Multi-station bottle cap knurling device with vertical turntable

Abstract

The utility model discloses a vertical rotary table multi-station bottle cap knurling device, and relates to the technical field of bottle cap manufacturing. In the knurling upper die mechanism, the rotating axis of an upper rotating disc extends in the vertical direction, a plurality of knurling shaft assemblies are circumferentially arranged around the rotating axis, the knurling shaft assemblies are arranged on the upper rotating disc and are configured to move in the vertical direction, knurling parts are arranged at the lower ends of the knurling shaft assemblies, and the knurling parts are configured to be capable of being inserted into and driving bottle caps with upward openings to horizontally rotate. In the knurling lower die mechanism, a lower rotating disc and an upper rotating disc are coaxially arranged and can synchronously rotate around the rotating axis in the same direction, the lower rotating disc is provided with a plurality of machining stations capable of supporting bottle caps, the machining stations correspond to knurling parts in a one-to-one up-and-down mode, and knurling outer dies are fixedly arranged on the outer side of the lower rotating disc in the radial direction of the lower rotating disc. The knurling outer die is configured to be capable of being matched with any knurling part to complete knurling of the bottle cap. The bottle cap knurling machine can efficiently complete knurling work of bottle caps and meet the requirement for rapid knurling forming of a large number of bottle caps.

Description

Technical Field

[0001] The utility model relates to the technical field of bottle cap manufacturing, in particular to a vertical turntable multi-station bottle cap knurling device. Background Art

[0002] In order to make the appearance of the bottle cap beautiful and increase the friction when opening the cap, so as to facilitate people to tighten or loosen the bottle cap, such as Figure 2 As shown, the top outer circumference of the bottle cap 100 is typically knurled to form a concave-convex portion 120. This process involves knurling the bottle cap 100. The concave-convex portion 120 can have various shapes, including vertical stripes, cross stripes, evenly spaced concave-convex portions, three-dimensional square shapes, and larger circular concave-convex portions. Furthermore, some concave-convex portions 120 may need to cut through the body of the bottle cap 100 to allow for ventilation during packaging and sterilization. Currently, existing bottle cap knurling devices have a simple structure and slow knurling speed, resulting in low overall efficiency and making them unsuitable for rapid knurling of large quantities of bottle caps. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a vertical turntable multi-station bottle cap knurling device that can efficiently complete the knurling work of bottle caps and meet the needs of rapid knurling of large quantities of bottle caps.

[0004] The present invention provides a vertical turntable multi-station bottle cap knurling device, which includes:

[0005] A knurled upper die mechanism includes an upper turntable and a knurled shaft assembly, wherein the upper turntable has a rotation axis extending in the vertical direction, a plurality of knurled shaft assemblies are provided, and are arranged circumferentially around the rotation axis, the knurled shaft assemblies are disposed on the upper turntable, and are configured to move in the vertical direction, the lower end of the knurled shaft assembly being a knurled portion, and the knurled portion being configured to be inserted into a bottle cap with an upward opening and to drive the bottle cap to rotate horizontally;

[0006] The knurling lower die mechanism includes a lower turntable and a knurling outer die. The lower turntable and the upper turntable are coaxially arranged and are both configured to rotate synchronously in the same direction around the rotation axis. The lower turntable is provided with a plurality of processing stations for supporting the bottle cap. The plurality of processing stations correspond one-to-one to the plurality of knurling parts and are arranged relative to each other up and down. The knurling outer die is arranged on the outer side of the lower turntable along its radial direction and is fixed. The knurling outer die is configured to cooperate with any of the knurling parts to complete the knurling of the bottle cap.

[0007] The vertical turntable multi-station bottle cap knurling device according to the embodiment of the utility model has at least the following beneficial effects: in the knurling lower die mechanism, the lower turntable is provided with a plurality of processing stations, the knurling outer die is fixedly arranged on the outer side of the lower turntable, and in the knurling upper die mechanism, a plurality of knurling shaft assemblies rotate with the upper turntable, and the knurling shaft assemblies can move up and down relative to the upper turntable, and the knurling portion of the knurling shaft assembly can be inserted into the bottle cap with the opening facing upward and drive the bottle cap to rotate horizontally. Therefore, during the bottle cap knurling operation, the bottle caps to be knurled can be continuously sent to the processing stations on the lower turntable. During the synchronous rotation of the upper turntable and the lower turntable, the knurled shaft assembly drives the knurled part to move downward and insert the bottle cap. The bottle cap will revolve as the lower turntable rotates, causing the bottle cap to move to the knurled outer die. At the same time, the bottle cap rotates on its own under the driving action of the knurled part. Under the cooperation of the knurled part and the knurled outer die, a concave and convex part that cuts through the bottle cap body is formed on the outer circle of the top of the bottle cap. When the bottle cap leaves the knurled outer die, the bottle cap can be taken away. Such a design can increase the speed of knurling the bottle cap, improve work efficiency, and can be adapted to the rapid knurling work of large quantities of bottle caps.

