Nozzle, heating unit and sealing mechanism

Abstract

The utility model relates to a nozzle, a heating unit and a sealing mechanism. The nozzle comprises a fixing part provided with an air inlet channel; and a nozzle part provided with an inner cavity and a spray hole. The nozzle part is detachably installed on the fixing part, and the installation position of the nozzle part relative to the fixing part can be adjusted. The heating unit comprises the nozzle. The sealing mechanism comprises a plurality of heating units. According to the nozzle, the heating unit and the sealing mechanism, the nozzle comprises the fixed part and the nozzle part, and the mounting position of the nozzle part relative to the fixed part can be adjusted, so that the nozzle part can be conveniently sealed even under the condition that the lug wing of a package with a smaller size is sealed; and / or under the condition that the mounting cross beam of the heating unit is expanded and lengthened by heating, the proper heating position of the nozzle can be ensured by adjusting the mounting position of the nozzle part relative to the fixed part, so that the bonding area for the lug wing of the package can be effectively heated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of packaging, more particularly, to a heating unit for heating packaging ear wings, a nozzle of the heating unit and a sealing mechanism comprising the heating unit. BACKGROUND

[0002] The content of this section only provides background information related to the utility model and can not constitute the prior art.

[0003] In order to seal the ear wings of the package, the nozzle of the sealing mechanism is usually used to blow hot gas to the bonding area of the ear wings of the package to activate the bonding area of the ear wings of the package, so as to seal the ear wings to the package body. In the existing design of the sealing mechanism for sealing the ear wings of the package, the nozzles for blowing hot gas are usually fixedly installed on the same mounting beam, and the installation position of each nozzle relative to the mounting beam is fixed and cannot be adjusted. During the heating process to seal the ear wings of the package, the mounting beam is prone to expansion and lengthening due to heat, so that the position of the nozzle for blowing hot gas to the ear wings of the package and the heating area change, thereby causing the bonding area of the ear wings of the package to be unable to be effectively activated due to incomplete heating, and effective bonding cannot be achieved. Moreover, in the existing design of the sealing mechanism, the same sealing mechanism is usually used for different sizes of packages. When the sealing mechanism is used to seal the ear wings of a smaller package, the distance between the nozzle and the bonding area of the package is larger, which affects the heating effect of the bonding area of the ear wings of the package, and the above-mentioned problem of incomplete heating caused by the expansion and lengthening of the beam due to heat is more obvious.

[0004] Therefore, it is desirable to improve the design of the existing sealing mechanism. SUMMARY

[0005] The utility model aims at solving one or more of the above technical problems. One object of the utility model is to improve the design of the sealing mechanism, so that the installation position of the nozzle of the sealing mechanism can be adjusted to enable the nozzle to be installed at a suitable position as needed to ensure that the heating unit of the sealing mechanism can effectively heat the package. Another object of the utility model is to improve the design of the sealing mechanism to improve the heating efficiency and heating effect of the heating unit of the sealing mechanism.

[0006] One aspect of the utility model is to provide a nozzle. The nozzle comprises a fixed part provided with an air inlet channel, and a nozzle part provided with an inner cavity and a jet hole, the nozzle part being installed to the fixed part so that the inner cavity communicates with the outlet of the air inlet channel. The nozzle part is detachably installed to the fixed part, and the installation position of the nozzle part relative to the fixed part can be adjusted.

[0007] In one embodiment, the nozzle portion is secured to the fixed portion by a fastener, and the nozzle portion is provided with a mounting slot configured to allow the fastener to move in the mounting slot relative to the nozzle portion to adjust the mounting position of the nozzle portion relative to the fixed portion.

[0008] In one embodiment, one of the fixed portion and the nozzle portion is provided with a protrusion, and the other of the fixed portion and the nozzle portion is provided with a guide slot configured to accommodate the protrusion and allow the protrusion to move in the guide slot relative to the other of the fixed portion and the nozzle portion to move the fastener in the mounting slot relative to the nozzle portion.

[0009] In one embodiment, the nozzle is configured to blow heated gas toward a package. The nozzle portion includes a first surface provided with a plurality of ejection holes, the first surface being adapted to face an ear flap of the package. Also, the nozzle portion is adapted to move relative to the fixed portion along a first axis to adjust the mounting position of the nozzle portion relative to the fixed portion, the nozzle portion being configured such that the center axes of the ejection holes on the first surface form an acute angle with the first axis.

[0010] In one embodiment, the center axes of the ejection holes on the first surface are perpendicular to the first surface, and the first surface is inclined relative to the first axis.

[0011] In one embodiment, the first surface is parallel to the first axis, and the center axes of the ejection holes on the first surface are inclined relative to the first surface.

[0012] In one embodiment, the nozzle portion further includes a second surface substantially perpendicular to the first axis, and the second surface is also provided with a plurality of ejection holes.

[0013] In one embodiment, a first ejection region on the first surface provided with ejection holes and a second ejection region on the second surface provided with ejection holes are arranged such that the second ejection region is rotationally symmetrical relative to at least a portion of the first ejection region with respect to an intersection line between the first surface and the second surface.

