CN116985379A - Plastic bag easy-to-take-off film blowing machine capable of shaping - Google Patents

Abstract

The application relates to the technical field of blow molding machines, in particular to a plastic bag shaping and film-removing blow molding machine which comprises a support frame; a die mechanism; the stretching mechanism is used for stretching the film; the lifting mechanism is used for controlling the height of the stretching mechanism; the feeding mechanism is used for conveying the film; the blowing mechanism is used for controlling the discharging direction of the film and cooling the film; the feeding mechanism comprises a driving shaft, and a feeding roller is arranged on the driving shaft. This plastic bag that can design easily takes off membrane blowing machine through setting up elevating system, can drive stretching mechanism and rise, and stretching mechanism can be automatic carry out the centre gripping to the upper port of film and fix at the in-process that rises, stretches the film simultaneously, and after the film was pulled to a take the altitude, can be automatic with film upward movement through the feeding mechanism who sets up to blow the film to one side through blowing mechanism, make the smooth spreading of film, and fall from the support frame.

Description

Plastic bag easy-to-take-off film blowing machine capable of shaping

Technical Field

The application relates to the technical field of blow molding machines, in particular to a plastic bag shaping and film removing blow molding machine.

Background

The plastic bag is generally formed by blowing through a film blowing machine, the film blowing production line is characterized in that high-pressure plastic and low-pressure plastic are heated and extruded by an extruder and then are melted, compressed air is used for blowing the high-pressure plastic into a cylindrical film when the film is extruded by a die head, the upper end of the cylindrical film is clamped and rolled by a traction smooth roll and a traction rubber roll, and the film is lifted and conveyed to a winding device for winding, so that the production of the film is realized. In this initial stage, the upper end of the cylindrical film needs to be stretched and pulled manually, and after the film is stably demolded to a certain length, the film is connected to a winding device for winding.

At present, plastic film production lines can manufacture film cylinders with different diameters, and the traction mechanisms also have different heights correspondingly, so that in the process of producing large plastic films, a plurality of workers are often needed to cooperate at the same time to realize sealing and traction of the ports of the film cylinders, and the labor cost is large. Meanwhile, when a worker tightens up the port of the plastic film, the worker is contacted with hot air and waste heat on the film, so that a human body is easy to scald, and the worker also needs to climb up to butt the film with the traction mechanism, so that a certain danger exists. In addition, the quality of manual traction is difficult to guarantee, and the plastic film is possibly damaged by pulling, so that the efficiency is also difficult to improve. In view of this, we propose an easy-to-take-off film blowing machine for plastic bags that can be shaped.

Disclosure of Invention

The application aims to provide a plastic bag shaping and film-removing-easy blow molding machine which solves the problems in the background technology.

In order to achieve the above purpose, the present application provides the following technical solutions:

a plastic bag easy-to-take-off film blowing machine capable of shaping comprises a supporting frame; a die mechanism; the stretching mechanism is used for stretching the film; the lifting mechanism is used for controlling the height of the stretching mechanism; the feeding mechanism is used for conveying the film; the blowing mechanism is used for controlling the discharging direction of the film and cooling the film; the feeding mechanism comprises a driving shaft, and a feeding roller is arranged on the driving shaft.

Preferably, the stretching mechanism comprises a counterweight frame, and two pressing devices are symmetrically arranged on the counterweight frame; the pressing device comprises a fixing plate, the fixing plate is fixedly arranged on the counterweight frame, two swinging rods are rotatably arranged on the fixing plate, one end of each swinging rod, which is far away from the fixing plate, is rotatably connected with an outer frame, a heat sealing plate is slidably arranged on the inner wall of the outer frame, the heat sealing plate is elastically connected with the outer frame through a spring, and a rotating roller is rotatably arranged on the outer frame.

Preferably, the bottom fixedly connected with rack of heat-seal plate, the meshing has first gear on the rack, the axle center department fixedly connected with connecting rod of first gear, the connecting rod rotates to be installed on the frame, fixedly connected with swager roller on the connecting rod, the one end of connecting rod runs through the frame and fixedly connected with second gear.

