CN116175326A

CN116175326A - Edge trimming device for formed metal bottle cap

Info

Publication number: CN116175326A
Application number: CN202310469321.5A
Authority: CN
Inventors: 张青山; 张豪美; 王瀚玉
Original assignee: Yantai Boya Packaging Co ltd
Current assignee: Yantai Boya Packaging Co ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-05-30
Anticipated expiration: 2043-04-27
Also published as: CN116175326B

Abstract

The invention belongs to the technical field of bottle cap processing, in particular to an edge trimming device for a formed metal bottle cap, which comprises a chain plate conveyor, wherein a conveying chain plate is arranged on the chain plate conveyor, the conveying chain plate is connected together in a head-to-tail hinged mode by a plurality of chain plate main bodies to form a closed loop, a bracket is fixedly arranged on one side of the chain plate conveyor, an electric linear module is fixedly arranged at the top of the bracket, a transverse frame is fixedly arranged on a sliding block of the electric linear module, a motor is fixedly arranged on the transverse frame in a penetrating mode, and a polishing mechanism for chamfering and polishing bottle cap edges with different diameters is fixedly arranged at the end part of an output shaft of the motor. According to the bottle cap clamping device, bottle caps with different diameters can be clamped and fixed through the cooperation of the downward-moving polishing mechanism and the clamping assembly under the bottle cap clamping device, so that the polished bottle caps can be freely separated from the clamping assembly in the process of being conveyed to an opening by the conveying chain plate from upward to downward, and the whole blanking process does not need to be manually participated.

Description

Edge trimming device for formed metal bottle cap

Technical Field

The invention relates to the technical field of bottle cap processing, in particular to an edge trimming device for a formed metal bottle cap.

Background

The metal bottle cap is generally formed by one-step stamping through stamping equipment, metal wire drawing or burrs can exist at the broken edges of the metal bottle cap after forming, sharp corners can exist at the bent edges, if subsequent product packaging cannot be conducted without grinding, fingers of workers or consumers are easy to cut, the edges of the bottle caps with different diameters cannot be ground through existing grinding equipment, universality is poor, unloading cannot be automatically completed after grinding, the ground bottle caps are taken out from the grinding equipment manually or by a machine, and the edge trimming device for the formed metal bottle cap is troublesome.

Disclosure of Invention

The invention provides an edge trimming device for a formed metal bottle cap, which aims to solve the defects in the prior art.

In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides an edge trimming device of shaping metal bottle lid, includes the drag chain conveyer, be equipped with the transport drag chain on the drag chain conveyer, the transport drag chain is in the same place and constitutes the closed loop by a plurality of drag chain main part head and the tail articulates, one side fixed mounting of drag chain conveyer has the support, the top fixed mounting of support has electronic sharp module, fixed mounting has the crossbearer on the slider of electronic sharp module, run through fixed mounting has the motor on the crossbearer, the output shaft end fixed mounting of motor has the polishing mechanism who carries out the chamfer to the bottle lid edge of different diameters, the drag chain main part is in the transport drag chain on the closed loop outside fixed mounting has installation mechanism, install the clamping assembly who carries out centre gripping fixed to different diameter bottle lids on the installation mechanism.

Preferably, the polishing mechanism comprises a transverse plate fixedly connected with the end part of the output shaft of the motor, two mounting seats are fixedly arranged at the bottom of the transverse plate, two moving blocks are slidably arranged at the bottom of the transverse plate and located between the two mounting seats, the two mounting seats are penetrated and rotatably provided with the same screw rod, the screw rod penetrates through the two moving blocks and is connected with the two moving blocks in a threaded manner, a guide rod is fixedly arranged between the two mounting seats, the guide rod penetrates through the two moving blocks and is connected with the two moving blocks in a sliding manner, two polishing pieces are fixedly arranged at the bottom of the moving blocks, four polishing pieces at the bottoms of the two moving blocks are located on the same straight line, and the straight line where the four polishing pieces are located is perpendicular to the axis of the output shaft of the motor.

Preferably, the polishing pieces are in an inverted cone shape, and an inverted V-shaped polishing area is formed between two polishing pieces at the bottom of the same moving block.

Preferably, two sections of threads with opposite screwing directions are arranged on the screw rod, the two moving blocks are respectively matched with the threads with corresponding screwing directions, knobs are fixedly arranged at two ends of the screw rod, two locking bolts penetrate through the threads on the knobs, and the end parts of the locking bolts are abutted to the mounting seats.

