Film blowing air volume type air ring adjusted through flexible variable medium

Abstract

The invention discloses a film blowing air volume type air ring adjusted through a flexible variable medium, and relates to the technical field of film production equipment, the film blowing air volume type air ring comprises a base station, a lower air ring and an upper air ring, the lower air ring and the upper air ring are installed on the top of the base station, an air channel is reserved between the lower air ring and the upper air ring, and an adjusting mechanism is arranged in the air channel; the adjusting mechanism comprises a plurality of motor supports installed on the top of the upper air ring, a fixed shaft type stepping motor is fixedly installed on the top of each motor support, and an adjusting block is fixedly installed at the end of each fixed shaft type stepping motor through a plug pin. The outer sides of the multiple adjusting blocks are jointly and fixedly connected to a titanium alloy framework. And a direction control mechanism for adjusting the form of the air flow is arranged in the adjusting mechanism. The film blowing air volume type air ring capable of being adjusted through the flexible variable medium has the effects of being multifunctional and high in stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of film production equipment, and particularly relates to a blowing film air volume type air ring adjusted by a flexible variable medium. BACKGROUND

[0002] The blowing film air volume type air ring is a key component on a plastic blowing film production line, which blows out cooling air volume accurately adjusted to the plastic bubble pipe in a molten state just extruded from a mold opening to control the cooling speed and stability of the bubble pipe, so as to ensure the thickness uniformity of the plastic film and the product quality.

[0003] The gap of the air outlet of the traditional air ring is not convenient to adjust, and it is difficult to disassemble and assemble, and it is also difficult to realize uniform air supply of the air outlet, thereby causing "thin area" and "thick area" on the film bubble, resulting in large thickness tolerance of the final film, and even causing the film to deform and break; and the traditional air ring cannot change the type of air outlet, thereby being unable to meet the production requirements of different products, and having functional short boards. SUMMARY

[0004] The present application discloses a blowing film air volume type air ring adjusted by a flexible variable medium, which aims to solve the technical problems that the gap of the air outlet of the traditional air ring is fixed or adjusted by rigidity, it is difficult to disassemble and assemble, it is also difficult to realize absolutely uniform air supply on the circumference, and it is unable to change the type of air outlet, and has functional short boards.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: A blowing film air volume type air ring adjusted by a flexible variable medium, comprising a base, a lower air ring and an upper air ring mounted on the top of the base, a wind channel is reserved between the lower air ring and the upper air ring, an adjusting mechanism for controlling the air volume is arranged in the inside of the wind channel, the adjusting mechanism comprises a plurality of motor supports arranged in a ring shape and mounted on the top of the upper air ring, a fixed shaft type stepping motor is fixedly mounted on the top of each motor support, the end of the fixed shaft type stepping motor penetrates horizontally into the inside of the upper air ring and is fixedly installed with an adjusting block through a bolt, and the outside of a plurality of adjusting blocks is fixedly connected to a titanium alloy framework; A control direction mechanism for adjusting the air flow form is arranged in the inside of the adjusting mechanism, the control direction mechanism comprises an air channel arranged in the inside of each adjusting block, an air cavity is arranged in the inside of each titanium alloy framework, and a plurality of spiral plates are slidingly installed on the outside of each air cavity; The inside of the base is blown by stable air flow through the wind channel to shape the thermoplastic film, and the flow and flow direction of the air flow are adapted and controlled by the operation of the adjusting mechanism and the control direction mechanism.

[0006] By setting the adjusting mechanism on the basis of the air volume type air ring, using the adjusting mechanism at the air duct gap, through the pushing force, a controllable curve shape change is generated, a windward curved surface conforming to aerodynamics is formed, the membrane surface fluctuation caused by the mutation of the conventional air volume air port point position adjustment is reduced, the air port gap size of the corresponding position can be changed according to the real-time thickness curve feedback, the air volume function of the circumferential direction partition independent adjustment or the whole circle synchronous adjustment is realized, the additional control mechanism can change the gas flow direction of the air duct blowing according to the volume of the blown film, the flat and spiral gas flows are generated, the rotating gas flow can more gently and uniformly surround the film bubble, the local overcooling or overheating point is avoided, the cooling uniformity and stability are greatly improved on the premise of maintaining the thermoplastic efficiency.

[0007] In a preferred scheme, a plurality of titanium alloy skeletons are distributed in a ring shape along the inside of the air duct, and a plurality of titanium alloy skeletons are jointly sleeved and installed with an elastic silica gel ring on the outside.

