Multi-model quick matching and feeding system and method for plastic bucket covers

Abstract

The invention discloses a multi-model quick matching and feeding system and method for plastic bucket covers, and relates to the technical field of automation, the multi-model quick matching and feeding system comprises a bucket conveying belt, a first centering mechanism is arranged on the left side of the bucket conveying belt, and a feeding mechanism is arranged above the first centering mechanism and used for preventing the bucket covers from falling in the feeding process; the feeding mechanism comprises a driving unit which is arranged above the first centering mechanism and is used for feeding the barrel covers; the clamping unit is arranged below the driving unit and comprises a mounting frame, a rotating motor is fixedly mounted in the mounting frame, and a mounting cylinder is fixedly mounted at the bottom end of the mounting frame; the pressing unit and the rotating motor operate to drive the vortex line rotating disc to rotate, the vortex line rotating disc rotates to drive the three I-shaped sliding blocks to synchronously move inwards, the inclined faces at the bottom ends of the clamping rods are inserted into the bottom of the barrel cover, so that the barrel cover is clamped, and meanwhile, through the inclined face inserting blocks at the bottom ends of the clamping rods, the barrel cover is prevented from falling during moving.

Description

Technical Field

[0001] The invention relates to the field of automation technology, and in particular to a multi-model rapid proportioning feeding system and method for plastic barrel covers. Background Art

[0002] Plastic barrels are mainly made of plastic materials such as polyethylene (PE) and polypropylene (PP) through blow molding, injection molding and other processes. They are widely used in chemical, pesticide, pharmaceutical, food, hardware and electronics, electromechanical and other industries for outer packaging, storage and transportation of liquids and solid items.

[0003] According to the patent name: A fully automatic multi-model feeding machine for plastic barrel covers (patent publication number: CN107814195A, patent publication date: 2018-03-20), it includes a control system, a plastic barrel conveying platform for conveying plastic barrels, and a sensing device is arranged on the plastic barrel conveying platform; it also includes an adjusting grasping device coordinated with the sensing device, and a barrel cover material rack for placing the barrel cover is arranged on the adjusting grasping device, and the barrel cover is sucked by a suction cup, which can be applied to different types of barrel covers and has wide adaptability and flexibility; the position of the plastic barrel and the barrel cover is transmitted in real time by the sensing device and the sensing mechanism, so that the work is real-time and reliable; the sensing of the two positions greatly reduces the position error rate, improves work efficiency, and reduces manpower loss.

[0004] Based on the above-mentioned prior art, the existing multi-model rapid proportioning feeding system and method for plastic barrel covers still have the following problems: the models of plastic barrel covers on the market are mostly different, and the existing multi-model rapid proportioning feeding system for plastic barrel covers mostly feeds the plastic barrel covers through suction cups or clamps, but during the feeding process, the barrel covers may fall off due to the material of the barrel covers. Therefore, the present invention provides a multi-model rapid proportioning feeding system and method for plastic barrel covers. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a multi-model rapid proportioning feeding system and method for plastic barrel covers, which solves the problem that most plastic barrel covers on the market currently have different models. However, most of the existing multi-model rapid proportioning feeding systems for plastic barrel covers feed the plastic barrel covers through suction cups or clamps, but the barrel covers may fall off during the feeding process due to the material of the barrel covers.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multi-model rapid proportioning feeding system for plastic barrel covers, comprising a barrel conveyor belt, a feeding conveyor belt is arranged on the right side of the barrel conveyor belt, a first feeding conveyor belt, a second feeding conveyor belt and a third feeding conveyor belt are arranged on one side of the feeding conveyor belt, a first centering mechanism is arranged on the left side of the barrel conveyor belt, a second centering unit is arranged on the right side of the barrel conveyor belt, a feeding mechanism is arranged above the first centering mechanism to prevent the barrel cover from falling during the feeding process, and the feeding mechanism includes:

[0007] A driving unit is disposed above the first centering mechanism and is used to load the barrel cover;

[0008] The clamping unit is arranged below the driving unit, and comprises a mounting frame, wherein a rotating motor is fixedly mounted inside the mounting frame, a mounting cylinder is fixedly mounted at the bottom end of the mounting frame, a vortex pattern turntable is rotatably mounted inside the mounting cylinder, and the output end of the rotating motor passes through the mounting frame, and the mounting cylinder is fixedly connected with the vortex pattern turntable, three I-shaped grooves are opened inside the mounting cylinder, and an I-shaped slider is slidably mounted inside the I-shaped groove, and a clamping rod is fixedly mounted on one end of the I-shaped slider, and the I-shaped slider is meshed and mounted with the vortex pattern turntable;

[0009] The pressing unit is arranged below the clamping unit and is used to tightly connect the barrel cover and the barrel.

