A transparent paper heat-sealing and shaping device for a cigarette packaging machine

Abstract

The application discloses a cigarette packaging machine transparent paper heat sealing and shaping device, and relates to the technical field of cigarette packaging machines. The device comprises an arc-shaped guide plate and a pre-sealing iron. The arc-shaped guide plate is arranged on the outside of an IV working position of a rotating tower of the packaging machine, the inner arc surface of the arc-shaped guide plate is coaxial with the rotating shaft of the rotating tower, and a rectangular slot is arranged on the downstream side of the arc-shaped guide plate. The pre-sealing iron is arranged on the side of the slot away from the rotating tower and can pass through the slot to pre-seal the side long edge overlap of the transparent paper of a cigarette packet. The width of the slot is 12 mm to 16 mm, and the width of the pre-sealing iron is 8 mm to 12 mm. The device optimizes the width of the slot and the pre-sealing iron, can continuously constrain the transparent paper to prevent the transparent paper from rebounding and wrinkling before heat sealing, can reserve a channel for air discharge to avoid air bubbles during heat sealing, and improves the sealing quality and appearance flatness of the cigarette packet.

Description

Technical Field

[0001] This application relates to the field of cigarette packaging machinery technology, specifically to a heat-sealing and shaping device for transparent paper in a cigarette packaging machine. Background Technology

[0002] In the cigarette packaging industry, high-speed hard-pack packaging machines such as the FOCKEFX2 are widely used in cigarette production. This machine uses a rotating tower structure as its core conveyor. Cigarette packs wrapped in transparent paper are held on the rotating tower and rotate with it, passing through multiple stations to complete the folding and heat sealing of the transparent paper. At stations IV, V, and VI of the rotating tower, soldering irons are installed to heat seal the long side overlaps of the transparent paper on the small packs. Station IV performs pre-heat sealing, while stations V and VI mainly serve for finishing and smoothing. Before the cigarette pack reaches station IV, it passes through a fixed arc-shaped guide plate. The inner arc surface of this guide plate is coaxial with the rotating tower and is used to shape the folded transparent paper. The guide plate has slots to allow the pre-heat sealing soldering iron at station IV to descend and perform the heat sealing action.

[0003] However, in actual operation, especially during the transition phase when the packaging machine is running at low speed or after stopping, the existing equipment has a prominent problem: wrinkles and air bubbles are very easy to form at the long edge of the transparent paper on the small package. This results in the cigarette packs produced at this stage having an unqualified appearance and must be manually removed, which seriously affects production efficiency and product quality stability.

[0004] Therefore, this application proposes a heat-sealing and shaping device for transparent paper in cigarette packaging machines, which can eliminate looseness, wrinkles, and air bubbles at the long edge overlap of small pack transparent paper during low speed and start-up stages, improve the consistency and stability of product appearance quality, and reduce unnecessary material waste and manual intervention. Utility Model Content

[0005] The main purpose of this application is to provide a heat-sealing and shaping device for transparent paper in cigarette packaging machines, which aims to solve the technical problem that the long edge overlap of small package transparent paper will inevitably produce loose wrinkles and air bubbles due to insufficient shaping and ineffective air discharge during the low-speed operation and start-stop transition of the packaging machine.

[0006] To achieve the above objectives, this application provides the following technical solution: A heat-sealing and shaping device for transparent paper in a cigarette packaging machine, wherein the packaging machine is equipped with a rotating tower, and the heat-sealing and shaping device for transparent paper includes: An arc-shaped guide plate is disposed on the outside of station IV of the rotating tower. Its inner arc surface is coaxial with the rotating axis of the rotating tower, and at least one rectangular slot is opened on its downstream side along the rotation direction of the rotating tower. At least one preheating sealing iron is provided on the side of each slot away from the rotating tower, and can simultaneously pass through the slot to preheat seal the long side overlap of the transparent paper of the cigarette pack passing through station IV. The width of the slot is 12mm to 16mm, and the width of the preheating soldering iron is 8mm to 12mm.

[0007] As a further improvement of this application, the inner arc surface is provided with multiple stripes arranged linearly along its axial direction, and the extension direction of the stripes is consistent with the rotation direction of the rotating tower.

[0008] As a further improvement of this application, the inlet edge of the slot is provided with an inwardly protruding flange.

[0009] As a further improvement of this application, the width of the preheating sealing iron is smaller than the width of the overlap of the long side of the transparent paper of the cigarette pack.

