Medicinal rubber plug coating device

Abstract

The invention provides a medicinal rubber plug coating device which comprises a vacuum cavity, a first vacuum pump and a first vacuum electromagnetic valve which are communicated with the interior of the vacuum cavity are arranged on one side of the vacuum cavity, sputter coating equipment is arranged at the bottom of the vacuum cavity, and runway-shaped rails are arranged on the two inner walls of the vacuum cavity. Runway-shaped transmission belts are connected to one sides of the runway-shaped rails, a driving motor is installed on the outer side of the vacuum cavity, and a plurality of strip-shaped connecting grooves are connected between the two runway-shaped transmission belts. Hollow negative-pressure hanging strips are slidably connected into the strip-shaped connecting grooves, a plurality of first negative-pressure suction holes are formed in the outer sides of the hollow negative-pressure hanging strips, and supporting springs and electromagnets are connected between the strip-shaped connecting grooves and the corresponding hollow negative-pressure hanging strips; and one end of the vacuum cavity is provided with a second vacuum pump for vacuumizing the hollow negative-pressure hanging strip, and one end of the vacuum cavity is provided with a second vacuum electromagnetic valve for feeding air into the hollow negative-pressure hanging strip. According to the invention, rubber plug coating can be continuously carried out in a vacuum environment, and the working efficiency is obviously improved.

Description

Technical Field

[0001] The invention belongs to the field of coating machines and relates to a coating device for medicinal rubber plugs. Background Art

[0002] As a key component in drug packaging, the main function of pharmaceutical rubber stoppers is to ensure the sealing and stability of drugs, prevent the intrusion of air, moisture and microorganisms, and thus protect the quality and safety of drugs. However, rubber stoppers that have not been specially treated may contain soluble or volatile substances, which may migrate into drugs when in long-term contact with drugs, affecting the purity and efficacy of drugs, and even producing harmful byproducts. In addition, the chemical activity of the rubber material itself may also react with certain drug ingredients, further affecting the stability and safety of drugs. Therefore, in order to improve the inertness of rubber stoppers, reduce their interaction with drugs, and enhance their physical properties, such as wear resistance and corrosion resistance, pharmaceutical rubber stopper coating technology came into being.

[0003] Existing coating technologies for pharmaceutical rubber stoppers mainly include chemical plating, electroplating and physical vapor deposition (PVD) methods. Among them, sputtering coating, as a type of physical vapor deposition, is widely used in the field of pharmaceutical rubber stopper coating because it can achieve the preparation of thin films with high purity, uniformity and strong bonding force. Sputtering coating places the target material (usually a metal or alloy) in a vacuum environment and uses high-speed ions to bombard the surface of the target material, so that the target atoms or molecules are sputtered out and deposited on the surface of the rubber stopper to form a dense protective film. This coating method can effectively isolate the rubber stopper from direct contact with the drug, reduce potential chemical reactions, and at the same time give the rubber stopper better mechanical properties and chemical stability.

[0004] However, although sputtering coating technology has shown significant advantages in the surface treatment of pharmaceutical rubber stoppers, it still has some limitations in practical applications. Especially when using vacuum coating equipment for batch coating, the interior of the coating machine needs to be re-vacuumed before each coating. This process not only consumes time and energy, but may also lead to low production efficiency. In addition, after completing a batch of coating, reloading the rubber stoppers to prepare for the next round of coating also requires additional time and manpower, which undoubtedly further reduces the continuous working efficiency of batch coating of rubber stoppers. Summary of the invention

[0005] The object of the present invention is to provide a medicinal rubber stopper coating device, which can continuously coat the rubber stopper in a vacuum environment without the need for re-vacuuming, and can significantly improve the working efficiency of the rubber stopper coating.

