CN118683048B - 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

Crease-resistant film blowing machine and method for packaging material production

Technical Field

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

Background

Packaging materials can be classified according to their physical properties, origin, sustainability, etc., film blowing machines are a key device used to produce plastic films, which are widely used as packaging materials, and film blowing processes involve heating plastic particles to a molten state and extruding them through an extrusion head, and then forming film bubbles in a die by blowing. Films of different thickness and width can be obtained by controlling the stretch ratio, cooling and curing processes, which films have good physical and chemical properties such as barrier properties, strength and transparency and are therefore very suitable for use as packaging materials.

Because the sides of the packaging bags with different purposes are provided with folds, namely the two sides of the packaging bags are inwards folded, a folding device (also called edge pressing, edge inserting and the like) is needed to be used for inserting edges of the plastic films after film blowing.

Chinese patent application CN109822874a discloses a inflation film manufacturing machine that prevents film fold, which comprises a bod, the internally mounted of organism has electromagnetic heater, temperature sensor is installed to the inner wall of organism, one side of rolling frame is provided with straining device, straining device's below is provided with the traction roller, one side that the rolling frame is close to straining device is provided with three-phase asynchronous motor, wind-up roll and electric cabinet, rotation speed sensor is installed to the bottom of wind-up roll. According to the invention, the temperature of melt in the machine body is detected through the temperature sensor, the temperature of the electromagnetic heater is regulated, the film is firmer during extrusion of the die head, the rotating speed of the winding roller is detected through the rotating speed sensor, the tension of the film is controlled through the cooperation of the tensioning mechanism and the traction roller, the rotating speed of the three-phase asynchronous motor is controlled, and the film is prevented from being wrinkled due to overlarge tension when the film on the winding roller is too much;

Chinese patent application CN114603840a discloses a film blowing auxiliary device for manufacturing a plastic bag with fold prevention, which comprises an auxiliary mechanism, the auxiliary mechanism comprises a driving shaft, the periphery of the driving shaft is fixedly connected with half bevel gear, the upper side of the half bevel gear is connected with a driven shaft through bevel gear transmission, the middle part of the driven shaft is fixedly connected with a center column, the upper and lower ends of the center column are hinged with hinge rods, when film blowing is performed, after a film bag passes through an expansion block, the driving shaft drives the half bevel gear to sequentially engage with the bevel gear, so that the driven shaft circularly rotates forward and reversely, under the action of centrifugal force, the expansion block drives a buffer belt to contact with the inner wall of the film bag, the film bag is tensioned in an auxiliary manner, fold generation caused by diameter instability during film blowing is avoided, through rotating an adjusting worm, worm wheels on the left side and the right side drive clamping plates to rotate in opposite directions to reduce included angle between the clamping plates, friction with a roller is reduced, and fold generated during film bag flattening is reduced;

Chinese patent CN109968645B discloses a multifunctional edge inserting mechanism of a film blowing device, wherein the bottom of each triangular inserting plate assembly is hinged with a lifting bracket by a pendulum shaft, the triangular inserting plate assemblies can be installed on the corresponding lifting bracket in a transverse swinging manner, a transverse driving mechanism for driving the triangular inserting plate assemblies to swing left and right is further arranged on the frame, a foam supporting assembly is also installed in each triangular inserting plate assembly, and the foam supporting assembly swings along with the whole triangular inserting plate assembly around the pendulum shaft, so that the film bubble folding mechanism is suitable for folding the film bubble into four folds and folding the film bubble into two folds.

The above-mentioned patents and prior art also have the following drawbacks:

The existing film blowing machine is used for blowing in pressure gas inside a plastic film to expand the plastic film, an air ring is used for cooling the plastic film outside the plastic film, but the gas inside the plastic film is heated for a long time, so that the cooling speed of the plastic film is reduced, the cooling effect is poor, the edge inserting devices with different sizes are required to be replaced when the plastic films with different widths are produced or the folding depths of the plastic film are different, the operation is troublesome, the existing film blowing machine is used for supporting and collecting only through an external lambdoidal plate when the film is collected, no support exists inside the plastic film, wrinkles are easily generated, and the quality of the produced plastic film is poor.

Therefore, the application provides an anti-wrinkling film blowing machine and a method for producing packaging materials, which meet the demands.

Disclosure of Invention

The application aims to provide a crease-resistant film blowing machine and a crease-resistant film blowing method for packaging material production, which are used for supporting the inside and the outside of a plastic film simultaneously by an interpolation frame and an extrapolation frame, preventing the plastic film from creasing in the process of bundling and sheeting, and have better crease-resistant effect, and the positions of the interpolation frame and the extrapolation frame can be adjusted, so that the plastic films with different widths are supported, a switching component drives the interpolation frame and the extrapolation frame to move in the same direction in a same direction mode, different plastic film widths are adapted under the condition that the depth of the interpolation edge of the plastic film is unchanged, and the switching component drives the interpolation frame and the extrapolation frame to move in the opposite direction in a reverse mode, so that the depth of the interpolation edge of the plastic film is adjusted, and the adaptability is wider.

