CN111605776A

CN111605776A - Automatic bundling equipment is used in plastic bag production

Info

Publication number: CN111605776A
Application number: CN202010440109.2A
Authority: CN
Inventors: 李维光; 杨永志
Original assignee: Bengbu Weiguang Plastic Products Co ltd
Current assignee: Bengbu Weiguang Plastic Products Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-09-01

Abstract

The invention relates to the technical field of plastic bag packaging equipment, and particularly discloses automatic bundling equipment for plastic bag production, which comprises a rubber ring vibrating disc, a plastic bag discharging mechanism and a bundling device, wherein the bundling mechanism is arranged between the rubber ring vibrating disc and the plastic bag discharging mechanism, the bundling device comprises a case, a rotary disc and a stepping motor, a PLC is arranged on the outer side surface of the case, the stepping motor is arranged in the case, the upper end of an output shaft of the stepping motor is connected with a rotary rod through a coupler, the top end of the rotary rod penetrates through the top wall of the case to be connected with the circle center of the rotary disc, a plurality of connecting strips are uniformly connected on the circumferential surface of the rotary disc, and the outer ends of the connecting strips are connected; compared with the prior art, the plastic bag binding machine has the advantages that the rubber band slides down without manual assistance in the process of binding the folding plastic bag or the rolled plastic bag by the rubber band, the labor amount of operators is reduced, and the effect of reducing personnel and increasing efficiency is realized.

Description

Automatic bundling equipment is used in plastic bag production

Technical Field

The invention relates to the technical field of plastic bag packaging equipment, and particularly discloses automatic bundling equipment for plastic bag production.

Background

Plastic bags are bags made of plastic as a main raw material, are essential articles in daily life, are often used for containing other articles, and are widely used due to the advantages of low price, extremely light weight, large capacity and convenience in storage. The plastic bags on the market are sold after being bundled, and the folded or rolled plastic bags are mainly bundled by using rubber bands or rubber rings. The traditional plastic bag bundling is that the rubber band or the rubber ring is used manually for bundling, so that the labor intensity is high, the working efficiency is low, and the operating personnel can contact the plastic and the plastic products for a long time, so that the physical and mental health of the operating personnel is influenced to a certain extent.

The invention with the patent number of CN109733657A discloses a plastic bag bundling machine, which comprises a frame, a vibrating disc device and a plastic bag conveying device, wherein a U-shaped notch is arranged on the vibrating disc device, a rubber band opening device is further arranged at a position corresponding to the U-shaped notch, the rubber band opening device comprises a support, an upper side support rod, a bottom side support rod, two side support rods and an opening cylinder are further arranged on the support, and an insertion movement mechanism is further connected between the support and the frame. A plurality of support rods driven by the insertion movement mechanism are inserted into the inner hole of the rubber band from the U-shaped gap, then the rubber band is spread to one direction, narrowed, taken out from the U-shaped gap and then expanded; the invention discharges the rubber band through the vibrating disk device, then expands the rubber band through the four expanding cylinders, then stretches the folded or coiled plastic bag into the inner ring of the rubber band through the mechanical clamp, and finally extends the piston rods of the four expanding cylinders, thereby realizing the binding of the rubber band to the plastic bag. The invention has the advantages of slow binding rhythm and low efficiency in the actual use process, and has some problems, for example, when the piston rod of the expanding cylinder extends to bind the rubber band on the plastic bag, the rubber band is still on the four support rods, the rubber band can not slip off, the rubber band needs to be manually assisted to slip off from the four support rods, and the labor capacity of operators is invisibly increased. Therefore, in order to overcome the above disadvantages of the conventional plastic bag bundling machine, it is an object of the present invention to provide a plastic bag bundling apparatus which is highly efficient in bundling, can be automated in the whole process, and does not require an operator to perform an auxiliary operation.

Disclosure of Invention

The invention aims to overcome the defects that the conventional plastic bag binding machine is low in efficiency and an operator needs to assist to slip off a rubber band, and designs plastic bag binding equipment which is high in binding efficiency, can be automated in the whole process and does not need the auxiliary operation of the operator.

