Longitudinal sealing mechanism for packaging machine

Abstract

The utility model relates to the field of food packaging, in particular to a longitudinal sealing mechanism for a packaging machine, which comprises a supporting mechanism, a first driving mechanism and a second driving mechanism are fixedly arranged on the supporting mechanism, and the first driving mechanism and the second driving mechanism are respectively arranged on two symmetrical side wall surfaces in the supporting mechanism. The first driving mechanism is in linkage with a position assisting plate, the second driving mechanism is in linkage with a hot melting assembly, the second driving mechanism is in linkage with an adapter plate, at least two guide rods are arranged on the side wall face of the other side of the adapter plate, and each guide rod is in sliding fit with the adapter plate. One end of each guide rod extends into the adapter plate, the other end of each guide rod extends into the hot melting assembly and is fixedly matched with the hot melting assembly, and the section, between the adapter plate and the hot melting assembly, of each guide rod is sleeved with a spring. The packaging machine has the advantages of improving the attractiveness of finished products, prolonging the service life of the packaging machine and reducing the maintenance cost.

Description

Technical Field

[0001] The utility model relates to a packaging machine, in particular to a longitudinal sealing mechanism for a packaging machine. Background Art

[0002] After passing through the forming tube, the packaging film presents a cylindrical shape, and the longitudinal sealing mechanism on the packaging machine is mainly responsible for heat-sealing the side surface of the cylindrical packaging film. At present, the existing longitudinal sealing mechanism usually directly pushes the hot-melt component by a cylinder to heat-seal the packaging film. However, this method has an obvious drawback, that is, when the hot-melt component moves, a large impact force will be generated when the moving distance is too large. This impact force will not only leave marks, depressions or deformations and other defects on the surface of the packaging film, seriously affecting the appearance beauty of the finished product, but also the excessive impact force is likely to cause damage to the hot-melt component, thereby shortening the service life of the packaging machine and increasing the maintenance cost. Content of the Utility Model

[0003] The utility model provides a longitudinal sealing mechanism for a packaging machine, which solves the technical problems of affecting the appearance beauty of the finished product, shortening the service life of the packaging machine and increasing the maintenance cost, and provides the following technical solutions:

[0004] A longitudinal sealing mechanism for a packaging machine includes a support mechanism, on which a first driving mechanism and a second driving mechanism are fixedly arranged. The first driving mechanism and the second driving mechanism are respectively arranged on the symmetric side wall surfaces inside the support mechanism. The first driving mechanism is linked with an assisting plate, and the second driving mechanism is linked with a hot-melt component. The feature is that the second driving mechanism is linked with a transfer plate. On the side wall surface of the other side of the transfer plate, at least two guiding rods are arranged, and each guiding rod is in sliding fit with the transfer plate. The other end of each guiding rod extends into the hot-melt component and is in fixed fit with the hot-melt component. Springs are sleeved on the guiding rods between the transfer plate and the hot-melt component.

[0005] By adopting the above technical solutions, through the setting of the springs, during the process of the second driving mechanism starting to drive the hot-melt component to move towards the packaging film, the springs can play a certain buffering and vibration damping role for the driving force generated by the second driving mechanism. This will slow down the impact force and vibration brought by the hot-melt component during the heat-sealing operation, thereby avoiding deformation of the packaging film due to excessive impact force, and thus improving the appearance beauty of the heat-sealed packaging film; it can also prevent the hot-melt component and the second driving mechanism from being damaged due to excessive impact force, thereby improving the service life and maintenance cost of the packaging machine.

[0006] Further, two first through holes are provided on the adapter plate, and a connecting member is provided in each through hole. The connecting member is a concentric variable-diameter connecting member. The connecting member includes a first tube column and a second tube column integrally formed. The diameter value of the first tube column is greater than the diameter value of the second tube column. The second tube column is concentrically arranged on one side of the first tube column. The other end of the second tube column passes through the first through hole, so that the adapter plate abuts against the side wall surface of the first tube column corresponding to the outer peripheral edge of the second tube column, and the second tube column and the adapter plate are in a fixed fit; the end of the guide rod away from the hot melt assembly is adaptively installed in the connecting member, and the guide rod and the connecting member are in a sliding fit.

[0007] By adopting the above technical solution, through the setting of the connecting member, when the second driving mechanism drives the adapter plate to move, due to the larger diameter of the first tube column, the contact area between the connecting member and the adapter plate can be increased, thereby improving the stability during the heat sealing operation of the hot melt assembly.

