CN114347449A

CN114347449A - Plastic film blowing and winding device

Info

Publication number: CN114347449A
Application number: CN202111611705.3A
Authority: CN
Inventors: 彭燕燕
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-04-15

Abstract

The invention discloses a plastic film blowing and winding device, which comprises a machine shell, wherein a blowing cavity is arranged in the machine shell, two cutting cavities which are bilaterally symmetrical are arranged in the lower end wall of the blowing cavity, a blowing mechanism, a cutting mechanism and a film winding mechanism are arranged in the machine shell, the blowing mechanism can blow and process plastic into a film, the cutting mechanism can cut the film, the film winding mechanism can wind the film and can switch winding shafts, molten plastic in the melting cavity is stirred through a rotatable stirring block arranged in the blowing mechanism, the plastic is prevented from being solidified, unqualified partial films are separated through a detection wheel which is arranged in the cutting mechanism and can pull and detect the film and a cutting knife which can cut the film, two winding shafts which are arranged in the winding mechanism and can respectively wind the qualified films and the unqualified films and a guide rod which can switch the winding position of the film, thereby realizing the separate storage of the qualified film and the unqualified film.

Description

Plastic film blowing and winding device

Technical Field

The application relates to the technical field of plastic processing, in particular to a plastic film blowing and winding device.

Background

The frequency of use of plastic products in people's daily life is higher and higher, and plastic products, like plastic bag etc. are usually made the bag by the bag machine system bag of inflation film manufacturing machine among the plastic packaging machinery, and current inflation film manufacturing machine melts the plastic pellet heating and blows into the film again, can appear blowing bad phenomenon at the blowing in-process, can only cut off the defective products and take out through the manual work now, and efficiency is lower, simultaneously also is not convenient to collect the defective products.

Disclosure of Invention

In order to solve the problems, the invention is realized by the following technical scheme:

a plastic film blowing and winding device comprises a machine shell, wherein a blowing cavity is arranged in the machine shell, a melting cavity is arranged in the upper end wall of the blowing cavity, a blowing cavity is arranged in the right end wall of the blowing cavity, a meshing cavity is arranged in the rear end wall of the blowing cavity, an upper end opening feeding port is arranged in the upper end wall of the melting cavity, a stirring cavity is arranged in the right end wall of the melting cavity, two bilaterally symmetrical cutting cavities are arranged in the lower end wall of the blowing cavity, a winding cavity is arranged in the lower end wall of the two cutting cavities, the winding cavity is communicated with the blowing cavity, two bilaterally symmetrical detectors are fixedly connected to the upper end wall of the winding cavity, the detectors can detect the thickness of a film wound on a winding shaft, a transmission cavity is arranged in the rear end wall of the winding cavity, a blowing mechanism, a cutting mechanism and a film winding mechanism are arranged in the machine shell, and the blowing mechanism can blow and process plastic into the film, the cutting mechanism can cut the film, and the film winding mechanism can wind the film and can switch the winding shaft.

The blowing mechanism comprises two symmetrical fixed blocks fixedly connected with the upper end wall and the lower end wall of the blowing cavity, the two fixed blocks are fixedly connected with a cooling motor, the cooling motor is in power connection with a rotating shaft, the rotating shaft is fixedly connected with a fan, the fan can blow external cold air into the blow molding cavity, the blown film is convenient to cool, the rotating shaft is fixedly connected with a driving wheel, the right end wall of the stirring cavity is rotatably connected with a stirring shaft with one end positioned in the melting cavity, the stirring shaft is fixedly connected with a belt pulley positioned in the stirring cavity, a belt is connected between the belt pulley and the driving wheel, the stirring shaft is fixedly connected with a stirring block positioned in the melting cavity, the plastic melted in the melting cavity can be stirred to prevent solidification, the blow molding machine is arranged in the lower end wall of the melting cavity, and can blow the melted plastic in the melting cavity into a film and discharge the film into the blowing cavity.