Preferably, the bottom of the counterweight frame is elastically connected with a buffer block through a spring, and the bottom of the buffer block can be in contact with the rotating roller.

Preferably, the lifting mechanism comprises a lifting motor, the lifting motor is fixedly arranged on the supporting frame, the output end of the lifting motor is fixedly connected with a threaded rod, the threaded rod is rotatably arranged on the supporting frame, a driving frame is connected to the threaded rod in a threaded manner, the top of the driving frame is in contact with the rotating roller, and the driving frame is provided with a shaping device;

the inner wall of the driving frame is slidably provided with a guide shaft, the guide shaft is fixedly arranged on the supporting frame, and the counterweight frame is slidably arranged on the guide shaft.

Preferably, the shaping device comprises a sliding rod, the sliding rod is slidably mounted on the inner wall of the driving frame, one end of the sliding rod penetrates through the driving frame and is fixedly connected with a stop block, the stop block is elastically connected with the driving frame through a spring, the other end of the stop block is fixedly connected with a first arc-shaped strip, and the bottom of the first arc-shaped strip is elastically connected with a second arc-shaped strip through a spring.

Preferably, the feeding mechanism further comprises a mounting plate, the mounting plate is fixedly mounted on the supporting frame, the driving shafts are rotatably mounted on the mounting plate, the number of the driving shafts is two, driving gears are fixedly connected to the two driving shafts, the two driving gears are meshed, and one driving shaft is fixedly connected with a feeding motor.

Preferably, the mounting plate is fixedly connected with a mounting frame, the mounting frame is rotatably provided with a transmission shaft, the transmission shaft is in transmission connection with the driving shaft through a belt, and the transmission shaft is fixedly connected with a transmission gear.

Preferably, the blowing mechanism comprises a shell, the shell is fixedly mounted on the support frame, an air outlet and an air inlet are respectively formed in the shell, a baffle plate for shielding the air outlet is mounted on the surface of the shell in a rotating manner, the baffle plate is in elastic connection with the shell through a torsion spring, a fixing rod is fixedly connected to the inner wall of the shell, a baffle plate for shielding the air inlet is mounted on the fixing rod in a sliding manner, the baffle plate is in elastic connection with the shell through a spring, a gas plug plate is mounted on the fixing rod in a sliding manner, the surface of the gas plug plate is attached to the inner wall of the shell, and a driving device is arranged on the gas plug plate.

Preferably, the driving device comprises a connecting plate, the connecting plate is fixedly installed on one side, far away from the air outlet, of the air plug plate, a transmission arm is rotatably installed on the connecting plate, one end, far away from the connecting plate, of the transmission arm is rotatably installed with a rotating plate, a rotating rod is fixedly connected to the rotating plate, and the rotating rod is in transmission connection with the driving shaft through a belt.

By means of the technical scheme, the application provides the plastic bag easy-to-take-off blow molding machine capable of shaping. The method has at least the following beneficial effects:

(1) This plastic bag that can design easily takes off membrane blowing machine through setting up elevating system, can drive stretching mechanism and rise, stretching mechanism can be automatic carry out the centre gripping to the upper port of film fixedly at the in-process that rises, stretch the film simultaneously, after the film pulls certain altitude, can be automatic with film upward movement through the feeding mechanism who sets up, and blow the film to one side through blowing mechanism, make the smooth spreading of film, and fall from the support frame, whole process automatic operation need not the staff and climb the high operation, workman's work load has been alleviateed, its operational risk has also been reduced simultaneously.

(2) This plastic bag that can design easily takes off membrane blowing machine through setting up the hot shrouding, can heat the last port of film for plastic film top opening part hot melt bonds, seals and hardens, and the plastic film after the hardening more easily enters into between two feed rolls, has guaranteed that the feeding process can go on steadily, through setting up rack and first gear, when making feeding mechanism operate, can drive the automatic impaired frame that advances of hot-seal board, realizes automatic abdicating.

