CN215098702U - Improved sealing device - Google Patents

Abstract

The utility model discloses a modified closing device, which comprises a substrate, be equipped with the base on the base plate, sliding mechanism around being equipped with between base and the base plate, the left and right sides of base all is equipped with sack plastic mechanism, sack plastic mechanism includes mounting bracket, spacing subassembly and angle of insertion subassembly, spacing subassembly includes the pole setting, be equipped with baffle and lower baffle in the pole setting, it all is equipped with spacing edge with the outside of baffle down to go up the baffle, angle of insertion subassembly is including inserting the angle slider and inserting the scute, it is relative to insert the angle slider the mounting bracket horizontal slip, the inboard of inserting the scute is equipped with the plastic edge, it is located to insert the scute go up between baffle and the lower baffle, just the thickness of inserting the angle board is less than go up the interval between baffle and the lower baffle. The utility model has the advantages that: the utility model discloses an utilize sack plastic mechanism, improved the sack of wrapping bag quality of taking shape.

Description

Improved sealing device

Technical Field

The utility model relates to a equipment for packing, especially packagine machine's closing device.

Background

Among the traditional food packaging machine, go into the wrapping bag with food package after, directly adopt the sword seal device to seal the wrapping bag, and the sword seal device that adopts in the present food chartered plane is when sealing, and is direct through the opening closure of ironing board with the wrapping bag from top to bottom, and ironing board scalds the opening of wrapping bag about the closed back and seals, because the sack has great flexibility, such mode can cause to seal untiely, leads to the leakproofness not good to reduce the qualification rate of packing. Therefore, in the prior art, by adding the knife seal corner inserting component, the continuous end face corner inserting and sealing can be performed on the vertically sealed square bag, so that the whole packaging forming sealing efficiency is improved, the finished product packaging efficiency is further improved, and the sealing of the packaging bag after corner inserting is more attractive.

However, the existing corner inserting mechanism is too simple, two triangular plates positioned at the left side and the right side of the bag opening are basically used for inserting, and when corners are inserted, because the corners are not limited, the upper side and the lower side of a packaging bag after the corners are inserted are easy to be dislocated, so that the forming quality of the packaging opening is influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: it is an object of the present invention to provide a closure device that solves one or more of the problems of the prior art, and provides at least one useful alternative or creation.

The utility model provides a solution of its technical problem is: an improved sealing device comprises a base plate, wherein a base is arranged on the base plate, a front sliding mechanism and a rear sliding mechanism are arranged between the base plate and the base plate, bag opening shaping mechanisms are arranged on the left side and the right side of the base, and the two bag opening shaping mechanisms are in mirror symmetry with each other; the bag mouth shaping mechanism comprises an installation frame, a limiting assembly and an inserting angle assembly, and the limiting assembly and the inserting angle assembly are both installed on the installation frame; the limiting assembly comprises a vertical rod, an upper partition plate and a lower partition plate are arranged on the vertical rod, limiting edges are arranged on the outer sides of the upper partition plate and the lower partition plate, the upper partition plate and the lower partition plate are arranged at intervals, and the distance between the upper partition plate and the lower partition plate is adjustable; the angle inserting assembly comprises an angle inserting slider and an angle inserting plate, the angle inserting plate is fixedly connected with the angle inserting slider, the angle inserting slider is opposite to the mounting frame in a horizontal sliding mode, shaping edges are arranged on the inner side of the angle inserting plate, the angle inserting plate is located between the upper partition plate and the lower partition plate, and the thickness of the angle inserting plate is smaller than the distance between the upper partition plate and the lower partition plate.

The utility model has the advantages that: the utility model discloses an utilize sack plastic mechanism, improved the sack of wrapping bag quality of taking shape. During operation, the last baffle of two sack plastic mechanism's spacing subassembly is close to each other earlier with lower baffle, then all insert in the wrapping bag, the baffle struts the sack from top to bottom after that, four spacing edges that utilize two sets of upper and lower baffles strut the sack of wrapping bag for a standard rectangle, and strut the back sack and obtain abundant strutting, no fold has been gone up on the sack, the angle board of inserting of two sack plastic mechanism all moves to the inboard after that, move to the inboard in the outside from the sack, make the sack follow rectangle extrusion deformation for the organ form, and in the extruded time, the upper and lower baffle is close to each other, the removal of angle board is inserted in the cooperation, thereby make the shaping quality of sack better, upper and lower edge more aligns when sealing.

