A system and method for adjusting the circumferential consistency of a rubber cap

Abstract

The present invention relates to a system and method for producing rubber caps, and in particular to a system and method for adjusting the circumferential consistency of rubber caps. In order to solve the problem in the prior art that the orientation of the rubber caps is random after being output and collected by a chip composite device, and the machine operator needs to rotate them to a corresponding angle to put them on bottle caps, which increases labor intensity and reduces production efficiency, the system for adjusting the circumferential consistency of the rubber caps comprises an adjustment unit, a collection unit, and a control unit. The adjustment unit comprises two rubber cap adjustment components, a first detection photoelectric unit, a second detection photoelectric unit, and a second drive mechanism. The rubber cap adjustment component comprises a rubber cap receiving nozzle, a color code sensor provided corresponding to the rubber cap adsorbed by the rubber cap receiving nozzle, and a first drive mechanism for driving the rubber cap receiving nozzle to rotate around its central axis. The two rubber cap adjustment components can simultaneously receive and output the rubber caps, and adjust the circumferential positions of the rubber caps to be consistent while exchanging positions.

Description

Technical Field

[0001] The present invention relates to a system and method for producing a rubber cap, and in particular to a system and method for adjusting the circumferential consistency of a rubber cap. Background Art

[0002] The integrated laminating machine for cap production primarily consists of three parts: a cap laminating machine, an online inspection system, and a chip laminating machine. The cap laminating machine integrates various raw materials and produces finished caps. The online inspection system visually inspects the appearance quality of finished caps, rejecting those with appearance quality issues and sorting them into separate bins to ensure that inspected caps meet process quality requirements. The chip laminating machine applies glue to the back of the label and then embeds the coated label into the bottom of the cap via the bottle cap rotating mechanism, achieving the integrated laminating of the cap and label. A card reader then reads the chip information on the label, rejecting any unqualified caps and sending the remaining finished caps to a collection device.

[0003] After being output and collected by the chip composite equipment, the direction of the rubber caps is random. When putting the rubber caps on the wine bottles, the machine operator must observe the direction of each rubber cap label, rotate the label to the same direction as the ribbon on the wine bottle, and then put it into the bottle cap. This seemingly simple action actually increases the labor intensity of the production line workers and reduces production efficiency. Summary of the Invention

[0004] The present invention aims to solve the problem in the prior art that after being output and collected by chip compounding equipment, the orientation of the plastic caps is random, and the machine operator needs to rotate them to the corresponding angle to put them on the bottle caps, which increases labor intensity and reduces production efficiency. The present invention provides a system and method for adjusting the circumferential consistency of the plastic caps.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A system for adjusting the circumferential consistency of a rubber cap, which is special in that: it includes an adjustment unit, a collection unit and a control unit; the adjustment unit includes two rubber cap adjustment components, a first detection photoelectric device and a second detection photoelectric device, and a second drive mechanism for driving the two rubber cap adjustment components to exchange positions by rotation; the positions of the two rubber cap adjustment components are defined as a receiving position and an output position respectively; the rubber cap adjustment component includes a rubber cap receiving suction head, a color mark sensor corresponding to the rubber cap adsorbed by the rubber cap receiving suction head, and a first drive mechanism for driving the rubber cap receiving suction head to rotate around its central axis; the first detection photoelectric device and the second detection photoelectric device are respectively set at the receiving position and the output position, and correspond to the rubber cap receiving suction head at the position, for detecting whether there is a rubber cap adsorbed on the rubber cap receiving suction head, and feeding back the detection signal to the control unit, and the control unit controls the working state of the second drive mechanism according to the detection signal; The glue cap receiving suction head is connected to a negative pressure or positive pressure air source. The glue cap receiving suction head is connected to a negative pressure adsorption external device to adsorb glue caps delivered at the receiving position, and is connected to a positive pressure air source at the output position to blow out the glue caps; the color mark sensor is used to detect and identify the color of a specific mark on the glue cap, and feed back the identification signal of the color mark sensor to the control unit, and the control unit controls the working state of the first driving mechanism according to the identification signal; the collection unit includes a vacuum receiving tube, the inlet of which corresponds to the glue cap receiving suction head at the output position; the inlet end of the vacuum receiving tube is connected to a positive pressure air source for blowing out the collected glue caps, and a cover plate is provided at the outlet, and a negative pressure hole is provided between the inlet and outlet of the vacuum receiving tube for connecting negative pressure to provide power for the glue cap to move axially in the vacuum receiving tube; the inner wall between the negative pressure hole and the inlet of the vacuum receiving tube is axially provided with at least one ridge for squeezing the outer wall of the glue cap to prevent the glue cap from rotating circumferentially.

