Cooling mechanism for film blowing machine

Abstract

The utility model discloses a cooling mechanism for a film blowing machine, which comprises a film blowing machine body provided with a film head, a cooling-water machine arranged on one side of the film blowing machine body, an annular water tank arranged on the film blowing machine body, an annular cavity arranged on the film blowing machine body, an upper water pipe arranged between the cooling-water machine and the annular cavity, and a lower water pipe arranged in the annular cavity and extending into the annular water tank. A water return pipe is arranged between the annular water tank and the cooling-water machine; a circulating pump is arranged on the water return pipe; an annular cavity is formed in the film blowing machine body, an annular air cavity is formed in the annular cavity, an air blower is arranged on the film blowing machine body, an air inlet pipe is arranged between the air blower and the annular air cavity, a plurality of air nozzles are arranged at the bottom of the annular cavity, and heat exchange pipes are arranged between the annular air cavity and the air nozzles. The temperature near the outlet of the film head is reduced through cooling water in the annular water tank; and air in the annular air cavity is cooled through the heat exchange pipe and is blown downwards through the air nozzle, so that cooling is carried out at the first time when the film head discharges the film, and the cooling effect of the plastic film is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of film blowing machines, and specifically relates to a cooling mechanism for a film blowing machine. Background Art

[0002] A film blowing machine melts plastic particles and then blows them into films. There are many types of film blowing machines, such as PE, POF, PVC, etc. The films blown from brand-new particles are new materials, with uniform color, cleanliness, and good stretching of the bags.

[0003] Currently, in the existing film blowing machine, several air nozzles are arranged in the inner ring of the annular frame to blow air on the passing plastic film bag, so as to achieve the purpose of cooling. However, since the annular frame is far from the die head, and the temperature near the outlet of the die head is often higher, when the plastic film bag moves upward, it often cannot be cooled immediately, thus affecting the cooling efficiency of the plastic film. Therefore, a cooling mechanism for a film blowing machine is provided. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cooling mechanism for a film blowing machine, so as to solve the problem that since the annular frame is far from the die head, and the temperature near the outlet of the die head is often higher, when the plastic film bag moves upward, it often cannot be cooled immediately, thus affecting the cooling efficiency of the plastic film.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A cooling mechanism for a film blowing machine, including a film blowing machine body, a die head is arranged on the film blowing machine body, a chiller is arranged on one side of the film blowing machine body, an annular water tank is arranged on the film blowing machine body and outside the die head, an annular cavity is arranged on the film blowing machine body and above the annular water tank, an upper water pipe is arranged between the chiller and the annular cavity, a lower water pipe extending into the annular water tank is arranged at the bottom of the annular cavity, a return water pipe is arranged between the bottom of the annular water tank and the chiller, and a circulation pump is arranged on the return water pipe;

[0006] An annular air cavity is arranged inside the annular cavity, a blower is arranged on the film blowing machine body, an air inlet pipe is arranged between the air outlet end of the blower and the annular air cavity, several air nozzles are arranged at the bottom of the annular cavity, and a heat exchange pipe is arranged between the annular air cavity and the air nozzles.

[0007] Preferably, a support frame is arranged on the film blowing machine body, and the annular cavity is installed above the annular water tank through the support frame.

[0008] Preferably, an annular heat exchange plate is arranged on the inner ring side wall of the annular cavity, and the annular heat exchange plate is made of a thin copper sheet.

[0009] Preferably, the heat exchange tube is made of copper tube and is arranged in a spiral shape.

[0010] Preferably, a liquid level gauge is provided inside the annular water tank, and a water inlet pipe communicating with an external water supply device is provided on one side of the annular water tank.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: In the process of using a cooling mechanism for a film blowing machine of the present utility model, when starting the chiller, the cooling water enters the annular cavity through the upper water pipe, and enters the inner side of the annular water tank through the lower water pipe. Then, through the circulation pump, the water in the annular water tank returns to the chiller through the return water pipe for circulation. The temperature near the film head outlet is reduced by the cooling water in the annular water tank, effectively avoiding too high temperature near the film head outlet.

