Necking part shaping device based on thin-wall metal tank

Abstract

The invention discloses a necking part shaping device based on a thin-wall metal can, and relates to the field of metal can machining. The die holder assembly comprises a ventilation shaft extending in the first direction and a shaft sleeve, the ventilation shaft is provided with an air supply channel extending and penetrating in the first direction, and the end, in the first direction, of the ventilation shaft can stretch into the thin-wall metal tank so that compressed air can be introduced into the thin-wall metal tank through the air supply channel. The shaft sleeve coaxially sleeved on the ventilation shaft can rotate around a central axis extending along a first direction; the shaping die assembly arranged on the shaft sleeve comprises at least two shaping die heads evenly arranged in the circumferential direction of the ventilation shaft, and the shaping die heads are provided with shaping faces capable of shaping the necking part of the thin-wall metal can. The can pushing assembly and the ventilation shaft are oppositely arranged in the first direction, and the thin-wall metal can can be pushed to the shaping die assembly in the first direction so that all the shaping faces can make contact with the necking part of the thin-wall metal can. According to the invention, annular connection marks or other indentations on the necking part of the thin-wall metal can can be removed, and the forming quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal can processing, in particular to a necking part shaping device based on a thin-wall metal can. BACKGROUND

[0002] In the production process of a thin-wall metal can, when necking the can opening part, due to the properties of the metal material itself and the forming principle, the entire process can only be completed by gradually necking through the cooperation of multiple necking machine groups. Moreover, due to mold cooperation or other various reasons, there are often many annular connection marks or other shaped indentation marks left on the necking section of the can body (i.e. the can opening, can opening shoulder, etc.). However, the surface defects at this position of the thin-wall metal can will reduce the product pass rate and the appearance quality of the can body, and also cause great hidden dangers in the sealing performance and mechanical performance of the can body. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a necking part shaping device based on a thin-wall metal can, which can effectively remove the annular connection marks or other indentation marks on the necking part of the thin-wall metal can, i.e. the can opening and can opening shoulder position, to ensure good forming quality of the thin-wall metal can, thereby improving the product pass rate and product appearance quality of the thin-wall metal can and reducing the scrap rate.

[0004] The embodiment of the present application provides a necking part shaping device based on a thin-wall metal can, which comprises: a die seat assembly comprising a gas passage shaft extending in a first direction and a shaft sleeve, the gas passage shaft is provided with a gas passage channel extending through in the first direction, one end of the gas passage shaft extending in the first direction can extend into the thin-wall metal can, so that the gas passage channel introduces compressed air into the thin-wall metal can, the shaft sleeve is coaxially arranged on the gas passage shaft, and the shaft sleeve is configured to rotate around the central axis extending in the first direction; a shaping die assembly arranged on the shaft sleeve, the shaping die assembly comprises at least two shaping die heads, all the shaping die heads are uniformly arranged in the circumferential direction of the gas passage shaft, and the shaping die head is provided with a shaping surface for shaping the necking part of the thin-wall metal can; a can pushing assembly oppositely arranged with the gas passage shaft in the first direction, the can pushing assembly is configured to push the thin-wall metal can towards the shaping die assembly in the first direction, so that the shaping surface of all the shaping die heads is in contact with the necking part of the thin-wall metal can.

[0005] According to the neck shaping device for thin-wall metal cans, when the can pushing assembly pushes the thin-wall metal cans to the shaping die assembly along the first direction, the necks of the thin-wall metal cans can be in contact with the shaping surfaces of all the shaping dies; during the rotation of the shaft sleeve, all the shaping dies can press the necks of the thin-wall metal cans and revolve along the necks of the thin-wall metal cans, and the necks of the thin-wall metal cans are pressed by the shaping dies for multiple times to complete the shaping of the necks, so that the annular connection marks or other pressure marks on the necks can be effectively removed, the forming quality and appearance quality of the thin-wall metal cans are improved, and the thin-wall metal cans can be effectively prevented from being deformed due to the air pressure during the shaping, so that the shaping effect of the thin-wall metal cans is ensured.

[0006] In some embodiments of the present application, the neck shaping device for thin-wall metal cans further comprises a machine base, a main shaft, a first connecting disc and a second connecting disc, the main shaft extends along the first direction and is arranged on the machine base, the first connecting disc and the second connecting disc are arranged at intervals along the first direction and are coaxially arranged on the main shaft, the die base assemblies and the can pushing assemblies are both provided in plurality and are uniformly arranged around the main shaft, the die base assemblies are arranged on the first connecting disc, the can pushing assemblies are arranged on the second connecting disc, and the shaping die assemblies are provided in plurality and are arranged in one-to-one correspondence with the plurality of die base assemblies.

[0007] In some embodiments of the present application, the neck shaping device for thin-wall metal cans further comprises a first driving assembly and a gear ring, the die base assembly further comprises a base and a first gear, the ventilation shaft is fixedly arranged on the base, the shaft sleeve is rotatably connected with the base, the first gear is coaxially arranged on the shaft sleeve and is fixedly connected with the shaft sleeve, the gear ring is arranged on the machine base and is meshingly connected with all the first gears, the main shaft is rotatably connected with the machine base, the first connecting disc and the second connecting disc are both fixedly connected with the main shaft, and the first driving assembly is used to drive the main shaft to rotate.

[0008] In some embodiments of the present application, the neck shaping device based on the thin-wall metal can further comprises a first bearing sleeve, a first air distribution disc and a first spring, the first bearing sleeve is coaxially sleeved on the main shaft and fixedly connected with the main shaft, the first bearing sleeve is rotationally connected with the base, the first bearing sleeve is provided with a plurality of first flow channels, the plurality of first flow channels are uniformly arranged around the main shaft and respectively communicated with the plurality of air feeding channels through pipelines, the first air distribution disc is slidingly connected with the base along a first direction, the first bearing sleeve can rotate relative to the first air distribution disc, the first spring is connected between the base and the first air distribution disc, and the first spring is used to drive the first air distribution disc to abut against the first bearing sleeve so that the first air distribution disc feeds compressed air into the first flow channels.

[0009] In some embodiments of the present application, the first air distribution disc is provided with a first air distribution port and a first air guide groove in the shape of a circular arc, the first air distribution port is communicated with the first air guide groove, the center of the first air guide groove coincides with the center of the first bearing sleeve, and part of the first flow channels are communicated with the first air guide groove when the first bearing sleeve rotates.

[0010] In some embodiments of the present application, the can pushing assembly comprises a vacuum suction rod and a second driving assembly, the vacuum suction rod extends along a first direction, the vacuum suction rod can vacuum-suck the bottom of the thin-wall metal can at one end of the shaping die assembly along the first direction, and the second driving assembly is used to drive the vacuum suction rod to move along the first direction.

[0011] In some embodiments of the present application, the neck shaping device based on the thin-wall metal can further comprises a second bearing sleeve, a second air distribution disc and a second spring, the second bearing sleeve is coaxially sleeved on the main shaft and fixedly connected with the main shaft, the second bearing sleeve is rotationally connected with the base, the second bearing sleeve is provided with a plurality of second flow channels, the plurality of second flow channels are uniformly arranged around the main shaft and respectively communicated with the interiors of the plurality of vacuum suction rods through pipelines, the second air distribution disc is slidingly connected with the base along a first direction, the second bearing sleeve can rotate relative to the second air distribution disc, the second spring is connected between the base and the second air distribution disc, and the second spring is used to drive the second air distribution disc to abut against the second bearing sleeve so that the second air distribution disc performs vacuumizing on the second flow channels, and the second air distribution disc is identical in structure with the first air distribution disc.

