A high efficiency film blowing machine

Abstract

The present application relates to the technical field of film blowing machines, and in particular to a high-efficiency film blowing machine. In order to solve the problem of low efficiency in the production of large-size films in the prior art, the film blowing machine comprises a melting assembly, a feeding assembly is arranged on one side of the melting assembly, a blow molding assembly is arranged on the side of the feeding assembly away from the melting assembly, and the blow molding assembly comprises an extrusion die head and a blower; a material distribution assembly is arranged between the feeding assembly and the extrusion die head, one end of the material distribution assembly is connected to the blow molding assembly, and the other end is connected to the extrusion die head; the feeding assembly comprises a plurality of parallel feeding units; a winding assembly is arranged on the side of the extrusion die head away from the blower, and an external air cooling assembly is arranged between the winding assembly and the extrusion die head. The present application has the effect of improving the film production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of film blowing machines, and in particular to a high-efficiency film blowing machine. Background Art

[0002] Plastic film has replaced most paper packaging as packaging. The demand for film is huge. The film can be formed by the flat extrusion blowing method. When this method is used, after the plastic raw material is melted in the extruder, the molten raw material is extruded through the flow channel formed between the head body of the blow molding head and the mold core to form a thin-walled tube. The thin-walled tube is then inflated by compressed air to form a film tube. At the same time, the film tube is cooled by an air ring device. The cooled film tube is then clamped flat by a herringbone plate to form a fitted film. Finally, the film is pulled to the winding roller for winding by a traction roller.

[0003] When a film with a larger diameter needs to be produced, the size of the die head of the existing technology machine is enlarged, but it is limited by the feeding mechanism, resulting in low extrusion efficiency. In addition, the cooling speed of large-sized films is slow, and it is easy to fail to completely cool and shape during winding, resulting in unstable quality of the finished product. The present application provides an efficient blow molding machine for producing large-sized plastic films. Utility Model Content

[0004] In order to improve the efficiency of film production, the present application provides a high-efficiency film blowing machine.

[0005] The high-efficiency film blowing machine provided in this application adopts the following technical solution:

[0006] A high-efficiency film blowing machine comprises a smelting component, a feeding component is arranged on one side of the smelting component, a blow molding component is arranged on the side of the feeding component away from the smelting component, and the blow molding component comprises an extrusion die head and a blower; a material distribution component is arranged between the feeding component and the extrusion die head, one end of the material distribution component is connected to the blow molding component, and the other end is connected to the extrusion die head; the feeding component comprises a plurality of feeding units connected in parallel; a winding component is arranged on the side of the extrusion die head away from the blower, and an external air cooling component is arranged between the winding component and the extrusion die head.

[0007] By adopting the above technical scheme, the melting component melts the raw materials and stirs them evenly, and conveys them to each feeding unit of the feeding component respectively. The feeding unit pressurizes and conveys the molten raw materials to the equalizing component. The equalizing component feeds the raw materials into the extrusion flow channel of the extrusion die head, and the equalizing component controls the flow rate of the raw materials. The molten raw materials pass through the extrusion flow channel to form a film tube. The blower blows from the inside of the film tube through the blowing channel. The external air cooling component blows air from the outside of the film tube to cool it. The inflated film tube is cooled to form a finished film. The winding component is started to pack the finished film into a film roll. The efficiency of feeding is improved by cooperating with multiple feeding units and the equalizing component, and the production efficiency of large-size films is improved. The added external air cooling component improves the efficiency of film shaping, realizes fully automated film blowing, and improves film blowing efficiency.

[0008] Optionally, the feeding unit is a screw feeder, and a plurality of the feeding units are arranged along the circumference of the extrusion die.

[0009] Optionally, the smelting assembly includes a plurality of smelting tanks, each of which is provided with a feed port and a discharge port, and one of the smelting tanks is connected to a feeding unit through the discharge port; and a stirring element driven by a motor is provided in the smelting tank.

