阅读说明：本技术 一种环保食品袋封边后处理方法 (Environment-friendly food bag edge sealing post-treatment method ) 是由 吴波 于 2020-07-13 设计创作，主要内容包括：本发明提供了一种环保食品袋封边后处理方法,由输送线、放置框、压匀单元、拉紧单元、U型架、升降气缸和挤压单元配合完成的作业,本发明可以解决人员需要通过肉眼来判断食品袋表面的褶皱情况,在将其单个取出拍打,且拍打时需要往复拍打、拉扯,消耗的时间较长,导致人工拍打效率较慢,从而不适用于流水线生产,通过增加人数来弥补效率又往往会增加生产成本,人工拍打后的食品袋外表面仍会有一定的折痕,且外观形状难以做到统一化等问题。(The invention provides an edge sealing post-processing method for an environment-friendly food bag, which is used for solving the problems that personnel need to judge the wrinkle condition of the surface of the food bag through naked eyes, take the food bag out and flap the food bag singly, need to flap and drag the food bag repeatedly during flapping, consume longer time, cause slower manual flapping efficiency, are not suitable for flow line production, compensate the efficiency through increasing the number of people, often increase the production cost, still have certain creases on the outer surface of the food bag after manual flapping, and are difficult to unify the appearance and the shape.)

1. The utility model provides an environmental protection food bag banding aftertreatment method, it has used a pressure even equipment, should press even equipment including transfer chain (1), place frame (2), press even unit (3), tensioning unit (4), U type frame (5), lift cylinder (6) and extrusion unit (7), its characterized in that: the method for processing the environment-friendly food bag after edge sealing by adopting the uniform pressing equipment comprises the following steps:

s1, edge sealing: performing edge sealing treatment on the food bag containing the food;

s2, intermittent conveying: opening the uniform pressing unit (3), putting the food bag filled with food into the placing frame (2), closing the uniform pressing unit (3) again, and driving the placing frame (2) to carry out cyclic intermittent conveying through the conveying line (1);

s3, homogenizing: when the placing frame (2) enters the U-shaped frame (5), the conveying line (1) stops conveying, the lifting cylinder (6) drives the extrusion unit (7) to descend, the pressing mechanisms (37) are driven to descend sequentially under the action of extrusion force so as to uniformly press all parts of the food bags sequentially, and after uniform pressing, the two series mechanisms (46) are electrified to drive the food bags in clamping to be tensioned reversely to two sides, so that uniform distribution of food inside the food bags is ensured;

s4, taking out: after uniform pressing, the extrusion unit (7) is driven to rise back through the lifting cylinder (6), the conveying line (1) continues conveying, and the uniformly pressed food bag is taken out by personnel to be horizontally placed;

the conveying line (1) is uniformly provided with a placing frame (2), the front end and the rear end inside the placing frame (2) are symmetrically provided with uniform pressing units (3), the front end and the rear end of the bottom end of the placing frame (2) are symmetrically provided with tensioning units (4), the right end of the conveying line (1) is provided with a U-shaped frame (5), the upper end of the U-shaped frame (5) is provided with a lifting cylinder (6), and the ejection end of the lifting cylinder (6) is provided with an extrusion unit (7);

the uniform pressing unit (3) comprises a turning plate (31), a locking mechanism (32), two fixed plates (33), two built-in springs (34), an extrusion rod (35), an extrusion block (36), a pressing mechanism (37) and a linkage frame (38), the outer end of the turning plate (31) is connected with the placing frame (2) through a pin shaft, a locking mechanism (32) is installed on the outer side wall of the placing frame (2), pressing mechanisms (37) are uniformly arranged on the turning plate (31) from front to back, two fixing plates (33) are arranged at the left end and the right end of the turning plate (31), the two fixing plates (33) are connected with an extrusion rod (35) in a sliding fit mode, built-in springs (34) are connected onto the side walls of the extrusion rod (35) and the fixing plates (33), extrusion blocks (36) are uniformly arranged at the lower end of the extrusion rod (35), and a linkage frame (38) is installed on the pressing mechanisms (37) located on the outermost side;

