CN117429129A

CN117429129A - Plastic bag sealing device

Info

Publication number: CN117429129A
Application number: CN202311676738.5A
Authority: CN
Inventors: 吕五洲; 马小妹; 吕美伟
Original assignee: Wuhu Shaozhou Packaging Products Co ltd
Current assignee: Wuhu Shaozhou Packaging Products Co ltd
Priority date: 2023-12-04
Filing date: 2023-12-04
Publication date: 2024-01-23

Abstract

The invention relates to the technical field of plastic bags, in particular to a plastic bag sealing device, which comprises a bottom plate, wherein a vertical plate is arranged at the upper end of the bottom plate, a longitudinal part of an L-shaped frame is arranged at the front end of the vertical plate, the vertical part of the L-shaped frame is arranged at the upper end of the bottom plate, a first guide roller is rotationally connected between the rear end of the vertical part of the L-shaped frame and the front end of the vertical plate, an auxiliary roller is rotationally connected between the two vertical parts of the U-shaped frame, a bidirectional screw is rotationally connected between the rear end of the vertical part of the L-shaped frame and the front end of the vertical plate, two nut seats are symmetrically and threadedly connected at the outer ends of the bidirectional screw, support arms are movably arranged at the upper ends of the two nut seats, the other ends of the two support arms are movably arranged at the lower end of the U-shaped frame, the rear end of the vertical plate is provided with a fixing part of first driving equipment, and the movable part of the first driving equipment is connected with the bidirectional screw.

Description

Plastic bag sealing device

Technical Field

The invention relates to a plastic bag sealing device, and belongs to the technical field of plastic bags.

Background

The plastic bag is used for containing other articles, in the manufacturing process of the plastic bag, the sealing is one of important procedures in the manufacturing of the plastic bag, one type adopts a sealing ironing knife to enable the sealing position of the plastic bag to be heated to be in a viscous flow state, and two layers of diaphragms are fused into a whole by means of certain pressure, and certain strength is maintained after cooling, so that the sealing operation is completed;

at present, in the process of sealing operation in plastic bag manufacture, a rolling structure is generally adopted to roll the sealed plastic bag, so that traction force is applied to the unsealed plastic bag, the unsealed plastic bag can move, and continuous sealing operation is ensured;

if in order to guarantee production efficiency, still take place the motion under traction force when sealing, easily produce to the position of sealing that scalds the sword contact with sealing and pull, and then make the position of sealing produce the damage probability great, influence the effect of sealing, if prevent to pull and produce, will pause the motion of plastic bag when sealing, can increase like this and seal whole time, and then influence production efficiency.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a plastic bag sealing device.

The technical scheme adopted for solving the technical problems is as follows: the plastic bag sealing device comprises a bottom plate, wherein a vertical plate is arranged at the upper end of the bottom plate, the left side of the front end of the vertical plate is rotationally connected with a discharging piece, a heat sealing piece is arranged at the front end of the vertical plate and positioned on the right side of the discharging piece, and the heat sealing piece is arranged at the upper end of the bottom plate;

the front end of the vertical plate is provided with a longitudinal part of an L-shaped frame, the L-shaped frame is positioned on the right side of the heat sealing piece, the vertical part of the L-shaped frame is arranged at the upper end of the bottom plate, and a first guide roller wheel is rotationally connected between the rear end of the vertical part of the L-shaped frame and the front end of the vertical plate;

a U-shaped frame is arranged right below the first guide roller, one vertical part of the U-shaped frame is in sliding connection with the rear end of the vertical part of the L-shaped frame, the other vertical part of the U-shaped frame is in sliding connection with the front end of the vertical plate, an auxiliary roller is rotationally connected between the two vertical parts of the U-shaped frame, the auxiliary roller extends out of the upper side of the U-shaped frame, and the auxiliary roller is located right below the first guide roller;

the two-way screw is rotationally connected between the rear end of the vertical part of the L-shaped frame and the front end of the vertical plate, the outer end of the two-way screw is symmetrically connected with two nut seats in a threaded mode, the upper ends of the nut seats are movably provided with support arms, the two support arms are arranged in an inverted V shape, the other ends of the support arms are movably arranged at the lower end of the U-shaped frame, the rear end of the vertical plate is provided with a fixing part of first driving equipment, and the movable part of the first driving equipment is connected with the two-way screw.

Further, a polish rod is arranged between the rear end of the vertical part of the L-shaped frame and the front end of the vertical plate, and is positioned right below the bidirectional screw rod, and penetrates through the two nut seats, and the two nut seats are in sliding connection with the polish rod.

