CN111844707A

CN111844707A - Blown film unit

Info

Publication number: CN111844707A
Application number: CN202010730200.8A
Authority: CN
Inventors: 张红; 张斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2020-10-30

Abstract

The invention relates to the field of plastic film manufacturing, in particular to a blown film unit, which comprises a base, wherein two sides of the upper surface of the base are fixedly connected with side plates, the upper surface of the base is fixedly connected with a film blowing mechanism, the upper surface of the film blowing mechanism is fixedly connected with a spreading mechanism, the upper end of one side of each of the two side plates is provided with an extruding mechanism, the supporting circular plate is supported by the arranged supporting rods, four threaded rods are supported by four threaded holes in the supporting circular plate, four arc-shaped push plates are supported by the four threaded rods and support the same rubber scraping ring, the annular film is sleeved on the surface of the rubber scraping ring, the annular film is spread by the rubber scraping ring, the phenomenon that the annular film cannot be spread by gas due to the volume change of gas driven by the change of temperature is prevented, and further wrinkles are prevented from existing on the surface of a plastic film manufactured after flattening, the produced plastic film is prevented from being damaged due to the fact that the produced plastic film has defects and cannot be sold.

Description

Blown film unit

Technical Field

The invention relates to the field of plastic film manufacturing, in particular to a blown film unit.

Background

The film blow molding, also called flat folding film tube extrusion molding or blown film extrusion molding, is a main method for producing plastic film, and is characterized by that the plastic is added into an extruder, and is extruded into the form of cylinder from the ring gap of front end die after it is melted, and the cylinder is blown into the form of bubble tube by means of introducing compressed air from central hole of core rod of machine head, and at this time, the longitudinal and transverse directions are extended to obtain bubble tube with a certain blow-up multiple, and then cooled by means of external air ring, and fed into guide clamping plate and traction clamping roller to flatten the bubble tube, so that the air in the bubble tube can be prevented from leaking out to maintain required constant blow-up pressure, and the flattened bubble tube can be formed into flat folding double-layer film, and finally fed.

The existing blow molding film machine supports the annular film through gas, but because the extension degrees of the plastic films configured by different materials can have differences, and then when the film blow molding is carried out on different plastics, in order to better support the plastic cylinder, the accurate control needs to be carried out on the introduced gas, if the introduced gas is too much, the annular film can be broken, if the input gas is less, the annular film can not be spread, and because the temperature inside the annular film changes, the volume of the gas can be continuously changed, and further the annular film can not be effectively spread, the flattened plastic film is wrinkled, and further the produced plastic film has defects, so that the plastic film can not be sold and loss is caused.

Disclosure of Invention

The invention provides a blow molding film machine set, which aims to solve the problems that in the prior art, an annular film is supported by gas, but because the extension degrees of plastic films configured by different materials are different, and further, when different plastics are subjected to film blowing, in order to better support a plastic cylinder, the introduced gas needs to be accurately controlled, if the introduced gas is excessive, the annular film is broken, if the introduced gas is less, the annular film cannot be supported, and because the temperature inside the annular film changes, the volume of the gas can be continuously changed, the annular film cannot be effectively supported, the flattened plastic film is wrinkled, and further, the produced plastic film has flaws and cannot be sold, so that loss is caused.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a blown film unit, includes the base, the equal fixedly connected with curb plate in upper surface both sides of base, the last fixed surface of base is connected with blown film mechanism, fixedly connected with struts the mechanism on blown film mechanism's the upper surface, two the upper end of one side of curb plate is provided with extrusion mechanism, two the one end of curb plate is provided with winding mechanism, the upper end of strut the mechanism is provided with drive mechanism, two the inside fixedly connected with cooling body of curb plate.

Specifically, the blown film mechanism is including going out the membrane machine, going out the membrane seat, go out membrane mouth, annular membrane, it is on the upper surface of base to go out membrane machine fixed connection, the upper end fixedly connected with that goes out the membrane machine goes out the membrane seat, the membrane mouth has been seted up on the upper surface of going out the membrane seat, the annular membrane has been cup jointed to the inside of going out the membrane mouth.