[0008] By setting the elastic silica gel ring structure driven by the fixed shaft type stepping motor in the inside of the air duct, the gap of the air outlet is adjusted by the movement of the titanium alloy skeleton and the elastic deformation of the silica gel ring, compared with the traditional air volume type air ring, the adjustment process is gradually changed, the adjustment deviation is reduced, the elastic silica gel ring generates a controllable curve shape change under stress, a windward curved surface conforming to aerodynamics is formed, the membrane surface fluctuation caused by the mutation of the conventional air volume air port point position adjustment is reduced, the real-time thickness curve feedback is realized, the fixed shaft type stepping motor of the corresponding position receives the electric signal to push the elastic silica gel ring to generate elastic deformation from zero position, the air duct gap size of the corresponding position is changed, the air volume function of the circumferential direction partition independent adjustment or the whole circle synchronous adjustment is realized, the silica gel has a small mass and a soft texture, compared with the fluororubber, the silica gel has a wider temperature range, and under the condition of the same thickness, the tensile property of the silica gel is better than that of the fluororubber, the adjustment pushing resistance is small, the corresponding fixed shaft type stepping motor has a small size, the overall structure is more light and compact, the fixed shaft type stepping motors of each point are modularly installed, if damaged, only the corresponding point module needs to be replaced, the maintenance cost is low, the operation is convenient, and the elastic silica gel ring has the functions of air flow buffering and shock absorption in the adjustment process, which can reduce the equipment noise.

[0009] In a preferred scheme, the air duct and the air cavity are connected in penetration, and the spiral plate is extruded and contacted on the inside of the elastic silica gel ring.

[0010] By further setting the air passage and air cavity structure on the basis of the titanium alloy framework and the adjusting block, high-pressure gas is introduced into the air cavity according to the requirement, and then the spiral plate located in the air cavity is pushed to move horizontally outward, the elastic silica gel ring is pushed to move at the same time, and then the surface of the elastic silica gel ring is deformed and spiral lines are generated, the airflow direction in the air duct is changed by using the lines, two kinds of airflows, flat and spiral, are generated, the rotating airflow can more gently and uniformly surround the film bubble, and local overcooling or overheating points are avoided, the cooling uniformity and stability are greatly improved on the premise of maintaining the thermoplastic efficiency.

[0011] In a preferred scheme, a hinge interface is arranged in the adjusting block, and the output end of the fixed shaft type stepping motor is fixedly connected with the adjusting block through the hinge interface and a pin.

[0012] The output end of the fixed shaft type stepping motor is fixedly connected with the adjusting block through the hinge interface and the pin, and the position of the adjusting block is autonomously adjusted, and the functionality is improved.

[0013] In a preferred scheme, the outer surface of the elastic silica gel ring is provided with a round corner edge at the upper end and the lower end, the round corner edge is arranged in the air duct, and the bottom of each spiral plate is provided with an arc edge.

[0014] The round corner plate and the arc edge are arranged at the end of the elastic silica gel ring and the spiral plate respectively, and the stability of airflow movement is greatly improved by using the flexible edge arc.

[0015] As known from the above, the blowing film air volume type air ring adjusted by the flexible variable medium has the following technical effects.

[0016] Firstly, the elastic silica gel ring structure driven by the fixed shaft type stepping motor is arranged in the air duct, the gap of the air outlet is adjusted by the movement of the titanium alloy framework and the deformation of the elastic silica gel ring, compared with the traditional air volume type air ring, the gradual change in the adjustment process reduces the adjustment deviation, the elastic silica gel ring generates controllable curve deformation under stress, forms a windward curved surface conforming to aerodynamics, reduces the film surface fluctuation caused by the point adjustment of the conventional air volume air outlet, and the device can feed back the real-time thickness curve, the fixed shaft type stepping motor at the corresponding position receives the electric signal to push the elastic silica gel ring to deform from zero position, changes the size of the air duct gap at the corresponding position, and realizes the function of independently adjusting or synchronously adjusting the air volume in the circumferential direction.

[0017] Secondly, the adopted elastic silica gel ring is small in mass, soft in texture, wider in temperature range than fluorine rubber, and better in tensile resistance than fluorine rubber under the condition of same thickness, so that the fixed shaft type stepping motor is small in size, the overall structure is more compact, the fixed shaft type stepping motor at each point is installed in a modular way, and the corresponding point module can be replaced alone if damaged, so that the maintenance cost is low, the operation is convenient, the elastic silica gel ring has air flow buffering and damping effects during adjustment, and the equipment noise can be reduced.

