CN114476167A - Sealing device - Google Patents

Abstract

The application relates to the technical field of packaging, and the embodiment of the application provides a sealing device. This closing device includes conveyer belt, locating component and heat-seal machine and constructs at least, and locating component includes two screw rods, through the location clearance that forms between two screw rods for waiting on the conveyer belt that the sealing piece can follow locating component's rotation and carry, so, can carry out the heat-seal operation through heat-seal machine structure in the transportation process continuously, realize continuous transport and continuous heat-seal and wait the process of sealing piece, improved and sealed the operating efficiency.

Description

Sealing device

Technical Field

The application relates to the technical field of packaging, in particular to a sealing device.

Background

In the related art, a sealing member to be sealed is generally conveyed to a sealing station, and then conveyed to a next station after heat sealing. In this process, the sealing efficiency needs to be improved.

Disclosure of Invention

Accordingly, there is a need for a sealing device to improve the sealing efficiency.

The embodiment of the application provides a closing device, includes:

the conveying belt is used for bearing and conveying the piece to be sealed along a first direction;

the positioning assembly comprises two screws which extend along the first direction and are respectively arranged on two sides of the conveying belt, and each screw is provided with a plurality of spiral grooves which extend side by side in a spiral shape along the first direction; the two screws rotate in different directions and have the same rotating speed, so that a positioning gap for positioning the to-be-sealed piece is formed between the screw grooves corresponding to the two screws, and the to-be-sealed piece moves forwards on the conveying belt in sequence; and

and the heat sealing mechanism is used for grabbing a sealing film and thermally sealing the sealing film on the conveying belt at the opening of the piece to be sealed.

In one embodiment, each screw comprises an introduction section, a separation section and a film sealing section which are sequentially arranged along the first direction;

the thread pitches of the plurality of threads of the separation section are larger than those of the plurality of threads of the leading-in section and smaller than those of the plurality of threads of the film sealing section, so that the movement speed of the to-be-sealed piece located at the leading-in section along the first direction is smaller than the conveying speed of the conveying belt, and the movement speed of the to-be-sealed piece located at the film sealing section along the first direction is consistent with the conveying speed of the conveying belt.

In one embodiment, the pitch of the plurality of flights of the separation section increases in a first manner in the first direction, so that the speed of movement of the piece to be sealed moving into the separation section in the first direction gradually increases to coincide with the transport speed of the conveyor belt as it moves out of the separation section.

In one embodiment, the plurality of screw grooves of the lead-in section have the same screw pitch; and/or

The screw grooves of the film sealing section have the same screw pitch.

In one embodiment, the pitch of the plurality of flights of the separation section increases linearly in the first direction with a first law.

In one embodiment, the heat sealing mechanism comprises a plurality of heat sealing heads spaced apart in the first direction;

the heat sealing heads are in one-to-one correspondence with positioning gaps which are positioned on the film sealing section and used for positioning the piece to be sealed.

In one embodiment, the heat sealing mechanism comprises an electromagnetic induction sealer.

In one embodiment, the sealing device further comprises a film feeding mechanism, a film receiving mechanism and a shearing mechanism;

the film feeding mechanism is used for conveying a sealing film to the shearing mechanism, the film collecting mechanism is used for rolling the sealing film output by the shearing mechanism, and the shearing mechanism is used for shearing the sealing film matched with the opening of the piece to be sealed;

the heat sealing mechanism is used for transferring the sealing film formed by shearing of the shearing mechanism, and the sealing film formed by shearing is heat-sealed on the mouth part of the piece to be sealed on the conveying belt.

In one embodiment, the sealing device further comprises a film pulling mechanism;

the film pulling mechanism is positioned on a conveying path of the sealing film to tension the sealing film.

In one embodiment, the closure device further comprises a controller;

the heat sealing mechanism, the film feeding mechanism, the film receiving mechanism and the shearing mechanism are respectively electrically connected with the controller.

Among the above-mentioned closing device, closing device includes the conveyer belt at least, locating component and heat-seal machine construct, and locating component includes two screw rods, through the location clearance that forms between two screw rods for waiting on the conveyer belt that the sealing piece can follow locating component's rotation and carry, so, can carry out the heat-seal operation through heat-seal machine structure in the continuous transport, realize continuous transport and the process that the sealing piece was waited in the continuous heat-seal, improved the operating efficiency that seals.

