Lubricating-free sanitary cap screwing head for aluminum cap

Abstract

The invention discloses a lubrication-free sanitary cap screwing head for an aluminum cap, relates to the technical field of bottle cap packaging, and aims to solve the problems that an existing cap screwing head is inconvenient to clean, and a bottle cap is easily scratched when a cutter retracts. The cap screwing head comprises a mounting block, a guide sleeve and a control flange are arranged on the lower surface of the mounting block, a center shaft is movably arranged in the control flange, and a cap pressing head assembly with an ejector rod and a connecting sleeve are arranged below the center shaft; the device further comprises an embossing and edge folding mechanism, an elastic limiting mechanism and a sealing and isolating mechanism. The embossing and edge folding mechanism is matched with a blocking wheel block through a lifting assembly, a rotating piece and a triggering assembly to achieve bottle cap embossing and edge folding. The sealing isolation mechanism isolates the internal structure, and the center shaft is connected with related parts through a corrosion-resistant ceramic lubrication-free bearing. During tool retracting, the embossing and edge folding assembly can be made to be far away from the bottle cap and then disengaged, and scratching is avoided; the open structure is matched with the sealing design, sanitation dead angles are few, the grease pollution risk is eliminated through the lubrication-free design, and the sanitary packaging requirements in the fields of food, medicine and the like are met.

Description

Technical Field

[0001] This invention relates to the field of bottle cap sealing technology, and more specifically, to a lubrication-free hygienic capping head for aluminum caps. Background Technology

[0002] In the food, pharmaceutical, and daily chemical industries, aluminum caps are widely used for packaging bottle and can products due to their advantages such as good sealing performance, corrosion resistance, and ease of processing. As a core component of automated packaging equipment, the capping head's performance directly affects packaging efficiency, cap sealing performance, and product hygiene and safety. With consumers' increasing demands for product hygiene standards and the increasingly stringent food and drug regulatory systems, capping heads not only need to meet packaging accuracy and stability requirements but also need to possess core characteristics such as easy cleaning, no contamination, and hygiene and safety.

[0003] Currently, traditional capping heads on the market have many problems that urgently need to be solved: First, they are not easy to clean. The transmission structure and blade assembly of traditional capping heads are mostly closed or semi-closed designs, which have many dead corners for hygiene. It is difficult to rinse thoroughly with cleaning fluid, and residual liquid, contaminants and microorganisms are easy to remain. Long-term use may lead to product contamination risks, and they are especially unsuitable for food and pharmaceutical fields with extremely high hygiene requirements. Second, the blade can easily scratch the bottle cap. After the traditional capping head completes the sealing, the blade assembly separates directly from the bottle cap. There is no buffer reset mechanism. During the separation process, the blade is easy to rub and collide with the edge of the bottle cap, resulting in scratches and deformation of the bottle cap surface, affecting the product's appearance integrity and sealing performance.

[0004] To address the aforementioned pain points, the industry urgently needs a capping head that combines hygiene and safety, easy cleaning, scratch resistance, and strong adaptability. By optimizing the structural design, the core problems of traditional capping heads, such as inconvenient cleaning, scratches from blade retraction, lubrication contamination, and poor adaptability, can be solved to meet the actual needs of the food, pharmaceutical, and other fields for high hygiene standards and high stability in packaging equipment. Summary of the Invention

[0005] The present invention aims to solve the problems of existing capping heads being inconvenient to clean and prone to scratching bottle caps when retracting the blade.

[0006] To address the aforementioned problems, this invention provides a lubrication-free sanitary capping head for aluminum caps, comprising a mounting block. Guide sleeves, evenly spaced and arranged in a ring, are fixedly mounted on the lower surface of the mounting block. A control flange is fixedly mounted on the outer side of each guide sleeve. A central shaft is movably disposed within the control flange. A capping head assembly is disposed below the central shaft, and a push rod is disposed within the capping head assembly. A connecting sleeve is disposed at the top of the capping head assembly. The invention also includes an embossing and folding mechanism for embossing and folding the cap when the capping head assembly presses down on it. The embossing and folding mechanism includes a lifting assembly disposed on the outside of the capping head assembly. Rotating components are rotatably disposed on the outside of the lifting assembly in a circular pattern at equal intervals. An embossing and folding assembly is disposed at the bottom end of the rotating components, and a triggering assembly is disposed at the top end of the rotating components. A stop wheel block that cooperates with the triggering assembly is fixedly installed at the bottom end of the guide sleeve. An elastic limiting mechanism is disposed between the guide sleeve and the lifting assembly to assist the vertical lifting of the lifting assembly. A sealing and isolation mechanism is disposed on the outside of the central shaft to isolate the internal structure of the capping head.