[0014] In one embodiment, the area of the first ejection region is greater than the area of the second ejection region.

[0015] Another aspect of the present application provides a heating unit, which comprises the nozzle according to the present application.

[0016] In one embodiment, the heating unit further includes a mounting crossbeam provided with an inner cavity. The fixed portion of the nozzle is fixedly mounted to the mounting crossbeam such that the air inlet passage of the fixed portion is in communication with the inner cavity of the mounting crossbeam.

[0017] In one embodiment, the heating unit further includes a heating device connected to the mounting beam and configured to heat the gas and supply the heated gas to the interior of the mounting beam.

[0018] In one embodiment, the heating unit includes a pair of nozzles mounted such that the nozzle portions of the pair of nozzles face each other in the direction along a first axis along which the nozzle portions move relative to the fixed portion.

[0019] Another aspect of this invention is to provide a sealing mechanism for sealing the flaps of a package. The sealing mechanism includes a plurality of heating units according to this invention, and each heating unit is arranged independently of the others.

[0020] According to the present invention, the nozzle, heating unit, and sealing mechanism are configured such that the nozzle includes a fixing part and a nozzle part, and the installation position of the nozzle part relative to the fixing part is adjustable. This allows the nozzle part to be installed in a suitable position even when sealing the ear flaps of small packages, and / or when the mounting beam of the heating unit expands due to heat and becomes longer. This ensures that the nozzle part is properly heated and can effectively heat the adhesive area of ​​the package for the ear flaps. Attached Figure Description

[0021] The following description, by way of example only, refers to the accompanying drawings of embodiments of the nozzle, heating unit, and sealing mechanism of this utility model. In the drawings, the same features or parts are indicated by the same reference numerals, and the drawings are not necessarily drawn to scale.

[0022] Figure 1 A front view of the sealing mechanism according to a first embodiment of the present invention is shown;

[0023] Figure 2 A schematic diagram of a package with ear flaps to be sealed is shown;

[0024] Figure 3 It shows Figure 1 A partial perspective view of the sealing mechanism shown;

[0025] Figure 4 It shows Figure 1 A perspective view of the nozzle with the sealing structure shown;

[0026] Figure 5 It shows Figure 4 An exploded view of the nozzle shown;

[0027] Figure 6 It shows Figure 4 A perspective view of the nozzle fixing part shown;

[0028] Figure 7 a longitudinal sectional view of the nozzle shown in Figure 4

[0029] Figure 8 an enlarged view in circle A in Figure 1

[0030] Figure 9 a longitudinal sectional view of the nozzle of the sealing mechanism according to the first modification example of the first embodiment of the present application;

[0031] Figure 10 a perspective view of the sealing mechanism according to the related art;

[0032] Figure 11 a perspective view of the nozzle of the sealing mechanism shown in Figure 10

[0033] Figure 12 a longitudinal sectional view of the nozzle shown in Figure 10

[0034] a perspective view of the sealing mechanism according to the second embodiment of the present application; Figure 13

[0035] a perspective view of the nozzle of the sealing mechanism shown in Figure 14 Figure 13

[0036] Figure 15 a perspective view of the nozzle portion of the nozzle shown in Figure 14

[0037] Figure 16 a perspective view of the nozzle of the sealing mechanism according to the first modification example of the second embodiment of the present application. DETAILED DESCRIPTION

[0038] The following description is merely exemplary in nature and is not intended to limit the present application, its application, and uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or similar elements and features. The various embodiments of the application are illustrated schematically in the figures and are not necessarily drawn to scale. Certain portions of the embodiments can be shown exaggerated in size, or in somewhat schematic form and can not necessarily appear to scale or in exact proportions. Details of structure and arrangement of parts in the various embodiments of the application can be illustrated in specific drawings.

[0039] In the description of the various embodiments of the present application, the orientation terms related to "upper", "lower", "left", "right", "front", "rear" are described with the orientation of up, down, left, right, front, and rear in the view.​​​​​​

[0040] Figure 1 A front view of the sealing mechanism 1 according to a first embodiment of the present invention is shown. Figure 1 As shown, the sealing mechanism 1 includes a main air supply pipe 10, an air supply duct 11, and multiple heating units. Each heating unit is used to heat the adhesive area of ​​the package P for the ear flaps and includes a heating device 21, a mounting beam 30, and nozzles 40 mounted to the mounting beam 30. The heating device 21 is configured to receive gas to be heated (e.g., air) from the air supply duct 11, heat the gas, and supply the heated gas to the inner cavity of the mounting beam 30. In the example shown, the heating device 21 includes a connecting pipe 211 and a heater 212 mounted to the connecting pipe 211. The inlet of the connecting pipe 211 is connected to the air supply duct 11 to receive the gas to be heated from the air supply duct 11. The heater 212 is mounted to the connecting pipe 211 and configured to heat the gas received within the connecting pipe 211. The outlet of the connecting pipe 211 is connected to and communicates with the inner cavity of the mounting beam 30 to supply the heated gas to the inner cavity of the mounting beam 30. The nozzle 40 is secured to the mounting beam 30 by fasteners 51 (e.g., screws) and configured to receive heated gas from the interior of the mounting beam 30 and blow the heated gas to the adhesive area of ​​the package P for the ear flap.

