CN104354930B - Automatic vegetable packer synchronizes encapsulation system - Google Patents

Abstract

The invention relates to an automatic packaging machine suitable for vegetable packaging, in particular to an automatic vegetable packaging machine synchronous packaging system; it includes a frame, a main displacement mechanism, a relative displacement mechanism, a front transmission mechanism, a rear transmission mechanism and a cutting and sealing Knife mechanism, the front transmission mechanism includes the first front moving shaft and the front conveyor belt, the rear transmission mechanism includes the first rear moving shaft and the rear conveyor belt, and the main displacement mechanism is used to control the first front moving shaft and the first rear moving shaft to move along the conveyor belt Reciprocating motion in the direction; the cutting and sealing knife mechanism includes a second power device and a cutting and sealing knife device, and the second power device is used to control the relative movement of the cutting and sealing knife device between the first front moving shaft and the first rear moving shaft The relative displacement mechanism is used to control the relative displacement between the first front moving shaft and the first rear moving shaft; the synchronous packaging system of the automatic vegetable packaging machine of the present invention can complete the cutting and sealing action without stopping the machine, has high working efficiency, and The length of the package can be adjusted conveniently.

Description

Automatic vegetable packaging machine synchronous packaging system

technical field

The invention relates to an automatic packaging machine suitable for vegetable packaging, in particular to a synchronous packaging system of the automatic vegetable packaging machine.

Background technique

Vegetable packaging machine is a special type of heat-shrinkable film automatic packaging machine. It is suitable for heat-shrinkable automatic packaging of vegetables, garlic sprouts, fruits, tomatoes, cucumbers and other products. With the improvement of Chinese people's living standards and life With the acceleration of the rhythm, the demand of Chinese people for clean vegetables will increase. Vegetable packaging machines will be widely used in the production of clean vegetables in various large supermarkets; the current automatic vegetable packaging machines usually include conveying mechanisms, horizontal sealing mechanisms and vertical The conveying mechanism includes a conveying roller, a former and a film conveying device. A single continuous packaging film is wound on the film conveying device and conveyed to the conveying roller. The conveying roller passes the packaging film through the former and the horizontal sealing mechanism in sequence. And the longitudinal sealing mechanism, when in use, the operator places the vegetables on the top surface of the packaging film, the former folds the packaging films on both sides of the vegetables and covers them on top of the vegetables, and the horizontal sealing mechanism heat-seals the packaging films covering the vegetables , at this time, the vegetables are spaced and arranged continuously in the cylindrical packaging film, and finally, the vertical sealing mechanism seals and cuts the cylindrical packaging film between adjacent vegetables through a cutting and sealing knife, that is, a continuous single package is formed A complete vegetable packaging bag; for example, the utility model patent of Chinese Patent Publication No. CN201010056Y discloses such a material packaging machine suitable for vegetable packaging.

In the prior art, the vertical sealing mechanism mainly realizes the sealing of vegetable packaging bags in two ways: 1) fixed-point packaging. In this way, the cutting and sealing knife cannot move with the movement of the packaged object, but can only The object moves to the vicinity of the cutting and sealing knife, and then the object stops moving, and the cutting and sealing knife completes the cutting and sealing action. After the cutting and sealing action is completed, the packaged object continues to move, which leads to low work efficiency; 2) Rotary cutting and sealing , in this way, the cutting and sealing knife rotates continuously around the rotating shaft. When the cutting and sealing knife turns to the lowest position, the cutting and sealing action is completed. When the cutting and sealing knife rotates, its tangential speed is consistent with the transmission speed of the conveying mechanism. In this way, The packaged object can realize continuous movement without stopping, that is, realizes synchronous packaging and improves work efficiency, but once the design of this structure is completed, it is difficult to adjust, and its packaging length is limited by the length of the cutting and sealing knife, which is inconvenient to use.