Specifically, it includes bracing piece, support plectane, rectangular hole, screw hole, threaded rod, first gear, first bearing, arc push pedal, rubber scraping ring, four to prop up the mechanism bracing piece fixed connection on going out the upper surface of membrane seat, four the same support plectane of upper end fixedly connected with of bracing piece, support plectane on the surface equidistance four rectangular holes have been seted up, four all set up threaded hole, four on one side lateral wall of the support plectane centre of a circle is kept away from to the rectangular hole the equal threaded connection in inside of screw hole has the threaded rod, four the threaded rod is located the first gear of the equal fixedly connected with in surface of the inside one end of rectangular hole, four the other end of threaded rod all rotates through first bearing and is connected with the arc push pedal, four arc push pedal equidistance fixed connection is on the inner wall.

Specifically, the extrusion mechanism comprises a first motor, a first driving shaft, a first milling drum, a second gear, a third gear, a second driving shaft and a second milling drum, the first motor is fixedly connected with the upper end of the side wall at one side of the side plate, the output end of the first motor is fixedly connected with a first driving shaft, two ends of the first driving shaft are respectively and rotatably connected with the inner parts of the two side plates, a first rolling cylinder is fixedly sleeved on the surface of the first driving shaft, a second gear is fixedly sleeved on the surface of the first driving shaft and meshed with a third gear, the third gear is fixedly sleeved on the surface of the second driving shaft, two ends of the second driving shaft are respectively and rotatably connected inside the two side plates, the surface of the second driving shaft is fixedly sleeved with a second rolling cylinder, and the surfaces of the first rolling cylinder and the second rolling cylinder are tightly attached.

Specifically, winding mechanism includes first bull stick, support rotary drum, second motor, second bull stick, receipts reel, the both ends of first bull stick are rotated respectively and are connected the inside at two curb plates, the fixed cover on the surface of first bull stick has been connect and has been supported the rotary drum, fixedly connected with second motor on one side lateral wall of curb plate, the output fixedly connected with second bull stick of affiliated second motor, the both ends of second bull stick are rotated respectively and are connected the inside at two curb plates, the fixed cover on the surface of second bull stick has been connected the receipts reel.

Specifically, drive mechanism includes second bearing, round bar, carousel, annular rack, rocker, the second bearing is fixed cup joints on the upper surface of supporting the plectane, the inside fixed cover of second bearing has cup jointed the round bar, the other end fixedly connected with carousel of round bar, fixedly connected with annular rack on the lower surface of carousel, the one end fixedly connected with rocker of carousel upper surface.

Specifically, cooling body includes solid fixed ring, annular basin, shower nozzle, inlet tube, gu fixed ring's both ends difference fixed connection is on the surface of two curb plates, gu fixed ring's inside has seted up the annular basin, gu a plurality of shower nozzles that are linked together with the annular basin of equidistance fixedly connected with on fixed ring's the inner wall, the inlet tube that fixedly connected with and annular basin communicate mutually on fixed ring's the outer wall.

Specifically, the activity of annular membrane cup joints on the surface of rubber scraping ring, the annular membrane advances to roll first and rolls between a section of thick bamboo and the second and roll with the surperficial laminating that supports the rotary drum, the one end winding of keeping away from the second of annular membrane rolls on the surface of winding drum.

Specifically, the annular rack is meshed with four first gears.

The invention has the beneficial effects that:

(1) according to the blown film unit, the supporting circular plate is supported by the supporting rods, the four threaded rods are supported by the four threaded holes in the supporting circular plate, the four arc-shaped push plates are supported by the four threaded rods, the four arc-shaped push plates support the same rubber scraping ring, the annular film is sleeved on the surface of the rubber scraping ring, the annular film is stretched by the rubber scraping ring, the phenomenon that the annular film cannot be stretched by gas due to the fact that the annular film cannot be stretched due to the fact that the gas volume changes caused by the temperature changes is prevented, further, wrinkles exist on the surface of a plastic film manufactured after flattening, and the fact that the produced plastic film cannot be sold due to flaws is prevented.