[0008] In some embodiments of the present invention, the vertical turntable multi-station bottle cap knurling device also includes an internal gear, which is fixed and coaxially arranged with the upper turntable. The knurling shaft assembly includes a punch rod, a knurling inner mold and an external gear. The punch rod extends in the up and down directions and is configured to be movable in the up and down directions. The external gear is located above the knurling inner mold and is meshed with the internal gear. The external gear is fixedly connected to the knurling inner mold and is coaxially sleeved on the lower end of the punch rod. The knurling inner mold is the knurling part.

[0009] In some embodiments of the present invention, the lower end of the punch rod extends downward to form a pressing head, and the pressing head is located below the knurled inner die and is coaxially arranged with the knurled inner die.

[0010] In some embodiments of the present invention, the vertical turntable multi-station bottle cap knurling device also includes a cylindrical cam, which is fixed, and the upper turntable is provided with a guide hole, and the punch rod is slidably connected with the guide hole, and the knurling shaft assembly also includes a guide bearing, which can be rotatably provided at the upper end of the punch rod and is rollingly connected with the cylindrical cam, so that the guide bearing can make a circular motion along the cylindrical cam and drive the punch rod to move in the up and down directions.

[0011] In some embodiments of the present invention, the knurled outer mold has an inner arc surface, the inner arc surface is provided with a plurality of evenly arranged first serrations, and the outer peripheral surface of the knurled inner mold is provided with a plurality of evenly arranged second serrations, and the second serrations and the first serrations can cooperate and bite to complete the knurling of the bottle cap.

[0012] In some embodiments of the present invention, the knurling outer die has a knurling length that is greater than the outer circumference of the bottle cap.

[0013] In some embodiments of the present invention, the knurling lower die mechanism also includes a plurality of rotating tables, the lower turntable is provided with a plurality of receiving grooves with openings facing upwards, each of the rotating tables can be rotatably arranged in each of the receiving grooves, and is configured to be able to rotate relative to the lower turntable around its own central axis extending in the up and down directions, and the rotating table is provided with the processing station.

[0014] In some embodiments of the present invention, the knurled lower die mechanism also includes a plurality of buffer seats and a plurality of buffer springs, each of the buffer seats is arranged in each of the receiving grooves and is located below the turntable, the turntable can be rotatably arranged on the buffer seat, each of the buffer springs is arranged in each of the receiving grooves, the lower end of the buffer spring is connected to the bottom wall of the receiving groove, the upper end of the buffer spring is connected to the lower end of the buffer seat, and the buffer spring is configured to drive the buffer seat to move upward.

[0015] In some embodiments of the present invention, the vertical turntable multi-station bottle cap knurling device also includes an upper fixed seat, a connecting shaft, a lower fixed seat and a rotation drive mechanism, the connecting shaft extends in the up and down directions and is fixedly connected to the upper turntable and the lower turntable, the opposite ends of the connecting shaft are respectively rotatably connected to the upper fixed seat and the lower fixed seat, the output end of the rotation drive mechanism is connected to one end of the connecting shaft, and the rotation drive mechanism is configured to drive the connecting shaft to drive the upper turntable and the lower turntable to rotate synchronously.

[0016] In some embodiments of the present invention, the rotary drive mechanism includes a driving wheel, a driven wheel, a flexible transmission member and a rotary drive member, the driven wheel is coaxially arranged at the lower end of the connecting shaft, the flexible transmission member is wound around the driving wheel and the driven wheel, the rotary drive member is arranged on the lower fixed seat, and the output end of the rotary drive member is connected to the driving wheel.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a vertical turntable multi-station bottle cap knurling device provided according to an embodiment of the utility model;

[0019] Figure 2 Schematic diagrams of the structure of bottle caps in the prior art; wherein (a) is a schematic diagram of a bottle cap that has not been knurled, and (b) is a schematic diagram of a bottle cap that has been knurled;

[0020] Figure 3 This is a structural diagram of the cooperation between the knurling inner die and the knurling outer die in the vertical turntable multi-station bottle cap knurling device provided according to an embodiment of the utility model;

[0021] Figure 4 It is a top view of a vertical turntable multi-station bottle cap knurling device provided according to an embodiment of the utility model;

[0022] Figure 5 Schematic diagram of the structure of the knurling inner mold in the vertical turntable multi-station bottle cap knurling device provided according to an embodiment of the present invention; wherein (a) is a cross-sectional view of the knurling inner mold along its axial direction, (b) is a schematic diagram of the expansion of the knurling inner mold, and (c) is a cross-sectional view of the knurling inner mold along its transverse direction;

[0023] Figure 6 The utility model is a structural schematic diagram of the knurling outer mold in the vertical turntable multi-station bottle cap knurling device provided in an embodiment of the present invention.

[0024] 1. The present invention relates to a bottle cap, a bottle cap and a housing; a first gear and a second gear; ... DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] Reference below Figures 1 to 6 The present invention describes a vertical turntable multi-station bottle cap knurling device provided in accordance with an embodiment of the present invention.

[0029] like Figures 1 to 6 As shown, the vertical turntable multi-station bottle cap knurling device according to the embodiment of the present invention can efficiently complete the knurling work of the bottle caps 100 and meet the demand for rapid knurling forming of large quantities of bottle caps 100.