[0006] In order to solve the above technical problems, the present invention provides a coating device for medicinal rubber stoppers, comprising a vacuum chamber, a first vacuum pump is arranged on one side of the vacuum chamber, an inlet end of the first vacuum pump is connected to the vacuum chamber, a first vacuum solenoid valve is connected to one side of the vacuum chamber, a sputtering coating device is arranged at the bottom of the vacuum chamber, a sputtering source of the sputtering coating device is arranged upward at the bottom of the vacuum chamber, a runway-shaped track is arranged at the upper part of the inner wall at both ends of the vacuum chamber, a runway-shaped transmission belt moving along the shape of each runway-shaped track is connected to the opposite side of each runway-shaped track, a driving motor for driving the runway-shaped transmission belt to move is installed on the outside of the vacuum chamber, a plurality of strip-shaped connecting grooves distributed along the length direction of the two runway-shaped transmission belts are connected between the two runway-shaped transmission belts, and the opening of each strip-shaped connecting groove is arranged outward;

[0007] A hollow negative pressure suspension strip that can slide outward is slidably connected in each strip connection groove, and a plurality of first negative pressure suction holes distributed along the length direction and connected to the inside of each hollow negative pressure suspension strip are provided on the outside of each hollow negative pressure suspension strip, and the first negative pressure suction holes are used to suck the crown of the rubber plug, and a strip feed port and a strip discharge port for the hollow negative pressure suspension strip to extend upward are provided on the upper end of the vacuum cavity, and a plurality of supporting springs are connected between the inner bottom of each strip connection groove and the outer bottom of the corresponding hollow negative pressure suspension strip, and a plurality of electromagnets are provided on the inner bottom of each strip connection groove, and the bottom of each hollow negative pressure suspension strip is made of a metal material that can be magnetically attracted by the electromagnet;

[0008] One end of the vacuum chamber is provided with an exhaust hole and an air inlet hole that penetrates the corresponding runway-shaped track inwardly, the exhaust hole corresponds to the position of the strip-shaped feed port, and the air inlet hole corresponds to the position of the strip-shaped discharge port, a second vacuum pump is provided at one end of the vacuum chamber, an exhaust pipe is connected between the inlet end of the second vacuum pump and the outer end of the exhaust hole, and the outer end of the air inlet hole is connected to a second vacuum solenoid valve, one end of each strip-shaped connecting groove is provided with a sealed air vent that matches the exhaust hole or the air inlet hole, and one end of each hollow negative pressure suspension strip is provided with inlet and outlet holes that are connected to the corresponding sealed air vents, when the hollow negative pressure suspension strip is located at the strip-shaped feed port, the sealed air vent is connected to the exhaust hole, and when the hollow negative pressure suspension strip is located at the strip-shaped discharge port, the sealed air vent is connected to the air inlet hole.

[0009] By adopting the above technical scheme, the hollow negative pressure suspension strip located at the strip-shaped feed port is not attracted by the electromagnet, and is pushed out of the strip-shaped feed port to stick to the crown of the rubber plug under the push of the support spring. At this time, the sealing vent is directly opposite to the exhaust hole. The second vacuum pump evacuates the hollow negative pressure suspension strip, so that the first negative pressure suction hole generates negative pressure to suck the crown of the rubber plug. The electromagnet is energized to generate magnetism to suck the hollow negative pressure suspension strip downward, so that the hollow negative pressure suspension strip and the rubber plug are both received into the strip-shaped connecting groove. Driven by the driving motor, the strip gradually rotates downward following the runway-shaped transmission belt. At this time, the electromagnet is powered off, and the rubber plug is pushed out of the strip-shaped connecting groove under the push of the support spring. The sputtering coating equipment uses high-speed ions to bombard the surface of the target material, so that the target atoms or molecules are sputtered out and deposited on the surface of the rubber plug to form a dense protective film.

[0010] As the runway-shaped transmission belt continues to rotate, the electromagnet is energized again to suck the rubber plug into the strip connecting groove until it rotates to the strip feed port. The electromagnet is de-energized, and the rubber plug extends out of the strip feed port under the push of the supporting spring. At this time, the sealing vent is connected to the air inlet, and the second vacuum solenoid valve is opened to allow air to enter the hollow negative pressure suspension strip. After the rubber plug loses the negative pressure attraction, it can be pushed away from the vacuum chamber and then collected to complete the continuous rubber plug coating.