Preferably, the bottom fixed mounting of diaphragm has the elastic expansion link, the elastic expansion link is located between grinding member and the guide arm, and the elastic expansion link sets up with the motor is coaxial, the piston rod tip of elastic expansion link rotates installs the turning block.

Preferably, the installation mechanism comprises a connecting plate fixedly installed on the chain plate main body, a first cylinder is fixedly installed at the top of the connecting plate, the clamping assembly comprises a first disc fixedly connected with the inner wall of the first cylinder, a plurality of clamping mechanisms which are in rectangular distribution are installed on the first disc in a penetrating and sliding manner, the moving route of the clamping mechanisms coincides with the diameter line of the first disc, a second disc is installed under the first disc in a rotating manner, and the second disc in the rotating manner drives the clamping mechanisms to gather together or keep away from each other simultaneously.

Preferably, the second disc is fixedly provided with a second cylinder in a penetrating manner, the second cylinder penetrates through the second disc and is connected with the second disc in a rotating manner, the third cylinder is movably arranged in the second cylinder, the third disc is fixedly arranged at the top end of the third cylinder, the inner wall of the second cylinder is provided with a plurality of spiral guide grooves distributed in a circumferential array manner, and the outer side of the third cylinder is fixedly provided with a plurality of spiral guide ribs matched with the plurality of spiral guide grooves.

Preferably, a plurality of springs which are distributed in a rectangular shape are fixedly arranged at the bottom of the cylinder III, and the bottom ends of the springs are fixedly connected with the top of the connecting plate.

Preferably, the clamping mechanism comprises a displacement block, a second limiting block and a first limiting block are fixedly arranged at the top and the bottom of the displacement block respectively, a clamping plate is fixedly arranged at one side, close to the center of a circle, of the second limiting block, a guide wheel is rotatably arranged at the bottom of the first limiting block, a plurality of first guide holes distributed in a circumferential array are formed in the first circular plate, the displacement blocks on the plurality of clamping mechanisms are respectively and slidably arranged in the corresponding first guide holes, the top and the bottom of the displacement block are respectively flush with the top and the bottom of the first circular plate, a plurality of second guide holes distributed in a circumferential array are formed in the second circular plate, and the guide wheels on the plurality of clamping mechanisms are respectively and rotatably arranged in the corresponding second guide holes.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the edges of bottle caps with different diameters can be chamfered and polished through the rotary polishing mechanism, and the inverted V-shaped polishing area is formed between two polishing pieces at the bottom of the same moving block, so that bottle caps with different intervals between the edge a and the edge b can be chamfered and polished;

2. the bottle caps with different diameters can be clamped and fixed by matching the downward-moving polishing mechanism with the clamping assembly under the downward-moving polishing mechanism, so that the bottle caps after polishing can be freely separated from the clamping assembly in the process that the opening is changed from upward to downward by conveying chain plates, and the whole blanking process does not need manual participation.

Drawings

FIG. 1 is a schematic view of the whole structure of an edge trimming device for forming a metal bottle cap according to the present invention;

FIG. 2 is a schematic view of an edge finishing apparatus for forming metal bottle caps according to another embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the portion A in FIG. 2;

FIG. 4 is a schematic view of a polishing mechanism in an edge finishing apparatus for forming metal bottle caps according to the present invention;

FIG. 5 is an enlarged schematic view of the portion B of FIG. 4;

FIG. 6 is a schematic view of the structure of the mounting mechanism and clamping assembly of the edge finishing apparatus for forming metal bottle caps according to the present invention;

FIG. 7 is an exploded view of a clamping assembly of a molded metal bottle cap edge finishing apparatus according to the present invention;

FIG. 8 is a schematic view of a clamping mechanism in an edge trimming apparatus for forming metal bottle caps according to the present invention;

fig. 9 is a schematic view of the structure of the bottle cap with the edge to be polished according to the present invention.