the pressing mechanism (37) comprises a lifting block (371), a connecting spring (372), an expansion link (373), a buffer block (374), an extrusion rod (375), a pressing plate (376), a working spring (377), a pressing bag (378) and a pressed block (379), wherein the lifting block (371) is connected with the turning plate (31) in a sliding fit manner, the connecting spring (372) is connected between the lifting block (371) and the turning plate (31), the pressed block (379) is installed at the upper end of the lifting block (371), the expansion link (373) is connected between the lower end of the lifting block (371) and the buffer block (374), a sleeving hole is formed in the middle of the buffer block (374), the extrusion rod (375) is arranged in the sleeving hole, the inner side of the lower end of the lifting block (371) is connected with the inner side of the pressing plate (376) through a pin shaft, the working spring (377) is connected between the lifting block (376) and the middle of the upper end of, a pressing bag (378) is arranged at the lower end of the pressing plate (376);

tensioning unit (4) including holding frame (41), press anchor clamps (42), reset spring (43), electric putter (44), insulating frame (45) and serial connection mechanism (46), the inside of insulating frame (45) is equipped with serial connection mechanism (46), install electric putter (44) on insulating frame (45), holding frame (41) are installed to the ejecting end of electric putter (44), be connected for sliding fit between the upper end of holding frame (41) and press anchor clamps (42), even have reset spring (43) between holding frame (41) and press anchor clamps (42).

2. The edge sealing post-treatment method for the environment-friendly food bag according to claim 1, wherein: the extrusion unit (7) comprises an extrusion block (71) and rolling rollers (72), the extrusion block (71) is installed at the ejection end of the lifting cylinder (6), and the rolling rollers (72) are symmetrically arranged at the front end and the rear end of the extrusion block (71) through pin shafts.

3. The edge sealing post-treatment method for the environment-friendly food bag according to claim 1, wherein: locking mechanism (32) include mounting panel (321), pivot (322) and limiting plate (323), mounting panel (321) are installed on the lateral wall of placing frame (2), the lower extreme of mounting panel (321) and pivot (322) is the bearing connection, limiting plate (323) are installed to the upper end of pivot (322).

4. The edge sealing post-treatment method for the environment-friendly food bag according to claim 1, wherein: the inner end surface of the extrusion rod (35) is of a structure which is gradually inclined inwards from top to bottom.

5. The edge sealing post-treatment method for the environment-friendly food bag according to claim 1, wherein: the distance between the pressed block (379) and the extrusion block (36) is gradually reduced from outside to inside, and clear water is filled in the pressing bag (378).

6. The edge sealing post-treatment method for the environment-friendly food bag according to claim 1, wherein: two inner grooves are formed in the upper end and the lower end of the extrusion rod (375), and anti-drag beads are placed in the inner grooves.

7. The edge sealing post-treatment method for the environment-friendly food bag according to claim 1, wherein: the linkage frame (38) is fixedly connected with the lifting block (371) arranged on the outermost side, and the lower end of the linkage frame (38) is connected with the drag reduction roller through a pin shaft.

8. The edge sealing post-treatment method for the environment-friendly food bag according to claim 1, wherein: the inner wall of the clamping frame (41) is evenly provided with clamping teeth, the clamping teeth are of a triangular structure, the lower end face of the pressing clamp (42) is evenly provided with clamping blocks, and the clamping blocks and the clamping teeth are arranged in a vertically staggered mode.

9. The edge sealing post-treatment method for the environment-friendly food bag according to claim 1, wherein: series connection mechanism (46) include group battery (461), wire (462), conducting block (463) and contact piece (464), install group battery (461) on insulating frame (45), contact piece (464) are installed to the outer end of pressing down anchor clamps (42), install conducting block (463) on the lateral wall of holding frame (41), and group battery (461), electric putter (44), pass through wire (462) series connection between conducting block (463) and the contact piece (464), be separation status between conducting block (463) and the contact piece (464).