Preferably, the cutting mechanism comprises a rotating motor fixedly connected with the rear end wall of the meshing cavity, the rotating motor is in power connection with a driving shaft with one end positioned in the blow molding cavity, the rear end wall of the meshing cavity is in rotation connection with a meshing shaft with one end positioned in the blow molding cavity, the meshing shaft and the driving shaft are respectively and fixedly connected with two meshing wheels positioned in the meshing cavity, the two meshing wheels are meshed with each other, the meshing shaft and the driving shaft are respectively and fixedly connected with detection wheels positioned in the blow molding cavity, the detection wheels can detect whether a film meets requirements, a reciprocating block is connected in the cutting cavity in a sliding manner, a reciprocating cavity with an opening at the rear end is arranged in the reciprocating block, the upper end wall and the lower end wall of the reciprocating cavity are fixedly connected with two symmetrical racks, the rear end wall of the cutting cavity is fixedly connected with a cutting motor, and the cutting motor is in power connection with a cutting shaft with one end positioned in the reciprocating cavity, the cutting shaft is fixedly connected with an incomplete gear located in the reciprocating cavity, the incomplete gear can be meshed with the rack, one end, close to one side end wall of the symmetric center, of the reciprocating block is fixedly connected with one end located on the blowing cavity and the cutting knife located at the communication position of the winding cavity, and the cutting knife can cut off the film.

Preferably, the film rolling mechanism comprises a power motor arranged in the rear end wall of the transmission cavity, the power motor is in power connection with a power shaft penetrating the transmission cavity, one end of the power shaft is located in the rolling cavity, the power shaft is fixedly connected with a fixed plate located in the transmission cavity, the left end wall and the right end wall of the fixed plate are fixedly connected with two symmetrical electromagnets, the power shaft is in sliding connection with a sliding wheel located in the transmission cavity, an elastic spring is connected between the sliding wheel and the fixed plate, the rear end wall of the transmission cavity is in rotating connection with two rotating shafts which are bilaterally symmetrical, the two rotating shafts are respectively and fixedly connected with a contact wheel and a selector wheel which are located in the transmission cavity, the selector wheel and the contact wheel can be in contact with the sliding wheel, the rotating shafts are fixedly connected with a rotating block located in the rolling cavity, and a threaded cavity is arranged in the rotating block, the wall of the left end of the threaded cavity is internally provided with a driving motor which is fixedly connected with a bidirectional threaded shaft penetrating through the threaded cavity, the threaded cavity is internally connected with two threaded blocks which are bilaterally symmetrical in a sliding manner, the threaded blocks are in threaded connection with the bidirectional threaded shaft, the threads of the two threaded blocks are opposite in rotating direction, the threaded blocks are fixedly connected with a telescopic motor, the telescopic motor is in power connection with a telescopic shaft of which one end is positioned in the rolling cavity, the telescopic motor is fixedly connected with an adsorption rod which is connected with an air extractor, the adsorption rod is provided with a plurality of air suction holes capable of adsorbing and fixing a film, the rotating block is fixedly connected with a rolling shaft capable of winding the film, the power shaft is fixedly connected with a guide block which is positioned in the rolling cavity, six buffer cavities which are centrosymmetric are used in the guide block, and one end of the guide rod which is positioned in the rolling cavity is in a sliding manner, and a buffer spring is connected between the guide rod and the end wall of the buffer cavity.

The invention provides a plastic film blowing and winding device which has the following beneficial effects: the invention discloses a film cooling device, which comprises a blowing mechanism, a fan, a cutting mechanism, a winding mechanism, a film winding mechanism and a guide rod, wherein the blowing mechanism is arranged, the rotating stirring block is arranged in the blowing mechanism, so that molten plastic in a melting cavity is stirred, the plastic is prevented from being solidified, and the fan can suck external cold air into the blowing cavity, so that the film cooling efficiency is ensured.

Drawings

FIG. 1 is a three-dimensional schematic view of a plastic film blowing and winding device of the invention;

FIG. 2 is a schematic view of the internal structure of a plastic film blowing and winding device of the present invention;

FIG. 3 is a schematic view of the structure of FIG. 2 taken at A-A;

FIG. 4 is a schematic view of the structure of FIG. 2 at B-B in accordance with the present invention;

FIG. 5 is a schematic view of the structure of FIG. 2 at C-C in accordance with the present invention;

fig. 6 is an enlarged view of a portion of fig. 2 of the present invention.

