CN112623394A

CN112623394A - Economize material packagine machine according to automatic adaptation of express delivery box size

Info

Publication number: CN112623394A
Application number: CN202110113093.9A
Authority: CN
Inventors: 刘先
Original assignee: Shenzhen Yuyang Trading Co ltd
Current assignee: Shenzhen Yuyang Trading Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-04-09

Abstract

The invention discloses a material-saving packaging machine automatically adapting to the size of an express box, which comprises a plastic packaging box and feeding mechanisms symmetrically arranged on the upper side and the lower side of the plastic packaging box, wherein a plastic packaging cavity penetrating left and right is arranged in the plastic packaging box, and a blocking mechanism, a plastic packaging cutting mechanism, a detection moving mechanism, a pressing mechanism and a marking mechanism are arranged in the plastic packaging cavity; the invention uses the structure which automatically adapts to the length of the express delivery piece, when the express delivery piece comes to a processing area, the position of the cutter is adjusted in a mode that the cutter adapting to the length moves without touching the express delivery piece, so that the consumption waste of the express delivery packaging bag is greatly reduced, a large amount of cost is reduced, meanwhile, the plastic packaging integrated structure is cut, the bag material can be subjected to plastic packaging at the first time of cutting off the bag material, the sealing performance of the packaging bag is improved, and then the overall sealing performance is effectively improved through subsequent side sealing.

Description

Economize material packagine machine according to automatic adaptation of express delivery box size

Technical Field

The invention relates to a material-saving packaging machine automatically adaptive to the size of an express box, and belongs to the technical field of packaging of main products.

Background

The product package refers to a general term for decoration attached to a product by using containers, materials, auxiliary materials and the like according to a certain technical method in order to protect the product and facilitate storage and sales in the circulation process of product transportation, storage, sales and the like. The product package is not only beneficial to ensuring the safety and the product quality of special products, but also can well protect the legal rights and interests of the warehousers, transporters, sellers and consumers of the products;

the packaging bag on the outer side is generally used for thermoplastic sealing on the packaging of the express box, the sealing plastic bag on the outer side can play a role in sealing, preventing water, protecting privacy and the like, but in actual packaging production, more problems exist, the most important is the cost problem, under the condition that the sizes of the express pieces are different, the existing packaging machine cannot be practically adapted generally, so that the sealing bag with the actually suitable size is cut, when the sizes of the sealing bag and the express pieces are different, the problems of waste cost increase, sliding of the express pieces, damage and the like are easily caused in the transportation process, and the traditional packaging machine for carrying out the processing is time-consuming and labor-consuming, low in efficiency and low in automation degree.

Disclosure of Invention

The invention aims to solve the technical problem of providing a material-saving packaging machine which is automatically adaptive to the size of an express box, and overcomes the problems.

The invention is realized by the following technical scheme.

The invention relates to a material-saving packaging machine capable of automatically adapting to the size of an express box, which comprises a plastic packaging box and feeding mechanisms symmetrically arranged on the upper side and the lower side of the plastic packaging box, wherein a plastic packaging cavity penetrating left and right is arranged in the plastic packaging box, and a blocking mechanism, a plastic packaging cutting mechanism, a detection moving mechanism, a pressing mechanism and a marking mechanism are arranged in the plastic packaging cavity;

the detection moving mechanism comprises a processing seat positioned on the bottom wall of the plastic package cavity, a feeding conveyor belt extending to the right side of the plastic package cavity is arranged on the black on the right side of the processing seat, a quick-delivery piece reaches the processing seat through the feeding conveyor belt to be processed, a discharging conveyor belt extending to the left side of the plastic package box is arranged on the left side of the processing seat, when the quick-delivery piece on the processing seat is processed, the quick-delivery piece is conveyed out through the discharging conveyor belt, a button cavity is arranged in the processing seat, a pressure button with the upper end extending to the upper side of the processing seat is arranged in the button cavity in a sliding manner, a button rod is arranged on the lower side of the pressure button, the lower side of the button rod is elastically connected with the bottom wall of the button cavity through a spring, a trigger is arranged on the bottom wall of the button cavity, a motor is arranged above, the lower end of the connecting wire is connected with the trigger, when the pressure button is pressed, the motor can be started through the trigger and the connecting wire, the left side of the motor is connected with a spindle, a driving belt pulley is arranged on the spindle, a driven belt pulley on the lower side is connected to the driving belt pulley through a belt, a sliding seat is arranged on the lower side of the motor, a threaded block is arranged on the lower side of the sliding seat in a sliding mode, a lead screw is connected to the left side of the driven belt pulley, the threaded block is in threaded connection with the lead screw, a transverse moving rod is arranged on the lower side of the threaded block, the position of the transverse moving rod on the processing seat can be controlled through positive and negative rotation of the spindle, and then the cutting position is;