[0012] In some embodiments of the present application, the neck shaping device based on thin-walled metal cans further comprises a cam in the shape of a cylinder, which is coaxially arranged on the main shaft and provided with a cam track around the main shaft, the second driving assembly comprises a guide rod and a cam bearing follower, one end of the guide rod is fixedly connected with the vacuum suction rod, the other end is provided with the cam bearing follower, the cam bearing follower is arranged on the cam track and can walk along the cam track, so that the guide rod drives the vacuum suction rod to move in the first direction, the guide rod or the vacuum suction rod is slidingly connected to the second connecting disc in the first direction.

[0013] In some embodiments of the present application, the neck shaping device based on thin-walled metal cans further comprises a yoke wheel between the first connecting disc and the second connecting disc, which is coaxially arranged on the main shaft and fixedly connected with the main shaft, the outer periphery of the yoke wheel is provided with a plurality of positioning grooves, which are uniformly arranged around the main shaft and correspondingly arranged with the plurality of can pushing assemblies, the positioning grooves penetrate through the two sides of the yoke wheel in the first direction, so as to position the thin-walled metal cans; and / or, The vacuum suction rod comprises a suction disc seat and a push rod, the suction disc seat is provided with a first air passage extending through in the first direction, the push rod extends in the first direction, the push rod is provided with a vacuum suction port and a second air passage extending in the first direction, the vacuum suction port is in communication with the second air passage and the second flow passage through the pipeline, the suction disc seat is arranged on the side of the push rod close to the shaping mold assembly in the first direction and coaxially connected with the push rod, so that the first air passage and the second air passage are communicated and form an air suction channel, the suction disc seat can contact the bottom of the thin-walled metal can and vacuum suction the thin-walled metal can; and / or, The first bearing sleeve or the second bearing sleeve or the main shaft is coaxially provided with a second gear, and the output end of the first driving assembly is connected with the second gear to drive the second gear to rotate.

[0014] In some embodiments of the present application, the ventilation shaft comprises a center shaft and an inner mold, the center shaft extends in the first direction, the center shaft is provided with a first passage extending through in the first direction, the inner mold is provided with a second passage extending through in the first direction, the inner mold is arranged on the side of the center shaft close to the can pushing assembly in the first direction and coaxially connected with the center shaft, so that the first passage and the second passage jointly form an air supply channel, the inner mold can be inserted into the thin-walled metal can, so that the outer periphery of the inner mold is arranged in close contact with the thin-walled metal can; and / or, The shaping die is rotationally connected with the sleeve, so that the shaping die can rotate around the central axis extending in the first direction, and the shaping surface is annular and extends along the outer periphery of the shaping die.

[0015] Additional features and advantages of the application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the description and claims. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of several thin-wall metal cans in the prior art; Figure 2 is a sectional view of a neck shaping device based on a thin-wall metal can in a front view according to an embodiment of the present application; Figure 3 is a structural schematic view of a neck shaping device based on a thin-wall metal can in a side view according to an embodiment of the present application; Figure 4 is a structural schematic view of a die seat assembly according to an embodiment of the present application; Figure 5 is a structural schematic view of a die seat assembly in a side view according to an embodiment of the present application; Figure 6 is a structural schematic view of a shaping die assembly according to an embodiment of the present application; Figure 7 is a structural schematic view of a shaping die assembly in a side view according to an embodiment of the present application; Figure 8 is a structural schematic view of a can pushing assembly according to an embodiment of the present application; Figure 9 is a structural schematic view of a die seat assembly, a shaping die assembly and a can pushing assembly in a pushing state according to an embodiment of the present application; Figure 10 is a structural schematic view of a die seat assembly, a shaping die assembly and a can pushing assembly in a shaping state according to an embodiment of the present application; Figure 11 is a structural schematic view of a first gas distribution plate according to an embodiment of the present application.

[0017] Reference numerals: 100, thin-walled metal can; 210, machine base; 211, guide sleeve; 221, first air distribution disc; 222, first spring; 231, main shaft; 232, first bearing sleeve; 233, first flow channel; 234, second gear; 240, gear ring; 241, support; 250, mold base assembly; 251, base; 252, central shaft; 253, first channel; 254, first gear; 255, shaft sleeve; 256, bearing seat; 257, first air vent screw; 258, inner mold; 259, positioning hole; 260, shaping mold assembly; 261, first connecting plate; 262, connecting shaft; 263, shaping mold head; 264, shaping surface; 265, second connecting plate; 270, can pushing assembly; 271, suction cup seat; 272, second air vent screw; 273, push rod; 274, guide rod; 275, cam bearing follower; 276, linear guide rail; 277, vacuum suction port; 281, first connecting disc; 282, yoke wheel; 283, second connecting disc; 284, cam; 291, second bearing sleeve; 292, second flow channel; 293, second air distribution disc; 294, second spring. DETAILED DESCRIPTION

[0018] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only for explanation of the present application, and should not be construed as limiting the present application.

[0019] In the description of the present application, it should be understood that the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0020] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] Thin-walled metal cans (including spin can, easy-open can and other can types) have good pressure resistance, sealing performance and excellent corrosion resistance, so thin-walled metal cans have been favored by the food and beverage packaging industry for a long time. In recent years, with the rapid development of the industry, the production of thin-walled metal cans has been increasing year by year, and the market share has also shown a trend of increasing year by year. At present, several kinds of thin-walled metal cans used in the market areFigure 1 As shown.

[0022] At present, most manufacturers usually adopt the following production process when producing the above-mentioned thin-wall metal cans, and the specific production process is: cupping → deep drawing → trimming → printing and coating → drying → necking → trimming → knurling → flanging and curling → packaging. Specifically, during production, first, a shallow cup is punched out on a cupping machine using a coil or a sheet, and then the shallow cup is deep drawn into a can blank with the same diameter as the finished can but slightly longer in length by using a deep drawing machine. Next, the can blank is trimmed flat at the can mouth part by a trimming machine, and then enters a printing machine for surface pattern printing and varnish coating. The dried can blank is sent into a multi-stage necking machine set to perform necking operation on the can mouth part. In the necking operation, the can mouth part can be gradually reduced in size from the same outer diameter as the can body to the required mouth size of the can body, and then the trimming, curling and flanging (or knurling) process is performed. Finally, after inspection and packaging, the entire forming process of the thin-wall metal can body is completed.

[0023] At present, in the production process of thin-wall metal cans, when the can mouth part is necked, due to the properties of the metal material itself and the forming principle, it is necessary to cooperate with a multi-stage necking machine set to gradually neck to complete the entire process. Moreover, due to mold cooperation or other reasons, there are often many annular connection marks or other shaped marks left on the necking section of the can body (i.e. the can mouth, the can mouth shoulder and other parts). However, the surface defects at these positions of the thin-wall metal can will reduce the product pass rate and the appearance quality of the can body, and also cause great hidden troubles in the sealing performance and mechanical properties of the can body.

[0024] Based on this problem, the present application provides a necking part shaping device based on a thin-wall metal can, which can effectively remove the annular connection marks or other marks on the can mouth and the can mouth shoulder of the thin-wall metal can, ensure good forming quality of the thin-wall metal can, thereby improving the product pass rate and the appearance quality of the product, and reducing the scrap rate.

[0025] Reference will now be made to Figures 1 to 11 a necking part shaping device based on a thin-wall metal can provided according to an embodiment of the present application.