(3) This plastic bag that can design easily takes off membrane blowing machine through setting up buffer block and spring, can suitably cushion ascending power, avoids dragging plastic film, leads to the film to receive the damage, through setting up rotatable commentaries on classics roller, can turn into rolling friction with sliding friction to reduce its frictional force with the drive frame, when making the drive frame rise, drive the swinging arms more easily and swing, thereby make two heat-seal boards be close to each other.

(4) This plastic bag that can finalize the design easily takes off membrane blowing machine through setting up setting device, can finalize the design to plastic film for plastic film keeps the tube-shape steadily to rise, through setting up a plurality of second arc strips, can increase setting device's length, guarantees the design effect, and slide bar in the setting device can stretch out and draw back to one side, thereby changes the diameter of design in a certain limit, improves the suitability of device.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate and together with the description serve to explain a part of the application:

FIG. 1 is a schematic diagram of the overall structure of the present application;

FIG. 2 is a schematic view of a partial structure of the present application;

FIG. 3 is a schematic drawing of a stretching mechanism according to the present application;

FIG. 4 is an enlarged view of the structure of FIG. 3A in accordance with the present application;

FIG. 5 is a cross-sectional view of the outer frame of the present application;

FIG. 6 is a schematic view of a sizing device according to the present application;

FIG. 7 is a schematic view of a first arcuate strip and a second arcuate strip according to the present application;

FIG. 8 is a schematic view of a mounting plate according to the present application;

FIG. 9 is a schematic diagram of a feed mechanism according to the present application;

FIG. 10 is a schematic view of a torsion spring according to the present application;

FIG. 11 is a schematic view of a housing in accordance with the present application;

FIG. 12 is a cross-sectional view of a blower mechanism according to the present application;

fig. 13 is a schematic view of a support frame according to the present application.

In the figure: 1. a support frame; 2. a die mechanism; 3. a stretching mechanism; 31. a counterweight frame; 32. a fixing plate; 33. a swinging rod; 34. a rotating roller; 35. an outer frame; 36. a heat sealing plate; 37. a buffer block; 38. a connecting rod; 39. a material pressing roller; 310. a first gear; 311. a second gear; 312. a rack; 313. a limit rod; 4. a feeding mechanism; 41. a mounting plate; 42. a drive shaft; 43. a feed roller; 44. a drive gear; 45. a transmission shaft; 46. a transmission gear; 47. a feeding motor; 48. a mounting frame; 5. a blowing mechanism; 51. a housing; 511. an air outlet; 512. an air inlet; 52. a gas plug plate; 53. a baffle; 54. a driving device; 541. a connecting plate; 542. a transmission arm; 543. a rotating plate; 544. a rotating lever; 55. a baffle; 56. a fixed rod; 57. a torsion spring; 6. a lifting mechanism; 61. a lifting motor; 62. a drive frame; 63. a threaded rod; 64. a shaping device; 641. a slide bar; 642. a stop block; 643. a first arcuate strip; 644. a second arcuate strip; 65. and a guide shaft.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Referring to fig. 1 to 13, the present application provides a technical solution:

the utility model provides a plastic bag easy-to-take-off film blowing machine, includes the bottom plate, is provided with support frame 1 and bush mechanism 2 on the bottom plate. The support frame 1 is provided with a stretching mechanism 3, a feeding mechanism 4, a blowing mechanism 5 and a lifting mechanism 6. Wherein the stretching mechanism 3 is used for stretching the film; the lifting mechanism 6 is used for controlling the height of the stretching mechanism 3; the feeding mechanism 4 is used for conveying the film; the blowing mechanism 5 is used for controlling the discharging direction of the film and cooling the film.