[0007] The present invention provides a lubrication-free hygienic capping head for aluminum caps, which, compared with the prior art, has the following beneficial effects, but is not limited to: To address the issues of inconvenient cleaning and scratches on bottle caps caused by the retraction blade in existing capping heads, the following design addresses this problem: When the capping head moves downwards and the bottle cap contacts the push rod, the upward thrust drives the capping head assembly, central shaft, lifting assembly, and connecting sleeve to simultaneously approach the guide sleeve's bottom retaining wheel block. This compresses the elastic limiting mechanism between the guide sleeve and the lifting assembly. When the trigger component at the top of the rotating part on the outer side of the lifting assembly contacts the retaining wheel block, the retaining wheel block pushes the trigger component outwards, causing the rotating part to rotate. This causes the upper part of the rotating part to open outwards while the lower part contracts inwards, prompting the embossing and folding edge assembly at the bottom of the rotating part to conform to the bottle cap. Subsequently, the lifting assembly rotates around the central shaft, causing the embossing and folding edge assembly to rotate as well, thus completing the folding and thread forming process on the bottle cap. After the capping action is completed, the process is finished. When the mounting block is raised, the elastic limiting mechanism causes the capping head assembly, central shaft, lifting assembly, and connecting sleeve to move synchronously away from the guide sleeve's bottom retaining wheel block. This resets the rotating parts, causing the embossing and folding edge assembly to move away from the bottle cap. As the mounting block moves further upward, the capping head assembly will then leave the bottle cap, effectively preventing scratches during blade retraction. The entire capping head can withstand rinsing with food-grade acid and alkali cleaning solutions. The capping head assembly, top rod, and embossing and folding edge assembly are all open designs, allowing for smooth rinsing and effectively preventing liquid accumulation and residue. This minimizes hygiene dead spots and ensures thorough cleaning. Furthermore, the sealing and isolation mechanism isolates the internal structure of the capping head, effectively preventing cleaning solution from entering during cleaning, ensuring safe and effective use.

[0008] Furthermore, a second spring is provided below the connection between the lifting assembly and the rotating component, and the second spring is located between the lifting assembly and the rotating component.

[0009] Furthermore, the triggering component includes a rotating frame rotatably disposed on the outside of the rotating member, a roller rotatably disposed at the end of the rotating frame, a first spring disposed between the rotating frame and the rotating member, and an adjustment mechanism disposed on the outside of the rotating member for adjusting the initial opening angle of the rotating member.

[0010] Furthermore, the adjusting mechanism includes a set screw and a sealing ring. The outer side of the rotating component has a threaded hole, and the set screw is threaded into the threaded hole to hold the bottom end of the rotating frame, thereby adjusting the initial position of the rotating component. The sealing ring is located between the set screw and the rotating component.

[0011] Furthermore, a locking mechanism is provided on the outer side of the rotating component to lock the shaft of the rotating component into the rotating component.

[0012] Furthermore, the locking mechanism includes a mounting port on the outer wall of one side of the rotating part, and a locking screw is threaded into the mounting port. A sealing gasket is provided between the locking screw and the shaft inside the rotating part.

[0013] Furthermore, the embossing and folding assembly includes a threaded cylinder, a movable rod, a baffle, and a third spring. The bottom of each rotating component is provided with a threaded opening, and the threaded cylinder is threaded into the threaded opening. The movable rod is movably disposed in the threaded cylinder, and the baffle is fixedly installed at the top of the movable rod. The third spring is sleeved on the outside of the movable rod and is used to connect the baffle and the threaded cylinder. The bottom of the movable rod is respectively fixedly installed with a thread cutter and a folding cutter, and the thread cutter and the folding cutter are symmetrically distributed on both sides of the central shaft.

[0014] Furthermore, the elastic limiting mechanism includes limiting rods that are fixed in a ring at equal intervals to the surface of the lifting assembly, and the top end of the limiting rods is movably installed in the guide sleeve. A fourth spring is sleeved on the outside of the limiting rods. One end of the fourth spring is connected to the lifting assembly, and the other end of the fourth spring is connected to the bottom of the stop wheel block.

