Plastic film sealing machine

Abstract

The utility model relates to the technical field of sealing, and discloses a plastic film sealing machine which comprises a rectangular frame, an air cylinder, a rectangular plate, a first heat sealing plate, a rotating shaft, a gear, a first rack and a second rack. During use, the cylinders on the two sides are controlled to work, so that the rectangular plates on the two sides can be driven to move. And the hot pressing plates on the two sides are close to or far away from each other, so that the sealing action is completed. Meanwhile, when the rectangular plate on any side moves, the racks on the two sides connected with the rectangular plate can be driven to move. The gears on the two sides can be driven to rotate through the meshing effect between the teeth. And the racks on the other two sides can be driven to move in the direction through the inter-tooth meshing effect again. And then the rectangular plate on the other side is driven to move reversely. And finally, the function that the hot pressing plates on the two sides synchronously move in the opposite direction or the reverse direction is achieved, and the sealing effect is improved. Moreover, when the air cylinder on any side stops working for some reason, the heat sealing plates on the two sides can still synchronously move in the opposite direction or the reverse direction, and it is guaranteed that sealing work is conducted smoothly.

Description

Technical Field

[0001] This application relates to the field of sealing technology, for example to a plastic film sealing machine. Background Technology

[0002] A novel plastic film sealing mechanism is disclosed in related technology (Announcement No.: CN218537313U), comprising two sets of heat-sealing mechanisms arranged opposite each other. Each set of heat-sealing mechanisms includes a drive cylinder, a cylinder base plate, a heat-sealing base plate, and a heat-sealing plate. The cylinder body end of the drive cylinder is mounted at the center of the cylinder base plate, and the piston rod of the drive cylinder passes through the center of the cylinder base plate. The center of the heat-sealing base plate is connected to the end of the piston rod of the drive cylinder. The heat-sealing plate is mounted on the heat-sealing base plate, and each set of heat-sealing plates has sealing teeth on its outer end face, with the sealing teeth on the two heat-sealing plates meshing with each other. The heat-sealing plates of the two sets of heat-sealing mechanisms are arranged opposite each other, and the two cylinder base plates are fixedly connected by a connecting rod.

[0003] In implementing the above embodiments, at least the following problems were found in the related technology:

[0004] This plastic film sealing mechanism uses two cylinders to move two heat-sealing plates in opposite directions. Compared to a single heat-sealing plate, this allows both sides of the plastic film to be heated simultaneously, improving sealing quality. However, due to factors such as gas compressibility and friction, synchronizing the two cylinders is very difficult. Therefore, it is difficult for the two heat-sealing plates to heat both sides of the plastic film simultaneously. Furthermore, if one of the cylinders stops working for any reason, the sealing process will not be successful.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a plastic film sealing machine to solve the problems mentioned in the background art.

[0008] In some embodiments, the plastic film sealing machine includes: a rectangular frame; cylinders, respectively mounted on opposite side walls of the rectangular frame along its length and located at the middle position of the rectangular frame along its width, with the moving ends of the cylinders on both sides distributed opposite to each other; rectangular plates, respectively mounted on the moving ends of the cylinders on both sides, with the planes of the rectangular plates on both sides parallel to each other; first heat-sealing plates, respectively mounted between opposite faces of the rectangular plates on both sides; and rotating shafts, rotatably mounted on opposite sides of the rectangular frame along its width. A wall, located at the middle of the rectangular frame along its length, with the two rotating shafts on either side opposite each other; gears, respectively mounted on opposite ends of the two rotating shafts; a first rack, mounted on one side of the rectangular plate along its length and meshing with the gears on both sides; a second rack, mounted on the other side of the rectangular plate along its length and meshing with the gears on both sides, the second racks on both sides being centrally symmetrical with the first racks on both sides; wherein, driven by the cylinders on both sides, the first heat-sealing plates on both sides abut against each other.

[0009] Optionally, it also includes: support rods, which are respectively installed between the rectangular plates on both sides and the first heat-sealing plates on both sides.