[0010] Preferably, the driving unit includes a support rod, a mounting frame is fixedly installed on the top of the support rod, a cross slide groove is opened inside the mounting frame, a cross slide block is slidably installed inside the cross slide groove, a loading cylinder is fixedly installed on the top of the cross slide block, and the output rod of the loading cylinder passes through the cross slide block and is fixedly connected to the mounting frame.

[0011] Preferably, a screw rod is rotatably installed inside the cross slide, a feeding motor is fixedly installed on the left end of the mounting frame, and the screw rod passes through the mounting frame and is fixedly connected to the feeding motor.

[0012] Preferably, the clamping unit comprises a fixing cylinder fixedly mounted at the bottom of the mounting cylinder, a limiting slide groove is provided inside the fixing cylinder, a limiting slider is slidably mounted inside the limiting slide groove, and a spring is installed inside the limiting slide groove.

[0013] Preferably, a pressure rod is fixedly installed at the bottom of the limit sliding block, a pressure plate is fixedly installed at the bottom end of the pressure rod, and a rubber pad is fixedly installed at the bottom end of the pressure rod.

[0014] Preferably, the first centering mechanism includes a support frame fixedly installed on the left side of the barrel conveyor belt, a fixed plate is fixedly installed on the top of the support frame, and a support rod is fixedly installed on the top of the fixed plate, a positioning cylinder is fixedly installed on the top of the fixed plate, a positioning block is fixedly installed on the output end of the positioning cylinder, and a V-shaped groove is opened on one side of the positioning block.

[0015] Preferably, a limit rod is fixedly installed on one side of the positioning block close to the clamping unit, an image sensor is fixedly installed on the top of the limit rod, a limit seat is fixedly installed on the top of the fixed plate, and one end of the limit rod is adapted to slide on the limit column of the limit seat.

[0016] The invention also discloses an operating method of a multi-model rapid proportioning feeding system for plastic barrel covers, comprising the following steps:

[0017] S1: First, different types of barrel covers are placed on the first feeding conveyor, the second feeding conveyor and the third feeding conveyor respectively, and then the barrel conveyor runs to convey the plastic barrel. When the plastic barrel enters between the first centering mechanism and the second centering unit, the barrel conveyor stops running, and the positioning cylinder runs at this time to push the positioning block to move. At the same time, the second centering unit runs synchronously to center the plastic barrel. At the same time, the plastic barrel is scanned by the image sensor to determine the model. When the model is obtained, the barrel covers on the first feeding conveyor, the second feeding conveyor and the third feeding conveyor are matched, and the barrel covers are moved to the feeding conveyor;

[0018] S2: Then, the feeding motor runs, the feeding motor drives the screw rod to rotate, drives the clamping unit to move, drives the clamping unit to move to the top of the barrel cover on the feeding conveyor, and the feeding cylinder drives the clamping unit to move downward. The rotating motor runs, drives the vortex pattern turntable to rotate, and the rotation of the vortex pattern turntable drives the three I-shaped sliders to move synchronously in the middle. The inclined surface at the bottom end of the clamping rod is inserted into the bottom of the barrel cover to clamp the barrel cover. At the same time, when the clamping unit clamps the barrel cover, the barrel cover squeezes the rubber pad, the pressure plate and the pressure rod. At this time, the pressure rod drives the limit slider to squeeze the spring, and the feeding cylinder drives the clamping unit to move upward. Then the feeding motor runs again, and drives the clamping unit to move to the top of the barrel cover on the barrel feeding conveyor through the screw rod. The feeding cylinder drives the clamping unit to move downward and place the barrel cover on the barrel. At the same time, the clamping unit squeezes the barrel cover to make the barrel cover and the barrel tightly connected.