(2) According to the blown film unit, the rocker is arranged to drive the rotary table to rotate, the rotary table drives the annular rack on the lower surface to rotate when rotating, the annular rack drives the four first gears which are meshed with each other to rotate, the four first gears drive the four threaded rods to rotate, and when the four threaded rods rotate, the threads on the surface extrude the threads on the inner wall of the threaded hole, so that the four threaded rods synchronously move, the four arc-shaped push plates are further pushed to synchronously move, the diameter of the rubber scraping ring can be adjusted, the size for stretching the annular film can be changed according to the requirement of plastics, and the problem that when the annular film is stretched by gas, the plastic film is affected due to the fact that the gas introduction amount is inconvenient to control is effectively solved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of a blown film unit according to the present invention;

FIG. 2 is a schematic top view of a blown film unit according to the present invention;

FIG. 3 is a schematic side view of a blown film unit according to the present invention;

FIG. 4 is a schematic structural diagram of a stretching mechanism of a blown film unit provided by the invention;

FIG. 5 is a top view of a stretch-open mechanism of a blown film unit according to the present invention;

FIG. 6 is a schematic structural view of a supporting circular plate of a blown film unit according to the present invention;

FIG. 7 is an enlarged view of a portion A of FIG. 4 of a blown film unit according to the present invention;

fig. 8 is a sectional view of a fixing ring of a blown film unit according to the present invention.

In the figure: 1. a base; 2. a side plate; 3. a film blowing mechanism; 31. film discharging; 32. a film outlet seat; 33. a film outlet; 34. an annular membrane; 4. a distraction mechanism; 41. a support bar; 42. a supporting circular plate; 43. a rectangular hole; 44. a threaded hole; 45. a threaded rod; 46. a first gear; 47. a first bearing; 48. an arc-shaped push plate; 49. a rubber scraping ring; 5. an extrusion mechanism; 51. a first motor; 52. a first drive shaft; 53. a first milling drum; 54. a second gear; 55. a third gear; 56. a second drive shaft; 57. a second milling drum; 6. a winding mechanism; 61. a first rotating lever; 62. supporting the drum; 63. a second motor; 64. a second rotating rod; 65. winding the roll; 7. a transmission mechanism; 71. a second bearing; 72. a round bar; 73. a turntable; 74. an annular rack; 75. a rocker; 8. a cooling mechanism; 81. a fixing ring; 82. an annular water tank; 83. a spray head; 84. and (4) a water inlet pipe.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1-8, the blown film unit of the present invention includes a base 1, two sides of an upper surface of the base 1 are fixedly connected with side plates 2, the upper surface of the base 1 is fixedly connected with a film blowing mechanism 3, the upper surface of the film blowing mechanism 3 is fixedly connected with a stretching mechanism 4, the upper end of one side of each of the two side plates 2 is provided with an extruding mechanism 5, one end of each of the two side plates 2 is provided with a winding mechanism 6, the upper end of the stretching mechanism 4 is provided with a transmission mechanism 7, the interior of each of the two side plates 2 is fixedly connected with a cooling mechanism 8, the film blowing mechanism 3 includes a film outlet 31, a film outlet and an annular film, the film outlet 31 is fixedly connected to the upper surface of the base 1, the upper end of the film outlet 31 is fixedly connected with a film outlet 32, the upper surface of the film outlet 32 is provided with a film outlet 33, the interior of the film outlet 33 is sleeved with, A supporting circular plate 42, rectangular holes 43, threaded holes 44, threaded rods 45, a first gear 46, a first bearing 47, an arc-shaped push plate 48 and a rubber scraping ring 49, wherein the four supporting rods 41 are fixedly connected to the upper surface of the film outlet seat 32, the upper ends of the four supporting rods 41 are fixedly connected with the same supporting circular plate 42, four rectangular holes 43 are equidistantly formed in the surface of the supporting circular plate 42, threaded holes 44 are respectively formed in the side walls of the four rectangular holes 43 far away from the circle center of the supporting circular plate 42, the threaded rods 45 are respectively and uniformly in threaded connection with the insides of the four threaded holes 44, the first gear 46 is respectively and fixedly connected to the surface of one end of each of the four threaded rods 45 positioned in the rectangular hole 43, the other ends of the four threaded rods 45 are respectively and rotatably connected with the arc-shaped push plate 48 through the first bearing 47, the four arc-shaped push plates 48 are fixedly connected, the screw thread on surface extrudees the screw thread on the screw hole 44 inner wall when four threaded rods 45 rotate, and then makes four threaded rods 45 remove in screw hole 44 is inside in step, and then promotes four arc push pedal 48 synchronous motion through four threaded rods 45, promotes the inner wall of rubber scraping ring 49 through four arc push pedal 48, and then can adjust the diameter of rubber scraping ring 49.