In the figure: 1. a chain plate conveyor; 11. a conveying chain plate; 111. a link plate main body; 2. an electric linear module; 21. a bracket; 3. a motor; 31. a cross frame; 4. a polishing mechanism; 41. a cross plate; 411. a mounting base; 42. a moving block; 43. a polishing member; 44. a guide rod; 45. an elastic telescopic rod; 46. a rotating block; 47. a knob; 48. a locking bolt; 49. a screw rod; 5. a mounting mechanism; 51. a connecting plate; 52. a cylinder I; 6. a clamping assembly; 61. a first disc; 611. a first guide hole; 62. a second disc; 621. a second guide hole; 63. a second cylinder; 631. a spiral guide groove; 64. a third disc; 65. a cylinder III; 651. spiral guide ribs; 66. a spring; 67. a clamping mechanism; 671. a displacement block; 672. a first limiting block; 673. a guide wheel; 674. a second limiting block; 675. and (3) clamping plates.

Description of the embodiments

The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 9, the present invention provides a technical solution: the utility model provides an edge trimming device of shaping metal bottle lid, including drag conveyor 1, be equipped with on drag conveyor 1 and carry drag 11, carry drag 11 by a plurality of drag main part 111 end to end articulated link together and constitute the closed loop, one side fixed mounting of drag conveyor 1 has support 21, the top fixed mounting of support 21 has electronic sharp module 2, fixed mounting has crossbearer 31 on the slider of electronic sharp module 2, run through fixed mounting on crossbearer 31 has motor 3, motor 3's output shaft end fixed mounting has the polishing mechanism 4 that carries out the chamfer to the bottle lid edge of different diameters, drag main part 111 is in and carries drag 11 and carry out fixed clamping assembly 6 of clamping to the bottle lid of different diameters on the fixed mounting mechanism 5 on the closed loop outside.

Further, the chain plate conveyor 1 in the present application is of the prior art, so that the description is not repeated, and the bottle cap to be polished is shown in fig. 9, and the edges a and b of the bottle cap need to be chamfered and polished.

The polishing mechanism 4 comprises a transverse plate 41 fixedly connected with the end part of an output shaft of the motor 3, two mounting seats 411 are fixedly arranged at the bottom of the transverse plate 41, two movable blocks 42 are slidably arranged at the bottom of the transverse plate 41, the two movable blocks 42 are positioned between the two mounting seats 411, the two mounting seats 411 are rotatably provided with the same screw rod 49 in a penetrating mode, the screw rod 49 penetrates through the two movable blocks 42 and is in threaded connection with the two movable blocks 42, a guide rod 44 is fixedly arranged between the two mounting seats 411, the guide rod 44 penetrates through the two movable blocks 42 and is slidably connected with the two movable blocks 42, two polishing pieces 43 are fixedly arranged at the bottom of the movable blocks 42, four polishing pieces 43 at the bottom of the two movable blocks 42 are positioned on the same straight line, and the straight line where the four polishing pieces 43 are positioned is perpendicular to the axis of the output shaft of the motor 3.

The polishing members 43 are in an inverted cone shape, and an inverted V-shaped polishing area is formed between the two polishing members 43 at the bottom of the same movable block 42.

Further, through bolt penetration piece 43 and movable block 42 fixed connection, the piece 43 of polishing through changing the tapering is different then can polish the chamfer of different angles to the bottle lid edge, and the reverse V-arrangement between two pieces 43 of polishing polishes the region and can guarantee that two pieces 43 of polishing can polish the a edge and the b edge of bottle lid to the same degree.

Two sections of threads with opposite rotation directions are arranged on the screw rod 49, the two moving blocks 42 are respectively matched with the threads with the corresponding rotation directions, the two ends of the screw rod 49 are fixedly provided with the knob 47, the two locking bolts 48 penetrate through the threads on the knob 47, and the end parts of the locking bolts 48 are abutted against the mounting seats 411.

Further, one of the two rotary knobs 47 can be screwed to drive the screw rod 49 to rotate, the screw rod 49 capable of rotating drives the two movable blocks 42 to be far away from or close to each other simultaneously under the limit of the guide rod 44, so that the four polishing pieces 43 under the two movable blocks 42 can polish bottle cap edges with different diameters, when the two locking bolts 48 on the rotary knobs 47 are tightly abutted against the mounting seat 411, the rotary knobs 47 can not rotate, and therefore when other parts of the polishing mechanism 4 except the rotary blocks 46 rotate, the screw rod 49 can not rotate, and the gap between the two movable blocks 42 can not change when the bottle cap edges with teams are polished.