[0019] The present invention provides a multi-model rapid proportioning feeding system and method for plastic barrel covers. Compared with the prior art, it has the following beneficial effects:

[0020] 1. The multi-model rapid proportioning feeding system and method of the plastic barrel cover, the rotating motor runs, driving the vortex pattern turntable to rotate, the rotation of the vortex pattern turntable drives the three I-shaped sliders to move synchronously in the middle, the inclined surface at the bottom end of the clamping rod is inserted into the bottom of the barrel cover, thereby clamping the barrel cover, and at the same time, the inclined surface of the bottom end of the clamping rod is inserted into the block, thereby preventing the barrel cover from falling off when moving.

[0021] 2. The multi-model rapid proportioning feeding system and method of the plastic barrel cover, when the clamping unit clamps the barrel cover, the barrel cover squeezes the rubber pad, the pressure plate and the pressure rod, at this time the pressure rod drives the limit slider to squeeze the spring, when the clamping unit drives the barrel cover to be placed on the top of the barrel, the clamping unit releases the clamping of the barrel cover, at this time the spring pushes the limit slider to move through its own elastic force, the limit slider drives the pressure rod, the pressure plate and the rubber pad to move synchronously, the rubber pad pushes the barrel cover, so that the barrel cover fits tightly with the barrel, avoiding the barrel cover from falling off during the movement of the barrel.

[0022] 3. The multi-model rapid proportioning feeding system and method of the plastic barrel cover operates the positioning cylinder to push the positioning block to move, and the second centering unit operates synchronously to center the plastic barrel, which can ensure that the plastic barrel is always in the predetermined position during the feeding process, reducing the feeding error caused by position offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a left-side stereoscopic structural diagram of the present invention;

[0024] Figure 2 It is a partial right-side stereoscopic structural diagram of the present invention;

[0025] Figure 3 It is a structural diagram of the three-dimensional first centering mechanism of the present invention;

[0026] Figure 4 It is a structural diagram of the three-dimensional feeding mechanism of the present invention;

[0027] Figure 5 It is a cross-sectional structural diagram of the three-dimensional clamping unit of the present invention;

[0028] Figure 6 It is a cross-sectional structural diagram of the three-dimensional pressing unit of the present invention.

[0029] In the figure: 1-barrel conveyor belt, 2-first centering mechanism, 21-support frame, 22-fixed plate, 23-positioning cylinder, 24-positioning block, 25-limit rod, 26-limit seat, 27-image sensor, 3-feeding mechanism, 31-driving unit, 311-support rod, 312-mounting frame, 313-cross slide, 314-cross slide, 315-feeding cylinder, 316-screw rod, 317-feeding motor, 32-clamping unit, 321-mounting frame, 322-rotating motor, 323-mounting cylinder, 324-I-shaped groove, 325-I-shaped slider, 326-clamping rod, 327-vortex pattern turntable, 33-pressing unit, 331-fixing cylinder, 332-limiting slide groove, 333-limiting slider, 334-spring, 335-pressure rod, 336-pressure plate, 337-rubber pad, 4-second centering unit, 5-feeding conveyor belt, 6-first loading conveyor belt, 7-second loading conveyor belt, 8-third loading conveyor belt. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-6 , the present invention provides a technical solution:

[0032] A multi-model rapid proportioning feeding system for plastic barrel covers comprises a barrel conveyor belt 1, a feeding conveyor belt 5 is arranged on the right side of the barrel conveyor belt 1, a first feeding conveyor belt 6, a second feeding conveyor belt 7 and a third feeding conveyor belt 8 are arranged on one side of the feeding conveyor belt 5, a first centering mechanism 2 is arranged on the left side of the barrel conveyor belt 1, a second centering unit 4 is arranged on the right side of the barrel conveyor belt 1, a feeding mechanism 3 is arranged above the first centering mechanism 2 to prevent the barrel cover from falling during the feeding process, and the feeding mechanism 3 comprises:

[0033] The driving unit 31 is arranged above the first centering mechanism 2 and is used to load the barrel cover;

[0034] The clamping unit 32 is arranged below the driving unit 31, and includes a mounting frame 321, a rotating motor 322 is fixedly installed inside the mounting frame 321, a mounting cylinder 323 is fixedly installed at the bottom end of the mounting frame 321, a vortex pattern turntable 327 is rotatably installed inside the mounting cylinder 323, and the output end of the rotating motor 322 passes through the mounting frame 321, and the mounting cylinder 323 is fixedly connected with the vortex pattern turntable 327, three I-shaped grooves 324 are opened inside the mounting cylinder 323, and an I-shaped slider 325 is slidably installed inside the I-shaped groove 324, and a clamping rod 326 is fixedly installed at one end of the I-shaped slider 325, and the I-shaped slider 325 is meshed and installed with the vortex pattern turntable 327;

[0035] The pressing unit 33 is disposed below the clamping unit 32 and is used to tightly connect the barrel cover to the barrel.