[0007] Furthermore, the distance from the negative pressure hole to the inlet of the vacuum material receiving pipe is 180-250 mm.

[0008] Furthermore, there are multiple negative pressure holes, which are evenly opened along the circumference of the vacuum receiving tube. A negative pressure cavity is set on the periphery of the negative pressure hole. The vacuum receiving tube is connected to the vacuum generator through the negative pressure holes and the negative pressure cavity.

[0009] Furthermore, a positive pressure cavity is circumferentially arranged near the inlet of the vacuum receiving pipe, and the positive pressure cavity is connected to the vacuum receiving pipe through air inlet holes uniformly arranged along the circumference of the vacuum receiving pipe, and is also connected to a positive pressure air source;

[0010] The air inlet hole is arranged toward the outlet of the vacuum receiving tube, and its diameter gradually decreases along the air inlet direction to form a tapered hole, the central axis of which is at an angle of 30-50° to the central axis of the vacuum receiving tube.

[0011] Furthermore, the rubber cap receiving nozzle is truncated cone-shaped and has the same taper as the rubber cap, so that the rubber cap is sleeved on the rubber cap receiving nozzle and fits with the rubber cap receiving nozzle. The upper bottom surface of the truncated cone faces outward and is provided with a through hole, which is connected to the vacuum pump and the positive pressure gas source.

[0012] Furthermore, the first driving mechanism is a stepping motor, the second driving mechanism is a swing cylinder, and the control unit is a PLC system;

[0013] The collecting unit further comprises an adjusting fixing frame, and the vacuum collecting tube is fixed by the adjusting fixing frame;

[0014] The convex ridges are arc-shaped ridges, and there are three of them. The three arc-shaped ridges are evenly distributed along the circumference of the inner wall of the vacuum receiving tube and are staggered with the negative pressure holes. The diameter a of the circle formed by the highest points of the three arc-shaped ridges and the outer diameter R of the rubber cap satisfy the following formula: 1mm≤Ra≤3mm;

[0015] The angle between the air inlet and the central axis of the vacuum receiving tube is 45°;

[0016] The distance from the negative pressure hole to the inlet of the vacuum material receiving pipe is 200 mm.

[0017] Furthermore, it also includes a pneumatic slip ring and a rotating platform connected to the output end of the swing cylinder;

[0018] The two rubber cap adjustment components are respectively located at two ends of the rotating platform;

[0019] The pneumatic slip ring is located at the center of the rotating platform, the rubber cap receiving suction head is connected to the negative pressure or positive pressure air source through the pneumatic slip ring, and the control unit is connected to the color mark sensor and the stepper motor through the pneumatic slip ring.

[0020] At the same time, a method for adjusting the circumferential consistency of a rubber cap is also provided. Based on the above-mentioned system for adjusting the circumferential consistency of a rubber cap, the method is special in that it includes the following steps:

[0021] S1, receiving and output rubber cap

[0022] Receiving position: The cap receiving suction head receives and adsorbs the caps delivered by the external device. The first detection photoelectric device detects that the caps have been received by the cap receiving suction head and transmits the receiving detection signal to the control unit.

[0023] Output position: The control unit switches the negative pressure of the cap receiving nozzle to positive pressure, blowing the corresponding cap out and collecting it in the vacuum receiving tube. The second detection photoelectric sensor detects that the cap has been sent out and transmits the output detection signal to the control unit, which counts once.

