Heat sealing device of packaging machine

Abstract

The utility model belongs to the technical field of packaging machines, and discloses a heat sealing device of a packaging machine. The forming wheel rotates around a main shaft, a machining groove is formed in the periphery of the forming wheel, a cigarette case is placed in the machining groove, one side of the forming wheel abuts against a pressing plate, the pressing plate is connected with a transparent paper film in a pressing mode, the pressing plate is in an arc shape, an open hole is formed in the pressing plate, and the inner wall of the open hole abuts against a hot-pressing head; a first sliding hole is formed in the upper side of the first connecting part and is in a long strip shape, a first guide rod is arranged in the first sliding hole in a penetrating mode, the two ends of the first guide rod are connected with a switching part, the switching part is connected with an auxiliary shaft, the auxiliary shaft drives the switching part to rotate, and the axes of the auxiliary shaft, the main shaft and the first guide rod are parallel to one another; the problem that in the prior art, a lower contact face cannot be completely attached to a transparent paper film in an opening, and packaging of the transparent paper film is wrinkled is solved.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, and in particular to a heat sealing device for a packaging machine. Background Technology

[0002] Cigarette products have a transparent paper film wrapped around the outside of the cigarette pack to seal and protect the aroma. The packaging machine uses a heat sealing device to seal the transparent paper film on the outside of the cigarette box, so that the transparent paper film is tightly wrapped around the outside of the cigarette box.

[0003] The cigarette box is inserted onto the outside of the forming wheel. A pressure plate with an opening is installed on the upper side of the forming wheel. When the forming wheel rotates the cigarette box to the first station, the packaging machine installs the transparent paper film on the outside of the cigarette box. Then, the forming wheel continues to rotate the cigarette box to the lower side of the opening. The hot pressing head is mounted on a rotating shaft via a rotating rod. The rotating shaft drives the hot pressing head to rotate and enter the opening, bringing it into contact with the transparent paper film. This ensures the transparent paper film tightly wraps the outside of the cigarette box. However, because the hot pressing head enters the opening in a rotating manner, the contact surface also enters the opening in a rotating manner. The axis of the hot press head is parallel to the rotation axis of the forming wheel. When one side of the contact surface of the hot press head is relative to the cigarette box inside the opening, it will lift up. This will cause the area on one side of the contact surface to not fully adhere to the corresponding transparent paper film on the lower side. The transparent paper film cannot be hot-pressed, causing the transparent paper film in this area to wrinkle, affecting the packaging effect. At the same time, in order to avoid the hot press head and the pressure plate being limited, and to facilitate the subsequent adjustment of the hot pressing position, the opening will be widened, resulting in a gap between the opening and the hot press head. The transparent paper film in the gap cannot be hot-pressed, and wrinkling will also occur. Utility Model Content

[0004] The purpose of this invention is to provide a heat sealing device for a packaging machine, which solves the problem that the contact surface cannot fully adhere to the transparent paper film inside the opening under the existing technology, resulting in wrinkles in the transparent paper film packaging.

[0005] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a heat sealing device for a packaging machine, including a forming wheel that rotates around a main shaft. A processing groove is formed on the outer circumference of the forming wheel, and a cigarette box is placed in the processing groove. A pressure plate abuts against one side of the forming wheel, and the pressure plate presses a transparent paper film onto the pressure plate. The pressure plate is arc-shaped and has an opening. The inner wall of the opening abuts against a hot press head. A first connecting part is installed on the upper side of the hot press head, and a first sliding hole is opened on the upper side of the first connecting part. The first sliding hole is elongated, and a first guide rod passes through the first sliding hole. Both ends of the first guide rod are connected to a transition part. The transition part is connected to an auxiliary shaft, and the auxiliary shaft drives the transition part to rotate. The axes of the auxiliary shaft, the main shaft, and the first guide rod are parallel to each other.

[0006] Preferably, the hot press head includes a guide and an electric heating element. The guide has a first through hole, and the electric heating element has a first stud on its upper side. The first stud passes through the first through hole, and a first nut is screwed onto the first stud. The first nut abuts against the guide. The area of ​​the guide is larger than that of the electric heating element, and the guide abuts against the inner wall of the opening in the circumferential direction.

[0007] Preferably, the guide element is made of copper.