[0010] Optionally, the material equalization assembly includes a material storage barrel, a feed pipe, a discharge pipe and a diaphragm pump, and the output ends of the multiple feeding units are connected to the material storage barrel, one end of the feed pipe is connected to the material storage barrel, and the other end is connected to the diaphragm pump; one end of the discharge pipe is connected to the diaphragm pump, and the other end is connected to the extrusion die head.

[0011] By adopting the above technical solution, the smelting tank melts the raw materials, stirs them evenly, and then inputs them into the conveying unit. The conveying unit simultaneously injects the raw materials into the storage barrel to keep the raw materials in the storage barrel full. The diaphragm pump extracts the raw materials in the storage barrel through the feed pipe and injects the raw materials into the extrusion die through the discharge pipe. The diaphragm pump evenly supplies the raw materials to the extrusion die to achieve uniform delivery of the raw materials and reduce the occurrence of uneven feeding during the production of large-size films. In addition, multiple feeding units feed the storage barrel at the same time, and the raw materials in the storage barrel are always full, reducing the possibility of production suspension due to insufficient raw materials in a certain smelting barrel. Compared with the setting of a single feeding unit, the fault tolerance of the equipment is improved.

[0012] Optionally, the extrusion die head includes a mold core, a mold barrel and a diverter hood, the mold core is arranged in the mold barrel, an extrusion channel is arranged between the mold core and the mold barrel, and the discharge pipe is installed on the end wall of the mold barrel close to the feed side of the extrusion channel; a connecting column is arranged on the outer peripheral wall of the mold core, and the end of the connecting column away from the mold core is connected to the inner peripheral wall of the mold barrel; the mold core is hollow, the connecting column is hollow, an air blast channel is arranged in the mold barrel and is connected with the connecting column and the internal cavity of the mold core, and the blower is installed on the end wall of the mold barrel close to the air inlet side of the air blast channel; the diverter hood is sleeved on the end of the mold core away from the blower, a plurality of through holes are opened on the outer peripheral wall of the diverter hood, the air blast channel is connected with the through holes, and the diverter hood is used for uniform inflation; a plurality of heating rings are also sleeved on the outer side of the mold barrel, and the heating rings are composed of electric heating wires.

[0013] By adopting the above technical solution, the raw material flows out of the discharge pipe and enters the extrusion flow channel. Under the action of pressure, it overcomes gravity and moves upward. During the movement, the heating ring maintains the temperature of the mold barrel to prevent the molten raw material from solidifying due to the low temperature of the mold barrel. The raw material is extruded on the discharge side of the extrusion flow channel to form a film tube. The blower injects air into the diverter hood through the blowing channel. At this time, the direction of the airflow is vertically upward. The vertically upward airflow is guided by the diverter hood to inject uniform airflow into each through hole, reducing the occurrence of uneven inflation of the film tube caused by the airflow blowing directly into the film tube.

[0014] Optionally, the external air cooling component includes an air ring, an air duct and a fan, the air ring is arranged between the extrusion die head and the winding component, and the air ring is sleeved on the outside of the film tube; the air ring is hollow and has an opening on the inner side, and the cross-section of the air ring is C-shaped; the air duct is installed on the outside of the air ring, the number of the air ducts is set to be multiple, the multiple air ducts are arranged along the circumference of the air ring, and the air duct is connected to the internal cavity of the air ring; the length direction of the air duct is perpendicular to the tangent direction of the connection point between the air duct and the air ring; the fan is installed at one end of the air duct away from the air ring, and the fan is connected to multiple air ducts.

[0015] By adopting the above technical solution, the fan injects airflow into multiple air ducts, and the airflow enters the air ring along the tangent direction of the air ring through the connection point between the air duct and the air ring, forming a spiral airflow in the air ring. In addition to the airflow overflowing from the opening of the air ring, part of the airflow moves in a spiral in the air ring. The spiral airflow will not directly impact the film tube, but will only take away the heat near the film tube, reducing the occurrence of film deformation. Before the winding assembly is wound, the film tube is cooled by the airflow, which speeds up the shaping efficiency of the film tube and improves the efficiency of large-size film production.