[0018] Thirdly, the air duct and air cavity structure are further arranged on the basis of the titanium alloy framework and the adjusting block, high-pressure gas is introduced into the air cavity according to requirements, the spiral plate in the air cavity is pushed to move horizontally outward, the elastic silica gel ring is pushed to move at the same time, the surface of the elastic silica gel ring is deformed and spiral lines are generated, the lines change the air flow direction in the air duct, spiral air flow is generated, the film bubble can be more gently and uniformly surrounded, local overcooling or overheating points are avoided, the cooling uniformity and stability are greatly improved under the premise of maintaining the thermoplastic efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The main view structure diagram of the present application is shown.

[0020] Figure 2 The top view structure diagram of the present application is shown.

[0021] Figure 3 The cross-sectional structure explosion diagram of the present application is shown.

[0022] Figure 4 The fixed shaft type stepping motor structure of the present application is shown. Figure 1 The structure enlargement diagram of A in the present application is shown.

[0023] Figure 5 The fixed shaft type stepping motor structure cross-sectional view of the present application is shown.

[0024] Figure 6 The fixed shaft type stepping motor structure explosion diagram of the present application is shown.

[0025] Figure 7 The adjusting mechanism structure explosion diagram of the present application is shown.

[0026] Figure 8 The adjusting mechanism structure cross-sectional view of the present application is shown.

[0027] Figure 9 The titanium alloy framework structure side view of the present application is shown.

[0028] In the figure: 1, base; 101, connecting ring; 2, lower wind ring; 3, upper wind ring; 4, air duct; 5, adjusting mechanism; 501, motor support; 502, fixed shaft stepper motor; 503, adjusting block; 5031, hinged port; 504, titanium alloy framework; 505, elastic silica gel ring; 5051, round corner; 6, direction control mechanism; 601, air channel; 602, air cavity; 6021, telescopic groove; 603, spiral plate; 6031, arc edge; 604, hose; 7, wind cover. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0030] The disclosed blowing film air volume type wind ring adjusted by flexible variable medium is mainly applied to the scene of producing thermoplastic film.

[0031] Referring to Figures 1 to 9 The blowing film air volume type wind ring adjusted by flexible variable medium comprises a base 1, a lower wind ring 2 and an upper wind ring 3 installed on the top of the base 1, an air duct 4 reserved between the lower wind ring 2 and the upper wind ring 3, an adjusting mechanism 5 for controlling the air volume size arranged in the air duct 4, a plurality of motor supports 501 arranged in a ring shape and installed on the top of the upper wind ring 3, a fixed shaft stepper motor 502 fixedly installed on the top of each motor support 501, an adjusting block 503 horizontally penetrating into the inside of the upper wind ring 3 through the end of the fixed shaft stepper motor 502 and fixedly installed by a bolt, and a titanium alloy framework 504 fixedly connected to the outside of the plurality of adjusting blocks 503. The inside of the adjusting mechanism 5 is provided with a direction control mechanism 6 for adjusting the air flow form, the direction control mechanism 6 comprises an air channel 601 opened in the inside of each adjusting block 503, an air cavity 602 opened in the inside of each titanium alloy framework 504, and a plurality of spiral plates 603 slidingly installed on the outside of each air cavity 602. The stable air flow is blown into the inside of the base 1 by the air duct 4 to shape the thermoplastic film, and the flow and flow direction of the air flow are adapted and controlled by the operation of the adjusting mechanism 5 and the direction control mechanism 6.

[0032] In this embodiment: the worker sequentially assembles and fixes the base 1, lower air ring 2, and upper air ring 3, and connects the air duct 4 to the external fan. At the same time, the plastic melt is extruded from the middle of the base 1 to form a vertically upward tubular membrane bubble. At this time, the external fan connected to the air duct 4 starts to run. The airflow generated by the fan enters the interior of the lower air ring 2 and upper air ring 3 through the air duct 4 and is sprayed onto the surface of the membrane bubble at a certain angle. The high-speed cold air will undergo forced convection heat exchange with the surface of the high-temperature membrane bubble, thereby rapidly carrying away a large amount of heat, causing the membrane bubble to cool and solidify. During this process, the adjustment mechanism 5 operates synchronously, extending into the interior of the air duct 4 to change the range of the airflow path of the air duct 4, thereby adjusting the flow speed of the airflow inside the air duct 4. The directional control mechanism 6 can operate synchronously along the interior of the adjustment mechanism 5 according to the worker's needs, thereby converting the direct current air generated by the air duct 4 into vortex air, improving cooling efficiency and stability.

[0033] A connecting ring 101 is installed between the base 1 and the downwind ring 2 to fix the base 1 and the downwind ring 2.