Further, the heat seal piece comprises a shell, the shell is arranged on the front end of the vertical plate, a bottom box is arranged at the lower end of the shell, and the bottom box is fixed at the upper end of the bottom plate;

the left end face of the shell is recessed rightwards to form an inlet, the inlet extends to the inner wall of the shell, the right end face of the shell is recessed leftwards to form an outlet, the outlet extends to the inner wall of the shell, the outlet is positioned on the right side of the inlet, and a power supply device for providing electric energy is arranged in the bottom box;

the inside of the shell is connected with a movable plate in a sliding manner, the movable plate is positioned above the inlet, a sealing ironing knife is arranged in the middle of the lower end of the movable plate, two auxiliary devices are symmetrically arranged between the lower end of the movable plate and the bottom end inside the shell, and the two auxiliary devices are positioned on the front side and the rear side of the sealing ironing knife;

the inside of the shell is rotationally connected with a driving shaft, the driving shaft penetrates through the shell and is rotationally connected with a vertical plate, the driving shaft is positioned on the upper side of the movable plate, the rear end of the vertical plate is provided with a fixed part of second driving equipment, and the movable part of the second driving equipment is connected with the driving shaft;

the inside semicircle piece that sets up of shell, and semicircle piece arranges along drive shaft length direction, the semicircle piece is located the drive shaft directly over, and the face up of semicircle piece arranges, the equidistance sets up a plurality of connecting rods between semicircle piece and the drive shaft.

Further, the auxiliary device comprises a pressing rod and a straight cylinder, the pressing rod is arranged at the lower end of the movable plate, the straight cylinder is arranged at the bottom end inside the shell, and the straight cylinder is positioned at the outer side of the sealing ironing knife;

the compression bar is arranged at the upper end of the straight cylinder, the lower end of the compression bar extends into the straight cylinder, the lower end of the compression bar is provided with a guide disc, the guide disc is connected in the straight cylinder in a sliding manner, and a second elastic piece is arranged between the lower end of the guide disc and the bottom end of the inner wall of the straight cylinder;

the straight section of thick bamboo inner wall outwards caves in and forms the draw-in groove, the mounting locating part on the draw-in groove, the locating part laminating is in the guide disc upper end, and the locating part is located the depression bar outside.

Further, two fixing plates are symmetrically arranged at the left end of the shell, the two fixing plates are positioned at the front side and the rear side of the inlet, two rotating shafts are symmetrically connected between the two fixing plates in a rotating mode, and the two rotating shafts are positioned at the upper side and the lower side of the inlet;

the outer end of the rotating shaft is symmetrically provided with two spiral plates which are oppositely arranged, the front end of the fixed plate positioned at the front side is provided with a fixed part of third driving equipment, and a movable part of the third driving equipment is connected with one rotating shaft;

the two function gears are arranged on the rear side of the fixing plate at the rear side and meshed with each other, the function gears are arranged on the front side of the vertical plate, and the rear ends of the two rotating shafts penetrate through the fixing plate at the rear side and are connected with the two function gears respectively.

Further, the discharging piece comprises a rotating shaft, the rotating shaft is rotationally connected to the front end of the vertical plate, the rear end of the vertical plate is rotationally connected with the damping gear, the upper end of the damping gear is meshed with the auxiliary gear, and the rear end of the rotating shaft penetrates through the vertical plate and is connected with the auxiliary gear;

the baffle is arranged at the rear side of the outer end of the rotating shaft, the front end of the vertical plate is rotationally connected with a second guide roller, the second guide roller is positioned at the right side of the baffle, and the second guide roller is positioned at the left side of the fixed plate.

Further, the front end of the rotating shaft is attached to the supporting plate, the front end surface of the supporting plate is recessed backwards to form a U-shaped groove, the U-shaped groove penetrates through the supporting plate, the U-shaped groove extends to the upper end of the supporting plate, a cylinder is arranged in the middle of the front end of the rotating shaft, and the cylinder penetrates through the U-shaped groove;

the middle part of the lower end of the supporting plate is provided with a movable part of the lifting equipment, a fixed part of the lifting equipment is arranged on the upper end of the bottom plate, two guide pieces are symmetrically arranged between the supporting plate and the bottom plate, and the two guide pieces are positioned on the left side and the right side of the lifting equipment;

the inner wall of the U-shaped groove is provided with a plurality of fixed parts of rolling members at equal intervals, and the movable parts of the rolling members are connected to the outer end of the lower part of the cylinder in a rolling way.

The invention has the beneficial effects that:

1. through third motor, two-way screw rod, two nut seats and two support arms, make U type frame and supplementary running roller upward movement, and then lie in the plastic bag material between supplementary running roller and the first guide roll and relax the processing, and the plastic bag material that is relaxed can be pulled and normally move, and make the traction force that lies in the left plastic bag material of first guide roll disappear, and then make the plastic bag material stop moving in the shell, realize sealing the operation under the incessant state, effectively avoid producing to pull to sealing the position because of the motion of plastic bag material, promote sealing effect, guarantee work efficiency.

2. Utilize electric putter, make the cylinder contact with the movable part of a plurality of ox eyeballs again, realize the convenient of rolling type plastic bag material and get and put on the one hand, and the accessible layer board will restrict to install in the pivot with the baffle, on the other hand adopts the layer board to lift cylinder and pivot, effectively reduce the pivot and take place deformation probability, promote life, and guarantee the blowing effect, and utilize auxiliary gear and damping gear, effectively reduce the pivot and appear excessively rotating probability because of the inertia that the blowing produced, the relaxation probability appears in the plastic bag material of effectively reducing the blowing, guarantee the blowing effect.

