CN118683048A - Wrinkle-proof film blowing machine and method for producing packaging materials - Google Patents

Abstract

The invention discloses a crease-resistant film blowing machine and a crease-resistant film blowing method for packaging material production, which relate to the field of film blowing machines and comprise an extruder and a film blowing die, wherein the film blowing die is arranged on the extruder, the top of inflation film manufacturing mould is provided with the beam-shrinking and wiping board, and the both sides of beam-shrinking and wiping board all are provided with outer edge-inserting subassembly, have seted up the inflation film manufacturing mouth on the inflation film manufacturing mould. Simultaneously, interpolation frame and outer frame support the inside and outside of plastic film, prevent that plastic film from closing the in-process fold of piece, crease-resist effect is better, and can adjust interpolation frame and outer frame's position to provide the support to the plastic film of different width, switch the subassembly and drive interpolation frame and outer frame and remove in the syntropy under the equidirectional mode, make to the plastic film insert different plastic film width of adaptation under the unchangeable condition of limit degree of depth, switch the subassembly and drive interpolation frame and outer frame and remove in the backward mode, the adjustment is to the degree of depth of plastic film insert limit, the adaptability is wider.

Description

Wrinkle-proof film blowing machine and method for producing packaging materials

Technical Field

The invention relates to the field of film blowing machines, and in particular to an anti-wrinkle film blowing machine and a method for producing packaging materials.

Background Art

Packaging materials can be classified according to their physical properties, sources, sustainability and other factors. Film blowing machine is a key equipment used to produce plastic films, which are widely used as packaging materials. The film blowing process involves heating plastic particles to a molten state and extruding them through an extruder, and then blowing air to form a film bubble in the mold. By controlling the stretching ratio, cooling and curing process, films of different thicknesses and widths can be obtained. These films have good physical and chemical properties, such as barrier properties, strength and transparency, making them very suitable for use as packaging materials.

Due to the different uses of packaging bags, some packaging bags have folded edges on the sides, that is, the two sides of the packaging bags are bent inward. After the film is blown, a folding device (also called pressing edge, inserting edge, etc.) is needed to insert the edge of the plastic film.

Chinese patent application CN109822874A discloses a film blowing machine for preventing film wrinkles, including a machine body, an electromagnetic heater installed inside the machine body, a temperature sensor installed on the inner wall of the machine body, a tensioning mechanism arranged on one side of the winding frame, a traction roller arranged below the tensioning mechanism, a three-phase asynchronous motor, a winding roller and an electric control box arranged on the side of the winding frame close to the tensioning mechanism, and a speed sensor installed at the bottom end of the winding roller. The present invention detects the temperature of the melt inside the machine body by means of a temperature sensor, adjusts the temperature of the electromagnetic heater, and is relatively strong during die extrusion, detects the speed of the winding roller by means of a speed sensor, controls the tension of the film by means of the coordination of the tensioning mechanism and the traction roller, and controls the speed of the three-phase asynchronous motor to avoid excessive tension and wrinkling of the film when there is too much film on the winding roller;

Chinese patent application CN114603840A discloses an auxiliary film blowing device for manufacturing wrinkle-proof plastic bags, including an auxiliary mechanism, wherein the auxiliary mechanism includes a driving shaft, the periphery of the driving shaft is fixedly connected with a semi-bevel gear, the upper side of the semi-bevel gear is connected to a driven shaft through a bevel gear transmission, the middle part of the driven shaft is fixedly connected with a center column, and the upper and lower ends of the center column are hinged with hinge rods. When blowing film, after the film bag passes through the stretching block, the driving shaft drives the semi-bevel gear to mesh with the bevel gear in sequence, so that the driven shaft rotates forward and reversely in a cycle. Under the action of centrifugal force, the stretching block drives the buffer belt to contact the inner wall of the film bag, and assists in tensioning the film bag to avoid wrinkles caused by diameter instability during film blowing. By rotating the adjusting worm, the worm wheels on the left and right sides drive the clamps to rotate towards each other to reduce the angle between the clamps, and the rotation of the rollers is coordinated to reduce the friction with the contact surface of the film bag, thereby reducing wrinkles generated when the film bag is flattened.

Chinese patent CN109968645B discloses a multifunctional edge inserting mechanism for film blowing equipment, wherein the bottom of each triangular inserting plate assembly is hingedly connected to a lifting bracket by a swing shaft, and the triangular inserting plate assembly can be installed on the corresponding lifting bracket in a lateral swinging manner; a lateral driving mechanism for driving the triangular inserting plate assembly to swing left and right is also provided on the frame; a bubble supporting assembly is also installed in each triangular inserting plate assembly, and the bubble supporting assembly swings around the swing shaft together with the entire triangular inserting plate assembly, which is suitable for folding the film bubble in half into four folds, and also suitable for folding the film bubble in half into two folds.

The above patents and prior art also have the following defects:

The existing film blowing machine introduces pressurized gas into the inside of the plastic film to expand the plastic film, and uses an air ring on the outside of the plastic film to cool the plastic film. However, the gas inside the plastic film is heated for a long time, which causes the cooling speed of the plastic film to decrease and the cooling effect to be poor. When producing plastic films of different widths or when the depths of the folded edges of the plastic films are different, it is necessary to replace edge inserters of different sizes, which is troublesome to operate. When the existing film blowing machine is converging, it is supported and converged only by the external herringbone plate. The plastic film has no support inside, which is prone to wrinkles, and the quality of the produced plastic film is poor.