[0010] Optionally, it also includes: a heat-sealing base plate, which is respectively installed between the two side support rods and the two side first heat-sealing plates.

[0011] Optionally, it further includes: a second heat-sealing plate, which is respectively installed on the heat-sealing base plates on both sides, and the second heat-sealing plates on both sides are located below the first heat-sealing plates on both sides along the height direction of the rectangular frame; and a cutter, which is respectively installed on the heat-sealing base plates on both sides, and the cutter on both sides is located between the first heat-sealing plates on both sides and the second heat-sealing plates on both sides along the height direction of the rectangular frame.

[0012] Optionally, it further includes: an optical axis, which is slidably disposed through the rectangular plates on both sides along the length direction of the rectangular frame and located on both sides of the rectangular frame along the width direction of the rectangular frame, with the optical axis on both sides being installed on the inner wall of the rectangular frame.

[0013] Optionally, it also includes: metal bushings, which are respectively fitted onto the optical axes on both sides and respectively mounted on the rectangular plates on both sides.

[0014] Optionally, it further includes: bearing housings, mounted on the rectangular frame and respectively fitted onto the two rotating shafts on both sides; bearings, respectively mounted between the bearing housings on both sides and the rotating shafts on both sides.

[0015] Optionally, it further includes: sealing caps, respectively installed at both ends of each side of the bearing housing, wherein each sealing cap at both ends of each side abuts against the bearing on the same side.

[0016] Optionally, it further includes: a retaining ring, which is respectively fitted onto the two sides of the rotating shaft, both sides of the rotating shaft include a shoulder, and the bearing on each side is located between the shoulder and the retaining ring on the same side.

[0017] The plastic film sealing machine provided in this disclosure can achieve the following technical effects:

[0018] This disclosure provides a plastic film sealing machine, comprising a rectangular frame, cylinders, rectangular plates, a first heat-sealing plate, a rotating shaft, gears, a first rack, and a second rack. The cylinders are mounted on opposite side walls of the rectangular frame along its length and at the center of the frame along its width. The moving ends of the cylinders are oppositely distributed and both provide driving force to achieve linear movement. The rectangular plates are mounted on the moving ends of the cylinders, with their planes parallel to each other, and move towards or away from each other under the influence of the cylinders. The first heat-sealing plate is mounted between opposite surfaces of the rectangular plates and moves towards or away from each other under the influence of the rectangular plates. The rotating shafts are rotatably mounted on opposite side walls of the rectangular frame along its width and at the center of the frame along its length. The rotating shafts are oppositely distributed and can rotate relative to the rectangular frame. The gears are mounted on opposite ends of the rotating shafts and can rotate independently under the support of the rotating shafts. The first rack is installed on one side of the rectangular plate along the length of the rectangular frame and meshes with the gears on both sides to transmit driving force, converting linear motion into rotational motion. The second rack is installed on the other side of the rectangular plate along the length of the rectangular frame and meshes with the gears on both sides. The second racks on both sides are centrally symmetrical with the first racks on both sides and also transmit driving force, converting linear motion into rotational motion. Driven by the cylinders on both sides, the first heat-sealing plates on both sides abut against each other.

[0019] In operation, controlling the operation of the two cylinders will move the two rectangular plates respectively. This causes the two heat-sealing plates to move closer or further apart, thus completing the sealing action. Simultaneously, the movement of either rectangular plate will move the connected racks on both sides. Through gear meshing, the gears on both sides will rotate. Again through gear meshing, the racks on the other two sides will move in one direction, thus causing the other rectangular plate to move in the opposite direction. Ultimately, this achieves the function of synchronously moving the two heat-sealing plates in opposite directions, improving the sealing effect. Furthermore, if either cylinder stops working, the two rectangular plates can still move synchronously in opposite directions under the transmission of the first rack, gear, and second rack on both sides. This ensures the synchronously moving heat-sealing plates in opposite directions, guaranteeing smooth sealing.

