PCB circuit boards, textiles, and more.

[0003] After the blown film is blown from bottom to top by the blown film machine, the film is cylindrical. The size of the film is limited by a limiting mechanism around it. Otherwise, the film would expand and deform excessively before cooling to room temperature due to the lack of surrounding restraint. In traditional technology, limiting rollers are used to support the film. The limiting rollers are installed in a fixed position by connecting rods, so that the size of the blown film is fixed. However, with the development of enterprises and the market demand, it is often necessary to produce films of different sizes. The fixed-position limiting rollers cannot support and limit the size of films that are smaller or larger. If the bolts and nuts are removed one by one to adjust the position of the limiting rollers and re-fix them, the operation is time-consuming, laborious and very troublesome, which brings inconvenience to production. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a film blowing machine size limiting mechanism, which solves the problem of inconvenience in adjusting the position of the traditional fixed-position limiting roller on the film blowing machine to adapt to the production needs of films of different sizes.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A blown film size limiting mechanism for a blown film machine includes a fixed upper frame and a fixed lower frame sleeved on the outside of a vertical cylindrical film. Multiple limiting rollers supported on the outer wall of the film are arranged between the fixed upper frame and the fixed lower frame. A vertical fixed rod is fixedly connected between the fixed upper frame and the fixed lower frame. A vertical movable rod is arranged outside the fixed rod between the fixed upper frame and the fixed lower frame. The limiting rollers are mounted via a fork. The middle part of the fork is movably hinged to the fixed rod via a hinge shaft. The end of the fork is movably hinged to the movable rod via a hinge seat.

[0007] The fixed lower frame is provided with a vertically penetrating slide groove along the axial direction. An adjusting screw is vertically inserted into the slide groove. A sliding sleeve that is movably engaged in the slide groove is fixedly sleeved on the surface of the adjusting screw. The adjusting screw is threadedly connected to the movable rod.

[0008] Preferably, the limiting rollers are equidistantly arranged along the axial direction on the film, and the hinge shaft and hinge seat are equidistantly arranged on the fixed rod and the movable rod, respectively.

[0009] Preferably, the limiting rollers are equidistantly arranged in the circumferential direction of the cylindrical film, and at least six sets of limiting rollers are arranged along the circumferential direction of the film.

[0010] Preferably, the sliding sleeve is in the shape of an "I" and is movably engaged with the corresponding sliding groove on the fixed lower frame.

[0011] Preferably, the lower end of the adjusting screw is provided with an internal hexagon socket.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention uses a fork-mounted, hinged installation of the limiting roller on a fixed rod and a movable rod. By adjusting the height of the movable rod by moving it up and down, the horizontal angle of the fork can be adjusted, changing the distance between the limiting roller and the central film. This allows for the production of films of different diameters. It is practical, simple, convenient, and efficient, solving the problem of inconvenience in adjusting the position of the traditional fixed-position limiting roller on blown film machines to adapt to the production needs of films of different sizes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a partial sectional view of the structure at the corresponding position of the adjusting bolt of this utility model;

[0016] Figure 3 This is a top view of the present invention;

[0017] Figure 4 This is a bottom view of the present invention;

[0018] Figure 5 This is a bottom view of a partial structure at the corresponding position of the sliding sleeve of this utility model;

[0019] Figure 6 This is a top view of the limiting roller and the film of this utility model;

[0020] Figure 7 This is a top view of a partial structure of the limiting roller of this utility model.

[0021] In the diagram: 1. Film; 2. Fixed upper frame; 3. Fixed lower frame; 4. Limiting roller; 5. Fixed rod; 6. Movable rod; 7. Fork; 8. Hinge shaft; 9. Hinge seat; 10. Slide groove; 11. Adjusting screw; 12. Sliding sleeve; 13. Socket headstock. Detailed Implementation

[0022] 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.