[0008] Further, a second through hole is concentrically arranged in the connecting member, and an annular notch is provided on the outer peripheral edge of the guide rod, so that the guide rod corresponding to the annular notch is adapted to the second through hole.

[0009] Further, the other end of the annular notch is located between the hot melt assembly and the connecting member. One end of the spring abuts against the side wall surface of the connecting member, and the other end of the spring abuts against the side wall surface of the guide rod corresponding to the outer peripheral edge of the end close to the hot melt assembly in the annular notch.

[0010] Further, the first driving mechanism includes a first cylinder. The output shaft of the first cylinder is connected with a first driving plate. The first driving plate and the assisting plate are in a fixed fit. The assisting plate is arranged vertically, and an arc-shaped notch is provided on the side end surface of the assisting plate close to the hot melt assembly. The arc-shaped notch is adapted to the outer peripheral edge of the bag making device in the packaging machine.

[0011] By adopting the above technical solution, by arranging the assisting plate in the vertical direction, when the hot melt assembly performs a longitudinal sealing operation on the packaging film, the assisting plate can increase the contact area for restricting the movement of the packaging film, improve the stability of the position of the packaging film during longitudinal sealing, and thus improve the aesthetics of the packaging film after longitudinal sealing.

[0012] Further, the second driving mechanism includes a second cylinder. The output shaft of the second cylinder is connected with a second driving plate. The second driving plate and the adapter plate are in a fixed fit.

[0013] Further, the supporting mechanism includes four side plates connected end to end in sequence, so that the supporting mechanism is in a "mouth" shape. The first driving mechanism and the second driving mechanism are respectively installed on the opposite side wall surfaces of two parallel side plates.

[0014] In summary, the present application has the following beneficial effects:

[0015] 1. Through the setting of the spring, during the process of the second driving mechanism starting to drive the hot melt assembly towards the packaging film, the spring can play a certain buffering and vibration damping role on the driving force generated by the second driving mechanism, which will slow down the impact force and vibration brought during the heat sealing operation of the hot melt assembly, thereby avoiding deformation of the packaging film due to excessive impact force, and thus improving the aesthetics of the packaging film after heat sealing; it can also prevent the hot melt assembly and the second driving mechanism from being damaged due to excessive impact force, thereby improving the service life and maintenance cost of the packaging machine;

[0016] 2. Through the setting of the connecting piece, when the second driving mechanism drives the adapter plate to move, due to the larger diameter of the first pipe column, the contact area between the connecting piece and the adapter plate can be increased, thereby improving the stability of the hot melt assembly during heat sealing operation;

[0017] 3. By arranging the auxiliary positioning plate in the vertical direction, when the hot melt assembly performs longitudinal sealing operation on the packaging film, the auxiliary positioning plate can increase the contact area restricting the movement of the packaging film, improve the stability of the position of the packaging film during longitudinal sealing, and thus improve the aesthetics of the packaging film after longitudinal sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a longitudinal sealing mechanism for a packaging machine of the present invention;

[0019] Figure 2 is a schematic structural diagram of the second driving mechanism in the longitudinal sealing mechanism for a packaging machine of the present invention;

[0020] Figure 3 is a schematic structural diagram of the adapter plate in the longitudinal sealing mechanism for a packaging machine of the present invention;

[0021] Figure 4 is a schematic structural diagram of the connecting piece in the longitudinal sealing mechanism for a packaging machine of the present invention;

[0022] Figure 5 is a top view of the guide rod in the longitudinal sealing mechanism for a packaging machine of the present invention;

[0023] Figure 6 is Figure 5 a cross-sectional view taken along the A-A direction in

[0024] In the figure: 1. Support mechanism; 2. First driving mechanism; 3. Second driving mechanism; 4. Auxiliary positioning plate; 5. Hot melt assembly; 6. Adapter plate; 7. Guide rod; 8. Spring; 9. First through hole; 10. Connecting piece; 1001. First pipe column; 1002. Second pipe column; 11. Second through hole; 12. Annular notch; 13. First driving plate; 14. Arc-shaped notch; 15. Second driving plate. Detailed implementation mode

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further elaborated below in conjunction with specific implementation modes.