The crease-resistant film blowing machine for producing the packaging material comprises an extruder and a film blowing die, wherein the film blowing die is arranged on the extruder, a beam-drawing and wiping plate is arranged above the film blowing die, outer edge inserting assemblies are arranged on two sides of the beam-drawing and wiping plate, a film blowing opening is formed in the film blowing die, and an inner edge inserting assembly is arranged on the film blowing die and is positioned at the inner side of the film blowing opening;

the interpolation edge component comprises an internal cooling unit and an interpolation frame;

The external edge inserting assembly comprises an external edge inserting frame, and the external edge inserting frame is positioned between the two internal edge inserting frames;

One side of the film blowing mould is also provided with a switching component, the switching component is provided with a homodromous mode, a reverse mode and a separation mode, when the switching component is in the homodromous mode, the switching component can drive the interpolation frame and the extrapolation frame to move in the same direction, when the switching component is in the reverse mode, the switching component can drive the interpolation frame and the extrapolation frame to move in the reverse direction, and when the switching component is in the separation mode, the switching component can respectively drive the interpolation frame and the extrapolation frame to move.

Preferably, the switching component comprises a rectangular rod, a driving gear, a same-direction gear, a reverse gear and an output rod, wherein the rectangular rod can drive the externally inserted frame to move when rotating, the output rod can drive the internally inserted frame to move when rotating, a rectangular hole is formed in the driving gear, the rectangular rod penetrates through the driving gear through the rectangular hole and is in sliding fit with the driving gear, the same-direction gear can drive the output rod to rotate in the same direction when rotating, the reverse gear can drive the output rod to rotate reversely when rotating, and the driving gear can sequentially mesh with the same-direction gear and the reverse gear when moving on the rectangular rod.

Preferably, the outer edge inserting assembly further comprises an outer driving belt piece, an outer driving screw rod, an outer driving screw cylinder and a fixing rod;

The external driving screw is inserted into the external driving screw cylinder and is in threaded fit with the external driving screw cylinder, and the external inserting frame is fixedly arranged at one end of the external driving screw and one end of the fixing rod;

The outer driving belt piece comprises an outer inserting side driving belt pulley, an outer inserting side driven belt pulley and an outer inserting side driving belt, wherein the outer inserting side driving belt pulley is fixedly arranged on the rectangular rod, the outer inserting side driven belt pulley is fixedly arranged on the outer driving screw cylinder, and the outer inserting side driving belt is connected to the outer inserting side driving belt pulley and the outer inserting side driven belt pulley.

Preferably, the switching assembly further comprises a switching belt piece, a switching driving gear and a switching driven gear, the switching belt piece comprises a switching driving belt pulley, a switching driven belt pulley and a switching driving belt, the switching driving belt pulley is fixedly installed on the same-direction gear, the switching driven belt pulley is fixedly installed on the output rod, the switching driving belt is connected on the switching driving belt pulley and the switching driven belt pulley, the switching driving gear is fixedly installed on the reverse gear, the switching driven gear is fixedly installed on the output rod, and the switching driving gear is meshed with the switching driven gear.

Preferably, the internal cooling unit comprises an internal cooling air ring, an internal cooling air pipe and an internal exhaust pipe, wherein the internal cooling air ring is fixedly installed on the film blowing die, the internal exhaust pipe is fixedly installed on the film blowing die, a plurality of exhaust holes are formed in the side wall, close to the top, of the internal exhaust pipe, the bottom of the internal exhaust pipe penetrates through the film blowing die and extends outwards, the internal cooling air pipe is fixedly installed at the bottom of the internal cooling air ring and is communicated with the internal cooling air ring, and the internal cooling air pipe penetrates through the film blowing die and is connected with an internal cooling fan.

Preferably, the inner inserting edge assembly further comprises an inner driving unit, the inner driving unit comprises an inner driving shaft, an inner driving gear and two inner driving racks, the inner driving gear is fixedly installed at the top of the inner driving shaft, the two inner driving racks are respectively and fixedly installed on the corresponding inner inserting frame, and the two inner driving racks are respectively located at two sides of the inner driving gear and meshed with the inner driving gear.

Preferably, the inner driving unit further comprises a fixing shell, a sliding block and an anti-falling plate, the fixing shell is fixedly arranged on the inner exhaust pipe, the inner driving shaft is rotationally connected to the fixing shell, the sliding block is fixedly arranged in the fixing shell, a sliding groove is formed in the inner driving rack, the sliding block is in sliding fit with the sliding groove, sliding holes are formed in two sides of the fixing shell, the inner driving rack is in sliding fit with the sliding holes, and the anti-falling plate is fixedly arranged at one end of the inner driving rack, which is far away from the interpolation frame.

Preferably, the switching assembly further comprises a transmission unit, the transmission unit comprises a connecting shaft, a driving bevel gear, a driven bevel gear and a transmission belt piece, the driving bevel gear is fixedly installed on the output rod, the driven bevel gear is fixedly installed on the connecting shaft, the driving bevel gear is meshed with the driven bevel gear, the transmission belt piece comprises a transmission driving belt pulley, a transmission driven belt pulley and a transmission driving belt, the transmission driving belt pulley is fixedly installed on the connecting shaft, the transmission driven belt pulley is fixedly installed on the inner driving shaft, and the transmission driving belt is connected on the transmission driving belt pulley and the transmission driven belt pulley.