Detailed Description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, the present invention provides a technical solution: the utility model provides a plastics blown film coiling mechanism, includes casing 10, be equipped with blowing chamber 15 in the casing 10, be equipped with in the blowing chamber 15 upper end wall and melt chamber 12, be equipped with blowing chamber 14 in the blowing chamber 15 right-hand member wall, be equipped with meshing chamber 21 in the blowing chamber 15 rear end wall, it is equipped with upper end open-ended pan feeding mouth 11 in the chamber 12 upper end wall to melt, it is equipped with stirring chamber 13 in the chamber 12 right-hand member wall to melt, two of bilateral symmetry cut off chamber 16, two are equipped with rolling chamber 17 in the chamber 16 lower extreme wall in the blowing chamber 15, rolling chamber 17 with blowing chamber 15 intercommunication, rolling chamber 17 upper end wall fixedly connected with two bilateral symmetry's detector 36, detector 36 can detect the thickness of the film of coiling on rolling axle 37, be equipped with transmission chamber 18 in the rolling chamber 17 rear end wall, be equipped with blowing mechanism 71 in the casing 10, A cutting mechanism 72 and a film winding mechanism 73, wherein the blowing mechanism 71 can blow-mold the plastic into a film, the cutting mechanism 72 can cut the film, and the film winding mechanism 73 can wind the film and can switch the winding shaft.

The blowing mechanism 71 comprises two symmetrical fixed blocks 20 and two fixed blocks 20, wherein the two symmetrical fixed blocks 20 are fixedly connected with the upper end wall and the lower end wall of the blowing cavity 14, the two fixed blocks 20 are fixedly connected with a cooling motor 19, the cooling motor 19 is in power connection with a rotating shaft 23, the rotating shaft 23 is fixedly connected with a fan 22, the fan 22 can blow in external cold air into the blowing cavity 15, so that blown film cooling is facilitated, the rotating shaft 23 is fixedly connected with a driving wheel 31, the right end wall of the stirring cavity 13 is rotatably connected with a stirring shaft 26, one end of which is positioned in the melting cavity 12, the stirring shaft 26 is fixedly connected with a belt pulley 25 in the stirring cavity 13, the belt pulley 25 is connected with the driving wheel 31, the stirring shaft 26 is fixedly connected with a stirring block 27 in the melting cavity 12, 6 can stir and melt plastics in the melting cavity 12 to prevent solidification, the lower end wall of the melting cavity 12 is internally provided with a blow molding machine 28, the melted plastic in the melting cavity 12 can be blown into a film shape and discharged into the blowing cavity 15, and the dynamic cooling motor 19 outputs power so as to drive the rotating shaft 23 to rotate and drive the fan 22 to rotate, so that the outside cold air is blown into the blowing cavity 15, and the film cooling is facilitated.

Wherein, the cutting mechanism 72 includes a rotating motor 35 fixedly connected to the rear end wall of the meshing cavity 21, the rotating motor 35 is power-connected to a driving shaft 65 having one end located in the blowing cavity 15, the rear end wall of the meshing cavity 21 is rotatably connected to a meshing shaft 33 having one end located in the blowing cavity 15, the meshing shaft 33 and the driving shaft 65 are respectively and fixedly connected to two meshing wheels 34 located in the meshing cavity 21, the two meshing wheels 34 are meshed with each other, the meshing shaft 33 and the driving shaft 65 are respectively and fixedly connected to a detection wheel 29 located in the blowing cavity 15, the detection wheel 29 can detect whether the film meets the requirement, the cutting cavity 16 is internally and slidably connected with a reciprocating block 62, a reciprocating cavity 63 with an opening at the rear end is arranged in the reciprocating block 62, the upper and lower end walls of the reciprocating cavity 63 are fixedly connected to two symmetrical racks 32, and the rear end wall of the cutting cavity 16 is fixedly connected to a cutting motor 64, cut off motor 64 power connection and have one end to be located cutting off shaft 46 in the reciprocating chamber 63, cutting off shaft 46 fixedly connected with is located incomplete gear 42 in the reciprocating chamber 63, incomplete gear 42 can with rack 32 meshes, reciprocating block 62 is close to one side end wall fixedly connected with one end and is located blowing chamber 15 with the cutting off cutter 30 of rolling chamber 17 intercommunication department, cutting off cutter 30 can cut off the film, starts to cut off motor 64 output power, drives cutting off shaft 46 and rotates the round to drive incomplete gear 42 and rotate, thereby drive two reciprocating block 62 and move in opposite directions, thereby make cutting off cutter 30 cut off the film.