Technical Field

The invention relates to the technical field of food packaging, in particular to an edge sealing post-treatment method for an environment-friendly food bag.

Background

Generally in to food packaging process, need carry out the banding to the wrapping bag that is equipped with food and handle, but, on the one hand, in fluidic food banding and transportation process, the fold can appear in some wrapping bags, and on the other hand, the fluidic food upwards gathers by the bag bottom in the bag during encapsulation, and it is inhomogeneous to lead to the interior food of bag to distribute, the whole unevenness of bagging-off to influence going on of next process, to this condition, traditional mode adopts the manual work to pat the food bag, claps its smooth mode one by one, however, this kind of mode can often have following problem:

personnel need judge the fold condition on food bag surface through the naked eye, take out it singly and pat, and need reciprocal the patting when patting, drag, the time of consumption is longer, leads to artifical patting efficiency slower to be not applicable to streamlined production, remedy efficiency through increasing the number and often can increase manufacturing cost again, the food bag outer surface after artifical patting still has certain crease, and the appearance shape is difficult to accomplish unification.

Disclosure of Invention

In order to solve the problems, the invention provides a method for processing the edge sealing of an environment-friendly food bag, which can solve the problems that personnel need to judge the wrinkle condition of the surface of the food bag through naked eyes, take the food bag out and flap the food bag singly, need to flap and drag repeatedly during flapping, consume long time, cause slow manual flapping efficiency, are not suitable for flow line production, compensate efficiency through increasing the number of people, increase production cost frequently, have certain creases on the outer surface of the food bag after manual flapping, and are difficult to unify the appearance and the like.

In order to achieve the purpose, the invention adopts the following technical scheme that a uniform pressing device is used, the uniform pressing device comprises a conveying line, a placing frame, a uniform pressing unit, a tensioning unit, a U-shaped frame, a lifting cylinder and an extrusion unit, and the method for processing the edge of the environment-friendly food bag after edge sealing is as follows:

s1, edge sealing: performing edge sealing treatment on the food bag containing the food;

s2, intermittent conveying: opening the uniform pressing unit, putting the food bag filled with food into the placing frame, closing the uniform pressing unit again, and driving the placing frame to carry out cyclic intermittent conveying through the conveying line;

s3, homogenizing: when the placing frame enters the U-shaped frame, the conveying line stops conveying, the lifting cylinder drives the extrusion unit to descend, the pressing mechanism is driven to descend sequentially under the action of extrusion force so as to sequentially and uniformly press all parts of the food bags, and after uniform pressing, the two series mechanisms are electrified to drive the food bags in clamping to be tensioned reversely to two sides, so that uniform distribution of food inside the food bags is ensured;

s4, taking out: after the food bag is uniformly pressed, the lifting cylinder drives the extrusion unit to rise back, the conveying line continues to convey the food bag, and the uniformly pressed food bag is taken out by a person to be horizontally placed.

Evenly be equipped with on the conveyer line and place the frame, place the inside front and back both ends symmetry of frame and install and press even unit, place the frame bottom around both ends symmetry and install taut unit, U type frame is installed to the right-hand member of conveyer line, and the lift cylinder is installed to the upper end of U type frame, and extrusion unit is installed to the ejecting end of lift cylinder.