Preferably, a frame is arranged on one side of the extruder, a side plate is fixedly arranged on the frame, the harvest scraping plate is fixedly arranged on the side plate, the external driving screw cylinder is rotationally connected on the side plate, the fixed rod penetrates through the side plate and is in sliding fit with the side plate, a connecting box is fixedly arranged on the side plate, the rectangular rod is rotationally connected in the connecting box, a rotating shaft is fixedly arranged in the connecting box, the homodromous gear and the reversing gear are rotationally connected on the rotating shaft, the connecting shaft is rotationally connected in the connecting box, the output rod is rotationally connected in the connecting box, one end of the output rod penetrates through the connecting box and is fixedly provided with a rotating block, the driving gear is fixedly provided with a rotating rod, the rotating rod is sleeved on the rectangular rod and penetrates through the connecting box and is fixedly provided with a rotating handle, the side plate is rotationally connected with two traction wheels, and the two traction wheels are positioned above the harvest scraping plate;

The driving gear is provided with a fixing plate fixedly mounted thereon, the fixing plate is provided with a fixing spring, one end of the fixing spring is fixedly mounted with a fixing clamping block, the fixing clamping block is close to one end of the rectangular rod and is arranged in an inclined plane, one end of the fixing clamping block is fixedly mounted with a fixing rod, the fixing rod penetrates through the fixing plate and is in sliding fit with the fixing plate, and the rectangular rod is provided with a fixing groove.

A crease-resistant film blowing method for producing packaging materials comprises the following steps:

The method comprises the steps that firstly, molten plastics are introduced into a film blowing die by an extruder, the molten plastics are extruded by the film blowing die through a film blowing port, pressure gas is introduced into the molten plastics, and the molten plastics are expanded into plastic films under the action of the pressure gas;

the second step, the inner inserted frame supports the plastic film inside the plastic film, the outer inserted frame supports the plastic film outside the plastic film and bends the plastic film inwards;

Step three, extruding the bent plastic film into a sheet shape through a beam-shrinking and rubbing plate;

Step four, the switching component drives the interpolation frame and the external interpolation frame to move in the same direction under the same-direction mode, so that the interpolation frame and the external interpolation frame are matched with plastic films with different widths;

Step five, the switching component drives the interpolation frame and the external interpolation frame to reversely move in a reverse mode, and the width of inwards bending the plastic film is adjusted;

And step six, the switching component drives the interpolation frame and the external interpolation frame to move respectively in a separation mode, so that the positions of the interpolation frame and the external interpolation frame can be adjusted more conveniently.

In summary, the invention has the technical effects and advantages that:

1. According to the invention, the two interpolation frames support the plastic mould inside the plastic film, the outer interpolation frame supports the outer part of the plastic film, the outer interpolation frame is positioned between the two interpolation frames, the side edge of the plastic film is pushed to the center, so that the side edge of the plastic film faces the inner interpolation frame, meanwhile, the inner interpolation frame and the outer interpolation frame support the inner and outer sides of the plastic film, the plastic film is prevented from wrinkling in the process of being folded into sheets, the crease-resistant effect is better, the positions of the interpolation frame and the outer interpolation frame can be adjusted, so that the support is provided for the plastic films with different widths, the switching component drives the interpolation frame and the outer interpolation frame to move in the same direction in the same mode, the switching component adapts to different plastic film widths under the condition that the depth of the interpolation frame and the outer interpolation frame is unchanged, the switching component drives the interpolation frame and the outer interpolation frame to move in the opposite direction in the reverse mode, the depth of the plastic mould is adjusted, the adaptability is wider, and the switching component can independently drive the interpolation frame and the outer interpolation frame to move in the separation mode, and the positions of the interpolation frame and the outer interpolation frame are independently adjusted more conveniently;

2. According to the invention, the internal cooling fan is used for introducing pressure gas into the internal cooling air ring, the internal cooling air ring is used for introducing the pressure gas into the plastic film, the pressure gas expands the plastic film, meanwhile, the pressure gas takes away the heat of the plastic film to form circulating air flow, the plastic film is cooled and shaped, the cooling speed of the plastic film is improved, the pressure gas passes through the internal exhaust pipe, and the internal exhaust pipe is internally provided with the pressure control valve, so that the expansion pressure of the plastic film is ensured;

3. According to the invention, the driving gear drives the stabilizing plate, the stabilizing rod and the stabilizing clamping block to move, when the stabilizing clamping block moves to the stabilizing groove position, the stabilizing spring pushes the stabilizing clamping block to enter the stabilizing groove, the driving gear can be limited, the driving gear is prevented from moving when not operated, and meanwhile, the driving gear drives the stabilizing clamping block to move, and the stabilizing clamping block can be separated from the stabilizing groove through the inclined plane.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of an extruder, a film blowing die, a converging wiping plate and a traction wheel in the invention;

FIG. 2 is a schematic view of the structure of the extruder, film blowing die, side plates and internal cooling unit of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2 in accordance with the present invention;

FIG. 4 is a schematic view of the structure of the film blowing mold, side plates and connecting box in the present invention;

FIG. 5 is an enlarged view of portion B of FIG. 4 in accordance with the present invention;

FIG. 6 is a schematic view of the structure of the film blowing die and the internal cooling unit in the present invention;

FIG. 7 is an enlarged view of portion C of FIG. 6 in accordance with the present invention;

FIG. 8 is a schematic view of the structure of the film blowing mold and the side plate in the present invention;

FIG. 9 is an enlarged view of portion D of FIG. 8 in accordance with the present invention;

FIG. 10 is a schematic view of the structure of the side plates, connecting box, switching assembly and transmission unit of the present invention;

FIG. 11 is an enlarged view of portion E of FIG. 10 in accordance with the present invention;

FIG. 12 is a schematic view of the inner cooling air ring, inner cooling air duct, inner exhaust duct and inner driving shaft according to the present invention.