Wherein, the film rolling mechanism 73 comprises a power motor 43 arranged in the rear end wall of the transmission cavity 18, the power motor 43 is in power connection with a power shaft 44 penetrating through the transmission cavity 18 and having one end positioned in the rolling cavity 17, the power shaft 44 is fixedly connected with a fixing plate 50 positioned in the transmission cavity 18, the left and right end walls of the fixing plate 50 are fixedly connected with two symmetrical electromagnets 51, the power shaft 44 is in sliding connection with a sliding wheel 49 positioned in the transmission cavity 18, an elastic spring 52 is connected between the sliding wheel 49 and the fixing plate 50, the rear end wall of the transmission cavity 18 is rotatably connected with two rotating shafts 45 which are bilaterally symmetrical, the two rotating shafts 45 are respectively and fixedly connected with a contact wheel 48 and a selection wheel 47 positioned in the transmission cavity 18, the selection wheel 47 and the contact wheel 48 can be contacted with the sliding wheel 49, the rotating shaft 45 is fixedly connected with a rotating block 53 positioned in the rolling cavity 17, a thread cavity 54 is arranged in the rotating block 53, a driving motor 55 is arranged in the left end wall of the thread cavity 54, the driving motor 55 is fixedly connected with a bidirectional thread shaft 56 penetrating through the thread cavity 54, two thread blocks 57 which are bilaterally symmetrical are slidably connected in the thread cavity 54, the thread blocks 57 are in threaded connection with the bidirectional thread shaft 56, the thread turning directions of the two thread blocks 57 are opposite, the thread blocks 57 are fixedly connected with a telescopic motor 58, the telescopic motor 58 is in power connection with a telescopic shaft 59 of which one end is positioned in the rolling cavity 17, the telescopic motor 58 is fixedly connected with an adsorption rod 61, the adsorption rod 61 is connected with an air extractor 60, the adsorption rod 61 is provided with a plurality of air suction holes capable of adsorbing and fixing films, and the rotating block 53 is fixedly connected with a rolling shaft 37, the film can be convoluteed to rolling axle 37, power shaft 44 fixedly connected with is located guide block 38 in rolling chamber 17, use six cushion chamber 39 of central symmetry in the guide block 38, sliding connection has one end to be located in cushion chamber 39 guide bar 41 in rolling chamber 17, guide bar 41 with it is equipped with buffer spring 40 to connect between the cushion chamber 39 end wall, and when the film of coiling reached certain thickness on rolling axle 37, guide bar 41 contacted the film surface that rolling axle 37 was convoluteed, and guide bar 41 slides in cushion chamber 39, and buffer spring 40 plays the cushioning effect, prevents to crush the film of rolling axle 37 coiling.

The invention relates to a plastic film blowing and winding device, which comprises the following working procedures:

in the initial state, the two reciprocating blocks 62 are at the farthest positions, the incomplete gear 42 just contacts with the cutting knife 30, the sliding wheel 49 contacts with the selecting wheel 47, the elastic spring 52 is in the relaxed state, and the electromagnet 51 is not electrified.

When the blowing operation is performed, the cooling motor 19 is started to output power to drive the rotating shaft 23 to rotate, thereby driving the fan 22 to rotate, thereby blowing the outside cold air into the blowing cavity 15 to facilitate the cooling of the film, and simultaneously driving the driving wheel 31 to rotate, thereby driving the belt pulley 25 to rotate through the belt 24, thereby driving the stirring shaft 26 to rotate, thereby driving the stirring block 27 to rotate, thereby stirring and melting the melted plastic in the cavity 12 to prevent the melted plastic from solidifying, the blowing machine 28 blows the melted plastic in the cavity 12 into the film and discharges the film into the blowing cavity 15, the rotating motor 35 is started to output power to drive the driving shaft 65 to rotate, thereby driving the engaging wheel 34 to rotate, thereby driving the two detecting wheels 29 to rotate, thereby driving the film to move downwards and simultaneously detecting the film, which is discharged into the winding cavity 17, and the power motor 43 is started to output power, thereby driving the power shaft 44 to rotate, driving the guide block 38 to rotate, so as to push the film to the vicinity of the right winding shaft 37, driving the sliding wheel 49 to rotate while the power shaft 44 rotates, thereby driving the selector wheel 47 to rotate, thereby driving the right rotating shaft 45 to rotate, thereby driving the right rotating block 53 to rotate, thereby driving the winding shaft 37 to rotate, starting the air pump 60 so as to adsorb the film through the adsorption rod 61, stopping the air pump 60 while starting the telescopic motor 58 after the rotating block 53 rotates for one circle, thereby driving the adsorption rod 61 to leave the surface of the winding shaft 37, and at this time, the film is wound on the surface of the winding shaft 37 without falling;