[0030] Aluminum has good processing properties, so it is widely used to make various sealing caps. Specifically, the vertical turntable multi-station bottle cap knurling device of this embodiment can be used for aluminum caps with a diameter of 28mm or 38mm. It can quickly complete the knurling process on the cylindrical cap surface of the aluminum cap, and the knurling forming is stable, thereby making the concave and convex parts 120 that can penetrate the inside and outside of the aluminum cap on the aluminum cap. Figure 2 shown.

[0031] The vertical turntable multi-station bottle cap knurling device includes a knurling upper die mechanism 200 and a knurling lower die mechanism 300.

[0032] The structure of the knurling upper die mechanism 200 includes an upper turntable 210 and a knurling shaft assembly.

[0033] The upper turntable 210 is configured to rotate horizontally. Specifically, the upper turntable 210 has a rotation axis that extends in the vertical direction. A knurled shaft assembly is disposed on the upper turntable 210 and is capable of rotating in the horizontal plane along with the upper turntable 210. Multiple knurled shaft assemblies are provided, and the multiple knurled shaft assemblies are arranged in a circle around the rotation axis of the upper turntable 210. Moreover, each knurled shaft assembly is configured to move in the vertical direction relative to the upper turntable 210. Therefore, during the rotation of the upper turntable 210, all knurled shaft assemblies can revolve around the rotation axis of the upper turntable 210, and each knurled shaft assembly can be raised and lowered.

[0034] The lower end of the knurled shaft assembly is a knurled portion, and the knurled portion is configured to be inserted into a bottle cap 100 with its opening facing upward and to drive the bottle cap 100 to rotate horizontally. It will be understood that during the knurling process, the bottle cap 100 is inverted, that is, the bottle cap opening 110 is open and facing upward. As the knurled shaft assembly moves downward, the knurled portion can move downward and extend into the bottle cap 100 through the bottle cap opening 110. The knurled portion can contact the inner wall surface of the bottle cap 100. Moreover, the knurled portion can rotate in a horizontal plane around its own central axis, so that the knurled portion can drive the bottle cap 100 to rotate horizontally.

[0035] The knurling lower die mechanism 300 includes a lower turntable 310 and a knurling outer die 340 .

[0036] The lower turntable 310 is configured to rotate horizontally. Specifically, the lower turntable 310 is coaxially arranged with the upper turntable 210, that is, the rotation axis of the lower turntable 310 coincides with the rotation axis of the upper turntable 210. Moreover, the upper turntable 210 and the lower turntable 310 are configured to rotate synchronously in the same direction about their respective rotation axes.

[0037] It is understood that if the upper turntable 210 rotates clockwise, the lower turntable 310 also rotates clockwise, and the upper turntable 210 and the lower turntable 310 rotate at the same speed. If the upper turntable 210 rotates counterclockwise, the lower turntable 310 also rotates counterclockwise, and the upper turntable 210 and the lower turntable 310 rotate at the same speed. The shape of the upper turntable 210 and the shape of the lower turntable 310 can be designed according to actual needs and are not specifically limited here. The upper turntable 210 and the lower turntable 310 can be driven to rotate separately by a rotation drive component, or they can be driven to rotate by the same rotation drive component.

[0038] The lower turntable 310 is provided with a plurality of processing stations, each of which is used to support the bottle cap 100 with its opening 110 facing upward. The plurality of processing stations corresponds one-to-one with the plurality of knurled portions, and the plurality of processing stations are arranged in a vertically opposed relationship with the plurality of knurled portions. It will be appreciated that the plurality of processing stations are arranged in a circle around the rotation axis of the lower turntable 310, and the number of processing stations corresponds to the number of knurled portions. The number of processing stations can be selected based on actual needs. In this embodiment, the number of processing stations and the number of knurled shaft assemblies are both 24.

[0039] The knurled outer die 340 is disposed on one radial side of the lower turntable 310, that is, the knurled outer die 340 is located on the outside of the lower turntable 310. Furthermore, the knurled outer die 340 is fixed, that is, it remains stationary during the horizontal rotation of the lower turntable 310. The knurled outer die 340 is configured to cooperate with any knurled portion on the upper turntable 210 to complete the knurling of the bottle cap 100.

[0040] Specifically, the knurled outer mold 340 has an inner arc surface, which is located on the side of the knurled outer mold 340 close to the lower turntable 310. The inner arc surface is provided with a first serration 341, and a plurality of first serrations 341 are provided. The plurality of first serrations 341 are evenly arranged along the extension direction of the inner arc surface of the knurled outer mold 340. In this embodiment, the knurled outer mold 340 is designed as a circular arc when viewed from the top to the bottom. Figure 4 and Figure 6 shown.

[0041] Correspondingly, such as Figure 5 As shown in (a), (b), and (c), the outer circumferential surface of the knurled portion is provided with a plurality of second serrations 231, which are evenly spaced around the circumference of the knurled portion. The spacing between the first serrations 341 is the same as the spacing between the second serrations 231. When the knurled portion meets the knurled outer die 340, that is, when the knurled portion and the knurled outer die 340 are in an internal-external fit, the second serrations 231 and the first serrations 341 can engage, completing the knurling of the bottle cap 100.