As a further improvement of the technical scheme, a left-right sliding mechanism is arranged between the bag mouth shaping mechanism and the base, and the sliding directions of the two bag mouth shaping mechanisms are opposite to each other. Through setting up horizontal slide mechanism, can be so that the wrapping bags of the different bores of sack plastic mechanism adaptation, application range is wider. When the width of the bag opening needing to be packaged is increased, the two bag opening shaping mechanisms are far away from each other, and when the width of the bag opening is reduced, the two bag opening shaping mechanisms are close to each other. Therefore, the same sliding mechanism can be utilized to realize the mutual approaching and the mutual keeping away of the sliding mechanism and has the advantages of simple structure, convenient control and good centering property.

As a further improvement of the above technical solution, the limiting assembly further includes an upper nut seat and a lower nut seat, the upper partition plate is fixedly connected with the upper nut seat, the lower partition plate is fixedly connected with the lower nut seat, and both the upper nut seat and the lower nut seat are slidably connected with the mounting frame; the vertical rod is a screw rod, the upper nut seat and the lower nut seat are in threaded connection with the vertical rod, the moving directions of the upper nut seat and the lower nut seat are opposite, the vertical rod is rotatably connected with the mounting frame, and a first driving mechanism is further arranged at one end of the vertical rod.

Go up the baffle and realize reciprocating through the nut seat with lower baffle, utilize screw-nut's structure, can be so that the removal of upper and lower baffle is more stable and smooth and easy, simultaneously, a actuating mechanism can adopt servo motor, utilizes servo motor cooperation screw-nut structure for the action of upper and lower baffle is rapider and accurate.

As a further improvement of the above technical scheme, the base plate is further provided with a clamping and conveying mechanism and a sealing mechanism, the clamping and conveying mechanism is located at the rear side of the bag mouth shaping mechanism, and the sealing mechanism is located at the left side or the right side of the clamping and conveying mechanism.

During packaging, after the packaging bag passes through the bag mouth shaping mechanism, the bag mouth is sent into the sealing mechanism by the clamping and conveying mechanism for heat sealing, and the packaging quality of the packaging bag is improved. After the bag mouth of the packaging bag is shaped, the common rectangular bag mouth is integrated into an organ shape, then the bag mouth is clamped stably by the clamping and conveying mechanism, the shape of the bag mouth is kept not to be deformed, then the bag mouth is sent to the sealing mechanism for heat sealing, and finally the heat-sealed bag mouth is kept with good quality.

As a further improvement of the above technical scheme, the clamping and conveying mechanism comprises a stand, an upper clamping and conveying assembly and a lower clamping and conveying assembly, wherein the upper clamping and conveying assembly and the lower clamping and conveying assembly are both connected with the stand in a vertically sliding manner, and the lower clamping and conveying assembly and the upper clamping and conveying assembly are vertically mirror-symmetrical; the upper pinch assembly comprises an endless belt which comprises straight pinch sections.

During the work, it is steady to utilize two to press from both sides the sack clamp of sending the subassembly with the wrapping bag, and the wrapping bag can remove along with circulation belt's rotation after that, keeps horizontal motion in addition when removing, prevents that the sack from the fold appearing at the in-process that removes, presss from both sides the end of sending the section and links up with heat-seal mechanism for the sack of wrapping bag can obtain the heat-seal.

As a further improvement of the above technical solution, the upper pinch assembly includes a driving wheel and a plurality of guide wheels, and the endless belt is wound between the driving wheel and all the guide wheels.

As a further improvement of the above technical solution, the upper pinch assembly and the lower pinch assembly are connected to the stand through a second driving mechanism, and the moving directions of the upper pinch assembly and the lower pinch assembly are opposite.