[0041] Figure 2 A three-dimensional schematic diagram of package P, with its ear flaps to be sealed, is shown. (See diagram below.) Figure 2 As shown, adhesive areas P1 for the ear flaps are provided on both sides of the longitudinal end of the packaging P, and corresponding adhesive areas P2 for the ear flaps are provided on the main body of the packaging P. The nozzle 40 is configured to blow heated gas into the adhesive areas P1 and P2 of the packaging P to activate them, so that when the ear flaps of the packaging P are pressed towards the main body of the packaging P, the adhesive areas P1 and P2 adhere to each other, thereby sealing the ear flaps of the packaging P. Typically, the area of ​​adhesive area P1 is larger than the area of ​​adhesive area P2, so that when the ear flaps of the packaging P are sealed, adhesive area P1 covers adhesive area P2, and the ear flaps of the packaging P can completely cover adhesive area P2, making the packaging more aesthetically pleasing.

[0042] Figure 3 It shows Figure 1 A partial perspective view of a heating unit of the sealing mechanism 1 shown schematically illustrates how this heating unit heats the package P. This heating unit is located at the end of the mounting beam 30. Figure 1 A heating unit is located at the left end of the sealing mechanism 1, and the other heating units of the sealing mechanism 1 have the same structure as this heating unit.

[0043] As shown in Figure 3 , in one heating unit, a pair of nozzles 40 are mounted opposite each other, and the package P is placed between the pair of nozzles 40 so that the pair of nozzles 40 simultaneously heat the adhesive areas of the earflaps on both sides of the package P.

[0044] Figure 4 A perspective view of the nozzle 40 is shown, and Figure 5 an exploded view of the nozzle 40 is shown. As shown in Figure 4 and Figure 5 , the nozzle 40 includes a fixed portion 41, a nozzle portion 42, and a baffle plate 43. The body of the fixed portion 41 is provided with a mounting hole 411, an air inlet passage 412, and mounting holes 413 disposed on both sides of the air inlet passage 412 (only one side of the mounting hole 413 is shown in Figure 4 and Figure 5 ). The mounting hole 411 is formed as a counterbore and extends within the fixed portion 41 but does not penetrate the fixed portion 41. The mounting hole 411 is configured to engage a fastener 51 (shown in Figure 1 and Figure 3 ) to secure the fixed portion 41 to the mounting crossbeam 30. The air inlet passage 412 is disposed longitudinally through the fixed portion 41. When the fixed portion 41 is installed in place on the mounting crossbeam 30, the inlet of the air inlet passage 412 of the fixed portion 41 communicates with the internal cavity of the mounting crossbeam 30 to receive gas (e.g., heated gas) from the mounting crossbeam 30. The mounting holes 413 are formed as through holes and are configured to engage with fasteners 52 (e.g., screws) to secure the fixed portion 41 and the nozzle portion 42 to each other.

[0045] The nozzle portion 42 is provided with an internal cavity. The baffle plate 43 is configured to be secured to the nozzle portion 42 via fasteners 53 (e.g., screws). As best shown in Figure 5 , four fasteners 53 pass through corresponding through holes 431 on the baffle plate 43 and engage into corresponding mounting holes 427 on an end face of the nozzle portion 42 to secure the baffle plate 43 to the end face of the nozzle portion 42, thereby closing the internal cavity of the nozzle portion 42 on that end face of the nozzle portion 42. A communication hole 425 is provided on one side surface of the nozzle portion 42, which communicates with the internal cavity of the nozzle portion 42 and is normally closed using a closure 426. The closure 426 can be removed as needed to install a measuring device to the communication hole 425 for measurement (e.g., for measuring air pressure).

[0046] The mounting surface 428 of the nozzle portion 42 facing the fixed portion 41 is provided with a plurality of air outlet passages 429 (only one air outlet passage 429 is shown in Figure 4 and Figure 5The upper surface of the fixed portion 41 (i.e., the upper surface of the fixed portion 41 in the state shown in FIG. 4) is provided with an air inlet 422 and mounting grooves 423 located on both sides of the air inlet 422. The air inlet 422 opens to the inner cavity of the nozzle portion 42. The mounting grooves 423 are formed as elongated through grooves extending through the nozzle portion 42 in the longitudinal direction. The mounting grooves 423 are configured to pass through the fasteners 52 and allow the fasteners 52 to move in the mounting grooves 423 relative to the nozzle portion 42. The fasteners 52 pass through the mounting grooves 423 of the nozzle portion 42 and engage with the mounting holes 413 of the fixed portion 41, so that the fixed portion 41 and the nozzle portion 42 are fixed to each other, as shown in Figure 4 When the fixed portion 41 and the nozzle portion 42 are fixed in place relative to each other, the outlet of the air inlet passage 412 of the fixed portion 41 is aligned with the air inlet 422 of the nozzle portion 42, thereby communicating with the inner cavity of the nozzle portion 42 to supply gas to the inner cavity of the nozzle portion 42.