[0036] The rotating motor 322 runs, driving the vortex pattern turntable 327 to rotate. The rotation of the vortex pattern turntable 327 drives the three I-shaped sliders 325 to move synchronously toward the center. The inclined surface at the bottom end of the clamping rod 326 is inserted into the bottom of the barrel cover to clamp the barrel cover. At the same time, the inclined surface of the bottom end of the clamping rod 326 is inserted into the block to prevent the barrel cover from falling off during movement.

[0037] The second centering unit 4 has the same structure as the first centering mechanism 2 .

[0038] In this embodiment, the driving unit 31 includes a support rod 311, a mounting frame 312 is fixedly installed on the top of the support rod 311, a cross slide groove 313 is opened inside the mounting frame 312, a cross slider 314 is slidably installed inside the cross slide groove 313, a loading cylinder 315 is fixedly installed on the top of the cross slider 314, the output rod of the loading cylinder 315 passes through the cross slider 314 and is fixedly connected to the mounting frame 321, a screw rod 316 is rotatably installed inside the cross slide groove 313, a loading motor 317 is fixedly installed on the left end of the mounting frame 312, and the screw rod 316 passes through the mounting frame 312 and is fixedly connected to the loading motor 317.

[0039] The feeding motor 317 runs, and the feeding motor 317 drives the screw rod 316 to rotate, and drives the clamping unit 32 to move left and right. The feeding cylinder 315 runs and drives the clamping unit 32 to move up and down.

[0040] In this embodiment, the clamping unit 33 includes a fixed cylinder 331 fixedly installed at the bottom of the mounting cylinder 323, a limiting groove 332 is provided inside the fixed cylinder 331, a limiting slider 333 is slidably installed inside the limiting groove 332, a spring 334 is installed inside the limiting groove 332, a pressure rod 335 is fixedly installed at the bottom of the limiting slider 333, a pressure plate 336 is fixedly installed at the bottom end of the pressure rod 335, and a rubber pad 337 is fixedly installed at the bottom end of the pressure rod 335.

[0041] When the clamping unit 32 clamps the barrel cover, the barrel cover squeezes the rubber pad 337, the pressure plate 336 and the pressure rod 335. At this time, the pressure rod 335 drives the limiting slider 333 to squeeze the spring 334. When the clamping unit 32 drives the barrel cover to be placed on the top of the barrel, the clamping unit 32 releases the clamping of the barrel cover. At this time, the spring 334 pushes the limiting slider 333 to move through its own elastic force. The limiting slider 333 drives the pressure rod 335, the pressure plate 336 and the rubber pad 337 to move synchronously. The rubber pad 337 pushes the barrel cover, so that the barrel cover fits tightly with the barrel to prevent the barrel cover from falling off during the movement of the barrel.

[0042] In this embodiment, the first centering mechanism 2 includes a support frame 21 fixedly installed on the left side of the barrel conveyor belt 1, a fixed plate 22 is fixedly installed on the top of the support frame 21, and a support rod 311 is fixedly installed on the top of the fixed plate 22, a positioning cylinder 23 is fixedly installed on the top of the fixed plate 22, a positioning block 24 is fixedly installed on the output end of the positioning cylinder 23, a V-shaped groove is provided on one side of the positioning block 24, a limiting rod 25 is fixedly installed on the side of the positioning block 24 close to the clamping unit 32, an image sensor 27 is fixedly installed on the top of the limiting rod 25, a limiting seat 26 is fixedly installed on the top of the fixed plate 22, and one end of the limiting rod 25 is adapted to slide on the limiting column of the limiting seat 26.