[0015] Furthermore, the sealing and isolation mechanism includes a first corrugated sleeve and a second corrugated sleeve. The bottom end of the first corrugated sleeve is sealed to the top end of the connecting sleeve, and the top end of the first corrugated sleeve is sealed to the bottom of the control flange. The bottom end of the second corrugated sleeve is sealed to the top end of the control flange. A bushing is provided at the top end of the central shaft, and the top end of the second corrugated sleeve and the bushing are sealed to each other.

[0016] Furthermore, the central shaft, control flange, and connecting sleeve are all rotatably connected by lubrication-free bearings, which are made of corrosion-resistant ceramic material. Attached Figure Description

[0017] Figure 1 This is a first cross-sectional view of a lubrication-free sanitary capping head for aluminum caps according to an embodiment of the present invention; Figure 2 This is a first-view structural schematic diagram of an aluminum cap-free sanitary capping head according to an embodiment of the present invention; Figure 3 This is a second-view structural schematic diagram of an aluminum cap-free sanitary screw cap head according to an embodiment of the present invention; Figure 4 This is a third-view structural diagram of an aluminum cap-free sanitary capping head according to an embodiment of the present invention; Figure 5 This is a first-view structural schematic diagram of a half-section of an aluminum cap-free sanitary screw cap head according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a second-view structure of a lubrication-free sanitary capping head for aluminum caps according to an embodiment of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point A in the diagram; Figure 8 This is a first-view structural diagram of the lifting assembly in an aluminum cap lubrication-free sanitary capping head according to an embodiment of the present invention; Figure 9 This is a second-view structural diagram of the lifting assembly in an aluminum cap-free sanitary capping head according to an embodiment of the present invention; Figure 10 This is a half-sectional schematic diagram of the lifting assembly in an aluminum cap-free sanitary capping head according to an embodiment of the present invention; Figure 11 for Figure 10 A magnified structural diagram at point B in the diagram.

[0018] Explanation of reference numerals in the attached figures: 1. Mounting block; 11. Guide sleeve; 12. Control flange; 13. Central shaft; 14. Top rod; 15. Pressure cap assembly; 16. Connecting sleeve; 2. Embossing and folding mechanism; 21. Lifting assembly; 22. Rotating component; 23. Trigger assembly; 231. Rotating frame; 232. Roller; 233. First spring; 24. Thrust wheel block; 25. Second spring; 3. Embossing and folding assembly; 31. Threaded cylinder; 32. Movable rod; 33. Baffle plate; 34. Third spring; 35. Thread cutter; 36. Folding cutter; 4. Adjustment mechanism; 41. Top screw; 42. Sealing ring; 5. Locking mechanism; 51. Locking screw; 52. Sealing gasket; 6. Elastic limit mechanism; 61. Limiting rod; 62. Fourth spring; 7. Sealing and isolation mechanism; 71. First corrugated sleeve; 72. Second corrugated sleeve; 73. Lubrication-free bearing. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0020] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, 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 invention.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0024] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0025] See Figures 1-11 An embodiment of the present invention provides a lubrication-free sanitary capping head for aluminum caps, comprising a mounting block 1. Guide sleeves 11, evenly spaced and arranged in a ring, are fixedly mounted on the lower surface of the mounting block 1. A control flange 12 is fixedly mounted on the outer side of the guide sleeves 11. A central shaft 13 is movably disposed within the control flange 12. A capping head assembly 15 is disposed below the central shaft 13, and a push rod 14 is disposed within the capping head assembly 15. A connecting sleeve 16 is disposed at the top of the capping head assembly 15. The invention also includes an embossing and folding mechanism 2, used to emboss and fold the cap when the capping head assembly 15 presses down on it. The folding mechanism 2 includes a lifting assembly 21 disposed on the outside of the capping head assembly 15. Rotating members 22 are rotatably disposed on the outside of the lifting assembly 21 in a ring at equal intervals. An embossing folding assembly 3 is disposed at the bottom end of the rotating members 22, and a trigger assembly 23 is disposed at the top end of the rotating members 22. A stop wheel block 24 that cooperates with the trigger assembly 23 is fixedly installed at the bottom end of the guide sleeve 11. An elastic limiting mechanism 6 is disposed between the guide sleeve 11 and the lifting assembly 21 to assist the vertical lifting of the lifting assembly 21. A sealing and isolation mechanism 7 is disposed on the outside of the central shaft 13 to isolate the internal structure of the capping head.

