Sealing machine for cans with locking lids

Abstract

Sealing machine for cans with locking lids, including: a machine housing equipped with a conveyor belt, the conveyor belt serving to transport container cans with an upper rim area on the outer edge of which an external thread is provided; a machine base is provided at a position corresponding to the conveyor belt, in which an inner wall is formed; A lid feed cylinder arranged on the machine housing, which has a feed chamber for receiving multiple lids, wherein the inner edge of the lid is provided with an internal thread matching the external thread of the can; a discharge chute with a slide rail located therein is provided on one side of the lid feed cylinder; the lid feed cylinder uses an inclined, vibratory lid arrangement structure for orderly alignment of the lids; A lid alignment unit mounted on the machine housing and connected to the slide rail for transporting the lids; the lid alignment unit has a flipping and flattening function so that the lids are transported with the top side facing upwards; the unit comprises a base with a rail and a lid positioned above it, with a height adjustment module for adjusting the height distance between the base and the lid, and a width adjustment module for adjusting the rail width within the rail; a mounting part is located at one end; A lid guide unit, which is assigned to the machine housing and the conveyor belt and is connected to the lid alignment unit, to temporarily position the lids in an inclined state at the edge of the can opening without completely closing them; the unit comprises a base element with a mounting end that is attached to the mounting part; an upper rail with a first and a second guide surface is attached to this; on both sides are front rail boxes with several connecting holes for receiving the guide rods and locking areas for mounting lateral rail elements; lateral rail sections are formed at the lower ends of these; One end of the lid guide unit is equipped with a spring-loaded pull rod, a lid rail is located on the underside, and a guide inlet opening is at the end; an adjustment hole with a fixed adjusting nut and attachable adjustment knob is provided on the side; the unit offers a simple guiding and positioning function to ensure the coaxial alignment of the lid and can; a steam guide seat located at the rear of the machine base and connected to a steam guide channel at a position corresponding to the cover guide unit; a vacuum sterilization unit with a high-temperature air supply pipe, which has an air supply end connected to the steam guide seat; this is connected to the steam guide channel, so that the hot gas introduced via the channel enters the area of ​​the lid guide unit and penetrates further into the upper edge area of ​​the can to displace the cold internal air and effect vacuum sterilization; a sealing unit, which is attached to the machine housing and the conveyor belt and connected to the lid guide unit; it comprises a first and a second press arm, the first arm being provided with a first press plate, swivel unit and an inclined press surface at an angle of 10 to 20 degrees, and the second arm with a second press plate, swivel unit and a horizontal press surface; these serve to press the can and lid together; a tightening unit positioned in the machine base behind the sealing unit, comprising a drive wheel and a trailing belt assembly, both of which are equipped with a first and a second belt with a length ratio of 1:1.5, resulting in different belt speeds; when the can is passed under the belts, the friction of the two belts on the lid surface generates a torque which screws the lid into the external thread of the can, thus creating a tight screw connection; a control unit that is mounted on the machine base and electrically connected to the lid feed cylinder, the lid alignment unit, the lid guide unit, the vacuum sterilization unit, the sealing unit and the tightening unit to control their operation and switching on and off.

Description

Field of invention

[0001] The present utility model relates to a sealing machine for cans with a locking lid, in particular a machine that can be used in the food, beverage or canning industry, which, through a modular structure with division of labor functionality - consisting of lid feeding, guiding, vacuum sterilization, pressing and screwing - enables linear and automated packaging of the lid with the container. State of the art

[0002] In current beverage, food, and canning industries, various types of containers, such as glass, plastic, or metal, are commonly used for filling and packaging. When sealing these containers, it is standard practice to place pre-made lids onto the openings and tighten them to ensure the shelf life of the contents and prevent contamination. Conventional capping machines typically employ simple mechanical press mechanisms to first press the lid onto the container opening and then screw it on by rotation or friction. However, such designs often suffer from the following disadvantages: Blockages can easily occur during conveying or guiding due to incorrect alignment or position of the lid, leading to production line downtime.The pressing and screwing units are usually rigid and not adjustable, meaning that when changing to different container sizes or shapes, components or entire modules have to be replaced, leading to increased production costs and downtime. Furthermore, many devices lack vacuum sterilization capabilities, resulting only in a physical seal, which reduces the product's shelf life. Current screwing systems are mostly based on a single belt or rotary drive, with inadequate torque control. This often leads to insufficient or excessive tightening, resulting in leaks or damage to the lid threads.

[0003] Furthermore, while some sealing machine types do have a steam sterilization function, the efficiency of the steam injection is often insufficient. This easily leads to the formation of condensation residue, which not only impairs sterilization but can also lead to excessive moisture in the container and thus negatively affect product quality.