[0023] like Figure 1-7 As shown, this utility model provides a technical solution: a blown film size limiting mechanism for a blown film machine, including a fixed upper frame 2 and a fixed lower frame 3 sleeved on the outside of a vertical cylindrical film 1. Multiple limiting rollers 4 supported on the outer wall of the film 1 are arranged between the fixed upper frame 2 and the fixed lower frame 3. The limiting rollers 4 are equidistantly arranged on the film 1 along the axial direction. The hinge shaft 8 and the hinge seat 9 are equidistantly arranged on the fixed rod 5 and the movable rod 6, respectively. The limiting rollers 4 are equidistantly arranged in the circumferential direction of the cylindrical film 1, and no less than six sets of limiting rollers 4 are arranged along the circumferential direction of the film 1.

[0024] A vertical fixed rod 5 is fixedly connected between the fixed upper frame 2 and the fixed lower frame 3. A vertical movable rod 6 is provided between the fixed upper frame 2 and the fixed lower frame 3 on the outside of the fixed rod 5. The limiting roller 4 is installed through a fork 7. The middle part of the fork 7 is movably hinged to the fixed rod 5 through a hinge shaft 8. The end of the fork 7 is movably hinged to the movable rod 6 through a hinge seat 9.

[0025] The fixed lower frame 3 is provided with a vertically penetrating slide groove 10 along the axial direction. An adjusting screw 11 is vertically inserted into the slide groove 10. A sliding sleeve 12 is fixedly sleeved on the surface of the adjusting screw 11 and is movably engaged in the slide groove 10. The sliding sleeve 12 is in the shape of an "I" and is movably engaged in the position on the fixed lower frame 3 corresponding to the slide groove 10. The adjusting screw 11 is threadedly connected to the movable rod 6. The lower end of the adjusting screw 11 is provided with an internal hexagon socket head cap 13.

[0026] Working principle:

[0027] The limiting roller 4 is movably hinged to the fixed rod 5 and the movable rod 6 via the fork 7, the hinge shaft 8 and the hinge seat 9. By turning the adjusting screw 11, the roller moves horizontally within the slide groove 10 through the sliding sleeve 12 to meet the horizontal movement requirements of the movable rod 6. This allows the movable rod 6 to be moved up and down to adjust its height position, thereby adjusting the horizontal angle of the fork 7 and changing the distance between the limiting roller 4 and the central film 1, thus adapting to the production of films 1 with different diameters.

[0028] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] 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 blown film size limiting mechanism for a blown film machine, comprising a fixed upper frame (2) and a fixed lower frame (3) sleeved on the outside of a vertical cylindrical film (1), wherein multiple limiting rollers (4) supported on the outer wall of the film (1) are arranged between the fixed upper frame (2) and the fixed lower frame (3), characterized in that: A vertical fixed rod (5) is fixedly connected between the fixed upper frame (2) and the fixed lower frame (3). A vertical movable rod (6) is provided between the fixed upper frame (2) and the fixed lower frame (3) on the outside of the fixed rod (5). The limiting roller (4) is installed through a fork (7). The middle part of the fork (7) is movably hinged to the fixed rod (5) through a hinge shaft (8). The end of the fork (7) is movably hinged to the movable rod (6) through a hinge seat (9). The fixed lower frame (3) is provided with a vertically penetrating slide groove (10) along the axial direction. An adjusting screw (11) is vertically inserted into the slide groove (10). A sliding sleeve (12) that is movably engaged in the slide groove (10) is fixedly sleeved on the surface of the adjusting screw (11). The adjusting screw (11) is threadedly connected to the movable rod (6).

2. The film blowing machine film size limiting mechanism according to claim 1, characterized in that: The limiting roller (4) is equidistantly arranged along the axial direction on the film (1), and the hinge shaft (8) and hinge seat (9) are equidistantly arranged on the fixed rod (5) and the movable rod (6), respectively.

3. The blown film size limiting mechanism for a blown film machine according to claim 1, characterized in that: The limiting rollers (4) are equidistantly arranged in the circumferential direction of the cylindrical film (1), and there are no less than six sets of limiting rollers (4) arranged along the circumferential direction of the film (1).

4. The blown film size limiting mechanism for a blown film machine according to claim 1, characterized in that: The sliding sleeve (12) is in the shape of an "I" and is movably engaged with the corresponding sliding groove (10) on the fixed lower frame (3).

5. The film blowing machine film size limiting mechanism according to claim 1, characterized in that: The lower end of the adjusting screw (11) is provided with an internal hexagon socket (13).

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