[0011] The present invention is further configured to include a feeding hopper with an upper opening, the lower end of the feeding hopper is connected to a strip collecting trough, the bottom of the feeding hopper is converged toward the strip collecting trough, the strip collecting trough is provided with an output port at one end facing the vacuum chamber, a negative pressure conveyor is provided at the bottom of the strip collecting trough, one end of the negative pressure conveyor extends from the output port, the negative pressure conveyor includes a first strip frame, a hollow negative pressure strip arranged in the first strip frame, a negative pressure conveyor belt covered with upper and lower sides of the hollow negative pressure strip, and a negative pressure conveying motor for driving the negative pressure conveyor belt to move;

[0012] It also includes a third vacuum pump, the inlet end of the third vacuum pump is connected to the hollow negative pressure strip through a suction pipe, the upper end of the hollow negative pressure strip in the strip collecting groove is provided with a strip-shaped negative pressure hole connected to the interior and arranged along the length direction thereof, the negative pressure conveyor belt is provided with a plurality of second negative pressure suction holes distributed along the length direction thereof, and the second negative pressure suction holes are used to suck the crown of the rubber stopper;

[0013] The vacuum chamber is provided with two oppositely arranged clamping conveyors above the strip-shaped feed port, each clamping conveyor includes a second strip frame, a clamping conveyor belt movable in the second strip frame, and two transmission shafts rotatably connected to the second strip frame and located inside the two ends of the clamping conveyor belt. A clamping conveying motor for driving the clamping conveyor belt to move is installed on the outer side of the second strip frame. The opposite sides of each second strip frame are open, and the two conveyor belts are used to cooperate in clamping the skirt of the rubber stopper. One end of each clamping conveyor extends to the upper end of the free end of the negative pressure conveyor, so as to clamp and transport the rubber stopper on the negative pressure conveyor.

[0014] By adopting the above technical solution, the cleaned rubber stopper is first placed in the feeding hopper, and the third vacuum pump evacuates the hollow negative pressure strip. After the second negative pressure suction hole is connected with the strip-shaped negative pressure hole, negative pressure is generated to suck the crown of the rubber stopper, and the rubber stopper is driven to be transported to the output port with the movement of the negative pressure conveyor belt. In the process, the fixed rubber stopper is driven to stir the other rubber stoppers, so that more rubber stoppers can be sucked with the crown facing downward;

[0015] The sucked rubber plug loses the negative pressure after leaving the strip negative pressure hole, and only moves with the pressure conveyor belt, accumulates in front of the spacing adjustment turntable, and is gradually clamped by the rubber plug clamp on the rotating spacing adjustment turntable, and the spacing is evenly increased to make the spacing of the first negative pressure suction holes equal. After passing the spacing adjustment turntable, the rubber plugs are clamped and transported by two clamping conveyors along with the negative pressure conveyor belt until they arrive at the strip feed port in a row, so that the hollow negative pressure suspension strip can suck the crown of the rubber plug and continuously feed the rubber plug.

[0016] The present invention is further configured such that a spacing adjustment turntable is rotatably connected to the upper end of the portion of the negative pressure conveyor extending out of the output port, a plurality of circumferentially distributed rubber plug snap-ins are provided on the outer circumference of the spacing adjustment turntable, the shape of each rubber plug snap-in matches the shape of the rubber plug, and a spacing adjustment motor for driving the spacing adjustment turntable to rotate is installed on the outer side of the negative pressure conveyor.

[0017] The present invention is further configured such that an elastic sponge strip is arranged in each second strip frame, and each clamping conveyor belt is arranged on the left and right sides of the corresponding elastic sponge body.

[0018] The present invention is further configured such that the clamping and conveying motor is installed at one end of one of the second strip frames, the power output shaft of the clamping and conveying motor is connected to the transmission shaft at the corresponding position, and one end of the root transmission shaft close to the clamping and conveying motor is connected to a transmission gear, and the two transmission gears are meshed.

[0019] The present invention is further configured such that the vacuum chamber is provided with a discharge conveyor above the strip-shaped discharge port, the discharge conveyor comprising a third strip frame, a discharge conveyor belt movable in the third strip frame, and a discharge conveyor motor installed on the outside of the third strip frame for driving the discharge conveyor belt to move, the third strip frame is open on one side of the strip-shaped discharge port, a plurality of push strips distributed along the length direction of the discharge conveyor belt are upwardly arranged on the outside of the discharge conveyor belt, and one end of the discharge conveyor extends outward from the vacuum chamber.