the cutting plastic package mechanism comprises a cutting box connected to the lower end of the transverse moving rod, a cutting cavity is arranged in the cutting box, a cutting sliding core is arranged on the inner wall of the cutting cavity in a sliding mode, the upper side of the cutting sliding core is elastically connected with the upper wall of the cutting cavity through a spring, bilaterally symmetrical extension rods are arranged on the lower side of the cutting sliding core, the lower end of each extension rod extends to the lower side of the cutting cavity and is connected with a thermoplastic strip, a cutting knife is connected to the lower side of the cutting box, when the transverse moving rod presses the cutting box downwards, the thermoplastic strip contacts with a plastic package bag in advance, meanwhile, interfaces on two sides of the plastic package are released, when the transverse moving rod continues downwards, the cutting knife cuts off the connection of the left plastic package bag and the right plastic package bag, the plastic package bag can adapt to a quick-delivery piece by matching with the detection moving mechanism, and two cutting, after the left and right sides of plastic envelope bag is by the plastic envelope, process discharging conveyor's operation, the opening has arrived around the plastic envelope bag thermoplastic runner with among discharging conveyor's the centre gripping, through the extrusion heating of thermoplastic runner for the plastic envelope bag is accomplished and is sealed, makes the plastic envelope bag separation of front and back through cutting off of cutting off piece simultaneously, forms two independent express delivery pieces.

Furthermore, feed mechanism is including being located two film rolls of plastic envelope case bilateral symmetry about, the film is rolled up and is had the plastic film who is used for making the plastic envelope bag, be equipped with two the same membrane mouths of advancing on two walls of plastic envelope case, the film that the film was rolled up passes through finally reach behind the membrane mouth the upside of handling the seat, express delivery piece gets into between the upper and lower plastic film, the rethread thermoplasticity runner reaches the thermoplasticity of thermoplasticity strip seals, forms independent plastic envelope bag.

Further, the pressing mechanism comprises an air pump positioned on the upper side of the plastic package box, an air pipe extending into the plastic package cavity is arranged on the lower side of the air pump, a rotary seat is arranged on the top wall of the plastic package cavity, a push plate is rotatably connected to the lower side of the rotary seat, an elastic box is arranged on the left side of the air pipe, an elastic sliding core is slidably arranged in the elastic box, the right side of the elastic sliding core is elastically connected with the right wall of the elastic cavity through a spring, a sealing plate extending into the plastic package cavity is arranged on the left side of the elastic sliding core, the left end of the sealing plate is abutted against the right side of the push plate, the right end of the sealing plate extends into the air pipe, the right end of the sealing plate is sealed at the initial state, the air pipe is connected with a pneumatic box, a pneumatic cavity is arranged in the pneumatic box, a pneumatic sliding core is arranged in the pneumatic cavity, and, the utility model discloses a plastic packaging machine, including rebound case, rebound intracavity, rebound chamber, control block, push pedal, trachea, detection moving mechanism, the rebound intracavity is equipped with the rebound chamber, the slip of rebound intracavity is equipped with the smooth core of resilience, the smooth core downside of resilience is equipped with and extends to the gangbar of plastic packaging intracavity, the gangbar lower extreme is connected the motor, be equipped with the trigger block on the chamber right wall of resilience, the trigger block right side be equipped with the control line that the trachea is connected, reach as the express delivery piece the front end promotes when handling on the seat the push pedal is left, makes the trachea intercommunication pneumatic chamber, this moment detection.