[0027] In a specific embodiment, referring to Figures 1-6 , a longitudinal sealing mechanism for a packaging machine includes a support mechanism 1. A first driving mechanism 2 and a second driving mechanism 3 are fixedly arranged on the support mechanism 1. The first driving mechanism 2 and the second driving mechanism 3 are respectively arranged on two symmetric side wall surfaces inside the support mechanism 1. The support mechanism 1 includes four side plates connected end to end in sequence, so that the support mechanism 1 is in a "mouth" shape. The first driving mechanism 2 and the second driving mechanism 3 are respectively installed on the opposite side wall surfaces of two parallel side plates, and the side plates connected by the first driving mechanism 2 are in sliding fit with the corresponding side plates at both ends; the first driving mechanism 2 drives a positioning plate 4, the second driving mechanism 3 drives a hot melt assembly 5, the second driving mechanism 3 drives a transfer plate 6. At least two guide rods 7 are arranged on the side wall surface on the other side of the transfer plate 6, and each guide rod 7 is in sliding fit with the transfer plate 6. The other end of each guide rod 7 extends into the hot melt assembly 5 and is in fixed fit with the hot melt assembly 5. Springs 8 are sleeved on the guide rods 7 between the transfer plate 6 and the hot melt assembly 5. The specific structure and connection method of the hot melt assembly 5 belong to common knowledge and will not be elaborated here too much. The hot melt assembly 5 can be selected with a model that can complete the heat sealing operation on the packaging film and will not be elaborated here too much.

[0028] During the process of the second driving mechanism 3 starting to drive the hot melt assembly 5 to move towards the packaging film, the spring 8 can play a certain buffering and damping role for the driving force generated by the second driving mechanism 3, which will slow down the impact force and vibration brought by the hot melt assembly 5 during the heat sealing operation, thereby avoiding deformation of the packaging film due to excessive impact force, and thus improving the aesthetics of the packaging film after heat sealing; it can also avoid damage to the hot melt assembly 5 and the second driving mechanism 3 due to excessive impact force, thereby improving the service life and maintenance cost of the packaging machine.

[0029] The first driving mechanism 2 includes a first cylinder. The output shaft of the first cylinder is connected with a first driving plate 13. The first driving plate 13 is in fixed fit with the positioning plate 4. The positioning plate 4 is arranged vertically, and an arc-shaped notch 14 is arranged on the side end face of the positioning plate 4 close to the hot melt assembly 5. The arc-shaped notch 14 is adapted to the outer periphery of the bag making device in the packaging machine; when the hot melt assembly 5 performs longitudinal sealing on the packaging film, the positioning plate 4 can increase the contact area restricting the movement of the packaging film, improve the stability of the position of the packaging film during longitudinal sealing, and thus improve the aesthetics of the packaging film after longitudinal sealing.

[0030] The second driving mechanism 3 includes a second cylinder, the output shaft of the second cylinder is connected with a second driving plate 15, and the second driving plate 15 and the adapter plate 6 are fixedly matched.

[0031] Two first through holes 9 are arranged on the adapter plate 6, a connecting piece 10 is arranged in each through hole, and the connecting piece 10 is a concentric variable-diameter connecting piece 10. The connecting piece 10 includes a first pipe column 1001 and a second pipe column 1002 which are integrally formed. The diameter value of the first pipe column 1001 is greater than the diameter value of the second pipe column 1002. The second pipe column 1002 is concentrically arranged on one side of the first pipe column 1001. The other end of the second pipe column 1002 passes through the first through hole 9, so that the adapter plate 6 abuts against the side wall surface of the first pipe column 1001 corresponding to the outer peripheral edge of the second pipe column 1002, and the second pipe column 1002 and the adapter plate 6 are fixedly matched; the end of the guide rod 7 far away from the hot melting assembly 5 is adaptively installed in the connecting piece 10, and the guide rod 7 and the connecting piece 10 are slidably matched; when the second driving mechanism 3 drives the adapter plate 6 to move, due to the larger diameter of the first pipe column 1001, the contact area between the connecting piece 10 and the adapter plate 6 can be increased, thereby improving the stability during the heat sealing operation of the hot melting assembly 5.

[0032] A second through hole 11 is concentrically arranged in the connecting piece 10, and an annular notch 12 is arranged on the outer peripheral edge of the guide rod 7, so that the guide rod 7 corresponding to the annular notch 12 is adapted to the second through hole 11.