In the figure, a machine 1, an extruder, a 2, a film blowing die, a 3, a beam-drawing wiping plate, a 4, an outer edge inserting assembly, a 41, an outer edge inserting frame, a 42, an outer driving belt piece, a 43, an outer driving screw, a 44, an outer driving screw, a 45, a fixed rod, a 5, an inner edge inserting assembly, a 51, an inner cooling unit, a 511, an inner cooling air ring, a 512, an inner cooling air pipe, a 513, an inner exhaust pipe, a 52, an inner edge inserting frame, a 53, an inner driving unit, a 531, an inner driving shaft, a 532, an inner driving gear, 533, an inner driving rack, 534, a fixed shell, 535, a sliding block, 536, an anti-falling plate, a 6, a switching assembly, a 61, a rectangular rod, a 62, a driving gear, a 63, a same-direction gear, a 64, a reversing gear, a 65, an output rod, a 66, a switching belt piece, a 67, a switching driving gear, a 68, a switching driven gear, a 69, a transmission unit, 691, a driving bevel gear, a 692, a driven bevel gear, 693, a 7, a frame, an 8, a side plate, a 9, a connection box, a 10, a rotating rod, a 11, a rotating rod, a 12, a pulling rod, a 12, a stable and a stable clamping plate, a 13, a stable clamping plate, and a stable clamping plate.

Detailed Description

The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to the embodiment shown in figures 1-12, the crease-resistant film blowing machine for producing packaging materials comprises an extruder 1 and a film blowing die 2, wherein the film blowing die 2 is arranged on the extruder 1, a beam-drawing wiping plate 3 is arranged above the film blowing die 2, outer edge inserting assemblies 4 are arranged on two sides of the beam-drawing wiping plate 3, a film blowing opening is formed in the film blowing die 2, and an inner edge inserting assembly 5 is arranged on the film blowing die 2 and positioned at the inner side of the film blowing opening;

the interpolation edge assembly 5 includes an internal cooling unit 51 and an interpolation edge frame 52;

The externally inserted edge component 4 comprises an externally inserted frame 41, and the externally inserted frame 41 is positioned between two internally inserted frames 52;

One side of the film blowing mould 2 is further provided with a switching component 6, the switching component 6 is provided with a homodromous mode, a reverse mode and a separation mode, when the switching component 6 is in the homodromous mode, the switching component 6 can drive the interpolation frame 52 and the external insertion 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 interpolation frame 52 and the external insertion frame 41 to move in the reverse direction, and when the switching component 6 is in the separation mode, the switching component 6 can respectively drive the interpolation frame 52 and the external insertion frame 41 to move.

The extruder 1 lets in molten plastic in the inflation film manufacturing mould 2, inflation film manufacturing mould 2 extrudes molten plastic through the inflation film manufacturing mouth, let in pressure gas in molten plastic, molten plastic expands into the plastic film under pressure gas's effect, inside frame 52 supports the plastic film in the plastic film, outside frame 41 supports the plastic film and inwards bends the plastic film, the plastic film is extruded into the slice through the receipts scrubbing plate 3 after bending, switching element 6 drives interpolation frame 52 and frame 41 syntropy under the syntropy mode, make interpolation frame 52 and frame 41 match the plastic film of different width, switching element 6 drives interpolation frame 52 and frame 41 anti-movement under the reverse mode, the adjustment is the width of inwards bending the plastic film, switching element 6 drives interpolation frame 52 and frame 41 removal respectively under the separation mode, the position of interpolation frame 52 and frame 41 is convenient in the adjustment.

The two interpolation frames 52 support the plastic film inside, the outer interpolation frame 41 supports the plastic film outside, the outer interpolation frame 41 is located between the two interpolation frames 52, the side edge of the plastic film is pushed to the center, the side edge of the plastic film faces the inner interpolation frame, simultaneously, the inner interpolation frame 52 and the outer interpolation frame 41 support the inside and the outside of the plastic film, the plastic film is prevented from being folded in the process of converging and diverging, the crease-resistant effect is better, and the positions of the inner interpolation frame 52 and the outer interpolation frame 41 can be adjusted, thereby supporting the plastic film with different widths, the switching component 6 drives the inner interpolation frame 52 and the outer interpolation frame 41 to move in the same direction mode, the switching component 6 adapts to different plastic film widths under the condition that the depth of the inserting edge of the plastic film is unchanged, the switching component 6 drives the inner interpolation frame 52 and the outer interpolation frame 41 to move in the opposite direction in the reverse mode, the depth of the plastic film inserting edge is adjusted, the adaptability is wider, the switching component 6 can independently drive the inner interpolation frame 52 and the outer interpolation frame 41 to move in the separation mode, and the positions of the inner interpolation frame 52 and the outer interpolation frame 41 are adjusted independently and conveniently.