The invention is realized by the following technical scheme:

an automatic bundling device for plastic bag production comprises a rubber ring vibrating disc, a plastic bag discharging mechanism and a bundling device, wherein the bundling mechanism is arranged between the rubber ring vibrating disc and the plastic bag discharging mechanism, the bundling device comprises a case, a rotary disc and a stepping motor, the outer side surface of the case is provided with a PLC, the stepping motor is arranged inside the case, the upper end of an output shaft of the stepping motor is connected with a rotary rod through a coupler, the top end of the rotary rod penetrates through the top wall of the case to be connected with the circle center of the rotary disc, the circumferential surface of the rotary disc is uniformly connected with a plurality of connecting strips, the outer ends of the connecting strips are connected with a rubber band bundling mechanism, the rubber band bundling mechanism comprises a fixed plate, the fixed plate is connected with the connecting strips, the upper surface of the fixed plate is provided with a plurality of first rotating pieces in, the outer side surface of each semicircular column is provided with an arc-shaped bulge, the inner side surface of each semicircular column is provided with a second rotating piece, each second rotating piece is connected with a movable strip, a lifting block is arranged in the middle of each semicircular column, a third rotating piece connected with each movable strip is arranged on the outer side surface of each lifting block, a through hole is formed in the center of the fixed plate, a telescopic device is fixed on the lower surface of the fixed plate below the through hole, and the top end of each telescopic device is connected with the center of each lifting block;

a rubber band blanking pipeline is arranged at the discharge end of the rubber ring vibrating disc, is vertically arranged and is arranged right above one rubber band bundling mechanism;

the plastic bag blanking mechanism comprises a U-shaped frame plate, a support frame and a conveyor belt, wherein the support frame is connected with the lower end of the U-shaped frame plate, the conveyor belt is arranged on the U-shaped frame plate far away from one side of the binding device, a plastic bag blanking block is arranged in the U-shaped frame plate close to one side of the binding device, an inclined chute is arranged on the upper surface of the plastic bag blanking block, a plastic bag blanking port is arranged on the bottom wall of the inclined chute, the lower end of the plastic bag blanking port is connected with a material guide pipeline, the material guide pipeline is arranged right above the other rubber band binding mechanism, a rotating groove is arranged on the inclined chute, a through groove communicated with the rotating groove is arranged on the plastic bag blanking block far away from one side of the plastic bag blanking port, the lower end of the rotating groove is rotatably connected with a pushing plate, a fourth rotating piece is arranged on the inner side surface of, the end part of the pushing device extending into the through groove is connected with a push rod, and the inner end of the push rod is rotatably connected with the fourth rotating piece.

As a further arrangement of the above scheme, a finished product discharging mechanism is arranged beside the bundling device, the finished product discharging mechanism comprises a mechanical clamping jaw, a lifting hydraulic cylinder, a rotary column, a rotary drum and a servo motor, bearings are arranged at the upper end and the lower end of an inner cavity of the rotary drum, the rotary column is connected to the two bearings, driven gears are arranged on the rotary column between the two bearings, the servo motor is arranged outside the rotary drum, a driving gear is arranged on an output shaft of the servo motor, a notch is arranged on the side surface of the rotary drum between the driving gear and the driven gear, the driving gear is meshed with the driven gear through the notch, a mounting plate is arranged at the top end of the rotary column, the lifting hydraulic cylinder is fixed on the upper surface of the mounting plate, and the mechanical clamping jaw is arranged at the top.

As the further setting of above-mentioned scheme, mechanical clamping jaw includes roof, first holding strip, second holding strip and promotes the cylinder, first holding strip, second holding strip all rotate through the round pin axle and set up at the roof upper surface, and first holding strip and second holding strip symmetry set up, are located be connected with the spring between the left first holding strip of round pin axle, the second holding strip, it fixes on the roof on first holding strip and second holding strip right side to promote the cylinder, the piston rod end connection who promotes the cylinder has triangle-shaped kicking block, triangle-shaped kicking block can stretch into in the crack of first holding strip and second holding strip.

As a further arrangement of the above scheme, three connecting strips are arranged on the turntable, and the stepping motor rotates 120 degrees each time.

As a further arrangement of the above scheme, four first rotating members are provided on the upper surface of the fixing plate in an annular array.

As a further arrangement of the scheme, the upper end of the outer side surface of the semicircular column bar is provided with an inclined plane which is drawn inwards.

