Double-air-opening air ring of film blowing machine

Abstract

The utility model discloses a double-air-opening air ring of a film blowing machine. The double-air-opening air ring comprises a lower air disc, an upper air disc, a first connecting ring, a second connecting ring and an air lip ring, the upper air disc covers the lower air disc in a sealing mode, a gap between a first inner air wall extending from the surface of the lower air disc and the upper air disc forms a first air channel opening, the upper air disc is provided with an inner thread groove, and the flow control annular plate can move up and down by relatively rotating along the inner thread groove so as to adjust the opening size of the air channel opening, so that the air flow ventilation quantity is controlled. The flow speed of airflow is changed, it can be guaranteed that the air speed and air temperature float little when the air volume is adjusted, the output power is adjusted more flexibly compared with a fan connected to the air inlet position, more matched adjusting schemes are provided, and the use experience of equipment is improved; the connecting ring forms two branch air channels in the air ring, so that air flow is dispersed in the height direction of the film bubbles and is uniformly distributed, air outlet is more stable and uniformly distributed, deformation of the film bubbles is avoided, and the yield is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of film blowing machines, in particular to a double-air outlet air ring of a film blowing machine. Background Art

[0002] The film blowing machine is a device that heats and melts plastic particles and then blows them into thin films. It is often used to make packaging bags. The cross-section of the film bubble is circular, and it needs a circular cooling airflow to cool the surroundings. Since the strength of the film bubble is low when it is not cooled, the airflow and the film bubble must have a certain angle, and the airflow direction cannot be perpendicular to the longitudinal direction of the film bubble, otherwise the film bubble will be deformed due to excessive force. For this reason, the blown film bubble is cooled and shaped by the air ring of the film blowing machine. The high-speed airflow blown by the fan enters the air chamber body of the air ring from the air inlet of the air ring. The maze-like wind wall formed inside stabilizes the airflow, guides the flow direction of the airflow through the guide blades, and finally sprays out from the circular air outlet of the air ring. The circular air outlet is set to keep the outlet air at an appropriate angle with the film bubble to avoid vertical blowing to the film bubble. The heat on the film bubble is dispersed under the action of the cooling airflow, so that it can be quickly cooled and shaped. Therefore, as one of the key components for cooling and supporting the film bubble, the air ring has an important impact on the blowing quality and production efficiency of the film.

[0003] The existing wind ring mainly adjusts its airflow and ventilation volume by connecting a fan at the air inlet to adjust the output power. The method is relatively simple and the wind ring itself cannot be flexibly adjusted, which needs to be improved. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a double-air outlet air ring for a film blowing machine to solve the above problems.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a double-air-inlet air ring of a film blowing machine, which comprises a lower air disc, an upper air disc, a first connecting ring, a second connecting ring and an air lip ring.

[0007] The lower wind disc is extended to form a first inner wind wall, the lower wind disc is provided with a plurality of air inlets, the upper wind disc is extended to form an outer wind wall and a second inner wind wall, the upper wind disc is sealed above the lower wind disc, and the two are mutually opposed to form a ring-shaped main wind duct, so that the first inner wind wall is located between the outer wind wall and the second inner wind wall, the gap between the first inner wind wall and the upper wind disc constitutes a first wind duct opening, and the gap between the second inner wind wall and the lower wind disc constitutes a second wind duct opening;

[0008] The first connecting ring and the second connecting ring are located on the inner circle side of the upper wind disk, the first connecting ring is placed on the lower wind disk, the first sub-air duct formed by the gap between the first connecting ring and the lower wind disk is connected to the main air duct, the second connecting ring is placed on the first connecting ring, the second sub-air duct formed by the gap between the second connecting ring and the first connecting ring is connected to the main air duct, the air lip ring is sleeved on the second connecting ring, the upper wind disk is provided with an internal thread groove corresponding to the first air duct opening, the internal thread groove is threadedly connected with a flow control ring plate, the flow control ring plate can be spirally displaced up and down by relative rotation along the internal thread groove to adjust the opening size of the first air duct opening.

[0009] Preferably, a holding handle is connected to the flow control ring plate.

[0010] Preferably, the air inlets on the lower air disc are symmetrically arranged around the edge of the lower air disc, and one or more holding handles are symmetrically connected to the flow control ring plate.