[0042] The knurled outer die 340 has a knurling length that is greater than the outer circumference of the bottle cap 100, that is, the extension length of the multiple first serrations 341 is greater than the outer circumference of the bottle cap 100. Then, when the knurled portion meets the knurled outer die 340, the knurled portion drives the bottle cap 100 to rotate, while the knurled outer die 340 remains stationary. Therefore, the bottle cap 100 rolls relatively along the extension direction of the inner arc surface of the knurled outer die 340. During this process, the knurled outer die 340 and the knurled portion form a meshing relationship similar to a gear relationship at the meeting point, that is, the first serrations 341 and the second serrations 231 cooperate with each other, and the knurled portion meshes with the knurled outer die 340 and travels an arc length, the length of which is greater than the outer circumference of the bottle cap 100, so that concave and convex knurling marks are formed on the outer peripheral wall surface of the bottle cap 100, thereby completing the knurling processing of the bottle cap 100.

[0043] It is understandable that the number of first serrations 341 and the number of second serrations 231 can be set according to actual processing requirements, and the tooth pitch between the first serrations 341 and the second serrations 231 can be set according to the knurling requirements on the bottle cap 100, which is not specifically limited here.

[0044] In some embodiments, as Figure 1 and Figure 3 As shown, the vertical turntable multi-station bottle cap knurling device also includes an internal gear 700.

[0045] The internal gear 700 is fixed and coaxial with the upper turntable 210. It is understood that the inner circumference of the internal gear 700 is provided with multiple teeth, and the inner diameter of the internal gear 700 is larger than the diameter of the circle enclosed by all the knurled portions. In other words, all the knurled portions are located on the inner circumference of the internal gear 700. During the rotation of the upper turntable 210, the internal gear 700 remains stationary.

[0046] Each knurled shaft assembly comprises a punch rod 220, an external gear 250, and a knurled inner die 230. The punch rod 220 extends vertically and is configured to move vertically relative to the upper turntable 210. In this embodiment, the punch rod 220 is a round rod. The punch rod 220 is vertically slidably connected to the upper turntable 210, allowing for stable lifting and lowering.

[0047] The external gear 250 is located above the knurled inner die 230 and is meshed with the internal gear 700. The external gear 250 is fixedly connected to the knurled inner die 230 and is coaxially sleeved on the lower end of the punch rod 220. Specifically, the external gear 250 and the knurled inner die 230 are mounted on the punch rod 220 via bearings, allowing the external gear 250 and the knurled inner die 230 to rotate relative to the punch rod 220. Specifically, the external gear 250 and the knurled inner die 230 rotate about the central axis of the punch rod 220, which extends in the vertical direction. All of the external gears 250 are meshed with the internal gear 700.

[0048] The knurled inner mold 230 is a knurled portion. Specifically, the outer circumferential surface of the knurled inner mold 230 is provided with a plurality of second serrations 231, which are evenly arranged along the circumference of the knurled inner mold 230. Moreover, the second serrations 231 and the first serrations 341 can cooperate and engage with each other to complete the knurling of the bottle cap 100.

[0049] It is understood that when the upper turntable 210 drives all the punches 220 to rotate, the punches 220 can drive the external gear 250 and the knurled inner die 230 to rise and fall together. At the same time, because the external gear 250 on each punch 220 remains in meshing connection with the internal gear 700, the external gear 250 can drive the knurled inner die 230 to rotate together with the bottle cap 100. When the knurled inner die 230 drives the bottle cap 100 to move to the inside of the knurled outer die 340, the knurled inner die 230 cooperates with the knurled outer die 340 to apply a knurling process to the outer circumferential surface of the bottle cap 100. The external gear 250, internal gear 700, punches 220, knurled inner die 230 and knurled outer die 340 are all made of metal materials such as iron.

[0050] In some embodiments, as Figure 1 and Figure 3 As shown, the lower end of the punch rod 220 extends downward to form a pressing head 240. The pressing head 240 is located below the knurled inner die 230 and is coaxially arranged with the knurled inner die 230. It is understood that the pressing head 240 can be made of metal or plastic. The pressing head 240 can be cylindrical and is mounted on the lower end of the punch rod 220 via screws. The pressing head 240 is fixed relative to the punch rod 220 and can move in the vertical direction along with the punch rod 220.