[0026] In this embodiment, addressing the problems of inconvenient cleaning and easy scratching of bottle caps by the retraction blade of existing capping heads, when the capping head moves downward and the bottle cap contacts the top rod 14, the upward thrust will drive the capping head assembly 15, central shaft 13, lifting assembly 21, and connecting sleeve 16 to simultaneously approach the guide sleeve 11 bottom of the retaining wheel block 24, compressing the elastic limiting mechanism 6 between the guide sleeve 11 and the lifting assembly 21. When the triggering component 23 at the top of the outer rotating part 22 of the lifting assembly 21 contacts the retaining wheel block 24, the retaining wheel block 24 will push the triggering component 23 outward, causing the rotating part 22 to rotate. This causes the upper part of the rotating part 22 to open outward, while the lower part of the rotating part 22 contracts inward, causing the embossing and folding edge assembly 3 at the bottom of the rotating part 22 to adhere to the bottle cap. Subsequently, the lifting assembly 21 rotates around the central shaft 13, causing the embossing and folding edge assembly 3 to rotate together, thus completing the folding and threading of the bottle cap. During the capping process, after the screw-sealing action is completed, the mounting block 1 is raised. Under the elastic force of the elastic limiting mechanism 6, the capping head assembly 15, the central shaft 13, the lifting assembly 21, and the connecting sleeve 16 are simultaneously moved away from the guide sleeve 11 bottom stop wheel block 24, thereby causing the rotating part 22 to reset and causing the embossing and folding edge assembly 3 to move away from the bottle cap. Then, as the mounting block 1 moves further upward, the capping head assembly 15 will leave the bottle cap, effectively preventing the bottle cap from being scratched when the knife retracts. At the same time, the entire capping head can withstand the rinsing of food-grade acid and alkali cleaning solutions. The capping head assembly 15, the top rod 14, and the embossing and folding edge assembly 3 are all open designs, allowing the cleaning solution to rinse smoothly, effectively preventing liquid accumulation and contamination residue, reducing hygiene dead corners, and ensuring thorough cleaning. At the same time, the sealing and isolation mechanism 7 can also isolate the internal structure of the capping head, effectively preventing the cleaning solution from entering the interior during the cleaning process, ensuring safety in later use, and improving the use effect.

[0027] Optional, please refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 9 A second spring 25 is provided below the connection between the lifting assembly 21 and the rotating component 22, and the second spring 25 is located between the lifting assembly 21 and the rotating component 22.

[0028] In this embodiment, the two ends of the second spring 25 are fixedly connected to the side wall of the rotating member 22 and the side wall of the lifting assembly 21, respectively, so that the bottom of the rotating member 22 maintains the initial opening angle in its natural state; during the sealing process, the rotating member 22 rotates to compress the second spring 25 to store elastic potential energy; after the sealing is completed, the second spring 25 releases its potential energy, drives the rotating member 22 to quickly reset, and drives the embossing and folding assembly 3 away from the bottle cap.

[0029] Optional, please refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 9and Figure 10 The triggering component 23 includes a rotating frame 231 rotatably disposed on the outside of the rotating member 22. A roller 232 is rotatably disposed at the end of the rotating frame 231. A first spring 233 is also disposed between the rotating frame 231 and the rotating member 22. An adjustment mechanism 4 is also disposed on the outside of the rotating member 22 for adjusting the initial opening angle of the rotating member 22.

[0030] In this embodiment, the rotating frame 231 is rotatably mounted on the outside of the rotating component 22 via a pin, and the roller 232 is mounted on the end of the rotating frame 231 via a bearing. One end of the first spring 233 is fixed to the rotating frame 231, and the other end is fixed to the rotating component 22. The adjustment mechanism 4 is mounted on the outside of the rotating component 22 and is used to adjust the initial angle. When the lifting assembly 21 rises, the roller 232 contacts the inclined surface of the stop wheel block 24, and the stop wheel block 24 applies an outward thrust, driving the rotating frame 231 to rotate around the pin, thereby driving the rotating component 22 to rotate, so that the embossing and folding assembly 3 shrinks inward to fit the bottle cap.