[0011] Preferably, the inner edge of the lower air disc forms a first guide flange extending away from the center and upward, so that the first air outlet between the inner edge of the lower air disc and the inner edge of the first connecting ring faces upward and away from the center for air to be discharged, and the inner edge of the first connecting ring forms a second guide flange extending away from the center and upward, so that the second air outlet between the inner edge of the first connecting ring and the inner edge of the second connecting ring faces upward and away from the center for air to be discharged.

[0012] Preferably, the lower wind disc is provided with spoiler blades located between the main air duct and the first air outlet.

[0013] Preferably, the air lip ring comprises a base, a cooling ring and a guide portion which are connected in sequence, the base is sleeved on the second connecting ring, a plurality of rows of exhaust holes are provided on the cooling ring, and the guide portion is a circular ring structure extending vertically upward.

[0014] Preferably, a temperature sensor is installed on the inner side of the guide portion.

[0015] Preferably, the lower wind disc and the upper wind disc are aluminum alloy castings.

[0016] The technical effects achieved by the technical solution of the utility model include:

[0017] The flow control ring plate can be moved up and down by relatively rotating along the inner thread groove to adjust the opening size of the first air duct opening, thereby controlling the airflow from the first air duct opening to the second air duct opening and changing the airflow velocity. The flow control ring plate rotates relatively by the thread structure, which can ensure that the fluctuation of wind speed and wind temperature is small when adjusting the air volume. Compared with simply relying on the fan connected to the air inlet to adjust the output power, it is more flexible and provides other coordinated adjustment solutions to improve the equipment use experience;

[0018] Two branch air ducts are formed inside the air ring to disperse the airflow evenly in the height direction of the film bubble, so that the airflow is more stable and evenly distributed. The wind wall and guide blades are used to guide the flow direction of the cooling air, so that the cold air forms a ring airflow inside the air ring, which can further reduce the wind pressure, avoid deformation of the film bubble caused by excessive wind pressure, and ensure the yield rate;

[0019] The structure of the first guide ridge and the second guide ridge guides the air outlet to maintain an appropriate angle with the film bubble, and the air outlet is directed upward and away from the center to avoid vertical blowing to the film bubble. The heat on the film bubble can be quickly taken away by the cooling air flow, and the film bubble can be quickly cooled and shaped, effectively improving the film quality.

[0020] The wind ring composed of the lower wind disc, the upper wind disc, the first connecting ring, the second connecting ring and the wind lip ring has a simple structure, is quick to assemble, has low cost and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of a double-air outlet air ring of a film blowing machine provided by an embodiment of the utility model;

[0022] Figure 2 The exploded diagram of the double tuyere air ring is shown in FIG.

[0023] Figure 3 is a schematic diagram of the internal structure of the double-air outlet air ring;

[0024] Figure 4 For the corresponding Figure 3 A local enlarged view of the circular dotted box area A in FIG.

[0025] The reference numerals in the above drawings are:

[0026] Lower wind disc 1, air inlet 10, first air duct opening 10a, second air duct opening 10b, main air duct 101, first branch air duct 102, second branch air duct 103, first inner wind wall 11, first guide flange 12, first air outlet 120, spoiler blade 13, upper wind disc 2, inner thread groove 20, outer wind wall 21, second inner wind wall 22, first connecting ring 3, second guide flange 31, second air outlet 310, second connecting ring 4, air lip ring 5, base 51, cooling ring 52, guide part 53, exhaust hole 520, flow control ring plate 6, holding handle 61. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the utility model shown in the accompanying drawings and described according to the accompanying drawings are merely exemplary, and the utility model is not limited to these embodiments.

[0028] In order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the drawings, while other details that are not very relevant are omitted.

[0029] Reference Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a double-air outlet air ring of a film blowing machine, which includes a lower air disc 1, an upper air disc 2, a first connecting ring 3, a second connecting ring 4 and an air lip ring 5.