[0026] As shown in Figures 1 to 11 , the necking part shaping device based on a thin-wall metal can according to the embodiment of the present application can shape the can mouth and the can mouth shoulder of the thin-wall metal can. Among them, the metal can includes a spin mouth can, a pop can or other can mouth that needs to go through a necking process, as shown in Figure 1 .

[0027] The neck shaping device based on the thin-wall metal can of the embodiment can effectively remove the annular joint marks or other indentation marks on the neck (i.e. the position of the can opening and the can opening shoulder) of the thin-wall metal can 100, ensure the good forming quality of the thin-wall metal can 100, thereby improving the product qualified rate and product appearance quality of the thin-wall metal can 100, and reducing the waste rate.

[0028] The neck shaping device based on the thin-wall metal can has a first direction, a second direction and an up-down direction, wherein the first direction, the second direction and the up-down direction are perpendicular to each other. In the embodiment, it is assumed that the first direction is the left-right direction and the second direction is the front-rear direction, at this time, the neck shaping device based on the thin-wall metal can is a horizontal structure. Of course, it is not excluded that in other embodiments, the first direction is set as the up-down direction, and the neck shaping device based on the thin-wall metal can is a vertical structure.

[0029] As shown in Figure 2 , the neck shaping device based on the thin-wall metal can includes a die seat assembly 250, a shaping die assembly 260 and a can pushing assembly 270. In the embodiment, the die seat assembly 250, the shaping die assembly 260 and the can pushing assembly 270 are sequentially arranged along the first direction.

[0030] As shown in Figure 2 , Figure 4 , Figure 5 , Figure 9 and Figure 10 , the die seat assembly 250 includes a ventilation shaft and a shaft sleeve 255, wherein the length of the ventilation shaft extends along the first direction, the ventilation shaft is hollow inside to form a gas delivery channel, the gas delivery channel extends through along the first direction, in the embodiment, the cross-sectional shape of the ventilation shaft and the gas delivery channel are both circular, one end of the gas delivery channel is a gas inlet, the gas inlet can be connected with a gas supply device such as a gas storage tank through a pipeline, so that the compressed air flows into the gas delivery channel through the gas inlet, the other end of the gas delivery channel is a gas outlet, and the compressed air in the gas delivery channel can flow out through the gas outlet.

[0031] One end of the ventilation shaft along the first direction is an insertion part, the gas outlet is located in the insertion part, and the insertion part can extend into the thin-wall metal can 100, so that the gas delivery channel delivers compressed air into the thin-wall metal can 100, and a certain air pressure is formed in the thin-wall metal can 100, thereby ensuring that the thin-wall metal can 100 is not easy to produce defects such as collapse during shaping, and protecting the shaping quality.

[0032] Specifically, the air passage shaft structure comprises a central shaft 252 and an inner mold 258. The central shaft 252 extends along a first direction, and the central shaft 252 is provided with a first channel 253 extending through along the first direction. One end of the first channel 253 is a gas inlet capable of being connected with the quick connector of the pipeline. The inner mold 258 is provided with a second channel extending through along the first direction. The inner mold 258 is arranged on the side of the central shaft 252 close to the push tank assembly 270 along the first direction, and the inner mold 258 is coaxially connected with the central shaft 252 to fix the inner mold 258 with the central shaft 252, so that the first channel 253 and the second channel are connected and form a gas supply channel together.

[0033] The inner mold 258 is in a cylindrical shape, and the inner mold 258 can be inserted into the thin-walled metal tank 100 to be arranged in abutment with the outer circumferential surface of the thin-walled metal tank 100. Specifically, the outer circumferential surface of the inner mold 258 can be in abutment with the inner circumferential surface of the tank opening of the thin-walled metal tank 100, so that the thin-walled metal tank 100 can maintain a certain air pressure after the compressed air is injected through the gas supply channel.

[0034] It can be understood that in some examples, the inner mold 258 is sleeved on the central shaft 252 and fixedly connected with the central shaft 252 by welding or threaded connection or screw connection. In other examples, the central shaft 252 is sleeved on the inner mold 258. In this embodiment, the inner mold 258 is sleeved on the central shaft 252, and a first air passage screw 257 is arranged between the inner mold 258 and the central shaft 252. The first air passage screw 257 is threadedly connected with the central shaft 252 after being sequentially inserted into the second channel and the first channel 253. At this time, the first channel 253, the air passage hole of the first air passage screw 257 and the second channel together form the gas supply channel. In this way, the inner mold 258 can be conveniently disassembled from the central shaft 252, and different sizes of inner molds 258 can be quickly replaced according to the situation of the thin-walled metal tank 100 to be shaped and processed.

[0035] The shaft sleeve 255 is coaxially arranged on the air passage shaft, and the shaft sleeve 255 is configured to rotate around the central axis extending along the first direction. It can be understood that in some embodiments, the shaft sleeve 255 is rotationally connected with the air passage shaft, and the air passage shaft can remain stationary when the shaft sleeve 255 rotates. Of course, it cannot be ruled out that in other embodiments, the shaft sleeve 255 is fixed with the air passage shaft, so that the air passage shaft rotates together with the shaft sleeve 255. In this embodiment, the cross-sectional shape of the shaft sleeve 255 is circular, and the shaft sleeve 255 is in the shape of a cylindrical step. The inner mold 258 can be partially extended out of the shaft sleeve 255. The rotation of the shaft sleeve 255 can be achieved by a gear drive or a belt drive.

[0036] As Figure 2 ,Figure 3 、 Figure 6 、 Figure 7 、 Figure 9 and Figure 10 As shown in

[0037] It can be understood that the shaping surface 264 can be a plane or a concave arc surface or a convex arc surface, which is mainly set according to the shape of the necked portion of the thin-wall metal can 100 and is not specifically limited here. For example, the shaping surface 264 is a concave arc surface, which can be shaped for the thin-wall metal can 100 as shown in Figure 1 (a). If the thin-wall metal can 100 as shown in Figure 1 (b) is shaped, the shaping surface 264 includes a concave arc surface and a convex arc surface connected to each other, so that the shaping surface 264 can be arranged in close contact with the necked portion of the thin-wall metal can 100. If the thin-wall metal can 100 as shown in Figure 1 (c) is shaped, the shaping surface 264 includes a concave arc surface and a plane connected to each other, so that the shaping surface 264 can be arranged in close contact with the necked portion of the thin-wall metal can 100.

[0038] In some examples, the shaping die head 263 is rotationally connected to the shaft sleeve 255, so that the shaping die head 263 can rotate around the central axis extending in the first direction. Therefore, when the shaft sleeve 255 rotates, all the shaping die heads 263 will revolve, and each shaping die head 263 can also rotate, so that the shaping die head 263 can roll along the necked portion of the thin-wall metal can 100, and the shaping work on the necked portion is completed by the rolling and rolling method. The shaping surface 264 is annular, and the shaping surface 264 extends along the outer periphery of the shaping die head 263. The outer contour line of the shaping die head 263 is exactly the same as the curved shape of the can opening and the can opening shoulder of the thin-wall metal can 100.

[0039] As shown in Figure 6 and Figure 10 In this embodiment, the shaping surface 264 includes a plane and a concave arc surface connected to each other, and the plane and the concave arc surface are both circular rings in the first direction. The concave arc surface is located on the right side of the plane, and the shaft sleeve 255 is located on the left side of the shaping die head 263. The shaping surface 264 can be arranged in close contact with the outer peripheral surface of the can opening and the outer peripheral surface of the can opening shoulder of the thin-wall metal can 100.