In view of the above-mentioned defects, the designer actively researches and innovates, in order to create a new structure of automatic vegetable packaging machine synchronous packaging system, so that it has more industrial value.

Contents of the invention

In order to solve the above technical problems, the object of the present invention is to provide a synchronous wrapping system of an automatic vegetable packing machine that completes the cutting and sealing action without stopping the machine, has high working efficiency, and can conveniently adjust the packing length.

The synchronous encapsulation system of the automatic vegetable packaging machine of the present invention includes a frame and a main displacement mechanism, a relative displacement mechanism, a front transmission mechanism, a rear transmission mechanism and a cutting and sealing knife mechanism arranged on the frame, wherein,

The front transmission mechanism includes a first front moving shaft, and a front conveyor belt wound on the first front moving shaft, and the rear transmission mechanism includes a first rear moving shaft, and a rear conveyor belt wound on the first rear moving shaft, The conveyor belt movement directions of the front conveyor belt and the rear conveyor belt are consistent;

The main displacement mechanism includes a first power device and a sliding seat, the first power device is used to control the reciprocating motion of the sliding seat along the moving direction of the conveyor belt and its opposite direction, and the reciprocating motion of the sliding seat is located at The rear end and the front end along the moving direction of the conveyor belt are respectively the first working position and the second working position, and the first front moving shaft and the first rear moving shaft are arranged on the sliding seat;

The cutting and sealing knife mechanism includes a second power device and a cutting and sealing knife device arranged on the sliding seat, and the second power device is used to control the cutting and sealing knife device between the first front moving shaft and the second A cutting and sealing action between the moving axes;

The relative displacement mechanism includes a third power device, and the third power device is connected to the first front moving shaft and/or the first rear moving shaft and is used to control the first front moving shaft and the first rear moving shaft. Relative displacement between the moving shafts, the distance between the first front moving shaft and the first rear moving shaft when the sliding seat is in the second working position is greater than the distance between the two when the sliding seat is in the first working position.

Further, a position sensor is also arranged above the front conveyor belt, and the position sensor is used to detect the position of the material on the front conveyor belt, and the position sensor is connected with the first power device, the second power device and the third power device. The power unit is electrically connected.

Further, the front transmission mechanism also includes a front distal fixed shaft, a front leveling fixed shaft, a second front moving shaft, and a front transmission shaft, and the front conveyor belt is wound around the front leveling fixed shaft in turn. , the front distal fixed shaft, the first front moving shaft, the second front moving shaft and the front transmission shaft for relative movement, the front distal fixed shaft, the front leveling fixed shaft and the front transmission shaft are fixed On the frame, the second front moving shaft is arranged on the sliding seat, and the relative positions of the first front moving shaft and the second front moving shaft are fixed.

Further, the rear transmission mechanism also includes a rear distal fixed shaft, a rear leveling fixed shaft, a second rear moving shaft, and a rear transmission shaft, and the rear conveyor belt is wound around the rear leveling fixed shaft in turn. , the rear distal fixed shaft, the first rear movable shaft, the second rear movable shaft and the rear transmission shaft for relative movement, the rear distal fixed shaft, the rear leveling fixed shaft and the rear transmission shaft are fixed on On the frame, the second rear moving shaft is arranged on the sliding seat, and the relative positions of the first rear moving shaft and the second rear moving shaft are fixed.

Specifically, one end of the third power device is fixed on the sliding seat, and the first rear moving shaft and the second rear moving shaft are fixed on the other end of the third power device.