Specifically, the extrusion mechanism 5 includes a first motor 51, a first driving shaft 52, a first milling drum 53, a second gear 54, a third gear 55, a second driving shaft 56, and a second milling drum 57, the first motor 51 is fixedly connected to the upper end of the side wall of one side of the side plate 2, the output end of the first motor 51 is fixedly connected to the first driving shaft 52, the two ends of the first driving shaft 52 are respectively rotatably connected to the inside of the two side plates 2, the first milling drum 53 is fixedly sleeved on the surface of the first driving shaft 52, the second gear 54 is meshed with the third gear 55, the third gear 55 is fixedly sleeved on the surface of the second driving shaft 56, the two ends of the second driving shaft 56 are respectively rotatably connected to the inside of the two side plates 2, the second milling drum 57 is fixedly sleeved on the surface of the second driving shaft 56, the surfaces of the first milling drum 53 and the second milling drum 57 are tightly attached, the first motor 51 is started, the first driving shaft 52 is driven to rotate through the first motor 51, the first driving shaft 52 drives the second gear 54 to rotate, the second gear 54 drives the third gear 55 to reversely rotate, the third gear 55 drives the second driving shaft 56 to reversely rotate, and then the first rolling cylinder 53 and the second rolling cylinder 57 are driven to reversely rotate mutually through the first driving shaft 52 and the second driving shaft 56, so that the annular film 34 is extruded.

Specifically, the winding mechanism 6 includes a first rotating rod 61, a supporting drum 62, a second motor 63, a second rotating rod 64 and a winding drum 65, two ends of the first rotating rod 61 are respectively connected to the inside of the two side plates 2 in a rotating manner, the supporting drum 62 is fixedly sleeved on the surface of the first rotating rod 61, the second motor 63 is fixedly connected to one side wall of each side plate 2, the second rotating rod 64 is fixedly connected to an output end of the second motor 63, two ends of the second rotating rod 64 are respectively connected to the inside of the two side plates 2 in a rotating manner, the winding drum 65 is fixedly sleeved on the surface of the second rotating rod 64, the second motor 63 is started, the second rotating rod 64 is driven by the second motor 63 to rotate, the winding drum 65 is driven by the second rotating rod 64 to rotate, and the flattened plastic film is wound by the winding drum 6.

Specifically, the transmission mechanism 7 includes a second bearing 71, a round rod 72, a rotary disk 73, an annular rack 74 and a rocker 75, the second bearing 71 is fixedly sleeved on the upper surface of the supporting circular plate 42, the round rod 72 is fixedly sleeved inside the second bearing 71, the other end of the round rod 72 is fixedly connected with the rotary disk 73, the annular rack 74 is fixedly connected on the lower surface of the rotary disk 73, the rocker 75 is fixedly connected at one end of the upper surface of the rotary disk 73, the rotary disk 73 is driven to rotate around the round rod 72 by rotating the rocker 75, the annular rack 74 on the lower surface is driven to rotate when the circular disk 73 rotates, and the annular rack 74 drives four first gears 46 which are meshed with each other to synchronously rotate.

Specifically, cooling body 8 is including solid fixed ring 81, annular basin 82, shower nozzle 83, inlet tube 84, gu fixed ring 81's both ends difference fixed connection is on two curb plates 2's surface, gu fixed ring 81's inside has seted up annular basin 82, gu a plurality of shower nozzles 83 that are linked together with annular basin 82 of equidistance fixedly connected with on fixed ring 81's the inner wall, gu fixed ring 81's the outer wall on fixedly connected with and the inlet tube 84 that annular basin 82 is linked together, put through inlet tube 84 and outside water source, start-up shower nozzle 83, spray cold water through shower nozzle 83 to the surface of annular membrane 34 and cool down annular membrane 34.

Specifically, the annular membrane 34 is movably sleeved on the surface of the rubber scraper ring 49, the annular membrane 34 enters between the first rolling cylinder 53 and the second rolling cylinder 57 and is attached to the surface of the support rotating cylinder 62, one end, far away from the second rolling cylinder 57, of the annular membrane 34 is wound on the surface of the winding cylinder 65, the annular membrane 34 is stretched out through the rubber belt 49, the annular membrane 34 is extruded through the first rolling cylinder 53 and the second rolling cylinder 57, and the annular membrane 34 is wound through the winding cylinder 65.