[0047] During the process of fixing the nozzle portion 42 and the fixed portion 41 to each other, for example, when the fasteners 52 engage with the mounting holes 413 of the fixed portion 41 but have not yet fixed the fixed portion 41 and the nozzle portion 42 to each other, the mounting position of the nozzle portion 42 relative to the fixed portion 41 is adjusted by moving the nozzle portion 42 relative to the fixed portion 41, so that the fasteners 52 move in the mounting grooves 423 relative to the nozzle portion 42. With this configuration, even if the mounting beam 30 is lengthened due to thermal expansion during heating, and / or if the sealing mechanism 1 is used to seal the flaps of a package P having a smaller size, the nozzle 40 can be installed at a suitable position by adjusting the mounting position of the nozzle portion 42 relative to the fixed portion 41, and the nozzle 40 can still be ensured to be at a suitable position relative to the package P to ensure the heating effect of the heating unit on the package P. For example, when the amount of lengthening of the mounting beam 30 at a corresponding working temperature is determined according to empirical data, the mounting position of the nozzle portion 42 of the nozzle 40 relative to the fixed portion 41 can be adjusted accordingly based on the determined amount of lengthening, so that the nozzle 40 is at a suitable heating position. Or for example, the mounting position of the nozzle portion 42 of the nozzle 40 relative to the fixed portion 41 can be adjusted accordingly based on the size of the package to be sealed, so that the nozzle 40 is at a suitable heating position.

[0048] Preferably, the nozzle 40 is further provided with a movement guide portion to guide the relative movement of the nozzle portion 42 relative to the fixed portion 41. In one example, one of the fixed portion 41 and the nozzle portion 42 can be provided with a protrusion, and the other of the fixed portion 41 and the nozzle portion 42 can be provided with a corresponding guide groove configured to accommodate the protrusion and allow the protrusion to move within the guide groove.

[0049] Figure 6 It is shown that Figure 4perspective view of the fixed portion 41 of the nozzle 40 shown in Fig. 1. In the embodiment shown in the figure, the outlet end of the air inlet passage 412 of the fixed portion 41 protrudes from the bottom surface of the fixed portion 41, and the bottom surface of the fixed portion 41 facing the nozzle portion 42 is provided with two protrusions 414. Also, referring back to Figure 5 the mounting surface 428 of the nozzle portion 42 facing the fixed portion 41 is provided with two guide slots 424. The guide slots 424 are configured to accommodate the respective protrusions 414 and allow the protrusions 414 to move within the guide slots 424 relative to the nozzle portion 42. In the process of fixing the nozzle portion 42 and the fixed portion 41 to each other, the outlet end of the air inlet passage 412 of the fixed portion 41 is accommodated in the air inlet opening 422 of the nozzle portion 42, and the protrusions 414 are accommodated in the guide slots 424. When moving the nozzle portion 42 relative to the fixed portion 41 to adjust the mounting position of the nozzle portion 42 relative to the fixed portion 41, the protrusions 414 are adapted to move within the guide slots 424 relative to the nozzle portion 42 to guide the movement of the fastener 52 within the mounting slot 423 relative to the nozzle portion 42, thereby guiding the movement of the nozzle portion 42 relative to the fixed portion 41, so that the movement of the nozzle portion 42 relative to the fixed portion 41 is more stable, and the mounting orientation of the nozzle portion 42 relative to the fixed portion 41 is ensured.

[0050] As Figure 4 best shown in Fig. 2, the nozzle portion 42 comprises a first surface 420 and a second surface 421, both of which are provided with a number of spray holes S communicating with the inner cavity of the nozzle portion 42. The first surface 420 is an upper surface of the nozzle portion 42. The second surface 421 is an end side surface of the nozzle portion 42, which is generally perpendicular to the mounting surface 428 of the nozzle portion 40. When the nozzle 40 is mounted in place on the mounting beam 30, the first surface 420 of the nozzle portion 42 faces the ear flaps of the package P, the spray holes S on the first surface 420 face the adhesive areas PI of the ear flaps of the package P, and the second surface 421 of the nozzle portion 42 faces the side of the body of the package P, the spray holes S on the second surface 421 face the adhesive areas P2, as shown in Fig. 3. Figure 3 Preferably, the first spray region on the first surface 420 of the nozzle 40 provided with the spray holes S corresponds to the adhesive areas PI of the ear flaps of the package P, and the second spray region on the second surface 421 provided with the spray holes S corresponds to the adhesive areas P2 of the package P for the ear flaps. The arrangement pattern of the spray holes S in the first spray region can be the same as or different from the arrangement pattern of the spray holes S in the second spray region. And further preferably, the area of the first spray region is greater than the area of the second spray region, and the first spray region and the second spray region are configured such that the second spray region is rotationally symmetrical relative to the first spray region with respect to the intersection line of the first surface and the second surface, as will be explained hereinafter.