[0008] Preferably, a heat insulation sheet is sandwiched between the guide and the electric heating element, and a sleeve is formed on the heat insulation sheet. The first stud passes through the sleeve, and the sleeve is inserted into the first through hole.

[0009] Preferably, a guide portion is formed on the circumferential protrusion of the opening on the outer side of the pressure plate, and a guide groove is formed in the guide portion, with a chamfer formed on one side of the opening.

[0010] Preferably, the first connecting portion is screwed into the guide member.

[0011] Preferably, the adapter includes an adapter bracket, a second connecting part, and a second guide rod. The second connecting part has a second sliding hole, and the second guide rod is inserted into the second sliding hole. The second connecting part is screwed onto the auxiliary shaft. The adapter bracket is H-shaped and includes ribs with gaps between them. The first connecting part and the second connecting part are inserted into the gaps. The ribs have symmetrical fixing screw holes at both ends, and the first guide rod and the second guide rod are screwed into the fixing screw holes. The first guide rod and the second guide rod are parallel.

[0012] Beneficial effects: Driven by the rotation of the auxiliary shaft, the adapter rotates with the auxiliary shaft. The first guide rod at the front end of the adapter slides along the length of the first sliding hole in the first sliding hole, so that the hot press head can move up and down perpendicular to the height of the opening, so that the lower side of the hot press head can be completely adhered to the transparent paper film on the cigarette box, resulting in a better sealing effect. Attached Figure Description

[0013] Figure 1 This is a main drawing of the heat sealing device for a packaging machine according to this utility model;

[0014] Figure 2 This is an installation diagram of the hot press head for this utility model;

[0015] Figure 3 This is an exploded view of the hot press head of this utility model.

[0016] In the diagram: 1. Forming wheel; 11. Processing groove; 12. Guide part; 2. Cigarette box; 3. Pressure plate; 31. Opening; 4. Hot press head; 41. Guide part; 411. First through hole; 42. Hot heat setting part; 421. First stud; 43. Heat insulation sheet; 431. Sleeve; 5. First connecting part; 6. First guide rod; 7. Adapter part; 71. Adapter bracket; 711. Rib plate; 72. Second connecting part; 73. Second guide rod; 8. Auxiliary shaft. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0018] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0021] In the existing technology, the connecting rod is rotated by the auxiliary shaft, and the hot press head installed perpendicular to the connecting rod also rotates. When the hot press head approaches the cigarette box on the forming wheel along the opening, it still moves downward in an arc. This requires increasing the area of ​​the opening to avoid the hot press head being limited by the inner wall of the opening when it moves in an arc in the height direction of the opening. This causes part of the transparent paper film on the cigarette box to be exposed, resulting in wrinkles during the hot pressing process. At the same time, since the contact surface on the lower side of the hot press head is flat, when the hot press head rotates with the auxiliary shaft to approach the cigarette box, the contact surface will form a certain angle with the surface of the transparent paper film, causing the transparent paper film on one side to not be hot pressed, resulting in wrinkles in the transparent paper film of the final cigarette box packaging.

[0022] To solve the above problems, such as Figures 1 to 3 As shown, this utility model provides a heat sealing device for a packaging machine, including a forming wheel 1 that rotates around a main shaft. A processing groove 11 is formed on the outer circumference of the forming wheel 1, and a cigarette box 2 is placed in the processing groove 11. A pressure plate 3 abuts against one side of the forming wheel 1, and the pressure plate 3 presses a transparent paper film. The pressure plate 3 is arc-shaped and has an opening 31. The inner wall of the opening 31 abuts against a hot press head 4. A first connecting part 5 is installed on the upper side of the hot press head 4. A first sliding hole is opened on the upper side of the first connecting part 5. The first sliding hole is elongated and a first guide rod 6 passes through the first sliding hole. The two ends of the first guide rod 6 are connected to a connecting part 7. The connecting part 7 is connected to an auxiliary shaft 8. The auxiliary shaft 8 drives the connecting part 7 to rotate. The axes of the auxiliary shaft 8, the main shaft, and the first guide rod 6 are parallel to each other.