3. The clamping spring is matched with the clamping groove for use, so that the guide disc is limited to be installed on the straight cylinder, convenient disassembly and assembly between the compression bar and the straight cylinder are realized, and the sealing ironing knife and the movable plate are convenient to disassemble and assemble, so that maintenance is convenient.

4. Through first motor and two function gears, make two spin to rotate in step to make four screw plates that are located both ends about the plastic bag material carry out synchronous revolution, thereby all carry out the processing of holding up in the middle of the upper and lower both ends to the plastic bag material, and then get rid of the fold on the plastic bag material, effectively avoid influencing follow-up operation of sealing because of fold on the plastic bag material, promote the effect of sealing.

5. Through second motor, drive shaft and a plurality of connecting rod, make the semicircle piece take place to rotate, after the round surface portion and the fly leaf upper end contact of semicircle piece, exert pressure on the fly leaf through the semicircle piece, and then make to seal the boiling hot sword and receive even down force, effectively reduce and appear the inhomogeneous probability of heat-seal, effectively guarantee to seal the effect.

6. The U-shaped auxiliary frame and the extrusion roller move downwards through repulsive force generated between the electromagnet and the magnetic plate, and the plastic bag material is clamped by the extrusion roller and the first guide roller, so that the falling phenomenon of the plastic bag material positioned on the left side of the first guide roller is effectively avoided, the loosening probability of the plastic bag material positioned in the shell due to falling is effectively reduced, and the sealing effect is ensured.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a plastic bag sealing device according to the present invention;

FIG. 2 is a perspective view of a plastic bag closure apparatus according to the present invention;

FIG. 3 is a front view of a plastic bag closure of the present invention;

FIG. 4 is a diagram showing the assembly of an L-shaped frame, a first guide roller, an auxiliary roller, a U-shaped frame, a nut seat, a support arm and a bidirectional screw in a plastic bag sealing device according to the present invention;

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is a perspective view of the housing of the plastic bag closure of the present invention;

FIG. 7 is a cross-sectional view of the housing of the plastic bag closure of the present invention;

FIG. 8 is an enlarged view of portion A of FIG. 7;

FIG. 9 is an assembly view of a semicircular block and a connecting rod in a plastic bag sealing device according to the present invention;

fig. 10 is an assembly view of a fixing plate, a screw plate, a rotation shaft and a functional gear in a plastic bag sealing device according to the present invention.

In the figure: 1. the vertical plate, 2, the shell, 3, the L-shaped frame, 4, a first guide roller, 5, an auxiliary roller, 6, a U-shaped frame, 7, a nut seat, 8, a support arm, 9, a bidirectional screw, 10, a bottom plate, 11, a second guide roller, 12, an electric push rod, 13, a cylinder, 14, a supporting plate, 15, a U-shaped groove, 16, a rotating shaft, 17, a baffle, 18, an auxiliary gear, 19, a damping gear, 21, a bottom box, 22, a first motor, 23, a second motor, 24, a fixed plate, 25, a driving shaft, 26, a semicircular block, 27, a connecting rod, 28, a movable plate, 29, a sealing iron, 31, a guide rod, 32, a U-shaped auxiliary frame, 33, a squeeze roller, 34, a polish rod, 35, a third motor, 36, a magnetic plate, 37, a first elastic piece, 38, an electromagnet, 241, a spiral plate, 242, a rotating shaft 243, a function gear, 281, a pressing rod, 282, a straight cylinder 283, a second elastic piece, 284, a guide disc, a clamp spring.

Detailed Description

The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.

Embodiment one:

before plastic bag seals, generally will wrap-up plastic bag material suit is to the axostylus axostyle outer end on, then with the axostylus axostyle cartridge dress to the blowing structure on, and make pivot 16 can rotate on the blowing structure, thereby guarantee that wrap-up plastic bag material can carry out the blowing motion, in order to guarantee that pivot 16 can carry out normal blowing motion, contact connection between pivot 16 and the blowing structure, but in carrying out the blowing motion, wrap-up plastic bag material can produce the inertia along the blowing direction in the blowing, it is great to lead to pivot 16 to appear excessive rotation probability because of inertia, the relaxation probability is great to cause the plastic bag material of blowing to appear, the blowing effect is poor.

In order to solve the above problems, as shown in fig. 1, 2 and 3, the present invention provides a technical solution: a plastic bag sealing device comprises a bottom plate 10, wherein a vertical plate 1 is arranged at the upper end of the bottom plate 10, and a mounting carrier is provided for the vertical plate 1 through the bottom plate 10;

the front end of the vertical plate 1 is rotationally connected with a rotating shaft 16, a damping gear 19 is rotationally connected to the rear end of the vertical plate 1, the rear end of the rotating shaft 16 penetrates through the vertical plate 1 and is connected with an auxiliary gear 18 meshed with the upper end of the damping gear 19, the auxiliary gear 18 is matched with the damping gear 19 for use, and the rotation of the rotating shaft 16 can be damped, so that the discharging operation is more stable;