[0012] During the upward movement of the plastic film bag, by starting the blower, the air is sprayed out from the air nozzle after passing through the air inlet pipe, the annular air cavity, and the heat exchange tube in sequence. The air in the annular air cavity is cooled by passing through the heat exchange tube, and blows downward through the air nozzle, realizing cooling at the first time when the film comes out of the film head and ensuring the cooling effect of the plastic film. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the main sectional structure schematic diagram of the present utility model;

[0014] Figure 2 is Figure 1 the partial enlarged structure schematic diagram at A of

[0015] Figure 3 is Figure 1 the partial enlarged structure schematic diagram at B of

[0016] In the figure: 1. Film blowing machine body; 1-1. Film head; 2. Chiller; 3. Annular water tank; 4. Annular cavity; 5. Upper water pipe; 6. Lower water pipe; 7. Return water pipe; 8. Circulation pump; 9. Annular air cavity; 10. Blower; 11. Air inlet pipe; 12. Air nozzle; 13. Heat exchange tube; 14. Support frame; 15. Annular heat exchange plate; 16. Liquid level gauge; 17. Water inlet pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figures 1-3, the present utility model provides a technical solution: a cooling mechanism for a film blowing machine, including a film blowing machine body 1, a film head 1-1 is provided on the film blowing machine body 1, the film head 1-1 is used for film blowing, a water chiller 2 is provided on one side of the film blowing machine body 1, the water chiller 2 is used for refrigerating water, an annular water tank 3 is provided on the film blowing machine body 1 and outside the film head 1-1, an annular cavity 4 is provided on the film blowing machine body 1 and above the annular water tank 3, the central axes of the annular water tank 3 and the annular cavity 4 coincide, an upper water pipe 5 is provided between the water chiller 2 and the annular cavity 4, a lower water pipe 6 extending into the annular water tank 3 is provided at the bottom of the annular cavity 4, a return water pipe 7 is provided between the bottom of the annular water tank 3 and the water chiller 2, and a circulation pump 8 is provided on the return water pipe 7. When in use, start the water chiller 2 to make the cooled cold water enter the annular cavity 4 through the upper water pipe 5, the water in the annular cavity 4 enters the inside of the annular water tank 3 through the lower water pipe 6, and start the circulation pump 8 to make the water in the annular water tank 3 return to the water chiller 2 through the return water pipe 7 for cooling, realizing the circulating refrigeration of water. The temperature near the outlet of the film head 1-1 is reduced by the cooling water in the annular water tank 33, effectively avoiding the problem of too high temperature near the film head outlet.

[0019] Specifically, an annular air cavity 9 is provided inside the annular cavity 4. The annular air cavity 9 is arranged as an annular copper pipe, improving the cooling effect on the air. A hair dryer 10 is provided on the film blowing machine body 1. An air inlet pipe 11 is provided between the air outlet end of the hair dryer 10 and the annular air cavity 9. A plurality of air nozzles 12 are provided at the bottom of the annular cavity 4. The plurality of air nozzles 12 are evenly distributed at the bottom of the annular cavity 4 and all incline towards the direction of the plastic film bag. A heat exchange pipe 13 is provided between the annular air cavity 9 and the air nozzles 12. The air in the annular air cavity 9 is quickly cooled through the heat exchange pipe 13. When in use, by starting the hair dryer 10, the external air enters the air inlet pipe 11, the annular air cavity 9, the heat exchange pipe 13 in sequence and then is ejected from the air nozzles 12. By blowing cold air downward from the air nozzles 12, the cooling is realized at the first time when the film comes out of the film head 1-1, ensuring the cooling effect of the plastic film.

[0020] Specifically, a support frame 14 is provided on the film blowing machine body 1. The annular cavity 4 is installed above the annular water tank 3 through the support frame 14. The support frame 14 includes four support columns and a mounting seat for mounting the annular cavity 4. The installation of the annular cavity 4 is realized by setting the support frame 14, and at the same time, the stability of the position of the annular cavity 4 is ensured.

[0021] Specifically, an annular heat exchange plate 15 is provided on the inner ring side wall of the annular cavity 4. The annular heat exchange plate 15 is hermetically installed on the inner wall of the annular cavity 4. The annular heat exchange plate 15 is set as a thin copper sheet, effectively ensuring the heat exchange efficiency of the annular heat exchange plate 15. When the plastic film bag passes through the annular cavity 4, the plastic film bag is cooled and heat exchanged through the annular heat exchange plate 15, improving the cooling effect on the plastic film bag.