[0051] After the bottle cap 100 is placed on the processing station of the lower turntable 310, the bottle cap 100 rotates with the rotation of the lower turntable 310. At the same time, the knurled shaft assembly rotates with the rotation of the upper turntable 210. Since the punch 220 can drive the knurled inner mold 230 and the lower pressing head 240 to move downward during the rotation, the knurled inner mold 230 and the lower pressing head 240 can extend into the bottle cap 100. At this time, the lower pressing head 240 can exert a certain downward pressure on the bottle cap 100, so that the bottle cap 100 can maintain a good contact state with the lower turntable 310 without jumping up and down, and the bottle cap 100 can rotate together with the lower turntable 310. When the bottle cap 100 moves to the inside of the knurled outer die 340, the bottle cap 100 can rotate along with the knurled inner die 230 under the cooperation of the knurled inner die 230 and the knurled outer die 340, so that the concave-convex portion 120 that cuts through the body of the bottle cap 100 can be formed on the outer circumference of the knurled inner die 230. At this time, the distance between the knurled inner die 230 and the knurled outer die 340 is equal to the thickness of the side wall of the bottle cap 100, and the outer diameter of the knurled inner die 230 is smaller than the inner diameter of the bottle cap 100.

[0052] Furthermore, a spring is provided between the punch rod 220 and the lower pressing head 240. The spring extends in the vertical direction, the upper end of the spring is fixedly connected to the lower end of the punch rod 220, and the lower end of the spring is fixedly connected to the upper end of the lower pressing head 240. The spring is configured to drive the lower pressing head 240 to move downward.

[0053] When the punch rod 220 drives the knurled inner mold 230 and the lower pressing head 240 to move downward and extend into the bottle cap 100, when the lower pressing head 240 contacts the bottle cap 100, the punch rod 220 will continue to drive the knurled inner mold 230 downward until the knurled inner mold 230 moves down to its proper position; after the knurling process is completed, the punch rod 220 drives the knurled inner mold 230 upward. At this time, due to the elastic force of the spring, the lower pressing head 240 always abuts against the bottle cap 100. When the knurled inner mold 230 moves up a certain distance relative to the bottle cap 100 along with the punch rod 220, the spring resets, so that the elastic force exerted by the spring on the lower pressing head 240 disappears, causing the lower pressing head 240 to move up along with the punch rod 220, and finally causing the knurled inner mold 230 and the lower pressing head 240 to be disengaged from the bottle cap 100, so that the bottle cap 100 can be removed from the lower turntable 310.

[0054] Of course, it is not ruled out that in other embodiments, a motor and a transmission structure are used to drive the knurled inner mold 230 to rotate horizontally. The motor can be set on the upper part of the punch rod 220, and the motor can rise and fall together with the punch rod 220. Moreover, a rotating shaft is provided on the upper part of the knurled inner mold 230, and the punch rod 220 is sleeved on the rotating shaft. The motor is connected to the rotating shaft through the transmission structure to drive the rotating shaft to drive the knurled inner mold 230 to rotate on the horizontal plane.

[0055] In some embodiments, as Figure 1 and Figure 4 As shown, the vertical turntable multi-station bottle cap knurling device also includes a cylindrical cam 400.

[0056] The cylindrical cam 400 is fixed and positioned above the upper turntable 210. During the rotation of the upper turntable 210, the cylindrical cam 400 remains stationary. The upper turntable 210 is provided with a guide hole that passes through the upper turntable 210 in the vertical direction. The punch rod 220 is slidably connected to the guide hole. Specifically, the punch rod 220 is mounted in the guide hole via a linear bearing, allowing the punch rod 220 to move up and down smoothly and quietly.

[0057] The knurled shaft assembly further includes a guide bearing 260. The guide bearing 260 is rotatably mounted on the upper end of the punch rod 220 and is in rolling engagement with the cylindrical cam 400, allowing the guide bearing 260 to perform circular motion along the cylindrical cam 400 and drive the punch rod 220 to move in the vertical direction.

[0058] In this embodiment, the guide bearing 260 is disposed on the upper portion of the punch rod 220 via a mounting shaft, and the guide bearing 260 is capable of rotating about a horizontally extending axis. Viewed from the top and bottom, the cylindrical cam 400 is annular and provided with a corresponding motion track. As the upper turntable 210 drives the knurled shaft assembly to rotate, the guide bearing 260 is capable of rolling along the motion track of the cylindrical cam 400. Since the motion track of the cylindrical cam 400 is curved, as the guide bearing 260 rolls, it can drive the punch rod 220, the knurled inner die 230, and the lower pressing head 240 to move up and down.

[0059] Of course, it is not ruled out that in other embodiments, a linear drive device such as a linear motor, a cylinder, etc. is used to drive the punch rod 220 to move up and down.

[0060] In some embodiments, as Figure 1 and Figure 3 As shown, the knurling lower die mechanism 300 further includes a plurality of rotating platforms 321 .

[0061] The lower turntable 310 is provided with multiple receiving slots, each of which is open upward. Each rotating platform 321 is rotatably mounted within each slot, with the rotating axis of the rotating platform 321 extending vertically. Specifically, the rotating platform 321 can be mounted within the receiving slots via bearings, thereby minimizing rotational resistance. Furthermore, each rotating platform 321 is configured to rotate relative to the lower turntable 310 about its own vertically extending central axis, and is equipped with a processing station.

[0062] It can be understood that, with the above-mentioned structural design, when the pressing head 240 abuts against the bottle cap 100 and the knurled inner mold 230 contacts the inner wall of the bottle cap 100, the knurled inner mold 230 can more easily drive the bottle cap 100 to rotate, thereby reducing the rotational resistance of the bottle cap 100, thereby avoiding wear on the surface of the bottle cap 100 due to strong friction. At this time, the rotating platform 321 not only provides support for the bottle cap 100, but also can rotate horizontally together with the bottle cap 100.