[0051] Figure 7 It shows Figure 4 The longitudinal section of nozzle 40 is shown. (As shown) Figure 7 As shown, during the process of fixing the nozzle portion 42 and the fixing portion 41 to each other, for example, when the fastener passes through the mounting groove 423 of the nozzle portion 42 and engages with the mounting hole 413 of the fixing portion 41 but the fixing portion 41 and the nozzle portion 42 are not yet fixed to each other, the nozzle portion 42 can move relative to the fixing portion 41 along the first axis X to adjust the mounting position of the nozzle portion 42 relative to the fixing portion 41. The first axis X is parallel to the mounting surface 428 of the nozzle portion 42. The injection hole S on the first surface 420 is formed such that the angle θ formed by the central axis O1 of the injection hole S with respect to the first axis X is an acute angle. In the example shown in the figure, the second surface 421 is perpendicular to the first axis X, the first surface 420 is inclined relative to the mounting surface 428, and the central axis O1 of the injection hole S on the first surface 420 is perpendicular to the first surface 420. Specifically, as Figure 7 As shown, the top of the second surface 421 is lower than the mounting surface 428 of the nozzle portion 42 in the vertical direction, and the first surface 420 of the nozzle portion 42 is inclined downward toward the second surface 421 relative to the mounting surface 428 to form an angle β, where angle β and angle θ are complementary angles. For example, angle β can be in the range of 5° ± 2.5°. As described above, preferably, the first spray area on the first surface 420 and the second spray area on the second surface 421 are configured such that the area of ​​the first spray area is larger than the area of ​​the second spray area, and the second spray area is positioned relative to the intersection line O2 of the first surface 420 and the second surface 421 (in... Figure 7 In the diagram, the intersecting line O2 (perpendicular to the paper surface, shown as a dot) is rotationally symmetrical to at least a portion of the first spraying area. That is, when the first surface 420 rotates about the intersecting line O2 to the position of the second surface 421, the second spraying area is located within the first spraying area. With this arrangement, when the heating unit heats the package P, the first spraying area and the second spraying area correspond to the adhesive areas P1 and P2 of the package P, respectively, such that when the flaps of the package P are sealed, the adhesive area P1 of the package P completely covers and adheres to the adhesive area P2.

[0052] Figure 8 It shows Figure 1 The enlarged view in circle A shows a partial view of a heating unit. The nozzle portion 42 of the nozzle 40 can be moved relative to the fixed portion 41 along the first axis X to adjust the mounting position of the nozzle portion 42 relative to the fixed portion 41. Figure 8As shown, the pair of nozzles 40 of the heating unit are mounted such that the nozzle portions 42 of the pair of nozzles 40 face each other in the direction of the first axis X. When the nozzles 40 are mounted in place on the mounting beam 30 and the package P whose ear flaps are to be sealed is mounted in place between the pair of nozzles 40, the first surfaces 420 of the nozzles 40 face the adhesive regions PI of the ear flaps of the package P (only in Figure 2 shown), and the second surfaces 421 of the nozzles 40 face the adhesive regions P2 of the package P for the ear flaps (only shown in Figure 2 ). The plane in which the adhesive regions PI of the ear flaps of the package P to be sealed lie is generally inclined. By setting the spray holes S on the first surfaces 420 to form the above-mentioned angle Θ with respect to the first axis X, the spray holes S on the first surfaces 420 can generally blow the heated gas directly against the adhesive regions PI of the ear flaps of the package P, so that the adhesive regions PI can be heated more effectively and uniformly, so that the adhesive regions PI are activated. Preferably, the nozzles 40 and the package P can be mounted such that the central axes OI of the spray holes S are generally perpendicular to the adhesive regions PI of the ear flaps of the package P, so that the distance between each spray hole S on the first surfaces 420 and the adhesive regions PI is generally consistent, so that the heating of the adhesive regions PI is more uniform.

[0053] The above shows and introduces the configuration of one heating unit of the sealing mechanism 1 according to the first embodiment of the present application. Each heating unit of the sealing mechanism 1 has the same configuration, and therefore the above introduction is also applicable to the other heating units of the sealing mechanism 1. All the heating units of the sealing mechanism 1 share the mounting beam 30 formed as a single piece, and the inner cavity of the mounting beam 30 is in communication with the heating device and the nozzles of each heating unit. The heating device of each heating unit supplies the heated gas to the inner cavity of the mounting beam 30, and the heated gas is supplied from the inner cavity of the mounting beam 30 to the nozzles. In the example shown in the drawings, the sealing mechanism 1 includes 6 heating units, and 6 packages P can be heated at the same time. However, the present application is not limited thereto, and in other examples according to the present application, the sealing mechanism 1 can include more or fewer heating units as needed.