Therefore, the present application provides an anti-wrinkle film blowing machine and method for producing packaging materials to meet the needs.

Summary of the invention

The purpose of the present application is to provide an anti-wrinkle film blowing machine and method for the production of packaging materials, wherein the inner frame and the outer frame support the inside and outside of the plastic film at the same time to prevent the plastic film from wrinkling in the process of being gathered into sheets, and the anti-wrinkle effect is better. The positions of the inner frame and the outer frame can be adjusted to provide support for plastic films of different widths. The switching component drives the inner frame and the outer frame to move in the same direction in the same direction mode, so that different plastic film widths can be adapted without changing the depth of the plastic film inserting edge. The switching component drives the inner frame and the outer frame to move in the opposite direction in the reverse mode to adjust the depth of the plastic mold inserting edge, and has a wider adaptability.

To achieve the above-mentioned purpose, the present application provides the following technical solutions: an anti-wrinkle film blowing machine for producing packaging materials, comprising an extruder and a film blowing mold, the film blowing mold being mounted on the extruder, a convergence wiping plate being arranged above the film blowing mold, outer insert edge components being arranged on both sides of the convergence wiping plate, a film blowing port being opened on the film blowing mold, an inner insert edge component being installed on the film blowing mold and being located inside the film blowing port;

The inner insert edge assembly comprises an inner cooling unit and an inner insert edge frame;

The external insert frame assembly includes an external insert frame, and the external insert frame is located between the two internal insert frames;

A switching component is also provided on one side of the film blowing mold, and the switching component has a same-direction mode, a reverse mode and a separation mode. When the switching component is in the same-direction mode, the switching component can drive the inner frame and the outer frame to move in the same direction. When the switching component is in the reverse mode, the switching component can drive the inner frame and the outer frame to move in the opposite direction. When the switching component is in the separation mode, the switching component can drive the inner frame and the outer frame to move respectively.

Preferably, the switching assembly includes a rectangular rod, a driving gear, a co-directional gear, a reverse gear and an output rod. When the rectangular rod rotates, it can drive the outer frame to move, and when the output rod rotates, it can drive the inner frame to move. A rectangular hole is provided on the driving gear, and the rectangular rod passes through the driving gear through the rectangular hole and slides with the driving gear. When the co-directional gear rotates, it can drive the output rod to rotate in the same direction, and when the reverse gear rotates, it can drive the output rod to rotate in the reverse direction. When the driving gear moves on the rectangular rod, it can mesh with the co-directional gear and the reverse gear in sequence.

Preferably, the outer edge inserting assembly further comprises an outer drive belt, an outer drive screw, an outer drive screw barrel and a fixing rod;

The external drive screw is inserted into the external drive barrel and matched with the thread of the external drive barrel, and the external insert frame is fixedly mounted on the external drive screw and one end of the fixed rod;

The external drive belt member includes an external insert edge driving pulley, an external insert edge passive pulley and an external insert edge driving belt. The external insert edge driving pulley is fixedly mounted on the rectangular rod, the external insert edge passive pulley is fixedly mounted on the external drive barrel, and the external insert edge driving belt is connected to the external insert edge driving pulley and the external insert edge passive pulley.

Preferably, the switching component also includes a switching belt member, a switching driving gear and a switching passive gear, the switching belt member includes a switching driving pulley, a switching passive pulley and a switching drive belt, the switching driving pulley is fixedly mounted on the same-direction gear, the switching passive pulley is fixedly mounted on the output rod, the switching drive belt is connected to the switching driving pulley and the switching passive pulley, the switching driving gear is fixedly mounted on the reverse gear, the switching passive gear is fixedly mounted on the output rod, and the switching driving gear and the switching passive gear are meshed.

Preferably, the internal cooling unit includes an internal cooling air ring, an internal cooling air duct and an internal exhaust duct, the internal cooling air ring is fixedly mounted on the blown film mold, the internal exhaust duct is fixedly mounted on the blown film mold, a plurality of exhaust holes are provided on the side wall of the internal exhaust duct near the top, the bottom of the internal exhaust duct passes through the blown film mold and extends outward, the internal cooling air duct is fixedly mounted on the bottom of the internal cooling air ring and is connected to the internal cooling air ring, the internal cooling air duct passes through the blown film mold and is connected to an internal cooling fan.

Preferably, the inner insert edge assembly also includes an inner drive unit, which includes an inner drive shaft, an inner drive gear and two inner drive racks, the inner drive gear is fixedly mounted on the top of the inner drive shaft, the two inner drive racks are respectively fixedly mounted on the corresponding inner insert edge frames, and the two inner drive racks are respectively located on both sides of the inner drive gear and mesh with the inner drive gear.

Preferably, the internal drive unit also includes a fixed shell, a sliding block and an anti-slip plate, the fixed shell is fixedly installed on the internal exhaust duct, the internal drive shaft is rotatably connected to the fixed shell, the sliding block is fixedly installed in the fixed shell, a sliding groove is provided on the internal drive rack, the sliding block slides in the sliding groove, sliding holes are provided on both sides of the fixed shell, the internal drive rack slides in the sliding holes, and the anti-slip plate is fixedly installed on the end of the internal drive rack away from the internal insertion frame.