When in use, the die mechanism 2 blows out the plastic film, and the plastic film rises in a cylinder shape under the wind. When the cylindrical film rises to a certain height, the lifting mechanism 6 is started, the lifting mechanism 6 drives the stretching mechanism 3 to move upwards, the stretching mechanism 3 clamps and fixes the upper port of the cylindrical film in the rising process and seals the upper port, and simultaneously stretches the film, so that the film is stably demoulded. When the upper port of the film rises to the feeding mechanism 4, the lifting mechanism 6 is suspended, and the feeding mechanism 4 is started. The feeding mechanism 4 conveys the film in the stretching mechanism 3 upward so that the film protrudes from the top end of the device, while the blowing mechanism 5 blows the film to the right side of the device so that the film falls from the right side. The blowing mechanism 5 can cool the film in the blowing process, and smooth the film through uniform wind flow, so that the film is uniformly spread, and the film is prevented from being accumulated above the device.

Specifically, the feeding mechanism 4 includes a mounting plate 41, the mounting plate 41 is fixedly mounted on the support frame 1, two driving shafts 42 are rotatably mounted on the mounting plate 41, and feeding rollers 43 are fixedly connected to the two driving shafts 42. The two driving shafts 42 are fixedly connected with driving gears 44, the two driving gears 44 are meshed, and one driving shaft 42 is fixedly connected with a feeding motor 47. When the feeding motor 47 rotates, the output end of the motor can directly drive a driving shaft 42 to rotate, the driving shaft 42 synchronously drives a driving gear 44 thereon to rotate, the driving gear 44 drives another driving gear 44 to synchronously rotate reversely through meshing, and further drives another driving shaft 42 to synchronously rotate reversely, so that the two feeding rollers 43 synchronously rotate reversely, and the film between the feeding rollers 43 is conveyed upwards. The mounting plate 41 is fixedly connected with a mounting frame 48, the mounting frame 48 is rotatably provided with two transmission shafts 45, the two transmission shafts 45 are respectively connected with the two driving shafts 42 in a transmission way through belts, and the two belts are in a cross shape, so that the rotation direction of the left driving shaft 42 is the same as that of the right driving shaft 45, and the rotation direction of the right driving shaft 42 is the same as that of the left driving shaft 45. The two transmission shafts 45 are fixedly connected with transmission gears 46, and the transmission gears 46 can be connected with the stretching mechanism 3.

In this embodiment, the stretching mechanism 3 includes a weight frame 31, and two pressing devices are disposed on the weight frame 31 and symmetrically disposed with respect to a center line of the weight frame 31 as a symmetry axis. Each pressing device comprises a fixing plate 32, the fixing plate 32 is fixedly arranged on the counterweight frame 31, two swinging rods 33 are rotatably arranged on the fixing plate 32, and one ends, far away from the fixing plate 32, of the two swinging rods 33 are rotatably connected with an outer frame 35. The two swinging rods 33 are parallel to each other, a parallelogram is formed between the two swinging rods 33, the fixing plate 32 and the outer frame 35, when the two swinging rods 33 swing simultaneously, the outer frame 35 can swing, and the outer frame 35 is prevented from tilting in the swinging process, and the vertical state is always kept. The inner wall of the outer frame 35 is slidably provided with a heat sealing plate 36, and resistance wires (not shown in the figure) are arranged in the heat sealing plate 36, and can generate heat after being electrified, so that the top opening of the plastic film is in hot melt adhesion, sealing and hardening are carried out, and the hardened plastic film is easier to enter between the two feeding rollers 43. And the heat-sealing plate 36 is elastically coupled to the outer frame 35 by a spring so that the heat-sealing plate 36 is contracted into the outer frame 35, thereby facilitating the continuous upward movement of the bottom film. The heat sealing plate 36 is fixedly connected with a limiting rod 313, and the limiting rod 313 is slidably connected with the inner wall of the outer frame 35 and used for limiting the heat sealing plate 36, so that the heat sealing plate 36 moves more stably.

Further, the bottom of the heat sealing plate 36 is fixedly connected with a rack 312, a first gear 310 is meshed with the rack 312, a connecting rod 38 is fixedly connected to the axle center of the first gear 310, the connecting rod 38 is rotatably mounted on the outer frame 35, a pressing roller 39 is fixedly connected to the connecting rod 38, one end of the connecting rod 38 penetrates through the outer frame 35 and is fixedly connected with a second gear 311, and when the second gear 311 rises to a designated position, the second gear 311 can be meshed with the transmission gear 46 and is driven by the transmission gear 46 to rotate. In the process of rotating the second gear 311, the first gear 310 is driven to rotate by the connecting rod 38, and the first gear 310 drives the heat sealing plate 36 to move towards the inside of the outer frame 35 by the rack 312, so as to realize automatic abdication. Meanwhile, the connecting rod 38 drives the material pressing roller 39 to rotate, and the film is conveyed upwards.