The uniform pressing unit comprises a turning plate, a locking mechanism, two fixing plates, two built-in springs, an extrusion rod, an extrusion block, a pressing mechanism and a linkage frame, wherein the outer end of the turning plate is connected with a placing frame through a pin shaft, the locking mechanism is installed on the outer side wall of the placing frame, the locking mechanism is used for carrying out angle limitation on the turning plate after the work is stopped, the pressing mechanism is uniformly arranged on the turning plate from front to back, the two fixing plates are arranged at the left end and the right end of the turning plate and are connected with the extrusion rod through a sliding fit mode, the built-in springs are connected on the side walls of the extrusion rod and the fixing plates and play a role of reset connection, the extrusion block is uniformly arranged at the lower end of the extrusion rod, the linkage frame is installed on the pressing mechanism arranged at the outermost side, and when the placing frame with the food bags enters the U-shaped frame during, the extrusion block is driven to descend through the lifting cylinder, the two extrusion rods are driven to move reversely under the action of extrusion force, and the extrusion rods moving reversely can drive the extrusion blocks to move synchronously, so that the pressing mechanisms arranged from inside to outside are sequentially extruded, and all parts of the food bag are uniformly pressed one by one.

The pressing mechanism comprises a lifting block, a connecting spring, a telescopic rod, a buffer block, an extrusion rod, a pressing plate, a working spring, a pressing bag and a pressed block, wherein the lifting block is connected with a turning plate in a sliding fit manner, the lifting block is connected with the turning plate in a connecting spring manner, the connecting spring plays a role in resetting, the pressed block is installed at the upper end of the lifting block, the telescopic rod is connected between the lower end of the lifting block and the buffer block, a sleeving hole is formed in the middle of the buffer block, the extrusion rod is arranged in the sleeving hole, the inner side of the lower end of the lifting block is connected with the inner side of the pressing plate in a pin shaft manner, the working spring is connected with the middle of the upper end of the lifting block and the upper end of the pressing plate and plays a role in resetting, the pressing bag is installed at the lower end of the pressing plate, the lifting block descends under the extrusion of the extrusion block during specific work, the buffer block that stops in step is close to gradually with the elevator that continues to descend, and at this moment, drive the extrusion pole through the elevator and descend to extrusion buffer block to the horizontality, and then press the food bag evenly, and every presses the pressing means on the even unit to the food bag descending order for descending the step-down in proper order from inside to outside evenly, and the order that each part of food bag was pressed does, and the middle part is at first pressed the back, is pressed both sides gradually around to in proper order.

The tensioning unit comprises a clamping frame, a pressing clamp, a reset spring, an electric push rod, an insulating frame and a series mechanism, wherein the series mechanism is arranged in the insulating frame, the electric push rod is arranged on the insulating frame, the clamping frame is arranged at the ejection end of the electric push rod, the upper end of the clamping frame is connected with the pressing clamp in a sliding fit manner, the reset spring is connected between the clamping frame and the pressing clamp and plays a role in resetting, when the tensioning unit works specifically, the linkage frame is driven to descend synchronously when the pressing mechanism at the outermost side of the placing frame descends, after the pressing mechanism at the outermost side of the placing frame descends, the food bag is uniformly pressed, meanwhile, the descending linkage frame drives the pressing clamp to descend so as to clamp one end (the front end or the rear end) of the food bag with the clamping frame, at the moment, the series mechanism forms a complete series circuit, the electric push rod after being electrified drives the food bag in clamping to be pulled, two electric putter on two tensioning unit drive the front and back both ends of food bag and carry out reverse tensioning, have further guaranteed the evenly distributed of the inside food of food bag.

Preferably, the extrusion unit comprises an extrusion block and rolling rollers, the extrusion block is mounted at the ejection end of the lifting cylinder, and the rolling rollers are symmetrically arranged at the front end and the rear end of the extrusion block through pin shafts.

Preferably, locking mechanism include mounting panel, pivot and limiting plate, the mounting panel is installed on the lateral wall of placing the frame, the mounting panel is connected for the bearing with the lower extreme of pivot, the limiting plate is installed to the upper end of pivot.

Preferably, the inner end surface of the extrusion rod is gradually inclined inwards from top to bottom.

Preferably, the distance between the pressure-receiving block and the extrusion block is gradually reduced from outside to inside, and clear water is filled in the pressing bag.