The installation mechanism 5 comprises a connecting plate 51 fixedly installed on a chain plate main body 111, a first cylinder 52 is fixedly installed at the top of the connecting plate 51, the clamping assembly 6 comprises a first disc 61 fixedly connected with the inner wall of the first cylinder 52, a plurality of clamping mechanisms 67 which are in rectangular distribution are installed on the first disc 61 in a penetrating and sliding manner, the moving route of the clamping mechanisms 67 coincides with the diameter line of the first disc 61, a second disc 62 is installed below the first disc 61 in a rotating manner, and the rotating second disc 62 drives the clamping mechanisms 67 to be gathered together or kept away from at the same time.

The bottom of the transverse plate 41 is fixedly provided with an elastic telescopic rod 45, the elastic telescopic rod 45 is positioned between the polishing piece 43 and the guide rod 44, the elastic telescopic rod 45 is coaxially arranged with the motor 3, and the end part of a piston rod of the elastic telescopic rod 45 is rotatably provided with a rotating block 46.

Further, through telescopic elastic telescopic link 45, guarantee after a plurality of rotating blocks 46 support and lean on the outside of bottle lid, the bottle lid no longer moves down to can guarantee that rotating block 46 can not cause too big extrusion force to the bottle lid and reduce the probability of bottle lid deformation, simultaneously rotating block 46 support and lean on the bottle lid and follow diaphragm 41 synchronous rotation not.

The second disc 62 is fixedly provided with a second cylinder 63 in a penetrating manner, the second cylinder 63 penetrates through the first disc 61 and is rotationally connected with the first disc 61, the third cylinder 65 is movably arranged in the second cylinder 63, the third disc 64 is fixedly arranged at the top end of the third cylinder 65, the inner wall of the second cylinder 63 is provided with a plurality of spiral guide grooves 631 distributed in a circumferential array manner, and the outer side of the third cylinder 65 is fixedly provided with a plurality of spiral guide ribs 651 matched with the plurality of spiral guide grooves 631.

The bottom of the cylinder III 65 is fixedly provided with a plurality of springs 66 which are distributed in a rectangular shape, and the bottom ends of the springs 66 are fixedly connected with the top of the connecting plate 51.

Further, the rotation of the third cylinder 65 can be prevented by the plurality of springs 66, and the plurality of springs 66 can restore the downward-moving third disk 64 and the third cylinder 65.

The clamping mechanism 67 comprises a displacement block 671, a second limiting block 674 and a first limiting block 672 are fixedly arranged at the top and the bottom of the displacement block 671 respectively, a clamping plate 675 is fixedly arranged at one side of the second limiting block 674, which is close to the center of the first disc 61, a guide wheel 673 is rotatably arranged at the bottom of the first limiting block 672, a plurality of first guide holes 611 distributed in a circumferential array are formed in the first disc 61, the displacement blocks 671 on the plurality of clamping mechanisms 67 are respectively and slidably arranged in the corresponding first guide holes 611, the top and the bottom of the displacement blocks 671 are respectively flush with the top and the bottom of the first disc 61, a plurality of second guide holes 621 distributed in a circumferential array are formed in the second disc 62, and the guide wheels 673 on the plurality of clamping mechanisms 67 are respectively and rotatably arranged in the corresponding second guide holes 621.

In this embodiment: in use, as shown in fig. 2, 6 and 7, the bottle cap to be polished is placed on top of the third disc 64 of the vertically upward clamping assembly 6, either manually or by a robotic arm, with the bottle cap between the plurality of clamping mechanisms 67;

as shown in fig. 4, 7, 8 and 9, when the first clamping assembly 6 with the bottle cap is moved to the position right below the motor 3, the electric linear module 2 drives the cross frame 31 and the motor 3 to move downwards, the rotating block 46 is firstly contacted with the c surface of the bottle cap, then the rotating block 46 drives the third disc 64 to move downwards, the third disc 64 moves downwards vertically under the limit of the plurality of springs 66, the third cylinder 65 which moves downwards under the cooperation of the spiral guide rib 651 and the spiral guide groove 631 drives the second cylinder 63 to rotate anticlockwise, and the second cylinder 63 drives the second disc 62 to rotate anticlockwise;