Further, the cutting and sealing knife mechanism includes a support plate fixed on the sliding seat, the second power device includes a first cylinder and a second cylinder, and the cutting and sealing knife device includes an upper cutting and sealing knife group and a lower cutting and sealing knife group; the bottom of the support plate is provided with a first cylinder and a second cylinder whose fixed ends are fixed to each other, and the output end of the first cylinder passes through the support plate from bottom to top and is fixed at its end with The first connecting plate, the top surface of the first connecting plate is provided with a lower cutting and sealing knife group; the output end of the second cylinder is fixed with a second connecting plate, and the two sides of the second connecting plate are respectively fixed with vertical upward There are two sliding rods, a third connecting plate is fixed between the tops of the sliding rods, the bottom of the third connecting plate is provided with an upper cutting and sealing knife group; the supporting plate is provided with a first guide sleeve, so The sliding rod relatively slides in the first guide sleeve.

Further, the upper cutting and sealing knife set includes an upper cutting knife, and only one or both sides of the upper cutting knife can be detachably provided with an upper heat sealing mold, and the lower cutting and sealing knife set includes an upper heat sealing mold that is compatible with the upper heat sealing mold. The lower heat sealing mold corresponding to the sealing mold.

Further, the bottom of the third connecting plate is provided with a pressing plate, the upper cutting and sealing knife group is fixed on the bottom of the pressing plate, the two sides of the pressing plate are provided with second guide sleeves, and the sliding rod is positioned on the bottom of the pressing plate. The second guide sleeve relatively slides inside, and an elastic buffer is arranged between the pressing plate and the third connecting plate.

With the above solution, the present invention has at least the following advantages: 1) Since the cutting and sealing knife device moves synchronously with the packaged vegetables, the continuous heat-sealing and cutting process can be completed without stopping the machine, and the work efficiency is high; 2) For different lengths For the packaged vegetables, only need to adjust the motion time nodes of the first power unit, the second power unit and the third power unit to realize the adjustment of the packaging length; 3) Due to the separation of the first front moving shaft and the first rear moving shaft The process is carried out synchronously with the exposing process of the cutting and sealing knife device, so that even if the packaged article is small, it will not fall from the gap between the first front moving shaft and the first rear moving shaft.

The above description is only an overview of the technical solutions of the present invention. In order to understand the technical means of the present invention more clearly and implement them according to the contents of the description, the preferred embodiments of the present invention and accompanying drawings are described in detail below.

Description of drawings

Fig. 1 is a schematic structural view of the synchronous encapsulation system of the automatic vegetable packaging machine of the present invention;

Fig. 2 is the front view of the synchronous encapsulation system of the automatic vegetable packaging machine of the present invention;

Fig. 3 is a sectional view of the synchronous packaging system of the automatic vegetable packaging machine of the present invention;

Fig. 4 is a schematic structural view of the cutting and sealing knife mechanism in the present invention;

Fig. 5 is a structural schematic diagram of the relative displacement mechanism in the present invention.

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore It should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Embodiment one

Referring to Fig. 1 to Fig. 5, the synchronous encapsulation system of the automatic vegetable packaging machine of the present invention includes a frame 1 and a main displacement mechanism 2, a relative displacement mechanism 3, a front transmission mechanism 4, a rear transmission mechanism 5 and Cutting and sealing knife mechanism 6, wherein, the front transmission mechanism 4 includes the first front moving shaft 401 and the front conveyor belt 402 wound on the first front moving shaft, and the rear transmission mechanism 5 includes the first rear moving shaft 501 and the first front moving shaft 402 wound on the second The rear conveyor belt 502 on the rear moving shaft, the conveyor belt movement direction of the front conveyor belt 402 and the rear conveyor belt 502 is consistent; the main displacement mechanism 2 includes the first power unit 201 and the sliding seat 202, and the first power unit 201 is used to control the sliding seat 202 in the For the reciprocating motion along the moving direction of the conveyor belt and its opposite direction, it should be noted that any first power device that can realize the above functions can be used, such as hydraulic cylinders, air cylinders, motors, etc. In this embodiment, it is more preferred, The first power device is set as a servo motor, and the rear end and front end located along the moving direction of the conveyor belt in the reciprocating motion of the sliding seat 202 are respectively the first working position and the second working position, and the first front moving shaft 401 and the first rear moving shaft 501 is arranged on the sliding seat 202; for the fixing of the first front moving shaft 401 and the first rear moving shaft 501, a fixed iron plate 203 can be set on the sliding seat, and then the first front moving shaft 401 and the first rear moving shaft 501 is fixed on the fixed iron plate 203, and other methods can also be used, such as setting a linkage device. Any device that can realize linkage between the first front moving shaft, the first rear moving shaft and the sliding seat should fall into the protection of the present invention. scope.