[0024] S2, circumferential position adjustment and position exchange of rubber cap

[0025] After receiving the signal from the first detection photoelectric sensor, the control unit controls the plastic cap receiving head at the receiving position to rotate around its central axis to adjust the circumferential position of the plastic cap to be consistent. After receiving the signal from the first detection photoelectric sensor (61) and the signal from the second detection photoelectric sensor (62), the control unit controls the second driving mechanism to operate so that the plastic cap receiving heads at the receiving position and the output position exchange positions, and at the same time switches the positive pressure of the plastic cap receiving head at the output position to a negative pressure.

[0026] S3, the control unit determines whether the count reaches the set number, if so, the adjustment of the circumferential consistency of the rubber cap is completed, otherwise, return to step S1.

[0027] Furthermore, after step S3, the following steps are further included:

[0028] S4, when the count reaches the set number, the air inlet of the vacuum receiving tube is connected to the positive pressure gas source, so that the positive pressure gas pushes the rubber cap to move to the outlet of the vacuum receiving tube, opens the cover plate and sends the rubber cap out for subsequent processes.

[0029] Furthermore, in step S1, the vacuum collecting tube collects the material specifically as follows:

[0030] The negative pressure hole of the vacuum receiving tube is connected to the negative pressure, so that the rubber caps entering the vacuum receiving tube move to the side of the negative pressure hole close to the outlet; the rubber caps entering later push the rubber caps entering earlier to move toward the outlet as a whole, realizing the collection of multiple rubber caps;

[0031] In step S2, the circumferential position adjustment of the rubber cap is specifically as follows: the control unit controls the color mark sensor at the receiving position to detect the corresponding rubber cap and determine whether the color of the specific mark is detected. If the color of the specific mark is not detected, the control unit controls the stepper motor to rotate, driving the rubber cap receiving nozzle and the rubber cap to rotate around the central axis thereof until the color mark sensor recognizes the color of the specific mark on the rubber cap. The control unit then controls the stepper motor to stop rotating, so that the circumferential position of the rubber cap is consistent. If so, the circumferential position of the rubber cap is consistent, and the process proceeds to step 3).

[0032] The position exchange is specifically as follows: the control unit controls the swing cylinder to rotate forward or reverse, and exchanges the positions of the rubber cap receiving suction head at the receiving position and the output position.

[0033] Beneficial effects of the present invention:

[0034] 1. The present invention realizes the adjustment of the circumferential consistency of the rubber caps by setting an adjustment unit, and cooperates with the vacuum receiving tube to collect the adjusted rubber caps, so as to always keep the circumferential consistency of the rubber caps. When the operator puts on the rubber caps, the rubber caps can be directly installed in the corresponding position, avoiding manual positioning and reducing work efficiency.

[0035] 2. The vacuum receiving tube of the present invention is provided with ridges for squeezing the rubber cap, thereby increasing the contact area between the rubber cap and the vacuum feeding tube, thereby increasing the friction force, and at the same time making the rubber cap and the vacuum receiving tube have a concave-convex fit, thereby avoiding circumferential rotation in the vacuum receiving tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 2 is a schematic structural diagram of a system for adjusting the circumferential consistency of a rubber cap according to an embodiment of the present invention;

[0037] Figure 2 Schematic diagram of the external structure of the vacuum material receiving tube in an embodiment of the present invention;

[0038] Figure 3 is a radial cross-sectional view of the negative pressure area of ​​the vacuum receiving pipe in an embodiment of the present invention;

[0039] Figure 4 is a cross-sectional view of the vacuum material receiving tube along the axial direction in an embodiment of the present invention;

[0040] Figure 5 2 is a schematic structural diagram of the air inlet of the vacuum receiving pipe according to an embodiment of the present invention;

[0041] Description of reference numerals:

[0042] 1-rubber cap receiving suction head, 2-color mark sensor, 3-stepping motor, 4-pneumatic slip ring, 5-swinging cylinder, 61-first detection photoelectric, 62-second detection photoelectric, 7-vacuum receiving tube, 71-negative pressure area, 72-balance area, 73-arc-shaped edge, 8-adjusting fixing frame, 9-negative pressure cavity, 91-negative pressure hole, 10-positive pressure cavity, 101-air inlet, 11-cover plate, 12-rotating platform. DETAILED DESCRIPTION

[0043] A system for adjusting the circumferential consistency of a rubber cap according to the present invention, such as Figures 1 to 2 As shown, it includes a regulating unit, a collecting unit and a control unit. In this embodiment, the control unit is a PLC system.