Further, a rotating roller 34 is rotatably installed on the upper side of the outer frame 35. The bottom of the counterweight frame 31 is elastically connected with a buffer block 37 through a spring, the bottom of the buffer block 37 can be contacted with the rotating roller 34, when the swinging rod 33 rotates to a horizontal state, the rotating roller 34 can be contacted with the bottom of the buffer block 37, and at the moment, if the rotating roller 34 moves upwards, the counterweight frame 31 and the outer frame 35 can be driven to synchronously move upwards. Through setting up the spring, can suitably cushion the power of rising, avoid pulling plastic film, lead to the film to receive the damage.

In this embodiment, the lifting mechanism 6 includes a lifting motor 61, the lifting motor 61 is fixedly mounted on the support frame 1, an output end of the lifting motor 61 is fixedly connected with a threaded rod 63, the threaded rod 63 is rotatably mounted on the support frame 1, a driving frame 62 is in threaded connection with the threaded rod 63, a guide shaft 65 is slidably mounted on an inner wall of the driving frame 62, and the guide shaft 65 is fixedly mounted on the support frame 1. The number of the guide shafts 65 is three, so that the rotation of the driving frame 62 is limited, and the threaded rod 63 can generate spiral transmission with the driving frame 62 and drive the driving frame 62 to move up and down when rotating. It should be noted that the surface of the guide shaft 65 is slidably connected to the inner wall of the weight frame 31, and is also used for guiding and limiting the weight frame 31.

Further, the top of the driving frame 62 contacts the roller 34, and when the driving frame 62 moves upwards, the roller 34 is driven to move. By weighting the weight frame 31, the whole force of the stretching mechanism 3 is larger than the force for swinging the swinging rod 33 and the outer frame 35, so that when the driving frame 62 moves upwards, the outer frame 35 and the swinging rod 33 can be driven to swing through the rotating roller 34, and the two heat sealing plates 36 move upwards and approach each other, so that the port of the tubular film is tightened. Through the rotary connection of the rotary roller 34 and the outer frame 35, when the driving frame 62 drives the outer frame 35 to move, the rotary roller 34 can roll on the driving frame 62 to change sliding friction into rolling friction so as to reduce friction force between the two.

Referring to fig. 6 and 7, a shaping device 64 is disposed on the driving frame 62 for shaping the plastic film, so that the plastic film keeps stably rising in a cylindrical shape. Specifically, the setting device 64 includes a sliding rod 641, the sliding rod 641 is slidably mounted on an inner wall of the driving frame 62, one end of the sliding rod 641 penetrates through the driving frame 62 and is fixedly connected with a stop 642, and the stop 642 is elastically connected with the driving frame 62 through a spring and is fixedly connected with a first arc-shaped strip 643. The number of the first arc-shaped strips 643 is four, the four first arc-shaped strips 643 are enclosed into a circle, and the first arc-shaped strips 643 can be properly stretched outwards through the arrangement of the stop block 642 and the spring, so that the applicability of the device is improved. The bottom of the first arc-shaped strip 643 is elastically connected with a second arc-shaped strip 644 through a spring. A telescopic sleeve is arranged between the second arc-shaped strip 644 and the first arc-shaped strip 643, and a spring is sleeved outside the telescopic sleeve to prevent the second arc-shaped strip 644 from inclining. The second arc-shaped strips 644 may be provided in plurality, and the second arc-shaped strips 644 are connected with each other through a telescopic sleeve and a spring, so as to increase the length of the shaping device 64 and ensure shaping effect.