[0016] Optionally, the external air cooling component also includes a protective curtain, the top end of the protective curtain is installed on the winding component, and the bottom end of the protective curtain is set on the ground. The protective curtain closes the space around the extrusion die head and the film tube, and a notch is opened on the protective curtain for the feeding unit to pass through.

[0017] By adopting the above technical solution, the fan draws air from the protective curtain into the air ring, and the airflow overflowing from the air ring remains inside the protective curtain. The airflow circulates only within the range of the protective curtain, reducing the possibility of dust in the external air entering the protective curtain and adhering to the film tube.

[0018] Optionally, an air pressure sensor is provided outside the diverter hood, and the air pressure sensor is installed on the top wall of the diverter hood; the air pressure sensor is electrically connected to a controller, and the blower is also electrically connected to the controller; the controller controls the operation of the blower according to the change in the absolute pressure value of the gas in the film tube.

[0019] By adopting the above technical solution, during inflation, the air pressure sensor detects the change in the gas pressure value in the film tube in real time, and controls the flow unit and pressure unit of the input compressed air according to the signal value, and controls the operation of the blower. On the basis of stabilizing the production of blown film expansion, the possibility of the film tube rupture caused by excessive air pressure in the film tube is reduced.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The melting component melts the raw materials and stirs them evenly, and conveys them to each feeding unit of the feeding component respectively. The feeding unit pressurizes and conveys the molten raw materials to the evenly distributed component. The evenly distributed component feeds the raw materials into the extrusion flow channel of the extrusion die head, and the evenly distributed component controls the flow rate of the raw materials. The molten raw materials pass through the extrusion flow channel to form a film tube. The blower blows from the inside of the film tube through the blowing channel. The external air cooling component blows air from the outside of the film tube to cool it. The inflated film tube is cooled to form a finished film. Start the winding component to pack the finished film into a film roll. The feeding efficiency is improved by the cooperation of multiple feeding units and the evenly distributed component, and the production efficiency of large-size films is improved. The added external air cooling component improves the efficiency of film shaping, realizes fully automated film blowing, and improves film blowing efficiency;

[0022] 2. The smelting tank melts the raw materials, stirs them evenly, and then inputs them into the conveying unit. The conveying unit simultaneously injects the raw materials into the storage barrel to keep the raw materials in the storage barrel full. The diaphragm pump draws the raw materials out of the storage barrel through the feed pipe, and injects the raw materials into the extrusion die through the discharge pipe. The diaphragm pump evenly supplies the raw materials to the extrusion die to achieve uniform delivery of the raw materials and reduce the occurrence of uneven feeding during the production of large-size films. In addition, multiple feeding units feed the storage barrel at the same time, and the raw materials in the storage barrel are always full, reducing the possibility of production suspension due to insufficient raw materials in a certain smelting barrel. Compared with the setting of a single feeding unit, the fault tolerance of the equipment is improved;

[0023] 3. The fan injects air into multiple air ducts, and the air flows into the air ring along the tangent direction of the air ring through the connection point between the air duct and the air ring, forming a spiral airflow in the air ring. In addition to the airflow overflowing from the opening of the air ring, part of the airflow moves in a spiral in the air ring. The spiral airflow will not directly impact the film tube, but will only take away the heat near the film tube, reducing the deformation of the film. Before the winding assembly is wound, the film tube is cooled by the airflow, which speeds up the shaping efficiency of the film tube and improves the efficiency of large-size film production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a high-efficiency film blowing machine according to an embodiment of the present application.

[0025] Figure 2 It is a cross-sectional view of a high-efficiency film blowing machine.

[0026] Figure 3 yes Figure 2 A is an enlarged view of the middle image.