[0020] The present invention is further configured such that both of the two runway-shaped transmission belts are chains, two drive shafts are rotatably connected between the two runway-shaped tracks, the power output shaft of the drive motor is connected to one of the drive shafts, and both ends of each drive shaft are provided with drive sprockets meshing with the inner side of one end of the corresponding runway-shaped transmission belt.

[0021] The present invention is further configured such that a movable gap is left between one end of each hollow negative pressure suspension strip close to the corresponding sealed ventilation hole and the inner wall of the corresponding strip connecting groove, each air inlet and outlet hole is connected to the corresponding sealed ventilation hole through a ventilation hose in the corresponding movable gap, and the outer end of each hollow negative pressure suspension strip is provided with a sealing cover plate which is sealingly and slidingly connected to the corresponding strip connecting groove and is used to cover the corresponding ventilation hose.

[0022] The present invention is further configured such that a racetrack-shaped conductive slip ring is arranged on the inner side of a racetrack-shaped track, a sliding brush electrically connected to the racetrack-shaped conductive slip ring is arranged at one end of each strip-shaped connecting groove, and the electromagnet in each strip-shaped connecting groove is electrically connected to the sliding brush on its outer side.

[0023] The present invention is further configured such that a rubber sealing ring of the outer sleeve corresponding to the sealing vent hole is provided on the outer side of one end of each strip-shaped connecting groove.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] First, the present invention can continuously add rubber plugs into the vacuum chamber without interrupting the vacuum, and can also discharge the rubber plugs without interrupting the vacuum after coating in the vacuum chamber. It does not need to re-evacuate each time the material is added or discharged, and the rubber plugs are continuously coated, which can significantly improve the working efficiency of the rubber plug coating.

[0026] Secondly, the present invention can also automatically supply rubber plugs into the vacuum chamber for coating, without the need for manual loading, and can automatically discharge the materials after coating is completed, which can not only effectively improve the efficiency of feeding and discharging materials, but also effectively reduce labor costs;

[0027] Thirdly, when loading the rubber stoppers, the present invention can automatically sort the rubber stoppers so that the rubber stoppers can be transported to the vacuum chamber with the crown facing downward, making it easy to grab the rubber stoppers by negative pressure suction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 3 It is a partial cross-sectional view used to show the internal structure of the vacuum chamber;

[0031] Figure 4 Used to show the strip-shaped connecting grooves between the runway-shaped tracks;

[0032] Figure 5 It is a partial cross-sectional view used to show the internal structure of the strip connection groove and the rubber sealing ring at its end;

[0033] Figure 6 It is a partial cross-sectional view used to show the internal structure of the strip connection groove and the sliding brush at its end;

[0034] Figure 7 Used to show exhaust and air intake holes on a runway-shaped track;

[0035] Figure 8 Used to demonstrate the racetrack-shaped conductive slip ring on the racetrack-shaped track;

[0036] Fig. 9 It is a partial cross-sectional view used to show the internal structure of the negative pressure conveyor;

[0037] Fig.10 It is a partial cross-sectional view used to show the internal structure of the clamping conveyor;

[0038] Fig.11 It is a partial cross-sectional view used to show the internal structure of the discharge conveyor.

[0039] Among them, 1. vacuum chamber; 2. first vacuum pump; 3. first vacuum solenoid valve; 4. sputtering coating equipment; 5. sputtering source; 6. racetrack track; 7. racetrack transmission belt; 8. driving shaft; 9. driving motor; 10. driving sprocket; 11. strip connection groove; 12. hollow negative pressure suspension strip; 13. first negative pressure suction hole; 14. strip feed port; 15. strip discharge port; 16. supporting spring; 17. electromagnet; 18. racetrack conductive slip ring; 19. sliding brush; 20. exhaust hole; 21. air inlet; 22. second vacuum pump; 23. exhaust pipe; 24. second vacuum solenoid valve; 25. sealing vent; 26. rubber sealing ring; 27. ventilation soft Tube; 28, sealing cover plate; 29, feeding hopper; 30, strip collecting trough; 31, output port; 32, first strip rack; 33, hollow negative pressure strip; 34, negative pressure conveyor belt; 35, negative pressure conveying motor; 36, third vacuum pump; 37, suction pipe; 38, strip negative pressure hole; 39, second negative pressure suction hole; 40, second strip rack; 41, clamping conveyor belt; 42, transmission shaft; 43, elastic sponge strip; 44, smooth rubber strip; 45, clamping conveying motor; 46, transmission gear; 47, spacing adjustment turntable; 48, rubber plug bayonet; 49, spacing adjustment motor; 50, third strip rack; 51, discharge conveyor belt; 52, discharge conveying motor; 53, push strip. DETAILED DESCRIPTION