[0044] The adjustment unit, located between the chip lamination device and the collection unit, receives the rubber caps from the chip lamination device, adjusts their orientation, and delivers them to the collection unit. The adjustment unit includes a rubber cap receiving nozzle 1, a color mark sensor 2, a stepper motor 3, a pneumatic slip ring 4, an oscillating cylinder 5, a first detection photoelectric sensor 61, and a second detection photoelectric sensor 62. The output end of the oscillating cylinder 5 is connected to a rotating platform 12, with the pneumatic slip ring 4 positioned at its center.

[0045] The corresponding positions at both ends of the rotating platform 12 are defined as the receiving position and the output position, respectively. Two rubber cap receiving nozzles 1 are respectively provided at the receiving position and the output position of the rotating platform 12. The rubber cap receiving nozzle 1 at the receiving position corresponds to the discharge port of the chip composite device, and the rubber cap receiving nozzle 1 at the output position corresponds to the collection unit. The rubber cap receiving nozzle 1 is truncated cone-shaped and has the same taper as the rubber cap. Different tapers of the rubber cap receiving nozzles 1 can be customized according to the shape of the rubber cap, so that the rubber cap is sleeved on the rubber cap receiving nozzle 1, and the rubber cap and the rubber cap receiving nozzle 1 fit tightly to ensure that the rubber cap does not deform. The upper bottom surface of the truncated cone faces outward and is provided with a through hole. The through hole is connected to the vacuum pump and the positive pressure gas source through the gas-electric slip ring 4 and the connecting pipeline. The connecting pipeline is provided with a first solenoid valve for switching between positive and negative pressures. The first solenoid valve is switched to connect to the vacuum pump to provide negative pressure, and the rubber cap is adsorbed to the rubber cap receiving nozzle 1. The positive pressure airflow is provided to blow the rubber cap out by switching to connect to the positive pressure gas source.

[0046] The color mark sensor 2 is fixedly connected to the rubber cap receiving suction head 1 through the workpiece, is arranged above the rubber cap receiving suction head 1, and is facing the rubber cap adsorbed by the rubber cap receiving suction head 1, and is used to detect the color of the specific mark on the rubber cap. The stepper motor 3 is a hollow shaft stepper motor 3, and the output end is connected to the rubber cap receiving suction head 1, and is used to control the rubber cap receiving suction head 1 to rotate around its central axis.

[0047] The first detection photoelectric element 61 and the second detection photoelectric element 62 are respectively positioned in the receiving and output positions, corresponding to the respective positions of the cap receiving nozzle 1. The first detection photoelectric element 61 is used to detect whether the corresponding cap receiving nozzle 1 has received the cap, and the second detection photoelectric element 62 is used to detect whether the corresponding cap receiving nozzle 1 has blown out the cap. The color mark sensor 2 and the stepper motor 3 are both connected to the PLC system via the pneumatic slip ring 4. The first detection photoelectric element 61 and the second detection photoelectric element 62 are directly connected to the PLC system. In other embodiments, they can also be connected to the PLC system via the pneumatic slip ring 4.

[0048] The method for adjusting the circumferential consistency of the rubber cap includes the following steps:

[0049] Step 1: Receiving and outputting the rubber cap

[0050] Receiving position: The cap receiving suction head 1 absorbs the cap through negative pressure, and the first detection photoelectric 61 detects that the cap has been received by the cap receiving suction head 1 and transmits the signal to the PLC system;

[0051] Output position: The PLC system controls the switching of the first solenoid valve, switching the negative pressure of the cap receiving nozzle 1 at the output position to positive pressure, blowing the corresponding caps out to the collection unit for collection. The second detection photoelectric 62 detects that the caps have been sent out and transmits the signal to the PLC system for counting.