Additional aspects and advantages of embodiments of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the present application.

Drawings

FIG. 1 is a schematic structural diagram of a sealing device according to an embodiment of the present disclosure;

FIG. 2 is a schematic top view of the structure of FIG. 1 in an embodiment of the present application;

FIG. 3 is a schematic perspective view of a positioning assembly engaged with a conveyor belt according to an embodiment of the disclosure;

FIG. 4 is a schematic side view of the embodiment of the present application shown in FIG. 3;

FIG. 5 is a schematic structural diagram of a positioning assembly according to an embodiment of the present disclosure;

notation of elements for simplicity:

a piece to be sealed 10, a mouth part 11 and a sealing film 20;

a conveyor belt 100;

the device comprises a positioning component 200, a screw 210, a screw groove 211, a leading-in section a, a separation section b and a film sealing section c;

a heat sealing mechanism 300, a heat seal head 310;

a film feeding mechanism 400;

a film collecting mechanism 500;

a shearing mechanism 600;

a film drawing mechanism 700;

a controller 800;

a first direction x.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the present application. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. The embodiments of this application can be implemented in many different ways than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the invention and therefore the embodiments of this application are not limited to the specific embodiments disclosed below.

It is to be understood that the terms "first," "second," and the like as used herein may be used herein to describe various terms of art, and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features being indicated. These terms are not intended to be limiting unless specifically stated otherwise. These terms are only used to distinguish one term from another. In the description of the embodiments of the present application, "a plurality" or "a plurality" means at least two, e.g., two, three, etc., unless specifically defined otherwise.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely below the second feature, or may simply mean that the first feature is at a lesser level than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

As background art, in the related art, in order to realize a stable heat sealing process, a sealing member to be sealed is generally conveyed to a sealing station, and then the sealing member obtained after the heat sealing is completed is conveyed to a next station. That is, in order to keep the sealing member stable, the sealing member is conveyed intermittently. For example, the feeding and discharging of the piece to be sealed are realized by the pushing of the air cylinder. So, because the transport and the heat-seal of treating the sealing member divide into different stations and operate, when carrying out the heat-seal, need stop the line with the production line, and the feeding when the heat-seal is discontinuous, lead to the heat-seal action also not coherent, and then lead to sealing efficiency and production efficiency not high.

Based on this, the embodiment of the application improves the feeding mode of the piece to be sealed to complete the heat sealing on the conveying path of the piece to be sealed, thereby avoiding some of the problems noted above. The closing device provided by the embodiments of the present application will be described below with reference to the related descriptions of some embodiments.

FIG. 1 is a schematic diagram of a sealing device according to an embodiment of the present disclosure; FIG. 2 shows a schematic top view of the structure of FIG. 1 in an embodiment of the present application; for convenience of illustration, only the parts related to the embodiments of the present application are shown, for example, in fig. 2, the parts of the positioning assembly 200 and the like are shown for convenience of illustration, and the heat sealing mechanism 300 is omitted.

Referring to fig. 1 and 2, the present application provides a sealing device, which includes a conveying belt 100, a positioning assembly 200, and a heat sealing mechanism 300. The conveyor belt 100 is used to carry and convey the members to be sealed 10 in a first direction x. The first direction x is a conveying direction in which the conveyor 100 conveys the sealing member 10. The positioning assembly 200 includes two screws 210 extending along the first direction x and separated from two sides of the conveying belt 100, each screw 210 is provided with a plurality of screw grooves 211 extending spirally and side by side along the first direction x, and the two screws 210 rotate in opposite directions and have the same rotation speed, so as to form a positioning gap for positioning the to-be-sealed piece 10 between the screw grooves 211 corresponding to the two screws 210, thereby sequentially moving the to-be-sealed piece 10 forward on the conveying belt 100. The heat sealing mechanism 300 is used for grabbing the sealing film 20 and heat sealing the sealing film 20 to the mouth 11 of the member to be sealed 10 on the conveying belt 100.