[0027] Explanation of the reference numerals: 1. Melting assembly; 11. Melting tank; 2. Feeding assembly; 21. Feeding unit; 3. Blow molding assembly; 31. Extrusion die; 311. Mold core; 312. Mold barrel; 313. Diverter hood; 3131. Through hole; 3132. Diverter protrusion; 314. Connecting column; 315. Extrusion flow channel; 316. Blowing channel; 317. Heating ring; 32. Blower; 4. Material equalization assembly; 41. Storage barrel; 42. Feeding pipe; 43. Discharging pipe; 44. Diaphragm pump; 5. Winding assembly; 6. External air cooling assembly; 61. Air ring; 62. Air duct; 63. Fan; 64. Protective curtain; 7. Air pressure sensor. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] The present application embodiment discloses a high-efficiency film blowing machine. Figure 1A high-efficiency film blowing machine includes a melting component 1, a feeding component 2 is provided on one side of the melting component 1, and the output end of the melting component 1 is connected to the input end of the feeding component 2. A blow molding component 3 is provided on the side of the feeding component 2 away from the melting component 1, and the blow molding component 3 includes an extrusion die 31 and a blower 32. An extrusion flow channel 315 and a blast channel 316 are provided in the extrusion die 31, and the blower 32 is connected to the blast channel 316 for blowing. A material distribution component 4 is provided between the feeding component 2 and the extrusion die 31, and the output end of the feeding component 2 is connected to the material distribution component 4, and the material distribution component 4 is connected to the extrusion flow channel 315. A winding component 5 is provided on the side of the extrusion die 31 away from the blower 32, and an external air cooling component 6 is also provided between the winding component 5 and the extrusion die 31. The feeding component 2 includes a plurality of feeding units 21, and the plurality of feeding units 21 are connected in parallel.

[0030] The operator puts a variety of raw materials into the smelting component 1, and the smelting component 1 melts the raw materials and stirs them evenly, and then conveys them to each feeding unit 21 of the feeding component 2. The feeding unit 21 pressurizes and conveys the molten raw materials to the material-distributing component 4, and the material-distributing component 4 feeds the raw materials into the extrusion flow channel 315 of the extrusion die 31. The material-distributing component 4 controls the flow rate of the raw materials. The molten raw materials pass through the extrusion flow channel 315 to form a film tube, and the operator guides the film tube away from the front end of the extrusion die 31 to enter the winding component 5; at this time, the front end of the film tube is closed under the action of the winding component 5, and the space inside the film tube formed by the blown film is connected to the blast channel 316. The blower 32 blows from the inside of the film tube through the blast channel 316, and the external air cooling component 6 blows air from the outside of the film tube to cool it. The blown film tube is cooled to form a finished film. The operator cuts off the unblown film tube at the front end, and starts the winding component 5 to pack the finished film into a film roll. The efficiency of feeding is improved by cooperating with the multiple feeding units 21 and the material distribution assembly 4, and the production efficiency of large-size films is improved. The added external air cooling assembly 6 improves the efficiency of film shaping, realizes fully automated film blowing, and improves film blowing efficiency.

[0031] Reference Figure 1 The smelting assembly 1 includes a plurality of smelting tanks 11, each of which is provided with a feed port and a discharge port, and each smelting tank 11 is connected to a feeding unit 21 through the discharge port. A stirring member driven by a motor is provided in the smelting tank 11. The feeding unit 21 is a screw feeder. In this embodiment, three screw feeders are provided according to the size of the film, and the number of the smelting tanks 11 is also provided to be three. The three feeding units 21 are arranged along the circumference of the extrusion die 31. The three feeding units 21 are all connected to the material equalization assembly 4.

[0032] The material distribution assembly 4 includes a storage barrel 41, which is arranged at the output end of the feeding unit 21, and all the feeding units 21 are connected to the storage barrel 41. A feed pipe 42 is connected to the storage barrel 41, and the feed pipe 42 is connected to the inside of the storage barrel 41. A diaphragm pump 44 is arranged above the storage barrel 41, and the input end of the diaphragm pump 44 is connected to the feed pipe 42. A discharge pipe 43 is installed at the output end of the diaphragm pump 44, and one end of the discharge pipe 43 away from the diaphragm pump 44 is connected to the extrusion die 31. Check valves are installed in both the feed pipe 42 and the discharge pipe 43.