Specifically, the annular rack 74 is engaged with the four first gears 46, and the annular rack 74 drives the four first gears 46 to rotate synchronously.

When the device is used, firstly, the rocker 75 is rotated to drive the turntable 73 to rotate around the round rod 72, the circular disc 73 is rotated to drive the annular rack 74 on the lower surface to rotate, the annular rack 74 drives the four meshed first gears 46 to synchronously rotate, the four first gears 46 drive the four threaded rods 45 to rotate, when the four threaded rods 45 rotate, the threads on the surfaces extrude the threads on the inner walls of the threaded holes 44, so that the four threaded rods 45 synchronously move inside the threaded holes 44, the four arc push plates 48 are pushed to synchronously move through the four threaded rods 45, the inner walls of the rubber scraping rings 49 are pushed through the four arc push plates 48, the diameter of the rubber scraping rings 49 can be adjusted, the size of the annular membrane 34 can be changed according to the requirement of a manufactured plastic film, the supporting round plate 42 is supported through the supporting rod 41, the four threaded holes 44 inside the supporting round plate 42 are used for supporting the four threaded rods 45, the four arc-shaped push plates 48 are supported by the four threaded rods 45, the four arc-shaped push plates 48 support the same rubber scraping ring 49, the annular film 34 is sleeved on the surface of the rubber scraping ring, the annular film 34 is stretched by the rubber scraping ring 49, the phenomenon that the annular film cannot be stretched due to the fact that gas is driven to change in volume due to the change in temperature is prevented, the surface of a plastic film which is made after flattening is prevented from being wrinkled, the problem that the produced plastic film cannot be sold due to flaws is prevented, the problem that the plastic film is affected due to the fact that the gas introduction amount is inconvenient to control when the annular film 34 is stretched is effectively solved, the film outlet machine 31 is started, the annular film 34 is blown out from the film outlet 33, the annular film 34 is sleeved on the surface of the rubber scraping ring 49, the annular film 34 smoothly passes through the first rolling cylinder 53 and the second rolling cylinder 57, and the annular film 34 is attached to the surface of the supporting rotary cylinder 62, finally, the end of the annular film 34 is wound clockwise on the surface of the take-up reel 65, the water inlet tube 84 is connected to an external water source, the spray head 83 is actuated, the annular membrane 34 is cooled by spraying cold water to the surface of the annular membrane 34 through the spray head 83, simultaneously, the first motor 51 is started, the first motor 51 drives the first driving shaft 52 to rotate, the first driving shaft 52 drives the second gear 54 to rotate, the second gear 54 drives the third gear 55 to rotate in the opposite direction, the third gear 55 drives the second driving shaft 56 to rotate in the opposite direction, the first and second milling drums 53 and 57 are further rotated in opposite directions to each other by the first and second drive shafts 52 and 56, then the annular membrane 34 is extruded, at the same time, the second motor 63 is started, the second rotating rod 64 is driven to rotate by the second motor 63, the second rotating lever 64 rotates the take-up drum 65, and the flattened plastic film is taken up by the take-up drum 6.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A blown film unit, comprising a base (1), characterized in that: the equal fixedly connected with curb plate (2) in upper surface both sides of base (1), the last fixed surface of base (1) is connected with blown film mechanism (3), fixedly connected with struts mechanism (4), two on the upper surface of blown film mechanism (3) the upper end of one side of curb plate (2) is provided with extrusion mechanism (5), two the one end of curb plate (2) is provided with winding mechanism (6), the upper end of strut mechanism (4) is provided with drive mechanism (7), two the inside fixedly connected with cooling body (8) of curb plate (2).

2. A blown film unit according to claim 1, wherein: blown film mechanism (3) are including going out membrane machine (31), going out membrane seat (), go out membrane mouth (), annular membrane (), go out membrane machine (31) fixed connection on the upper surface of base (1), the upper end fixedly connected with that goes out membrane machine (31) goes out membrane seat (32), go out membrane mouth (33) have been seted up on the upper surface of membrane seat (32), annular membrane (34) have been cup jointed to the inside of going out membrane mouth (33).