As a further arrangement of the scheme, the lower surface of the rubber ring vibration disc is provided with support legs, and the lower surfaces of the support legs are provided with rubber shock absorption pads.

As a further arrangement of the scheme, the telescopic device is an electric telescopic rod.

As a further arrangement of the above solution, the pushing device is one of a pneumatic cylinder and a hydraulic cylinder.

Has the advantages that:

1. the invention realizes uniform blanking of rubber band by the rubber ring vibrating disk, simultaneously, the rubber band bundling mechanism is accurately positioned under a rubber band blanking pipeline by controlling the rotating disk to rotate a certain angle each time by the stepping motor, when the rubber band falls into and is sleeved on the outer side surfaces of a plurality of semicircular column strips, the rubber band can slide down to the arc-shaped bulge part along the outer side surfaces, then the telescopic device extends to enable the lifting block to move upwards, the upper ends of the plurality of semicircular column strips are outwards opened under the action of the movable strip, the rubber band is stretched and expanded, the rubber band rotates to be under the material guide pipeline by the rotation of the stepping motor after the rubber band is stretched and expanded, a folded plastic bag or a plastic bag roll conveyed by the conveyor belt falls into the stretched and expanded rubber band inner ring from the material guide pipeline, at the moment, the telescopic device is quickly shortened, and the stretched and expanded rubber band can also quickly contract when the plurality of semicircular column strips clamp the plastic bag, the rubber band slides upwards along the outer side surface of the semicircular column bar under the action of restoring force of the rubber band until the rubber band slides down from the outer side surface of the semicircular column bar and is finally bound on the plastic bag; compared with the prior art, the plastic bag binding machine has the advantages that the rubber band slides down without manual assistance in the process of binding the folding plastic bag or the rolled plastic bag by the rubber band, the labor amount of operators is reduced, and the effect of reducing personnel and increasing efficiency is realized.

2. The plastic bag bundling machine has the advantages that the rubber bands arranged on the rubber ring vibration disc and the plastic bags arranged on the plastic bag discharging mechanism can be accurately butted with the corresponding rubber band bundling mechanisms through the high-precision fixed-angle rotation of the stepping motor in the whole bundling process, the whole bundling process sequentially comprises five steps of sleeving the rubber bands, opening the rubber bands, sleeving the plastic bands into the inner rings of the rubber bands, shrinking the rubber bands and automatically sliding upwards to realize plastic bag bundling, and the finished product discharging mechanism automatically takes down the bundled plastic bags, so that the whole bundling process realizes the streamlined operation, and the plastic bag bundling machine has high automation degree and higher bundling efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a first angular perspective view of the present invention;

FIG. 2 is a second perspective view of the present invention;

FIG. 3 is a plan view of the inside of the case according to the present invention;

FIG. 4 is a first state of the rubber band binding mechanism according to the present invention;

FIG. 5 is a perspective view of a second embodiment of the rubber band bundling mechanism according to the present invention;

FIG. 6 is a perspective view of the plastic bag feeding mechanism of the present invention;

FIG. 7 is a side interior plan view of a plastic bag downblock of the present invention;

fig. 8 is a schematic plan structure view of a finished product blanking mechanism in embodiment 2;

fig. 9 is a top plan view of the mechanical jaw of embodiment 2.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", and,

The terms "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like, refer to an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1 to 9, in conjunction with the embodiments.

Example 1

Embodiment 1 describes an automatic bundling device for plastic bag production, and referring to fig. 1 and fig. 2, the automatic bundling device mainly comprises a rubber ring vibrating disc 1, a plastic bag discharging mechanism 2 and a bundling device 3. Wherein the bundling mechanism 3 is arranged between the rubber ring vibrating disk 1 and the plastic bag blanking mechanism 2.

Referring to fig. 3, the strapping device includes a housing 301, a turntable 302, and a stepper motor 303. A PLC (not labeled in the figure) is arranged on the outer side surface of the case 301, wherein the PLC can be selected from model FX1N-24MT-001 of mitsubishi, and the stepping motor can be selected from model 60BYG350 DL-0451. Set up step motor 303 inside quick-witted case 1 during specific setting, and the thermovent (not drawn in the figure) has been seted up to the side at quick-witted case 1, there is bull stick 304 on its step motor 303 output shaft through the coupling joint, the top of bull stick 304 is passed quick-witted case 1 roof and is connected with the centre of a circle department of carousel 302, evenly be connected with a plurality of connecting strips 305 on the periphery of carousel 302, connecting strip 305 in this embodiment sets up to three, and be connected with rubber band bundling mechanism 306 in the outer end of every connecting strip 305, PLC realizes step motor 302 through pulse signal and rotates 120 at every turn when specifically setting up.