Preferably, the switching assembly also includes a transmission unit, which includes a connecting shaft, an active bevel gear, a passive bevel gear and a transmission belt member, the active bevel gear is fixedly mounted on the output rod, the passive bevel gear is fixedly mounted on the connecting shaft, the active bevel gear is meshed with the passive bevel gear, and the transmission belt member includes a transmission active pulley, a transmission passive pulley and a transmission drive belt, the transmission active pulley is fixedly mounted on the connecting shaft, the transmission passive pulley is fixedly mounted on the inner drive shaft, and the transmission drive belt is connected to the transmission active pulley and the transmission passive pulley.

Preferably, a frame is provided on one side of the extruder, a side plate is fixedly installed on the frame, the convergence and wiping plate is fixedly installed on the side plate, the external driving screw barrel is rotatably connected to the side plate, the fixing rod passes through the side plate and slidably cooperates with the side plate, a connecting box is fixedly installed on the side plate, the rectangular rod is rotatably connected in the connecting box, a rotating shaft is fixedly installed in the connecting box, the co-directional gear and the reverse gear are both rotatably connected to the rotating shaft, the connecting shaft is rotatably connected in the connecting box, the output rod is rotatably connected in the connecting box, one end of the output rod passes through the connecting box and is fixedly installed with a rotating block, a rotating rod is fixedly installed on the driving gear, the rotating rod is sleeved on the rectangular rod, the rotating rod passes through the connecting box and is fixedly installed with a rotating handle, and two traction wheels are also rotatably connected to the side plate, and the two traction wheels are located above the convergence and wiping plate;

A stabilizing plate is fixedly mounted on the driving gear, a stabilizing spring is fixedly mounted on the stabilizing plate, a stabilizing block is fixedly mounted on one end of the stabilizing spring, an end of the stabilizing block close to the rectangular rod is provided with an inclined surface, a stabilizing rod is fixedly mounted on one end of the stabilizing block, the stabilizing rod passes through the stabilizing plate and slidably cooperates with the stabilizing plate, and a stabilizing groove is provided on the rectangular rod.

A wrinkle-proof blown film method for producing packaging materials comprises the following steps:

Step 1: The extruder passes the molten plastic into the film blowing mold, and the film blowing mold extrude the molten plastic through the film blowing port, and pressurized gas is passed into the molten plastic, and the molten plastic expands into a plastic film under the action of the pressurized gas;

Step 2: the inner frame supports the plastic film inside the plastic film, and the outer frame supports the plastic film outside the plastic film and bends the plastic film inward;

Step 3: The bent plastic film is squeezed into a sheet through a gathering wiper;

Step 4: The switching component drives the inner frame and the outer frame to move in the same direction in the same direction, so that the inner frame and the outer frame match plastic films of different widths;

Step 5: Switch the component to the reverse mode to drive the inner frame and the outer frame to move in the opposite direction, and adjust the width of the plastic film to be bent inward;

Step 6: Switch the component to separate mode to move the inset border and the external border respectively, so that the position of the inset border and the external border can be adjusted more conveniently.

In summary, the technical effects and advantages of the present invention are as follows:

1. In the present invention, two inner insert frames support the plastic mold inside the plastic film, and the outer insert frame supports the outside of the plastic film. The outer insert frame is located between the two inner insert frames, and the side edges of the plastic film are pushed toward the center so that the side edges of the plastic film are inserted inward. At the same time, the inner insert frame and the outer insert frame support the inside and outside of the plastic film to prevent the plastic film from wrinkling in the process of being bundled into a sheet, and the anti-wrinkle effect is better. The positions of the inner insert frame and the outer insert frame can be adjusted to provide support for plastic films of different widths. The switching component drives the inner insert frame and the outer insert frame to move in the same direction in the same direction mode, so that different plastic film widths can be adapted without changing the insertion depth of the plastic film. The switching component drives the inner insert frame and the outer insert frame to move in the opposite direction in the reverse mode to adjust the insertion depth of the plastic mold, and the adaptability is wider. The switching component can drive the inner insert frame and the outer insert frame to move separately in the separation mode, and it is more convenient to adjust the positions of the inner insert frame and the outer insert frame separately.

2. In the present invention, the internal cooling fan passes the pressurized gas into the internal cooling air ring, and the internal cooling air ring passes the pressurized gas into the plastic film, the pressurized gas expands the plastic film, and at the same time, the pressurized gas takes away the heat of the plastic mold to form a circulating airflow, cools the plastic mold and shapes it, and improves the cooling speed of the plastic film. The pressurized gas passes through the internal exhaust pipe, and a pressure control valve is provided in the internal exhaust pipe to ensure the pressure on the expansion of the plastic film;

3. In the present invention, the driving gear drives the stabilizing plate, the stabilizing rod and the stabilizing block to move. When the stabilizing block moves to the stabilizing groove position, the stabilizing spring pushes the stabilizing block into the stabilizing groove, which can limit the driving gear to prevent the driving gear from moving when not operated. At the same time, the driving gear drives the stabilizing block to move, and the stabilizing block can be detached from the stabilizing groove through the inclined surface.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic diagram of the structure of an extruder, a film blowing die, a convergence wiper plate and a traction wheel in the present invention;

FIG2 is a schematic structural diagram of an extruder, a film blowing die, a side plate and an internal cooling unit in the present invention;

FIG3 is an enlarged view of part A in FIG2 of the present invention;

FIG4 is a schematic structural diagram of a film blowing mold, a side plate and a connection box in the present invention;

FIG5 is an enlarged view of portion B in FIG4 of the present invention;

FIG6 is a schematic structural diagram of a film blowing mold and an internal cooling unit in the present invention;

FIG7 is an enlarged view of portion C in FIG6 of the present invention;

FIG8 is a schematic structural diagram of a film blowing mold and a side plate in the present invention;

FIG9 is an enlarged view of portion D in FIG8 of the present invention;

FIG10 is a schematic structural diagram of the side plate, the connection box, the switching assembly and the transmission unit in the present invention;

FIG11 is an enlarged view of part E in FIG10 of the present invention;

FIG. 12 is a schematic diagram of the structure of the inner cooling air ring, the inner cooling air duct, the inner exhaust duct and the inner drive shaft in the present invention.