[0063] Further, such as Figure 1 and Figure 3 As shown, the knurling lower die mechanism 300 further includes a plurality of buffer seats 322 and a plurality of buffer springs 323 .

[0064] Each buffer seat 322 is disposed within each receiving slot and is located below the rotating platform 321. The rotating platform 321 is rotatably mounted on the buffer seat 322. Specifically, the rotating platform 321 is mounted on the buffer seat 322 via a bearing. The rotating platform 321 is rotatable relative to the buffer seat 322 about an axis extending vertically. The buffer seat 322 is slidably connected to the lower turntable 310 in the vertical direction, allowing the buffer seat 322 to be stably raised and lowered relative to the lower turntable 310.

[0065] Each buffer spring 323 is disposed within each receiving slot and is positioned below the buffer seat 322. The buffer spring 323 extends in the vertical direction, with the lower end of the buffer spring 323 connected to the bottom wall of the receiving slot and the upper end of the buffer spring 323 connected to the lower end of the buffer seat 322. Furthermore, the buffer spring 323 is configured to drive the buffer seat 322 upward. When the buffer seat 322 moves upward into position under the elastic force of the buffer spring 323, the upper surface of the rotating platform 321 is higher than or flush with the upper surface of the lower turntable 310.

[0066] It can be understood that the rotating table 321, the buffer seat 322 and the buffer spring 323 together constitute the rotating support assembly 320. The rotating support assembly 320 can effectively support the bottle cap 100 and rotate with the bottle cap 100 relative to the lower turntable 310. Moreover, it can also provide a buffering effect when the lower pressure head 240 abuts against the bottle cap 100, thereby preventing the lower pressure head 240 from easily crushing the bottle cap 100.

[0067] In addition, if Figure 1 、 Figure 3 and Figure 4As shown, a limit plate 330 is provided on the lower turntable 310. The limit plate 330 is fixedly connected to the lower turntable 310. When viewed from the top to the bottom, the limit plate 330 is annular and is coaxially arranged with the lower turntable 310. The circumferential surface of the limit plate 330 is provided with a plurality of limit notches. The number of limit notches is consistent with the number of processing stations, and the limit notches are located on the inner side of the processing stations. When viewed from the top to the bottom, the limit notches are arc-shaped, and the central angle of the limit notches is less than or equal to 180°. The sidewalls of the limit notches are adapted to the outer wall surface of the bottle cap 100. Therefore, when the bottle cap 100 is placed at the processing station, the sidewalls of the bottle cap 100 contact the sidewalls of the limit notches. During the process of the bottle cap 100 rotating relative to the lower turntable 310, the limit notches can exert a limiting effect on the bottle cap 100.

[0068] In some embodiments, as Figure 1 、 Figure 3 and Figure 4 As shown, the vertical turntable multi-station bottle cap knurling device also includes an upper fixing seat 510, a connecting shaft 610, a lower fixing seat 520 and a rotation drive mechanism.

[0069] The connecting shaft 610 extends in the vertical direction and can be fixedly connected to the upper turntable 210 and the lower turntable 310 respectively through a key connection, so that the connecting shaft 610 can drive the upper turntable 210 and the lower turntable 310 to rotate synchronously in the same direction. The upper fixed seat 510 is located below the upper turntable 210, and the lower fixed seat 520 is located below the lower turntable 310. The opposite ends of the connecting shaft 610 are rotatably connected to the upper fixed seat 510 and the lower fixed seat 520 respectively via bearings. The upper fixed seat 510 and the lower fixed seat 520 are both fixed, so that the upper turntable 210 and the lower turntable 310 can rotate around the connecting shaft 610 relative to the upper fixed seat 510 and the lower fixed seat 520.

[0070] The output end of the rotary drive mechanism is connected to one end of the connecting shaft 610. Furthermore, the rotary drive mechanism is configured to drive the connecting shaft 610 to synchronously rotate the upper turntable 210 and the lower turntable 310. It will be appreciated that the rotary drive mechanism can be positioned above the upper fixing base 510 or below the lower fixing base 520. The rotary drive mechanism can include a motor and a transmission structure, such as a speed reducer, with the motor driving the connecting shaft 610 to rotate via the transmission structure.

[0071] Furthermore, the rotary drive mechanism includes a driving wheel 630, a driven wheel 620, a flexible transmission member 640, and a rotary drive member. The driven wheel 620 is coaxially arranged at the lower end of the connecting shaft 610, the driven wheel 620 is fixedly connected to the connecting shaft 610, the flexible transmission member 640 is wound around the driving wheel 630 and the driven wheel 620, the rotary drive member is arranged on the lower fixed seat 520, and the output end of the rotary drive member is connected to the driving wheel 630. It is understandable that the rotary drive member may include a motor and a reducer, and the motor drives the driving wheel 630 to rotate through the reducer. The flexible transmission member 640 may be a belt, in which case the driving wheel 630 and the driven wheel 620 are both pulleys; the flexible transmission member 640 may also be a chain, in which case the driving wheel 630 and the driven wheel 620 are sprockets.