[0023] The forming wheel 1 has six sets of processing grooves 11 arranged circumferentially, and a cigarette box 2 is placed in each set of processing grooves 11. During the hot pressing process, the forming wheel 1 rotates the cigarette box 2 to be hot pressed to the first station in sequence to cut the transparent paper film. Then the forming wheel 1 rotates the cigarette box 2 to the second station and the third station to heat seal the transparent paper film. A pressure plate 3 is provided on one side of the second station and the third station to press the transparent paper film to keep it flat. Then the auxiliary shaft 8 rotates, driving the adapter 7 to rotate. The adapter 7 drives the hot pressing head 4 to rotate, so that the hot pressing head 4 is inserted into the opening 31. When the hot pressing head 4 moves down along the opening 31, the first guide rod 6 moves along the first The sliding hole slides towards the side closer to the auxiliary shaft 8. As the hot pressing head 4 moves upward along the opening 31, the first guide rod 6 slides away from the auxiliary shaft 8 along the first sliding hole. Through the relative movement between the first guide rod 6 and the first connecting part 5, the hot pressing head 4 always moves vertically up and down perpendicular to the opening 31, so that the contact surface on the lower side of the hot pressing head 4 is always parallel to the side of the cigarette box 2 that is being hot-pressed, resulting in a larger contact area and a better final hot pressing effect. At the same time, since the hot pressing head 4 can move vertically in the height direction of the opening 31, the area of ​​the opening 31 can be made smaller, and the side wall of the opening 31 can fit with the side wall of the hot pressing head 4, reducing the exposed transparent paper film area and making the final hot pressing effect of the cigarette box 2 better.

[0024] The hot press head 4 includes a guide member 41 and an electric heating element 42. The lower surface of the electric heating element 42 is the contact surface. The guide member 41 has a first through hole 411, and the electric heating element 42 has a first stud 421 on its upper side. The first stud 421 passes through the first through hole 411, and a first nut is screwed onto the first stud 421. The first nut abuts against the guide member 41. The area of ​​the guide member 41 is larger than that of the electric heating element 42, and the guide member 41 abuts against the inner wall of the opening 31 circumferentially. The guide member 41 can cooperate with the opening 31 to realize the insertion of the hot press head 4. By changing the position of the first through hole 411, the installation position of the electric heating element 42 can be changed, and thus the heating position of the electric heating element 42 can be changed. At the same time, by replacing the guide member 41 with different thicknesses, the pressing force of the electric heating element 42 can be adjusted. The thicker the guide member 41, the greater the pressing force of the electric heating element 42.

[0025] The guide component 41 used in this utility model is made of copper. Since the pressure plate 3 is made of iron, and copper has a low hardness, when the guide component 41 collides with the pressure plate 3, the guide component 41 is relatively soft and will not damage the structure of the pressure plate 3, thus protecting the pressure plate 3.

[0026] A heat insulation sheet 43 is sandwiched between the guide member 41 and the electric heating element 42. A sleeve 431 is formed on the heat insulation sheet 43, and a first stud 421 passes through the sleeve 431. The sleeve 431 is inserted into the first through hole 411. The heat insulation sheet 43 can prevent the heat generated by the electric heating element 42 from being transferred to the guide member 41, thus preventing the guide member 41 from deforming. Since the area of ​​the opening 31 is close to the area and shape of the guide member 41, the heat insulation sheet 43 can prevent the guide member 41 from deforming, and thus ensure that the guide member 41 is always inserted into the opening 31.

[0027] A guide portion 12 is formed on the circumferential protrusion of the opening 31 on the outer side of the pressure plate 3. A guide groove is formed in the guide portion 12. The guide groove is located on one side of the opening 31 and has a chamfer. By setting the chamfer, the area on the upper side of the opening 31 can be enlarged, which facilitates the hot press head 4 to press. When the edge of the hot iron 42 contacts the chamfer, it will slide into the opening 31 along the inclined surface.

[0028] The first connecting part 5 of this utility model is screwed into the guide member 41 for easy disassembly and maintenance later. The adapter part 7 includes an adapter bracket 71, a second connecting part 72, and a second guide rod 73. A second sliding hole is formed on the second connecting part 72, and the second guide rod 73 is inserted into the second sliding hole. The second connecting part 72 is screwed onto the auxiliary shaft 8. The adapter bracket 71 is H-shaped and includes ribs 711 with gaps between them. The first connecting part 5 and the second connecting part are inserted into the gaps. Fixed screw holes are symmetrically formed at both ends of the ribs 711. The first guide rod 6 and the second guide rod 73 are screwed into the fixed screw holes and are parallel to each other.