[0040] The following is a further detailed description of a medicinal rubber stopper coating device proposed by the present invention in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will become clearer. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. The same or similar reference numerals in the accompanying drawings represent the same or similar components.

[0041] Example, see Figure 1-11A coating device for a medicinal rubber stopper includes a vacuum chamber 1. A first vacuum pump 2 is disposed on one side of the vacuum chamber 1. The inlet end of the first vacuum pump 2 is connected to the vacuum chamber 1. A first vacuum solenoid valve 3 is connected to one side of the vacuum chamber 1. The free end of the first vacuum solenoid valve 3 is connected to the outside and is used to suck air into the vacuum chamber 1 to balance the internal and external air pressures. A sputtering coating device 4 is disposed at the bottom of the vacuum chamber 1. A sputtering source 5 of the sputtering coating device 4 is disposed upward at the bottom of the vacuum chamber 1. The sputtering coating device 4 uses high-speed ions to bombard the surface of the target material, so that the target atoms or molecules are sputtered out and deposited on the surface of the rubber stopper to form a dense protective film. The sputtering coating device 4 and the sputtering source 5 are prior art, so they are not elaborated in detail in this embodiment. A runway-shaped track 6 is provided on the upper part of the inner wall at both ends of the vacuum chamber 1, and a runway-shaped transmission belt 7 moving along its shape is connected to the opposite side of each runway-shaped track 6, and the two runway-shaped transmission belts 7 are chains. Two driving shafts 8 are rotatably connected between the two runway-shaped tracks 6, and a driving motor 9 for driving the runway-shaped transmission belt 7 to move is installed on the outside of the vacuum chamber 1. The power output shaft of the driving motor 9 is connected to one of the driving shafts 8, and a driving sprocket 10 meshing with the inner side of one end of the corresponding runway-shaped transmission belt 7 is provided at both ends of each driving shaft 8, and the two runway-shaped transmission belts 7 are driven to move by the driving motor 9.

[0042] A plurality of strip-shaped connecting grooves 11 distributed along the length direction are connected between the two runway-shaped transmission belts 7. The opening of each strip-shaped connecting groove 11 is set outward. The edge of the opening end of the strip-shaped connecting groove 11 is a rubber strip, and the edge of the opening end of the strip-shaped connecting groove 11 can contact the inner wall of the vacuum chamber 1 to prevent air leakage in the vacuum chamber 1. Each strip connecting groove 11 is slidably connected with a hollow negative pressure suspension strip 12 that can slide outward. The outer side of each hollow negative pressure suspension strip 12 is provided with a plurality of first negative pressure suction holes 13 distributed along its length direction and connected with its interior. The first negative pressure suction holes 13 are used to suck the crown of the rubber stopper. The upper end of the vacuum chamber 1 is provided with a strip feed port 14 and a strip discharge port 15 for the hollow negative pressure suspension strip 12 to extend upward. Two supporting springs 16 are connected between the inner bottom of each strip connecting groove 11 and the outer bottom of the corresponding hollow negative pressure suspension strip 12. The elasticity of the supporting springs 16 drives the hollow negative pressure suspension strip 12 to slide out of the strip connecting groove 11. Two electromagnets 17 are provided on the inner bottom of each strip connecting groove 11. The bottom of each hollow negative pressure suspension strip 12 is made of metal material that can be magnetically attracted by the electromagnet 17. The electromagnet 17 attracts the hollow negative pressure suspension strip 12 and makes it slide into the bottom of the strip connecting groove 11. A racetrack-shaped conductive slip ring 18 is arranged on the inner side of one of the racetrack-shaped tracks 6, and a sliding brush 19 is arranged at one end of each strip-shaped connecting groove 11, which is slidingly electrically connected to the racetrack-shaped conductive slip ring 18. The electromagnet 17 in each strip-shaped connecting groove 11 is electrically connected to the sliding brush 19 on its outer side. The specific internal sensing elements and control elements are not explained in detail, and the corresponding technicians are free to design them according to needs.