[0004] Therefore, there is an urgent need for improvement in the state of the art in order to provide a device that: 1) enables stable feeding and alignment of closure lids; 2) ensures precise guidance of the lids in accordance with the containers; 3) vacuum sterilization is achieved by introducing steam; 4) has a multi-stage pressing and torque-generating friction structure with speed differential to ensure that the lid is reliably screwed into the external thread and tightly sealed; 5) and can be adapted to different container sizes through easily adaptable structures to increase the flexibility and efficiency of the production line.

[0005] The present utility model provides a “sealing machine for cans with locking lids” which, through a modular design and a multi-stage sealing system, overcomes the existing shortcomings of conventional devices with regard to conveying stability, efficiency of vacuum sterilization, accuracy in screwing and ease of adjustability. Object of the invention

[0006] The utility model-compliant capping machine for cans with closure lids essentially comprises: a lid feed cylinder for receiving and sequentially supplying closure lids; a lid alignment unit with an erection structure and adjustable width and height to ensure stable conveying of lids of different sizes; a lid guide unit located above the conveyor belt that guides the lids to the opening of the container can and temporarily positions them there; a vacuum sterilization unit that directs high-temperature steam into the container interior via a steam guide seat, removes cold air, and creates a vacuum environment for sterilization; and a sealing unit that uses several pressure arms with inclined and horizontal pressure surfaces to gradually press the lid onto the container to establish an initial seal.as well as a tightening unit which generates a frictional force by means of two belts running at different speeds, thereby applying a suitable torque to screw the lid into the external thread of the container and complete the seal.

[0007] The present utility model enables the following technical effects simultaneously: Stable lid feeding and erection: The lids are fed sequentially from the lid feeding cylinder and brought into a uniform position by an erection unit, ensuring they are correctly aligned with the can opening and preventing jamming and misalignment. Multi-format compatibility: The lid erection unit is equipped with a height and width adjustment module, enabling quick changeovers between different lid formats and reducing the need for module changes. High vacuum sterilization efficiency: The steam is directed into the container interior via a guide channel, effectively removing cold air and achieving high-temperature sterilization – thus ensuring the quality of the preservation.Segmented Press Structure: The first and second press arms feature angled and horizontal pressing surfaces, enabling gradual and even pressing of the lids and preventing tilting or deformation. Differential Tightening Unit: The tightening unit utilizes two belts running at different speeds to generate a frictional torque that precisely screws the lid into the external thread, preventing both under- and over-tightening. Easy Adjustability: The tension and height of the belts can be quickly adjusted via a height-adjustable bracket and positioning unit, improving ease of maintenance and operation. Energy Recovery: The vacuum sterilization unit is equipped with return and hot water circuits that reuse the condensate, thus increasing overall energy efficiency.

[0008] In summary, the present utility model, through a multi-stage sealing process, not only significantly increases the efficiency and reliability of automated sealing processes, but also simultaneously ensures sterilization, vacuum formation, and sealing. Furthermore, it offers a high degree of adjustability and is therefore suitable for widespread use in packaging lines for various types of food, beverages, and preserved products. Brief description of the drawings Fig. Figure 1 is a perspective view of the machine housing of the sealing machine for cans with closure lids according to the present utility models. Fig. Figure 2 shows a perspective view of the combination of the slide rail of the lid feed cylinder, the lid alignment unit and the lid guide unit according to the utility models. Fig. Figure 3 shows a perspective view of the combination of the lid alignment unit and the lid guide unit according to the utility models. Fig. Figure 4 shows an exploded view of the lid alignment unit and the lid guidance unit according to the utility models. Fig. Figure 5 shows a perspective view of the sealing unit according to the utility model. Fig. Figure 6 shows a side view of the lid guide unit according to the utility model. Fig. Figure 7 shows a front view of the lid guide unit according to the utility model. Fig. Figure 8 shows a side view of the sealing unit according to the utility model. Fig. Figure 9 shows a perspective partial view of the vacuum sterilization unit according to Fig. 1. Fig. Figure 10 shows a perspective view of the vacuum sterilization unit of the utility model sealing machine for cans with locking lids. Fig. Figure 11 shows another perspective view of the vacuum sterilization unit of the utility model sealing machine for cans with locking lids. Fig. Figure 12 shows a schematic representation in which the drain pipe of the vacuum sterilization unit of the utility model sealing machine for cans with lids is connected to a hot water circulation line, which is directed into a hot water storage tank and subsequently coupled in a circuit with a return storage tank and a steam boiler. Fig. Figure 13 shows a perspective view of the arrangement of the pulling unit relative to the machine housing of the utility model closing machine for cans with closure lids. Fig. Figure 14 shows a perspective view of the assembled tightening unit of the utility model sealing machine for cans with locking lids. Fig. Figure 15 shows an exploded view of the tightening unit of the utility model sealing machine for cans with locking lids. Fig. Figure 16 shows an embodiment view in which the vacuum sterilization unit, together with the lid guide unit, acts on a container to be sterilized, according to the utility model sealing machine for cans with locking lids. Fig. Figure 17 shows an enlarged partial view in which the vacuum sterilization unit, together with the lid guide unit, acts on a container to be sterilized, according to the utility model sealing machine for cans with locking lids. Fig. Figure 18 shows a rear view of the interface between the lid alignment unit and the lid guidance unit and an associated container according to the utility model sealing machine for cans with closure lids. Fig. Figure 19 shows an embodiment view in which the lid is sealed on the container by means of the first pressing surface, according to the utility model sealing machine for cans with locking lids. Fig. Figure 20 shows an embodiment view in which the lid is sealed on the container by means of the second pressing surface, according to the utility model sealing machine for cans with locking lids. Fig. Figure 21 shows a front view of the tightening unit of the utility model sealing machine for cans with locking lids. Fig. Figure 22 shows a perspective view of the pulling unit from a further angle according to the utility model closing machine for cans with closure lids. Fig. Figure 23 shows an embodiment of the pulling unit acting on a lid and a container, according to the utility model sealing machine for cans with a locking lid. Fig. Figure 24 shows a first schematic representation of the operation of the tightening unit, showing a state in which the lid is not yet screwed onto the container, according to the utility model sealing machine for cans with locking lids. Fig. Figure 25 shows a second schematic representation of the operation of the tightening unit, showing a state in which the lid is screwed onto the container, according to the utility model sealing machine for cans with locking lids. Detailed description of the exemplary implementations