Preferably, the upper end and the lower end of the extrusion rod are provided with two inner grooves, and drag reduction beads are placed in the inner grooves.

Preferably, the linkage frame is fixedly connected with the lifting block arranged on the outermost side, and the lower end of the linkage frame is connected with the drag reduction roller through a pin shaft.

Preferably, the inner wall of the clamping frame is uniformly provided with clamping teeth, the clamping teeth are of a triangular structure, and the lower end face of the pressing clamp is uniformly provided with clamping blocks.

Preferably, the series mechanism comprises a battery pack, a lead, a conductive block and a contact block, the battery pack is mounted on the insulating frame, the contact block is mounted at the outer end of the pressing clamp, the conductive block is mounted on the outer side wall of the clamping frame, the battery pack, the electric push rod, the conductive block and the contact block are connected in series through the lead, and the conductive block and the contact block are in a separated state.

The invention has the beneficial effects that:

according to the invention, the food bag is subjected to unified treatment by adopting a design concept of integration of linked pressing, uniformly pulling and the like, so that people do not need to observe and take out the conveyed food bag, the appearance of the processed food bag is unified by mechanical pressing, uniformly pulling and the like, the pressing efficiency is improved, and the method is suitable for flow line production;

the invention provides a method for processing the environment-friendly food bag after edge sealing, wherein the uniform pressing unit gradually presses the upper end of the food bag uniformly, and the uniform pressing sequence is that the middle part of the food bag is firstly uniformly pressed, and then the middle part of the food bag is gradually pressed downwards towards the front side and the rear side, so that the uniform distribution of food in the food bag is ensured on one hand, and the uniform appearance of the packaging bag is ensured on the other hand;

the tensioning unit controls the electric push rod in a series circuit mode, when the food bag is uniformly pressed, the series mechanism is electrified to drive the electric push rod to tension the front end and the rear end of the food bag, so that the amount of wrinkles on the surface of the packaging bag is further reduced, the design of a linkage structure ensures that the sequence of steps of uniformly pressing and tensioning cannot be wrong, and the method is suitable for flow line production.

Drawings

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

FIG. 1 is a flow chart of a method for edge sealing and post-treatment of an environmentally friendly food bag;

FIG. 2 is a front view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is a cross-sectional view of the placement frame, the leveling unit and the tensioning unit of the present invention;

FIG. 5 is an enlarged view of the invention in section X of FIG. 4;

FIG. 6 is an enlarged view of the Y-direction portion of FIG. 3 of the present invention;

FIG. 7 is a schematic view showing the state of the present invention for leveling the food bag.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

As shown in fig. 1 to 7, a method for processing the edge sealing of the environment-friendly food bag uses a leveling device, the leveling device comprises a conveying line 1, a placing frame 2, a leveling unit 3, a tensioning unit 4, a U-shaped frame 5, a lifting cylinder 6 and an extrusion unit 7, and the method for processing the edge sealing of the environment-friendly food bag by using the leveling device comprises the following steps:

s1, edge sealing: performing edge sealing treatment on the food bag containing the food;

s2, intermittent conveying: opening the uniform pressing unit 3, putting the food bag filled with food into the placing frame 2, closing the uniform pressing unit 3 again, and driving the placing frame 2 to carry out cyclic intermittent conveying through the conveying line 1;

s3, homogenizing: when the placing frame 2 enters the U-shaped frame 5, the conveying line 1 stops conveying, the lifting cylinder 6 drives the extrusion unit 7 to descend, the pressing mechanism 37 is driven to descend sequentially under the action of extrusion force so as to press each part of the food bag uniformly in sequence, and after the food bag is pressed uniformly, the two series mechanisms 46 are electrified to drive the food bag in clamping to be tensioned reversely to two sides, so that the uniform distribution of food inside the food bag is ensured;

s4, taking out: after the uniform pressing, the lifting cylinder 6 drives the extrusion unit 7 to rise again, the conveying line 1 continues conveying, and the uniformly pressed food bag is taken out by a person to be horizontally placed.