Further, stop mechanism including connect in the pull line on push pedal lower extreme right side, be equipped with on the plastic envelope chamber bottom wall and block the frame, block that the frame upper end extends to the top swivelling joint of feeding conveyer belt rotates the wheel, it is equipped with the spring book to rotate the wheel center, rotate the wheel downside be equipped with the left side with the pull rod that the pull line is connected, it is connected with on the wheel right side and blocks the pole to rotate, when express delivery piece left end promotes during the push pedal, it becomes vertical form to block the pole and rotate to the downside for subsequent express delivery piece can not pass through, and then when preventing to cut off the plastic envelope, causes trouble and damage, is in simultaneously the express delivery piece of push pedal downside passes through after walking completely the elasticity of spring book will the initial position is pulled back to the push pedal.

Further, the marking mechanism comprises two limiting rods which are vertically symmetrical on the left side of the motor, the left end of the main shaft is connected with a connecting disc, two connecting rods are symmetrically arranged on the upper side and the lower side of the connecting disc, short mark blocks are arranged at the lower ends of the lower side connecting rods, long mark blocks are arranged at the upper ends of the upper side connecting rods, a stop rod is arranged on the right side of the stop rod and extends to the rear side of the lower side connecting rod, so that the connecting disc cannot rotate backwards, when an express delivery piece triggers the pressure button but does not touch the push plate, the connecting disc does not rotate, when the express delivery piece is longer, the pressure button is kept triggered, the push plate is pushed open, so that the connecting disc rotates, the long mark blocks rotate to the lower side, the limiting rods are used for limiting the long mark blocks, the long mark blocks can mark the long mark, and otherwise when the express delivery piece triggers the push plate, the pressure button has flicked, then the connecting disc does not rotate, and the short mark block can mark short marks on express mails.

The invention has the beneficial effects that: the invention uses the structure which automatically adapts to the length of the express delivery piece, when the express delivery piece comes to a processing area, the position of the cutter is adjusted in a mode that the cutter adapting to the length moves without touching the express delivery piece, so that the consumption waste of the express delivery packaging bag is greatly reduced, a large amount of cost is reduced, meanwhile, the plastic packaging integrated structure is cut, the bag material can be subjected to plastic packaging at the first time of cutting off the bag material, the sealing performance of the packaging bag is improved, and then the overall sealing performance is effectively improved through subsequent side sealing.

Drawings

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

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the structure a-a in fig. 1.

FIG. 3 is a schematic diagram of B-B in FIG. 1.

Fig. 4 is an enlarged schematic view of C in fig. 1.

Fig. 5 is an enlarged schematic view of D in fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The material-saving packaging machine capable of automatically adapting to the size of an express box, which is described in conjunction with the attached drawings 1-5, comprises a plastic packaging box 10 and feeding mechanisms 100 which are symmetrically arranged on the upper side and the lower side of the plastic packaging box 10, wherein a plastic packaging cavity 11 which penetrates through the plastic packaging box 10 from left to right is arranged in the plastic packaging box 10, and a blocking mechanism 101, a plastic packaging cutting mechanism 102, a detection moving mechanism 103, a pressing mechanism 104 and a marking mechanism 105 are arranged in the plastic packaging cavity 11;

detect moving mechanism 103 including being located processing seat 21 on the 11 diapalls of plastic envelope chamber, it has the black of processing seat 21 right side to extend to the feeding conveyer belt 14 on plastic envelope chamber 11 right side, and the express delivery piece passes through feeding conveyer belt 14 reachs handle on the seat 21, it is equipped with to extend to handle 21 left side exit conveyor 22 of plastic envelope case 10, when the express delivery piece on handling seat 21 is handled and is accomplished, will pass through exit conveyor 22 conveys, be equipped with button cavity 48 in the processing seat 21, slide in the button cavity 48 and be equipped with the upper end and extend to handle the pressure button 47 of 21 upside and do not the pressure button 47 downside is equipped with button rod 49, button rod 49 downside passes through spring elastic connection the diapire of button cavity 48, be equipped with trigger 50 on the button cavity 48 diapire, the top of handling seat 21 is equipped with motor 45, a connecting line 46 with one end extending into the button cavity 48 is arranged at the rear side of the motor 45, the lower end of the connecting line 46 is connected with the trigger 50, when the pressure button 47 is pressed, the motor 45 can be started through the trigger 50 and the connecting line 46, the left side of the motor 45 is connected with a main shaft 63, a driving belt pulley 64 is arranged on the main shaft 63, a driven belt pulley 66 at the lower side is connected to the driving belt pulley 64 through a belt 65, a sliding seat 69 is arranged at the lower side of the motor 45, a thread block 68 is arranged at the lower side of the sliding seat 69 in a sliding manner, a screw rod 67 is connected to the left side of the driven belt pulley 66, the thread block 68 is in threaded connection with the screw rod 67, a transverse moving rod 51 is arranged at the lower side of the thread block 68, the position of the transverse moving rod 51 on the processing seat 21, the purpose of adapting the plastic package bag to the express delivery piece is achieved;