the baffle 17 is arranged on the rear side of the outer end of the rotating shaft 16, the supporting plate 14 is attached to the front end of the rotating shaft 16, and the supporting plate 14 is matched with the baffle 17 for use, so that the coiled plastic bag material can be limited on the outer end of the rotating shaft 16;

the front end surface of the supporting plate 14 is recessed backwards to form a U-shaped groove 15 penetrating through the supporting plate 14 and extending to the upper end of the supporting plate 14, a cylinder 13 penetrating through the U-shaped groove 15 is arranged on the middle part of the front end of a rotating shaft 16, a plurality of movable parts are arranged on the inner wall of the U-shaped groove 15 at equal intervals in a rolling way, a plurality of rolling members are matched for use, rotation of the cylinder 13 and the rotating shaft 16 can be assisted, and the rolling members can be cow eyeballs;

the movable part of the lifting device with the fixed part arranged at the upper end of the bottom plate 10 is arranged at the middle position of the lower end of the supporting plate 14, the supporting plate 14 is driven to move up and down by the lifting device, the lifting device can adopt an electric push rod 12, two guide pieces positioned at the left side and the right side of the lifting device are symmetrically arranged between the supporting plate 14 and the bottom plate 10, the two guide pieces are matched for use, the supporting plate 14 can move for guiding, and the guide pieces can adopt telescopic rods;

the second guide roller 11 positioned on the right side of the baffle 17 and positioned on the left side of the fixed plate 24 is rotationally connected to the front end of the vertical plate 1, and the discharged plastic bag material is guided by the second guide roller 11, so that the plastic bag material stably enters a subsequent processing station.

When the lifting device is used, the lifting device is started firstly, so that the supporting plate 14 is driven to move downwards to a limit position, the supporting plate 14 and the cylinder 13 are separated, then the coiled plastic bag material is sleeved on the outer end of the rotating shaft 16 and is contacted with the baffle 17, and the coiled plastic bag material is positioned and installed on the rotating shaft 16;

then, the supporting plate 14 is moved upwards by lifting equipment to return to the original position, so that the cylinder 13 is contacted with movable parts of a plurality of bovine eyeballs again, on one hand, the convenient taking and placing of the coiled plastic bag materials are realized, the coiled plastic bag materials can be limited and installed on the rotating shaft 16 through the supporting plate 14 and the baffle 17, on the other hand, the supporting plate 14 is adopted to lift the cylinder 13 and the rotating shaft 16, the deformation probability of the rotating shaft 16 is effectively reduced, the service life is prolonged, and the discharging effect is ensured;

in addition, when the coiled plastic bag material is discharged, the rotating shaft 16 can rotate, the auxiliary gear 18 is further rotated, and the auxiliary gear 18 is meshed with the damping gear 19, so that the damping gear 19 can damp the rotation of the auxiliary gear 18 and the rotating shaft 16, the probability of excessive rotation of the rotating shaft 16 due to inertia generated by discharging is effectively reduced, the probability of loosening of the discharged plastic bag material is effectively reduced, and the discharging effect is ensured;

in addition, in the rotating process of the rotating shaft 16, a plurality of bovine eyeballs are matched for use, so that the cylinder 13 can be assisted to rotate, and the rotating shaft 16 is ensured to perform normal discharging movement.

Embodiment two:

the sealing operation is generally carried out on the plastic bag by adopting the sealing ironing knife 29, and the sealing ironing knife 29 is driven to move up and down by adopting lifting equipment such as a hydraulic cylinder and the like, but in the sealing movement, the lower pressure can only be applied to the connecting position of the sealing ironing knife 29 and the lifting equipment, so that the sealing ironing knife 29 is easy to generate uneven stress phenomenon in the heat sealing application, the sealing position of the plastic bag is high in incomplete heat sealing probability, and the sealing effect is poor.

In order to solve the above problems, as shown in fig. 1, 2, 3, 6, 7, 8, 9 and 10, a case 2 is installed on the front end of a riser 1, a bottom case 21 fixed on the upper end of a base plate 10 is installed on the lower end of the case 2, and a power supply for supplying electric power is installed in the bottom case 21, and the case 2 is lifted by the bottom case 21, and on the other hand, an installation space for the power supply and the like is provided, and other electric devices are supplied with electric power by the power supply;

an inlet extending to the inner wall of the shell 2 is formed on the right side of the left end face of the shell 2 in a recessed manner, plastic bag materials enter the shell 2 through the inlet, an outlet extending to the inner wall of the shell 2 and positioned on the right side of the inlet is formed on the left side of the right end face of the shell 2 in a recessed manner, and the plastic bag materials sealed in the shell 2 are removed from the shell 2 through the outlet;

a movable plate 28 positioned above the inlet is connected in the shell 2 in a sliding way, a mounting carrier is provided for a sealing ironing knife 29 through the movable plate 28, the sealing ironing knife 29 is arranged on the middle part of the lower end of the movable plate 28, and the sealing ironing knife 29 is utilized to seal plastic bag materials;

