Cooling mechanism of plastic film blowing machine

Abstract

The utility model discloses a cooling mechanism of a plastic film blowing machine. The cooling mechanism comprises a film blowing mold, the annular air deflector is arranged above the outer side of a film extruded by the film blowing die, and a cold air channel is formed between the inner wall of the annular air deflector and the film; the annular air cavity is arranged between the film blowing mold and the annular air deflector; the cold air assembly is arranged on the annular air guide plate and communicates with the annular air cavity. The utility model relates to the technical field of film blowing machines, the cold air assembly is started to refrigerate external air, cooled air enters the annular air cavity and enters the cold air channel through the annular air uniformizing plate to cool a film, and the film is cooled by the air uniformizing plate. The damage to the co-extrusion film caused by cooling air which is vertically blown to the film is avoided, and the film blowing quality is ensured; the cold air assembly is arranged on the annular air guide plate, the cold air assembly exchanges heat with the annular air guide plate while conducting refrigeration, compensation cooling is conducted on the blown film through the annular air guide plate, and the cooling effect on the co-extrusion film is guaranteed.

Description

Technical Field

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

[0002] In the process of multi-layer co-extrusion film, multiple plastic raw materials are mixed and melted, and then extruded and blown into film. During the blown film process, the mold and raw materials must be kept at a certain temperature to make the raw materials plastic. After the co-extruded film is blown out, it needs to be cooled down quickly so that it can be quickly formed and has a certain strength, making it easy to stretch and roll up.

[0003] Currently, the existing blown film machine mold is circular. In order to cool down quickly, a circular fan is installed at the mold outlet to cool the newly formed co-extruded film through air flow. However, the newly formed co-extruded film still has a certain temperature and weak strength. The cooling air blown vertically towards the film will damage the co-extruded film and affect the blown film quality. Therefore, a cooling mechanism for a plastic blown film machine is provided. Utility Model Content

[0004] The purpose of this invention is to provide a cooling mechanism for a plastic blown film machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cooling mechanism for a plastic blown film machine, comprising:

[0006] blown film mold;

[0007] An annular air guide plate is disposed above the outer side of the film extruded by the blown film die, and a cold air channel is formed between the inner wall of the annular air guide plate and the film.

[0008] An annular air cavity is disposed between the blown film mold and the annular air guide plate;

[0009] A cooling air assembly is disposed on the annular air guide plate and communicates with the annular air cavity;

[0010] An annular air distribution plate is positioned above the air outlet of the annular air cavity.

[0011] Preferably, the cooling air assembly includes a housing disposed on the outer wall of the annular air guide plate, a water chiller is provided on one side of the blown film mold, the water chiller is provided with a serpentine cooling pipe extending into the inner side of the housing, an air inlet fan is provided on one side of the housing, and an air inlet pipe communicating with the annular air cavity is provided on the other side of the housing.

[0012] Preferably, the annular air guide plate is made of copper, and the inner wall of the serpentine cooling pipe is attached to the outer wall of the annular air guide plate.

[0013] Preferably, the annular air cavity includes an annular cavity disposed between the blown film mold and the annular air guide plate. The upper end of the annular cavity is provided with an annular groove. The inner wall of the annular groove is provided with a plurality of evenly distributed air nozzles. The annular air distribution plate is disposed at the opening of the annular groove.

[0014] Preferably, the air outlet of the annular air distribution plate is arranged parallel to the bottom of the annular air guide plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the cooling mechanism of the plastic blown film machine of this utility model activates the cold air component to cool the outside air when the blown film is blown out of the blown film mold. The cooled air enters the annular air cavity and enters the cold air channel through the annular air distribution plate to cool the film. This avoids the damage to the co-extruded film caused by the cooling air blown vertically towards the film, thus ensuring the quality of the blown film.

[0016] By placing the cold air assembly on the annular air guide plate, the cold air assembly cools the film while exchanging heat with the annular air guide plate. The annular air guide plate compensates for the cooling of the blown film, ensuring the cooling effect on the co-extruded film. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main cross-sectional structure of this utility model;

[0018] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A.

[0019] In the diagram: 1. Blown film mold; 2. Annular air guide plate; 3. Annular air cavity; 3-1. Annular cavity; 3-2. Annular groove; 3-3. Air nozzle; 4. Cooling air assembly; 4-1. Housing; 4-2. Water chiller; 4-3. Serpentine cooling pipe; 4-4. Air inlet fan; 4-5. Air inlet pipe; 5. Annular air distribution 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. 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.

[0021] Please see Figure 1-2This utility model provides a technical solution: a cooling mechanism for a plastic blown film machine, comprising: a blown film mold 1; an annular air guide plate 2 disposed above the outer side of the blown film mold 1 extruding the film, with a cold air channel formed between the inner wall of the annular air guide plate 2 and the film; an annular air cavity 3 disposed between the blown film mold 1 and the annular air guide plate 2; a cold air assembly 4 disposed on the annular air guide plate 2 and communicating with the annular air cavity 3; and an annular air distribution plate 5 disposed above the air outlet of the annular air cavity 3. When the blown film mold blows out the film, the cold air assembly 4 is activated to cool the external air. The cooled air enters the annular air cavity 3 and passes through the annular air distribution plate 5 into the cold air channel to cool the film, thus avoiding damage to the co-extruded film caused by the cooling air blowing vertically towards the film and ensuring the quality of the blown film. Because the cold air assembly 4 is disposed on the annular air guide plate 2, the cold air assembly 4 exchanges heat with the annular air guide plate 2 while cooling the film, and the annular air guide plate 2 compensates for the cooling of the blown film, ensuring the cooling effect on the co-extruded film.