The cutting and sealing knife mechanism 6 includes a second power device 601 and a cutting and sealing knife device 602 arranged on the sliding seat 202. The cutting and sealing knife device 602 is linked with the sliding seat in the direction of movement of the sliding seat. It should be noted that any The second power device with the above functions can be used, such as hydraulic cylinder, cylinder, motor, etc., in this embodiment, preferably, the second power device is set to a cylinder; the second power device 601 is used to control the cutting and sealing knife device 602 In the cutting and sealing action between the first front moving shaft 401 and the first rear moving shaft 501 , the moving direction of the cutting and sealing action is towards the conveying plane of the front conveyor belt 402 and the rear conveyor belt 502 .

The relative displacement mechanism 3 includes a third power device 301, the third power device 301 is connected to the first front moving shaft 401 and/or the first rear moving shaft 501 in transmission, and is used to control the first front moving shaft 401 and the first rear moving shaft The relative displacement between 501, it should be noted that any third power device that can realize the above functions can be used, such as hydraulic cylinders, air cylinders, motors, etc., in this embodiment, preferably, the third power device is set to For the air cylinder, the distance between the first front moving shaft 401 and the first rear moving shaft 501 when the sliding seat 202 is in the second working position is greater than the distance between the two when the sliding seat is in the first working position.

The working principle of the present invention is as follows: just connect the synchronous encapsulation system of the present invention to the rear side of the horizontal sealing mechanism of the packaging machine in the prior art. When in use, the vegetables are placed on the packaging machine. The detection device automatically controls or manually controls the first power device to synchronously move the first front moving shaft 401, the first rear moving shaft 501 and the cutting and sealing knife mechanism, and at the same time, the relative displacement mechanism further adjusts the first front moving The distance between the shaft 401 and the first rear moving shaft 501 is such that when the sliding seat moves from the first working position to the second working position, the first front moving shaft 401 is relatively separated from the first rear moving shaft 501 and exposes the cut The sealing knife device, the cutting and sealing knife device realizes the heat sealing and cutting of the packaged vegetables by rising, falling or the relative movement of the upper and lower parts at the same time; this method has many advantages: 1) Since the cutting and sealing knife device Vegetables move synchronously, so that the continuous heat-sealing and cutting process can be completed without stopping the machine, and the work efficiency is high; 2) For packaged vegetables of different lengths, only need to adjust the power of the first power unit, the second power unit and the third power unit 3) Since the separation process of the first front moving axis and the first rear moving axis is carried out synchronously with the exposing process of the cutting and sealing knife device, even if the packaged items are small, the will fall through the gap between the first front axis of movement and the first rear axis of movement.

For the control of each power device, the automatic vegetable packaging machine synchronous encapsulation system of the present invention can adopt various methods, such as adopting photoelectric sensors, or adopting the mode of manual control, because the mode of manual control is relatively simple, the specification document of the present invention This will not be described in detail; in order to realize the automatic packaging process of vegetables, it is more preferable to implement it by means of sensors, and a position sensor (not shown) is also arranged above the front conveyor belt 402, and the position sensor is used to detect whether the vegetables are located on the front conveyor belt 402. The position of the material, and the position sensor is electrically connected with the first power device 201 , the second power device 601 and the third power device 301 .