the cutting plastic package mechanism 102 comprises a cutting box 52 connected to the lower end of the traverse rod 51, a cutting cavity 53 is arranged in the cutting box 52, a cutting slide core 54 is arranged on the inner wall of the cutting cavity 53 in a sliding manner, the upper side of the cutting slide core 54 is elastically connected with the upper wall of the cutting cavity 53 through a spring, bilaterally symmetrical extension rods 55 are arranged on the lower side of the cutting slide core 54, the lower end of the extension rod 55 extends to the lower side of the cutting cavity 53 and is connected with a thermoplastic strip 57, the lower side of the cutting box 52 is connected with a cutting knife 56, when the traverse rod 51 presses the cutting box 52 downwards, the thermoplastic strip 57 contacts with a plastic package in advance, simultaneously, interfaces on two sides of the plastic package are released, when the traverse rod 51 continues to go downwards, the cutting knife 56 cuts off the connection of the left and right plastic package, at the moment, the plastic package can adapt to a express item by matching with the detection moving mechanism 103, two cutting sheets 42 and a thermoplastic rotating wheel 43 are symmetrically, after the left and right sides of plastic envelope bag is by the plastic envelope, process discharge conveyor 22's operation, the front and back opening of plastic envelope bag has arrived thermoplastic runner 43 with among discharge conveyor 22's the centre gripping, through the extrusion heating of thermoplastic runner 43 for the plastic envelope bag is accomplished and is sealed, makes the plastic envelope bag separation of front and back through cutting off of cutting blade 42 simultaneously, forms two independent express delivery pieces.

Beneficially, the feeding mechanism 100 includes two film rolls 12 located at the upper and lower sides of the plastic-sealed box 10 symmetrically, the film rolls 12 are wound with plastic films for manufacturing plastic-sealed bags, two identical film inlets 13 are disposed on the upper and lower walls of the plastic-sealed box 10, the films on the film rolls 12 finally reach the upper side of the processing seat 21 after passing through the film inlets 13, and a quick-delivery piece enters between the upper and lower plastic films, and then passes through the thermoplastic rotating wheel 43 and the thermoplastic sealing of the thermoplastic strip 57 to form an independent plastic-sealed bag.

Beneficially, push down mechanism 104 includes the air pump 32 that is located plastic packaging box 10 upside, air pump 32 downside is equipped with and extends to trachea 33 in the plastic packaging chamber 11, be equipped with roating seat 30 on the plastic packaging chamber 11 roof, roating seat 30 downside swivelling joint has push pedal 23, trachea 33 left side is equipped with spring box 35, it is equipped with the smooth core 37 of elasticity to slide in the spring box 35, the smooth core 37 right side of elasticity is through spring elastic connection the right wall in elasticity chamber 36, elasticity smooth core 37 left side is equipped with and extends to obturation plate 31 in the plastic packaging chamber 11, obturation plate 31 left end butt the right side of push pedal 23, obturation plate 31 right end extends to in the trachea 33, during initial state obturation plate 31 right end is sealed trachea 33, the trachea 33 lower extreme is connected with pneumatic box 38, be equipped with pneumatic cavity 39 in pneumatic box 38, the pneumatic die is characterized in that a pneumatic sliding core 40 is arranged in the pneumatic cavity 39 in a sliding mode, the lower end of the pneumatic sliding core 40 extends to a rebound box 58 connected to the plastic package cavity 11, a rebound cavity 59 is arranged in the rebound box 58, a rebound sliding core 61 is arranged in the rebound cavity 59 in a sliding mode, the lower side of the rebound sliding core 61 is provided with a linkage rod 44 extending to the plastic package cavity 11, the lower end of the linkage rod 44 is connected to a motor 45, a trigger block 60 is arranged on the right wall of the rebound cavity 59, the right side of the trigger block 60 is provided with a control line 34 connected with the air pipe 33, and when a quick-delivery piece arrives at the processing seat 21, the front end of the push plate 23 pushes leftwards, so that the air pipe 33 is communicated with the pneumatic cavity 39, at the moment, the detection moving mechanism 103 and the cutting plastic package mechanism 102 integrally start plastic.