Further, referring to fig. 1 to 12, the switching assembly 6 includes a rectangular bar 61, a driving gear 62, a same-direction gear 63, a reverse gear 64 and an output bar 65, the rectangular bar 61 can drive the external insertion frame 41 to move when rotating, the output bar 65 can drive the internal insertion frame 52 to move when rotating, a rectangular hole is formed in the driving gear 62, the rectangular bar 61 penetrates the driving gear 62 through the rectangular hole and is in sliding fit with the driving gear 62, the same-direction gear 63 can drive the output bar 65 to rotate in the same direction when rotating, and the reverse gear 64 can drive the output bar 65 to rotate in the reverse direction when rotating, and the driving gear 62 can sequentially mesh with the same-direction gear 63 and the reverse gear 64 when moving on the rectangular bar 61.

When the driving gear 62 moves to be not meshed with the same-direction gear 63 and the opposite-direction gear 64, the switching component 6 is in a separation mode, at the moment, the driving gear 62 is operated to rotate to drive the rectangular rod 61 to rotate, the rectangular rod 61 drives the external inserting frame 41 to move, the output rod 65 is operated to rotate, and the output rod 65 drives the internal inserting frame 52 to move;

When the driving gear 62 moves to be meshed with the same-direction gear 63, at the moment, 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 inserting 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 inserting frame 52 to move, and the moving directions of the internal inserting frame 52 and the external inserting frame 41 are consistent;

when the driving gear 62 moves to be meshed with the reversing gear 64, at this time, 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 inserting frame 41 to move, the driving gear 62 drives the reversing gear 64 to rotate, the reversing gear 64 drives the output rod 65 to reversely rotate, the output rod 65 drives the internal inserting frame 52 to move, and the moving direction of the internal inserting frame 52 is opposite to that of the external inserting frame 41.

The driving gear 62 is engaged with the rectangular bar 61, and the driving gear 62 is rotated while moving on the rectangular bar 61 to rotate the rectangular bar 61.

Further, referring to fig. 1-12, the outer hub assembly 4 further includes an outer drive belt member 42, an outer drive screw 43, an outer drive screw barrel 44, and a securing lever 45;

the outer driving screw 43 is inserted into the outer driving screw cylinder 44 and is in threaded fit with the outer driving screw cylinder 44, and the outer inserting frame 41 is fixedly arranged at one end of the outer driving screw 43 and one end of the fixing rod 45;

The outer driving belt member 42 includes an outer driving pulley fixedly mounted on the rectangular bar 61, an outer driven pulley fixedly mounted on the outer driving screw 44, and an outer driving belt connected to the outer driving pulley and the outer driven pulley.

When the rectangular rod 61 rotates, the rectangular rod 61 drives the outer inserting side driving belt pulley to rotate, the outer inserting side driving belt pulley drives the outer inserting side driving belt to rotate, the outer inserting side driving belt drives the outer inserting side driven belt pulley to rotate, the outer inserting side driven belt pulley drives the outer driving screw cylinder 44 to rotate, the outer driving screw cylinder 44 drives the outer driving screw 43 to move in the outer driving screw cylinder 44, and the outer driving screw 43 drives the outer inserting frame 41 to move.

The male driving pulleys in both male assemblies 4 are fixedly mounted on rectangular bars 61.

Further, referring to fig. 1 to 12, the switching assembly 6 further includes a switching belt member 66, a switching driving gear 67 and a switching driven gear 68, the switching belt member 66 includes a switching driving pulley, a switching driven pulley and a switching driving belt, the switching driving pulley is fixedly mounted on the same direction gear 63, the switching driven pulley is fixedly mounted on the output lever 65, the switching driving belt is connected to the switching driving pulley and the switching driven pulley, the switching driving gear 67 is fixedly mounted on the reverse gear 64, the switching driven gear 68 is fixedly mounted on the output lever 65, and the switching driving gear 67 and the switching driven gear 68 are engaged.

When the driving gear 62 is meshed 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 drives the switching driven pulley to rotate, the switching driven pulley drives the output rod 65 to rotate, the output rod 65 is consistent with the rectangular rod 61 in rotation direction, when the driving gear 62 is meshed 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 driven gear 68 to rotate, the switching driven gear 68 drives the output rod 65 to rotate, and the output rod 65 is opposite to the rectangular rod 61 in rotation direction.

Further, referring to fig. 1 to 12, the internal cooling unit 51 includes an internal cooling air ring 511, an internal cooling air pipe 512 and an internal exhaust pipe 513, the internal cooling air ring 511 is fixedly installed on the film blowing mold 2, the internal exhaust pipe 513 is fixedly installed on the film blowing mold 2, a plurality of exhaust holes are formed in a side wall of the internal exhaust pipe 513 near the top, the bottom of the internal exhaust pipe 513 penetrates through the film blowing mold 2 and extends outwards, and the internal cooling air pipe 512 is fixedly installed at the bottom of the internal cooling air ring 511 and is communicated with the internal cooling air ring 511, and the internal cooling air pipe 512 penetrates through the film blowing mold 2 and is connected with an internal cooling fan.