Referring to fig. 4 or fig. 5, the rubber band bundling mechanism 306 includes a fixed plate 3061, the fixed plate 3061 is connected to the connecting bar 305, a plurality of first rotating members 3062 are disposed in an annular array on the upper surface of the fixed plate 3061, and four first rotating members 3062 are disposed in this embodiment. Each first rotating member 3062 is rotatably connected with a semi-cylindrical bar 3063, the outer side surface of the semi-cylindrical bar 3063 is a smooth arc-shaped surface, meanwhile, an inward approaching inclined surface 3064 is arranged at the upper end of the outer side surface of the semi-cylindrical bar 3063, and the arrangement of the inward approaching inclined surface 3064 can facilitate slipping of the rubber band. The arc-shaped protrusions 3065 are arranged on the outer side faces of the semicircular column bars 3063, the arc-shaped protrusions 3065 play a limiting role, and the rubber band can be effectively prevented from sliding to the bottom end when being sleeved on the four semicircular column bars 3063. The inner side surface of the semi-cylindrical bar 3063 is provided with a second rotating piece 3066, the second rotating piece 3066 is rotatably connected with a movable bar 3067, a lifting block 3068 is arranged between the four semi-cylindrical bars 3063, a third rotating piece 3069 rotatably connected with each movable bar 3067 is arranged on the outer side surface of the lifting block 3068, then a through hole is arranged at the center of the fixed plate 3061, a telescopic device 3060 is fixed on the lower surface of the fixed plate 3061 below the through hole, the telescopic device 3060 in the embodiment is an electric telescopic rod, and the top end of the electric telescopic rod penetrates through the through hole to be connected with the center of the lifting block 3068. In a specific using process, the electric telescopic rod is contracted to the shortest, so that the top ends of the four semi-cylindrical bars 3063 are close to each other (referring to the attached figure 4), and at the moment, the rubber band is conveniently sleeved in the four semi-cylindrical bars 3063; when the electric telescopic rod extends to the longest, the top ends of the four semicircular column bars 3063 are opened outwards at the same time (referring to the attached drawing 5), the rubber band sleeved at the moment can be stretched and expanded, then the electric telescopic rod is shortened quickly, the stretched rubber band can be shrunk quickly due to restoring force and slides upwards, and finally the electric telescopic rod slips from the four semicircular column bars 3063.

Referring to fig. 1 or fig. 2, the rubber ring vibration plate 1 in this embodiment is an existing device, and will not be specifically described here, a rubber band blanking pipeline 101 is disposed at a discharge end of the rubber ring vibration plate 1, the rubber band blanking pipeline 101 is vertically disposed, and the rubber band blanking pipeline 101 is disposed right above one of the rubber band bundling mechanisms 306 on the turntable 302; when falling down from the rubber band blanking pipeline 101, the rubber band can be sleeved on the four semi-cylindrical bars 3063 with the top ends close, so that the automatic feeding of the rubber band is realized. In addition, in order to reduce the vibration noise of the rubber ring vibration disk 1, the lower surface of the rubber ring vibration disk 1 is provided with support legs, and the lower surfaces of the support legs are provided with rubber shock absorbing pads 102.