Beneficially, stop mechanism 101 including connect in push pedal 23 lower extreme right side's tension line 24, be equipped with on the 11 diapalls of plastic envelope chamber and block frame 16, block that frame 16 upper end extends to feed conveyor 14's top swivelling joint has and rotates wheel 19, it is equipped with spring roll 18 to rotate wheel 19 center, it is equipped with the left side and the tension bar 17 that tension line 24 connects to rotate wheel 19 downside, it is connected with on 19 right sides and blocks pole 20 to rotate wheel 19, when express delivery piece left end promotes push pedal 23, it is perpendicular form to block pole 20 and rotate to the downside for subsequent express delivery piece can not pass through, and then when preventing to cut off the plastic envelope, causes trouble and damage, simultaneously in the express delivery piece of push pedal 23 downside is gone completely the back through spring roll 18's elasticity will push pedal 23 pulls back initial position.

Beneficially, the marking mechanism 105 includes two limiting rods 62 vertically symmetrical to each other on the left side of the motor 45, the left end of the main shaft 63 is connected with a connecting disc 28, two connecting rods 27 are symmetrically arranged on the upper and lower sides of the connecting disc 28, a short marker 25 is arranged at the lower end of the connecting rod 27 on the lower side, a long marker 29 is arranged at the upper end of the connecting rod 27 on the upper side, a stop rod 26 is arranged on the right side of the stop rod 26 and extends to the lower side of the rear side of the connecting rod 27, so that the connecting disc 28 cannot rotate backwards, when an express item triggers the pressure button 47 but does not touch the push plate 23, when the express item is longer, pushing the push plate 23 while keeping triggering the pressure button 47 will make the connecting disc 28 rotate, so that the long marker 29 rotates to the lower side, the limiting rods 62 are used for limiting the long marker 29, at this time, the long marker 29 will mark the long marker, and on the contrary, when the express mail triggers the push plate 23, the pressure button 47 is bounced off, the connecting disc 28 does not rotate, and the short mark block 25 can mark the express mail with a short mark.

Sequence of mechanical actions of the whole device:

1. in the initial state, the thread block 68 is positioned at the left side, the short mark block 25 is positioned at the lower side, and the stop lever 26 is positioned at the rear side of the lower connecting rod 27;

2. the feeding conveyor belt 14 is started to convey the express mail to the upper side of the processing seat 21, and when the express mail is long, the express mail pushes the push plate 23 out to the left after contacting the pressure button 47;

3. at the moment, the air tube 33 is ejected leftwards by the airtight plate 31 to be communicated up and down under the action of the spring on the right side of the elastic sliding core 37, and the air pump 32 is started to enable the motor 45 to start to descend through the air tube 33, the pneumatic cavity 39, the pneumatic sliding core 40, the pneumatic push rod 41, the rebound box 58, the rebound sliding core 61 and the linkage rod 44;

4. at the moment, the pressure button 47 starts the motor 45 through the button rod 49, the trigger 50 and the connecting wire 46, meanwhile, the motor 45 rotates the connecting disc 28 and the connecting rod 27 through the main shaft 63, under the condition that the stop lever 26 is popped up leftwards, the long mark block 29 rotates to the lower side, and stays at the vertical position through the limiting rod 62 on the lower side;

5. meanwhile, the main shaft 63 adjusts the transverse moving rod 51 to the right side through the driving belt pulley 64, the belt 65, the driven belt pulley 66, the screw rod 67, the sliding seat 69 and the thread block 68, so that the purpose of adapting to the size of the express mail is achieved;

6. at the moment, the transverse moving rod 51 descends to pass through the cutting box 52, the cutting slide core 54, the extension rod 55 and the thermoplastic strip 57 for plastic packaging on two sides, and then the transverse moving rod 51 descends continuously to enable the cutting knife 56 to cut off plastic packaging bags on two sides;