[0033] The smelting tank 11 melts the raw materials, stirs them evenly, and then inputs them into the conveying unit. The conveying unit simultaneously injects the raw materials into the storage barrel 41, so that the raw materials in the storage barrel 41 remain full. The diaphragm pump 44 extracts the raw materials in the storage barrel 41 through the feed pipe 42, and injects the raw materials into the extrusion die 31 through the discharge pipe 43. The diaphragm pump 44 evenly supplies the raw materials to the extrusion die 31, realizes the uniform delivery of the raw materials, and reduces the occurrence of uneven feeding during the production of large-size films. In addition, multiple feeding units 21 feed the storage barrel 41 at the same time, and the raw materials in the storage barrel 41 are always in a full state, reducing the possibility of production suspension due to insufficient raw materials in a certain smelting barrel. Compared with the setting of a single feeding unit 21, the fault tolerance of the equipment is improved.

[0034] When raw materials need to be added, the operator can first suspend one feeding unit 21 and one smelting pot 11 to add materials, while the other feeding units 21 and smelting pots 11 continue production, thereby reducing the possibility of production suspension due to the addition of raw materials.

[0035] Reference Figure 2 and Figure 3 The extrusion die head 31 includes a die barrel 312, which is installed at the discharge end of the discharge pipe 43, and the die barrel 312 is threadedly connected to the pipe opening of the discharge pipe 43 on the discharge side. A core 311 is arranged in the die barrel 312, and a connecting column 314 is arranged on the outer peripheral wall of the core 311. The end of the connecting column 314 away from the core 311 is connected to the inner peripheral wall of the die barrel 312, and the die barrel 312, the core 311 and the connecting column 314 are integrally formed. The gap between the core 311 and the die barrel 312 is an extrusion flow channel 315, and the bottom end of the extrusion flow channel 315 is the feed side, and the feed side of the extrusion flow channel 315 is connected to the discharge pipe 43. The core 311 is hollow, and the connecting column 314 is hollow. An air blast channel 316 is arranged in the die barrel 312 and is connected to the connecting column 314 and the inner cavity of the core 311. The bottom end of the air blast channel 316 is the air inlet side, and the pipe of the blower 32 is installed on the end wall of the mold cylinder 312 close to the air inlet side of the air blast channel 316.

[0036] A flow divider 313 is provided at one end of the mold core 311 away from the blower 32, and the internal cavity of the flow divider 313 is connected to the blast channel 316. A plurality of through holes 3131 are provided on the outer peripheral wall of the flow divider 313, and the blast channel 316 is connected to the internal space of the film tube through the through holes 3131. A flow divider protrusion 3132 is also provided on the inner peripheral wall of the flow divider 313, which is used to even out the airflow ejected from the blast channel 316. A plurality of heating rings 317 are also sleeved on the outer side of the mold cylinder 312. In this embodiment, a total of ten heating rings 317 are provided, and the ten heating rings 317 are arranged in parallel along the axial direction of the mold core 311. The heating rings 317 are composed of electric heating wires.

[0037] After the raw material flows out of the discharge pipe 43, it enters the extrusion flow channel 315 and moves upward under the action of pressure to overcome gravity. During the movement, the heating ring 317 maintains the temperature of the mold cylinder 312 to prevent the molten raw material from solidifying due to the low temperature of the mold cylinder 312. The raw material is extruded at the discharge side of the extrusion flow channel 315 to form a film tube. The blower 32 injects air into the diverter cover 313 through the blowing channel 316. At this time, the direction of the air flow is vertically upward. The vertically upward air flow is guided by the diverter cover 313 to inject a uniform air flow into each through hole 3131, reducing the occurrence of uneven inflation of the film tube caused by the air flow blowing directly into the film tube.

[0038] Reference Figure 3 A pressure sensor 7 is provided outside the flow divider 313, and the pressure sensor 7 is installed on the top wall of the flow divider 313. The pressure sensor 7 is electrically connected to the controller, and the blower 32 is also electrically connected to the controller. The controller controls the blower 32 to work according to the change in the absolute pressure value of the gas in the film tube.