[0009] Referring to the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15, Fig. 16, Fig. 17, Fig. 18, Fig. 19, Fig. 20, Fig. 21, Fig. 22, Fig. 23, Fig. 24 to Fig. 25 The utility model can sealing machine essentially comprises: a machine housing A, a lid feed cylinder 10, a lid alignment unit 20, a lid guide unit 30, a vacuum sterilization unit B, a steam guide seat A2, a sealing unit 40, a tightening unit D, a control unit C and associated auxiliary and additional modules.

[0010] A conveyor belt G is mounted on the machine housing A, serving to convey cans S1 to be sealed. An external thread S13 is provided on the outer circumferential surface of the upper rim S12 of the can S1. A machine base A1 is installed on the housing A in the conveyor belt position, with an inner wall A4 formed inside the base. A steam guide seat A2 extends along the rear of the base and is equipped with a steam guide channel A3 to facilitate vacuum sterilization. Support belts K can be additionally attached to both sides of the conveyor belt G to prevent the cans S1 from wobbling during transport.

[0011] The lid feed cylinder 10 is attached to the machine housing A and forms an internal feed chamber 12 that can accommodate several lids S2. An internal thread S21 is formed on the inner edge of the lid S2, which corresponds to the external thread S13 of the can S1. A discharge chute 11 is provided on one side of the feed cylinder 10, inside which a guide rail 13 is arranged so that the lids S2 can slide down and be conveyed sequentially. The feed cylinder 10 uses an inclined vibratory structure for lid alignment, in which vibration aligns the lids S2 in an orderly manner and prevents jamming.

[0012] The lid alignment unit 20 is connected to the slide rail 13 and serves to receive and transport the lids S2. It has functions for erecting and flattening the lids S2 so that they are transported with their tops facing upwards. It comprises a base 21 on which a rail 211 is mounted. The width of the rail can be adjusted via a width adjustment module 25. This module 25 includes a width adjustment knob 251, which drives a left-hand rotating spindle 253 and moves two sliders 252 towards the center of the rail or outwards to change the passage width of the lids S2. A lid 24 is provided above the base 21, the height of which relative to the base 21 is controlled by a height adjustment module 22.Module 22 includes a height adjustment knob 221, which drives a first bevel gear 222 and a second bevel gear 223 to move a rack 23 vertically, allowing the cover 24 to be moved up and down to accommodate covers S2 of different heights or thicknesses. At the end of the cover alignment unit 20 is a mounting section 26 for attaching the subsequent cover guide unit 30.

[0013] The lid guide unit 30 is connected to the lid alignment unit 20 and is located above the conveyor belt G. Its function is to guide the lids S2 in an inclined position towards the upper edge region S12 of the opening of the can S1. It enables easy alignment and positioning, so that both components are coaxially aligned and temporarily hooked together to prevent slippage.

[0014] The lid guide unit 30 comprises a base element 31 with a mounting end 32 that can be connected to the mounting part 26. An upper rail 35 is formed on the base element 31, forming a first guide surface 351 and a second guide surface 352, which guide the lids S2 smoothly into the external thread S13 of the can S1. On both sides of the upper rail 35 are front rail boxes 36, each containing several connecting holes 37 for the optional mounting of the first guide rod 33 and the second guide rod 34. In addition, a locking area 38 is formed on the rail box 36, which can accommodate the locking hole 392 of the side rail element 39. A side rail section 391 projects from the lower edge of the rail box 36 to reinforce the positioning of the lids S2 and limit their deviation.