In the figure: 1. extruder; 2. film blowing mold; 3. convergence wiper; 4. external insert edge assembly; 41. external insert frame; 42. external drive belt; 43. external drive screw; 44. external drive barrel; 45. fixed rod; 5. internal insert edge assembly; 51. internal cooling unit; 511. internal cooling air ring; 512. internal cooling air duct; 513. internal exhaust duct; 52. internal insert frame; 53. internal drive unit; 531. internal drive shaft; 532. internal drive gear; 533. internal drive rack; 534. fixed shell; 535. sliding block ;536, anti-slip plate;6, switching assembly;61, rectangular rod;62, driving gear;63, same-direction gear;64, reverse gear;65, output rod;66, switching belt member;67, switching driving gear;68, switching passive gear;69, transmission unit;691, driving bevel gear;692, passive bevel gear;693, transmission belt member;7, frame;8, side plate;9, connecting box;10, rotating rod;11, traction wheel;12, stabilizing plate;13, stabilizing spring;14, stabilizing block;15, stabilizing rod.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Embodiment: Referring to FIG. 1 to FIG. 12 , an anti-wrinkle film blowing machine for producing packaging materials comprises an extruder 1 and a film blowing mold 2, the film blowing mold 2 is mounted on the extruder 1, a convergence wiping plate 3 is arranged above the film blowing mold 2, both sides of the convergence wiping plate 3 are provided with an outer insert edge assembly 4, a film blowing port is opened on the film blowing mold 2, and an inner insert edge assembly 5 is installed on the film blowing mold 2 and is located inside the film blowing port;

The inner insert edge assembly 5 includes an inner cooling unit 51 and an inner insert frame 52;

The external insert frame assembly 4 includes an external insert frame 41, and the external insert frame 41 is located between the two internal insert frames 52;

A switching component 6 is also provided on one side of the film blowing mold 2. The switching component 6 has a same-direction mode, a reverse mode and a separation mode. When the switching component 6 is in the same-direction mode, the switching component 6 can drive the inner frame 52 and the outer frame 41 to move in the same direction. When the switching component 6 is in the reverse mode, the switching component 6 can drive the inner frame 52 and the outer frame 41 to move in the opposite direction. When the switching component 6 is in the separation mode, the switching component 6 can drive the inner frame 52 and the outer frame 41 to move respectively.

The extruder 1 passes the molten plastic into the film blowing mold 2, and the film blowing mold 2 extrude the molten plastic through the film blowing port, and pressurized gas is passed into the molten plastic. The molten plastic expands into a plastic film under the action of the pressurized gas, and the inner frame 52 supports the plastic film inside the plastic film, and the outer frame 41 supports the plastic film outside the plastic film and bends the plastic film inwardly. After bending, the plastic film is squeezed into a sheet by the convergence wiper 3, and the switching component 6 drives the inner frame 52 and the outer frame 41 to move in the same direction in the same direction mode, so that the inner frame 52 and the outer frame 41 match plastic films of different widths, and the switching component 6 drives the inner frame 52 and the outer frame 41 to move in the opposite direction in the reverse mode to adjust the width of the inward bending of the plastic film, and the switching component 6 drives the inner frame 52 and the outer frame 41 to move in the separation mode respectively, so as to more conveniently adjust the positions of the inner frame 52 and the outer frame 41.

The two inner insert frames 52 support the plastic mold inside the plastic film, and the outer insert frame 41 supports the outside of the plastic film. The outer insert frame 41 is located between the two inner insert frames 52, and pushes the side of the plastic film toward the center so that the side of the plastic film is inserted inward. At the same time, the inner insert frame 52 and the outer insert frame 41 support the inside and outside of the plastic film to prevent the plastic film from wrinkling in the process of shrinking into a sheet, and the anti-wrinkle effect is better. The positions of the inner insert frame 52 and the outer insert frame 41 can be adjusted to provide support for plastic films of different widths. The switching component 6 drives the inner insert frame 52 and the outer insert frame 41 to move in the same direction in the same direction mode, so that different plastic film widths can be adapted without changing the insertion depth of the plastic film. The switching component 6 drives the inner insert frame 52 and the outer insert frame 41 to move in the opposite direction in the reverse mode to adjust the depth of the plastic mold insertion edge, and has a wider adaptability. The switching component 6 can drive the inner insert frame 52 and the outer insert frame 41 to move separately in the separation mode, and it is more convenient to adjust the positions of the inner insert frame 52 and the outer insert frame 41 separately.

Further, referring to Figures 1 to 12, the switching assembly 6 includes a rectangular rod 61, a driving gear 62, a co-directional gear 63, a reverse gear 64 and an output rod 65. When the rectangular rod 61 rotates, it can drive the external frame 41 to move, and when the output rod 65 rotates, it can drive the internal frame 52 to move. A rectangular hole is provided on the driving gear 62, and the rectangular rod 61 passes through the driving gear 62 through the rectangular hole and slides with the driving gear 62. When the co-directional gear 63 rotates, it can drive the output rod 65 to rotate in the same direction. When the reverse gear 64 rotates, it can drive the output rod 65 to rotate in the reverse direction. When the driving gear 62 moves on the rectangular rod 61, it can mesh with the co-directional gear 63 and the reverse gear 64 in sequence.