[0043] The positioning cylinder 23 operates to push the positioning block 24 to move, and the second centering unit 4 operates synchronously to center the plastic barrel, thereby ensuring that the plastic barrel is always in a predetermined position during the loading process, thereby reducing the loading error caused by position offset.

[0044] The model of the image sensor 27 is Z2R-400N. The plastic barrel is centered and scanned by the image sensor 27 to determine the model. When the model is obtained, the barrel covers on the first feeding conveyor belt 6, the second feeding conveyor belt 7 and the third feeding conveyor belt 8 are matched and the barrel covers are moved to the feeding conveyor belt 5.

[0045] An operating method of a multi-model rapid proportioning feeding system for plastic barrel covers, characterized in that it comprises the following steps:

[0046] S1: First, different types of barrel covers are placed on the first feeding conveyor belt 6, the second feeding conveyor belt 7 and the third feeding conveyor belt 8 respectively, and then the barrel conveyor belt 1 is operated to convey the plastic barrel. When the plastic barrel enters between the first centering mechanism 2 and the second centering unit 4, the barrel conveyor belt 1 stops running, and the positioning cylinder 23 is operated at this time to push the positioning block 24 to move. At the same time, the second centering unit 4 is synchronously operated to center the plastic barrel. At the same time, the plastic barrel is scanned and determined by the image sensor 27. When the model is obtained, the barrel covers on the first feeding conveyor belt 6, the second feeding conveyor belt 7 and the third feeding conveyor belt 8 are matched, and the barrel covers are moved to the feeding conveyor belt 5;

[0047] S2: Then, the feeding motor 317 is running, the feeding motor 317 drives the screw rod 316 to rotate, drives the clamping unit 32 to move, drives the clamping unit 32 to move to the top of the barrel cover on the feeding conveyor belt 5, the feeding cylinder 315 drives the clamping unit 32 to move downward, the rotating motor 322 is running, drives the vortex pattern turntable 327 to rotate, and the rotation of the vortex pattern turntable 327 drives the three I-shaped sliders 325 to move synchronously in the middle, and the inclined surface at the bottom end of the clamping rod 326 is inserted into the bottom of the barrel cover to clamp the barrel cover. At the same time, the clamping unit 32 is clamped to the barrel. When the cover is clamped, the barrel cover squeezes the rubber pad 337, the pressure plate 336 and the pressure rod 335. At this time, the pressure rod 335 drives the limit slider 333 to squeeze the spring 334, and the feeding cylinder 315 drives the clamping unit 32 to move upward. Then the feeding motor 317 runs again, and drives the clamping unit 32 to move to the top of the barrel cover on the barrel conveyor belt 1 through the screw rod 316. The feeding cylinder 315 runs and drives the clamping unit 32 to move downward, placing the barrel cover on the barrel. At the same time, the clamping unit 33 squeezes the barrel cover to make the barrel cover and the barrel tightly connected.

[0048] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-model rapid proportioning feeding system for plastic barrel covers, characterized by: The invention comprises a barrel conveyor belt (1), a feeding conveyor belt (5) is arranged on the right side of the barrel conveyor belt (1), a first loading conveyor belt (6), a second loading conveyor belt (7) and a third loading conveyor belt (8) are arranged on one side of the feeding conveyor belt (5), a first centering mechanism (2) is arranged on the left side of the barrel conveyor belt (1), a second centering unit (4) is arranged on the right side of the barrel conveyor belt (1), a loading mechanism (3) is arranged above the first centering mechanism (2) for preventing the barrel cover from falling off during the loading process, and the loading mechanism (3) comprises: A driving unit (31) is arranged above the first centering mechanism (2) and is used to load the barrel cover; The clamping unit (32) is arranged below the driving unit (31), and comprises a mounting frame (321), a rotating motor (322) is fixedly mounted inside the mounting frame (321), a mounting cylinder (323) is fixedly mounted at the bottom end of the mounting frame (321), a vortex pattern turntable (327) is rotatably mounted inside the mounting cylinder (323), and the output end of the rotating motor (322) passes through the mounting frame (321), and the mounting cylinder (323) is fixedly connected to the vortex pattern turntable (327), three I-shaped grooves (324) are provided inside the mounting cylinder (323), and an I-shaped slider (325) is slidably mounted inside the I-shaped groove (324), a clamping rod (326) is fixedly mounted on one end of the I-shaped slider (325), and the I-shaped slider (325) is meshedly mounted with the vortex pattern turntable (327); The pressing unit (33) is arranged below the clamping unit (32) and is used to tightly connect the barrel cover to the barrel.