[0015] Additionally, a lid guide rail 304 is provided on the underside of the lid guide unit 30, the end of which has a guide inlet opening 301 to facilitate the insertion of the lid S2 into the opening of the can S1. An adjustment hole 29 is located on one side, in which an adjustment nut 28 is permanently installed. Fine adjustment to improve the lid-can alignment can be made via an adjustment knob 27. A pull rod 303 and a pull rod spring 302 are attached to the front of the base element 31, providing an elastic restoring effect and cushioning the insertion of the lid S2. A lid guide rail 304 is formed on the underside, at the end of which is a guide inlet opening 301 to precisely engage the external thread S13 of the can S1.

[0016] A vacuum sterilization unit B is arranged behind the steam control seat A2 and comprises a compressed air cylinder 10A, a steam supply line 20A, a return line 16A and associated valve units.

[0017] An air inlet pipe 11A is attached to the upper end of the pneumatic cylinder 10A. This pipe can be connected to a steam boiler 40A to provide a high-temperature steam source. A main pipe 12A and a branch pipe 15A are provided at the lower end of the pneumatic cylinder 10A. The main pipe 12A is connected to an air valve 13A, at one end of which an air pressure gauge 14A is arranged to monitor the internal pressure. The branch pipe 15A is connected to a return line 16A, which is equipped with a condensate separator valve 17A and extends to an outlet pipe 18A. The other end of the air valve 13A is connected to the steam supply line 20A. A cross-shaped distribution pipe 21A is integrated into the steam supply line 20A, which is connected on one side to a guide valve switch 22A, to which a guide pressure gauge 23A is connected.The other side is equipped with a thermometer 24A to monitor the steam flow. A steam inlet valve 25A is also provided at the lower end of the distribution pipe 21A, which is connected to a high-temperature steam duct component 26A and feeds steam into the steam duct A3 via its steam outlet 27A.

[0018] The return line 16A and the outlet pipe 18A can be connected to a hot water circuit line B2, which leads into a hot water storage tank B1. The hot water storage tank B1 is further connected in a circuit to a return tank 30A and the steam boiler 40A to cool and descale the steam supply and to recover the circulating water. This creates a recovery system to improve energy efficiency.

[0019] The steam inlet valve 25A controls the high-temperature steam line component 26A and directs the steam into the steam guide channel A3 via its outlet 27A. From there, the steam is directed to the area of ​​the lid guide unit 30 and injected into the can S1 to displace the cold air inside the container with hot steam and thus achieve vacuum sterilization.

[0020] A sealing unit 40 is arranged behind the lid guide unit 30 and corresponding to the position of the conveyor belt G, and is connected to the lid guide unit 30. The sealing unit 40 comprises a first press arm 41 and a second press arm 45.

[0021] A first pressing plate 42 is arranged at the lower end of the first pressing arm 41. This first pressing plate 42 is pivotally connected to the end of the first pressing arm 41 via a first pivoting element 43. A first pressing surface 44 with an angle of inclination of 10 to 20 degrees is formed on the underside of the first pressing plate 42, serving for the preliminary pressing of the lid S2. A second pressing plate 46 is provided at the lower end of the second pressing arm 45. This second pressing plate 46 is pivotally connected to the end of the second pressing arm 45 via a second pivoting element 47. A second pressing surface 48 with a horizontal angle is formed on the underside of the second pressing plate 46, serving for the final sealing, so that the lid S2 is firmly connected to the can S1.

[0022] When the can S1 is on the conveyor belt G and passes the lid guide unit 30, the lid S2 is positioned over the guide inlet opening 301 in relation to the external thread S13. Subsequently, the first pressing surface 44 and the second pressing surface 48 of the sealing unit 40 act sequentially to perform an initial angled press followed by a final horizontal press, thus securely screwing the lid S2 onto the can S1 and completing the sealing process. The aforementioned units can be adapted to different lids S2 using the height adjustment module 22 and the width adjustment module 25. The multi-stage guide system of the lid guide unit 30 ensures precise alignment of the lid S2 with the external thread S13 of the can S1.The segmented pressing by the sealing unit 40 enables a smooth and stable sealing process, which significantly improves the efficiency and quality of the automated sealing.

[0023] In the described operating process, several cans S1 are continuously conveyed via the conveyor belt G, while simultaneously several lids S2 are provided from the lid feed cylinder 10. These are guided via the output chute 11 and the guide rail 13 and enter the lid alignment unit 20 sequentially. After alignment and positioning, the lids S2 proceed to the lid guide unit 30, where they are brought into position on the conveyor belt G with the approaching cans S1, so that each lid S2 is connected to the corresponding external thread S13 of a can S1.

[0024] As the lid S2 enters the lid guide unit 30, the first guide surface 351 of the upper rail 35, with its inclined shape, acts upon the lid S2 to guide it at an angle and gradually bring it into an alignment position with the external thread S13 of the can S1. Simultaneously, the second guide surface 352 of the upper rail 35 is connected to the subsequent lid S2, thus creating continuous guidance and bringing the next lid S2 into the preparation position for further configuration.