7. meanwhile, the push plate 23 blocks express items on the subsequent feeding conveyor belt 14 from continuously entering the upper side of the processing seat 21 through the tension line 24, the rotating wheel 19, the spring roll 18 and the blocking rod 20, meanwhile, the left side and the right side of the thermoplastic rotating wheel 43 are pulled to finish plastic-sealed sealing bags, the upper side of the discharging conveyor belt 22 forms an independent individual discharging device after plastic sealing of the thermoplastic rotating wheel 43 and cutting of the cutting piece 42 to finish packaging, and then the device integrally resets under the elasticity of the spring roll 18;

8. when the express mail is short, the pressure button 47 rebounds when the push plate 23 is triggered, the motor 45 stops rotating, and the short mark block 25 and the transverse moving rod 51 which keeps the initial position synchronously downwards complete marking and plastic package cutting tasks.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a economize material packagine machine according to express delivery box size automatic adaptation which characterized in that: the plastic packaging box comprises a plastic packaging box and feeding mechanisms symmetrically arranged on the upper side and the lower side of the plastic packaging box, wherein a plastic packaging cavity penetrating left and right is arranged in the plastic packaging box, and a blocking mechanism, a plastic packaging cutting mechanism, a detection moving mechanism, a pressing mechanism and a marking mechanism are arranged in the plastic packaging cavity; the detection moving mechanism comprises a processing seat positioned on the bottom wall of the plastic package cavity, a feeding conveyor belt extending to the right side of the plastic package cavity is arranged on the black on the right side of the processing seat, a quick-delivery piece reaches the processing seat through the feeding conveyor belt to be processed, a discharging conveyor belt extending to the left side of the plastic package box is arranged on the left side of the processing seat, when the quick-delivery piece on the processing seat is processed, the quick-delivery piece is conveyed out through the discharging conveyor belt, a button cavity is arranged in the processing seat, a pressure button with the upper end extending to the upper side of the processing seat is arranged in the button cavity in a sliding manner, a button rod is arranged on the lower side of the pressure button, the lower side of the button rod is elastically connected with the bottom wall of the button cavity through a spring, a trigger is arranged on the bottom wall of the button cavity, a motor is arranged above, the lower end of the connecting wire is connected with the trigger, when the pressure button is pressed, the motor can be started through the trigger and the connecting wire, the left side of the motor is connected with a spindle, a driving belt pulley is arranged on the spindle, a driven belt pulley on the lower side is connected to the driving belt pulley through a belt, a sliding seat is arranged on the lower side of the motor, a threaded block is arranged on the lower side of the sliding seat in a sliding mode, a lead screw is connected to the left side of the driven belt pulley, the threaded block is in threaded connection with the lead screw, a transverse moving rod is arranged on the lower side of the threaded block, the position of the transverse moving rod on the processing seat can be controlled through positive and negative rotation of the spindle, and then the cutting position is; the cutting plastic package mechanism comprises a cutting box connected to the lower end of the transverse moving rod, a cutting cavity is arranged in the cutting box, a cutting sliding core is arranged on the inner wall of the cutting cavity in a sliding mode, the upper side of the cutting sliding core is elastically connected with the upper wall of the cutting cavity through a spring, bilaterally symmetrical extension rods are arranged on the lower side of the cutting sliding core, the lower end of each extension rod extends to the lower side of the cutting cavity and is connected with a thermoplastic strip, a cutting knife is connected to the lower side of the cutting box, when the transverse moving rod presses the cutting box downwards, the thermoplastic strip contacts with a plastic package bag in advance, meanwhile, interfaces on two sides of the plastic package are released, when the transverse moving rod continues downwards, the cutting knife cuts off the connection of the left plastic package bag and the right plastic package bag, the plastic package bag can adapt to a quick-delivery piece by matching with the detection moving mechanism, and two cutting, after the left and right sides of plastic envelope bag is by the plastic envelope, process discharging conveyor's operation, the opening has arrived around the plastic envelope bag thermoplastic runner with among discharging conveyor's the centre gripping, through the extrusion heating of thermoplastic runner for the plastic envelope bag is accomplished and is sealed, makes the plastic envelope bag separation of front and back through cutting off of cutting off piece simultaneously, forms two independent express delivery pieces.