Embodiment two

In the synchronous encapsulation system of the automatic vegetable packaging machine of the present invention, the first front moving shaft 401 and the first rear moving shaft 501 can realize synchronous movement. However, during the movement, the relative positions of the front conveyor belt and the rear conveyor belt have changed. This can be achieved by adopting various schemes, for example, connecting the tensioning mechanism to the front conveyor belt and the rear conveyor belt, or setting the front conveyor belt and the rear conveyor belt as elastic conveyor belts to ensure that the conveyor belts are always in a tensioned state. This embodiment proposes a more preferred solution, through the linkage of multiple moving shafts, the adjustment of the conveyor belt is realized, so that it is not necessary to adjust the relative length of the conveyor belt; in addition, the relative displacement mechanism is for the first front moving shaft 401 and the first The adjustment of the relative position of the rear moving shaft 501 can be realized by adjusting the relative position of the first front moving shaft 401 and the sliding seat, or by adjusting the relative position of the first rear moving shaft 501 and the sliding seat, or by simultaneously adjusting the first The relative position of a front moving shaft 401 and the first rear moving shaft 501 and the sliding seat is realized. In this embodiment, only the relative displacement mechanism is used to adjust the relative position of the first rear moving shaft 501 and the sliding seat as an example. The scheme is specific See below:

The front transmission mechanism 4 also includes a front distal fixed shaft 403, a front level fixed shaft 404, a second front moving shaft 405, and a front transmission shaft 406. The front conveyor belt 402 is wound around the front side leveling fixed shaft 404, front Side distal fixed shaft 403, the first front moving shaft 401, the second front moving shaft 405, and the front transmission shaft 406 move relative to each other, and the front distal fixed shaft 403, the front leveling fixed shaft 404, and the front transmission shaft 406 is fixed on the frame, the second front moving shaft 405 is arranged on the sliding seat 202, and the relative positions of the first front moving shaft 401 and the second front moving shaft 405 are fixed.

The rear transmission mechanism 5 also includes a rear distal fixed shaft 503, a rear leveling fixed shaft 504, a second rear moving shaft 505, and a rear transmission shaft 506. The rear conveyor belt 502 is wound around the rear leveling fixed shaft 504, rear Side far-end fixed shaft 503, the first rear moving shaft 501, the second rear moving shaft 505 and the rear side transmission shaft 506 relatively move, the rear side distal fixed shaft 503, the rear side leveling fixed shaft 504 and the rear side transmission shaft 506 is fixed on the frame, the second rear moving shaft 505 is arranged on the sliding seat 202, and the relative positions of the first rear moving shaft 501 and the second rear moving shaft 505 are fixed.

Fixing between the third power unit and the first rear moving shaft and the second rear moving shaft can be in various ways, for example, the fixed end of the third power unit is fixed on the sliding seat, and the first rear moving shaft and the second The rear moving shaft is fixed on the piston end of the third power unit, or the piston end of the third power unit can be fixed on the sliding seat, and the first rear moving shaft and the second rear moving shaft are fixed on the fixed end of the third power unit; In the embodiment, as shown in Figure 5, the former method is adopted, the fixed end of the third power device 301 is fixed on the fixed iron plate 203 of the sliding seat 202, and the first rear moving shaft 501 and the second rear moving shaft 505 are fixed On the connecting frame 507 , the connecting frame 507 is fixed on the movable end of the third power device 301 .

Embodiment Three

In the synchronous encapsulation system of the automatic vegetable packaging machine of the present invention, the cutting and sealing knife mechanism can adopt the mode of single cutting and sealing knife or the mode of double cutting and sealing knife; if the mode of single cutting and sealing knife is adopted, the cutting and sealing knife can be combined with the cutting and sealing knife The mold sealing cooperates with each other, and the cutting and sealing knife is set below between the first front moving shaft 401 and the first rear moving shaft 501, and can also be set above between the first front moving shaft 401 and the first rear moving shaft 501, When the sliding seat slides to the second working position, the cutting and sealing knife is exposed under the action of the second power device and completes the cutting and sealing action; if the double cutting and sealing knife is used, the upper and lower cutting and sealing knife group and the For the lower cutting and sealing knife group, one of the technical solutions is given in this embodiment, as follows:

The cutting and sealing knife mechanism 6 includes a support plate 603 fixed on the sliding seat, the second power device 601 includes a first cylinder 604 and a second cylinder 605, and the cutting and sealing knife device 602 includes an upper cutting and sealing knife group 606 and a lower cutting and sealing knife group 607 The bottom of the support plate 603 is provided with a first cylinder 604 and a second cylinder 605 whose fixed ends are fixed to each other, and the output end of the first cylinder 604 passes through the support plate 603 from bottom to top, and is fixed with a first cylinder 605 at its end. A connecting plate 608, the top surface of the first connecting plate 608 is provided with a lower cutting and sealing knife group 607; the output end of the second cylinder 605 is fixed with a second connecting plate 609, and two vertical upwards A sliding bar 610, a third connecting plate 611 is fixed between the tops of the sliding bar 610, the bottom of the third connecting plate 611 is provided with an upper cutting and sealing knife group 606; the supporting plate 603 is provided with a first guide sleeve 612, and the sliding bar 610 slides relatively within the first guide sleeve 612 .

The upper cutting and sealing knife group 606 includes an upper cutting knife, and only one or both sides of the upper cutting knife can be detachably provided with an upper heat-sealing mold, and the lower cutting and sealing knife group 607 includes a lower heat-sealing mold corresponding to the upper heat-sealing mold ; When the packaged vegetables and other materials only need to be sealed on one side and the other side needs to be kept open due to the need for freshness, the upper and lower heat-sealing molds on the corresponding side can be removed.

In order to prevent the upper cutting and sealing knife group from colliding with the lower cutting and sealing knife group when it moves downward, or the cutting and sealing operation pressure is too high, a pressing plate 613 is arranged at the bottom of the third connecting plate 611, and the upper cutting and sealing knife group 606 is fixed on the bottom of the pressing plate 613. At the bottom, the two sides of the pressing plate 613 are provided with a second guide sleeve 614, the slide bar 610 slides relatively in the second guide sleeve 614, and an elastic buffer (not shown) is arranged between the pressing plate 613 and the third connecting plate 611; , the cutting and sealing operation can be effectively guaranteed through the elastic buffer, and the cutting and sealing knife can also be protected at the same time.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements can be made without departing from the technical principle of the present invention. and modifications, these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (8)