[0040] Further, the shaping die assembly 260 further comprises a first connecting plate 261, connecting shafts 262 and a second connecting plate 265, the first connecting plate 261 and the second connecting plate 265 are respectively located at two sides of the shaping die heads 263 along the first direction, the first connecting plate 261 is arranged close to the shaft sleeve 255, the number of the connecting shafts 262 is consistent with the number of the shaping die heads 263, the connecting shafts 262 extend along the first direction, the connecting shafts 262 pass through the first connecting plate 261, the shaping die heads 263 and the second connecting plate 265 in sequence and are threadedly connected with the screws on the second connecting plate 265, so as to make all the shaping die heads 263 installed on the connecting shafts 262 between the first connecting plate 261 and the second connecting plate 265. Further, a plurality of bearings are arranged between the connecting shafts 262 and the shaping die heads 263, so as to enable the shaping die heads 263 to rotate around the connecting shafts 262.

[0041] In addition, the first connecting plate 261 and the second connecting plate 265 are circular plates, and a through hole is arranged at the middle position of each of the first connecting plate 261 and the second connecting plate 265, so as to pass the inner die 258 and the thin-wall metal can 100, and enable the inner die 258 to be inserted into the thin-wall metal can 100. The first connecting plate 261 is installed on the flange end arranged on the shaft sleeve 255 by means of screws, so as to make the first connecting plate 261, the second connecting plate 265 and the shaft sleeve 255 coaxially arranged. In addition, a plurality of positioning holes 259 are arranged on the shaft sleeve 255, and the end of the connecting shaft 262 can be arranged in the positioning hole 259. When the first connecting plate 261 and the second connecting plate 265 rotate with the shaft sleeve 255, all the shaping die heads 263 on the first connecting plate 261 revolve around the rotation axis of the shaft sleeve 255.

[0042] Of course, it is not excluded that the shaping die heads 263 are fixed with the shaft sleeve 255 in some other examples, and it is also not excluded that the shaping surface 264 is arranged on the side close to the vent shaft on the circumference of the shaping die head 263.

[0043] As shown in Figure 2 , Figures 8 to 10 The push can assembly 270 is arranged in the first direction at intervals with the shaping die assembly 260, the push can assembly 270 is arranged in the first direction at intervals and in opposition with the vent shaft, and the push can assembly 270 can exert a pushing force on the bottom of the thin-wall metal can 100, the push can assembly 270 is configured to push the thin-wall metal can 100 to the shaping die assembly 260 along the first direction, so as to make the shaping surface 264 of all the shaping die heads 263 contact with the necked portion of the thin-wall metal can 100.

[0044] Specifically, the can pushing assembly 270 includes a vacuum adsorption rod and a second drive assembly. The length of the vacuum adsorption rod extends along the first direction, and the end of the vacuum adsorption rod close to the shaping mold assembly 260 along the first direction is the adsorption fixed end. The adsorption fixed end can vacuum adsorb the bottom of the thin-walled metal can 100, so that the thin-walled metal can 100 is fixed to the vacuum adsorption rod. The output end of the second drive assembly is connected to the vacuum adsorption rod. When the second drive assembly is running, the output end of the second drive assembly can be used to drive the vacuum adsorption rod to move along the first direction, so that the vacuum adsorption rod drives the thin-walled metal can 100 to move along the first direction toward or away from the shaping mold assembly 260. It can be understood that the second drive assembly can be, but is not limited to, a linear drive device such as a cylinder, an electric cylinder, a hydraulic cylinder or a linear module.

[0045] In this embodiment, if Figure 8 As shown, the vacuum adsorption rod includes a suction cup seat 271 and a push rod 273. The suction cup seat 271 is provided with a first air channel extending in a first direction. The push rod 273 is extended in the first direction. The push rod 273 is provided with a vacuum port 277 and a second air channel extending in the first direction. The vacuum port 277 is connected to the second air channel and can be connected to a vacuum device via a pipeline. The vacuum port 277 is provided on the outer circumference of the push rod 273.

[0046] The suction cup seat 271 is located on a side of the push rod 273 that is proximate to the shaping mold assembly 260 along the first direction. The suction cup seat 271 and the push rod 273 are coaxially connected, securing the suction cup seat 271 to the push rod 273. This allows the first and second air passages to communicate and form an air extraction channel. The air extraction channel opens at one end, proximate to the shaping mold assembly 260, along the first direction, as a suction port. During vacuuming, air can flow along the suction port, allowing the suction cup seat 271 to contact the bottom of the thin-walled metal can 100 and vacuum-adsorb the thin-walled metal can 100. Once the vacuum is broken, the vacuum between the vacuum rod and the thin-walled metal can 100 is released, facilitating removal of the thin-walled metal can 100.

[0047] It is understandable that the suction cup seat 271 can be fixed to the push rod 273 by welding or threaded connection. In this embodiment, a second vent screw 272 is provided between the suction cup seat 271 and the push rod 273. The second vent screw 272 passes through the first air channel and the second air channel in sequence and is threadedly connected to the push rod 273, so that the suction cup seat 271 is installed on the push rod 273. At this time, the first air channel, the vent hole of the second vent screw 272 and the second air channel together constitute an exhaust channel. This design makes it convenient and easy to disassemble and assemble the suction cup seat 271, and the suction cup seat 271 can be quickly replaced according to the bottom condition of the thin-walled metal can 100. In addition, the use of a vacuum nozzle to replace the suction cup seat 271 is not ruled out.

[0048] In some examples, when the thin-wall metal can based neck-portion reshaping device is a vertical structure or a horizontal structure, after the thin-wall metal can 100 is placed on the vacuum suction rod, the vacuum suction rod can drive the thin-wall metal can 100 to move along the first direction to the reshaping die assembly 260 under the driving of the second driving assembly. After the reshaping work is completed, the vacuum suction rod can drive the thin-wall metal can 100 to move away from the reshaping die assembly 260 along the first direction.

[0049] Of course, it is not excluded that in other embodiments, the can pushing assembly 270 includes a can pushing rod, which can move along the first direction under the action of the second driving assembly to push the thin-wall metal can 100 to the reshaping die assembly 260. In the case of a vertical structure of the thin-wall metal can based neck-portion reshaping device, the can pushing rod can lift the thin-wall metal can 100, and after the reshaping work is completed, the thin-wall metal can 100 can move downward with the can pushing rod due to its own gravity. In the case of a horizontal structure of the thin-wall metal can based neck-portion reshaping device, the can pushing rod needs to be configured with a guide seat, which is provided with a guide groove extending along the first direction, the guide groove can support and guide the thin-wall metal can 100, so that the can pushing rod pushes the thin-wall metal can 100 to the reshaping die assembly 260.

[0050] In the process of using the thin-wall metal can based neck-portion reshaping device provided by the embodiments of the present application, after the can pushing assembly 270 pushes the thin-wall metal can 100 along the first direction to the reshaping die assembly 260, the neck-portion of the thin-wall metal can 100 can be in contact with the shaping surface 264 of all the reshaping die heads 263; in the process of rotating all the reshaping die assemblies 260 by the shaft sleeve 255, all the reshaping die heads 263 can press the neck-portion of the thin-wall metal can 100 and revolve along the neck-portion of the thin-wall metal can 100, and through the multiple rolling actions of the reshaping die heads 263 on the outer circumferential surface of the neck-portion of the thin-wall metal can 100, the reshaping work on the neck-portion can be completed, so as to effectively remove the annular joint marks or other pressure marks on the neck-portion, and improve the forming quality and appearance quality of the thin-wall metal can 100; at the same time, since one end of the venting shaft of the die seat assembly 250 can extend into the thin-wall metal can 100, so that the compressed air can flow into the thin-wall metal can 100 through the air supply channel, the collapse deformation of the thin-wall metal can 100 during the reshaping process can be effectively avoided through the air pressure action, so as to ensure good reshaping effect of the thin-wall metal can 100.