In this embodiment, the blowing mechanism 5 includes a housing 51, the housing 51 is fixedly mounted on the support frame 1, the housing 51 is located above one of the feeding rollers 43 and is not in contact with the feeding roller 43, an air outlet 511 and an air inlet 512 are respectively formed in the housing 51, the air outlet 511 faces one side of the other feeding roller 43, and can blow plastic films, and the air inlet 512 is located at two sides of the housing 51 and is used for laterally intaking air.

In order to realize unidirectional air outlet, the surface of the shell 51 is rotatably provided with a baffle plate 53 for shielding the air outlet 511, the baffle plate 53 is positioned at the outer side of the air outlet 511, when the air in the shell 51 is discharged outwards, the baffle plate 53 can be blown open, and when the shell 51 is charged, the baffle plate 53 can be automatically closed, so that the plastic film is prevented from being attracted to one side of the shell 51. The baffle 53 is elastically connected with the housing 51 through the torsion spring 57, so that the baffle 53 can automatically reset when the housing 51 does not give off air. Fixedly connected with dead lever 56 on the inner wall of casing 51, slidable mounting has the baffle 55 that shelters from air intake 512 on the dead lever 56, and baffle 55 passes through spring and casing 51 elastic connection, and baffle 55 is located the air intake 512 inboard, and when not admitting air in the casing 51, baffle 55 can seal air intake 512 under the elasticity of spring, and when admitting air in the casing 51, baffle 55 can move under the effect of negative pressure for air intake 512 is opened. The fixed rod 56 is slidably provided with a gas plug plate 52, the surface of the gas plug plate 52 is attached to the inner wall of the housing 51, and the gas plug plate 52 is provided with a driving device 54 for driving the gas plug plate 52 to reciprocate, so that gas outlet and gas inlet are continuously performed.

In the present embodiment, there are two driving devices 54, and the two driving devices 54 are symmetrically disposed with respect to the center line of the air lock plate 52 as a symmetry axis. Specifically, the driving device 54 includes a connection plate 541, the connection plate 541 is fixedly mounted on a side of the air plug plate 52 away from the air outlet 511, a transmission arm 542 is rotatably mounted on the connection plate 541, and a rotation plate 543 is rotatably mounted on an end of the transmission arm 542 away from the connection plate 541. Specifically, the two ends of the driving arm 542 are respectively provided with a collar, the connecting plate 541 and the rotating plate 543 are respectively fixedly connected with a shaft lever, and the two collars are respectively rotatably installed on the two shaft levers. A rotating lever 544 is fixedly connected to the rotating plate 543, and the rotating lever 544 is rotatably mounted on the mounting plate 41. The rotary lever 544 is in driving connection with the drive shaft 42 via a belt, so that the drive shaft 42 can synchronously drive the drive device 54 during rotation.

When the plastic bag plastic film-stripping blow molding machine is used, the film is blown out by the die mechanism 2, when the height of the film cylinder is higher than that of the heat sealing plate 36, the lifting motor 61 is started, the output end of the lifting motor 61 drives the threaded rod 63 to rotate, the threaded rod 63 drives the driving frame 62 to move upwards through spiral transmission, and the driving frame 62 drives the two outer frames 35 to swing relatively through the rotating roller 34. The two outer frames 35 move upwards while approaching, and synchronously drive the two heat sealing plates 36 to move, so that the ports of the film cylinder are tightened. When the swing lever 33 moves to the horizontal state, the two heat seal plates 36 press the film tube, and the two nip rolls 39 clamp the film. At this time, the roller 34 contacts with the bottom of the buffer block 37, and the driving frame 62 drives the buffer block 37 to move upwards through the roller 34, so as to drive the counterweight frame 31 to move upwards. The weight frame 31 is lifted together with the outer frame 35, and the swinging rod 33 is not swung any more during the lifting process, so that the heat sealing plate 36 can always clamp the film. When the outer frame 35 is lifted to a certain position, the second gear 311 thereon is meshed with the transmission gear 46, and the lifting mechanism 6 is suspended. The film is then heated by the heat seal plate 36 so that the ends of the film are heat sealed and hardened.