two straight cylinders 282 positioned at the front side and the rear side of the sealing ironing knife 29 are symmetrically arranged at the bottom end inside the shell 2, two pressing rods 281 positioned at the outer side of the sealing ironing knife 29 and arranged at the upper end of the straight cylinders 282 and the lower end of which extends into the straight cylinders 282 are symmetrically arranged at the lower end of the movable plate 28, a guide disc 284 arranged at the lower end of the pressing rods 281 is slidably connected in the straight cylinders 282, and the pressing rods 281, the guide disc 284 and the straight cylinders 282 are matched for use to guide the movement of the movable plate 28 and the sealing ironing knife 29;

a clamping groove is formed by outwards sinking the inner wall of the straight barrel 282, a mounting space is provided for the limiting piece by utilizing the clamping groove, a second elastic piece 283 is arranged between the lower end of the guide disc 284 and the bottom end of the inner wall of the straight barrel 282, the guide disc 284 and other parts are returned to the original position by the second elastic piece 283, the second elastic piece 283 can adopt a spring, the limiting piece which is attached to the upper end of the guide disc 284 and is positioned at the outer side of the pressure lever 281 is assembled on the clamping groove, and the guide disc 284 is limited and mounted in the straight barrel 282 by the limiting piece;

a driving shaft 25 passing through the housing 2 and rotatably connected with the vertical plate 1 and positioned at the upper side of the movable plate 28 is rotatably connected on the inside of the housing 2, and a movable part of a second driving device with a fixed part mounted at the rear end of the vertical plate 1 is connected with the driving shaft 25, and the driving shaft 25 is rotated by the second driving device, and the second driving device can adopt a second motor 23;

a semicircular block 26 which is arranged along the length direction of the driving shaft 25 and is positioned right above the driving shaft 25 and is arranged with the round surface part upwards is arranged in the shell 2, a plurality of connecting rods 27 are equidistantly arranged between the semicircular block 26 and the driving shaft 25, the plurality of connecting rods 27 are matched for use, the semicircular block 26 is connected with the driving shaft 25, and the movable plate 28 is moved downwards by utilizing the semicircular block 26;

two fixing plates 24 positioned at the front side and the rear side of the inlet are symmetrically arranged on the left end of the shell 2, two rotating shafts 242 positioned at the upper side and the lower side of the inlet are rotatably connected between the two fixing plates 24, the movable part of a third driving device with a fixing part arranged at the front end of the fixing plate 24 positioned at the front side is connected with one rotating shaft 242, one rotating shaft 242 is driven to rotate through the third driving device, and the third driving device can adopt the first motor 22;

two mutually meshed functional gears 243 positioned on the front side of the vertical plate 1 are arranged on the rear side of the fixed plate 24 positioned on the rear side, the two functional gears 243 are matched for use, the two rotary shafts 242 synchronously rotate, the rotary shafts 242 with the rear ends penetrating through the fixed plate 24 positioned on the rear side are respectively connected with the two functional gears 243, the two oppositely arranged spiral plates 241 are symmetrically arranged on the outer ends of the rotary shafts 242, and the two spiral plates 241 are matched for use, so that plastic bag materials can be leveled.

During assembly, the second elastic piece 283 is placed in the straight barrel 282, then the guide disc 284 is inserted into the straight barrel 282 and is communicated with the upper end of the second elastic piece 283, and then the clamp spring 285 is assembled on the clamping groove, so that the guide disc 284 is limited to be installed on the straight barrel 282, and the compression rod 281 and the straight barrel 282 are conveniently and quickly disassembled, so that the sealing ironing knife 29 and the movable plate 28 are conveniently and quickly disassembled and assembled, and the maintenance is convenient;

when in use, the plastic bag material moves between the two rotating shafts 242, and the upper end and the lower end of the plastic bag material are respectively attached with the two oppositely arranged spiral plates 241, and meanwhile, the third driving equipment is started, so that the corresponding rotating shafts 242 and the functional gears 243 are driven to rotate;

the other functional gear 243 is rotated to further rotate the other rotating shaft 242, so that the two rotating shafts 242 synchronously rotate to further synchronously rotate the four spiral plates 241 positioned at the upper end and the lower end of the plastic bag material, and thus, an outward pulling force is applied to the upper end and the lower end of the plastic bag material;

thus, the upper end and the lower end of the plastic bag material are leveled, wrinkles on the plastic bag material are removed, the influence on the subsequent sealing operation caused by the wrinkles on the plastic bag material is effectively avoided, and the sealing effect is improved;

the flattened plastic bag material enters the shell 2 through the inlet, and after the plastic bag material moves in the shell 2 for a preset time, the second driving device is started, so that the driving shaft 25 rotates, the connecting rods 27 rotate, and the semicircular blocks 26 rotate;

when the upper end of the movable plate 28 is contacted with the round surface of the semicircular block 26, the movable plate 28 moves downwards, so that the sealing ironing knife 29, the pressing rod 281 and the guide plate 284 move downwards, the second elastic piece 283 is compressed, the second elastic piece 283 generates elastic force, and the sealing ironing knife 29 moves downwards to heat-seal the plastic bag material, so that the sealing operation is completed;

when the round surface of the semicircular block 26 is separated from the upper end of the movable plate 28, the guide plate 284, the compression bar 281 and the movable plate 28 are moved upwards under the action of the elastic force of the second elastic member 283, so that the sealing ironing knife 29 is moved upwards to return to the original position, and the steps are repeated, so that continuous sealing operation is performed on the plastic bag material;

the semicircular block 26 applies pressure on the movable plate 28, so that the sealing ironing knife 29 is subjected to uniform downward pressure, the occurrence of uneven heat sealing probability is effectively reduced, and the sealing effect is effectively ensured.