Referring to fig. 1 and 2, the plastic bag discharging mechanism 2 includes a U-shaped frame plate 201, a support 202 and a conveyor belt 203, wherein the support 202 is connected to the lower end of the U-shaped frame plate 201, and the conveyor belt 203 is disposed on the U-shaped frame plate 201 at a side far away from the binding device 3. Referring to fig. 6 and 7, a plastic bag discharging block 204 is disposed in the U-shaped frame plate on the side close to the bundling apparatus 3, an inclined chute 2041 is disposed on the upper surface of the plastic bag discharging block 204, a plastic bag discharging opening 2042 is disposed on the bottom wall of the inclined chute 2041, a material guiding pipe 205 is connected to the lower end of the plastic bag discharging opening 2042, and the material guiding pipe 205 is disposed right above another rubber band bundling mechanism 306. Meanwhile, a rotating groove 2043 is formed in the inclined chute 2041, a through groove 2044 communicated with the rotating groove 2043 is formed in a plastic bag discharging block 204 on one side far away from the plastic bag discharging opening 2042, a pushing plate 2045 is rotatably connected to the lower end of the rotating groove 2043, the pushing plate 2045 is arranged in parallel with the inclined chute 2041, a fourth rotating member 2046 is arranged on the inner side surface of the pushing plate 2045, a pushing device 206 is arranged on a U-shaped frame plate 201 located at the outer end of the through groove 2044, the pushing device 206 can be an air cylinder or a hydraulic cylinder, the end of the pushing device 206 extending into the through groove 2044 is connected with a push rod 2047, and the inner end of the push rod 2047 is rotatably connected with the fourth rotating member 2046. The plastic bag discharging mechanism 2 transports the folded plastic bag 100 to the inclined chute 2041 on the plastic bag discharging block 204 through the conveyor belt 203, and then the pushing device 206 pushes the material pushing plate 2045 to rotate, so that the folded plastic bag 100 can be pushed into the plastic bag discharging opening 2042 and then vertically falls into the rubber band bundling mechanism 306 along the material guiding pipeline 205.

Example 2

Embodiment 2 is to add a blanking mechanism for finished products after bundling on the basis of embodiment 1, and specifically refer to fig. 8 and 9.

The embodiment 2 is the same as the embodiment 1, and will not be repeated, except that, referring to fig. 8, a finished product blanking mechanism 4 is further disposed beside the strapping device 3, and when the finished product blanking mechanism 4 is specifically disposed, the finished product blanking mechanism 4 can be disposed at a downstream position of the plastic bag blanking mechanism 2. Wherein the finished product blanking mechanism 4 comprises a mechanical clamping jaw 401, a lifting hydraulic cylinder 402, a rotary column 403, a rotary drum 404 and a servo motor 405, the servo motor 405 can be selected from servo motors with model number of 110MB060D-001000, the upper and lower ends of the inner cavity of the rotating drum 404 are provided with bearings 4041, the rotary column 403 is connected with the inner ring of two bearings 4041, a driven gear 4031 is arranged on the rotary column 403 between the two bearings 4041, a servo motor 405 is fixedly arranged on the outer side of the rotary drum 404, then, a driving gear 4051 is provided on the output shaft of the servo motor 405, a notch is opened on the side surface of the drum 404 between the driving gear 4051 and the driven gear 4031, the driving gear 4051 is engaged with the driven gear 4031 through a notch, a mounting plate 406 is arranged at the top end of the rotary column 403, its lifting cylinder 402 is fixed to the upper surface of the mounting plate 406 and its mechanical jaws 401 are arranged on top of the lifting cylinder 402. In the blanking process, the mechanical clamping jaw 401 is lifted to a horizontal position slightly higher than the rubber band bundling mechanism 306 by the lifting hydraulic cylinder 402, then the PLC controls the servo motor 405 to rotate for a certain angle, so that the mechanical clamping jaw 401 can be used for binding the plastic bag, the lifting hydraulic cylinder 402 is continuously lifted after the mechanical clamping jaw 401 is clamped, the plastic bag in the rubber band bundling mechanism is taken down by the mechanical clamping jaw 401, then the PLC controls the servo motor 405 to reversely rotate to a proper position, the mechanical clamping jaw 401 is loosened, and the plastic bag is placed into a collection box to be packaged.