[0033] The other end of the annular notch 12 is located between the hot melting assembly 5 and the connecting piece 10. One end of the spring 8 abuts against the side wall surface of the connecting piece 10, and the other end of the spring 8 abuts against the side wall surface of the guide rod 7 corresponding to the outer peripheral edge of the end close to the hot melting assembly 5 in the annular notch 12.

[0034] Operation process: The packaging film moves downward along the outer peripheral edge of the bag making device in the packaging machine. At this time, the packaging film is cylindrical. When the packaging film moves to one side of the hot melting assembly 5, the first cylinder and the second cylinder are started. The first cylinder pushes the auxiliary positioning plate 4 towards the packaging film until the arc notch 14 in the auxiliary positioning plate 4 abuts against the packaging film. The second cylinder pushes the adapter plate 6 towards the packaging film. At this time, the adapter plate 6 pushes the spring 8, so that the spring 8 is in a compressed state. The compressed spring 8 pushes the guide rod 7 towards the packaging film, and the guide rod 7 further pushes the hot melting assembly 5 to perform a heat sealing operation on the sealing part of the packaging film. After the longitudinal sealing is completed, the output shaft of the second cylinder is controlled to retract, so that the hot melting assembly 5 leaves the packaging film and waits for the next longitudinal sealing operation.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A longitudinal sealing mechanism for a packaging machine, comprising a support mechanism, on which a first driving mechanism and a second driving mechanism are fixedly arranged. The first driving mechanism and the second driving mechanism are respectively arranged on two symmetric side wall surfaces within the support mechanism. The first driving mechanism is linked with an assisting plate, and the second driving mechanism is linked with a hot melt assembly, characterized in that, The second driving mechanism is linked with a transfer plate. At least two guide rods are arranged on the side wall surface on the other side of the transfer plate, and each guide rod is in sliding fit with the transfer plate. The other end of each guide rod extends into the hot melt assembly and is in fixed fit with the hot melt assembly. Springs are sleeved on the guide rods between the transfer plate and the hot melt assembly.

2. The longitudinal sealing mechanism for a packaging machine according to claim 1, characterized in that, Two first through holes are arranged on the transfer plate. A connecting piece is arranged in each through hole, and the connecting piece is a concentric variable-diameter connecting piece. The connecting piece includes a first pipe column and a second pipe column which are integrally formed. The diameter value of the first pipe column is greater than that of the second pipe column. The second pipe column is concentrically arranged on one side of the first pipe column. The other end of the second pipe column passes through the first through hole, so that the transfer plate abuts against the side wall surface of the first pipe column corresponding to the outer peripheral edge of the second pipe column, and the second pipe column is in fixed fit with the transfer plate. The end of the guide rod far from the hot melt assembly is adaptively installed in the connecting piece, and the guide rod is in sliding fit with the connecting piece.

3. The longitudinal sealing mechanism for a packaging machine according to claim 2, characterized in that, A second through hole is concentrically arranged in the connecting piece. An annular notch is arranged on the outer peripheral edge of the guide rod, so that the guide rod corresponding to the annular notch is adapted to the second through hole.

4. The longitudinal sealing mechanism for a packaging machine according to claim 3, characterized in that, The other end of the annular notch is located between the hot melt assembly and the connecting piece. One end of the spring abuts against the side wall surface of the connecting piece, and the other end of the spring abuts against the side wall surface of the guide rod corresponding to the outer peripheral edge of the end close to the hot melt assembly in the annular notch.

5. The longitudinal sealing mechanism for a packaging machine according to claim 1, characterized in that, The first driving mechanism includes a first cylinder. The output shaft of the first cylinder is connected with a first driving plate. The first driving plate is in fixed fit with the assisting plate. The assisting plate is arranged vertically, and an arc-shaped notch is arranged on the side end face of the assisting plate close to the hot melt assembly. The arc-shaped notch is adapted to the outer peripheral edge of the bag making device in the packaging machine.

6. The longitudinal sealing mechanism for a packaging machine according to claim 1, characterized in that, The second driving mechanism includes a second cylinder. The output shaft of the second cylinder is connected with a second driving plate. The second driving plate is in fixed fit with the transfer plate.

7. The longitudinal sealing mechanism for a packaging machine according to claim 1, characterized in that, The supporting mechanism includes four side plates connected in sequence end to end, so that the supporting mechanism is in a "mouth" shape. The first driving mechanism and the second driving mechanism are respectively installed on the opposite side wall surfaces of two parallel side plates.

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