When the driving gear 62 moves to a point where it is not meshed with the same direction gear 63 and the reverse direction gear 64, the switching assembly 6 is in the separation mode. At this time, the driving gear 62 is operated to rotate to drive the rectangular rod 61 to rotate, and the rectangular rod 61 drives the outer insert frame 41 to move. The output rod 65 is operated to rotate, and the output rod 65 drives the inner insert frame 52 to move.

When the driving gear 62 moves to mesh with the same direction gear 63, the driving gear 62 is operated to rotate, the driving gear 62 drives the rectangular rod 61 to rotate, the rectangular rod 61 drives the external frame 41 to move, the driving gear 62 drives the same direction gear 63 to rotate, the same direction gear 63 drives the output rod 65 to rotate in the same direction, the output rod 65 drives the internal frame 52 to move, and the movement directions of the internal frame 52 and the external frame 41 are consistent;

When the driving gear 62 moves to engage with the reverse gear 64, the driving gear 62 is operated to rotate, the driving gear 62 drives the rectangular rod 61 to rotate, the rectangular rod 61 drives the external frame 41 to move, the driving gear 62 drives the reverse gear 64 to rotate, the reverse gear 64 drives the output rod 65 to rotate in the opposite direction, the output rod 65 drives the internal frame 52 to move, and the movement direction of the internal frame 52 is opposite to that of the external frame 41.

The driving gear 62 cooperates with the rectangular rod 61 , and the driving gear 62 moves on the rectangular rod 61 and rotates to drive the rectangular rod 61 to rotate.

Further, referring to FIGS. 1 to 12 , the outer insert edge assembly 4 further includes an outer drive belt member 42 , an outer drive screw rod 43 , an outer drive screw barrel 44 and a fixing rod 45 ;

The external drive screw 43 is inserted into the external drive screw barrel 44 and is threadedly matched with the external drive screw barrel 44. The external insert frame 41 is fixedly mounted on the external drive screw 43 and one end of the fixing rod 45.

The external drive belt member 42 includes an external plug-in edge driving pulley, an external plug-in edge driven pulley and an external plug-in edge driving belt. The external plug-in edge driving pulley is fixedly mounted on the rectangular rod 61, the external plug-in edge driven pulley is fixedly mounted on the external drive barrel 44, and the external plug-in edge driving belt is connected to the external plug-in edge driving pulley and the external plug-in edge driven pulley.

When the rectangular rod 61 rotates, the rectangular rod 61 drives the outer plug-in side active pulley to rotate, the outer plug-in side active pulley drives the outer plug-in side driving belt to rotate, the outer plug-in side driving belt causes the outer plug-in side passive pulley to rotate, the outer plug-in side passive pulley drives the outer drive barrel 44 to rotate, the outer drive barrel 44 drives the outer drive screw 43 to move in the outer drive barrel 44, and the outer drive screw 43 drives the outer plug-in frame 41 to move.

The external insert edge driving pulleys in the two external insert edge assemblies 4 are both fixedly mounted on the rectangular rod 61 .

Further, referring to Figures 1-12, the switching assembly 6 also includes a switching belt member 66, a switching driving gear 67 and a switching passive gear 68. The switching belt member 66 includes a switching driving pulley, a switching passive pulley and a switching drive belt. The switching driving pulley is fixedly mounted on the same-direction gear 63, the switching passive pulley is fixedly mounted on the output rod 65, the switching drive belt is connected to the switching driving pulley and the switching passive pulley, the switching driving gear 67 is fixedly mounted on the reverse gear 64, the switching passive gear 68 is fixedly mounted on the output rod 65, and the switching driving gear 67 and the switching passive gear 68 are meshed.

When the driving gear 62 meshes with the same-direction gear 63 and rotates, the driving gear 62 drives the same-direction gear 63 to rotate, the same-direction gear 63 drives the switching driving pulley to rotate, the switching driving pulley drives the switching driving belt to rotate, the switching driving belt causes the switching passive pulley to rotate, the switching passive pulley drives the output rod 65 to rotate, and the output rod 65 rotates in the same direction as the rectangular rod 61. When the driving gear 62 meshes with the reverse gear 64 and rotates, the reverse gear 64 drives the switching driving gear 67 to rotate, the switching driving gear 67 drives the switching passive gear 68 to rotate, the switching passive gear 68 drives the output rod 65 to rotate, and the output rod 65 rotates in the opposite direction to the rectangular rod 61.

Further, referring to Figures 1 to 12, the internal cooling unit 51 includes an internal cooling air ring 511, an internal cooling air duct 512 and an internal exhaust duct 513. The internal cooling air ring 511 is fixedly installed on the blown film mold 2, and the internal exhaust duct 513 is fixedly installed on the blown film mold 2. A plurality of exhaust holes are provided on the side wall of the internal exhaust duct 513 near the top. The bottom of the internal exhaust duct 513 penetrates the blown film mold 2 and extends outward. The internal cooling air duct 512 is fixedly installed at the bottom of the internal cooling air ring 511 and is connected to the internal cooling air ring 511. The internal cooling air duct 512 penetrates the blown film mold 2 and is connected to an internal cooling fan.