As a further improvement of the technical scheme, the sealing mechanism comprises an upper heat sealing wheel and a lower heat sealing wheel. Continuous packaging in the moving process can be realized by using the heat sealing wheel, so that the packaging efficiency is improved, and the packaging quality is ensured.

As a further improvement of the technical scheme, the stand is also provided with a positioning mechanism. Through increasing positioning mechanism, can be so that when the encapsulation, utilize positioning mechanism to carry on spacingly with the article in the wrapping bag, prevent that the article of wrapping bag from causing the influence to the wrapping bag when the encapsulation.

As a further improvement of the technical scheme, the positioning mechanism comprises an upper pressing plate, a left clamping plate, a right clamping plate and a mounting bottom plate, the mounting bottom plate is fixed on the vertical frame, the upper pressing plate is connected with the mounting bottom plate through a lifting cylinder, the left clamping plate is mounted on the upper pressing plate through a left clamping cylinder, and the right clamping plate is mounted on the upper pressing plate through a right clamping cylinder. The upper pressing plate and the left and right clamping plates are utilized to firmly clamp the articles without influencing the bag opening of the packaging bag.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a schematic perspective view of the sealing device of the present invention;

fig. 2 is another perspective view of the sealing device of the present invention;

fig. 3 is a schematic perspective view of the bag mouth shaping mechanism of the present invention;

fig. 4 is a schematic structural diagram of the limiting assembly of the present invention;

fig. 5 is a schematic structural view of the corner inserting assembly of the present invention;

fig. 6 is a schematic structural view of the pinch assembly of the present invention;

fig. 7 is a mechanism schematic diagram of the positioning mechanism of the present invention;

fig. 8A is a schematic view of a state that the bag mouth a is spread;

fig. 8B is a schematic view of the state after the shaping of the pocket mouth a.

In the figure, a base plate 10, a base 20, a front-rear slide mechanism 30, a left-right slide mechanism 40,

The bag mouth reshaping mechanism 100, a mounting frame 110, a limiting component 120, an upright rod 121, an upper partition plate 122, a lower partition plate 123, a limiting edge 124, an upper nut seat 125, a lower nut seat 126, an angle inserting component 130, an angle inserting slide block 131, an angle inserting plate 132, a reshaping edge 133, a first driving mechanism 140, a clamping mechanism 200, an upright frame 210, an upper clamping component 220, a lower clamping component 230, a driving wheel 221, a second driving mechanism 240, a positioning mechanism 250, an upper pressing plate 251, a left clamping plate 252, a right clamping plate 253, a mounting bottom plate 254, a lifting cylinder 255 and a sealing mechanism 300.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. The preferred embodiment of the present invention is shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution. Meanwhile, all technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.

Referring to fig. 1 to 7, an improved sealing device includes a substrate 10, a base 20 is disposed on the substrate 10, a front-back sliding mechanism 30 is disposed between the base 20 and the substrate 10, specifically, the front-back sliding mechanism 30 may be a driving structure in which a servo motor is matched with a lead screw nut, a servo motor is fixedly mounted on the substrate 10, an output end of the servo motor is in driving connection with the lead screw, the nut is fixedly connected with the base 20, and when the servo motor acts, the base 20 can be driven by the lead screw nut to move back and forth relative to the substrate 10.

The bag opening shaping mechanism is characterized in that bag opening shaping mechanisms 100 are arranged on the left side and the right side of the base 20, the two bag opening shaping mechanisms 100 are in mirror symmetry with each other from left to right, a left-right sliding mechanism 40 is arranged between the bag opening shaping mechanisms 100 and the base 20, and the sliding directions of the two bag opening shaping mechanisms 100 are opposite to each other. Specifically, the left-right sliding mechanism 40 is similar to the front-back sliding mechanism 30, and the left-right sliding mechanism 40 also uses a servo motor as a driving force, so that when the servo motor acts, the two bag mouth shaping mechanisms 100 can be close to or far away from each other.