[0034] Furthermore, a wind shield 7 is fixedly installed on the top of the upper wind ring 3 to improve stability during the membrane bubble molding process.

[0035] Reference Figures 1 to 9 In a preferred embodiment, a plurality of titanium alloy frames 504 are arranged in a ring along the interior of the air duct 4, and an elastic silicone ring 505 is fitted onto the outer side of the plurality of titanium alloy frames 504.

[0036] During the process of introducing airflow into the lower air ring 2 and upper air ring 3 of the air duct 4, the adjustment mechanism 5 operates synchronously. At this time, the output end of the fixed-axis stepper motor 502 extends horizontally into the air duct 4. While extending, it pushes the titanium alloy frame 504 and the elastic silicone ring 505 to move synchronously into the air duct 4, thereby changing the range of the airflow path of the air duct 4 and adjusting the flow speed of the airflow inside the air duct 4. In addition, according to the feedback of the real-time thickness measurement curve, the fixed-axis stepper motor 502 at the corresponding position receives an electrical signal and pushes the elastic silicone ring 505 at the corresponding position to undergo elastic deformation from zero position, thereby changing the gap size of the air duct 4 at the corresponding position, realizing the function of independent adjustment of the circumferential zone or synchronous adjustment of the air volume throughout the circumference.

[0037] The adjusting block 503 has a through hinge interface 5031. The output end of the fixed axis stepper motor 502 and the adjusting block 503 are fixedly connected through the hinge interface 5031 and the pin. The pin is pulled out to adjust the position of the output end of the fixed axis stepper motor 502 inside the adjusting block 503, and the pin is put back into the hinge interface 5031, thereby changing the distance between the adjusting block 503 and the fixed axis stepper motor 502.

[0038] Furthermore, several telescopic grooves 6021 are provided through the outer side of the air chamber 602. Each spiral plate 603 is slidably installed inside a telescopic groove 6021, and a hose 604 is installed through the top of each air passage 601. The end of the hose 604 passes through the inside of the upper air ring 3 and is connected to an external pump.

[0039] Specifically, the outer surface of the elastic silicone ring 505 is provided with rounded corner edges 5051 at both the upper and lower ends. The rounded corner edges 5051 are distributed inside the air duct 4, and the bottom of each spiral plate 603 is provided with an arc edge 6031. The design of the rounded corner edges 5051 and the arc edge 6031 is used to reduce the interference encountered by the airflow when it flows along the inside of the air duct 4, thereby improving the stability of the airflow inside the air duct 4.

[0040] Reference Figure 1 , Figures 4 to 9 In a preferred embodiment, the air passage 601 and the air chamber 602 are connected in a continuous manner, and the spiral plate 603 is pressed against the inner side of the elastic silicone ring 505.

[0041] When the worker needs to change the airflow direction inside the air duct 4, the worker controls the external pump connected to the air duct 601. The pump introduces high-pressure gas into the air duct 601 and the air chamber 602, which in turn pushes the spiral plate 603 located inside the air chamber 602 to move horizontally outward. The moving spiral plate 603 pushes the elastic silicone ring 505, which in turn causes the surface of the elastic silicone ring 505 to deform and generate spiral patterns. At this time, the direct flow of gas along the surface of the elastic silicone ring 505 will be guided by the spiral patterns and become a spiral vortex, which cools and shapes the surface of the membrane bubble. The intensity of the spiral vortex is affected by factors such as wind speed, thickness of elastic silicone ring 505, and shape and size of spiral plate 603. These factors can be designed and adjusted according to production needs, and will not be elaborated here.