[0039] During inflation, the air pressure sensor 7 detects the change in the gas pressure value in the film tube in real time, and controls the flow unit and pressure unit of the input compressed air according to the signal value, and controls the operation of the blower 32. On the basis of stabilizing the film blowing and expansion production, the possibility of the film tube rupture caused by excessive air pressure in the film tube is reduced.

[0040] Reference Figure 1 , the winding assembly 5 is installed above the extrusion die 31 through a rack. The external air cooling assembly 6 includes an air ring 61, which is also installed on the rack. The air ring 61 is arranged between the extrusion die 31 and the winding assembly 5, and the air ring 61 is sleeved on the outside of the film tube. The air ring 61 is hollow and has an opening on the inner side. The cross-section of the air ring 61 is C-shaped, and the opening is arranged toward the film tube. A plurality of air ducts 62 are arranged on the outer side of the air ring 61. In the present embodiment, four air ducts 62 are arranged. The four air ducts 62 are arranged along the circumference of the air ring 61, and the air duct 62 is connected to the internal cavity of the air ring 61. The length direction of the air duct 62 is perpendicular to the tangent direction of the connection point between the air duct 62 and the air ring 61. A fan 63 is installed on the side of the air duct 62 away from the air ring 61, and the fan 63 is installed on the ground.

[0041] The fan 63 injects air into the multiple air ducts 62, and the air flow enters the air ring 61 along the tangent direction of the air ring 61 through the connection point between the air duct 62 and the air ring 61, forming a spiral air flow in the air ring 61. In addition to the air flow overflowing from the opening of the air ring 61, part of the air flow moves in a spiral in the air ring 61. The spiral air flow will not directly impact the film tube, but will only take away the heat near the film tube, reducing the occurrence of film deformation. Before the winding assembly 5 is wound, the film tube is cooled by the air flow, which speeds up the shaping efficiency of the film tube and improves the efficiency of large-size film production.

[0042] Reference Figure 1 A protective curtain 64 is also installed on the winding assembly 5, and the other end of the protective curtain 64 hangs on the ground. A notch is provided on the protective curtain 64 for the feeding unit 21 to pass through, and the protective curtain 64 makes the space around the extrusion die 31 and the film tube relatively closed.

[0043] The fan 63 draws air from the protective curtain 64 into the air ring 61. The airflow overflowing from the air ring 61 is still inside the protective curtain 64. The airflow circulates only within the protective curtain 64, reducing the possibility of dust in the external air entering the protective curtain 64 and adhering to the film tube.

[0044] The implementation principle of a high-efficiency film blowing machine in the embodiment of the present application is as follows: multiple melting tanks 11 convey molten raw materials to multiple feeding units 21, and multiple feeding units 21 maintain the raw materials in the storage barrel 41 in a full state. The diaphragm pump 44 injects raw materials at a uniform rate into the extrusion flow channel 315 to maintain the uniformity of extrusion. The blower 32 injects airflow into the diverter hood 313 through the blast channel 316, and the inflation airflow blows out an airflow with a uniform flow rate under the action of the diverter hood 313 to achieve uniform inflation of large-sized plastic films. The fan 63 forms a spiral airflow in the air ring 61 through the air duct 62, which speeds up the cooling speed without directly blowing the film tube. Improve the efficiency of feeding, extruding and cooling and shaping large-sized films.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-efficiency film blowing machine, characterized in that: The invention comprises a smelting component (1), wherein a feeding component (2) is arranged on one side of the smelting component (1), and a blow molding component (3) is arranged on the side of the feeding component (2) away from the smelting component (1), and the blow molding component (3) comprises an extrusion die (31) and a blower (32); a material distribution component (4) is arranged between the feeding component (2) and the extrusion die (31), and one end of the material distribution component (4) is connected to the blow molding component (3), and the other end is connected to the extrusion die (31); the feeding component (2) comprises a plurality of feeding units (21) connected in parallel; a winding component (5) is arranged on the side of the extrusion die (31) away from the blower (32), and an external air cooling component (6) is arranged between the winding component (5) and the extrusion die (31).