[0020] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are considered similar elements. The drawings do not constitute a limitation of scale, and wherein:

[0022] Figure 1 This is a top view schematic diagram of a plastic film sealing machine provided in an embodiment of this disclosure;

[0023] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0024] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure at point BB;

[0025] Figure 4 This is a front view structural schematic diagram of a plastic film sealing machine provided in an embodiment of this disclosure.

[0026] Figure label:

[0027] 1: Rectangular frame; 2: Cylinder; 3: Rectangular plate; 4: First heat-sealing plate; 5: Rotating shaft; 6: Gear; 7: First rack; 8: Second rack; 9: Support rod; 10: Heat-sealing base plate; 11: Second heat-sealing plate; 12: Cutter; 13: Optical shaft; 14: Metal bushing; 15: Bearing seat; 16: Bearing; 17: Sealing cover; 18: Retaining ring. Detailed Implementation

[0028] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0029] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0030] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0031] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0032] Unless otherwise stated, the term "multiple" means two or more.

[0033] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0034] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0036] Combination Figures 1 to 4As shown, this embodiment of the present disclosure provides a plastic film sealing machine, including a rectangular frame 1, cylinders 2, rectangular plates 3, a first heat-sealing plate 4, a rotating shaft 5, gears 6, a first rack 7, and a second rack 8. Cylinders 2 are respectively installed on opposite side walls of the rectangular frame 1 along its length and located at the middle position of the rectangular frame 1 along its width. The moving ends of the two cylinders 2 are oppositely distributed and both provide driving force to achieve linear movement. Rectangular plates 3 are respectively installed on the moving ends of the two cylinders 2, and the planes of the two rectangular plates 3 are parallel to each other, moving towards or in opposite directions under the drive of the two cylinders 2. The first heat-sealing plate 4 is respectively installed between opposite surfaces of the two rectangular plates 3 and moves towards or in opposite directions under the drive of the two rectangular plates 3. The rotating shaft 5 is rotatably installed on opposite side walls of the rectangular frame 1 along its width and located at the middle position of the rectangular frame 1 along its length. The two rotating shafts 5 are oppositely distributed and can both rotate relative to the rectangular frame 1. Gears 6 are respectively installed at opposite ends of the two rotating shafts 5. Supported by the two rotating shafts 5, the two gears 6 can rotate independently. A first rack 7 is installed along the length of the rectangular frame 1 on either side of the rectangular plate 3 and meshes with the gears 6 on both sides, used to transmit driving force and convert linear motion into rotational motion. A second rack 8 is installed along the length of the rectangular frame 1 on the other side of the rectangular plate 3 and meshes with the gears 6 on both sides. The second racks 8 on both sides are centrally symmetrically distributed with the first racks 7 on both sides, also used to transmit driving force and convert linear motion into rotational motion. Driven by the cylinders 2 on both sides, the first heat-sealing plates 4 on both sides abut against each other.

[0037] This embodiment of the plastic film sealing machine controls the operation of two cylinders 2, which in turn drive the two rectangular plates 3 to move. This causes the two heat-sealing plates to move closer or further apart, thus completing the sealing action. Simultaneously, when either rectangular plate 3 moves, it drives the connected racks on both sides to move. Through the meshing of the teeth, the gears 6 on both sides rotate. Again through the meshing of the teeth, the other two racks on both sides move in the opposite direction, thus driving the other rectangular plate 3 to move in the opposite direction. Ultimately, this achieves the function of synchronously moving the two heat-sealing plates towards or away from each other, improving the sealing effect. Furthermore, when either cylinder 2 stops working for any reason, the two rectangular plates 3 can still move synchronously towards or away from each other under the transmission of the first rack 7, gear 6, and second rack 8 on both sides. Ultimately, this ensures that the two heat-sealing plates move synchronously towards or away from each other, guaranteeing the smooth progress of the sealing operation.

[0038] Optionally, combined Figure 1 As shown, it also includes support rods 9. Support rods 9 are respectively installed between the rectangular plates 3 on both sides and the first heat-sealing plates 4 on both sides.