[0025] As the lid S2 enters the lid guide unit 30, it is supported and guided on both sides by the lateral rail sections 391, which are located at the lower edge of the front rail boxes 36, to prevent slippage during insertion. Simultaneously, the top of the lid S2 is guided by the first and second guide surfaces 351 and 352 of the upper rail 35, thus achieving complete positioning of the top and side surfaces of the lid S2. If necessary, the user can adjust the angle of the lid guide unit 30 to create a suitable tilt configuration between the lid S2 and the can S1, which facilitates subsequent sealing.

[0026] Once the lid S2 is connected to the external thread S13 of the container S1, an initial compression is applied by the first pressing surface 44 of the sealing unit 40. The first pressing surface 44 has an inclination of approximately 10 to 20 degrees and allows for a gradual connection between the lid S2 and the container S1, thus achieving initial fixation. Subsequently, the lid S2 is fully pressed horizontally by the second pressing surface 48, resulting in a complete and stable seal between the lid S2 and the container S1 and thus improving the sealing quality and reliability of the closure.

[0027] A tightening unit D is arranged downstream of the sealing unit 40 in the process sequence. The tightening unit D comprises a drive wheel 10B and a driven wheel assembly 20B. The drive shaft 13B of the drive wheel 10B is supported at one end against the inner wall A4 of the machine base A1 (possibly via a bearing assembly, not shown), while at the other end a first wheel element 11B and a second wheel element 12B are mounted, the second wheel element 12B having a slightly larger diameter than the first wheel element 11B. The first wheel element 11B is surrounded by a first belt 80B, and the second wheel element 12B by a second belt 70B. Due to the different diameters of the two wheels and a fixed belt length ratio of approximately 1:1.5, a difference in line speed arises between the two belts with the same drive.

[0028] Preferably, the first line speed SP1 of the first belt 80B is set in the range of 1.0 m / s to 1.5 m / s, while the second line speed SP2 of the second belt 70B is regulated in the range of 0.6 m / s to 1.0 m / s. The differential speed is preferably in the range of 0.2 m / s to 0.5 m / s to generate sufficient tightening torque without causing over-tightening of the thread or tipping of the container.

[0029] The outer layers of the first belt 80B and the second belt 70B are each coated with an elastic friction layer 81B and 71B, respectively, the material of which is preferably NBR, EPDM, or PU (polyurethane). The preferred layer thickness is approximately 1.5 to 3.0 mm, and the Shore A hardness is approximately 60 to 85. The combination of the speed difference and the friction layer generates a torque of approximately 0.3 to 0.6 N·m at the top of the container lid S2 to ensure stable tightening and prevent deformation of the lid S2.

[0030] The output gear assembly 20B comprises a first gear unit 21B and a second gear unit 22B. The first gear unit 21B has a first frame 211B in which a first axle 212B is rotatably mounted, and a first guide wheel 213B is mounted on it. At the lower end of the first frame 211B, a connecting support 214B is provided, the underside of which forms a first pivot base 216B with a first pivot hole 217B. The second gear unit 22B has a second support frame 221B with a second frame 222B attached to it. In the second frame 222B, a second axle 223B is rotatably mounted, and a second guide wheel 224B is mounted on it. At the lower end of the support frame 221B, a second pivot base 226B with a second pivot hole 227B is formed.The path of the first belt 80B is preferably defined by the first wheel element 11B of the drive wheel 10B, the first guide wheel 213B, and the lower sliding surface 34B on one side of the height adjustment bracket 30B. The path of the second belt 70B is determined by the second wheel element 12B of the drive wheel 10B, the second guide wheel 224B, and the opposite lower sliding surface 34B of the height adjustment bracket 30B. To prevent lateral deviations of the belts 80B and 70B, lateral guide edges 35B are formed on both sides of the lower sliding surface 34B as limits.

[0031] The first wheel unit 21B and the second wheel unit 22B are each mounted on the height adjustment bracket 30B, which has two adjacent suspensions 31B. These have suspension openings 32B. One end forms a guide point 33B for aligning the entry / exit of the belt guide, while the other end has a swivel connection element 36B. The swivel connection element 36B is connected to the first swivel base 216B and the second swivel base 226B, respectively. A third guide wheel 37B is arranged between the first swivel base 216B and the swivel connection element 36B, and a fourth guide wheel 38B is arranged between the second swivel base 226B and the swivel connection element 36B. These serve to optimize the wrap angle and the entry angle of the belts 80B and 70B.