The bag mouth shaping mechanism 100 comprises an installation frame 110, a limiting assembly 120 and an inserting angle assembly 130, the installation frame 100 is in driving connection with the left-right sliding mechanism 40, and the limiting assembly 120 and the inserting angle assembly 130 are both installed on the installation frame 110; the limiting assembly 120 comprises a vertical rod 121, the vertical rod 121 is a screw rod, the upper end and the lower end of the screw rod 121 are connected with the mounting frame 110 through a bearing, the upper end of the vertical rod 121 is connected with a first driving mechanism 140 in a driving manner, and the first driving mechanism can also be a servo motor. The limiting assembly 120 further includes an upper nut seat 125 and a lower nut seat 126 that are connected to the vertical rod 121 by a screw, the upper nut seat 125 and the lower nut seat 126 are both connected to the mounting frame 110 in a sliding manner, and the moving directions of the upper nut seat 125 and the lower nut seat 126 are opposite. The upright rod 121 is provided with an upper partition plate 122 and a lower partition plate 123, the upper partition plate 122 and the lower partition plate 123 are integrally in an inverted L shape, the outer sides of the upper partition plate 122 and the lower partition plate 123 are respectively provided with a limiting edge 124, the upper partition plate 122 is fixedly connected with an upper nut seat 125, the lower partition plate 123 is fixedly connected with a lower nut seat 126, and the upper partition plate 122 and the lower partition plate are arranged at intervals of 123. The mounting heights of the limiting assemblies 120 of the left and right groups of bag mouth shaping mechanisms 100 are the same, and the upper partition plates 122 and the lower partition plates 123 of the two groups correspond to each other.

The corner inserting assembly 130 includes a corner inserting slider 131 and a corner inserting plate 132, specifically, the corner inserting plate 132 is integrally L-shaped, a slide rail is disposed in the mounting bracket 110, and the corner inserting assembly 130 further includes a driving member of a servo motor, which drives the corner inserting slider 131 to slide left and right along the slide rail on the mounting bracket 110. The angle inserting plate 132 is fixedly connected with the angle inserting sliding block 131, a shaping edge 133 is arranged on the inner side of the angle inserting plate 132, the angle inserting plate 132 is located between the upper partition plate 122 and the lower partition plate 123, and the thickness of the angle inserting plate 132 is smaller than the distance between the upper partition plate 122 and the lower partition plate 123.

A supporting plate 150 is arranged between the two groups of bag mouth shaping mechanisms 100, and the installation height of the supporting plate 150 corresponds to the height of the upper and lower partition plates.

Referring to fig. 1 to 3, in the case of toasted bread, a bag containing toasted bread is introduced into the improved sealing apparatus, and is positioned between two pocket mouth shaping mechanisms 100, the bag is held by a tray 150, and a pocket mouth a of the bag is opened forward. At this time, the left-right sliding mechanism 40 drives the two groups of bag mouth shaping mechanisms 100 to approach each other first, so that the distance between the two groups of upper and lower partition plates is smaller than the width of the bag mouth of the packaging bag; then, the front-back sliding mechanism 30 drives the two sets of upper and lower partitions 122, 123 to be integrally inserted into the bag opening. Then the left-right sliding mechanism 40 drives the two groups of upper partition plates 122 and the two groups of lower partition plates 123 to slightly open outwards along the left-right direction, then the first driving mechanism 140 drives the two groups of upper partition plates 122 and the two groups of lower partition plates 123 to open along the up-down direction, referring to fig. 8A, the bag mouth a is opened into a rectangle, and the four limiting edges 124 of the two groups of upper partition plates 122 and the two groups of lower partition plates 123 jointly form four sides of the bag mouth a; then the corner inserting assembly 130 is operated, the corner inserting plate 132 is positioned at the middle position of the upper partition 122 and the lower partition 123, the corner inserting plate 132 is pressed from the outer side to the inner side of the pocket mouth a by the shaping edges 133, and the pocket mouth a is in a wind organ shape under the combined action of the four limiting edges 123 and the two shaping edges 133, as shown in fig. 8B. Meanwhile, in order to match with the deformation of the bag mouth a, the distance between the upper partition plate 122 and the lower partition plate 123 is narrowed, so that the shape of the bag mouth a is more neat, and the upper side and the lower side of the bag mouth a are more aligned.