[0039] In this embodiment, a support rod 9 is also included, which is separately installed between the two rectangular plates 3 and the two first heat-sealing plates 4. The support rod 9 is used to adjust the relative position of the two rectangular plates 3 and the two first heat-sealing plates 4, so that the two first heat-sealing plates 4 can abut against each other under the drive of the two cylinders 2.

[0040] Optionally, combined Figure 1 , Figure 3 and Figure 4 As shown, it also includes a heat-sealing base plate 10. The heat-sealing base plate 10 is installed between the two side support rods 9 and the two side first heat-sealing plates 4.

[0041] In this embodiment, a heat-sealing base plate 10 is also included, which is respectively installed between the two side support rods 9 and the two side first heat-sealing plates 4. The two side heat-sealing base plates 10 are used to support the installation of the two side first heat-sealing plates 4, so as to facilitate the installation and disassembly of the two side first heat-sealing plates 4 and ensure the stability of the two side first heat-sealing plates 4 after installation.

[0042] Optionally, combined Figure 3 and Figure 4 As shown, it also includes a second heat-sealing plate 11 and a cutter 12. The second heat-sealing plates 11 are respectively installed on the heat-sealing base plates 10 on both sides. Along the height direction of the rectangular frame 1, the two second heat-sealing plates 11 are respectively located below the two first heat-sealing plates 4 on both sides, and are used for sealing. The cutter 12 is respectively installed on the heat-sealing base plates 10 on both sides. Along the height direction of the rectangular frame 1, the two cutters 12 are respectively located between the two first heat-sealing plates 4 and the two second heat-sealing plates 11 on both sides, and are used to cut the sealed area.

[0043] In this embodiment, the operation of the cylinders 2 on both sides is controlled, and under the transmission of the first rack 7, gear 6, and second rack 8 on both sides, the rectangular plates 3 on both sides can move synchronously towards or in opposite directions. Then, driven by the support rods 9 on both sides, the hot air base plates 10 on both sides can move synchronously towards or in opposite directions. Finally, the first heat-sealing plate 4, cutter 12, and second heat-sealing plate 11 on both sides move synchronously towards or in opposite directions. When applied to continuous filling of slender film bags, the first heat-sealing plate 4 and the second heat-sealing plate 11 on both sides can seal the cut ends of the cutter 12 on both sides. This ensures that both the upper and lower ends of the cut end of the slender film strip remain sealed, the upper end of the cut portion is sealed to form an independent package, and the lower end of the retained portion is sealed for the next filling.

[0044] Optionally, combined Figure 1 and Figure 3 As shown, it also includes an optical axis 13. The optical axis 13 is slidably inserted through the two rectangular plates 3 along the length direction of the rectangular frame 1, and is located on both sides of the rectangular frame 1 along the width direction of the rectangular frame 1. Both optical axes 13 are installed on the inner wall of the rectangular frame 1 and serve as guides and supports.

[0045] In this embodiment of the present disclosure, under the guiding support of the optical axes 13 on both sides, the stability of the rectangular plates 3 on both sides when moving can be improved, and the radial force on the moving ends of the cylinders 2 on both sides can be reduced.

[0046] Optionally, combined Figure 1 and Figure 3 As shown, it also includes metal bushings 14. The metal bushings 14 are respectively fitted onto the optical axes 13 on both sides and respectively installed on the rectangular plates 3 on both sides.

[0047] In this embodiment, the system further includes metal bushings 14 that are respectively fitted onto the optical axes 13 on both sides and respectively mounted on the rectangular plates 3 on both sides. The multiple metal bushings 14 are used to reduce the friction between the optical axes 13 on both sides and the rectangular plates 3 on both sides, so as to reduce wear and damage between the components.

[0048] Optionally, combined Figure 1 and Figure 2 As shown, it also includes bearing housings 15 and bearings 16. The bearing housings 15 are mounted on the rectangular frame 1 and respectively fitted onto the two side rotating shafts 5. The bearings 16 are respectively mounted between the two side bearing housings 15 and the two side rotating shafts 5.