when the detection wheel 29 detects that the film is unqualified, the cutting motor 64 is started to output power, so that the cutting shaft 46 is driven to rotate for one circle, the incomplete gear 42 is driven to rotate, the two reciprocating blocks 62 are driven to move oppositely, so that the cutting knife 30 cuts off the film, meanwhile, the electromagnet 51 is electrified, the power motor 43 reversely outputs power, so that the sliding wheel 49 is driven to move forwards, the elastic spring 52 is compressed, the sliding wheel 49 is driven to be in contact with the contact wheel 48, the left rotating shaft 45 is driven to rotate, the left rotating block 53 is driven to rotate, so that the unqualified product is wound on the left winding shaft 37, when the unqualified product is wound, the power motor 43 is driven to rotate forwards again, the electromagnet 51 is powered off, so that the right winding shaft 37 continues to wind the film, at the moment, the detector 36 detects the thickness of the wound film on the winding shaft 37, and the driving motor 55 is started to rotate, therefore, the two thread blocks 57 move backwards, the distance between the two adsorption rods 61 is adjusted, the telescopic motor 58 is started to enable the adsorption rods 61 to be in contact with the surface of the film wound by the winding shaft 37, the air pump 60 is started to enable the adsorption rods 61 to adsorb the film again, the film is continuously wound by the winding shaft 37 on the right side, when the film wound on the winding shaft 37 reaches a certain thickness, the guide rod 41 is in contact with the surface of the film wound by the winding shaft 37, the guide rod 41 slides in the buffer cavity 39, and the buffer spring 40 plays a role in buffering and prevents the film wound by the winding shaft 37 from being crushed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a plastics blown film coiling mechanism, includes casing (10), its characterized in that: be equipped with in casing (10) and blow mould chamber (15), it melts chamber (12) to be equipped with in blow mould chamber (15) upper end wall, be equipped with in blow mould chamber (15) right-hand member wall and blow wind chamber (14), be equipped with in blow mould chamber (15) rear end wall and mesh chamber (21), it is equipped with upper end open-ended pan feeding mouth (11) in chamber (12) upper end wall to melt, it is equipped with stirring chamber (13) in chamber (12) right-hand member wall to melt, be equipped with two of bilateral symmetry in blow mould chamber (15) lower extreme wall and cut off chamber (16), two be equipped with rolling chamber (17) in cutting off chamber (16) lower extreme wall, detector (36) of two bilateral symmetry of rolling chamber (17) upper end wall fixedly connected with, be equipped with transmission chamber (18) in rolling chamber (17) rear end wall, be equipped with in casing (10) blow moulding mechanism (71), cutting off mechanism (72), And a film winding mechanism (73), wherein the blow molding mechanism (71) can blow mold the plastic into a film, the cutting mechanism (72) can cut the film, and the film winding mechanism (73) can wind the film and can switch a winding shaft.

2. The plastic film blowing and winding device as claimed in claim 1, wherein: blow molding machine constructs (71) and includes fixed block (20) of two symmetries of end wall fixed connection about blowing chamber (14), two fixed block (20) fixedly connected with cooling motor (19), cooling motor (19) power connection has rotation axis (23), rotation axis (23) fixedly connected with fan (22), fan (22) can blow in external cold air in blowing chamber (15), make things convenient for the blown film cooling, rotation axis (23) fixedly connected with action wheel (31), stirring chamber (13) right-hand member wall rotates and is connected with one end and is located melt (mixing) shaft (26) in chamber (12), (mixing) shaft (26) fixedly connected with is located belt pulley (25) in stirring chamber (13), belt pulley (25) with it is equipped with belt (24) to connect between action wheel (31), mixing shaft (26) fixedly connected with is located melt stirring block (27) in chamber (12), a blow molding machine (28) is arranged in the lower end wall of the melting cavity (12).