The shaped bag opening a can be subjected to the next heat-sealing shaping.

The improved sealing device is further provided with a clamping and conveying mechanism 200 and a sealing mechanism 300 on the substrate 10, wherein the clamping and conveying mechanism 200 is located on the rear side of the bag mouth shaping mechanism 100, and the sealing mechanism 300 is located on the left side or the right side of the clamping and conveying mechanism 200. In this embodiment, the sealing mechanism 300 is located at the right side of the pinch mechanism 200.

Specifically, the pinch mechanism 200 includes an upright frame 210, an upper pinch assembly 220 and a lower pinch assembly 230, the upright frame 210 is fixed on the substrate 10, the upper pinch assembly 220 and the lower pinch assembly 230 are both connected with the upright frame 210 in a vertically sliding manner, and the lower pinch assembly 230 and the upper pinch assembly 220 are in mirror symmetry with each other; the upper pinch assembly 220 and the lower pinch assembly 230 are connected with the stand 210 through a second driving mechanism 240, and the moving directions of the upper pinch assembly 220 and the lower pinch assembly 230 are opposite.

Referring to fig. 6, the upper pinch assembly 220 includes a pinch seat 222, the pinch seat 222 is in a long strip shape, one end of the pinch seat 222 is provided with a clamping plate 223, a circulating motor 224 is fixed on the pinch seat 222, the circulating motor 224 is a servo motor, an output shaft of the circulating motor 224 is provided with a driving wheel 221, the pinch seat 222 is further provided with two guide wheels, the left end and the right end of the clamping plate 223 are also provided with the guide wheels, and a circulating belt (not shown in the figure) surrounds the driving wheel 221 and all the guide wheels. And the section of the endless belt on the clamping plate 223 is a pinch section which is straight because the pinch section is located at both ends of the clamping plate 223.

During work, after the bag mouth a is shaped, the second driving mechanism 240 drives the clamping and conveying assembly 220 and the lower clamping and conveying assembly 230 to be close to each other, so that the bag mouth a can be clamped by the upper clamping plate 223 and the lower clamping plate 223, after the bag mouth a is clamped, the circulating motor 224 acts, and the packaging bags are conveyed to the right side under the driving of the circulating belt. Because the clamping and conveying section is straight, the bag opening a and the circulating belt have larger contact area, and the clamping and conveying are stable and reliable.

In this embodiment, the sealing mechanism 300 includes an upper heat sealing wheel and a lower heat sealing wheel. The bag mouth a is fed into the sealing mechanism 330 by the clamping mechanism 200, and then the bag mouth a is subjected to heat sealing and shaping after passing through the upper and lower heat sealing wheels. Of course, since the toast is loaded at the rear of the package, and the pinch mechanism 200 holds the opening of the bag, i.e., the front of the package, a support plate (not shown) is provided on the base plate to support the toast so that the package can be smoothly moved in the left-right direction. And the packaging bag can smoothly slide on the supporting plate.

Referring to fig. 7, in a further preferred embodiment, a positioning mechanism 250 is further provided on the stand 210. The positioning mechanism 250 comprises an upper pressing plate 251, a left pressing plate 252, a right pressing plate 253 and an installation bottom plate 254, the installation bottom plate 254 is fixed on the stand 210, the upper pressing plate 251 and the installation bottom plate 254 are connected through a lifting cylinder 255, the left pressing plate 252 is installed on the upper pressing plate 251 through a left clamping cylinder, and the right pressing plate 253 is installed on the upper pressing plate 251 through a right clamping cylinder.