Embodiment III:

as shown in fig. 1, 2, 3, 4 and 5, a longitudinal part of an L-shaped frame 3 which is positioned on the right side of a shell 2 and has a vertical part arranged at the upper end of a bottom plate 10 is mounted on the front end of a riser 1, the L-shaped frame 3 is utilized to provide a mounting carrier for components such as a first guide roller and the like, the first guide roller 4 is rotatably connected between the rear end of the vertical part of the L-shaped frame 3 and the front end of the riser 1, and a plastic bag material sealed in the shell 2 is guided by the first guide roller to ensure that the plastic bag material is in a horizontal state in the shell 2;

one vertical part of the U-shaped frame 6 positioned right below the first guide roller 4 is in sliding connection with the rear end of the vertical part of the L-shaped frame 3 through a sliding rail, the other vertical part of the U-shaped frame 6 is in sliding connection with the front end of the vertical plate 1 through a sliding rail, an auxiliary roller 5 extending out of the upper side of the U-shaped frame 6 and positioned right below the first guide roller 4 is rotationally connected between the two vertical parts of the U-shaped frame 6, and an installation carrier is provided for the auxiliary roller 5 through the U-shaped frame 6;

the bidirectional screw 9 is rotationally connected between the rear end of the vertical part of the L-shaped frame 3 and the front end of the vertical plate 1, the movable part of a first driving device with a fixed part arranged at the rear end of the vertical plate 1 is connected with the bidirectional screw 9, the bidirectional screw 9 is driven to rotate by the first driving device, and the first driving device can adopt a third motor 35;

the two nut seats 7 are symmetrically and threadedly connected to the outer ends of the bidirectional screw rods 9, two support arms 8 which are arranged in an inverted V shape are respectively and movably installed at the upper ends of the two nut seats 7, the other ends of the two support arms 8 are movably arranged at the lower ends of the U-shaped frames 6, and the two nut seats 7 are made to perform relative movement through the bidirectional screw rods 9, and the two support arms 8 are matched for use so that the U-shaped frames 6 move up and down;

the polish rod 34 positioned right below the bidirectional screw 9 is arranged between the rear end of the vertical part of the L-shaped frame 3 and the front end of the vertical plate 1, the polish rod 34 penetrating through the two nut seats 7 is respectively connected with the two nut seats 7 in a sliding way, and the movement of the nut seats 7 is guided through the polish rod 34.

During assembly, the movable end of the plastic bag material is wound on the outer end of the left part of the first guide roller 4, the movable end of the plastic bag material is wound on the outer end of the lower part of the auxiliary roller 5 from the left end direction of the auxiliary roller 5, and then the movable end of the plastic bag material is connected with traction equipment, so that the sealed plastic bag material can be wound;

when the plastic bag material is sealed, the plastic bag material still moves under the traction action, and meanwhile, the first driving equipment is driven to drive the bidirectional screw rod 9 to rotate forwards, so that the two nut seats 7 move inwards, the lower parts of the two support arms 8 move inwards, and the upper parts of the two support arms 8 move upwards;

the U-shaped frame 6 and the auxiliary roller 5 move upwards, so that the plastic bag material positioned between the auxiliary roller 5 and the first guide roller is loosened, the loosened plastic bag material is pulled to normally move, the traction force of the plastic bag material positioned on the left side of the first guide roller is eliminated, the plastic bag material stops moving in the shell 2, sealing operation is realized in a non-stop state, pulling of a sealing position due to movement of the plastic bag material is effectively avoided, a sealing effect is improved, and working efficiency is guaranteed;

after the sealing is finished, the bidirectional screw 9 is reversely rotated through the first driving equipment, so that the nut seat 7, the support arm 8, the U-shaped frame 6 and the auxiliary roller 5 are all returned to the original positions, and further the plastic bag material positioned between the auxiliary roller 5 and the first guide roller is tensioned again, and the plastic bag material positioned on the left side of the first guide roller is pulled again and moves, so that the plastic bag material moves normally.

Embodiment four:

when the plastic bag material positioned between the auxiliary roller 5 and the first guide roller is loosened, the plastic bag material between the shell 2 and the first guide roller is easy to fall under the action of the weight of the plastic bag material, so that the loosening probability of the plastic bag material positioned in the shell 2 is high, and the sealing effect is influenced.