The inner cooling fan is used for introducing pressure gas into the inner cooling air ring 511, the inner cooling air ring 511 is used for introducing the pressure gas into the plastic film, the pressure gas expands the plastic film, meanwhile, the pressure gas takes away the heat of the plastic film, the plastic film is cooled and shaped, the pressure gas passes through the inner exhaust pipe 513, and a pressure control valve is arranged in the inner exhaust pipe 513 to ensure the pressure for expanding the plastic film.

The film blowing mould 2 is also provided with an external cooling air ring which is positioned outside the film blowing opening and cools the plastic film outside the plastic film.

Further, referring to fig. 1 to 12, the inner edge assembly 5 further includes an inner driving unit 53, and the inner driving unit 53 includes an inner driving shaft 531, an inner driving gear 532, and two inner driving racks 533, wherein the inner driving gear 532 is fixedly mounted on top of the inner driving shaft 531, the two inner driving racks 533 are respectively fixedly mounted on the corresponding inner edge frame 52, and the two inner driving racks 533 are respectively located at both sides of the inner driving gear 532 and engaged with the inner driving gear 532.

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

Further, referring to fig. 1 to 12, the inner driving unit 53 further includes a fixing housing 534, a sliding block 535 and a drop-preventing plate 536, the fixing housing 534 is fixedly installed on the inner exhaust duct 513, the inner driving shaft 531 is rotatably connected to the fixing housing 534, the sliding block 535 is fixedly installed in the fixing housing 534, a sliding groove is formed in the inner driving rack 533, the sliding block 535 is slidably engaged in the sliding groove, sliding holes are formed in two sides of the fixing housing 534, the inner driving rack 533 is slidably engaged in the sliding holes, and the drop-preventing plate 536 is fixedly installed at one end of the inner driving rack 533 far away from the inner insertion frame 52.

When the inner driving rack 533 moves, the sliding block 535 is driven to move, and 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 fig. 1 to 12, the switching assembly 6 further includes a transmission unit 69, the transmission unit 69 includes a connection shaft, a drive bevel gear 691, a driven bevel gear 692, and a transmission belt member 693, the drive bevel gear 691 is fixedly mounted on the output lever 65, the driven bevel gear 692 is fixedly mounted on the connection shaft, the drive bevel gear 691 is meshed with the driven bevel gear 692, the transmission belt member 693 includes a transmission driving pulley, a transmission driven pulley, and a transmission driving belt, the transmission driving pulley is fixedly mounted on the connection shaft, the transmission driven pulley is fixedly mounted on the inner driving shaft 531, and the transmission driving belt is connected to the transmission driving pulley and the transmission driven pulley.

When the output rod 65 rotates, the driving bevel gear 691 is driven to rotate, the driving bevel gear 691 drives the driven bevel gear 692 to rotate, the driven bevel gear 692 drives the connecting shaft to rotate, the connecting shaft drives the transmission driving belt pulley to rotate, the transmission driving belt pulley drives the transmission driving belt to rotate, the transmission driving belt drives the transmission driven belt pulley to rotate, and the transmission driven belt pulley drives the inner driving shaft 531 to rotate.

Further, referring to fig. 1-12, a frame 7 is provided on one side of the extruder 1, a side plate 8 is fixedly mounted on the frame 7, a harvest scrubbing plate 3 is fixedly mounted on the side plate 8, an external driving screw 44 is rotatably connected on the side plate 8, a fixed rod 45 penetrates through the side plate 8 and is in sliding fit 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 homodromous gear 63 and a reversing gear 64 are both rotatably connected on 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 penetrates through the connecting box 9 and is fixedly provided with a rotating block, a driving gear 62 is fixedly mounted with a rotating rod 10, the rotating rod 10 is sleeved on the rectangular rod 61, the rotating rod 10 penetrates through the connecting box 9 and is fixedly provided with a rotating handle, two traction wheels 11 are rotatably connected on the side plate 8, and the two traction wheels 11 are positioned above the harvest scrubbing plate 3;

The driving gear 62 is fixedly provided with a stabilizing plate 12, the stabilizing plate 12 is fixedly provided with a stabilizing spring 13, one end of the stabilizing spring 13 is fixedly provided with a stabilizing clamping block 14, one end of the stabilizing clamping block 14, which is close to the rectangular rod 61, is provided with a slope, one end of the stabilizing clamping block 14 is fixedly provided with a stabilizing rod 15, the stabilizing rod 15 penetrates through the stabilizing plate 12 and is in sliding fit with the stabilizing plate 12, and the rectangular rod 61 is provided with a stabilizing groove.

The plastic film is pulled and guided onto the wind-up roller by the two traction wheels 11, 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 clamping block 14 to move, when the stabilizing clamping block 14 moves to the stabilizing groove position, the stabilizing spring 13 pushes the stabilizing clamping block 14 to enter the stabilizing groove, the driving gear 62 can be limited, the driving gear 62 is prevented from moving when not operated, meanwhile, the driving gear 62 drives the stabilizing clamping block 14 to move, and the stabilizing clamping block 14 can be separated from the stabilizing groove through an inclined plane.