The internal cooling fan passes the pressurized gas into the internal cooling air ring 511, and the internal cooling air ring 511 passes the pressurized gas into the plastic film. The pressurized gas expands the plastic film and at the same time takes away the heat of the plastic mold to cool and shape the plastic mold. The pressurized gas passes through the internal exhaust pipe 513, and a pressure control valve is provided in the internal exhaust pipe 513 to ensure the pressure on the expansion of the plastic film.

The film blowing mold 2 is also provided with an external cooling air ring located outside the film blowing port to cool the plastic film outside the plastic film.

Further, referring to Figures 1 to 12, the inner insert edge assembly 5 also includes an inner drive unit 53, which includes an inner drive shaft 531, an inner drive gear 532 and two inner drive racks 533. The inner drive gear 532 is fixedly mounted on the top of the inner drive shaft 531, and the two inner drive racks 533 are respectively fixedly mounted on the corresponding inner insert edge frame 52. The two inner drive racks 533 are respectively located on both sides of the inner drive gear 532 and mesh with the inner drive gear 532.

When the inner driving shaft 531 rotates, the inner driving shaft 531 drives the inner driving gear 532 to rotate, and the inner driving gear 532 drives the two inner driving racks 533 to move, and the movement directions of the two inner driving racks 533 are opposite, and the inner driving racks 533 drive the corresponding inner insert frame 52 to move.

Further, referring to Figures 1 to 12, the internal drive unit 53 also includes a fixed shell 534, a sliding block 535 and an anti-slip plate 536. The fixed shell 534 is fixedly installed on the internal exhaust duct 513, the internal drive shaft 531 is rotatably connected to the fixed shell 534, the sliding block 535 is fixedly installed in the fixed shell 534, a sliding groove is provided on the internal drive rack 533, the sliding block 535 slides in the sliding groove, sliding holes are provided on both sides of the fixed shell 534, the internal drive rack 533 slides in the sliding holes, and the anti-slip plate 536 is fixedly installed on the end of the internal drive rack 533 away from the inner insert frame 52.

When the inner driving rack 533 moves, it drives the sliding block 535 to move. The sliding block 535 moves in the sliding groove, so that the inner driving rack 533 moves more stably and is not easy to shake.

Further, referring to Figures 1-12, the switching assembly 6 also includes a transmission unit 69, which includes a connecting shaft, an active bevel gear 691, a passive bevel gear 692 and a transmission belt member 693. The active bevel gear 691 is fixedly mounted on the output rod 65, the passive bevel gear 692 is fixedly mounted on the connecting shaft, the active bevel gear 691 is meshed with the passive bevel gear 692, and the transmission belt member 693 includes a transmission active pulley, a transmission passive pulley and a transmission drive belt. The transmission active pulley is fixedly mounted on the connecting shaft, the transmission passive pulley is fixedly mounted on the inner drive shaft 531, and the transmission drive belt is connected to the transmission active pulley and the transmission passive pulley.

When the output rod 65 rotates, it drives the active bevel gear 691 to rotate, the active bevel gear 691 drives the passive bevel gear 692 to rotate, the passive bevel gear 692 drives the connecting shaft to rotate, the connecting shaft drives the transmission active pulley to rotate, the transmission active pulley drives the transmission driving belt to rotate, the transmission driving belt causes the transmission passive pulley to rotate, and the transmission passive pulley drives the inner drive shaft 531 to rotate.

Further, referring to Figures 1 to 12, a frame 7 is provided on one side of the extruder 1, a side plate 8 is fixedly mounted on the frame 7, the convergence wiper plate 3 is fixedly mounted on the side plate 8, the external drive screw barrel 44 is rotatably connected to the side plate 8, the fixed rod 45 passes through the side plate 8 and slidably cooperates with the side plate 8, a connecting box 9 is fixedly mounted on the side plate 8, a rectangular rod 61 is rotatably connected in the connecting box 9, a rotating shaft is fixedly mounted in the connecting box 9, a co-directional gear 63 and a reverse gear 64 are both rotatably connected to the rotating shaft, the connecting shaft is rotatably connected in the connecting box 9, an output rod 65 is rotatably connected in the connecting box 9, one end of the output rod 65 passes through the connecting box 9 and is fixedly mounted with a rotating block, a rotating rod 10 is fixedly mounted on the driving gear 62, the rotating rod 10 is sleeved on the rectangular rod 61, the rotating rod 10 passes through the connecting box 9 and is fixedly mounted with a rotating handle, and two traction wheels 11 are also rotatably connected to the side plate 8, and the two traction wheels 11 are located above the convergence wiper plate 3;

A stabilizing plate 12 is fixedly mounted on the driving gear 62, a stabilizing spring 13 is fixedly mounted on the stabilizing plate 12, a stabilizing block 14 is fixedly mounted on one end of the stabilizing spring 13, an end of the stabilizing block 14 close to the rectangular rod 61 is arranged as an inclined surface, a stabilizing rod 15 is fixedly mounted on one end of the stabilizing block 14, the stabilizing rod 15 passes through the stabilizing plate 12 and slidably cooperates with the stabilizing plate 12, and a stabilizing groove is provided on the rectangular rod 61.

The two traction wheels 11 pull and guide the plastic film onto the winding roller, the rotating rod 10 can drive the driving gear 62 to move on the rectangular rod 61 and can drive the driving gear 62 to rotate, the driving gear 62 drives the stabilizing plate 12, the stabilizing rod 15 and the stabilizing block 14 to move, when the stabilizing block 14 moves to the stabilizing groove position, the stabilizing spring 13 pushes the stabilizing block 14 into the stabilizing groove, and can limit the driving gear 62 to prevent the driving gear 62 from moving when not operated, and at the same time the driving gear 62 drives the stabilizing block 14 to move, and the stabilizing block 14 can be detached from the stabilizing groove through the inclined surface.