[0051] The die seat assembly 250, the reshaping die assembly 260 and the can pushing assembly 270 together form a reshaping mechanism, and the reshaping mechanism is provided with one reshaping station. The reshaping mechanism can be provided with one or more than one.

[0052] In some embodiments, as shown in FIG. 1, the die seat assembly 250 is provided with a plurality of die seats 251, and each die seat 251 is provided with a plurality of die seats 251. Figure 2 、 Figure 3 ,Figure 4 、 Figures 8 to 10 As shown, the neck shaping device for thin-walled metal cans further includes a base 210, a main shaft 231, a first connecting plate 281, and a second connecting plate 283. The main shaft 231 extends along a first direction and is mounted on and fixedly connected to the base 210. The first connecting plate 281 and the second connecting plate 283 are spaced apart along the first direction and are coaxially mounted on the main shaft 231, such that the first connecting plate 281 and the second connecting plate 283 are fixed relative to the main shaft 231.

[0053] Multiple die base assemblies 250 are provided and are evenly arranged around the main shaft 231. Multiple pusher assemblies 270 are also provided and are evenly arranged around the main shaft 231. Multiple shaping die assemblies 260 are provided and are evenly arranged around the main shaft 231. The die base assemblies 250, pusher assemblies 270, and shaping die assemblies 260 are identical in number. The shaping die assemblies 260 are arranged in a one-to-one correspondence with the die base assemblies 250, with each shaping die assembly 260 mounted on a corresponding die base assembly 250. The mold base assembly 250 is arranged on the first connecting plate 281. Specifically, the mold base assembly 250 is fixed to the outer peripheral surface of the first connecting plate 281 by screws, so that the first connecting plate 281 provides support and installation position for the mold base assembly 250; the push tank assembly 270 is arranged on the second connecting plate 283. Specifically, the push rod 273 can be installed on the linear guide rail 276 provided on the outer peripheral surface of the second connecting plate 283 through a slider, so that the second connecting plate 283 provides support and installation position for the push tank assembly 270.

[0054] It is understood that, at this time, the base 210 is equipped with a plurality of shaping mechanisms arranged in a circumferential manner, providing a plurality of shaping stations, which can process the shaping work of a plurality of thin-walled metal cans 100 at the same time. Moreover, the neck shaping device based on the thin-walled metal can can be a vertical structure or a horizontal structure. The first connecting plate 281 and the second connecting plate 283 can be a disc. The number of shaping mechanisms can be selected according to actual conditions. In this embodiment, if Figure 3 As shown, there are 12 shaping mechanisms in total.

[0055] Further, such as Figure 2 and Figure 4 As shown, the neck-shrinkage shaping device based on a thin-walled metal can further includes a first driving assembly and a ring gear 240 .

[0056] The mold base assembly 250 further comprises a base 251 and a first gear 254. The ventilation shaft is fixed on the base 251. The shaft sleeve 255 is rotatably connected with the base 251. Specifically, the shaft sleeve 255 can be installed on the base 251 through the bearing seat 256. The base 251 is fixedly installed on the first connecting disc 281. The first gear 254 is coaxially arranged on the shaft sleeve 255 and is fixedly connected with the shaft sleeve 255, so that the first gear 254 can rotate synchronously with the shaft sleeve 255.

[0057] The gear ring 240 is fixedly arranged on the machine base 210. Specifically, the machine base 210 is provided with a support 241. The gear ring 240 is fixed on the support 241 through bolts. The gear ring 240 is meshingly connected with all the first gears 254. The main shaft 231 is rotatably connected with the machine base 210 through bearings. The rotation axis of the main shaft 231 extends along the first direction. The first connecting disc 281 and the second connecting disc 283 are fixedly connected with the main shaft 231 and can rotate with the main shaft 231, so that the mold base assembly 250, the pushing tank assembly 270 and the shaping mold assembly 260 can rotate synchronously. The output end of the first driving assembly is connected with the main shaft 231. The first driving assembly is used for driving the main shaft 231 to rotate.

[0058] It can be understood that the first driving assembly can comprise a motor and a transmission structure, which can be a shaft coupling, a gear transmission mechanism or a belt transmission mechanism. The gear ring 240 can be an outer gear ring or an inner gear ring. In this embodiment, the gear ring 240 is an inner gear ring. All the first gears 254 are located in the inner periphery of the gear ring 240. When the main shaft 231 rotates under the driving action of the first driving assembly, the main shaft 231 can drive the first connecting disc 281 and the second connecting disc 283 to rotate, so as to promote the mold base assembly 250, the pushing tank assembly 270 and the shaping mold assembly 260 to revolve synchronously. At this time, since all the first gears 254 are meshingly connected with the gear ring 240, the first gears 254 can roll along the gear ring 240. Therefore, the first gears 254 can drive the shaft sleeves 255 and the shaping mold assemblies 260 thereon to rotate around their own axes, so that the shaping die head 263 can exert the rolling shaping action on the necking portion of the thin-wall metal tank 100. In this way, it is not necessary to set an electrically controlled rotary driving mechanism for each shaft sleeve 255, the number of components to be set is reduced, the structure is more compact, the control strategy is simplified, and the manufacturing cost is reduced.

[0059] Further, as shown in Figure 2 The first bearing sleeve 232, the first gas distribution disc 221 and the first spring 222 are further arranged on the thin-wall metal tank necking portion shaping device.

[0060] The first bearing sleeve 232 is coaxially arranged on the main shaft 231, and the first bearing sleeve 232 is fixedly connected with the main shaft 231, the first bearing sleeve 232 can rotate with the main shaft 231, and the first bearing sleeve 232 is rotationally connected with the base 210 through a bearing. The first bearing sleeve 232 is provided with a plurality of first flow channels 233, the plurality of first flow channels 233 are uniformly arranged around the main shaft 231, and the plurality of first flow channels 233 are respectively and correspondingly arranged with the plurality of air feeding channels and are in communication through pipelines. The first flow channel 233 can be L-shaped or straight. In the embodiment, the first flow channel 233 is L-shaped.

[0061] The first air distribution disc 221 is slidingly connected with the base 210 in the first direction. Specifically, the base 210 is provided with a guide sleeve 211, and the first air distribution disc 221 is provided with a center hole, so that the first air distribution disc 221 can be sleeved on the guide sleeve 211, and the first air distribution disc 221 can be stably moved in the first direction under the guidance of the guide sleeve 211. The first air distribution disc 221 can be connected with a gas supply device through a gas supply pipeline. The first air distribution disc 221 is located on the side of the first bearing sleeve 232 away from the shaping mold assembly 260 in the first direction.

[0062] The first bearing sleeve 232 can rotate relative to the first air distribution disc 221, and the first air distribution disc 221 can remain in a fixed state during rotation of the first bearing sleeve 232. The first spring 222 can be stretched and contracted in the first direction, and the first spring 222 is connected between the base 210 and the first air distribution disc 221. The first spring 222 is used to drive the first air distribution disc 221 to abut against the first bearing sleeve 232, so that the first air distribution disc 221 can supply compressed air to the first flow channel 233 during rotation of the first bearing sleeve 232, and the compressed air flows into the air feeding channel through the first flow channel 233.