as shown in fig. 7 and 8, when the second disc 62 rotates anticlockwise, the guide wheels 673 on the plurality of clamping mechanisms 67 are driven to gather at the center of the second disc 62, the guide wheels 673 move at the center of the first disc 61 through the displacement block 671, the first limiting block 672, the second limiting block 674 and the clamping plates 675, the plurality of clamping plates 675 gathered at the center of the first disc 61 are abutted against the outer side of the bottle cap, and the plurality of clamping plates 675 are coaxially arranged with the output shafts of the first disc 61 and the motor 3;

as shown in fig. 2, 4, 5 and 9, the electric linear module 2 drives the cross frame 31 and the motor 3 to move downwards again, the elastic telescopic rod 45 on the polishing mechanism 4 shortens in the process that the motor 3 drives the cross plate 41 to move downwards, the four polishing pieces 43 move downwards to be in contact with the bottle cap, the two polishing pieces 43 at the outer side are in contact with the b edge of the end part of the bottle cap, the two polishing pieces 43 at the middle are in contact with the a edge of the end part of the bottle cap, and then the motor 3 drives other parts of the polishing mechanism 4 except the rotating block 46 to rotate, and the four polishing pieces 43 chamfer the a edge and the b edge of the bottle cap in the rotating process;

as shown in fig. 3, 7 and 8, after polishing is completed, the electric linear module 2 drives the cross frame 31 and the motor 3 to move upwards, so that the polishing mechanism 4 and the bottle cap are thoroughly separated, the plurality of springs 66 which are compressed originally reset and push the cylinder three 65 and the disk three 64 to vertically move upwards, the cylinder three 65 drives the cylinder two 63 to rotate clockwise under the cooperation of the spiral guide rib 651 and the spiral guide groove 631, the cylinder two 63 drives the disk two 62 to rotate clockwise, and when the disk two 62 rotates clockwise, the guide wheels 673 on the plurality of clamping mechanisms 67 are driven to move towards the position far from the center of the disk two 62 at the same time, the guide wheels 673 are driven to move towards the position far from the center of the disk one 61 at the same time through the displacement block 671, the first limiting block two 674 and the clamping plates 675, and the plurality of clamping plates 675 far from the center of the disk one 61 are separated from the outer side of the bottle cap;

as shown in fig. 2, by controlling the intermittent rotation of the conveying chain plate 11 from right to left, the chain plate main body 111 originally under the motor 3 rotates from right to left, and the chain plate main body 111 on the original right replaces the position of the chain plate main body 111 originally under the motor 3, when the polished bottle caps move to the rightmost side of the conveying chain plate 11, the bottle caps with the polished edges are fixed due to the fact that the bottle caps are not clamped by the clamping assembly 6, the bottle caps can fall freely under the action of self gravity, and the collecting device is added on the left side of the chain plate conveyor 1, so that the bottle caps with the polished edges can be collected in a concentrated manner;

this application protects through the mechanical structure among the to the device, and control chain-plate conveyor 1, electronic linear module 2 and motor 3's electrical system does not belong to this application protection category.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims

1. The utility model provides an edge trimming device of shaping metal bottle lid, includes drag conveyor (1), be equipped with on drag conveyor (1) and carry drag (11), carry drag (11) by a plurality of drag main part (111) end to end articulated link together and constitute closed loop, its characterized in that: one side of the chain plate type conveyor (1) is fixedly provided with a support (21), the top of the support (21) is fixedly provided with an electric linear module (2), a transverse frame (31) is fixedly arranged on a sliding block of the electric linear module (2), a motor (3) is fixedly arranged on the transverse frame (31) in a penetrating mode, the end portion of an output shaft of the motor (3) is fixedly provided with a polishing mechanism (4) for chamfering and polishing edges of bottle caps with different diameters, a chain plate main body (111) is positioned on the outer side of a closed loop of the conveying chain plate (11), a mounting mechanism (5) is fixedly arranged on the outer side of the closed loop of the conveying chain plate, and a clamping assembly (6) for clamping and fixing bottle caps with different diameters is arranged on the mounting mechanism (5);

the mounting mechanism (5) comprises a connecting plate (51) fixedly mounted on a chain plate main body (111), a first cylinder (52) is fixedly mounted at the top of the connecting plate (51), the clamping assembly (6) comprises a first disc (61) fixedly connected with the inner wall of the first cylinder (52), a plurality of clamping mechanisms (67) which are rectangular in distribution are mounted on the first disc (61) in a penetrating and sliding manner, the moving route of the clamping mechanisms (67) coincides with the diameter line of the first disc (61), a second disc (62) is mounted under the first disc (61) in a rotating manner, and the second disc (62) drives the clamping mechanisms (67) to gather together or keep away from simultaneously.