[0031] Optional, please refer to Figure 9 and Figure 11 The adjusting mechanism 4 includes a set screw 41 and a sealing ring 42. The outer side of the rotating part 22 is provided with a threaded hole, and the set screw 41 is threaded into the threaded hole to support the bottom end of the rotating frame 231, thereby adjusting the initial position of the rotating part 22. The sealing ring 42 is located between the set screw 41 and the rotating part 22.

[0032] In this embodiment, the set screw 41 is threaded into the threaded hole on the outside of the rotating member 22, and its end abuts against the bottom end of the rotating frame 231. The sealing ring 42 is embedded in the thread gap between the set screw 41 and the rotating member 22. Rotating the set screw 41 can change the holding force on the rotating frame 231, thereby adjusting the initial opening angle of the rotating member 22. For aluminum caps of different diameters, rotating the set screw 41 pushes or releases the rotating frame 231. When the set screw 41 moves towards the rotating frame 231 and abuts against the rotating frame 231, the rotating frame 231 and the rotating member 231... When the first spring 233 between 2 is compressed, the bottom of the rotating part 22 can open to a larger angle under the elastic force of the second spring 25. When the set screw 41 moves away from the rotating frame 231, the first spring 233 returns to its original position, and the initial angle of the bottom of the rotating part 22 is reduced accordingly, thereby achieving the purpose of flexibly adjusting the initial opening angle of the rotating part 22 and making the embossed edge assembly 3 fit the bottle cap size. At the same time, the sealing ring 42 can prevent cleaning liquid from entering the interior from the thread gap, resulting in better performance.

[0033] Optional, please refer to Figure 9 and Figure 11A locking mechanism 5 is also provided on the outer side of the rotating component 22 to lock the shaft of the rotating component 22 into the rotating component 22. The locking mechanism 5 includes a mounting port on one side of the outer wall of the rotating component 22, and a locking screw 51 is threaded into the mounting port. A sealing gasket 52 is provided between the locking screw 51 and the shaft inside the rotating component 22.

[0034] In this embodiment, the mounting port of the locking mechanism 5 is located on the side of the rotating part 22. The locking screw 51 is threaded into the mounting port, and the sealing gasket 52 is placed between the locking screw 51 and the internal shaft of the rotating part 22. Tightening the locking screw 51 can fix the shaft and prevent the shaft from shifting when the rotating part 22 rotates. During assembly, after adjusting the position of the rotating part 22, the locking screw 51 is tightened, and the shaft is pressed by the sealing gasket 52 to achieve a fixed connection between the rotating part 22 and the shaft. The sealing gasket 52 prevents cleaning fluid from entering from the mounting port.

[0035] Optional, please refer to Figure 4 , Figure 6 and Figure 7 The embossing and folding assembly 3 includes a threaded cylinder 31, a movable rod 32, a baffle 33, and a third spring 34. The bottom of each rotating component 22 is provided with a threaded opening, and the threaded cylinder 31 is threaded into the threaded opening. The movable rod 32 is movably disposed in the threaded cylinder 31, and the baffle 33 is fixedly installed on the top of the movable rod 32. The third spring 34 is sleeved on the outside of the movable rod 32 and is used to connect the baffle 33 and the threaded cylinder 31. The bottom of the movable rod 32 is fixedly installed with a thread cutter 35 and a folding cutter 36, and the thread cutter 35 and the folding cutter 36 are symmetrically distributed on both sides of the central shaft 13.

[0036] In this embodiment, the threaded cylinder 31 is threadedly installed at the bottom of the rotating component 22. The movable rod 32 passes through the threaded cylinder 31, the baffle 33 is sleeved on the top of the movable rod 32, and the third spring 34 is sleeved on the outside of the movable rod 32 and is in a compressed state, with its two ends abutting against the baffle 33 and the threaded cylinder 31 respectively. The thread cutter 35 and the folding blade 36 are fixedly installed at the bottom of the movable rod 32, symmetrically distributed in pairs. When the rotating component 22 retracts, the thread cutter 35 and the folding blade 36 are in contact with the surface of the bottle cap, and the third spring 34 provides buffer pressure, so that the cutter and the bottle cap are in flexible contact. As the central shaft 13 rotates, the thread cutter 35 completes the thread forming, and the folding blade 36 completes the folding operation.