[0030] Combination Figure 2 , Figure 3 as well as Figure 4 As shown, the lower wind disc 1 is extended to form a first inner wind wall 11, and the lower wind disc 1 is provided with a plurality of air inlets 10. The upper wind disc 2 is extended to form an outer wind wall 21 and a second inner wind wall 22, respectively, and the upper wind disc 2 is sealed above the lower wind disc 1, and mutually encloses a ring-shaped main wind duct 101, so that the first inner wind wall 11 is located between the outer wind wall 21 and the second inner wind wall 22, and the gap between the first inner wind wall 11 and the upper wind disc 2 constitutes a first wind duct opening 10a, and the gap between the second inner wind wall 22 and the lower wind disc 1 constitutes a second wind duct opening 10b;

[0031] The first connecting ring 3 and the second connecting ring 4 are located on the inner circle side of the upper wind disk 2. The first connecting ring 3 is placed on the lower wind disk 1. The first sub-air duct 102 formed by the gap between the first connecting ring 3 and the lower wind disk 1 is connected to the main air duct 101. The second connecting ring 4 is placed on the first connecting ring 3. The second sub-air duct 103 formed by the gap between the second connecting ring 4 and the first connecting ring 3 is connected to the main air duct 101. The air lip ring 5 is sleeved on the second connecting ring 4.

[0032] The inner edge of the lower air disc 1 forms a first guide ridge 12 extending upward away from the center, so that the first air outlet 120 between the inner edge of the lower air disc 1 and the inner edge of the first connecting ring 3 is oriented upward and away from the center for air to be discharged. The inner edge of the first connecting ring 3 forms a second guide ridge 31 extending upward away from the center, so that the second air outlet 310 between the inner edge of the first connecting ring 3 and the inner edge of the second connecting ring 4 is oriented upward and away from the center for air to be discharged.

[0033] from Figure 3 and Figure 4 It can be seen that the fan blows a high-speed airflow into the connected air inlet 10 and enters the main air duct 101, passes through the first air duct opening 10a and the second air duct opening 10b in sequence, and is divided into two air flows, which respectively pass through the first branch air duct 102 and then are ejected from the first air outlet 120, and pass through the second branch air duct 103 and then are ejected from the second air outlet 310.

[0034] Since two branch air ducts are formed inside the wind ring, the air flow is dispersed and evenly distributed in the height direction of the film bubble, so that the air outlet is more stable and evenly distributed, and the wind wall and guide blades are used to guide the flow direction of the cooling air, so that the cold air forms a ring airflow inside the wind ring, which can further reduce the wind pressure and avoid deformation of the film bubble caused by excessive wind pressure. The structure of the first guide edge 12 and the second guide edge 31 guides the air outlet to maintain an appropriate angle with the film bubble, and the air outlet is directed upward and away from the center to avoid vertical blowing towards the film bubble, and the heat on the film bubble can be quickly taken away by the cooling airflow, so the film bubble can be quickly cooled and formed, with good cooling effect, effectively improving the film quality.

[0035] The upper air disk 2 is provided with an internal thread groove 20 corresponding to the first air duct opening 10a, and a flow control ring plate 6 is threadedly connected in the internal thread groove 20. The flow control ring plate 6 can be spirally advanced and retreated and moved up and down by relative rotation along the internal thread groove 20 to adjust the opening size of the first air duct opening 10a, thereby controlling the airflow ventilation volume from the first air duct opening 10a to the second air duct opening 10b, and changing the flow rate of the airflow. The flow control ring plate 6 rotates relatively by the thread structure, and when adjusting the air volume, it can ensure that the fluctuation of wind speed and wind temperature is small. Compared with relying solely on the fan connected to the air inlet to adjust the output power, it is more flexible and provides other coordinated adjustment solutions to improve the equipment usage experience.

[0036] Since the circumferential rotation path of the flow control ring plate 6 is relatively long and the thread structure itself is relatively stable, a holding handle 61 is connected to the flow control ring plate 6. By adding the holding handle 61, it is convenient to apply force to rotate it, thereby improving working efficiency.

[0037] Furthermore, the air inlets 10 on the lower air disc 1 are symmetrically arranged around the edge of the lower air disc 1 , and one or more holding handles 61 are symmetrically connected to the flow control ring plate 6 .

[0038] The lower air disc 1 is provided with spoiler blades 13 between the main air duct 101 and the first air outlet 120. The spoiler blades 13 are used to prevent the cold air from flowing straightly at high speed, thereby further improving the airflow resistance and guidance.