2. The edge finishing apparatus for a molded metal bottle cap of claim 1, wherein: the polishing mechanism (4) comprises a transverse plate (41) fixedly connected with the end part of an output shaft of the motor (3), two mounting seats (411) are fixedly arranged at the bottom of the transverse plate (41), two moving blocks (42) are slidably arranged at the bottom of the transverse plate (41), the two moving blocks (42) are arranged between the two mounting seats (411), the same screw rod (49) is rotatably arranged on the two mounting seats (411) in a penetrating mode, the screw rod (49) penetrates through the two moving blocks (42) and is connected with the two moving blocks (42) in a threaded mode, a guide rod (44) is fixedly arranged between the two mounting seats (411), the guide rod (44) penetrates through the two moving blocks (42) and is connected with the two moving blocks (42) in a sliding mode, two polishing pieces (43) are fixedly arranged at the bottom of the moving blocks (42), four polishing pieces (43) at the bottom of the same straight line, and the straight line where the four polishing pieces (43) are arranged is perpendicular to the axis of the output shaft of the motor (3).

3. The edge finishing apparatus for a molded metal bottle cap as claimed in claim 2, wherein: the polishing pieces (43) are in an inverted cone shape, and an inverted V-shaped polishing area is formed between the two polishing pieces (43) at the bottom of the same moving block (42).

4. The edge finishing apparatus for a molded metal bottle cap as claimed in claim 2, wherein: two sections of threads with opposite screwing directions are arranged on the screw rod (49), two moving blocks (42) are respectively matched with the threads with corresponding screwing directions, two ends of the screw rod (49) are fixedly provided with knobs (47), two locking bolts (48) penetrate through the threads on the knobs (47), and the end parts of the locking bolts (48) are abutted against the mounting seats (411).

5. The edge finishing apparatus for a molded metal bottle cap as claimed in claim 2, wherein: the bottom fixed mounting of diaphragm (41) has elastic telescopic link (45), elastic telescopic link (45) are located between grinding member (43) and guide arm (44), and elastic telescopic link (45) and motor (3) coaxial setting, piston rod tip rotation of elastic telescopic link (45) is installed rotary block (46).

6. The edge finishing apparatus for a molded metal bottle cap of claim 1, wherein: the novel spiral guide device is characterized in that a second cylinder (63) is fixedly installed on the second disc (62) in a penetrating mode, the second cylinder (63) penetrates the first disc (61) and is rotationally connected with the first disc (61), a third cylinder (65) is movably installed inside the second cylinder (63), a third disc (64) is fixedly installed at the top end of the third cylinder (65), a plurality of spiral guide grooves (631) distributed in a circumferential array mode are formed in the inner wall of the second cylinder (63), and a plurality of spiral guide ribs (651) matched with the spiral guide grooves (631) are fixedly installed on the outer side of the third cylinder (65).

7. The edge finishing apparatus for a molded metal bottle cap of claim 6, wherein: the bottom of the cylinder III (65) is fixedly provided with a plurality of springs (66) which are distributed in a rectangular shape, and the bottom ends of the springs (66) are fixedly connected with the top of the connecting plate (51).

8. The edge finishing apparatus for a molded metal bottle cap of claim 6, wherein: the clamping mechanism (67) comprises a displacement block (671), a second limiting block (674) and a first limiting block (672) are fixedly arranged at the top and the bottom of the displacement block (671) respectively, a clamping plate (675) is fixedly arranged at one side, close to the center of the first disc (61), of the second limiting block (674), a guide wheel (673) is rotatably arranged at the bottom of the first limiting block (672), a plurality of first guide holes (611) distributed in a circumferential array are formed in the first disc (61), the displacement block (671) on the plurality of clamping mechanisms (67) are slidably arranged in the corresponding first guide holes (611) respectively, the top and the bottom of the displacement block (671) are flush with the top and the bottom of the first disc (61) respectively, a plurality of second guide holes (621) distributed in a circumferential array are formed in the second disc (62), and the guide wheels (673) on the plurality of clamping mechanisms (67) are rotatably arranged in the corresponding second guide holes (621) respectively.