[0029] The first guide rod 6 can rotate and move along its length within the first sliding hole, with the length direction tangent to the arc surface of the pressure plate 3. The second guide rod 73 can be fastened to the adapter bracket 71, allowing the auxiliary shaft 8 to directly drive the first connecting part 5 to move along the height direction of the opening 31. Simultaneously, the second sliding hole can also be elongated, giving the adapter part 7 greater freedom. When the second sliding hole is elongated, the adapter bracket 71 can rotate freely relative to the first connecting part 5 and the second connecting part 72. This also shortens the length of the first sliding hole. After the auxiliary shaft 8 rotates and the second guide rod 73 moves linearly to its limit position within the second sliding hole, the auxiliary shaft 8 can continue to rotate, allowing the first guide rod 6 to continue moving linearly to its limit position within the first sliding hole. This increases the distance the hot press head 4 can move within the opening 31, ensuring that the hot press head 4 always moves perpendicular to the height direction of the opening 31.

[0030] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A heat sealing device for a packaging machine, characterized in that, The device includes a forming wheel (1) that rotates around a main shaft. A processing groove (11) is formed on the outer circumference of the forming wheel (1). A cigarette box (2) is placed inside the processing groove (11). A pressure plate (3) abuts against one side of the forming wheel (1). The pressure plate (3) presses a transparent paper film against the plate. The pressure plate (3) is arc-shaped and has an opening (31). The inner wall of the opening (31) abuts against a hot press head (4). The upper side of the hot press head (4)... A first connecting part (5) is installed, and a first sliding hole is provided on the upper side of the first connecting part (5). The first sliding hole is elongated, and a first guide rod (6) is inserted in the first sliding hole. The two ends of the first guide rod (6) are connected to the adapter part (7). The adapter part (7) is connected to the auxiliary shaft (8). The auxiliary shaft (8) drives the adapter part (7) to rotate. The axes of the auxiliary shaft (8), the main shaft and the first guide rod (6) are parallel to each other.

2. The heat sealing device for a packaging machine according to claim 1, characterized in that, The hot press head (4) includes a guide (41) and an electric heating element (42). The guide (41) has a first through hole (411). The electric heating element (42) has a first stud (421) on its upper side. The first stud (421) passes through the first through hole (411). A first nut is screwed onto the first stud (421). The first nut abuts against the guide (41). The area of ​​the guide (41) is larger than that of the electric heating element (42). The guide (41) abuts against the inner wall of the opening (31) in the circumferential direction.

3. The heat sealing device for a packaging machine according to claim 2, characterized in that, The guide component (41) is made of copper.

4. The heat sealing device for a packaging machine according to claim 2, characterized in that, A heat insulation sheet (43) is sandwiched between the guide (41) and the electric heating element (42). A sleeve (431) is formed on the heat insulation sheet (43). The first stud (421) passes through the sleeve (431), and the sleeve (431) is inserted into the first through hole (411).

5. The heat sealing device for a packaging machine according to claim 1, characterized in that, A guide portion (12) is formed on the circumferential protrusion of the opening (31) on the outside of the pressure plate (3). A guide groove is provided in the guide portion (12), and a chamfer is formed on one side of the opening (31).

6. The heat sealing device for a packaging machine according to claim 2, characterized in that, The first connecting part (5) is screwed into the guide (41).

7. The heat sealing device for a packaging machine according to claim 1, characterized in that, The adapter (7) includes an adapter bracket (71), a second connecting part (72), and a second guide rod (73). A second sliding hole is formed on the second connecting part (72), and the second guide rod (73) is inserted into the second sliding hole. The second connecting part (72) is screwed onto the auxiliary shaft (8). The adapter bracket (71) is H-shaped and includes ribs (711). A gap is formed between the ribs (711). The first connecting part (5) and the second connecting part (72) are inserted into the gap. Fixed screw holes are symmetrically formed at both ends of the ribs (711). The first guide rod (6) and the second guide rod (73) are screwed into the fixed screw holes. The first guide rod (6) and the second guide rod (73) are parallel.

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