The feeding motor 47 is then started, and the output end of the feeding motor 47 drives one of the driving shafts 42 to rotate, and the driving shaft 42 drives the other driving shaft 42 to reversely rotate through the driving gear 44, so that the feeding rollers 43 on the two driving shafts 42 synchronously reversely rotate. When the driving shaft 42 rotates, the driving shaft 45 at the bottom of the other driving shaft 42 is driven to synchronously rotate by a belt, the driving shaft 45 synchronously drives the driving gear 46 to rotate, the driving gear 46 drives the second gear 311 to rotate by meshing, the second gear 311 drives the connecting rod 38 at the axis of the second gear 311 to rotate, and the connecting rod 38 simultaneously drives the material pressing roller 39 and the first gear 310 to rotate. The first gear 310 drives the rack 312 to move toward the inside of the outer frame 35 by meshing, and further drives the heat seal plate 36 to move toward the inside of the outer frame 35, so that the two heat seal plates 36 release the hardened film port. The two nip rolls 39 are rotated in opposite directions in synchronism to convey the film upward. The hardened port of the film cylinder enters between the two feeding rollers 43 and continues to move upwards under the action of the two feeding rollers 43, so that feeding is realized.

On the other hand, when the driving shaft 42 rotates, the rotating rod 544 is synchronously driven by the belt, the rotating rod 544 synchronously drives the rotating plate 543 to rotate, and the rotating plate 543 drives the connecting plate 541 to move back and forth left and right through the driving arm 542, so as to drive the air plug plate 52 to reciprocate. When the air lock plate 52 moves to one side of the air outlet 511, air inside the housing 51 is compressed, so that air pressure inside the housing 51 is increased. The air pressure pushes the baffle plate 53 to enable the baffle plate 53 to be automatically opened, air flow is blown out from the air outlet 511, on one hand, the temperature of the film can be reduced, on the other hand, the film can be blown to one side of the discharging material, the film is prevented from being accumulated above the feeding roller 43, in addition, the film can be smoothed by uniform air flow, so that the film is unfolded smoothly, and wrinkles on the film are reduced. When the air plug plate 52 moves to the side of the connecting plate 541, the air flow is sucked into the housing 51, and at this time, the blocking piece 53 is reset under the action of the torsion spring 57 and the air pressure, so that the air outlet 511 is blocked, and the air cannot enter the housing 51 from the air outlet 511. At this time, the baffle 55 slides to one side of the air lock plate 52 under the negative pressure, so that the air inlet 512 is opened, and air is introduced into the housing 51 from the air inlet 512.

It is noted that relational terms such as first and second, and the like are 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. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims (10)

1. A plastic bag capable of shaping and easy-to-take-off film blowing machine, which is characterized by comprising:

a support (1);

a die mechanism (2);

a stretching mechanism (3) for stretching the film;

a lifting mechanism (6) for controlling the height of the stretching mechanism (3);

a feeding mechanism (4) for conveying the film;

the blowing mechanism (5) is used for controlling the discharging direction of the film and cooling the film;

the feeding mechanism (4) comprises a driving shaft (42), and a feeding roller (43) is arranged on the driving shaft (42).

2. The plastic bag easy-release film blowing machine as claimed in claim 1, wherein the stretching mechanism (3) comprises a weight frame (31), and two pressing devices are symmetrically arranged on the weight frame (31);

the compressing device comprises a fixing plate (32), the fixing plate (32) is fixedly arranged on the counterweight frame (31), two swinging rods (33) are rotatably arranged on the fixing plate (32), one end of each swinging rod (33) away from the fixing plate (32) is rotatably connected with an outer frame (35), a heat sealing plate (36) is slidably arranged on the inner wall of the outer frame (35), the heat sealing plate (36) is elastically connected with the outer frame (35) through a spring, and a rotating roller (34) is rotatably arranged on the outer frame (35).