A wrinkle-proof blown film method for producing packaging materials comprises the following steps:

Step 1: The extruder 1 passes the molten plastic into the film blowing mold 2, and the film blowing mold 2 extrude the molten plastic through the film blowing port, and pressurized gas is passed into the molten plastic, and the molten plastic expands into a plastic film under the action of the pressurized gas;

Step 2: The inner frame 52 supports the plastic film inside the plastic film, and the two outer frames 41 support the plastic film outside the plastic film and bend the plastic film inwards;

Step 3: The bent plastic film is squeezed into a sheet through a gathering wiper 3;

Step 4: The switching component 6 drives the inner frame 52 and the outer frame 41 to move in the same direction in the same direction, so that the inner frame 52 and the outer frame 41 match plastic films of different widths;

Step 5: The switching component 6 drives the inner frame 52 and the outer frame 41 to move in the opposite direction in the reverse mode to adjust the width of the plastic film to be bent inwards;

Step 6: The switching component 6 drives the inner frame 52 and the outer frame 41 to move respectively in the separation mode, so as to more conveniently adjust the positions of the inner frame 52 and the outer frame 41 .

Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A wrinkle-proof film blowing machine for producing packaging materials, comprising an extruder (1) and a film blowing mold (2), characterized in that: the film blowing mold (2) is mounted on the extruder (1), a convergence wiping plate (3) is arranged above the film blowing mold (2), both sides of the convergence wiping plate (3) are provided with external insert edge components (4), a film blowing port is opened on the film blowing mold (2), and an internal insert edge component (5) is installed on the film blowing mold (2) and is located inside the film blowing port; The inner insert edge assembly (5) comprises an inner cooling unit (51) and an inner insert edge frame (52); The external insert frame assembly (4) comprises an external insert frame (41), and the external insert frame (41) is located between the two internal insert frames (52); A switching component (6) is also provided on one side of the film blowing mold (2). The switching component (6) has a same-direction mode, a reverse mode, and a separation mode. When the switching component (6) is in the same-direction mode, the switching component (6) can drive the inset frame (52) and the external frame (41) to move in the same direction. When the switching component (6) is in the reverse mode, the switching component (6) can drive the inset frame (52) and the external frame (41) to move in the reverse direction. When the switching component (6) is in the separation mode, the switching component (6) can drive the inset frame (52) and the external frame (41) to move respectively. 2. The wrinkle-proof film blowing machine for packaging material production according to claim 1, characterized in that: the switching component (6) comprises a rectangular rod (61), a driving gear (62), a co-directional gear (63), a reverse gear (64) and an output rod (65); when the rectangular rod (61) rotates, it can drive the outer insert frame (41) to move; when the output rod (65) rotates, it can drive the inner insert frame (52) to move; a rectangular hole is provided on the driving gear (62); the rectangular rod (61) passes through the driving gear (62) through the rectangular hole and is slidably matched with the driving gear (62); when the co-directional gear (63) rotates, it can drive the output rod (65) to rotate in the same direction; when the reverse gear (64) rotates, it can drive the output rod (65) to rotate in the reverse direction; when the driving gear (62) moves on the rectangular rod (61), it can mesh with the co-directional gear (63) and the reverse gear (64) in sequence. 3. The wrinkle-proof film blowing machine for producing packaging materials according to claim 2, characterized in that: the outer inserting edge assembly (4) further comprises an outer driving belt member (42), an outer driving screw rod (43), an outer driving screw barrel (44) and a fixing rod (45); The external drive screw (43) is inserted into the external drive screw barrel (44) and is threadably matched with the external drive screw barrel (44), and the external insertion frame (41) is fixedly mounted on the external drive screw (43) and one end of the fixing rod (45); The external drive belt member (42) comprises an external insert edge driving pulley, an external insert edge passive pulley and an external insert edge driving belt, the external insert edge driving pulley is fixedly mounted on the rectangular rod (61), the external insert edge passive pulley is fixedly mounted on the external drive screw barrel (44), and the external insert edge driving belt is connected to the external insert edge driving pulley and the external insert edge passive pulley. 4. A wrinkle-proof film blowing machine for packaging material production according to claim 2, characterized in that: the switching component (6) further includes a switching belt member (66), a switching driving gear (67) and a switching passive gear (68), the switching belt member (66) includes a switching driving pulley, a switching passive pulley and a switching driving belt, the switching driving pulley is fixedly mounted on the same-direction gear (63), the switching passive pulley is fixedly mounted on the output rod (65), the switching driving belt is connected to the switching driving pulley and the switching passive pulley, the switching driving gear (67) is fixedly mounted on the reverse gear (64), the switching passive gear (68) is fixedly mounted on the output rod (65), and the switching driving gear (67) and the switching passive gear (68) are meshed. 