1. A synchronous encapsulation system for an automatic vegetable packaging machine, characterized in that: it comprises a frame and a main displacement mechanism, a relative displacement mechanism, a front transmission mechanism, a rear transmission mechanism and a cutting and sealing knife mechanism arranged on the frame, wherein, The front transmission mechanism includes a first front moving shaft, and a front conveyor belt wound on the first front moving shaft, and the rear transmission mechanism includes a first rear moving shaft, and a rear conveyor belt wound on the first rear moving shaft, The conveyor belt movement directions of the front conveyor belt and the rear conveyor belt are consistent; The main displacement mechanism includes a first power device and a sliding seat, the first power device is used to control the reciprocating motion of the sliding seat along the moving direction of the conveyor belt and its opposite direction, and the reciprocating motion of the sliding seat is located at The rear end and the front end along the moving direction of the conveyor belt are respectively the first working position and the second working position, and the first front moving shaft and the first rear moving shaft are arranged on the sliding seat; The cutting and sealing knife mechanism includes a second power device and a cutting and sealing knife device arranged on the sliding seat, and the second power device is used to control the cutting and sealing knife device between the first front moving shaft and the second A cutting and sealing action between the moving axes; The relative displacement mechanism includes a third power device, and the third power device is connected to the first front moving shaft and/or the first rear moving shaft and is used to control the first front moving shaft and the first rear moving shaft. Relative displacement between the moving shafts, the distance between the first front moving shaft and the first rear moving shaft when the sliding seat is in the second working position is greater than the distance between the two when the sliding seat is in the first working position. 2. The automatic vegetable packaging machine synchronous encapsulation system according to claim 1, characterized in that: a position sensor is also arranged above the front conveyor belt, and the position sensor is used to detect the position of the material on the front conveyor belt, and The position sensor is electrically connected with the first power device, the second power device and the third power device. 3. The synchronous encapsulation system of the automatic vegetable packaging machine according to claim 1, characterized in that: the front transmission mechanism also includes a front distal fixed shaft, a front leveling fixed shaft, a second front moving shaft and a front side transmission shaft, the front conveyor belt is wound on the front side leveling fixed shaft, the front side distal fixed shaft, the first front moving shaft, the second front moving shaft and the front side transmission shaft for relative movement, the front The side distal fixed shaft, the front side leveling fixed shaft and the front transmission shaft are fixed on the frame, the second front moving shaft is arranged on the sliding seat, and the first front moving shaft is connected to the second front moving shaft. The relative positions of the two front moving axes are fixed. 4. The automatic vegetable packaging machine synchronous encapsulation system according to claim 1, characterized in that: the rear transmission mechanism also includes a rear distal fixed shaft, a rear leveling fixed shaft, a second rear moving shaft and a rear side transmission shaft, the rear conveyor belt is wound around the rear leveling fixed shaft, the rear distal end fixed shaft, the first rear moving shaft, the second rear moving shaft and the rear transmission shaft for relative movement, the rear The side distal fixed shaft, the rear leveling fixed shaft and the rear transmission shaft are fixed on the frame, the second rear moving shaft is arranged on the sliding seat, and the first rear moving shaft is connected to the second rear moving shaft. The relative positions of the two rear moving axes are fixed. 5. The synchronous packaging system of the automatic vegetable packaging machine according to claim 1, characterized in that: one end of the third power device is fixed on the sliding seat, and the first rear moving shaft and the second rear moving shaft The shaft is fixed at the other end of the third power device. 6. The automatic vegetable packaging machine synchronous packaging system according to claim 1, characterized in that: the cutting and sealing knife mechanism includes a support plate fixed on the sliding seat, and the second power device includes a first cylinder and a second Two cylinders, the cutting and sealing knife device includes an upper cutting and sealing knife group and a lower cutting and sealing knife group; the bottom of the support plate is provided with a first cylinder and a second cylinder whose fixed ends are fixed to each other, and the first cylinder The output end passes through the support plate from bottom to top, and a first connecting plate is fixed at its end, and the top surface of the first connecting plate is provided with a lower cutting and sealing knife group; the output end of the second cylinder is fixed with The second connecting plate, two vertically upward sliding bars are respectively fixed on both sides of the second connecting plate, a third connecting plate is fixed between the tops of the sliding bars, and the bottom of the third connecting plate is provided with The upper cutting and sealing knife group; the support plate is provided with a first guide sleeve, and the sliding rod slides relatively in the first guide sleeve. 7. The automatic vegetable packaging machine synchronous sealing system according to claim 6, characterized in that: the upper cutting and sealing knife set includes an upper cutting knife, and only one side or both sides of the upper cutting knife can be detached An upper heat-sealing mold is provided, and the lower cutting and sealing knife group includes a lower heat-sealing mold corresponding to the upper heat-sealing mold. 8. The automatic vegetable packaging machine synchronous sealing system according to claim 6, characterized in that: a pressing plate is provided at the bottom of the third connecting plate, and the upper cutting and sealing knife group is fixed on the bottom of the pressing plate, so that Two sides of the pressure plate are provided with second guide sleeves, the sliding rod slides relatively in the second guide sleeves, and an elastic buffer is provided between the pressure plate and the third connecting plate.