[0052] Step 2: Consistency adjustment and position exchange

[0053] After receiving the signal from the first detection photoelectric device 61, the PLC system controls the cap receiving head 1 at the receiving position to rotate around its central axis to adjust the circumferential position of the cap. After receiving the signal from the first detection photoelectric device 61 and the signal from the second detection photoelectric device 62, the PLC system controls the swing cylinder 5 to operate, causing the cap receiving heads 1 at the receiving position and the output position to swap positions, and controls the first solenoid valve of the cap receiving head 1 at the output position to switch to negative pressure.

[0054] Adjusting the circumferential position of the rubber cap: The PLC system controls the color mark sensor 2 to detect the corresponding position of the rubber cap and determine whether it is the color of the specific mark. If so, the circumferential position of the rubber cap is consistent, and the process proceeds to step 3. If not, the PLC system controls the stepper motor 3 to drive the rubber cap receiving nozzle 1 and the rubber cap it adsorbs to rotate around the central axis until the color mark sensor 2 recognizes the color of the specific mark on the rubber cap. The stepper motor 3 is then controlled to stop rotating, so that the circumferential position of the rubber cap is consistent.

[0055] Position exchange: The PLC system controls the second solenoid valve of the swing cylinder 5 to open, causing the swing cylinder 5 to rotate 180±3° forward or reverse, exchanging the positions of the output position and the receiving position of the rubber cap receiving suction head 1. The magnetic switch is set to sense the swing cylinder 5 and rotate it into place.

[0056] Step 3: After the magnetic switch senses that the swing cylinder 5 has rotated to the correct position, the swing cylinder 5 remains stationary.

[0057] Step 4: The control unit determines whether the count reaches a set number; in this embodiment, the set number is 50;

[0058] If yes, the adjustment of the circumferential consistency of the rubber caps is completed, and the collection unit collects 50 rubber caps with the same circumferential position and sends them out uniformly;

[0059] Otherwise, return to step 1.

[0060] The collection unit includes a vacuum receiving tube 7 and an adjustable mounting bracket 8 for securing the tube. The inlet of the vacuum receiving tube 7 is open and located at the output position. It corresponds to the cap receiving nozzle 1 at the output position and receives the caps discharged by the nozzle. After collecting 50 caps, the caps are blown out of the vacuum receiving tube 7 as a roll. To increase the strength of the vacuum receiving tube 7, reinforcing ribs are provided along the axial and circumferential sides.

[0061] A positive pressure cavity 10 is arranged circumferentially near the inlet of the vacuum receiving tube 7. The positive pressure cavity 10 is connected to the vacuum receiving tube 7 through air inlet holes 101 evenly arranged circumferentially along the vacuum receiving tube 7, and is connected to a positive pressure air source to provide a power source for blowing out the rubber cap. The air inlet holes 101 are arranged toward the outlet of the vacuum receiving tube 7, and their diameter gradually decreases along the air inlet direction, forming a tapered hole. Figure 5As shown, the angle between its central axis and the central axis of the vacuum receiving pipe 7 is 30-50 degrees, preferably 45 degrees. The outlet end of the vacuum receiving pipe 7 is provided with a cover plate 11, which has a certain sealing effect.

[0062] The vacuum receiving tube 7 is located between the cover plate 11 and the positive pressure cavity 10, and negative pressure holes 91 are evenly provided along the circumference. A negative pressure cavity 9 is provided on the periphery of the negative pressure hole 91, and the negative pressure cavity 9 is connected to the vacuum generator to generate negative pressure. When the rubber cap is blown out from the regulating unit, the positive pressure airflow is adjusted by setting a flow regulating valve to make the positive pressure airflow smaller, and only needs to reach a level that is just enough to blow the rubber cap out, to prevent the rubber cap from rotating due to excessive blowing force. Therefore, the uniform negative pressure generated by the negative pressure holes 91 evenly provided in the middle of the vacuum receiving tube 7 can relatively stably suck the rubber cap into the vacuum receiving tube 7. When negative pressure is passed through the vacuum receiving tube 7 and the cover plate 11 is closed, the side of the vacuum receiving tube 7 near the entrance of the negative pressure hole 91 is the negative pressure area 71. Figure 4 As shown, air enters the inlet of the vacuum collecting tube 7 and flows out through the negative pressure hole 91, providing momentum for the incoming rubber caps to move toward the outlet. The side of the negative pressure hole 91 near the outlet is the equilibrium zone 72, where there is no relative airflow. Therefore, the rubber caps entering the vacuum collecting tube 7 will stay in the equilibrium zone 72 near the negative pressure hole 91. When the next rubber cap enters, it will also move to this position, inserting into the previously entered rubber cap and pushing the previously entered rubber cap forward as a whole, so that all the collected rubber caps are located in the equilibrium zone 72.