3. The plastic film blowing and winding device as claimed in claim 1, wherein: the cutting mechanism (72) comprises a rotating motor (35) fixedly connected with the rear end wall of the meshing cavity (21), the rotating motor (35) is in power connection with a driving shaft (65) with one end located in the blowing cavity (15), the rear end wall of the meshing cavity (21) is in rotating connection with a meshing shaft (33) with one end located in the blowing cavity (15), the meshing shaft (33) and the driving shaft (65) are respectively and fixedly connected with two meshing wheels (34) located in the meshing cavity (21), the two meshing wheels (34) are mutually meshed, and the meshing shaft (33) and the driving shaft (65) are respectively and fixedly connected with detection wheels (29) located in the blowing cavity (15).

4. The plastic film blowing and winding device as claimed in claim 1, wherein: a reciprocating block (62) is connected in the cutting cavity (16) in a sliding way, a reciprocating cavity (63) with an opening at the rear end is arranged in the reciprocating block (62), the upper end wall and the lower end wall of the reciprocating cavity (63) are fixedly connected with two symmetrical racks (32), a cutting motor (64) is fixedly connected with the rear end wall of the cutting cavity (16), the cutting motor (64) is in power connection with a cutting shaft (46) with one end positioned in the reciprocating cavity (63), the cutting shaft (46) is fixedly connected with an incomplete gear (42) positioned in the reciprocating cavity (63), incomplete gear (42) can with rack (32) meshing, reciprocating block (62) are close to one side end wall fixedly connected with one end of symmetry center and are located blowing chamber (15) with cutting off cutter (30) of rolling chamber (17) intercommunication department, cutting off cutter (30) can cut off the film.

5. The plastic film blowing and winding device as claimed in claim 1, wherein: roll up membrane mechanism (73) and include power motor (43) that are equipped with in transmission chamber (18) rear end wall, power motor (43) power connection has and runs through transmission chamber (18) and one end are located power shaft (44) in rolling chamber (17), power shaft (44) fixedly connected with is located fixed plate (50) in transmission chamber (18), two electro-magnets (51) of end wall fixedly connected with symmetry about fixed plate (50).

6. A plastic blown film take-up device according to claim 5, characterised in that: the power shaft (44) is connected with a sliding wheel (49) positioned in the transmission cavity (18) in a sliding way, an elastic spring (52) is connected between the sliding wheel (49) and the fixed plate (50), the rear end wall of the transmission cavity (18) is rotationally connected with two rotation shafts (45) which are bilaterally symmetrical, the two rotation shafts (45) are respectively and fixedly connected with a contact wheel (48) and a selection wheel (47) which are positioned in the transmission cavity (18), the selector wheel (47), the contact wheel (48) being capable of contacting the sliding wheel (49), the rotating shaft (45) is fixedly connected with a rotating block (53) positioned in the rolling cavity (17), a thread cavity (54) is arranged in the rotating block (53), a driving motor (55) is arranged in the left end wall of the thread cavity (54), the driving motor (55) is fixedly connected with a bidirectional threaded shaft (56) penetrating through the threaded cavity (54).

7. The plastic film blowing and winding device as claimed in claim 6, wherein: two thread blocks (57) of sliding connection bilateral symmetry in the thread cavity (54), the thread block (57) with two-way threaded shaft (56) threaded connection, two thread blocks (57) screw to opposite, thread block (57) fixed connection telescopic motor (58), telescopic motor (58) power connection has one end to be located telescopic shaft (59) in rolling cavity (17), telescopic motor (58) fixedly connected with adsorbs pole (61), it is connected with air extractor (60) to adsorb pole (61), be equipped with a plurality of suction holes on adsorbing pole (61), can adsorb fixed film, turning block (53) fixedly connected with rolling axle (37), rolling axle (37) can coil the film, power axle (44) fixedly connected with is located guide block (38) in rolling cavity (17), use six cushion cavities (39) of central symmetry in guide block (38), buffer chamber (39) sliding connection has one end to be located guide bar (41) in rolling chamber (17), guide bar (41) with it is equipped with buffer spring (40) to connect between buffer chamber (39) end wall.