[0022] Specifically, the heat exchange tube 13 is set as a copper tube, and the heat exchange tube 13 is arranged in a spiral shape. When the air in the annular cavity 4 passes through the heat exchange tube 13, the cooling water in the annular cavity 3 exchanges heat with the heat exchange tube 13. By setting the heat exchange tube 13 as a copper tube, rapid cooling of the air is ensured. By arranging the heat exchange tube 13 in a spiral shape, the heat exchange time with the air is increased, ensuring the cooling effect on the air.

[0023] Specifically, a liquid level gauge 16 is provided inside the annular water tank 3. The liquid level gauge 16 is used to detect the liquid level height in the annular water tank 3. A water inlet pipe 17 communicating with an external water supply device is provided on one side of the annular water tank 3. The water inlet pipe 17 is used to replenish water into the annular water tank 3 through the water supply device. During use, by setting a threshold range for the liquid level gauge 16, when the liquid level height in the annular water tank 3 is less than the lowest value of the threshold range of the liquid level gauge 16, the water supply device is started to allow the external water source to enter the annular water tank 3 through the water inlet pipe 17 for water replenishment. When the liquid level height in the annular water tank 3 reaches the highest value of the threshold range of the liquid level gauge 16, the water supply device is stopped, and the water inlet pipe 17 stops replenishing water into the annular water tank 3, realizing automatic water replenishment for the annular water tank 3 and ensuring the continuous use of the cooling mechanism of the film blowing machine.

[0024] Working principle: When the present utility model is working, first, the chiller 2 and the circulation pump 8 are started, so that the cooling water sequentially passes through the upper water pipe 5, the annular cavity 4, the lower water pipe 6, the annular water tank 3, and the return water pipe 7 and then returns to the chiller 2 to realize circulation, reducing the temperature near the outlet of the die head 1-1. At the same time, the blower 10 is started, so that the external air sequentially enters the air inlet pipe 11, the annular air cavity 9, and the heat exchange tube 13 and then is ejected downward from the air nozzle 12, cooling the plastic film at the first time when it exits from the die head 1-1 and ensuring the cooling effect of the plastic film.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding in the existing technology. The machines, parts, and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be elaborated here.

[0027] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling mechanism for a film blowing machine, comprising a film blowing machine body (1), and a film head (1-1) is arranged on the film blowing machine body (1), characterized in that: On one side of the blown film machine body (1), there is a chiller (2). On the blown film machine body (1) and outside the die head (1-1), there is an annular water tank (3). Above the annular water tank (3) on the blown film machine body (1), there is an annular cavity (4). Between the chiller (2) and the annular cavity (4), there is an upper water pipe (5). At the bottom of the annular cavity (4), there is a lower water pipe (6) extending into the annular water tank (3). Between the bottom of the annular water tank (3) and the chiller (2), there is a return water pipe (7), and a circulation pump (8) is provided on the return water pipe (7). Inside the annular cavity (4), there is an annular air cavity (9). On the blown film machine body (1), there is a blower (10). Between the air outlet end of the blower (10) and the annular air cavity (9), there is an air inlet pipe (11). At the bottom of the annular cavity (4), there are several air nozzles (12). Between the annular air cavity (9) and the air nozzles (12), there is a heat exchange pipe (13).

2. The cooling mechanism for a blown film machine according to claim 1, wherein: On the blown film machine body (1), there is a support frame (14). The annular cavity (4) is installed above the annular water tank (3) through the support frame (14).

3. The cooling mechanism for a blown film machine according to claim 1, characterized in that: On the inner ring side wall of the annular cavity (4), there is an annular heat exchange plate (15). The annular heat exchange plate (15) is set as a thin sheet made of copper material.

4. A cooling mechanism for a blown film machine according to claim 1, characterized in that: The heat exchange pipe (13) is set as a copper pipe, and the heat exchange pipe (13) is arranged in a spiral shape.

5. The cooling mechanism for a blown film machine according to claim 1, characterized in that: Inside the annular water tank (3), there is a liquid level gauge (16). On one side of the annular water tank (3), there is a water inlet pipe (17) communicated with an external water supply device.

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