Taking fig. 2 as an example, the rotation direction of the screw 210 on the left side is right, and the rotation direction of the screw 210 on the right side is left, so that the sealing member 10 can be moved forward on the conveyor belt 100 in the first direction x. In some embodiments, the shape of the groove 211 of each screw 210 may be configured to conform to the outer contour of the article to be sealed 10. For example, when the member to be sealed 10 is a cylindrical structure, the spiral groove 211 may have a structure whose radian matches the profile of the cylindrical structure, and a positioning gap formed between the spiral grooves 211 corresponding to the two screws 210 may also surround the member to be sealed 10. It is understood that the positioning gap formed between the two screws 210 is also formed along the first direction x, and for the same sealing member 10, when the conveying belt 100 conveys the sealing member 10, the sealing member 10 moves forward from the next positioning gap to the previous positioning gap along with the rotation of the two screws 210, and the positioning assembly 200 can realize the conveying of the sealing member 10 together with the conveying belt 100, and make the sealing member 10 more stable during the conveying process due to the positioning gap. It should be noted that the following positioning gap and the preceding positioning gap mean that, in the first direction x, the following positioning gap is located upstream of the preceding positioning gap. The two screws 210 have the same rotating speed, so that the two screws 210 can move synchronously to form the positioning gap. Due to the positioning assembly 200, the sealing member 10 can be continuously and stably fed, and the heat sealing mechanism 300 can perform synchronous heat sealing conveniently.

Therefore, the sealing member 10 on the conveying belt 100 can be conveyed along with the rotation of the positioning assembly 200 during the conveying process through the positioning gap formed between the two screws 210, and the sealing member 10 located between the two screws 210 can have a relatively stable state. Therefore, the heat sealing operation can be carried out through the heat sealing mechanism 300 while the continuous conveying is carried out, the processes of continuous conveying and continuous heat sealing of the to-be-sealed piece 10 are realized, and the sealing operation efficiency and the production efficiency are improved.

Fig. 3 is a schematic perspective view illustrating the positioning assembly 200 and the conveying belt 100 according to an embodiment of the present disclosure; FIG. 4 is a schematic side view of the embodiment of the present application shown in FIG. 3; FIG. 5 is a schematic structural diagram of a positioning assembly 200 according to an embodiment of the present application; for convenience of explanation, only portions related to the embodiments of the present application are shown.

In order to obtain better sealing effect, in some embodiments, referring to fig. 3 to fig. 5 in combination with fig. 2, each screw 210 includes an introduction section a, a separation section b, and a sealing section c sequentially arranged along the first direction x. The pitch of the plurality of screw grooves 211 of the separating section b is greater than the pitch of the plurality of screw grooves 211 of the introducing section a and is less than the pitch of the plurality of screw grooves 211 of the film sealing section c, so that the moving speed of the to-be-sealed piece 10 positioned at the introducing section a along the first direction x is less than the conveying speed of the conveying belt 100, and the moving speed of the to-be-sealed piece 10 positioned at the film sealing section c along the first direction x is consistent with the conveying speed of the conveying belt 100.

It should be noted that the moving speed of the to-be-sealed piece 10 located at the introduction section a along the first direction x is less than the conveying speed of the conveying belt 100, the introduction sections a of the two screws 210 can block the to-be-sealed piece 10 from moving forward in the first direction x, and the to-be-sealed piece 10 located at the introduction section a can have a relatively stable state through the positioning gap located at the introduction section a, and in this process, the to-be-sealed piece 10 can be successively and smoothly introduced between the two screws 210, so as to facilitate subsequent actions. In one embodiment, the introduction section a may be sized to have a plurality of pitches so that the sealing members 10 are advanced one after the other. The moving speed of the to-be-sealed piece 10 entering the separating section b from the leading-in section a along the first direction x is smaller than the conveying speed of the conveying belt 100, and the moving speed of the to-be-sealed piece 10 entering the film sealing section c from the separating section b along the first direction x is consistent with the conveying speed of the conveying belt 100. That is, during the advancing of the piece to be sealed 10 in the separation section b, the speed of movement of the piece to be sealed 10 in the first direction x is increased. Since the pitch of the plurality of screw grooves 211 of the separation section b is greater than the pitch of the plurality of screw grooves 211 of the introduction section a, the distance between the respective members to be sealed 10 of the separation section b becomes larger with respect to the distance between the respective members to be sealed 10 of the introduction section a, and separation between the respective members to be sealed 10 is achieved. When the to-be-sealed piece 10 moves forward to the film sealing sections c of the two screws 210, the moving speed of the to-be-sealed piece 10 located at the film sealing section c along the first direction x is consistent with the conveying speed of the conveying belt 100, and the film sealing sections c of the two screws 210 can be synchronously conveyed with the conveying belt 100 along the first direction x to realize stable conveying of the to-be-sealed piece 10. Because the thread pitch of the plurality of threads 211 of the separation section b is smaller than the thread pitch of the plurality of threads 211 of the film sealing section c, the distance between the pieces to be sealed 10 at the film sealing section c can present a certain interval, which is convenient for the heat sealing mechanism 300 to perform the heat sealing operation at the film sealing section c.