[0063] The distance between negative pressure hole 91 and the entrance of vacuum receiving tube 7 should not be too long or too short. Taking into account work efficiency, positive pressure airflow, and negative pressure, this distance is set to 180-250mm, preferably 200mm. If the distance is too long, the rubber caps may rotate circumferentially. If the distance is too short, the rubber caps that enter later may catch up with the ones that enter earlier, causing congestion and jamming in negative pressure zone 71. The length of balance zone 72 is determined by the length of the entire roll of rubber caps and should be slightly longer than the entire roll to easily accommodate the entire roll of rubber caps.

[0064] In order to prevent the rubber cap from rotating twice and thus affecting the consistency, the inner wall of the negative pressure zone 71 of the vacuum receiving tube 7 is evenly provided with three axial arc-shaped edges 73, and the three arc-shaped edges 73 are staggered from the negative pressure holes. Figure 3As shown, the diameter a of the circle formed by the highest points of the three arc-shaped ridges 73 and the outer diameter R of the rubber cap satisfy the following equation: 1mm≤Ra≤3mm. The arc-shaped ridges 73 serve to compress and deform the outer wall of the rubber cap to a certain degree as it enters the vacuum tube, creating a concave-convex fit between the outer wall and the inner wall of the tube to prevent circumferential rotation. This deformation also increases the contact area between the outer wall and the inner wall of the tube, increasing friction and making circumferential rotation more difficult. A large difference between the diameter a and the outer diameter R of the rubber cap increases resistance to movement, while a small difference makes circumferential rotation impossible. Since there is no airflow in the balancing area 72, the later-entering rubber caps fit over the earlier-entering ones, making circumferential rotation extremely unlikely. Furthermore, because the rubber caps are stacked, the outer diameter of the entire roll is larger than that of a single cap. Therefore, the inner diameter of the balancing area 72 needs to be slightly larger than the outer diameter of the entire roll. If the arc-shaped ridges 73 are included, the rubber caps will jam during delivery.

[0065] In this embodiment, the collecting unit collects 50 rubber caps as a roll, and then sends out the roll of rubber caps in a unified manner. Specifically, after the PLC system counts 50 times, the vacuum receiving tube 7 collects 50 rubber caps. The PLC system controls the positive pressure on-off valve provided on the positive pressure gas source connecting pipeline to open, and sends the positive pressure gas into the vacuum receiving tube 7 through the positive pressure cavity 10 and the air inlet 101. The air inlet 101 pressurizes and accelerates the gas to blow obliquely into the vacuum receiving tube 7, pushing a roll of rubber caps forward, pushing open the cover plate 11 to send the rubber caps out for subsequent processes, closing the positive pressure on-off valve, and completing a complete set of work processes.

[0066] In other embodiments of the present invention, any number of rubber caps collected in the vacuum collecting tube 7 can be blown out for collection, and the total length of the stacked rubber caps must be less than the length of the balancing area 72 .