5. An anti-wrinkle blown film machine for producing packaging materials according to claim 2, characterized in that: the inner cooling unit (51) comprises an inner cooling air ring (511), an inner cooling air duct (512) and an inner exhaust duct (513), the inner cooling air ring (511) is fixedly mounted on the film blowing mold (2), the inner exhaust duct (513) is fixedly mounted on the film blowing mold (2), a plurality of exhaust holes are opened on the side wall of the inner exhaust duct (513) near the top, the bottom of the inner exhaust duct (513) passes through the film blowing mold (2) and extends outward, the inner cooling air duct (512) is fixedly mounted on the bottom of the inner cooling air ring (511) and is connected to the inner cooling air ring (511), and the inner cooling air duct (512) passes through the film blowing mold (2) and is connected to an inner cooling fan. 6. The wrinkle-proof film blowing machine for producing packaging materials according to claim 5, characterized in that: the inner insert edge assembly (5) further comprises an inner drive unit (53), the inner drive unit (53) comprises an inner drive shaft (531), an inner drive gear (532) and two inner drive racks (533), the inner drive gear (532) is fixedly mounted on the top of the inner drive shaft (531), the two inner drive racks (533) are respectively fixedly mounted on the corresponding inner insert edge frame (52), and the two inner drive racks (533) are respectively located on both sides of the inner drive gear (532) and meshed with the inner drive gear (532). 7. An anti-wrinkle film blowing machine for packaging material production according to claim 6, characterized in that: the inner driving unit (53) further includes a fixed shell (534), a sliding block (535) and an anti-slip plate (536), the fixed shell (534) is fixedly mounted on the inner exhaust duct (513), the inner driving shaft (531) is rotatably connected to the fixed shell (534), the sliding block (535) is fixedly mounted in the fixed shell (534), a sliding groove is provided on the inner driving rack (533), the sliding block (535) is slidably fitted in the sliding groove, sliding holes are provided on both sides of the fixed shell (534), the inner driving rack (533) is slidably fitted in the sliding holes, and the anti-slip plate (536) is fixedly mounted on one end of the inner driving rack (533) away from the inner insert frame (52). 8. An anti-wrinkle film blowing machine for packaging material production according to claim 6, characterized in that: the switching component (6) also includes a transmission unit (69), the transmission unit (69) includes a connecting shaft, an active bevel gear (691), a passive bevel gear (692) and a transmission belt member (693), the active bevel gear (691) is fixedly mounted on the output rod (65), the passive bevel gear (692) is fixedly mounted on the connecting shaft, the active bevel gear (691) is meshed with the passive bevel gear (692), the transmission belt member (693) includes a transmission active pulley, a transmission passive pulley and a transmission drive belt, the transmission active pulley is fixedly mounted on the connecting shaft, the transmission passive pulley is fixedly mounted on the inner drive shaft (531), and the transmission drive belt is connected to the transmission active pulley and the transmission passive pulley. 9. A wrinkle-proof film blowing machine for producing packaging materials according to claim 3, characterized in that: a frame (7) is provided on one side of the extruder (1), a side plate (8) is fixedly mounted on the frame (7), the convergence wiper plate (3) is fixedly mounted on the side plate (8), the external drive screw barrel (44) is rotatably connected to the side plate (8), the fixed rod (45) passes through the side plate (8) and slidably cooperates with the side plate (8), a connecting box (9) is fixedly mounted on the side plate (8), the rectangular rod (61) is rotatably connected in the connecting box (9), a rotating shaft is fixedly mounted in the connecting box (9), and the co-directional gear (63) is ) and the reverse gear (64) are both rotatably connected to a rotating shaft, the connecting shaft is rotatably connected in a connecting box (9), the output rod (65) is rotatably connected in the connecting box (9), one end of the output rod (65) passes through the connecting box (9) and is fixedly mounted with a rotating block, a rotating rod (10) is fixedly mounted on the driving gear (62), the rotating rod (10) is sleeved on the rectangular rod (61), the rotating rod (10) passes through the connecting box (9) and is fixedly mounted with a rotating handle, and two traction wheels (11) are also rotatably connected to the side plate (8), and the two traction wheels (11) are located above the convergence wiper plate (3); A stabilizing plate (12) is fixedly mounted on the driving gear (62), a stabilizing spring (13) is fixedly mounted on the stabilizing plate (12), a stabilizing block (14) is fixedly mounted on one end of the stabilizing spring (13), an end of the stabilizing block (14) close to the rectangular rod (61) is provided with an inclined surface, a stabilizing rod (15) is fixedly mounted on one end of the stabilizing block (14), the stabilizing rod (15) passes through the stabilizing plate (12) and is slidably matched with the stabilizing plate (12), and a stabilizing groove is provided on the rectangular rod (61). 10. A wrinkle-free film blowing method for producing packaging materials, applicable to any wrinkle-free film blowing machine for producing packaging materials in claims 1-9, characterized in that it comprises the following steps: Step 1: the extruder (1) passes the molten plastic into the film blowing mold (2), the film blowing mold (2) extrude the molten plastic through the film blowing port, pressurized gas is passed into the molten plastic, and the molten plastic expands into a plastic film under the action of the pressurized gas; Step 2: the inner frame (52) supports the plastic film inside the plastic film, and the outer frame (41) supports the plastic film outside the plastic film and bends the plastic film inwards; Step 3: The bent plastic film is squeezed into a sheet by a gathering wiper (3); Step 4: The switching component (6) drives the inner frame (52) and the outer frame (41) to move in the same direction in the same direction mode, so that the inner frame (52) and the outer frame (41) match plastic films of different widths; Step 5: The switching component (6) drives the inner frame (52) and the outer frame (41) to move in the opposite direction in the reverse mode, so as to adjust the width of the plastic film to be bent inwards; Step 6: The switching component (6) drives the inner frame (52) and the outer frame (41) to move respectively in the separation mode, so as to more conveniently adjust the positions of the inner frame (52) and the outer frame (41).