Evenly be equipped with on the transfer chain 1 and place frame 2, place frame 2 inside front and back both ends symmetry and install and press even unit 3, place frame 2 bottom front and back both ends symmetry and install taut unit 4, U type frame 5 is installed to the right-hand member of transfer chain 1, and lift cylinder 6 is installed to the upper end of U type frame 5, and extrusion unit 7 is installed to the ejecting end of lift cylinder 6.

The uniform pressing unit 3 comprises a turning plate 31, a locking mechanism 32, two fixed plates 33, two built-in springs 34, an extrusion rod 35, an extrusion block 36, a pressing mechanism 37 and a linkage frame 38, the outer end of the turning plate 31 is connected with the placing frame 2 through a pin shaft, the locking mechanism 32 is installed on the outer side wall of the placing frame 2, the locking mechanism 32 limits the angle of the turning plate 31 after stopping working, the pressing mechanism 37 is uniformly arranged on the turning plate 31 from front to back, the two fixed plates 33 are arranged at the left end and the right end of the turning plate 31, the two fixed plates 33 are connected with the extrusion rod 35 in a sliding fit mode, the built-in springs 34 are connected on the side walls of the extrusion rod 35 and the fixed plates 33, the built-in springs 34 play a role in reset connection, the extrusion blocks 36 are uniformly arranged at the lower end of the extrusion rod 35, the linkage frame 38 is installed on the pressing mechanism 37 arranged, when the placing frame 2 filled with the food bags enters the U-shaped frame 5, the conveying line 1 stops conveying, the lifting cylinder 6 drives the extrusion block 71 to descend, the two extrusion rods 35 are driven to move in opposite directions under the action of extrusion force, the extrusion rods 35 which move in opposite directions can drive the extrusion blocks 36 to move synchronously, and therefore the pressing mechanisms 37 which are arranged from inside to outside are sequentially extruded, and all parts of the food bags are uniformly pressed one by one.

The locking mechanism 32 comprises a mounting plate 321, a rotating shaft 322 and a limiting plate 323, the mounting plate 321 is mounted on the outer side wall of the placing frame 2, the lower ends of the mounting plate 321 and the rotating shaft 322 are connected through a bearing, the upper end of the rotating shaft 322 is provided with the limiting plate 323, and after the turnover mechanism stops working, the position of the turnover plate 31 is positioned through the limiting plate 323.

The inner end surface of the extrusion rod 35 is of a structure which gradually inclines inwards from top to bottom, so that the extrusion difficulty is reduced.

The pressing mechanism 37 comprises a lifting block 371, a connecting spring 372, an expansion link 373, a buffer block 374, an extrusion rod 375, a pressing plate 376, a working spring 377, a pressing bag 378 and a pressed block 379, wherein the lifting block 371 is connected with the turning plate 31 in a sliding fit manner, the connecting spring 372 is connected between the lifting block 371 and the turning plate 31, the connecting spring 372 plays a role in resetting, the pressed block 379 is installed at the upper end of the lifting block 371, the expansion link 373 is connected between the lower end of the lifting block 371 and the buffer block 374, a sleeving hole is formed in the middle of the buffer block 374, the extrusion rod 375 is arranged in the sleeving hole, the inner side of the lower end of the lifting block 371 is connected with the inner side of the pressing plate 376 through a pin shaft, the working spring 377 is connected with the middle of the upper end of the pressing plate 376, the working spring 377 plays a role in resetting, the pressing bag 378 is installed at the lower end of the pressing plate 376, and the lifting block descends, thereby it pushes down in step to drive to press bag 378, the inboard part of pressing bag 378 stops descending with the food bag contact, the buffer block 374 that stops in step is close to gradually with the elevator 371 that continues to descend, at this moment, drive the decline of extrusion pole 375 through elevator 371, thereby extrude buffer block 374 to the horizontality, and then press the food bag evenly, every presses pressing means 37 on the even unit 3 to the food bag descending order for stepping down from inside to outside in proper order evenly, the order that each part of food bag was pressed does, the middle part is pressed the back at first, both sides are pressed gradually to the front and back in proper order.