[0063] It can be understood that the number of the first spring 222 is not limited to one. When a plurality of first springs 222 are provided, the plurality of first springs 222 are circumferentially arranged around the main shaft 231. In this way, the problem of easy winding of the gas supply pipeline can be well solved while providing compressed air to the air feeding channel, so that the main shaft 231 can continuously rotate in the same direction without switching the rotation direction. The first spring 222 can ensure that the first air distribution disc 221 remains in a fixed state during rotation of the first bearing sleeve 232, and can always abut against the end face of the first bearing sleeve 232 in the first direction, thereby ensuring that the first air distribution disc 221, the first flow channel 233, the air feeding channel and the inner cavity of the thin-walled metal can 100 are always in communication during the shaping work.

[0064] In some embodiments, as Figure 11As shown, the first air distribution disc 221 is provided with a first air distribution port and a first air guide groove. In the first direction, the first air guide groove is in the shape of a circular arc. The first air guide groove penetrates through the first air distribution disc 221 and is close to one end surface of the first bearing sleeve 232 in the first direction. The first air distribution port and the first air guide groove are in communication with each other. Moreover, the center of the first air guide groove coincides with the center of the first bearing sleeve 232. When the first bearing sleeve 232 rotates, part of the first flow channel 233 is in communication with the first air guide groove.

[0065] It can be understood that the central angle of the first air guide groove can be set according to actual needs, and is not specifically limited here. The first air distribution port can be arranged on the outer circumferential surface of the first air distribution disc 221, so as to be connected with the quick connector of the air supply pipeline. The first air distribution disc 221 adopts the first air guide groove with the above structure, so as to control the distribution area and on-off of compressed air in the range of 360° along the axis of the main shaft 231.

[0066] Specifically, in the process of rotation of the first bearing sleeve 232, part of the first flow channel 233 can be in communication with the first air guide groove, so that compressed air can flow into the thin-walled metal tank 100, so that the thin-walled metal tank 100 maintains a certain air pressure during shaping, and ensures that the thin-walled metal tank 100 will not collapse. At the same time, another part of the first flow channel 233 is not in communication with the first air guide groove, so that compressed air cannot flow into the thin-walled metal tank 100. At this time, the thin-walled metal tank 100 is in an unshaped state or a shaped state, so as to realize automatic air supply control of the air supply channel, so as to realize loading, shaping and unloading work. When the air supply channel is in a stop air supply state and the thin-walled metal tank 100 has completed the shaping work, the second driving assembly can drive the vacuum suction rod to move in the first direction, so that the vacuum suction rod can drive the thin-walled metal tank 100 to move away from the shaping mold assembly 260, so as to perform unloading work.

[0067] Further, as shown in Figure 2 The neck shaping device for the thin-walled metal tank further comprises a second bearing sleeve 291, a second air distribution disc 293 and a second spring 294.

[0068] The second bearing sleeve 291 is arranged on the main shaft 231 coaxially with the shaft sleeve 255. The second bearing sleeve 291 is fixedly connected with the main shaft 231 and can rotate with the main shaft 231. The second bearing sleeve 291 is rotationally connected with the machine base 210 through a bearing. The second bearing sleeve 291 and the first bearing sleeve 232 are respectively located at two ends of the main shaft 231 in the first direction. The first connecting disc 281 and the second connecting disc 283 are both located between the first bearing sleeve 232 and the second bearing sleeve 291.

[0069] The second bearing sleeve 291 is provided with a plurality of second flow channels 292, which are uniformly arranged around the main shaft 231, and each of the plurality of second flow channels 292 is provided in one-to-one correspondence with the inside of the plurality of vacuum adsorption rods and is connected through a pipeline. Specifically, the vacuum port 277 of the push rod 273 is connected through a pipeline with the second flow channel 292. The second flow channel 292 can be L-shaped or long and straight. In this embodiment, the second flow channel 292 is L-shaped.

[0070] The second gas distribution plate 293 is slidingly connected with the base 210 along the first direction. Specifically, the base 210 is further provided with another guide sleeve 211, and the second gas distribution plate 293 is provided with a central hole, so that the second gas distribution plate 293 can be sleeved on the guide sleeve 211, allowing the second gas distribution plate 293 to move smoothly along the first direction under the guidance of the guide sleeve 211. The second gas distribution plate 293 can be connected with the vacuum equipment through the air exhaust pipeline. The second gas distribution plate 293 is located on the side of the second bearing sleeve 291 away from the push tank assembly 270 along the first direction.

[0071] The second bearing sleeve 291 can rotate relative to the second gas distribution plate 293. During the rotation of the second bearing sleeve 291, the second gas distribution plate 293 can remain stationary. The second spring 294 can be extended and retracted along the first direction, and the second spring 294 is connected between the base 210 and the second gas distribution plate 293. The second spring 294 is used to drive the second gas distribution plate 293 to abut against the second bearing sleeve 291, so that the second gas distribution plate 293 can perform vacuumization for the second flow channel 292 during the rotation of the second bearing sleeve 291, allowing the vacuum adsorption rod to perform vacuum adsorption on the thin-walled metal tank 100.

[0072] It can be understood that the number of second springs 294 is not limited to one. When a plurality of second springs 294 are provided, the plurality of second springs 294 are arranged in a circumferential direction along the circumference of the main shaft 231. Such design can solve the problem of easy winding of the air exhaust pipeline while achieving vacuumization of the air exhaust channel, allowing the main shaft 231 to continuously rotate in the same direction without frequent changes in the rotation direction. The provision of the second spring 294 can ensure that the second gas distribution plate 293 remains stationary during the rotation of the second bearing sleeve 291 and is always pressed against the end face of the second bearing sleeve 291 along the first direction, thereby ensuring that the second gas distribution plate 293, the second flow channel 292, the air exhaust channel, and the inner cavity of the thin-walled metal tank 100 are always connected during the shaping work.

[0073] In this embodiment, the second gas distribution plate 293 is provided with a second gas distribution port and a second air guide groove, as shown in Figure 2As shown, the structure of the second air distribution disc 293 is consistent with that of the first air distribution disc 221, which will not be described here. When the second bearing sleeve 291 rotates, part of the second flow channel 292 communicates with the second air guide groove.

[0074] It can be understood that the central angle of the second air guide groove can be set according to actual needs, which is not specifically limited here. The second air distribution port can be provided on the outer circumferential surface of the second air distribution disc 293 to connect with the quick connector of the air suction pipeline. The second air distribution disc 293 adopts the second air guide groove with the above structure, which can control the distribution area and on-off of the negative pressure air flow within the 360° range along the axis of the main shaft 231.

[0075] Specifically, during the rotation of the second bearing sleeve 291, part of the second flow channel 292 can communicate with the second air guide groove, so that the vacuum suction rod can exert a vacuum suction effect on the bottom of the thin-walled metal tank 100, so that the thin-walled metal tank 100 is fixed relative to the vacuum suction rod; At the same time, another part of the second flow channel 292 does not communicate with the second air guide groove, so that the vacuum suction rod loses the vacuum suction effect, so as to realize the automatic vacuum suction control of the air suction channel, facilitate the transfer of the thin-walled metal tank 100 to the vacuum suction rod, or transfer away from the vacuum suction rod, so as to be able to carry out the feeding work and the discharging work.

[0076] When the air supply channel is in a stop air supply state, and the thin-walled metal tank 100 has completed the shaping work, the second driving assembly can drive the vacuum suction rod to move in the first direction, so that the vacuum suction rod can drive the thin-walled metal tank 100 away from the shaping mold assembly 260, so as to carry out the discharging work. When the second connecting disc 283 drives the vacuum suction rod to rotate from the discharging station to the feeding station, the vacuum suction rod is in a stop vacuum suction state. When the second connecting disc 283 drives the vacuum suction rod to rotate from the feeding station to the discharging station, the vacuum suction rod is in a vacuum suction state.