[0032] The two suspensions 31B of the height adjustment bracket 30B are each held by a suspension device 40B. Each of these suspension devices has a receiving seat 41B with a mounting opening 42B and is pivotally connected to the suspension openings 32B of the height adjustment bracket 30B via a locking pin 39B, so that the bracket can be raised and lowered synchronously with the suspension device 40B. Both suspension devices 40B are mounted on the support frame H1. A height adjustment knob H is located on the top of the support frame H1 and is mechanically connected to a worm gear H2. The worm gear H2 drives a deflection shaft H3, which in turn drives the sprocket drive H4. The sprocket drive H4 transmits the movement to the first chain H5 and the second chain H7. The chain ends engage with the first sprocket H6 and the second sprocket H8, which are firmly mounted on the two suspension devices 40B.By pressing the height adjustment knob H, a synchronous height adjustment of both sides can be carried out in order to precisely adjust the height of the belts 80B and 70B relative to the conveyor belt G to the height of different cans S1 and lids S2.

[0033] For quick tension adjustment of the belts 80B and 70B, a first swivel arm 215B is provided on the connecting support 214B of the first wheel unit 21B, and a second swivel arm 225B is provided on the support frame 221B of the second wheel unit 22B. A fixing bolt 60B and a fixed bearing 61B are attached to the inner wall A4 of the machine base A1. The two swivel arms 215B and 225B are each pivotally connected to a tension adjustment frame 50B. The tension adjustment frame 50B has a pivoting end 51B with a pivoting part 52B and a pivot hole 53B, which is connected to the corresponding swivel arm via a positioning pin 54B. The other end of the pivoting part 51B is connected to a telescopic frame 55B in which a guide column 56B is slidably mounted. An elastic element 57B in the form of a compression spring is attached between the guide column 56B and the telescopic frame 55B.At the end of the guide column 56B, a multi-stage positioning element 58B is formed, the side edge of which has several evenly spaced locking grooves 59B. The operator can engage a desired locking groove 59B in the fixing bolt 60B to obtain different pretension positions. The combination of telescopic frame 55B, guide column 56B, and elastic element 57B allows for quick fine adjustment of the tension force of the belts 80B and 70B without the need for disassembly – thus compensating for wear or temperature-related elongation.

[0034] A cooling line 90B is installed in the machine base A1. A fine mist nozzle (not shown) is located above the contact area of ​​belts 80B and 70B. This nozzle applies a water mist to the belts, either time-controlled or temperature-controlled, to prevent overheating due to friction. This prevents the friction layer from softening or the covers from deforming due to heat. In practice, the control unit C can activate the misting function according to the production cycle or the surface temperature of belts 80B and 70B (measured by infrared). The wastewater is directed into a collection tray in the machine housing.

[0035] Preferably, the belts 80B and 70B are made of canvas-reinforced PU or rubber. The preferred width is 20–40 mm, and the thickness is 3–6 mm. The elastic friction layer 81B or 71B has a preferred thickness of 1.5–3.0 mm. The wheel elements 11B, 12B, 213B, 224B, 37B, and 38B are preferably made of aluminum alloy or surface-hardened 45# steel. The running surfaces can be provided with fine transverse structures to increase the coefficient of friction between the belt and the wheel. The support frame H1 is preferably made of stainless steel (SUS304) or powder-coated carbon steel. The worm gear H2 has a preferred gear ratio of 30:1 to 60:1 to allow for precise height adjustment.

[0036] The control unit C integrates the modules described above. It is installed on the machine base A1 and electrically connected to the lid feed cylinder 10, the lid alignment unit 20, the lid guide unit 30, the vacuum sterilization unit B, the sealing unit 40, and the tightening unit D. The control unit C is able to control the inputs / outputs and the operating sequence of the aforementioned units, thus enabling automated operation.

[0037] The present utility model provides an air-purifying adhesive plate structure, comprising primarily a metal protective layer, a design printing layer, a micrometer-scale energy coating with multiple light-energy-generating magnesium ions, multiple purifying negative oxygen factors, and multiple silver ions, a high-polymer adhesive layer with multiple far-infrared negative ions, a backing adhesive layer, and a release paper. In this way, the light-energy-generating magnesium ions, the purifying negative oxygen factors, and the silver ions, in the present invention, produce additive effects through mutual division of labor without increasing electricity costs. By simply attaching the plate to an air conditioner or fan and using the original air distribution device in combination with the present invention, the air can be purified and have an antibacterial effect.When bacteria and viruses circulate in the air, they are broken down and inhibited by the cleaning molecules of the utility model adhesive plate body, allowing the air to circulate while simultaneously achieving air purification and antiviral effects. Reference symbol list A machine housing A1 machine base A2 Steam guide seat A3 Steam duct A4 interior wall B Vacuum sterilization unit B1 Hot water storage tank B2 Hot water circuit pipe C control unit D dressing unit S1 can S12 upper edge area S13 external thread S2 lid S21 internal thread G Conveyor belt K support straps SP1 first line speed SP2 second line speed 10 lid feed cylinders 11 output chute 12 Feed chamber 13 Slide rail 20 Lid alignment unit 21 sockets 211 Rail 22 Height adjustment module 221 Height adjustment knob 222 first bevel gear 223 second bevel gear 23 Rack and pinion 24 lids 25 Width adjustment module 251 Width adjustment knob 252 slides 253 left-hand rotating spindle 26 Mounting part 27 Adjustment knob 28 Adjusting nut 29 Adjustment holes 30 Lid guide unit 31 Basic element 32 End of assembly 33 first guide rod 34 second guide rod 35 upper rail 351 first guide surface 352 second guide surface 36 front rail box 37 connecting holes 38 Locking area 39 lateral rail element 391 lateral rail section 392 Locking hole 301 Guide entrance 302 Tie rod spring 303 Pull rod 304 Cover rail 40 sealing units 41 first press arm 42 first press plate 43 first pivot link 44 first pressing surface 45 second press arm 46 second press plate 47 second pivot link 48 second pressing surface 70B second belt 80B first belt 71B elastic friction layer 81B elastic friction layer 90B Cooling line H Height adjustment knob H1 support frame H2 worm gear H3 deflection axle H4 sprocket gearbox H5 first chain H6 first sprocket H7 second chain H8 second sprocket