[0042] Working Principle: During use, the worker assembles and fixes the base 1, lower air ring 2, and upper air ring 3 in sequence, and connects the air duct 4 to the external fan. Simultaneously, molten plastic is extruded from the center of the base 1, forming a vertically upward-facing tubular membrane bubble. At this time, the external fan connected to the air duct 4 starts operating. The airflow generated by the fan enters the interior of the lower air ring 2 and upper air ring 3 through the air duct 4 and is sprayed onto the surface of the membrane bubble at a certain angle. The high-speed cold air undergoes forced convection heat exchange with the high-temperature membrane bubble surface, rapidly carrying away a large amount of heat, causing the membrane bubble to cool and solidify. During this process, the adjustment mechanism 5 operates synchronously. At this time, the output end of the fixed-axis stepper motor 502 extends horizontally into the air duct 4. Simultaneously, it pushes the titanium alloy frame 504 and the elastic silicone ring 505 to move synchronously into the air duct 4, thereby changing the flow path of the air duct 4 and adjusting the flow speed of the airflow inside the air duct 4. Furthermore, this equipment can adjust the flow speed based on real-time thickness curves. Feedback is received when the fixed-axis stepper motor 502 at the corresponding position receives an electrical signal, which drives the elastic silicone ring 505 at the corresponding position to undergo elastic deformation from zero position. This changes the gap size of the air duct 4 at the corresponding position, realizing the function of independent adjustment of air volume in the circumferential direction or synchronous adjustment of the whole circumference. When the worker needs to change the airflow direction inside the air duct 4, the worker controls the external pump connected to the air duct 601. The pump introduces high-pressure gas into the air duct 601 and the air chamber 602, which in turn pushes the spiral plate 603 located inside the air chamber 602 to move horizontally outward. The moving spiral plate 603 pushes the elastic silicone ring 505, which in turn causes the surface of the elastic silicone ring 505 to deform and generate spiral patterns. At this time, the direct gas flowing along the surface of the elastic silicone ring 505 will be guided by the spiral patterns and become a spiral vortex, which cools and shapes the surface of the membrane bubble more quickly. This is suitable for membrane production with higher cooling requirements.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A blown film airflow type air ring adjustable by a flexible variable medium, comprising a base (1), a lower air ring (2) and an upper air ring (3) mounted on the top of the base (1), characterized in that, A duct (4) is reserved between the lower air ring (2) and the upper air ring (3). An adjustment mechanism (5) for controlling the air volume is provided inside the duct (4). The adjustment mechanism (5) includes several motor brackets (501) arranged in a ring and installed on the top of the upper air ring (3). A fixed-axis stepper motor (502) is fixedly installed on the top of each motor bracket (501). The end of the fixed-axis stepper motor (502) extends horizontally into the interior of the upper air ring (3) and is fixedly installed with an adjustment block (503) by a pin. The outer sides of several adjustment blocks (503) are fixedly connected to a titanium alloy frame (504). The adjustment mechanism (5) is provided with a direction control mechanism (6) for adjusting the airflow pattern. The direction control mechanism (6) includes an air passage (601) opened inside each adjustment block (503). Each titanium alloy frame (504) is provided with an air chamber (602). Several spiral plates (603) are slidably installed on the outside of each air chamber (602). The thermoplastic film is shaped by blowing a stable airflow into the base (1) through the air duct (4), and the flow rate and direction of the airflow are adapted and controlled by the operation of the adjustment mechanism (5) and the direction control mechanism (6).

2. The blown film airflow type air ring with adjustable flexible variable medium according to claim 1, characterized in that, Several titanium alloy skeletons (504) are arranged in a ring along the inside of the air duct (4), and an elastic silicone ring (505) is fitted on the outer side of several titanium alloy skeletons (504).

3. The blown film airflow type air ring with adjustable flexible variable medium according to claim 2, characterized in that, The air passage (601) and the air chamber (602) are connected in a continuous manner, and the spiral plate (603) is pressed against the inner side of the elastic silicone ring (505).

4. The blown film airflow type air ring with adjustable flexible variable medium according to claim 1, characterized in that, A connecting ring (101) is installed between the base (1) and the downwind ring (2).

5. A blown film airflow type air ring with adjustable flexible variable medium according to claim 1, characterized in that, The adjusting block (503) has a through hinge interface (5031) inside, and the output end of the fixed shaft stepper motor (502) and the adjusting block (503) are fixedly connected through the hinge interface (5031) and the pin.

6. A blown film airflow type air ring with adjustable flexible variable medium according to claim 2, characterized in that, The elastic silicone ring (505) has rounded edges (5051) on both the upper and lower ends of its outer surface, and the rounded edges (5051) are distributed inside the air duct (4).

7. A blown film airflow type air ring with adjustable flexible variable medium according to claim 1, characterized in that, The outer side of the air cavity (602) is provided with several telescopic grooves (6021), and each spiral plate (603) is slidably installed inside one of the telescopic grooves (6021).

8. A blown film airflow type air ring adjustable by a flexible variable medium according to claim 1, characterized in that, Each of the spiral plates (603) has an arc edge (6031) at its bottom.

9. A blown film airflow type air ring with adjustable flexible variable medium according to claim 1, characterized in that, Each of the air passages (601) has a hose (604) installed through its top end, the end of which extends through the interior of the upper air ring (3) and connects to an external pump.

10. A blown film airflow type air ring adjustable by a flexible variable medium according to claim 1, characterized in that, A wind shield (7) is fixedly installed on the top of the upper wind ring (3).

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