2. The material-saving packaging machine capable of automatically adapting to the size of the express delivery box according to claim 1, characterized in that: the feeding mechanism is including being located two film rolls of plastic envelope case upper and lower bilateral symmetry, the film is rolled up and is had the plastic film who is used for making the plastic envelope bag, be equipped with two the same membrane mouths of advancing on two walls of plastic envelope case, the film process that the film was rolled up finally reachs behind the membrane mouth the upside of processing seat, express delivery piece get into between the plastic film from top to bottom, the rethread thermoplasticity runner reaches the thermoplasticity of thermoplasticity strip seals, forms independent plastic envelope bag.

3. The material-saving packaging machine capable of automatically adapting to the size of the express delivery box according to claim 1, characterized in that: the pressing mechanism comprises an air pump positioned on the upper side of the plastic package box, an air pipe extending into the plastic package cavity is arranged on the lower side of the air pump, a rotary seat is arranged on the top wall of the plastic package cavity, a push plate is rotatably connected to the lower side of the rotary seat, an elastic box is arranged on the left side of the air pipe, an elastic sliding core is slidably arranged in the elastic box, the right side of the elastic sliding core is elastically connected with the right wall of the elastic cavity through a spring, a sealing plate extending into the plastic package cavity is arranged on the left side of the elastic sliding core, the left end of the sealing plate is abutted against the right side of the push plate, the right end of the sealing plate extends into the air pipe, the right end of the sealing plate is sealed by the air pipe in an initial state, the lower end of the air pipe is connected with a pneumatic box, a pneumatic cavity is arranged in the pneumatic box, a pneumatic, the utility model discloses a plastic packaging machine, including rebound case, rebound intracavity, rebound chamber, control block, push pedal, trachea, detection moving mechanism, the rebound intracavity is equipped with the rebound chamber, the slip of rebound intracavity is equipped with the smooth core of resilience, the smooth core downside of resilience is equipped with and extends to the gangbar of plastic packaging intracavity, the gangbar lower extreme is connected the motor, be equipped with the trigger block on the chamber right wall of resilience, the trigger block right side be equipped with the control line that the trachea is connected, reach as the express delivery piece the front end promotes when handling on the seat the push pedal is left, makes the trachea intercommunication pneumatic chamber, this moment detection.

4. The material-saving packaging machine capable of automatically adapting to the size of the express delivery box according to claim 1, characterized in that: stop mechanism including connect in the tension line on push pedal lower extreme right side, be equipped with on the plastic envelope chamber diapire and block the frame, block that the frame upper end extends to the top swivelling joint of feeding conveyer belt rotates the wheel, it is equipped with the spring book to rotate the wheel center, rotate the wheel downside be equipped with the left side with the tension bar that the tension line is connected, it is connected with on the wheel right side and blocks the pole to rotate, promotes when express delivery piece left end during the push pedal, it becomes vertical form to block the pole rotation to the downside for subsequent express delivery piece can not pass through, and then when preventing to cut off the plastic envelope, causes trouble and damage simultaneously pass through after express delivery piece of push pedal downside is walked completely the elasticity of spring book will the initial position is pulled back to the push pedal.

5. The material-saving packaging machine capable of automatically adapting to the size of the express delivery box according to claim 1, characterized in that: the marking mechanism comprises two limiting rods which are positioned on the left side of the motor in an up-and-down symmetrical manner, the left end of the main shaft is connected with a connecting disc, two connecting rods are symmetrically arranged on the upper side and the lower side of the connecting disc in an up-and-down symmetrical manner, a short mark block is arranged at the lower end of the connecting rod on the lower side, a long mark block is arranged at the upper end of the connecting rod on the upper side, a stop rod is arranged on the right side of the stop rod and extends to the rear side of the connecting rod on the lower side, so that the connecting disc cannot rotate backwards, when an express item triggers the pressure button but does not touch the push plate, the connecting disc does not rotate, when the express item is longer, the push plate is pushed while the pressure button is kept triggered, so that the connecting disc rotates, the long mark block rotates to the lower side, the limiting rods are used for limiting the long mark, the pressure button has flicked, then the connecting disc does not rotate, and the short mark block can mark short marks on express mails.