[0010] As a further improvement to this application, the difference between the width of the slot and the width of the preheating soldering iron is 2mm to 6mm.

[0011] As a further improvement of this application, the arc-shaped guide plate is fixedly installed on the frame of the packaging machine via a connecting frame on the upstream side of the rotating tower along the rotation direction.

[0012] The technical solution provided in this application may include the following beneficial effects: In this application, by setting the width of the arc-shaped guide plate slot to 12mm to 16mm, the overlap of the transparent paper on the side of the cigarette pack is still constrained by the inner arc surface of the arc-shaped guide plate when it reaches the preheat sealing station. This suppresses the rebound of the transparent paper and solves the problem of loosening and wrinkling caused by loss of constraint before heat sealing. Simultaneously, by setting the width of the preheat sealing soldering iron to 8mm to 12mm, it does not completely cover the overlap of the transparent paper during preheat sealing, leaving an escape channel for air between the two layers of transparent paper. This allows air to be squeezed out by the heat sealing pressure, solving the problem of air bubbles forming due to trapped air. The coaxial arrangement of the inner arc surface of the arc-shaped guide plate with the rotating tower shaft provides a stable structural foundation for the synergistic effect of the slot and the soldering iron, ensuring the continuous production of qualified cigarette packs without loosening, wrinkling, or bubbles even at low speeds and during start-up and shutdown phases, thus improving product quality and production efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1This is a three-dimensional structural diagram of the arc-shaped guide plate of the heat-sealing and shaping device for transparent paper in a cigarette packaging machine according to this application. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of the arc-shaped guide plate of the heat-sealing and shaping device for transparent paper in a cigarette packaging machine according to this application. Figure 2 ; Figure 3 This is a three-dimensional structural diagram of a preheating soldering iron for a transparent paper heat-sealing and shaping device for a cigarette packaging machine. Figure label: 1. Curved guide plate; 11. Groove; 12. Stripes; 13. Flange; 2. Preheating soldering iron; 3. Connecting bracket. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0016] Figure 1-3 An embodiment of a heat-sealing and shaping device for transparent paper in a cigarette packaging machine is shown in this application. See also: Figure 1 In this embodiment, the packaging machine is equipped with a rotating tower, and the transparent paper heat sealing and shaping device includes: an arc-shaped guide plate 1 and at least one preheating sealing iron 2.

[0017] The arc-shaped guide plate 1 is located outside the IV station of the rotating tower. Its inner arc surface is arranged coaxially with the rotating tower's axis of rotation, and a rectangular slot 11 is opened on the downstream side along the rotation direction of the rotating tower. A preheating sealing iron 2 is provided on the side away from the rotating tower corresponding to the slot 11, which can simultaneously pass through the slot 11 to preheat seal the long edge overlap of the transparent paper side of the cigarette pack passing through the IV station. The width of the slot 11 is set to 12mm to 16mm, and the width of the preheating sealing iron 2 is set to 8mm to 12mm.

[0018] The following describes a complete workflow of this device, based on the above structure: During operation, the tobacco packs that rotate with the turret first enter the arc-shaped guide plate 1. At this stage, the arc-shaped guide plate 1 provides a circumferential constraint to the transparent paper on the outside of the tobacco pack, ensuring that it adheres tightly to the surface of the tobacco pack and completes the initial shaping.

[0019] When the cigarette pack moves downstream of the curved guide plate 1 and approaches station IV, the long edge of its transparent paper overlaps into the rectangular slot 11 area on the curved guide plate 1. This slot 11, with a width of 12mm to 16mm, allows the inner curved surface of the curved guide plate 1 to continue effectively constraining the non-heat-sealed area of ​​the transparent paper overlap, thereby suppressing the elastic rebound of the BOPP transparent paper and preventing wrinkles before heat sealing.

[0020] When the cigarette pack comes to a precise stop at station IV along with the rotating tower, the preheating sealing iron 2, driven by the drive mechanism, simultaneously passes through slot 11 from the side away from the rotating tower and presses against the overlap of the transparent paper. The width of the preheating sealing iron 2 is set to 8mm to 12mm, a size smaller than the width of the overlap of the transparent paper, allowing continuous venting channels to be formed on both sides of the overlap during the heat sealing process. When the heat sealing pressure is applied, the air between the two layers of transparent paper is fully squeezed out through these channels, effectively preventing the formation of air bubbles.