A crease-resistant film blowing method for producing packaging materials comprises the following steps:

The method comprises the steps that firstly, an extruder 1 introduces molten plastics into a film blowing die 2, the film blowing die 2 extrudes the molten plastics through a film blowing port, pressure gas is introduced into the molten plastics, and the molten plastics expand into plastic films under the action of the pressure gas;

the second step, the inner inserting frame 52 supports the plastic film inside the plastic film, and the two outer inserting frames 41 support the plastic film outside the plastic film and bend the plastic film inwards;

step three, extruding the bent plastic film into a sheet shape through a beam-shrinking and rubbing plate 3;

Step four, the switching component 6 drives the interpolation frame 52 and the extrapolation frame 41 to move in the same direction under the same direction mode, so that the interpolation frame 52 and the extrapolation frame 41 are matched with plastic films with different widths;

step five, the switching component 6 drives the interpolation frame 52 and the extrapolation frame 41 to reversely move in a reverse mode, and the width of inwards bending the plastic film is adjusted;

step six, the switching component 6 drives the interpolation frame 52 and the extrapolation frame 41 to move respectively in the separation mode, so that the positions of the interpolation frame 52 and the extrapolation frame 41 can be adjusted more conveniently.

It should be noted that the foregoing description is only a preferred embodiment of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, and any modifications, equivalents, improvements or changes thereof may be made without departing from the spirit and principle of the present invention.

Claims (7)

1. The crease-resistant film blowing machine for producing packaging materials comprises an extruder (1) and a film blowing die (2), and is characterized in that the film blowing die (2) is arranged on the extruder (1), a beam-collecting and wiping plate (3) is arranged above the film blowing die (2), outer edge inserting assemblies (4) are arranged on two sides of the beam-collecting and wiping plate (3), a film blowing opening is formed in the film blowing die (2), and an inner edge inserting assembly (5) is arranged on the film blowing die (2) and located at the inner side of the film blowing opening;

The interpolation edge assembly (5) comprises an internal cooling unit (51) and an interpolation frame (52);

The externally inserted edge component (4) comprises an externally inserted frame (41), and the externally inserted frame (41) is positioned between the two internally inserted frames (52);

One side of the film blowing die (2) is also provided with a switching component (6), the switching component (6) is provided with 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 interpolation 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 interpolation frame (52) and the external frame (41) to move in the reverse direction, and when the switching component (6) is in the separation mode, the switching component (6) can respectively drive the interpolation frame (52) and the external frame (41) to move;

The switching assembly (6) comprises a rectangular rod (61), a driving gear (62), a homodromous gear (63), a reversing gear (64) and an output rod (65), wherein the rectangular rod (61) can drive the externally inserted frame (41) to move when rotating, the output rod (65) can drive the internally inserted frame (52) to move when rotating, a rectangular hole is formed in the driving gear (62), the rectangular rod (61) penetrates through the driving gear (62) through the rectangular hole and is in sliding fit with the driving gear (62), the homodromous gear (63) can drive the output rod (65) to rotate in the same direction when rotating, the reversing gear (64) can drive the output rod (65) to rotate in the reverse direction when rotating, and the driving gear (62) can be sequentially meshed with the homodromous gear (63) and the reversing gear (64) when moving on the rectangular rod (61).

The switching assembly (6) further comprises a switching belt piece (66), a switching driving gear (67) and a switching driven gear (68), the switching belt piece (66) comprises a switching driving belt pulley, a switching driven belt pulley and a switching driving belt, the switching driving belt pulley is fixedly arranged on the same-direction gear (63), the switching driven belt pulley is fixedly arranged on the output rod (65), the switching driving belt is connected on the switching driving belt pulley and the switching driven belt pulley, the switching driving gear (67) is fixedly arranged on the reversing gear (64), the switching driven gear (68) is fixedly arranged on the output rod (65), and the switching driving gear (67) and the switching driven gear (68) are meshed;

The switching assembly (6) further comprises a transmission unit (69), the transmission unit (69) comprises a connecting shaft, a drive bevel gear (691), a driven bevel gear (692) and a transmission belt piece (693), the drive bevel gear (691) is fixedly installed on the output rod (65), the driven bevel gear (692) is fixedly installed on the connecting shaft, the drive bevel gear (691) is meshed with the driven bevel gear (692), the transmission belt piece (693) comprises a transmission driving pulley, a transmission driven pulley and a transmission driving belt, the transmission driving pulley is fixedly installed on the connecting shaft, and the transmission driving belt is connected on the transmission driving pulley and the transmission driven pulley.

2. The crease-resistant film blowing machine for producing packaging materials according to claim 1, wherein the externally inserted edge component (4) further comprises an externally driven belt piece (42), an externally driven screw (43), an externally driven screw cylinder (44) and a fixed rod (45);

The outer driving screw rod (43) is inserted into the outer driving screw cylinder (44) and is in threaded fit with the outer driving screw cylinder (44), and the outer inserting frame (41) is fixedly arranged at one end of the outer driving screw rod (43) and one end of the fixing rod (45);

The outer driving belt piece (42) comprises an outer inserting side driving belt pulley, an outer inserting side driven belt pulley and an outer inserting side driving belt, wherein the outer inserting side driving belt pulley is fixedly arranged on the rectangular rod (61), the outer inserting side driven belt pulley is fixedly arranged on the outer driving screw cylinder (44), and the outer inserting side driving belt is connected to the outer inserting side driving belt pulley and the outer inserting side driven belt pulley.