2. A high-efficiency film blowing machine according to claim 1, characterized in that: The feeding unit (21) is a screw feeder, and a plurality of the feeding units (21) are arranged along the circumference of the extrusion die head (31).

3. A high-efficiency film blowing machine according to claim 2, characterized in that: The smelting assembly (1) comprises a plurality of smelting tanks (11), each of which is provided with a feed port and a discharge port, and one of the smelting tanks (11) is connected to a feeding unit (21) via the discharge port; and a stirring element driven by a motor is arranged in the smelting tank (11).

4. A high-efficiency film blowing machine according to claim 2, characterized in that: The material distribution component (4) comprises a material storage barrel (41), a feed pipe (42), a discharge pipe (43) and a diaphragm pump (44); the output ends of the plurality of feeding units (21) are all connected to the material storage barrel (41); one end of the feed pipe (42) is connected to the material storage barrel (41), and the other end is connected to the diaphragm pump (44); one end of the discharge pipe (43) is connected to the diaphragm pump (44), and the other end is connected to the extrusion die (31).

5. A high-efficiency film blowing machine according to claim 4, characterized in that: The extrusion die head (31) comprises a mold core (311), a mold barrel (312) and a flow divider (313); the mold core (311) is arranged in the mold barrel (312); an extrusion flow channel (315) is arranged between the mold core (311) and the mold barrel (312); the discharge pipe (43) is installed on the end wall of the mold barrel (312) close to the feeding side of the extrusion flow channel (315); a connecting column (314) is arranged on the outer peripheral wall of the mold core (311); the end of the connecting column (314) away from the mold core (311) is connected to the inner peripheral wall of the mold barrel (312); the mold core (311) is hollow, the connecting column (314) is hollow, and the mold barrel (312) is hollow. A blast channel (316) is provided in the mold core (312) and is connected with the connecting column (314) and the internal cavity of the mold core (311); the blower (32) is installed on the end wall of the mold cylinder (312) close to the air inlet side of the blast channel (316); the diverter hood (313) is sleeved on the end of the mold core (311) away from the blower (32); a plurality of through holes (3131) are opened on the outer peripheral wall of the diverter hood (313); the blast channel (316) is connected with the through holes (3131); the diverter hood (313) is used for uniform inflation; a plurality of heating rings (317) are also sleeved on the outer side of the mold cylinder (312); the heating rings (317) are composed of electric heating wires.

6. A high-efficiency film blowing machine according to claim 1, characterized in that: The external air cooling component (6) comprises an air ring (61), an air duct (62) and a fan (63); the air ring (61) is arranged between the extrusion die head (31) and the winding component (5), and the air ring (61) is sleeved on the outside of the film tube; the air ring (61) is hollow and has an opening on the inside, and the cross-section of the air ring (61) is C-shaped; the air duct (62) is installed on the outside of the air ring (61), the number of the air ducts (62) is set to be multiple, and the multiple air ducts (62) are arranged along the circumference of the air ring (61), and the air duct (62) is connected to the internal cavity of the air ring (61); the length direction of the air duct (62) is perpendicular to the tangent direction of the connection point between the air duct (62) and the air ring (61); the fan (63) is installed at one end of the air duct (62) away from the air ring (61), and the fan (63) is connected to the multiple air ducts (62).

7. A high-efficiency film blowing machine according to claim 6, characterized in that: The external air cooling component (6) also includes a protective curtain (64), the top end of the protective curtain (64) is installed on the winding component (5), and the bottom end of the protective curtain (64) is set on the ground. The protective curtain (64) closes the space around the extrusion die head (31) and the film tube, and a notch is opened on the protective curtain (64) for the feeding unit (21) to pass through.

8. The high-efficiency film blowing machine according to claim 5, characterized in that: An air pressure sensor (7) is arranged outside the diverter hood (313), and the air pressure sensor (7) is installed on the top wall of the diverter hood (313); the air pressure sensor (7) is electrically connected to a controller, and the blower (32) is also electrically connected to the controller; the controller controls the operation of the blower (32) according to the change in the absolute pressure value of the gas in the film tube.

Images