[0054] In the sealing mechanism 1 according to the first embodiment of the present application shown in the drawings, the first surfaces 420 of the nozzles 40 are inclined with respect to the mounting surface 428, and the central axes OI of the spray holes S on the first surfaces 420 are perpendicular to the first surfaces 420. However, the present application is not limited thereto. In other examples according to the present application, the orientation between the first surfaces 420 of the nozzles 40 and the mounting surface 428 is not limited to the above orientation. Figure 9A longitudinal sectional view of the nozzle 40A of the sealing mechanism according to the first modification example of the first embodiment of the present application is shown. The nozzle 40A has substantially the same configuration as the nozzle 40 of the sealing mechanism 1 according to the first embodiment of the present application, with the exception of the orientation of the first surface 420A. As shown, the first surface 420A of the nozzle 40A is flush with the mounting surface 428, and the central axis O1 of the jet hole S on the first surface 420A forms an angle Θ with the first axis X and the first surface 420A. The nozzle 40A according to the first modification example of the first embodiment of the present application can likewise achieve the beneficial technical effect of enabling the jet holes S on the first surface 420A to effectively and uniformly heat the bonding area P1 of the ear flaps of the package P in a different configuration. Figure 9

[0055] Figure 10 A perspective view of the sealing mechanism 1B according to the related art is shown, Figure 11 A perspective view of the nozzle 40B of the sealing mechanism 1B shown in Figure 10 A longitudinal sectional view of the nozzle 40B is shown. The sealing mechanism 1B according to the related art has substantially similar configuration as the sealing mechanism 1 according to the first embodiment of the present application, with the exception of the configuration of the nozzle. In the drawings, the same or similar components are denoted using the same reference numerals, and are not introduced again in order to avoid redundancy. Figure 12 In the sealing mechanism 1B, each nozzle 40B is fixedly mounted to the mounting beam 30 via the fastener 51. The nozzle 40B is formed as a single piece, and is provided with the air inlet passage 412B and the mounting hole 411B. The end portion of the fastener 51 passes through the mounting beam 30 and is engaged in the mounting hole 411B of the nozzle 40B to fix the nozzle 40B to the mounting beam 30. The mounting position of the nozzle 40B relative to the mounting beam 30 is not adjustable. As shown,

[0056] As shown, the first surface 420B of the nozzle 40B is provided with one jet hole S, and the second surface 421B of the nozzle 40B is also provided with one jet hole S. The first surface 420B of the nozzle 40B is substantially parallel to the mounting beam 30, and the second surface 420B is substantially perpendicular to the first surface 420B. Figure 11

[0057] All the heating units of the sealing mechanism 1B share the mounting beam 30. Each heating device 21 supplies the heated gas to the inner cavity of the mounting beam 30, and the heated gas is directed towards the package P by the nozzle 40B. Figure 10 ​​When the mounting beam 30 is lengthened due to thermal expansion, the position at which the nozzle 40B fixed to the mounting beam 30 blows heated gas also changes accordingly, the heating effect on the package is poor, and even the bonding areas of the package can not be fully activated, which affects the sealing of the ear flaps of the package.

[0058] Unlike this, in the sealing mechanism 1 according to the first embodiment of the present application, the nozzle 40 is configured to include a fixed part 41 and a nozzle part 42, the fixed part 41 is adapted to be fixedly mounted to the mounting beam, the nozzle part 42 is fixedly mounted to the fixed part 41 in a detachable manner, and the mounting position of the nozzle part 42 relative to the fixed part 41 can be adjusted. Therefore, even in the case where the sealing mechanism 1 is used to seal the ear flaps of a package with a smaller size, and / or in the case where it is judged that the mounting beam 30 will be lengthened due to thermal expansion, the nozzle 40 can still be fixedly mounted at a suitable position by adjusting the mounting position of the nozzle part 42 relative to the fixed part 41, to ensure a suitable heating position of the nozzle 40, so as to effectively heat the bonding areas P1 and P2 of the package P. Moreover, since the fixing manner between the fixed part 41 of the nozzle 40 and the mounting beam 30 is similar to the fixing manner between the nozzle 40B and the mounting beam 30 in the related art sealing mechanism 1B, there is no need to modify other parts of the sealing mechanism 1, so that the heating effect of the heating unit can be ensured with less modification of the sealing mechanism 1.

[0059] In addition, in the sealing mechanism 1 according to the first embodiment of the present application, the nozzle 40 is configured such that the center axis O1 of the spray hole S on the first surface 420 forms the above-mentioned angle β relative to the first axis X, so that the spray hole S on the first surface 420 can blow heated gas substantially against the bonding area P1 of the ear flaps of the package P, so that the bonding area P1 of the ear flaps of the package P can be heated more effectively and uniformly.

[0060] Moreover, in the sealing mechanism 1 according to the first embodiment of the present application, the first surface 420 and the second surface 421 of the nozzle 40 are respectively provided with a plurality of spray holes S, the first spray area on the first surface 420 provided with the spray holes S substantially corresponds to the bonding area P1 of the ear flaps of the package P, and the second spray area on the second surface 421 provided with the spray holes S substantially corresponds to the bonding area P2 of the ear flaps of the package P. Therefore, compared with the sealing mechanism 1B according to the related art, the heating efficiency of the heating unit of the sealing mechanism 1 according to the present application is higher, and each bonding area of the package P can be accurately heated, which is beneficial to the sealing of the ear flaps of the package P.