Thus, by arranging the introducing section a, the separating section b and the film sealing section c on the two screws 210 in the positioning assembly 200 along the first direction x, the processes of introducing, separating and sealing the film of each piece to be sealed 10 are realized. In the conveying process, the two screws 210 are always in continuous line contact with the piece to be sealed 10, so that continuity and reliability in the conveying process are guaranteed, and the heat sealing mechanism 300 can perform heat sealing operation conveniently.

In some embodiments, with continued reference to fig. 5 in conjunction with fig. 3 and 4, the pitch of the plurality of flights 211 of the separating section b increases in a first direction x in a first regular manner, so that the speed of movement of the piece to be sealed 10 moving into the separating section b in the first direction x gradually increases to coincide with the conveying speed of the conveyor belt 100 when moving out of the separating section b. That is, as the two screws 210 rotate, the distance between the members to be sealed 10 is dynamically and gradually lengthened, so that the process of stably conveying the members to be sealed 10 between the separation sections b can be further achieved. In other embodiments, the plurality of screw grooves 211 of the introduction section a may also have the same screw pitch, so that the movement speed of the to-be-sealed member 10 entering the introduction section a along the first direction x is less than the conveying speed of the conveying belt 100, thereby achieving a stable introduction process. Of course, in other embodiments, the plurality of screw grooves 211 of the film sealing section c may have the same screw pitch, so that the sealing members 10 entering the film sealing section c are kept at the pull-off interval along the first direction x and advance at the same movement speed as the conveying speed of the conveying belt 100, thereby facilitating the heat sealing operation of the heat sealing mechanism 300.

It should be noted that the first rule may be that the thread pitches of the plurality of thread grooves 211 are in an arithmetic progression, an geometric progression, or the like, so that the moving speed of the to-be-sealed piece 10 entering the separation section b along the first direction x is gradually increased, which is not specifically limited in this embodiment of the application. In some embodiments, the pitch of the plurality of screw grooves 211 of the separating section b may increase linearly in the first direction x according to a first law, so that the speed of movement of the piece to be sealed 10 entering the separating section b in the first direction x has a linear increasing course. In this way, a more stable transport state is further obtained in the separation section b.

In some embodiments, the heat sealing mechanism 300 includes a plurality of heat seals 310 spaced apart along the first direction x. The plurality of heat seal heads 310 correspond one-to-one to positioning gaps provided in the film sealing section c for positioning the member to be sealed 10. That is to say, the thread pitches of the plurality of screw grooves 211 of the film sealing section c can be set according to the distance between the heat sealing heads 310, so that the heat sealing mechanism 300 can realize multi-head sealing on the film sealing section c, and the sealing efficiency is further improved.

To further enhance the heat-sealing efficiency, in some embodiments, the heat-sealing mechanism 300 comprises an electromagnetic induction sealer. For example, in the sealing operation using an aluminum foil, a magnetic field may be generated by energizing an induction coil, a magnetic field eddy current may be formed on the surface of the aluminum foil, and heat may be instantaneously generated on the surface of the aluminum foil, thereby completing the process of heat-sealing the aluminum foil to the mouth portion 11 of the member to be sealed 10. Compared with a resistance heating mode, the heating efficiency of electromagnetic induction is higher, the sealing welding time can be shortened, the sealing film 20 can be heated in a shorter time, the sealing operation is completed, and the heat sealing efficiency is improved. It should be noted that, the related structure of the electromagnetic induction sealing machine is the prior art, and is not the key point to be protected in the embodiments of the present application, and the detailed description of the specific structure and the working principle of the electromagnetic induction sealing machine is not repeated here.