In order to solve the above problems, as shown in fig. 1, 2, 3, 4 and 8, a squeeze roller 33 extending out of the lower side of the U-shaped auxiliary frame 32 and located right above the first guide roller is rotatably connected between two vertical portions of the U-shaped auxiliary frame 32 located in the L-shaped frame 3, and an installation carrier is provided for the squeeze roller 33 through the U-shaped auxiliary frame 32;

two guide rods 31 are symmetrically arranged at the upper end of the U-shaped auxiliary frame 32, the two guide rods 31 penetrating through the longitudinal part of the L-shaped frame 3 are in sliding connection with the L-shaped frame 3, the two guide rods 31 are matched for use to guide the movement of the U-shaped auxiliary frame 32, two first elastic pieces 37 positioned at the outer sides of the guide rods 31 are symmetrically arranged between the upper end of the U-shaped auxiliary frame 32 and the lower end of the longitudinal part of the L-shaped frame 3, the two first elastic pieces 37 are matched for use to enable the U-shaped auxiliary frame 32 to return to the original position, and the first elastic pieces 37 can adopt springs;

an electromagnet 38 between two first elastic members 37 is mounted to the lower end of the longitudinal portion of the L-shaped frame 3, and a magnetic plate 36 is fitted to the upper end of the U-shaped auxiliary frame 32, with the magnetic plate 36 fitted to the lower end of the electromagnet 38, and the electromagnet 38 and the magnetic plate 36 are disposed in a mutually exclusive manner.

In the sealing process, a circuit of the electromagnet 38 is connected, so that repulsive force is generated between the electromagnet 38 and the magnetic plate 36, and under the action of the repulsive force, the U-shaped auxiliary frame 32 and the squeeze roller 33 move downwards, so that the first elastic piece 37 is stretched, and the first elastic piece 37 generates elastic force;

the extrusion roller 33 and the first guide roller are used for clamping the plastic bag material, so that the falling phenomenon of the plastic bag material positioned at the left side of the first guide roller is effectively avoided, the loosening probability of the plastic bag material positioned in the shell 2 due to falling is effectively reduced, and the sealing effect is ensured;

after the sealing is completed, the circuit of the electromagnet 38 is disconnected, so that the repulsive force between the electromagnet 38 and the magnetic plate 36 disappears, and the U-shaped auxiliary frame 32 and the extrusion roller 33 can be moved upwards to return to the original position under the action of the elastic force of the first elastic piece 37, so that the plastic bag material can normally move.

Although the present disclosure describes embodiments, not every embodiment is described in terms of a single embodiment, and such description is for clarity only, and one skilled in the art will recognize that the embodiments described in the disclosure as a whole may be combined appropriately to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A plastic bag sealing device, characterized in that: the automatic feeding device comprises a bottom plate (10), wherein a vertical plate (1) is arranged at the upper end of the bottom plate (10), the left side of the front end of the vertical plate (1) is rotationally connected with a discharging piece, a heat sealing piece is arranged at the front end of the vertical plate (1) and is positioned on the right side of the discharging piece, and the heat sealing piece is arranged at the upper end of the bottom plate (10);

the front end of the vertical plate (1) is provided with a longitudinal part of an L-shaped frame (3), the L-shaped frame (3) is positioned on the right side of the heat sealing piece, the vertical part of the L-shaped frame (3) is arranged at the upper end of the bottom plate (10), and a first guide roller (4) is rotationally connected between the rear end of the vertical part of the L-shaped frame (3) and the front end of the vertical plate (1);

a U-shaped frame (6) is arranged right below the first guide roller (4), one vertical part of the U-shaped frame (6) is in sliding connection with the rear end of the vertical part of the L-shaped frame (3), the other vertical part of the U-shaped frame (6) is in sliding connection with the front end of the vertical plate (1) to form the U-shaped frame (6), an auxiliary roller (5) is rotatably connected between the two vertical parts of the U-shaped frame (6), the auxiliary roller (5) extends out of the upper side of the U-shaped frame (6), and the auxiliary roller (5) is located right below the first guide roller (4);

the novel screw structure is characterized in that a bidirectional screw rod (9) is rotationally connected between the rear end of the vertical part of the L-shaped frame (3) and the front end of the vertical plate (1), two nut seats (7) are symmetrically connected with the outer end of the bidirectional screw rod (9) in a threaded mode, two support arms (8) are movably installed at the upper ends of the nut seats (7), the two support arms (8) are arranged in an inverted V shape, the other ends of the support arms (8) are movably arranged at the lower end of the U-shaped frame (6), the rear end of the vertical plate (1) is provided with a fixing part of first driving equipment, and the movable part of the first driving equipment is connected with the bidirectional screw rod (9).

2. The plastic bag closure apparatus according to claim 1, wherein: a polish rod (34) is arranged between the rear end of the vertical part of the L-shaped frame (3) and the front end of the vertical plate (1), the polish rod (34) is located under the bidirectional screw rod (9), the polish rod (34) penetrates through the two nut seats (7), and the two nut seats (7) are in sliding connection with the polish rod (34).