[0049] In this embodiment, the two bearing seats 15 are used to support and mount the bearings 16 and limit their movement. The two bearings 16 are used to support and mount the rotatable shafts 5, reducing the frictional force on the shafts 5 and improving their rotational accuracy.

[0050] Optionally, combined Figure 1 and Figure 2 As shown, it also includes a sealing cover 17. The sealing covers 17 are respectively installed at both ends of each bearing housing 15, and the sealing covers 17 at both ends of each side abut against the bearing 16 on the same side.

[0051] In this embodiment, the sealing caps 17 at both ends of each side serve a protective function. They also axially fix the bearing 16 on the same side to prevent axial movement of the bearing 16 relative to the bearing housing 15.

[0052] Optionally, combined Figure 1 and Figure 2 As shown, it also includes a retaining ring 18. The retaining ring 18 is respectively fitted onto the two rotating shafts 5 on both sides. Both rotating shafts 5 include a shaft shoulder, and the bearing 16 on each side is located between the shaft shoulder and the retaining ring 18 on the same side.

[0053] In this embodiment of the disclosure, the fixing ring 18 and the bearing 16 on each side are used to axially fix the rotating shaft 5 on the same side, so as to prevent the rotating shaft 5 on the same side from moving axially relative to the bearing 16.

[0054] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A plastic film sealer characterized by, The utility model relates to a rectangular frame, a cylinder is installed on the opposite side wall of the rectangular frame along the length direction of the rectangular frame, and the moving end of the cylinder is distributed oppositely; a rectangular plate is installed on the moving end of the cylinder, and the planes of the two rectangular plates are parallel to each other; a first heat sealing plate is installed between the opposite faces of the rectangular plate; a rotating shaft is rotatably installed on the opposite side wall of the rectangular frame along the width direction of the rectangular frame, and the rotating shaft is located in the middle of the rectangular frame along the length direction of the rectangular frame; a gear is installed on the opposite end of the rotating shaft; a first rack is installed on the rectangular plate along the length direction of the rectangular frame, and the first rack is engaged with the gear; a second rack is installed on the rectangular plate along the length direction of the rectangular frame, and the second rack is engaged with the gear; the second rack is centrally symmetrically distributed with the first rack; the first heat sealing plate is driven by the cylinder. The utility model further includes a supporting rod installed between the rectangular plate and the first heat sealing plate. The utility model further includes a heat sealing bottom plate installed between the supporting rod and the first heat sealing plate. The utility model further includes a second heat sealing plate installed on the heat sealing bottom plate, and the second heat sealing plate is located below the first heat sealing plate along the height direction of the rectangular frame. The utility model further includes a cutter installed on the heat sealing bottom plate, and the cutter is located between the first heat sealing plate and the second heat sealing plate along the height direction of the rectangular frame. The utility model further includes an optical shaft slidably penetrating the rectangular plate along the length direction of the rectangular frame, and the optical shaft is installed on the inner wall of the rectangular frame. The utility model further includes a metal shaft sleeve sleeved on the optical shaft and installed on the rectangular plate. The utility model further includes a bearing seat installed on the rectangular frame and sleeved on the rotating shaft. The utility model further includes a bearing installed between the bearing seat and the rotating shaft. The utility model further includes a sealing cover installed on the two ends of the bearing seat, and the sealing cover is in contact with the bearing.

2. A plastic film sealer according to claim 1, wherein The utility model further includes a fixing ring sleeved on the rotating shaft, and the bearing is located between the shaft shoulder and the fixing ring. ​ 3. A plastic film sealer as defined in claim 2 wherein, ​ ​ 4. A plastic film sealer according to claim 3, wherein ​ ​ ​ 5. A plastic film sealer according to any one of claims 1 to 4, wherein ​ ​ 6. A plastic film sealer according to claim 5, wherein ​ ​ 7. A plastic film sealer according to any one of claims 1 to 4, wherein ​ ​ ​ 8. A plastic film sealer according to claim 7, wherein ​ ​ 9. A plastic film sealer according to claim 7, wherein ​ ​

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