3. A blown film unit according to claim 1, wherein: the opening mechanism (4) comprises a supporting rod (41), a supporting circular plate (42), rectangular holes (43), threaded holes (44), threaded rods (45), a first gear (46), a first bearing (47), an arc-shaped push plate (48) and a rubber scraping ring (49), wherein the supporting rod (41) is fixedly connected to the upper surface of the film outlet seat (32), the four supporting rods (41) are fixedly connected to the same supporting circular plate (42) at the upper end, the supporting circular plate (42) is provided with four rectangular holes (43) at equal intervals on the surface, the four rectangular holes (43) are provided with threaded holes (44) on the side wall of one side far away from the circle center of the supporting circular plate (42), the threaded rods (45) are connected to the inner parts of the four threaded holes (44) in a threaded manner, and the first gear (46) is fixedly connected to the surface of one end of the threaded rods (45) positioned in the rectangular, four the other end of threaded rod (45) all rotates through first bearing (47) and is connected with arc push pedal (48), four arc push pedal (48) equidistance fixed connection is on the inner wall of same rubber scraping ring (49).

4. A blown film unit according to claim 1, wherein: the extrusion mechanism (5) comprises a first motor (51), a first driving shaft (52), a first rolling cylinder (53), a second gear (54), a third gear (55), a second driving shaft (56) and a second rolling cylinder (57), wherein the first motor (51) is fixedly connected to the upper end of the side wall of one side of each side plate (2), the first driving shaft (52) is fixedly connected to the output end of the first motor (51), the two ends of the first driving shaft (52) are respectively and rotatably connected to the insides of the two side plates (2), the first rolling cylinder (53) is fixedly sleeved on the surface of the first driving shaft (52), the second gear (54) is meshed with the third gear (55), and the third gear (55) is fixedly sleeved on the surface of the second driving shaft (56), the two ends of the second driving shaft (56) are respectively and rotatably connected to the inner parts of the two side plates (2), the surface of the second driving shaft (56) is fixedly sleeved with a second rolling cylinder (57), and the surfaces of the first rolling cylinder (53) and the second rolling cylinder (57) are tightly attached.

5. A blown film unit according to claim 1, wherein: winding mechanism (6) include first bull stick (61), support rotary drum (62), second motor (63), second bull stick (64), winding drum (65), the inside of connection at two curb plates (2) is rotated respectively at the both ends of first bull stick (61), the fixed support rotary drum (62) that has cup jointed on the surface of first bull stick (61), fixedly connected with second motor (63) on the lateral wall of one side of curb plate (2), output fixedly connected with second bull stick (64) of affiliated second motor (63), the inside of connection at two curb plates (2) is rotated respectively at the both ends of second bull stick (64), the fixed cover on the surface of second bull stick (64) has connect winding drum (65).

6. A blown film unit according to claim 1, wherein: drive mechanism (7) include second bearing (71), round bar (72), carousel (73), annular rack (74), rocker (75), fixed the cup jointing of second bearing (71) is on the upper surface of supporting plectane (42), round bar (72) have been cup jointed to the inside of second bearing (71) is fixed, the other end fixedly connected with carousel (73) of round bar (72), fixedly connected with annular rack (74) on the lower surface of carousel (73), the one end fixedly connected with rocker (75) of carousel (73) upper surface.

7. A blown film unit according to claim 1, wherein: cooling body (8) are including solid fixed ring (81), annular basin (82), shower nozzle (83), inlet tube (84), the both ends difference fixed connection of solid fixed ring (81) is on the surface of two curb plates (2), annular basin (82) have been seted up to the inside of solid fixed ring (81), shower nozzle (83) that equidistance fixedly connected with a plurality of and annular basin (82) are linked together on the inner wall of solid fixed ring (81), inlet tube (84) that fixedly connected with and annular basin (82) are linked together on the outer wall of solid fixed ring (81).

8. A blown film unit according to claim 2, wherein: the annular membrane (34) is movably sleeved on the surface of the rubber scraping ring (49), the annular membrane (34) enters between the first rolling cylinder (53) and the second rolling cylinder (57) to be attached to the surface of the supporting rotary cylinder (62), and one end, far away from the second rolling cylinder (57), of the annular membrane (34) is wound on the surface of the winding cylinder (65).

9. A blown film unit according to claim 6 wherein: the annular rack (74) is meshed with four first gears (46).