3. The plastic bag closure apparatus according to claim 1, wherein: the heat sealing piece comprises a shell (2), the shell (2) is arranged at the front end of the vertical plate (1), a bottom box (21) is arranged at the lower end of the shell (2), and the bottom box (21) is fixed at the upper end of the bottom plate (10);

the left end face of the shell (2) is recessed rightwards to form an inlet, the inlet extends to the inner wall of the shell (2), the right end face of the shell (2) is recessed leftwards to form an outlet, the outlet extends to the inner wall of the shell (2), the outlet is positioned on the right side of the inlet, and a power supply for providing electric energy is arranged in the bottom box (21);

the inside of the shell (2) is connected with a movable plate (28) in a sliding manner, the movable plate (28) is positioned above the inlet, a sealing ironing knife (29) is arranged in the middle of the lower end of the movable plate (28), two auxiliary devices are symmetrically arranged between the lower end of the movable plate (28) and the bottom end inside the shell (2), and the two auxiliary devices are positioned on the front side and the rear side of the sealing ironing knife (29);

the inside of the shell (2) is rotationally connected with a driving shaft (25), the driving shaft (25) penetrates through the shell (2) and is rotationally connected with the vertical plate (1), the driving shaft (25) is positioned on the upper side of the movable plate (28), the rear end of the vertical plate (1) is provided with a fixed part of second driving equipment, and the movable part of the second driving equipment is connected with the driving shaft (25);

the inside semicircle piece (26) that sets up of shell (2), and semicircle piece (26) are arranged along drive shaft (25) length direction, semicircle piece (26) are located drive shaft (25) directly over, and the round face up of semicircle piece (26) is arranged, equidistance sets up a plurality of connecting rods (27) between semicircle piece (26) and drive shaft (25).

4. A plastic bag closure apparatus according to claim 3, wherein: the auxiliary device comprises a pressing rod (281) and a straight cylinder (282), the pressing rod (281) is arranged at the lower end of the movable plate (28), the straight cylinder (282) is arranged at the bottom end inside the shell (2), and the straight cylinder (282) is positioned at the outer side of the sealing ironing knife (29);

the compression bar (281) is arranged at the upper end of the straight cylinder (282), the lower end of the compression bar (281) extends into the straight cylinder (282), the lower end of the compression bar (281) is provided with a guide disc (284), the guide disc (284) is slidably connected in the straight cylinder (282), and a second elastic piece (283) is arranged between the lower end of the guide disc (284) and the bottom end of the inner wall of the straight cylinder (282);

the inner wall of the straight cylinder (282) is outwards sunken to form a clamping groove, a limiting piece is assembled on the clamping groove, the limiting piece is attached to the upper end of the guide disc (284), and the limiting piece is located on the outer side of the pressing rod (281).

5. A plastic bag closure apparatus according to claim 3, wherein: two fixing plates (24) are symmetrically arranged at the left end of the shell (2), the two fixing plates (24) are positioned at the front side and the rear side of the inlet, two rotating shafts (242) are symmetrically connected between the two fixing plates (24) in a rotating mode, and the two rotating shafts (242) are positioned at the upper side and the lower side of the inlet;

the outer end of the rotating shaft (242) is symmetrically provided with two spiral plates (241) which are oppositely arranged, the front end of the fixed plate (24) positioned at the front side is provided with a fixed part of third driving equipment, and the movable part of the third driving equipment is connected with one rotating shaft (242);

two functional gears (243) are arranged on the rear side of the rear-side fixed plate (24), the two functional gears (243) are meshed with each other, the functional gears (243) are arranged on the front side of the vertical plate (1), and the rear ends of the two rotating shafts (242) penetrate through the rear-side fixed plate (24) and are respectively connected with the two functional gears (243).

6. The plastic bag closure apparatus according to claim 5, wherein: the discharging part comprises a rotating shaft (16), the rotating shaft (16) is rotationally connected to the front end of the vertical plate (1), the rear end of the vertical plate (1) is rotationally connected with a damping gear (19), the upper end of the damping gear (19) is meshed with an auxiliary gear (18), and the rear end of the rotating shaft (16) penetrates through the vertical plate (1) and is connected with the auxiliary gear (18);

the baffle (17) is arranged at the rear side of the outer end of the rotating shaft (16), the front end of the vertical plate (1) is rotationally connected with the second guide roller (11), the second guide roller (11) is positioned on the right side of the baffle (17), and the second guide roller (11) is positioned on the left side of the fixed plate (24).

7. The plastic bag closure apparatus according to claim 6, wherein: the front end of the rotating shaft (16) is attached to the supporting plate (14), the front end surface of the supporting plate (14) is recessed backwards to form a U-shaped groove (15), the U-shaped groove (15) penetrates through the supporting plate (14), the U-shaped groove (15) extends to the upper end of the supporting plate (14), a cylinder (13) is arranged in the middle of the front end of the rotating shaft (16), and the cylinder (13) penetrates through the U-shaped groove (15);

the middle part of the lower end of the supporting plate (14) is provided with a movable part of lifting equipment, a fixed part of the lifting equipment is arranged on the upper end of the bottom plate (10), two guide pieces are symmetrically arranged between the supporting plate (14) and the bottom plate (10), and the two guide pieces are positioned on the left side and the right side of the lifting equipment;

the inner wall of the U-shaped groove (15) is provided with fixed parts of a plurality of rolling members at equal intervals, and movable parts of the rolling members are connected to the outer end of the lower part of the cylinder (13) in a rolling way.