[0061] Figure 13A perspective view of the sealing mechanism 1C according to the second embodiment of the present application is shown. The sealing mechanism 1C comprises a supply main pipe 10, a supply duct 11, and a plurality of heating units. Each heating unit is configured to heat the adhesive area of the packaged ear wings. Each heating unit comprises a heating device 21, a mounting beam 30C, and a nozzle 40C mounted to the mounting beam 30C.

[0062] In the sealing mechanism 1C according to the second embodiment of the present application, each heating unit is independently provided from each other. More specifically, each heating unit is provided with a separate mounting beam 30C, instead of sharing the same mounting beam. In each heating unit, a connecting piece 22 and a connecting piece 23 are provided on both sides of the mounting beam 30C, the connecting pieces 22 and 23 are connected between the supply duct 11 and the mounting beam 30C, the connecting pieces 22 and 23 are not in communication with the supply duct 11 and the mounting beam 30C, and only provide support for the mounting beam 30C. Through the independent design of each heating unit, the thermal influence of the adjacent heating unit on the mounting beam of the other heating unit can be reduced, thereby reducing the thermal deformation of each mounting beam.

[0063] Figure 14 A perspective view of the nozzle 40C of the sealing mechanism 1C is shown. The nozzle part 40C comprises a fixed part 41C and a nozzle part 42C. The fixed part 41C is provided with an air inlet passage 412C and mounting holes 413C on both sides of the air inlet passage 412C, the mounting holes 413C are used to mount the nozzle part 42C. The fixed part 41C is adapted to be fixedly mounted to the mounting beam 30C, so that the air inlet passage 412C of the fixed part 41C is in communication with the inner cavity of the mounting beam 30C. The fixed part 41C can be fixed to the mounting beam C in a conventional fixed manner, for example, it can be fixed to the mounting beam 30C by screws or by welding, which will not be repeated here.

[0064] The nozzle part 42C is fixedly mounted to the fixed part 41C by the fastener 52 in a detachable manner.

[0065] Figure 15 A perspective view of the nozzle part 42C of the nozzle 40C shown in Figure 14 A perspective view of the nozzle part 42C of the nozzle 40C shown in Figure 15 As shown, the mounting surface 428C of the nozzle 40C facing the fixed part 41C is provided with a mounting groove 423C. The mounting groove 423C is configured to pass through the fastener 52, and allows the fastener 52 to move within the mounting groove 423C relative to the nozzle part 42C. The fastener 52 passes through the mounting groove 423C of the nozzle part 42C and engages into the mounting hole 413C of the fixed part 41C, so as to fix the nozzle part 42C and the fixed part 41C to each other, as shown in Figure 14The mounting position of the nozzle portion 42C relative to the fixing portion 41C can be adjusted by moving the nozzle portion 42C along the first axis X to adjust the position of the fastener 52 relative to the mounting groove 423C of the nozzle portion 42C, for example, when the fastener 52 is engaged with the mounting hole 413C of the fixing portion 41C but the fixing portion 41C and the nozzle portion 42C have not been fixed to each other.

[0066] Preferably, the nozzle 40C is provided with a movement guide portion to guide the movement of the nozzle portion 42C relative to the fixing portion 41C. In the example shown in the drawings, the surface of the fixing portion 41C facing the nozzle portion 42C (i.e. the bottom surface) is provided with a protrusion 414C (shown in Figure 14 the drawings), and the mounting surface 428C of the nozzle portion 42C facing the fixing portion 41C is provided with a recessed guide groove 424C. The protrusion 414C is adapted to fit within the guide groove 424C and is movable along the guide groove 424C, thereby guiding the movement of the nozzle portion 42C relative to the fixing portion 41C along the first axis X.

[0067] The first surface 420C of the nozzle 40C is provided with the injection holes S, and the second surface 421C of the nozzle 40C is also provided with the injection holes S. The first surface 420C is generally parallel to the mounting surface 428C and is spaced apart from the mounting surface 428 in the vertical direction. The second surface 421C is perpendicular to the first axis X and the mounting surface 428. Preferably, similar to the nozzle 40 according to the first embodiment of the present application, the central axes of the injection holes S on the first surface 420C of the nozzle 40C are inclined relative to the first axis X to form an included angle θ, so that when installed in place to heat the package, the injection holes S on the first surface 420C can blow the heated gas generally directly at the bonding area of the ear flaps of the package, thereby effectively and uniformly heating the bonding area of the package.

[0068] The nozzle 40C of the sealing mechanism according to the second embodiment of the present application can achieve similar beneficial technical effects as the nozzle 40 of the sealing mechanism 1 according to the first embodiment of the present application, so that even when the mounting beam of the sealing mechanism is lengthened due to thermal expansion, the mounting position of the nozzle portion 42C relative to the fixing portion 41C of the nozzle 40C can be adjusted so that the nozzle portion 42C is located at a suitable mounting position, ensuring a suitable heating position of the nozzle 40C to effectively heat the bonding area of the package.