[0037] Optional, please refer to Figure 3 The elastic limiting mechanism 6 includes limiting rods 61 that are fixed in a ring at equal intervals on the surface of the lifting assembly 21. The top end of the limiting rods 61 is movably installed in the guide sleeve 11. A fourth spring 62 is sleeved on the outside of the limiting rods 61. One end of the fourth spring 62 is connected to the lifting assembly 21, and the other end of the fourth spring 62 is connected to the bottom of the stop wheel block 24.

[0038] In this embodiment, the limiting rod 61 is vertically welded to the upper surface of the lifting assembly 21, and its top end is slidably inserted into the inside of the guide sleeve 11. The fourth spring 62 is sleeved on the outside of the limiting rod 61, and its two ends are fixedly connected to the upper surface of the lifting assembly 21 and the lower surface of the retaining wheel block 24, respectively. When the lifting assembly 21 rises, the limiting rod 61 slides along the guide sleeve 11, and the fourth spring 62 is compressed, providing buffering and restoring force. After the encapsulation is completed, the fourth spring 62 releases potential energy, driving the lifting assembly 21 to descend rapidly, thereby resetting the rotating part 22 and the tool.

[0039] Optional, please refer to Figure 1 and Figure 5 The sealing and isolation mechanism 7 includes a first corrugated sleeve 71 and a second corrugated sleeve 72. The bottom end of the first corrugated sleeve 71 is sealed to the top end of the connecting sleeve 16, and the top end of the first corrugated sleeve 71 is sealed to the bottom end of the control flange 12. The bottom end of the second corrugated sleeve 72 is sealed to the top end of the control flange 12. A bushing is provided at the top end of the central shaft 13, and the top end of the second corrugated sleeve 72 is sealed to the bushing.

[0040] In this embodiment, the top end of the first corrugated sleeve 71 is sealed to the bottom of the control flange 12 via a snap fastener, and the bottom end is sealed to the top end of the connecting sleeve 16 via a snap fastener; the top end of the second corrugated sleeve 72 is sealed to the bushing of the central shaft 13 via a snap fastener, and the bottom end is sealed to the top end of the control flange 12 via a snap fastener; the corrugated sleeves can move up and down with the central shaft 13; the double corrugated sleeves form a closed cavity, isolating the central shaft 13 from the external environment, preventing acid and alkaline cleaning solutions from entering the internal transmission components, and preventing internal contaminants from leaking out; the expansion and contraction characteristics of the corrugated sleeves do not affect the lifting and rotation of the central shaft 13.

[0041] Optional, please refer to Figure 5 The central shaft 13, the control flange 12, and the connecting sleeve 16 are all rotatably connected by a lubrication-free bearing 73, which is made of corrosion-resistant ceramic material.

[0042] In this embodiment, the lubrication-free bearing 73 is embedded at the rotational connection between the control flange 12 and the central shaft 13, and between the connecting sleeve 16 and the central shaft 13. The inner ring is interference-fitted with the central shaft 13, and the outer ring is transition-fitted with the control flange 12 and the connecting sleeve 16. The bearing material is zirconia ceramic, which has a smooth surface and requires no lubrication. The lubrication-free bearing 73 utilizes the low friction characteristics of the ceramic material to achieve smooth rotation of the central shaft 13 without the need for adding lubricating grease. The ceramic material has excellent resistance to acid and alkali corrosion, and its service life is twice that of metal bearings. The lubrication-free design completely eliminates the risk of grease contamination.

[0043] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A lubrication-free hygienic capping head for aluminum caps, characterized in that, The system includes a mounting block (1), on the lower surface of which guide sleeves (11) are fixedly mounted at equal intervals in a ring. A control flange (12) is fixedly mounted on the outer side of the guide sleeves (11). A central shaft (13) is movably disposed in the control flange (12). A pressure cap assembly (15) is disposed below the central shaft (13), and a top rod (14) is disposed in the pressure cap assembly (15). A connecting sleeve (16) is disposed at the top of the pressure cap assembly (15). The system also includes: The embossing and folding mechanism (2) is used to perform embossing and folding operations on the bottle cap when the capping head assembly (15) presses down on the bottle cap. The embossing and folding mechanism (2) includes a lifting assembly (21) disposed on the outside of the capping head assembly (15). Rotating parts (22) are rotatably disposed on the outside of the lifting assembly (21) in a circular arrangement at equal distances. An embossing and folding assembly (3) is disposed at the bottom end of the rotating parts (22). A trigger assembly (23) is disposed at the top end of the rotating parts (22). A stop wheel block (24) that cooperates with the trigger assembly (23) is fixedly installed at the bottom end of the guide sleeve (11). An elastic limiting mechanism (6) is provided between the guide sleeve (11) and the lifting assembly (21) to assist the vertical lifting of the lifting assembly (21); The sealing and isolation mechanism (7) is located on the outside of the central shaft (13) and is used to isolate the internal structure of the capping head.