Referring to fig. 9, the mechanical gripper 401 in this embodiment includes a top plate 4011, a first holding strip 4012, a second holding strip 4013, and a pushing cylinder 4014, wherein the first holding strip 4012 and the second holding strip 4013 are both rotatably disposed on the upper surface of the top plate 4011 through a pin (not labeled in the figure), the first holding strip 4012 and the second holding strip 4013 are symmetrically disposed, a spring 4015 is connected between the first holding strip 4012 and the second holding strip 4013 on the left side of the pin, the pushing cylinder 4014 is fixed on the top plate 4011 on the right side of the first holding strip 4012 and the second holding strip 4013, a triangular ejector block 4016 is connected to the end of a piston rod of the pushing cylinder 4014, and the triangular ejector block 4016 can extend into a gap between the first holding strip 4012 and the second holding strip 4013, so that the first holding strip 4012 and the second holding strip 4013 hold a bundled plastic bag.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic bundling device for plastic bag production comprises a rubber ring vibrating disc, a plastic bag discharging mechanism and a bundling device, wherein the bundling mechanism is arranged between the rubber ring vibrating disc and the plastic bag discharging mechanism, and is characterized in that the bundling device comprises a case, a rotary disc and a stepping motor, the outer side surface of the case is provided with a PLC, the stepping motor is arranged inside the case, the upper end of an output shaft of the stepping motor is connected with a rotary rod through a coupler, the top end of the rotary rod penetrates through the top wall of the case to be connected with the circle center of the rotary disc, the circumferential surface of the rotary disc is uniformly connected with a plurality of connecting strips, the outer ends of the connecting strips are connected with a rubber band bundling mechanism, the rubber band bundling mechanism comprises a fixed plate, the fixed plate is connected with the connecting strips, the upper surface of the fixed plate is provided with a plurality of first rotating pieces, the outer side surface of each semicircular column is provided with an arc-shaped bulge, the inner side surface of each semicircular column is provided with a second rotating piece, each second rotating piece is connected with a movable strip, a lifting block is arranged in the middle of each semicircular column, a third rotating piece connected with each movable strip is arranged on the outer side surface of each lifting block, a through hole is formed in the center of the fixed plate, a telescopic device is fixed on the lower surface of the fixed plate below the through hole, and the top end of each telescopic device is connected with the center of each lifting block;

2. The automatic bundling apparatus for producing plastic bags according to claim 1, wherein a product blanking mechanism is provided beside said bundling apparatus, the finished product blanking mechanism comprises a mechanical clamping jaw, a lifting hydraulic cylinder, a rotary column, a rotary drum and a servo motor, the upper end and the lower end of the inner cavity of the rotary drum are provided with bearings, the rotary column is connected with the two bearings, a driven gear is arranged on the rotary column between the two bearings, the servo motor is arranged on the outer side of the rotary drum, the output shaft of the servo motor is provided with a driving gear, the side surface of the rotary drum between the driving gear and the driven gear is provided with a notch, the driving gear is meshed with the driven gear through the gap, the top end of the rotating column is provided with an installation plate, the lifting hydraulic cylinder is fixed on the upper surface of the mounting plate, and the mechanical clamping jaw is arranged at the top end of the lifting hydraulic cylinder.

3. The automatic bundling device for plastic bag production according to claim 2, wherein the mechanical clamping jaw comprises a top plate, a first clamping strip, a second clamping strip and a pushing cylinder, the first clamping strip and the second clamping strip are rotatably arranged on the upper surface of the top plate through a pin shaft, the first clamping strip and the second clamping strip are symmetrically arranged, a spring is connected between the first clamping strip and the second clamping strip on the left side of the pin shaft, the pushing cylinder is fixed on the top plate on the right side of the first clamping strip and the second clamping strip, a triangular top block is connected to the end portion of a piston rod of the pushing cylinder, and the triangular top block can extend into a gap between the first clamping strip and the second clamping strip.

4. The automatic strapping apparatus for the production of plastic bags according to claim 1, wherein the number of the coupling bars provided on the turntable is three, and the stepping motor is provided for every 120 ° rotation.

5. The automatic bundling apparatus for manufacturing plastic bags according to claim 1, wherein the number of the first rotating members provided on the upper surface of the fixing plate in a circular array is four.

6. The automatic bundling apparatus for producing plastic bags according to claim 5, wherein the upper end of the outer side of the semicircular column is provided with an inward-approaching slope.

7. The automatic strapping device for plastic bag production according to claim 1, wherein the lower surface of the rubber ring vibrating tray is provided with support legs, and the lower surfaces of the support legs are provided with rubber shock-absorbing pads.

8. The automatic strapping apparatus for plastic bag production according to claim 1, wherein the telescoping device is an electric telescopic rod.

9. The automatic strapping apparatus for plastic bag production according to claim 1, wherein the pushing means is one of a pneumatic cylinder or a hydraulic cylinder.