[0072] In addition, the inner gear 700 can be fixed to the lower fixing base 520 by bolts, and the knurling outer mold 340 is installed on the lower fixing base 520 through the bracket 350. The bracket 350 has good rigidity, which can ensure that it does not deform or vibrate when subjected to force during the knurling process, thereby ensuring a good knurling effect.

[0073] In some embodiments, as Figure 1 and Figure 4 As shown, the vertical turntable multi-station bottle cap knurling device further includes a feed assembly 800 and a discharge assembly. The feed assembly 800, the discharge assembly, and the knurling outer die 340 are all located on the periphery of the lower turntable 310. Furthermore, the feed assembly 800, the knurling outer die 340, and the discharge assembly are spaced apart along the circumference of the lower turntable 310. This means that the loading, knurling, and unloading of the bottle caps 100 can be performed simultaneously at staggered angular positions, thereby increasing the speed of the knurling process for the bottle caps 100.

[0074] It is understandable that the feed assembly 800 may include but is not limited to a feed seat and a push rod, the feed seat is provided with a feed track, one end of the feed track is a feed port, and the other end is a discharge port. The feed port of the feed track can be connected to an existing cap sorter. The push rod can be driven by a cylinder to move linearly, so that the push rod pushes the bottle cap 100 located at the discharge port to the processing station, thereby completing the loading of the bottle cap 100. The discharge assembly may include but is not limited to a movable vacuum suction cup, which can apply an adsorption effect to the bottle cap 100 and transfer the bottle cap 100 away from the processing station. The installation position of the feed assembly 800, the knurled outer mold 340 and the discharge assembly can be set according to actual conditions.

[0075] In the actual knurling work, the cylindrical bottle caps 100 that have been stamped are neatly arranged into a row with the bottle cap openings 110 facing upwards with the help of the cap sorter, and are transferred to one of the processing stations on the lower turntable 310 through the operation of the feeding assembly 800. At this time, the knurling shaft assembly is at the highest point, freeing up enough space for the bottle caps 100 to be transferred from the feeding assembly 800 to the processing station.

[0076] Driven by the rotary drive mechanism, the connecting shaft 610 causes the upper turntable 210 and the lower turntable 310 to rotate simultaneously. The lower turntable 310 then causes the rotary support assembly 320, the bottle cap 100, and the stop plate 330 to rotate simultaneously, while the upper turntable 210 also causes the knurled shaft assembly to rotate simultaneously. During this rotation process, the knurled shaft assembly rises and falls, and the knurled inner mold 230 rotates due to the meshing action between the outer gear 250 and the inner gear 700. As the knurled shaft assembly moves downward, when it reaches its lowest point, the lower pressing head 240 presses against the bottle cap 100, and the knurled inner mold 230 contacts the inner wall of the bottle cap 100.

[0077] When the bottle cap 100 rotates with the lower turntable 310 to the inner side of the knurled outer die 340, the knurled shaft assembly has already moved down to its position. At this time, the knurled inner die 230 and the knurled outer die 340 cooperate and engage with each other, allowing the bottle cap 100 to roll along the inner arc surface of the knurled outer die 340. The first serrations 341 and the second serrations 231 create the concave-convex portion 120 on the outer peripheral wall surface of the bottle cap 100, thus completing the knurling process of the bottle cap 100. After the bottle cap 100 leaves the knurled outer die 340, the discharging assembly can be used to transfer the bottle cap 100 from the processing station so that the bottle cap 100 to be knurled can be placed again at the processing station.

[0078] In the vertical turntable multi-station bottle cap knurling device of the embodiment of the present invention, since in the knurling lower die mechanism 300, the lower turntable 310 is provided with multiple processing stations, the knurling outer die 340 is fixedly arranged on the outer side of the lower turntable 310, and in the knurling upper die mechanism 200, multiple knurling shaft assemblies rotate with the upper turntable 210, and the knurling shaft assemblies can move up and down relative to the upper turntable 210, and the knurling part of the knurling shaft assembly can be inserted into the bottle cap 100 with the opening facing upward and drive the bottle cap 100 to rotate horizontally. Therefore, during the knurling work of the bottle cap 100, the bottle caps 100 to be knurled can be continuously sent to the processing station on the lower turntable 310. During the synchronous rotation of the lower turntable 310, the knurled shaft assembly drives the knurled portion to move downward and insert the bottle cap 100. The bottle cap 100 will revolve as the lower turntable 310 rotates, so that the bottle cap 100 moves to the knurled outer die 340. At the same time, the bottle cap 100 rotates under the driving action of the knurled portion. Under the cooperation of the knurled portion and the knurled outer die 340, a concave-convex portion 120 that cuts through the body of the bottle cap 100 is formed on the outer circle of the top of the bottle cap 100. When the bottle cap 100 leaves the knurled outer die 340, the bottle cap 100 can be taken away. Such a design can increase the speed of knurling the bottle cap 100, improve work efficiency, and can be adapted to the rapid knurling work of a large number of bottle caps 100.