[0077] In this embodiment, as shown in Figure 2 The neck shaping device for the thin-walled metal tank further comprises a cam 284 in a cylindrical shape.

[0078] The cam 284 is fixed on the base 210 and coaxially arranged with the main shaft 231, and the cam 284 is provided with a cam track which is arranged around the main shaft 231. The second driving assembly comprises a guide rod 274 and a cam bearing follower 275. The guide rod 274 extends in the first direction, and one end of the guide rod 274 is fixedly connected with the vacuum adsorption rod by a bolt, and the other end of the guide rod 274 is provided with the cam bearing follower 275, and the central axis of the cam bearing follower 275 is perpendicular to the first direction, and the cam bearing follower 275 is rotationally connected with the guide rod 274, so that the cam bearing follower 275 can rotate relative to the guide rod 274. The cam bearing follower 275 is arranged on the cam track, and the cam bearing follower 275 can walk along the cam track, so that the guide rod 274 drives the vacuum adsorption rod to move back and forth in the first direction, so that the vacuum adsorption rod can drive the thin-wall metal can 100 to approach the shaping die assembly 260 in the first direction, and can drive the thin-wall metal can 100 to move away from the shaping die assembly 260 in the first direction.

[0079] In some examples, the vacuum adsorption rod is slidingly connected with the second connecting disc 283 in the first direction, and specifically, the vacuum adsorption rod is provided with a sliding block, and the second connecting disc 283 is provided with a linear guide rail 276 extending in the first direction, and the sliding block is slidingly connected with the linear guide rail 276, so as to improve the stability and accuracy of the linear movement of the vacuum adsorption rod in the first direction. In other examples, the guide rod 274 is slidingly connected with the second connecting disc 283 in the first direction.

[0080] It can be understood that when the main shaft 231 rotates under the driving action of the first driving assembly, the main shaft 231 can drive the first connecting disc 281 and the second connecting disc 283 to rotate in the same direction, so that the mold base assembly 250, the can pushing assembly 270 and the shaping die assembly 260 can synchronously revolve, and at this time, since the cam bearing follower 275 in each can pushing assembly 270 rolls and walks along the cam track, under the curve guiding action of the cam track, the cam bearing follower 275 can drive the guide rod 274 and the vacuum adsorption rod to move back and forth in the first direction, so as to realize the linear movement control of the vacuum adsorption rod, so as to perform the feeding, shaping and discharging work of the thin-wall metal can 100, so that the second driving assembly with electric control does not need to be arranged for each vacuum adsorption rod, the structure is more compact, the control strategy is simplified, and the manufacturing cost is reduced.

[0081] In the embodiment, as Figure 2As shown, the first bearing sleeve 232 is coaxially provided with a second gear 234, the second gear 234 is fixedly connected with the first bearing sleeve 232, the output end of the first driving assembly is connected with the second gear 234, and when the first driving assembly is running, the output end of the first driving assembly can drive the second gear 234 to rotate, so as to realize the rotation of the main shaft 231. The first driving assembly comprises a motor and a transmission gear, the output shaft of the motor is connected with the transmission gear, and the transmission gear is engagedly connected with the second gear 234.

[0082] Of course, it is not excluded that the second gear 234 is coaxially arranged on the second bearing sleeve 291 or the main shaft 231 in other embodiments.

[0083] In some embodiments, as Figure 2 As shown, the neck shaping device based on the thin-wall metal can further comprises a fork wheel 282. Among them, the fork wheel 282 is located between the first connecting disc 281 and the second connecting disc 283, the fork wheel 282 is coaxially arranged on the main shaft 231, and the fork wheel 282 is fixedly connected with the main shaft 231, so that the fork wheel 282 can rotate with the main shaft 231.

[0084] The outer circumferential surface of the fork wheel 282 is inwardly recessed to form a plurality of positioning grooves, the positioning grooves can exert a positioning effect on the thin-wall metal can 100, the plurality of positioning grooves are uniformly arranged around the main shaft 231, and the plurality of positioning grooves are one-to-one corresponding to the plurality of can pushing assemblies 270. The positioning grooves penetrate through the two side faces of the fork wheel 282 in the first direction, so as to position the thin-wall metal can 100. The positioning grooves can be circular arc grooves, which can be matched with the outer circumferential surface of the thin-wall metal can 100.

[0085] It can be understood that the same number of semicircular positioning grooves are uniformly arranged on the circumference of the fork wheel 282 corresponding to the position of each can pushing assembly 270, and when the thin-wall metal can 100 enters the feeding station or exits the discharging station, the fork wheel 282 can exert a positioning effect on the thin-wall metal can 100.

[0086] In the case that the neck shaping device based on the thin-wall metal can in the above embodiment provides a plurality of shaping stations, the use process is as follows: When the main shaft 231 rotates, the mold base assembly 250, the shaping mold assembly 260 and the push-can assembly 270 all revolve with the main shaft 231. In the process of the revolution of the mold base assembly 250, the first gear 254 rotates at high speed around its own central axis due to the meshing connection with the gear ring 240, and drives the shaft sleeve 255 and the shaping mold assembly 260 to rotate at high speed around the central axis of the shaft sleeve 255. When the shaping mold assembly 260 rotates at high speed around the central axis of the shaft sleeve 255, the shaping die head 263 will press the can opening shoulder of the thin-walled metal can 100 and rotate at high speed around the axis of the thin-walled metal can 100; at this time, the can opening shoulder is subjected to multiple rolling effects by the shaping die head 263 to achieve the shaping effect of the can opening shoulder. In the shaping process, the inner mold 258 extends into the thin-walled metal can 100 and air is supplied to prevent the thin-walled metal can 100 from being deformed due to the internal air pressure during the shaping process, thereby ensuring good shaping effect.

[0087] At the same time, in the process of the revolution of the push-can assembly 270, the cam bearing follower 275 can drive the guide rod 274 and the vacuum suction rod to move back and forth in a straight line along the first direction under the guidance of the cam track, so that the vacuum suction rod can perform the actions of entering the can, shaping and exiting the can. Moreover, when the vacuum suction rod contacts the bottom of the thin-walled metal can 100, the vacuum suction rod is subjected to vacuumizing treatment, and the bottom of the thin-walled metal can 100 is driven to be adsorbed on the vacuum suction rod by the negative pressure airflow, so as to ensure that the vacuum suction rod successfully completes the feeding of the thin-walled metal can 100 at the feeding position (i.e., the entering position), and the thin-walled metal can 100 will not follow the rotation of the shaping die head 263 during the shaping process.

[0088] When the vacuum suction rod is at the entering position, the relative positions of the mold base assembly 250, the shaping mold assembly 260 and the push-can assembly 270 are as shown in Figure 9 When the vacuum suction rod is at the shaping interval, the relative positions of the mold base assembly 250, the shaping mold assembly 260 and the push-can assembly 270 are as shown in Figure 10

[0089] It can be understood that when the thin-walled metal can neck shaping device provides multiple shaping stations and the push-can assembly 270 includes a vacuum suction rod, the thin-walled metal can neck shaping device can be designed as a vertical structure or a horizontal structure.

[0090] ​In the description of the specification, reference to "one embodiment", "some embodiments", "an exemplary embodiment", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "in an exemplary embodiment", "an example", "a specific example", or "some examples" in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0091] Although embodiments of the application have been shown and described, it will be appreciated that those skilled in the art can make various changes, modifications, substitutions and alterations thereto without departing from the principles and scope of the application, which are defined by the claims and their equivalents.