In the case of a packaged toast bread, the toast bread is square and upright. In order to prevent the toasted bread from shaking in the packaging bag during sealing, a positioning mechanism 250 is added in the embodiment, when the toasted bread is in place, an upper pressure plate 251 is pressed downwards, then a left clamping plate 252 and a right clamping plate 253 are pressed inwards, and the toasted bread is firmly limited under the combined action of the supporting plate 150. No shaking occurs.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims (10)

1. An improved sealing device comprises a substrate, and is characterized in that: the base plate is provided with a base, a front sliding mechanism and a rear sliding mechanism are arranged between the base and the base plate, bag opening shaping mechanisms are arranged on the left side and the right side of the base, and the two bag opening shaping mechanisms are in mirror symmetry with each other; the bag mouth shaping mechanism comprises an installation frame, a limiting assembly and an inserting angle assembly, and the limiting assembly and the inserting angle assembly are both installed on the installation frame; the limiting assembly comprises a vertical rod, an upper partition plate and a lower partition plate are arranged on the vertical rod, limiting edges are arranged on the outer sides of the upper partition plate and the lower partition plate, the upper partition plate and the lower partition plate are arranged at intervals, and the distance between the upper partition plate and the lower partition plate is adjustable; the angle inserting assembly comprises an angle inserting slider and an angle inserting plate, the angle inserting plate is fixedly connected with the angle inserting slider, the angle inserting slider is opposite to the mounting frame in a horizontal sliding mode, shaping edges are arranged on the inner side of the angle inserting plate, the angle inserting plate is located between the upper partition plate and the lower partition plate, and the thickness of the angle inserting plate is smaller than the distance between the upper partition plate and the lower partition plate.

2. The improved closure of claim 1, wherein: the bag mouth shaping mechanism and the base are provided with a left-right sliding mechanism, and the sliding directions of the two bag mouth shaping mechanisms are opposite to each other.

3. The improved closure of claim 1, wherein: the limiting assembly further comprises an upper nut seat and a lower nut seat, the upper partition plate is fixedly connected with the upper nut seat, the lower partition plate is fixedly connected with the lower nut seat, and the upper nut seat and the lower nut seat are both in sliding connection with the mounting frame; the vertical rod is a screw rod, the upper nut seat and the lower nut seat are in threaded connection with the vertical rod, the moving directions of the upper nut seat and the lower nut seat are opposite, the vertical rod is rotatably connected with the mounting frame, and a first driving mechanism is further arranged at one end of the vertical rod.

4. The improved closure of claim 1, wherein: the bag mouth shaping mechanism is characterized in that a clamping and conveying mechanism and a sealing mechanism are further arranged on the base plate, the clamping and conveying mechanism is located on the rear side of the bag mouth shaping mechanism, and the sealing mechanism is located on the left side or the right side of the clamping and conveying mechanism.

5. The improved closure of claim 4, wherein: the clamping and conveying mechanism comprises a vertical frame, an upper clamping and conveying assembly and a lower clamping and conveying assembly, the upper clamping and conveying assembly and the lower clamping and conveying assembly are connected with the vertical frame in a vertical sliding mode, and the lower clamping and conveying assembly and the upper clamping and conveying assembly are in vertical mirror symmetry; the upper pinch assembly comprises an endless belt which comprises straight pinch sections.

6. The improved closure of claim 5, wherein: the upper pinch assembly comprises a driving wheel and a plurality of guide wheels, and the circulating belt is wound between the driving wheel and all the guide wheels.

7. The improved closure of claim 5, wherein: the upper pinch assembly and the lower pinch assembly are connected with the vertical frame through a second driving mechanism, and the moving directions of the upper pinch assembly and the lower pinch assembly are opposite.

8. The improved closure of claim 5, wherein: the sealing mechanism comprises an upper heat sealing wheel and a lower heat sealing wheel.

9. The improved closure of claim 5, wherein: and the vertical frame is also provided with a positioning mechanism.

10. The improved closure of claim 9, wherein: the positioning mechanism comprises an upper pressing plate, a left clamping plate, a right clamping plate and a mounting bottom plate, the mounting bottom plate is fixed on the vertical frame, the upper pressing plate is connected with the mounting bottom plate through a lifting cylinder, the left clamping plate is installed on the upper pressing plate through a left clamping cylinder, and the right clamping plate is installed on the upper pressing plate through a right clamping cylinder.

Images