[0079] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0080] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vertical turntable multi-station bottle cap knurling device, characterized in that: include: A knurled upper die mechanism includes an upper turntable and a knurled shaft assembly, wherein the upper turntable has a rotation axis extending in the vertical direction, a plurality of knurled shaft assemblies are provided, and are arranged circumferentially around the rotation axis, the knurled shaft assemblies are disposed on the upper turntable, and are configured to move in the vertical direction, the lower end of the knurled shaft assembly being a knurled portion, and the knurled portion being configured to be inserted into a bottle cap with an upward opening and to drive the bottle cap to rotate horizontally; The knurling lower die mechanism includes a lower turntable and a knurling outer die. The lower turntable and the upper turntable are coaxially arranged and are both configured to rotate synchronously in the same direction around the rotation axis. The lower turntable is provided with a plurality of processing stations for supporting the bottle cap. The plurality of processing stations correspond one-to-one to the plurality of knurling parts and are arranged relative to each other up and down. The knurling outer die is arranged on the outer side of the lower turntable along its radial direction and is fixed. The knurling outer die is configured to cooperate with any of the knurling parts to complete the knurling of the bottle cap.

2. The vertical turntable multi-station bottle cap knurling device according to claim 1, characterized in that: It also includes an internal gear, which is fixed and coaxial with the upper turntable. The knurled shaft assembly includes a punch rod, a knurled inner die and an external gear. The punch rod extends in the up and down directions and is configured to be movable in the up and down directions. The external gear is located above the knurled inner die and is meshed with the internal gear. The external gear is fixedly connected to the knurled inner die and are coaxially sleeved on the lower end of the punch rod. The knurled inner die is the knurled part.

3. The vertical turntable multi-station bottle cap knurling device according to claim 2, characterized in that: The lower end of the punch rod extends downward to form a pressing head, and the pressing head is located below the knurled inner die and is coaxially arranged with the knurled inner die.

4. The vertical turntable multi-station bottle cap knurling device according to claim 2, characterized in that: It also includes a cylindrical cam, which is fixed, and the upper turntable is provided with a guide hole, and the punch rod is slidably connected with the guide hole. The knurled shaft assembly also includes a guide bearing, which can be rotatably arranged at the upper end of the punch rod and is rollingly connected with the cylindrical cam, so that the guide bearing can make a circular motion along the cylindrical cam and drive the punch rod to move in the up and down directions.

5. The vertical turntable multi-station bottle cap knurling device according to claim 2, characterized in that: The knurled outer mold has an inner arc surface, and the inner arc surface is provided with a plurality of evenly arranged first serrations. The outer peripheral surface of the knurled inner mold is provided with a plurality of evenly arranged second serrations. The second serrations and the first serrations can cooperate and bite to complete the knurling of the bottle cap.

6. The vertical turntable multi-station bottle cap knurling device according to claim 5, characterized in that: The knurling outer die has a knurling length that is greater than the outer circumference of the bottle cap.

7. The vertical turntable multi-station bottle cap knurling device according to any one of claims 1 to 6, characterized in that: The knurling lower die mechanism also includes a plurality of rotating tables, and the lower turntable is provided with a plurality of receiving grooves with upward openings. Each of the rotating tables can be rotatably arranged in each of the receiving grooves, and is configured to be able to rotate relative to the lower turntable around its own central axis extending in the up and down directions. The rotating table is provided with the processing station.

8. The vertical turntable multi-station bottle cap knurling device according to claim 7, characterized in that: The knurled lower die mechanism also includes a plurality of buffer seats and a plurality of buffer springs, each of the buffer seats is arranged in each of the receiving grooves and is located below the rotating table, the rotating table can be rotatably arranged on the buffer seat, each of the buffer springs is arranged in each of the receiving grooves, the lower end of the buffer spring is connected to the bottom wall of the receiving groove, the upper end of the buffer spring is connected to the lower end of the buffer seat, and the buffer spring is configured to drive the buffer seat to move upward.

9. The vertical turntable multi-station bottle cap knurling device according to claim 1, characterized in that: It also includes an upper fixed seat, a connecting shaft, a lower fixed seat and a rotation drive mechanism, the connecting shaft extends in the up and down directions and is fixedly connected to the upper turntable and the lower turntable, the opposite ends of the connecting shaft are respectively rotatably connected to the upper fixed seat and the lower fixed seat, the output end of the rotation drive mechanism is connected to one end of the connecting shaft, and the rotation drive mechanism is configured to drive the connecting shaft to drive the upper turntable and the lower turntable to rotate synchronously.

10. The vertical turntable multi-station bottle cap knurling device according to claim 9, characterized in that: The rotary drive mechanism includes a driving wheel, a driven wheel, a flexible transmission member and a rotary drive member. The driven wheel is coaxially arranged at the lower end of the connecting shaft. The flexible transmission member is wound around the driving wheel and the driven wheel. The rotary drive member is arranged on the lower fixed seat. The output end of the rotary drive member is connected to the driving wheel.

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