In some embodiments, with continued reference to fig. 1 and 2, the sealing apparatus further includes a film feeding mechanism 400, a film collecting mechanism 500, and a cutting mechanism 600. The film feeding mechanism 400 is used for conveying the sealing film 20 to the cutting mechanism 600, the film collecting mechanism 500 is used for winding the sealing film 20 output by the cutting mechanism 600, and the cutting mechanism 600 is used for cutting and forming the sealing film 20 matched with the mouth part 11 of the piece to be sealed 10. The heat sealing mechanism 300 is used for transferring the sealing film 20 cut by the cutting mechanism 600, and the sealing film 20 formed by the cutting is heat sealed to the mouth 11 of the member to be sealed 10 on the conveyor belt 100. Therefore, the feeding and discharging process of the sealing film 20 can be realized, and the continuity of the sealing operation can be realized. It should be noted that the related structure of the shearing mechanism 600 is the prior art, and is not the important point to be protected in the embodiments of the present application, and the detailed structure and the working principle of the shearing mechanism 600 are not described herein again.

In some embodiments, with continued reference to fig. 1 and 2, the sealing device further includes a film pulling mechanism 700. The film pulling mechanism 700 is located on the conveying path of the sealing film 20 to tension the sealing film 20. Thus, the cutting mechanism 600 can cut and form the sealing film 20 matched with the mouth part 11 of the sealing member 10 conveniently, and the sealing film 20 with good molding appearance is obtained. In particular, in other embodiments, the sealing device further comprises a controller 800. The heat sealing mechanism 300, the film feeding mechanism 400, the film collecting mechanism 500 and the cutting mechanism 600 are respectively electrically connected to the controller 800. That is, the controller 800 can determine the die cutting length and the film drawing length, and ensure that the film drawing length is in the size each time, so that the film sealing 20 can be saved, and the utilization rate of the film sealing 20 can be improved. The film feeding mechanism 400 rotates and releases the film by being driven by a length set by the controller 800. The film drawing mechanism 700 drives the rotary film drawing mechanism to draw the film in accordance with the length set by the controller 800. The shearing mechanism 600 instantaneously starts shearing the sealing film 20 under the instruction of the controller 800. The film collecting mechanism 500 collects the leftover materials left after cutting. As an embodiment, the Controller 800 may be intelligently controlled using a PLC (Programmable Logic Controller) program. It should be noted that the number of the shearing mechanisms 600 may be set according to the number of the heat sealing heads 310 of the heat sealing mechanism 300, for example, the number of the shearing mechanisms 600 is not less than the number of the heat sealing heads 310 of the heat sealing mechanism 300, so that the heat sealing efficiency can be improved.

The operation of the sealing device according to the embodiment of the present invention will be described with reference to fig. 1 to 5.

Referring to fig. 1 to 5, firstly, the sealing film 20 is installed on the reel of the film feeding mechanism 400, and the sealing film 20 passes through the film pulling mechanism 700 and the cutting mechanism 600, and finally is wound on the film collecting mechanism 500. Next, the conveyor belt 100 is activated to convey the object 10, and the two screws 210 in the positioning assembly 200 are simultaneously rotated to convey the object 10 together with the conveyor belt 100. Each piece to be sealed 10 sequentially enters the leading-in section a, the separating section b and the film sealing section c in the two screws 210, so that the leading-in and the separation of each piece to be sealed 10 between the two screws 210 are realized, and the piece to be sealed is kept on the film sealing section c according to the pulled-out interval and advances at the same speed. At the same time, the picking mechanism cuts the seal film 20 passing through. After the sealing film 20 is cut, the controller 800 controls the operation of the heat-sealing mechanism 300. The heat sealing mechanism 300 grabs the sealing film 20 formed by cutting by the cutting mechanism 600, moves to the position above the to-be-sealed piece 10 on the sealing film section c, aligns to the mouth part 11 of the to-be-sealed piece 10 and performs positive pressure, the positive pressure triggers the power switch after reaching a set position, the induction coil generates magnetic field eddy current after being electrified, so that the sealing film 20 above the to-be-sealed piece 10 generates heat under the action of the magnetic field eddy current, and the sealing film 20 is melted on the mouth part 11 of the to-be-sealed piece 10 under the positive pressure of the heat sealing mechanism 300. After the sealing is completed, the heat sealing mechanism 300 returns to the origin to wait for the next operation by the command of the controller 800. After the sealing film 20 at the cutting mechanism 600 is grabbed, the controller 800 controls the motor on the film feeding mechanism 400 to rotate, the rolled film is conveyed, then the film pulling mechanism 700 pulls the film according to the set length, and finally, the film collecting mechanism 500 recovers the rolled film pulled by the film pulling mechanism 700.