Claims

[1] Sealing machine for cans with locking lids, comprising: a machine housing equipped with a conveyor belt, the conveyor belt serving to transport container cans with an upper rim area on the outer edge of which an external thread is provided; a machine base is provided at a position corresponding to the conveyor belt, in which an inner wall is formed; A lid feed cylinder arranged on the machine housing, which has a feed chamber for receiving multiple lids, wherein the inner edge of the lid is provided with an internal thread matching the external thread of the can; a discharge chute with a slide rail located therein is provided on one side of the lid feed cylinder; the lid feed cylinder uses an inclined, vibratory lid arrangement structure for orderly alignment of the lids; A lid alignment unit mounted on the machine housing and connected to the slide rail for transporting the lids; the lid alignment unit has a flipping and flattening function so that the lids are transported with the top side facing upwards; the unit comprises a base with a rail and a lid positioned above it, with a height adjustment module for adjusting the height distance between the base and the lid, and a width adjustment module for adjusting the rail width within the rail; a mounting part is located at one end; A lid guide unit, which is assigned to the machine housing and the conveyor belt and is connected to the lid alignment unit, to temporarily position the lids in an inclined state at the edge of the can opening without completely closing them; the unit comprises a base element with a mounting end that is attached to the mounting part; an upper rail with a first and a second guide surface is attached to this; on both sides are front rail boxes with several connecting holes for receiving the guide rods and locking areas for mounting lateral rail elements; lateral rail sections are formed at the lower ends of these; One end of the lid guide unit is equipped with a spring-loaded pull rod, a lid rail is located on the underside, and a guide inlet opening is at the end; an adjustment hole with a fixed adjusting nut and attachable adjustment knob is provided on the side; the unit offers a simple guiding and positioning function to ensure the coaxial alignment of the lid and can; a steam guide seat located at the rear of the machine base and connected to a steam guide channel at a position corresponding to the cover guide unit; a vacuum sterilization unit with a high-temperature air supply pipe, which has an air supply end connected to the steam guide seat; this is connected to the steam guide channel, so that the hot gas introduced via the channel enters the area of ​​the lid guide unit and penetrates further into the upper edge area of ​​the can to displace the cold internal air and effect vacuum sterilization; a sealing unit, which is attached to the machine housing and the conveyor belt and connected to the lid guide unit; it comprises a first and a second press arm, the first arm being provided with a first press plate, swivel unit and an inclined press surface at an angle of 10 to 20 degrees, and the second arm with a second press plate, swivel unit and a horizontal press surface; these serve to press the can and lid together; a tightening unit positioned in the machine base behind the sealing unit, comprising a drive wheel and a trailing belt assembly, both of which are equipped with a first and a second belt with a length ratio of 1:1.5, resulting in different belt speeds; when the can is passed under the belts, the friction of the two belts on the lid surface generates a torque which screws the lid into the external thread of the can, thus creating a tight screw connection; a control unit that is mounted on the machine base and electrically connected to the lid feed cylinder, the lid alignment unit, the lid guide unit, the vacuum sterilization unit, the sealing unit and the tightening unit to control their operation and switching on and off. [2] Sealing machine for cans with sealing lids according to claim 1, wherein the height adjustment module of the lid alignment unit includes a height adjustment knob, which can be actuated to rotate a first bevel gear, wherein the first bevel gear is engaged with a second bevel gear and the latter drives two racks in the longitudinal direction by its rotation, causing the upper cover to perform a vertical lifting movement; wherein the width adjustment module of the lid alignment unit includes a width adjustment knob which can drive a left- and right-handed spindle, the two ends of which each move a slider in opposite directions, so that the sliders extend or contract inwards or outwards along the rail to adjust the width of the rail. [3] Sealing machine for cans with sealing lids according to claim 1, wherein the vacuum sterilization unit further comprises: a pressurized gas cylinder which is equipped at its upper end with an inlet tube and at its lower end with a guide tube and a distribution tube; wherein the guide tube is connected to a gas valve part, one end of which is connected to a gas valve pressure gauge, and the distribution pipe is connected to a return water line, the return water line having a condensate valve, one end of which is connected to a drain pipe; the other end of the gas valve part is connected to a steam line, the steam line comprising a distribution pipe which is connected on one side to a guide switch, the guide switch being connected to a guide pressure gauge, the other side of the distribution pipe being connected to a thermometer, and the underside of the distribution pipe being provided with a gas switch, one end of