Die head structure of PE film blowing machine

Abstract

The utility model discloses a PE (Poly Ethylene) film blowing machine die head structure, which relates to the technical field of film blowing machines, and comprises a film blowing machine die head, an air distribution structure is arranged at the periphery of a die orifice of the film blowing machine die head around a film bubble, the air distribution structure comprises an air bin arranged at the top of the die orifice, an air inlet pipe communicated with a cavity of the air bin is arranged on the outer ring wall surface of the air bin along the tangential direction, and the air inlet pipe is communicated with the cavity of the air bin. And tuyeres which are distributed around the film bubble by a circle and are communicated with the cavity of the air bin are uniformly distributed on the inner ring wall surface of the air bin. The air bin is arranged to distribute air, so that air can be blown to clean the position of the film blowing machine die head in advance, air can be discharged to form a relatively clean area surrounding film bubbles when the film blowing machine die head blows a film, the exposure time of the film bubbles is shortened, dust is prevented from being settled and adsorbed on the surfaces of the film bubbles which are just output and are not dry, the dust prevention and removal effects are achieved, and the service life of the film blowing machine is prolonged. And the effect of accelerating cooling and shaping on film bubbles just output by the die orifice is achieved, dust adhesion is reduced, and the high transparency uniformity of the film is improved.

Description

Technical Field

[0001] This utility model relates to the field of blown film machine technology, specifically to a die head structure for a PE blown film machine. Background Technology

[0002] The top-traction blown film extrusion machine is a plastic film processing device. It is relatively large in size, and its overall height, combined with the traction mechanism, makes it difficult to create a closed operating area. Therefore, factories cannot guarantee the cleanliness of the environment around the equipment during plastic film production. Consequently, the air around the blown film extrusion machine inevitably contains some lint, dust, and other substances. The film bubble freshly blown from the die head is not fully cooled and easily absorbs impurities from the surrounding air, thus affecting the quality of the film bubble. To meet customers' demands for high transparency and uniformity of the film, we have designed and improved this, proposing a new die head structure for a PE blown film extrusion machine. Utility Model Content

[0003] The purpose of this invention is to provide a die head structure for a PE blown film machine, which solves the problem that the blown film bubble is not completely cooled when it is blown out, and easily adsorbs impurities in the surrounding air, affecting the quality of the blown film bubble.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a PE blown film machine die head structure, including a blown film machine die head, wherein the die opening of the blown film machine die head is provided with an air distribution structure around the periphery of the film bubble, the air distribution structure includes an air chamber set at the top of the die opening, the air chamber is annular, the outer ring wall of the air chamber is provided with an air inlet pipe connected to the air chamber chamber along the tangential direction, the inner ring wall of the air chamber is evenly distributed with air nozzles that surround the film bubble and are connected to the air chamber chamber, the air nozzles discharge air in a direction parallel to the outer wall of the film bubble, the air chamber chamber is provided with an annular dense air mesh distributed along the vertical direction with the same center as the air chamber, the chamber of the air chamber is divided by the annular dense air mesh to form an inner ring cavity facing the air nozzles and an outer ring cavity facing the air inlet pipe.

[0005] Preferably, the air inlet pipe is equipped with an air valve.

[0006] Preferably, the side of the annular dense air mesh facing the outer annular cavity is provided with air guide plates that surround the annular dense air mesh and are distributed vertically.

[0007] Preferably, the nozzle is L-shaped.

[0008] Preferably, the air chamber includes an inner ring plate and an outer ring plate fixed to the mold opening, and a cover plate fixed to the top of the inner ring plate and the outer ring plate. The inner ring plate extends upward along the height direction, the air inlet pipe is connected to the outer ring plate, and the air nozzle is connected to the inner ring plate.

[0009] This utility model has the following beneficial effects:

[0010] This invention, by setting up an air chamber, can pre-clean the die head of the blown film machine. When the blown film is being blown, the air outlet at the die head can form a relatively clean area surrounding the film bubble, reducing the exposure time of the film bubble and preventing dust from settling and adhering to the surface of the freshly output, undried film bubble. This not only plays a role in preventing and removing dust, but also accelerates the cooling and shaping of the film bubble that has just been output from the die, reducing dust adhesion and improving the high transparency and uniformity of the film. Attached Figure Description

[0011] Figure 1 This is a perspective view of the present utility model;

[0012] Figure 2 This is a schematic diagram of the internal structure of the air chamber of this utility model;

[0013] Figure 3 This is a top view of the internal structure of the wind tunnel of this utility model.

[0014] In the diagram: 1. Film blowing machine die head; 2. Film bubble; 31. Air chamber; 311. Inner ring plate; 312. Outer ring plate; 313. Cover plate; 32. Air inlet pipe; 321. Air valve; 33. Air nozzle; 34. Annular air-tight mesh; 341. Air guide plate. Detailed Implementation

[0015] 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.