[0021] After preheating and sealing, the preheating and sealing soldering iron 2 is lifted and reset, and the cigarette pack continues to rotate with the rotating tower to enter the subsequent station for cosmetic and leveling treatment. After being processed by this device, the cigarette pack has achieved a uniform and flat preheating seal at the overlap of its transparent paper, laying a good foundation for subsequent processing and ultimately producing a cigarette pack product with a qualified appearance.

[0022] In one specific embodiment, the width of the slot 11 is set to 3mm, and the width of the preheating sealing iron 2 is set to 10mm. This specific combination of dimensions was determined through precise calculation and experimental verification based on the 12.5mm overlap width of the long side of the transparent paper of the Yunyan (purple) small pack and the thickness of the cigarette pack.

[0023] It should be noted that the specific widths of the aforementioned slot 11 and the preheating sealing iron 2, and their difference, are key designs set for the specific physical properties (such as stiffness and thickness) of the cigarette pack and the transparent paper, as well as the operating parameters of the equipment. Any simple modifications based on the inventive concept of this case that deviate from this specific dimensional relationship may not be able to simultaneously achieve the synergistic effect of effective binding and sufficient venting.

[0024] In another specific embodiment, in order to meet the production needs of the dual-channel packaging machine, the slot 11 extends axially along the inner arc surface and two slots are arranged in a row. Correspondingly, two preheating sealing irons 2 are also provided.

[0025] Furthermore, to improve the smoothness of tobacco pack conveying, multiple stripes 12 arranged linearly along its axial direction are provided on the inner arc surface of the arc-shaped guide plate 1. The extending direction of these stripes 12 is consistent with the rotation direction of the rotating tower.

[0026] Furthermore, to enhance the pre-binding effect on the transparent paper, an inwardly protruding flange 13 is provided at the entrance edge of the slot 11.

[0027] Furthermore, to ensure that air can be fully expelled during the preheating sealing process, the width of the preheating sealing soldering iron 2 is set to be smaller than the width of the overlap of the long side of the transparent paper on the cigarette pack.

[0028] Furthermore, in order to achieve the best fit between the slot 11 and the preheating soldering iron 2, the difference between the width of the slot 11 and the width of the preheating soldering iron 2 is set to 2mm to 6mm.

[0029] In one specific embodiment, the difference between the width of the slot 11 and the width of the preheating soldering iron 2 is set to 4 mm. This specific difference is determined based on a comprehensive consideration of the cigarette pack thickness, the width of the overlap on the long side of the transparent paper, and the equipment operating clearance requirements.

[0030] Furthermore, the arc-shaped guide plate 1 is fixedly installed on the frame of the packaging machine via a connecting frame 3 on the upstream side along the rotation direction of the rotating tower. The connecting frame 3 adopts an adjustable design, with elongated holes and fastening bolts, which facilitates fine-tuning of the position of the arc-shaped guide plate 1 to ensure its precise and reliable relative position with the rotating tower.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

[0032] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat-sealing and shaping device for transparent paper in a cigarette packaging machine, wherein the packaging machine is equipped with a rotating tower, characterized in that, The transparent paper heat-sealing and shaping device includes: An arc-shaped guide plate is disposed on the outside of station IV of the rotating tower. Its inner arc surface is coaxial with the rotating axis of the rotating tower, and at least one rectangular slot is opened on its downstream side along the rotation direction of the rotating tower. At least one preheating sealing iron is provided on the side of each slot away from the rotating tower, and can simultaneously pass through the slot to preheat seal the long side overlap of the transparent paper of the cigarette pack passing through station IV. The width of the slot is 12mm to 16mm, and the width of the preheating soldering iron is 8mm to 12mm.

2. The heat-sealing and shaping device for transparent paper according to claim 1, characterized in that, The inner arc surface is provided with multiple stripes arranged linearly along its axis, and the extension direction of the stripes is consistent with the rotation direction of the rotating tower.

3. The heat-sealing and shaping device for transparent paper according to claim 1, characterized in that, The inlet edge of the slot has an inwardly protruding flange.

4. The heat-sealing and shaping device for transparent paper according to claim 1, characterized in that, The width of the preheating soldering iron is smaller than the width of the overlap on the long side of the transparent paper of the cigarette pack.

5. The heat-sealing and shaping device for transparent paper according to claim 1, characterized in that, The difference between the width of the slot and the width of the preheating soldering iron is 2mm to 6mm.

6. The heat-sealing and shaping device for transparent paper according to claim 1, characterized in that, The arc-shaped guide plate is fixedly installed on the frame of the packaging machine via a connecting frame on the upstream side along the rotation direction of the rotating tower.

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