Claims

1. A system for adjusting the circumferential consistency of a rubber cap, characterized by: It includes a regulating unit, a collecting unit and a control unit; The adjustment unit comprises two rubber cap adjustment components, a first detection photoelectric device (61) and a second detection photoelectric device (62), and a second driving mechanism for driving the two rubber cap adjustment components to rotate and exchange positions; Define the positions of the two rubber cap adjustment components as receiving position and output position respectively; The rubber cap adjustment assembly comprises a rubber cap receiving nozzle (1), a color mark sensor (2) provided corresponding to the rubber cap adsorbed by the rubber cap receiving nozzle (1), and a first driving mechanism for driving the rubber cap receiving nozzle (1) to rotate around its central axis; The first detection photoelectric device (61) and the second detection photoelectric device (62) are respectively arranged at a receiving position and an output position, and correspond to the cap receiving suction head (1) at the position, and are used to detect whether a cap is adsorbed on the cap receiving suction head (1), and feed back the detection signal to the control unit, and the control unit controls the working state of the second driving mechanism according to the detection signal; The plastic cap receiving nozzle (1) is connected to a negative pressure or positive pressure air source, and the plastic cap receiving nozzle (1) is connected to a negative pressure adsorption external device for plastic caps at a receiving position, and is connected to a positive pressure air source at an output position to blow out the plastic caps; The color mark sensor (2) is used to detect and identify the color of a specific mark on the rubber cap, and feed back an identification signal of the color mark sensor (2) to the control unit, and the control unit controls the working state of the first driving mechanism according to the identification signal; The collecting unit comprises a vacuum collecting tube (7), the inlet of which corresponds to the rubber cap receiving nozzle (1) at the output position; The inlet end of the vacuum collecting tube (7) is connected to a positive pressure gas source for blowing out the collected rubber caps, and a cover plate (11) is provided at the outlet. A negative pressure hole (91) is provided between the inlet and the outlet of the vacuum collecting tube (7) for connecting negative pressure to provide power for the rubber caps to move axially in the vacuum collecting tube (7); The inner wall between the negative pressure hole (91) and the inlet of the vacuum receiving tube (7) is provided with at least one ridge along the axial direction, which is used to press the outer wall of the rubber cap to prevent the rubber cap from rotating in the circumferential direction.

2. A system for adjusting the circumferential consistency of a rubber cap according to claim 1, characterized in that: The distance between the negative pressure hole (91) and the entrance of the vacuum material receiving pipe (7) is 180-250 mm.

3. A system for adjusting the circumferential consistency of a rubber cap according to claim 1 or 2, characterized in that: There are multiple negative pressure holes (91) and they are evenly arranged along the circumference of the vacuum receiving tube (7). A negative pressure cavity (9) is provided on the outer periphery of the negative pressure hole (91). The vacuum receiving tube (7) is connected to the vacuum generator via the negative pressure hole (91) and the negative pressure cavity (9).

4. A system for adjusting the circumferential consistency of a rubber cap according to claim 3, characterized in that: The vacuum receiving pipe (7) is provided with a positive pressure cavity (10) along the circumference near the inlet thereof. The positive pressure cavity (10) is connected to the vacuum receiving pipe (7) through air inlet holes (101) uniformly provided along the circumference of the vacuum receiving pipe (7), and is also connected to a positive pressure air source. The air inlet (101) is arranged toward the outlet of the vacuum receiving tube (7), and its diameter gradually decreases along the air inlet direction of the air inlet (101), forming a tapered hole, the central axis of which is at an angle of 30-50° to the central axis of the vacuum receiving tube (7).

5. The system for adjusting the circumferential consistency of a rubber cap according to claim 4, characterized in that: The rubber cap receiving suction head (1) is in the shape of a truncated cone and has the same taper as the rubber cap, so that the rubber cap is sleeved on the rubber cap receiving suction head (1) and fits the rubber cap receiving suction head (1). The upper bottom surface of the truncated cone faces outward and is provided with a through hole, which is connected to the vacuum pump and the positive pressure gas source.

6. The system for adjusting the circumferential consistency of a rubber cap according to claim 5, characterized in that: The first driving mechanism is a stepping motor (3), the second driving mechanism is a swing cylinder (5), and the control unit is a PLC system; The collecting unit further comprises an adjusting fixing frame (8), and the vacuum collecting tube (7) is fixed by the adjusting fixing frame (8); The convex ridges are arc-shaped ridges (73), and there are three of them. The three arc-shaped ridges (73) are evenly distributed along the circumference of the inner wall of the vacuum receiving tube (7) and are staggered with the negative pressure holes. The diameter a of the circle formed by the highest points of the three arc-shaped ridges (73) and the outer diameter R of the rubber cap satisfy the following formula: 1mm≤Ra≤3mm; The angle between the air inlet (101) and the central axis of the vacuum receiving tube (7) is 45°; The distance from the negative pressure hole (91) to the entrance of the vacuum material receiving pipe (7) is 200 mm.