The distance between the pressed block 379 and the extrusion block 36 is gradually reduced from outside to inside, so that the pressing contact time between the pressed block 379 and the extrusion block 36 at each position is different, the descending sequence of the lifting blocks 371 on each uniform pressing unit 3 is ensured to descend from inside to outside in sequence, clear water is injected into the inside of the pressing bag 378, and the attaching degree of the pressing bag 378 to the surface of the food bag is improved.

Two inner grooves are formed in the upper end and the lower end of the extrusion rod 375, and resistance reducing beads are placed in the inner grooves, so that extrusion resistance is reduced.

The link frame 38 and the lifting block 371 arranged on the outermost side are fixedly connected, the lower end of the link frame 38 is connected with the drag reduction roller through a pin shaft, and the difficulty of extrusion is reduced due to the arrangement of the drag reduction roller.

The tensioning unit 4 comprises a clamping frame 41, a pressing clamp 42, a return spring 43, an electric push rod 44, an insulating frame 45 and a serial mechanism 46, the serial mechanism 46 is arranged in the insulating frame 45, the electric push rod 44 is arranged on the insulating frame 45, the clamping frame 41 is arranged at the ejection end of the electric push rod 44, the upper end of the clamping frame 41 is connected with the pressing clamp 42 in a sliding fit manner, the return spring 43 is connected between the clamping frame 41 and the pressing clamp 42, the return spring 43 plays a role in return, during specific work, when the pressing mechanism 37 at the outermost side of the placing frame 2 descends, the linkage frame 38 is driven to descend synchronously, when the pressing mechanism 37 at the outermost side of the placing frame 2 descends, at the moment, the food bag is pressed uniformly, and meanwhile, the descending linkage frame 38 drives the pressing clamp 42 to descend so as to clamp one end (front end or rear end) of the food bag with the clamping frame 41, at this time, the serial connection mechanism 46 forms a complete serial circuit, the powered electric push rods 44 drive the food bags in clamping to be pulled, the two electric push rods 44 on the two tensioning units 4 drive the front and rear ends of the food bags to be tensioned reversely, and the uniform distribution of the food inside the food bags is further ensured.

The extrusion unit 7 comprises an extrusion block 71 and rolling rollers 72, the extrusion block 71 is mounted at the ejection end of the lifting cylinder 6, the rolling rollers 72 are symmetrically arranged at the front end and the rear end of the extrusion block 71 through pin shafts, and the friction resistance between the rolling rollers 72 and the extrusion rod 35 is reduced.

The inner wall of the clamping frame 41 is evenly provided with clamping teeth, the clamping teeth are of a triangular structure, the lower end face of the pressing clamp 42 is evenly provided with clamping blocks, the clamping blocks and the clamping teeth are arranged in a vertically staggered mode, the clamping teeth and the clamping blocks play a clamping role for one end (the front end or the rear end) of the food bag, and the clamping degree is improved.

The series mechanism 46 include group battery 461, the wire 462, conducting block 463 and contact block 464, install group battery 461 on the insulating frame 45, press the outer end of anchor clamps 42 to install contact block 464, install conducting block 463 on the lateral wall of holding frame 41, and group battery 461, electric putter 44, connect in series through wire 462 between conducting block 463 and the contact block 464, be separation state between conducting block 463 and the contact block 464, during specific work, it descends to press anchor clamps 42 to descend and to the one end centre gripping (front end or rear end) of food bag with holding frame 41 through linkage frame 38 that descends, at this moment, conducting block 463 and contact block 464 contact, the series mechanism 46 forms complete series circuit.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.