In summary, in the sealing device provided in the embodiment of the present application, a continuous and stable feeding process is realized by providing the positioning assembly 200 including the two screws 210, so that the conveying line of the mouth portion 11 of the to-be-sealed member 10 does not stop during the heat sealing. The electromagnetic induction mode is used for sealing while continuous and stable conveying is carried out, the heat-sealing welding time is shortened, and the working efficiency of the whole device is further improved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A closure device, comprising:

the conveying belt is used for bearing and conveying the piece to be sealed along a first direction;

the positioning assembly comprises two screws which extend along the first direction and are respectively arranged on two sides of the conveying belt, and each screw is provided with a plurality of spiral grooves which extend side by side in a spiral shape along the first direction; the two screws rotate in different directions and have the same rotating speed, so that a positioning gap for positioning the to-be-sealed piece is formed between the screw grooves corresponding to the two screws, and the to-be-sealed piece moves forwards on the conveying belt in sequence; and

and the heat sealing mechanism is used for grabbing a sealing film and thermally sealing the sealing film on the conveying belt at the opening of the piece to be sealed.

2. The sealing device of claim 1, wherein each of the screws includes an introduction section, a separation section, and a sealing section, which are sequentially arranged in the first direction;

the thread pitches of the plurality of threads of the separation section are larger than those of the plurality of threads of the leading-in section and smaller than those of the plurality of threads of the film sealing section, so that the movement speed of the to-be-sealed piece located at the leading-in section along the first direction is smaller than the conveying speed of the conveying belt, and the movement speed of the to-be-sealed piece located at the film sealing section along the first direction is consistent with the conveying speed of the conveying belt.

3. The seal of claim 2 wherein the pitch of the plurality of flights of the singulating section increases in a first sense in the first direction to progressively increase the speed of movement of the member to be sealed moving into the singulating section in the first direction to coincide with the speed of transport of the conveyor belt as it moves out of the singulating section.

4. The seal of claim 3 wherein a plurality of said flutes of said lead-in section have the same pitch; and/or

The screw grooves of the film sealing section have the same screw pitch.

5. The seal of claim 3 wherein the pitch of the plurality of flights of the separator section increases linearly in the first direction with a first law.

6. The sealing device of any of claims 2-5, wherein said heat sealing mechanism comprises a plurality of heat seals spaced apart along said first direction;

the heat sealing heads are in one-to-one correspondence with positioning gaps which are positioned on the film sealing section and used for positioning the piece to be sealed.

7. The sealing device of any of claims 1-5, wherein the heat sealing mechanism comprises an electromagnetic induction sealer.

8. The sealing device of any one of claims 1 to 5, further comprising a film feeding mechanism, a film collecting mechanism, and a shearing mechanism;

the film feeding mechanism is used for conveying a sealing film to the shearing mechanism, the film collecting mechanism is used for rolling the sealing film output by the shearing mechanism, and the shearing mechanism is used for shearing the sealing film matched with the opening of the piece to be sealed;

the heat sealing mechanism is used for transferring the sealing film formed by shearing of the shearing mechanism, and the sealing film formed by shearing is heat-sealed on the mouth part of the piece to be sealed on the conveying belt.

9. The closure of claim 8, further comprising a film pulling mechanism;

the film pulling mechanism is positioned on a conveying path of the sealing film to tension the sealing film.

10. The closure of claim 8, further comprising a controller;

the heat sealing mechanism, the film feeding mechanism, the film receiving mechanism and the shearing mechanism are respectively electrically connected with the controller.

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