7. The system for adjusting the circumferential consistency of a rubber cap according to claim 6, characterized in that: It also includes a pneumatic slip ring (4) and a rotating platform (12) connected to the output end of the swing cylinder (5); The two rubber cap adjustment components are respectively located at two ends of the rotating platform (12); The pneumatic slip ring (4) is located at the center of the rotating platform (12); the rubber cap receiving nozzle (1) is connected to a negative pressure or positive pressure air source via the pneumatic slip ring (4); and the control unit is connected to a color mark sensor (2) and a stepping motor (3) via the pneumatic slip ring (4).

8. A method for adjusting the circumferential consistency of a rubber cap, based on the system for adjusting the circumferential consistency of a rubber cap according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, receiving and output rubber cap Receiving position: the cap receiving suction head (1) receives and adsorbs the cap delivered by the external device, the first detection photoelectric (61) detects that the cap has been received by the cap receiving suction head (1), and transmits the receiving detection signal to the control unit; Output position: the control unit controls the negative pressure of the plastic cap receiving suction head (1) to switch to positive pressure, blows out the corresponding plastic cap and collects it through the vacuum receiving tube (7), and the second detection photoelectric (62) detects that the plastic cap has been sent out, transmits the output detection signal to the control unit, and the control unit performs one count; S2, circumferential position adjustment and position exchange of rubber cap The control unit controls the plastic cap receiving suction head (1) at the receiving position to rotate around its central axis to adjust the circumferential position of the plastic cap to be consistent. After receiving the signal of the first detection photoelectric (61) and the signal of the second detection photoelectric (62), the control unit controls the second driving mechanism to operate so that the plastic cap receiving suction head (1) at the receiving position and the output position are exchanged, and at the same time, the positive pressure of the plastic cap receiving suction head (1) at the output position is switched to negative pressure. S3, the control unit determines whether the count reaches the set number, if so, the adjustment of the circumferential consistency of the rubber cap is completed, otherwise, return to step S1.

9. The method for adjusting the circumferential consistency of a rubber cap according to claim 8, characterized in that: After step S3, the following steps are also included: S4, when the count reaches the set number, the air inlet (101) of the vacuum receiving tube (7) is connected to the positive pressure gas source, so that the positive pressure gas pushes the rubber cap to move toward the outlet of the vacuum receiving tube (7), and the cover plate (11) is opened to send the rubber cap out for subsequent processes.

10. The method for adjusting the circumferential consistency of a rubber cap according to claim 9, characterized in that: In step S1, the vacuum collecting tube (7) collects specifically: The negative pressure hole (91) of the vacuum receiving tube (7) is connected to the negative pressure, so that the rubber caps entering the vacuum receiving tube (7) move to the side of the negative pressure hole (91) close to the outlet; the rubber caps entering later push the rubber caps entering earlier to move toward the outlet as a whole, thereby realizing the collection of multiple rubber caps; In step S2, the circumferential position adjustment of the rubber cap is specifically as follows: the control unit controls the color mark sensor (2) at the receiving position to detect the corresponding rubber cap, and determines whether the color of the specific mark is detected. If the color of the specific mark is not detected, the control unit controls the stepper motor (3) to rotate, driving the rubber cap receiving suction head (1) and the rubber cap to rotate around the central axis thereof, until the color mark sensor (2) recognizes the color of the specific mark on the rubber cap, and the control unit controls the stepper motor (3) to stop rotating, so that the circumferential position of the rubber cap is consistent; if yes, the circumferential position of the rubber cap is consistent, and the process proceeds to step S3; The position exchange is specifically as follows: the control unit controls the second driving mechanism to rotate forward or reverse, exchanging the positions of the rubber cap receiving suction head (1) at the receiving position and the output position, and the second driving mechanism is a swing cylinder (5).

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