2. The aluminum capping head without lubrication as described in claim 1, characterized in that, A second spring (25) is provided below the connection between the lifting assembly (21) and the rotating component (22), and the second spring (25) is located between the lifting assembly (21) and the rotating component (22).

3. The aluminum capping head without lubrication as described in claim 2, characterized in that, The triggering component (23) includes a rotating frame (231) rotatably disposed on the outside of the rotating member (22). A roller (232) is rotatably disposed at the end of the rotating frame (231). A first spring (233) is also disposed between the rotating frame (231) and the rotating member (22). An adjustment mechanism (4) is also disposed on the outside of the rotating member (22) for adjusting the initial opening angle of the rotating member (22).

4. The aluminum capping head without lubrication as described in claim 3, characterized in that, The adjustment mechanism (4) includes a set screw (41) and a sealing ring (42). The outer side of the rotating part (22) is provided with a threaded hole, and the set screw (41) is threaded into the threaded hole to hold the bottom end of the rotating frame (231) and thereby adjust the initial position of the rotating part (22). The sealing ring (42) is located between the set screw (41) and the rotating part (22).

5. The aluminum capping head without lubrication as described in claim 4, characterized in that, A locking mechanism (5) is also provided on the outside of the rotating part (22) for locking the shaft of the rotating part (22) into the rotating part (22).

6. The aluminum capping head without lubrication as described in claim 5, characterized in that, The locking mechanism (5) includes an installation port on the outer wall of one side of the rotating part (22), and a locking screw (51) is threaded into the installation port. A sealing gasket (52) is provided between the locking screw (51) and the shaft inside the rotating part (22).

7. The aluminum capping head without lubrication as described in claim 1, characterized in that, The embossing and folding assembly (3) includes a threaded cylinder (31), a movable rod (32), a baffle (33), and a third spring (34). The bottom of the rotating part (22) is provided with a threaded opening, and the threaded cylinder (31) is threaded into the threaded opening. The movable rod (32) is movably disposed in the threaded cylinder (31), and the baffle (33) is fixedly installed on the top of the movable rod (32). The third spring (34) is sleeved on the outside of the movable rod (32) and is used to connect the baffle (33) and the threaded cylinder (31). The bottom of the movable rod (32) is fixedly installed with a thread cutter (35) and a folding cutter (36), and the thread cutter (35) and the folding cutter (36) are symmetrically distributed on both sides of the central shaft (13).

8. The aluminum capping head without lubrication as described in claim 1, characterized in that, The elastic limiting mechanism (6) includes limiting rods (61) that are fixed in a ring at equal intervals on the surface of the lifting assembly (21), and the top end of the limiting rods (61) is movably installed in the guide sleeve (11). A fourth spring (62) is sleeved on the outside of the limiting rods (61). One end of the fourth spring (62) is connected to the lifting assembly (21), and the other end of the fourth spring (62) is connected to the bottom of the stop wheel block (24).

9. The aluminum capping head without lubrication as described in claim 1, characterized in that, The sealing and isolation mechanism (7) includes a first corrugated sleeve (71) and a second corrugated sleeve (72). The bottom end of the first corrugated sleeve (71) is sealed to the top end of the connecting sleeve (16), and the top end of the first corrugated sleeve (71) is sealed to the bottom of the control flange (12). The bottom end of the second corrugated sleeve (72) is sealed to the top end of the control flange (12). The top end of the central shaft (13) is provided with a bushing, and the top end of the second corrugated sleeve (72) is sealed to the bushing.

10. The aluminum capping head without lubrication as described in claim 1, characterized in that, The central shaft (13), control flange (12), and connecting sleeve (16) are all rotatably connected by a lubrication-free bearing (73), which is made of corrosion-resistant ceramic material.

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