Claims

1. A neck shaping device based on a thin-walled metal can, characterized in that: include: A mold base assembly includes a vent shaft extending in a first direction and a sleeve, the vent shaft being provided with an air supply passage extending in the first direction, one end of the vent shaft extending in the first direction being capable of extending into the thin-walled metal can so that the air supply passage allows compressed air to flow into the thin-walled metal can, the sleeve being coaxially sleeved on the vent shaft and being configured to rotate about its own central axis extending in the first direction; A shaping die assembly is provided on the shaft sleeve, the shaping die assembly includes at least two shaping die heads, all of which are evenly arranged along the circumference of the vent shaft, and the shaping die heads are provided with shaping surfaces for shaping the neck portion of the thin-walled metal can; A can pushing assembly is arranged opposite to the vent shaft along a first direction. The can pushing assembly is configured to push the thin-walled metal can toward the shaping die assembly along the first direction so that the shaping surfaces of all the shaping die heads contact the neck portion of the thin-walled metal can.

2. The neck shaping device based on a thin-walled metal can according to claim 1, characterized in that: It also includes a machine base, a main shaft, a first connecting plate and a second connecting plate. The main shaft extends along the first direction and is arranged on the machine base. The first connecting plate and the second connecting plate are arranged at intervals along the first direction and are coaxially arranged on the main shaft. There are multiple mold base assemblies and multiple push-can assemblies, and they are evenly arranged around the main shaft. The mold base assembly is arranged on the first connecting plate, and the push-can assembly is arranged on the second connecting plate. There are multiple shaping mold assemblies, and they are respectively arranged in a one-to-one correspondence with the multiple mold base assemblies.

3. The neck shaping device based on a thin-walled metal can according to claim 2, characterized in that: It also includes a first drive assembly and a ring gear. The mold base assembly also includes a base and a first gear. The vent shaft is fixedly arranged on the base. The sleeve is rotatably connected to the base. The first gear is coaxially sleeved on the sleeve and fixedly connected to the sleeve. The ring gear is arranged on the machine base and meshes with all the first gears. The main shaft is rotatably connected to the machine base. The first connecting disk and the second connecting disk are both fixedly connected to the main shaft. The first drive assembly is used to drive the main shaft to rotate.

4. The neck shaping device based on a thin-walled metal can according to claim 3, characterized in that: It also includes a first bearing sleeve, a first air distribution disc and a first spring. The first bearing sleeve is coaxially sleeved on the main shaft and fixedly connected to the main shaft. The first bearing sleeve is rotatably connected to the machine base. The first bearing sleeve is provided with a plurality of first flow channels. The plurality of first flow channels are evenly arranged around the main shaft and are respectively connected to the plurality of air supply channels through pipelines. The first air distribution disc is slidably connected to the machine base along a first direction. The first bearing sleeve can rotate relative to the first air distribution disc. The first spring is connected between the machine base and the first air distribution disc. The first spring is used to drive the first air distribution disc to abut against the first bearing sleeve so that the first air distribution disc can pass compressed air into the first flow channel.

5. The neck shaping device based on a thin-walled metal can according to claim 4, characterized in that: The first air distribution disc is provided with a first air distribution port and a first air guide groove in a circular arc shape. The first air distribution port is connected to the first air guide groove. The center position of the first air guide groove coincides with the center position of the first bearing sleeve. When the first bearing sleeve rotates, part of the first flow channel is connected to the first air guide groove.

6. The neck shaping device based on a thin-walled metal can according to claim 4 or 5, characterized in that: The pushing can assembly includes a vacuum adsorption rod and a second driving assembly. The vacuum adsorption rod extends along a first direction. The vacuum adsorption rod can vacuum adsorb the bottom of the thin-walled metal can along the first direction near one end of the shaping mold assembly. The second driving assembly is used to drive the vacuum adsorption rod to move along the first direction.

7. The neck shaping device based on a thin-walled metal can according to claim 6, characterized in that: It also includes a second bearing sleeve, a second air distribution disc and a second spring. The second bearing sleeve is coaxially sleeved on the main shaft and fixedly connected to the main shaft. The second bearing sleeve is rotatably connected to the machine base. The second bearing sleeve is provided with multiple second flow channels. The multiple second flow channels are evenly arranged around the main shaft and are respectively connected to the interior of the multiple vacuum adsorption rods through pipelines. The second air distribution disc is slidably connected to the machine base along the first direction. The second bearing sleeve can rotate relative to the second air distribution disc. The second spring is connected between the machine base and the second air distribution disc. The second spring is used to drive the second air distribution disc to abut against the second bearing sleeve so that the second air distribution disc can vacuum the second flow channel. The second air distribution disc has the same structure as the first air distribution disc.

8. The neck shaping device based on a thin-walled metal can according to claim 7, characterized in that: It also includes a cylindrical cam, which is arranged on the machine base and coaxially with the main shaft. The cam is provided with a cam track arranged around the main shaft. The second driving assembly includes a guide rod and a cam bearing follower. One end of the guide rod is fixedly connected to the vacuum adsorption rod, and the other end is provided with the cam bearing follower. The cam bearing follower is provided on the cam track and can move along the cam track so that the guide rod drives the vacuum adsorption rod to move in the first direction. The guide rod or the vacuum adsorption rod is slidably connected to the second connecting plate along the first direction.

9. The neck shaping device based on a thin-walled metal can according to claim 8, characterized in that: It also includes a shift fork wheel, the shift fork wheel is located between the first connecting plate and the second connecting plate, the shift fork wheel is coaxially arranged on the main shaft and fixedly connected to the main shaft, the outer peripheral surface of the shift fork wheel is provided with a plurality of positioning grooves, the plurality of positioning grooves are evenly arranged around the main shaft and are arranged in a one-to-one correspondence with the plurality of push can assemblies, the positioning grooves pass through the two side surfaces of the shift fork wheel along the first direction, so as to be used for positioning the thin-walled metal can; and / or, The vacuum adsorption rod includes a suction cup seat and a push rod, the suction cup seat is provided with a first air channel extending through along a first direction, the push rod extends along the first direction, the push rod is provided with a vacuum port and a second air channel extending along the first direction, the vacuum port is communicated with the second air channel, and is communicated with the second flow channel through a pipeline, the suction cup seat is provided on a side of the push rod close to the shaping mold assembly along the first direction, and is coaxially connected to the push rod so that the first air channel and the second air channel are communicated and form an air extraction channel, the suction cup seat can contact the bottom of the thin-walled metal can and vacuum adsorb the thin-walled metal can; and / or, The first bearing sleeve or the second bearing sleeve or the main shaft is coaxially provided with a second gear, and the output end of the first driving component is connected to the second gear to drive the second gear to rotate.

10. The neck shaping device based on a thin-walled metal can according to claim 1, characterized in that: The ventilation shaft includes a central shaft and an inner mold, the central shaft extends along a first direction, the central shaft is provided with a first channel extending through the first direction, the inner mold is provided with a second channel extending through the first direction, the inner mold is provided on a side of the central shaft close to the push can assembly along the first direction, and is coaxially connected to the central shaft so that the first channel and the second channel together form an air supply channel, and the inner mold can be inserted into a thin-walled metal can so that the outer peripheral surface of the inner mold is fitted with the thin-walled metal can; and / or, The shaping die is rotatably connected to the shaft sleeve so that the shaping die can rotate around its own central axis extending along the first direction. The shaping surface is annular and extends along the outer circumference of the shaping die.

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