2. According to claim 1, a multi-model rapid proportioning feeding system for plastic barrel covers is characterized by: The driving unit (31) comprises a support rod (311), a mounting frame (312) is fixedly mounted on the top of the support rod (311), a cross slide groove (313) is provided inside the mounting frame (312), a cross slide block (314) is slidably mounted inside the cross slide groove (313), a loading cylinder (315) is fixedly mounted on the top of the cross slide block (314), and an output rod of the loading cylinder (315) passes through the cross slide block (314) and is fixedly connected to the mounting frame (321).

3. According to claim 2, a multi-model rapid proportioning feeding system for plastic barrel covers is characterized by: A screw rod (316) is rotatably mounted inside the cross slide (313), a feeding motor (317) is fixedly mounted on the left end of the mounting frame (312), and the screw rod (316) penetrates the mounting frame (312) and is fixedly connected to the feeding motor (317).

4. The multi-model rapid proportioning feeding system for plastic barrel covers according to claim 1 is characterized in that: The clamping unit (33) comprises a fixing cylinder (331) fixedly mounted at the bottom of the mounting cylinder (323); a limiting slide groove (332) is provided inside the fixing cylinder (331); a limiting slider (333) is slidably mounted inside the limiting slide groove (332); and a spring (334) is mounted inside the limiting slide groove (332).

5. According to claim 4, a multi-model rapid proportioning feeding system for plastic barrel covers is characterized in that: A pressure rod (335) is fixedly mounted on the bottom of the limiting sliding block (333), a pressure plate (336) is fixedly mounted on the bottom end of the pressure rod (335), and a rubber pad (337) is fixedly mounted on the bottom end of the pressure rod (335).

6. The multi-model rapid proportioning feeding system for plastic barrel covers according to claim 2 is characterized in that: The first centering mechanism (2) comprises a support frame (21) fixedly mounted on the left side of the barrel conveyor belt (1); a fixed plate (22) is fixedly mounted on the top of the support frame (21); a support rod (311) is fixedly mounted on the top of the fixed plate (22); a positioning cylinder (23) is fixedly mounted on the top of the fixed plate (22); a positioning block (24) is fixedly mounted on the output end of the positioning cylinder (23); and a V-shaped groove is provided on one side of the positioning block (24).

7. A multi-model rapid proportioning feeding system for plastic barrel covers according to claim 6, characterized in that: A limiting rod (25) is fixedly mounted on one side of the positioning block (24) close to the clamping unit (32); an image sensor (27) is fixedly mounted on the top of the limiting rod (25); a limiting seat (26) is fixedly mounted on the top of the fixing plate (22); and one end of the limiting rod (25) is adapted to slide on a limiting column of the limiting seat (26).

8. The method for operating a multi-model rapid proportioning feeding system for plastic drum covers according to claims 1-7 is characterized in that: The following steps are involved: S1: First, different types of barrel covers are placed on the first feeding conveyor belt (6), the second feeding conveyor belt (7) and the third feeding conveyor belt (8) respectively, and then the barrel conveyor belt (1) is operated to convey the plastic barrel. When the plastic barrel enters between the first centering mechanism (2) and the second centering unit (4), the barrel conveyor belt (1) stops running. At this time, the first centering mechanism (2) runs synchronously with the second centering unit (4) to center the plastic barrel. At the same time, the sensor on the first centering mechanism (2) scans the plastic barrel to determine the model. When the model is obtained, the barrel covers on the first feeding conveyor belt (6), the second feeding conveyor belt (7) and the third feeding conveyor belt (8) are matched and the barrel covers are moved to the feeding conveyor belt (5); S2: Then, the driving unit (31) operates, driving the clamping unit (32) to move, the clamping unit (32) clamps the barrel cover on the feeding conveyor belt (5), and the pressing unit (33) squeezes the barrel cover. After that, the driving unit (31) operates again, moves the barrel cover to the top of the barrel, places the barrel cover on the barrel, and squeezes the barrel cover to make the barrel cover and the barrel tightly connected.

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