3. The plastic bag easy-to-release film blowing machine according to claim 2, wherein a rack (312) is fixedly connected to the bottom of the heat sealing plate (36), a first gear (310) is meshed on the rack (312), a connecting rod (38) is fixedly connected to the axle center of the first gear (310), the connecting rod (38) is rotatably mounted on the outer frame (35), a pressing roller (39) is fixedly connected to the connecting rod (38), and one end of the connecting rod (38) penetrates through the outer frame (35) and is fixedly connected with a second gear (311).

4. The plastic bag easy-release blow molding machine according to claim 2, wherein the bottom of the weight frame (31) is elastically connected with a buffer block (37) through a spring, and the bottom of the buffer block (37) can be contacted with the rotating roller (34).

5. The plastic bag easy-to-release film blowing machine as claimed in claim 2, wherein the lifting mechanism (6) comprises a lifting motor (61), the lifting motor (61) is fixedly installed on the supporting frame (1), the output end of the lifting motor (61) is fixedly connected with a threaded rod (63), the threaded rod (63) is rotatably installed on the supporting frame (1), a driving frame (62) is connected to the threaded rod (63) in a threaded manner, the top of the driving frame (62) is contacted with the rotating roller (34), and a shaping device (64) is arranged on the driving frame (62);

the inner wall of the driving frame (62) is slidably provided with a guide shaft (65), the guide shaft (65) is fixedly arranged on the supporting frame (1), and the counterweight frame (31) is slidably arranged on the guide shaft (65).

6. The plastic bag easy-release film blowing machine as claimed in claim 5, wherein the shaping device (64) comprises a slide bar (641), the slide bar (641) is slidably mounted on the inner wall of the driving frame (62), one end of the slide bar (641) penetrates through the driving frame (62) and is fixedly connected with a stop block (642), the stop block (642) is elastically connected with the driving frame (62) through a spring, the other end of the stop block (642) is fixedly connected with a first arc-shaped strip (643), and the bottom of the first arc-shaped strip (643) is elastically connected with a second arc-shaped strip (644) through a spring.

7. The plastic bag easy-release film blowing machine as claimed in claim 1, wherein the feeding mechanism (4) further comprises a mounting plate (41), the mounting plate (41) is fixedly mounted on the supporting frame (1), the driving shafts (42) are rotatably mounted on the mounting plate (41), two driving gears (44) are fixedly connected to the driving shafts (42), the two driving gears (44) are meshed, and a feeding motor (47) is fixedly connected to one driving shaft (42).

8. The plastic bag easy-to-release film blowing machine as claimed in claim 7, wherein the mounting plate (41) is fixedly connected with a mounting frame (48), the mounting frame (48) is rotatably provided with a transmission shaft (45), the transmission shaft (45) is in transmission connection with the driving shaft (42) through a belt, and the transmission shaft (45) is fixedly connected with a transmission gear (46).

9. The plastic bag easy-to-release film blowing machine according to claim 1, wherein the blowing mechanism (5) comprises a shell (51), the shell (51) is fixedly installed on the supporting frame (1), an air outlet (511) and an air inlet (512) are respectively formed in the shell (51), a baffle (53) for shielding the air outlet (511) is installed on the surface of the shell (51) in a rotating manner, the baffle (53) is elastically connected with the shell (51) through a torsion spring (57), a fixing rod (56) is fixedly connected to the inner wall of the shell (51), a baffle (55) for shielding the air inlet (512) is installed on the fixing rod (56) in a sliding manner, a pneumatic plug plate (52) is installed on the fixing rod (56) in a sliding manner, and a driving device (54) is arranged on the pneumatic plug plate (52).

10. The plastic bag easy-release film blowing machine as claimed in claim 9, wherein the driving device (54) comprises a connecting plate (541), the connecting plate (541) is fixedly installed on one side of the air plug plate (52) away from the air outlet (511), a transmission arm (542) is rotatably installed on the connecting plate (541), a rotating plate (543) is rotatably installed on one end of the transmission arm (542) away from the connecting plate (541), a rotating rod (544) is fixedly connected on the rotating plate (543), and the rotating rod (544) is in transmission connection with the driving shaft (42) through a belt.