3. The crease-resistant film blowing machine for packaging material production according to claim 1, wherein the inner cooling unit (51) comprises an inner cooling air ring (511), an inner cooling air pipe (512) and an inner exhaust pipe (513), the inner cooling air ring (511) is fixedly installed on the film blowing die (2), the inner exhaust pipe (513) is fixedly installed on the film blowing die (2), a plurality of exhaust holes are formed in the side wall, close to the top, of the inner exhaust pipe (513), the bottom of the inner exhaust pipe (513) penetrates through the film blowing die (2) and extends outwards, the inner cooling air pipe (512) is fixedly installed at the bottom of the inner cooling air ring (511) and is communicated with the inner cooling air ring (511), and the inner cooling air pipe (512) penetrates through the film blowing die (2) and is connected with an inner cooling fan.

4. A crease-resistant film blowing machine for producing packaging materials according to claim 3, wherein the inner inserting edge assembly (5) further comprises an inner driving unit (53), the inner driving unit (53) comprises an inner driving shaft (531), an inner driving gear (532) and two inner driving racks (533), the inner driving gear (532) is fixedly arranged at the top of the inner driving shaft (531), the two inner driving racks (533) are respectively fixedly arranged on the corresponding inner inserting frame (52), the two inner driving racks (533) are respectively arranged at two sides of the inner driving gear (532) and meshed with the inner driving gear (532), and a transmission driven belt pulley is fixedly arranged on the inner driving shaft (531).

5. The crease-resistant inflation film manufacturing machine for packaging material production according to claim 4, wherein the inner driving unit (53) further comprises a fixing shell (534), a sliding block (535) and an anti-falling plate (536), the fixing shell (534) is fixedly installed on the inner exhaust pipe (513), the inner driving shaft (531) is rotationally connected to the fixing shell (534), the sliding block (535) is fixedly installed in the fixing shell (534), a sliding groove is formed in the inner driving rack (533), the sliding block (535) is in sliding fit in the sliding groove, sliding holes are formed in two sides of the fixing shell (534), the inner driving rack (533) is in sliding fit in the sliding holes, and the anti-falling plate (536) is fixedly installed at one end, far away from the inner inserting frame (52), of the inner driving rack (533).

6. The crease-resistant film blowing machine for packaging material production according to claim 2, wherein a frame (7) is arranged on one side of the extruder (1), a side plate (8) is fixedly arranged on the frame (7), the harvest scraping plate (3) is fixedly arranged on the side plate (8), the outer driving screw cylinder (44) is rotationally connected on the side plate (8), a fixed rod (45) penetrates through the side plate (8) and is in sliding fit with the side plate (8), a connecting box (9) is fixedly arranged on the side plate (8), a rectangular rod (61) is rotationally connected in the connecting box (9), a rotating shaft is fixedly arranged in the connecting box (9), a homodromous gear (63) and a reversing gear (64) are rotationally connected on the rotating shaft, the connecting shaft is rotationally connected in the connecting box (9), one end of the output rod (65) penetrates through the connecting box (9) and is fixedly provided with a fixed gear (62) which is rotationally connected with a driving sleeve (10), the two driving rods (10) are rotationally connected on the connecting box (10) and rotationally connected with the driving rod (10), two traction wheels (11) are positioned above the beam-converging and wiping plate (3);

Fixed mounting has firm board (12) on driving gear (62), fixed mounting has firm spring (13) on firm board (12), the one end fixed mounting of firm spring (13) has firm fixture block (14), firm fixture block (14) are close to the one end of rectangular rod (61) is the inclined plane setting, the one end fixed mounting of firm fixture block (14) has firm pole (15), firm pole (15) run through firm board (12) and with firm board (12) sliding fit, set up firm groove on rectangular rod (61).

7. A crease-resistant film blowing method for producing packaging materials, which is suitable for the crease-resistant film blowing machine for producing packaging materials, and is characterized by comprising the following steps:

The method comprises the steps that firstly, an extruder (1) is used for introducing molten plastics into a film blowing die (2), the film blowing die (2) is used for extruding the molten plastics through a film blowing port, pressure gas is introduced into the molten plastics, and the molten plastics expand into plastic films under the action of the pressure gas;

the second step, the inner inserting frame (52) supports the plastic film inside the plastic film, the outer inserting frame (41) supports the plastic film outside the plastic film and bends the plastic film inwards;

step three, extruding the bent plastic film into a sheet shape through a beam-shrinking and rubbing plate (3);

Step four, the switching component (6) drives the interpolation frame (52) and the external interpolation frame (41) to move in the same direction under the same-direction mode, so that the interpolation frame (52) and the external interpolation frame (41) are matched with plastic films with different widths;

Step five, the switching component (6) drives the interpolation frame (52) and the extrapolation frame (41) to reversely move in a reverse mode, and the width of inwards bending the plastic film is adjusted;

And step six, the switching component (6) drives the interpolation frame (52) and the external interpolation frame (41) to move respectively in a separation mode, and the positions of the interpolation frame (52) and the external interpolation frame (41) are independently adjusted.