which is connected to the high-temperature gas supply part. [4] Sealing machine for cans with a sealing lid according to claim 3, wherein the drain pipe is still connected to a hot water circulation line which is connected to a hot water storage tank, and the hot water storage tank is in turn connected to a return water storage tank in a circuit; Furthermore, the inlet pipe at the top of the pressurized gas cylinder is connected to a steam boiler. [5] Sealing machine for cans with a sealing lid according to claim 1, wherein the first belt of the pulling unit has a line speed in the range of 1.0 m / s to 1.5 m / s, and the second belt has a line speed in the range of 0.6 m / s to 1.0 m / s, wherein the difference in line speeds between the two belts is in the range of 0.2 m / s to 0.5 m / s. [6] Sealing machine for cans with a locking lid according to claim 1, wherein both the first and the second belt of the tightening unit are each covered with an outer elastic friction layer, the elastic friction layer being made of rubber or polyurethane to increase the coefficient of friction, and wherein the torque generated by the friction layer is in the range of 0.3 N·m to 0.6 N·m to ensure that the lid is properly tightened without deformation or over-tightening. [7] Sealing machine for cans with sealing lids according to claim 1, wherein the drive wheel comprises a drive shaft, one end of which extends to the inner wall surface of the machine base and the other end of which has a first and a second wheel element, the second wheel element having a slightly larger diameter than the first wheel element; wherein the driven wheel assembly comprises a first and a second wheel element bearing, wherein the first wheel element bearing comprises a first support in which a first axle is rotatably mounted, wherein a first guide wheel is mounted on this axle, and wherein the lower part of the first support has a connecting structure, the lower part of which forms a first pivot mount with a first pivot bore; wherein the second wheel element bearing comprises a second holder which has a second support in which a second axle is rotatably mounted, a second guide wheel being mounted on this axle, and the lower part of the second holder forms a second pivot mount with a second pivot bore; wherein the first and second wheel element bearings are each mounted on a height-adjustable support plate, wherein this support plate has two adjacent suspension brackets with suspension holes, wherein one end of the support plate has a guide, the underside of which forms a sliding surface, which has a lateral guide strip on each side; wherein the other end of the support plate has a pivoting support which is pivotably connected to the first and second pivoting mounts, and wherein a third guide wheel is arranged between the first pivoting mount and the pivoting support, and a fourth guide wheel is arranged between the second pivoting mount and the pivoting support; wherein the suspension brackets are each attached to two lifting suspensions, each of these lifting suspensions having a suspension with a through mounting hole which is pivotably connected to the suspension hole of the support plate by means of a fixing pin, and wherein the lifting suspensions are attached to a base frame the upper end of which has a height adjustment knob; wherein this height adjustment knob drives a deflection shaft via a worm gear, which sets a worm gear-sprocket drive in motion, which in turn drives a first and a second chain, the ends of which are each engaged with a first and second sprocket, these sprockets being each attached to the two lifting suspensions and adjusting the height of the carrier plate synchronously, so that the height positions of the first and second belts relative to the conveyor belt can be adjusted to different container heights and lid heights in order to carry out the screwing process. [8] Sealing machine for cans with sealing lids according to claim 7, wherein the connecting frame of the first wheel element bearing has a first pivot pin and the second holder of the second wheel element bearing has a second pivot pin; wherein the inner wall surface of the machine base is provided with a fixed support and a fixed bearing, and wherein the first and second pivot pins are each pivotably connected to a tension adjustment bracket, the tension adjustment bracket having a pivot end which is provided with a pivot connection area and a pivot bore, and which can be attached to the first and second pivot pins by means of a positioning pin; wherein one end of the pivoting end is connected to a telescopic bracket in which a guide column is arranged, wherein an elastic element is clamped between the guide column and the telescopic bracket, and wherein one end of the guide column is provided with a multi-stage positioning section, the side edge of which has several detent notches with different spacings which can be selectively engaged with the fixed support, whereby the first and second wheel element bearings are in elastic connection with the guide column via the multi-stage positioning section of the tension adjustment bracket in order to adjust the tension of the first and second belts. [9] Sealing machine for cans with a sealing lid according to claim 1, wherein a cooling line is provided in the machine base, wherein this cooling line is arranged for water cooling of the first and second belts. [10] Sealing machine for cans with a sealing lid according to claim 1, wherein a support belt is provided on each side of the conveyor belt to support the cans during transport.

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