[0016] like Figure 1-3 As shown, this utility model provides a technical solution: a PE blown film machine die head structure, including a blown film machine die head 1. The die opening of the blown film machine die head 1 is provided with an air distribution structure around the outer periphery of the film bubble 2. The air distribution structure includes an air chamber 31 set at the top of the die opening. The air chamber 31 is circular. The outer ring wall of the air chamber 31 is provided with an air inlet pipe 32 connected to the chamber of the air chamber 31 along the tangential direction. The air inlet pipe 32 is provided with an air valve 321 to control the air intake. The inner ring wall of the air chamber 31 is evenly distributed with air nozzles 33 that surround the film bubble 2 and are connected to the chamber of the air chamber 31. The air nozzles 33 are L-shaped and exhaust air in a direction parallel to the outer wall of the film bubble 2.

[0017] The chamber of the air chamber 31 is provided with a vertically arranged annular dense air mesh 34 with the same center as the air chamber 31. The side of the annular dense air mesh 34 facing the outer annular cavity is provided with a ring of vertically arranged around the annular dense air mesh 34. The chamber of the air chamber 31 is divided by the annular dense air mesh 34 to form an inner annular cavity facing the air nozzle 33 and an outer annular cavity facing the air inlet pipe 32.

[0018] The air chamber 31 includes an inner ring plate 311 and an outer ring plate 312 fixed to the mold opening, and a cover plate 313 sealed on the top of the inner ring plate 311 and the outer ring plate 312. The inner ring plate 311 extends upward along the height direction to surround the clean area. The air inlet pipe 32 is connected to the outer ring plate 312, and the air nozzle 33 is connected to the inner ring plate 311.

[0019] The air distribution in the air chamber 31 can pre-clean the die head 1 of the blown film machine. When the die head 1 blows the film, the air outlet forms a relatively clean area around the film bubble 2, reducing the exposure time of the film bubble 2. When the air chamber 31 distributes air, the air entering tangentially from the air inlet pipe 32 flows in a ring along the outer ring cavity of the air chamber 31. The air is evenly dispersed into the inner ring cavity by the annular dense air mesh 34 and the air guide plate 341. The air entering the inner ring cavity is blown upward from the evenly distributed air nozzles 33 along the direction parallel to the outer wall of the film bubble 2. The air is evenly discharged around the outer ring of the film bubble 2, forming a relatively clean area. This prevents dust from settling and adsorbing on the surface of the freshly output, undried film bubble 2. It not only plays a role in dust prevention and removal, but also accelerates the cooling and shaping of the film bubble 2 that has just been output from the die, reduces dust adhesion, and improves the high transparency and uniformity of the film.

[0020] 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.

[0021] 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 PE blown film machine die head structure, comprising a blown film machine die head (1), characterized in that: The blown film machine die head (1) has an air distribution structure around the periphery of the film bubble (2). The air distribution structure includes an air chamber (31) set at the top of the die opening. The air chamber (31) is circular. The outer ring wall of the air chamber (31) is provided with an air inlet pipe (32) connected to the chamber of the air chamber (31) along the tangential direction. The inner ring wall of the air chamber (31) is evenly distributed with air nozzles (33) that surround the film bubble (2) and are connected to the chamber of the air chamber (31). The air nozzles (33) emit air in a direction parallel to the outer wall of the film bubble (2). The chamber of the air chamber (31) is provided with an annular dense air mesh (34) distributed along the vertical direction with the same center as the air chamber (31). The chamber of the air chamber (31) is divided by the annular dense air mesh (34) to form an inner ring cavity facing the air nozzle (33) and an outer ring cavity facing the air inlet pipe (32).

2. The die head structure for a PE blown film machine according to claim 1, characterized in that: The air inlet pipe (32) is equipped with an air valve (321).

3. The die head structure for a PE blown film machine according to claim 1, characterized in that: The annular dense air mesh (34) has a guide plate (341) that surrounds the annular dense air mesh (34) and is vertically distributed on the side facing the outer annular cavity.

4. The die head structure of a PE blown film machine according to claim 1, characterized in that: The nozzle (33) is L-shaped.

5. The die head structure for a PE blown film machine according to claim 1, characterized in that: The air chamber (31) includes an inner ring plate (311) and an outer ring plate (312) fixed to the mold opening, and a cover plate (313) sealed on the top of the inner ring plate (311) and the outer ring plate (312). The inner ring plate (311) extends upward along the height direction, the air inlet pipe (32) is connected to the outer ring plate (312), and the air nozzle (33) is connected to the inner ring plate (311).

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