[0069] Figure 16A perspective view of the nozzle 40D of the sealing mechanism according to the first modified example of the second embodiment of the present application is shown. The nozzle 40D has substantially the same configuration as the nozzle 40C according to the second embodiment of the present application, with the only difference being that the first projection T is provided on the first surface 420D of the nozzle portion 42D on which the first spray region provided with the spray holes S is provided, the spray holes penetrating the projection T. By providing the projection T, the distance between the spray holes S on the first surface 420 and the bonding region of the ear flaps of the package to be heated can be shortened, thereby enabling the heating efficiency to be improved.

[0070] The above shows the design of the sealing structure, the heating device of the sealing mechanism and the nozzle thereof according to the preferred embodiments of the present application. It should be noted that the designs of the sealing mechanisms according to the preferred embodiments of the present application can be combined with each other. For example, in one example, the nozzle of the sealing mechanism according to the second embodiment of the present application can adopt the nozzle according to any other embodiment or modified example of the present application, for example, can include the nozzle 40 of the sealing mechanism 1 according to the first embodiment of the present application. For example, in another example, the projection T described above can also be provided on the first surface 420 of the nozzle 40 of the sealing mechanism 1 according to the first embodiment of the present application.

[0071] Here, the exemplary embodiments of the sealing structure, the heating device of the sealing mechanism and the nozzle thereof according to the present application have been described in detail, but it should be understood that the present application is not limited to the specific embodiments described and shown in detail above. Those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. All these modifications and variations fall within the scope of the present application. Moreover, all the components described herein can be replaced by other technically equivalent components.

Claims

1. A nozzle comprising: a fixed portion provided with an air inlet passage; and a nozzle portion provided with an inner cavity and a plurality of ejection holes, the nozzle portion being mounted to the fixed portion such that the inner cavity communicates with an outlet of the air inlet passage, characterized in that the nozzle portion is detachably mounted to the fixed portion, and a mounting position of the nozzle portion relative to the fixed portion is adjustable. the nozzle portion is secured to the fixed portion by a fastener, and the nozzle portion is provided with a mounting slot configured to allow the fastener to move in the mounting slot relative to the nozzle portion to adjust the mounting position of the nozzle portion relative to the fixed portion.

2. The nozzle of claim 1, wherein one of the fixed portion and the nozzle portion is provided with a protrusion, and the other of the fixed portion and the nozzle portion is provided with a guide slot configured to accommodate the protrusion and allow the protrusion to move in the guide slot relative to the other of the fixed portion and the nozzle portion to move the fastener in the mounting slot relative to the nozzle portion.

3. The nozzle of claim 2, wherein, the nozzle is configured to blow heated gas toward a package; and 4. The nozzle according to any one of claims 1-3, characterized in that, the nozzle portion includes a first surface provided with a plurality of the ejection holes, the first surface being adapted to face ear flaps of the package; and the nozzle portion is adapted to move along a first axis relative to the fixed portion to adjust the mounting position of the nozzle portion relative to the fixed portion, the nozzle portion being configured such that a center axis of the ejection holes on the first surface forms an acute angle with the first axis. the center axis of the ejection holes on the first surface is perpendicular to the first surface, and the first surface is inclined relative to the first axis.

5. The nozzle of claim 4, wherein, the first surface is parallel to the first axis, and the center axis of the ejection holes on the first surface is inclined relative to the first surface.

6. The nozzle of claim 4, wherein the nozzle portion further includes a second surface substantially perpendicular to the first axis, and the second surface is also provided with a plurality of the ejection holes.

7. The nozzle of claim 4, wherein a first ejection area on the first surface provided with the ejection holes and a second ejection area on the second surface provided with the ejection holes are arranged such that the second ejection area is rotationally symmetrical relative to at least a portion of the first ejection area with respect to an intersection line between the first surface and the second surface.

8. The nozzle of claim 7, wherein, an area of the first ejection area is greater than an area of the second ejection area.

9. The nozzle of claim 8, wherein, the heating unit includes the nozzle according to any one of claims 1-9.

10. A heating unit, characterized by the heating unit further includes a mounting beam provided with an inner cavity; and 11. The heating unit according to claim 10, characterized in that the fixed portion of the nozzle is fixedly mounted to the mounting beam such that the air inlet passage of the fixed portion communicates with the inner cavity of the mounting beam. the heating unit further includes a heating device connected to the mounting beam and configured to heat gas and supply the heated gas to the inner cavity of the mounting beam.

12. The heating unit according to claim 11, characterized in that ​ 13. The heating unit according to any one of claims 10-12, characterized in that, The heating unit includes a pair of the nozzles mounted so that nozzle portions of the pair of the nozzles face each other in a direction of a first axis along which the nozzle portions move with respect to the fixed portions.

14. A sealing mechanism for sealing the ears of a package, characterized in that The sealing mechanism includes a plurality of the heating units according to any one of claims 10 to 13, and each of the heating units is provided independently of each other.

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