[0022] Specifically, the cooling air assembly 4 includes a housing 4-1 disposed on the outer wall of the annular air guide plate 2, a water chiller 4-2 disposed on one side of the blown film mold 1, a serpentine cooling pipe 4-3 disposed on the water chiller 4-2 extending into the inner side of the housing 4-1, an air inlet fan 4-4 disposed on one side of the housing 4-1, and an air inlet pipe 4-5 communicating with the annular air cavity 3 disposed on the other side of the housing 4-1. In use, the water chiller 4-2 is started to cool the serpentine cooling pipe 4-3, and the air inlet fan 4-4 is started to allow external air to enter the housing 4-1 and cool the air entering the housing 4-1 through the serpentine cooling pipe 4-3. The cooled air then enters the annular air cavity 3 through the air inlet pipe 4-5, thus realizing that the external air is formed into cooling air by the cooling air assembly 4 and enters the annular air cavity 3.

[0023] Specifically, the annular air guide plate 2 is made of copper, and the inner sidewall of the serpentine cooling pipe 4-3 is attached to the outer wall of the annular air guide plate 2. When the water chiller 4-2 is started, the serpentine cooling pipe 4-3 is cooled. Since the annular air guide plate 2 is made of copper and is attached to the annular air guide plate 2, the serpentine cooling pipe 4-3 exchanges heat with the film through the annular air guide plate 2. The annular air guide plate 2 compensates for the cooling of the blown film, ensuring the cooling effect on the co-extruded film.

[0024] Specifically, the annular air cavity 3 includes an annular cavity 3-1 disposed between the blown film mold 1 and the annular air guide plate 2. The upper end of the annular cavity 3-1 is provided with an annular groove 3-2. The inner wall of the annular groove 3-2 is provided with a number of evenly distributed air nozzles 3-3. The annular air distribution plate 5 is disposed at the opening of the annular groove 3-2. When the cooling air enters the annular cavity 3-1, it is sprayed out through the number of air nozzles 3-3, ensuring the uniformity of the air outlet of the annular cavity 3-1. At the same time, the cooling air sprayed out by the air nozzles 3-3 disposed on the inner wall of the annular groove 3-2 is dispersed by impact with the inner wall opposite to the air nozzles 3-3, avoiding excessive local wind force and damage to the film after passing through the annular air distribution plate 5.

[0025] Specifically, the air outlet of the annular air distribution plate 5 is set parallel to the bottom of the annular air guide plate 2. When the cooling air in the annular air cavity 3 is discharged, the cooling air is blown out along the air outlet of the annular air distribution plate 5. The blown-out cold air enters the cooling channel along the inner wall of the annular guide plate 2, which effectively avoids the cooling air blowing vertically towards the film from damaging the co-extruded film and ensures the quality of the blown film.

[0026] Working principle: When this utility model is working, during the cooling process, the cold air assembly 4 is activated to cool the outside air. The cooled air enters the annular air cavity 3 and passes through the annular air distribution plate 5 into the cold air channel to cool the film. At the same time, while the cold air assembly 4 is cooling, it exchanges heat with the annular air guide plate 2 to compensate for the cooling of the blown film, thus ensuring the cooling effect on the co-extruded film.

[0027] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0029] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling mechanism for a plastic blown film machine, characterized in that, include: blown film mold (1); An annular air guide plate (2) is disposed above the outer side of the film extruded by the blown film mold (1), and a cold air channel is formed between the inner wall of the annular air guide plate (2) and the film. An annular air cavity (3) is disposed between the blown film mold (1) and the annular air guide plate (2); The cold air assembly (4) is disposed on the annular air guide plate (2) and is connected to the annular air cavity (3); An annular air distribution plate (5) is disposed above the air outlet of the annular air cavity (3).

2. The cooling mechanism of a plastic blown film machine according to claim 1, characterized in that: The cooling air assembly (4) includes a housing (4-1) disposed on the outer wall of the annular air guide plate (2), a water chiller (4-2) is provided on one side of the blown film mold (1), a serpentine cooling pipe (4-3) extending into the inner side of the housing (4-1) is provided on the water chiller (4-2), an air inlet fan (4-4) is provided on one side of the housing (4-1), and an air inlet pipe (4-5) communicating with the annular air cavity (3) is provided on the other side of the housing (4-1).

3. The cooling mechanism of a plastic blown film machine according to claim 2, characterized in that: The annular air guide plate (2) is made of copper, and the inner wall of the serpentine cooling pipe (4-3) is attached to the outer wall of the annular air guide plate (2).

4. The cooling mechanism of a plastic blown film machine according to claim 1, characterized in that: The annular air cavity (3) includes an annular cavity (3-1) disposed between the blown film mold (1) and the annular air guide plate (2). The upper end of the annular cavity (3-1) is provided with an annular groove (3-2). The inner wall of the annular groove (3-2) is provided with a plurality of evenly distributed air nozzles (3-3). The annular air distribution plate (5) is disposed at the opening of the annular groove (3-2).

5. The cooling mechanism of a plastic blown film machine according to claim 1, characterized in that: The air outlet of the annular air distribution plate (5) is arranged parallel to the bottom of the annular air guide plate (2).

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