[0039] Specifically, the air lip ring 5 includes a base 51, a cooling ring 52 and a guide portion 53 which are connected in sequence. The base 51 is sleeved on the second connecting ring 4. The cooling ring 52 is provided with multiple rows of exhaust holes 520. The guide portion 53 is a circular ring structure extending vertically upward.

[0040] A temperature sensor is installed inside the guide portion 53. Furthermore, a wind pressure sensor may be installed inside the guide portion 53 to monitor wind pressure and temperature in real time during the cooling process to ensure stable operation and improve the unit output.

[0041] Taking the sealing characteristics and the strength of the structure into consideration, the lower wind disc 1 and the upper wind disc 2 are aluminum alloy castings, which have excellent physical properties of corrosion resistance and wear resistance, long service life and low maintenance cost.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A double-inlet air ring for a film blowing machine, characterized in that: It comprises a lower wind disc (1), an upper wind disc (2), a first connecting ring (3), a second connecting ring (4) and a wind lip ring (5), A first inner wind wall (11) is extended from the lower wind disc (1), and a plurality of air inlets (10) are provided on the lower wind disc (1). The upper wind disc (2) is extended to form an outer wind wall (21) and a second inner wind wall (22), The upper wind disk (2) is sealed above the lower wind disk (1) and faces each other to enclose an annular main wind duct (101), so that the first inner wind wall (11) is located between the outer wind wall (21) and the second inner wind wall (22), the gap between the first inner wind wall (11) and the upper wind disk (2) forms a first wind duct opening (10a), and the gap between the second inner wind wall (22) and the lower wind disk (1) forms a second wind duct opening (10b), The first connecting ring (3) and the second connecting ring (4) are located on the inner circle side of the upper wind disk (2); the first connecting ring (3) is placed on the lower wind disk (1); a first branch air duct (102) formed by a gap between the first connecting ring (3) and the lower wind disk (1) is connected to the main air duct (101); the second connecting ring (4) is placed on the first connecting ring (3); a second branch air duct (103) formed by a gap between the second connecting ring (4) and the first connecting ring (3) is connected to the main air duct (101); the air lip ring (5) is sleeved on the second connecting ring (4); The upper air disc (2) is provided with an internal thread groove (20) corresponding to the first air duct opening (10a), a flow control ring plate (6) is threadedly connected in the internal thread groove (20), and the flow control ring plate (6) can be relatively rotated along the internal thread groove (20) to perform spiral up and down displacement to adjust the opening size of the first air duct opening (10a).

2. The double tuyere air ring of the film blowing machine according to claim 1, characterized in that: A holding handle (61) is connected to the flow control ring plate (6).

3. The double tuyere air ring of the film blowing machine according to claim 2, characterized in that: The air inlets (10) on the lower air disc (1) are symmetrically arranged around the edge of the lower air disc (1), and one or more holding handles (61) are symmetrically connected to the flow control ring plate (6).

4. The double tuyere air ring of the film blowing machine according to claim 1, characterized in that: The inner edge of the lower wind disc (1) forms a first guide ridge (12) extending away from the center and upward, so that the first air outlet (120) between the inner edge of the lower wind disc (1) and the inner edge of the first connecting ring (3) faces upward and discharges air away from the center; the inner edge of the first connecting ring (3) forms a second guide ridge (31) extending away from the center and upward, so that the second air outlet (310) between the inner edge of the first connecting ring (3) and the inner edge of the second connecting ring (4) faces upward and discharges air away from the center.

5. The double tuyere air ring of the film blowing machine according to claim 4, characterized in that: The lower wind disc (1) is provided with a spoiler blade (13) located between the main air duct (101) and the first air outlet (120).

6. The double tuyere air ring of the film blowing machine according to claim 1, characterized in that: The air lip ring (5) comprises a base (51), a cooling ring (52) and a guide portion (53) which are connected in sequence, the base (51) is sleeved on the second connecting ring (4), the cooling ring (52) is provided with a plurality of rows of exhaust holes (520), and the guide portion (53) is a circular ring structure extending vertically upward.

7. The double tuyere air ring of the film blowing machine according to claim 6, characterized in that: A temperature sensor is installed on the inner side of the guide portion (53).

8. The double tuyere air ring of the film blowing machine according to claim 1, characterized in that: The lower wind disc (1) and the upper wind disc (2) are aluminum alloy castings.

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