[0043] The front end of the vacuum chamber 1 is provided with an exhaust hole 20 and an air inlet 21 penetrating the corresponding runway-shaped track 6. The exhaust hole 20 corresponds to the position of the strip-shaped feed port 14, and the air inlet 21 corresponds to the position of the strip-shaped discharge port 15. A second vacuum pump 22 is provided at one end of the vacuum chamber 1. An exhaust pipe 23 is connected between the inlet end of the second vacuum pump 22 and the outer end of the exhaust hole 20. The outer end of the air inlet 21 is connected to a second vacuum solenoid valve 24, and the free end of the second vacuum solenoid valve 24 is connected to the outside. A sealing vent 25 matching the exhaust hole 20 or the air inlet 21 is provided at one end of each strip-shaped connecting groove 11. A rubber sealing ring 26 with a circle of outer sleeve corresponding to the sealing vent 25 is provided on the outer side of one end of each strip-shaped connecting groove 11. The rubber sealing ring 26 is slidably connected to the inner wall of the runway-shaped track 6 to prevent air leakage from the sealing vent 25. One end of each hollow negative pressure suspension strip 12 is provided with an air inlet and outlet hole (not shown) connected to the corresponding sealed vent hole 25. A movable gap is left between the end of each hollow negative pressure suspension strip 12 close to the corresponding sealed vent hole 25 and the inner wall of the corresponding strip connecting groove 11. Each air inlet and outlet hole is connected to the corresponding sealed vent hole 25 through a ventilation hose 27 in the corresponding movable gap. The outer end of each hollow negative pressure suspension strip 12 is provided with a sealing cover plate 28 which is sealingly and slidably connected to the corresponding strip connecting groove 11 and is used to cover the corresponding ventilation hose 27, thereby increasing the sealing performance of the strip connecting groove 11. When the hollow negative pressure suspension strip 12 is located at the strip-shaped feed port 14, the sealed vent hole 25 is connected with the exhaust hole 20, and the hollow negative pressure suspension strip 12 can be evacuated by the second vacuum pump 22. When the hollow negative pressure suspension strip 12 is located at the strip-shaped discharge port 15, the sealed vent hole 25 is connected with the air inlet hole 21, so that air enters the hollow negative pressure suspension strip 12 through the second vacuum solenoid valve 24, so that the air pressure balance in the hollow negative pressure suspension strip 12 is restored.

[0044] The vacuum chamber 1 further comprises a feeding hopper 29 with an opening at the upper end, a strip collecting trough 30 being connected to the lower end of the feeding hopper 29, the bottom of the feeding hopper 29 being converged toward the strip collecting trough 30, an output port 31 being provided at one end of the strip collecting trough 30 facing the vacuum chamber 1, a negative pressure conveyor being provided at the bottom of the strip collecting trough 30, one end of the negative pressure conveyor extending from the output port 31, the negative pressure conveyor comprising a first strip frame 32, a hollow negative pressure strip 33 provided in the first strip frame 32, a negative pressure conveyor belt 34 being provided on the upper and lower sides of the hollow negative pressure strip 33, and a negative pressure conveying motor 35 for driving the negative pressure conveyor belt 34 to move.

[0045] The third vacuum pump 36 is also included. The inlet end of the third vacuum pump 36 is connected to the hollow negative pressure strip 33 through a suction pipe 37. The upper end of the hollow negative pressure strip 33 in the strip collecting groove 30 is provided with a strip negative pressure hole 38 connected to the interior and arranged along the length direction thereof. The portion of the hollow negative pressure strip 33 extending out of the strip collecting groove 30 does not have the strip negative pressure hole 38. The negative pressure conveyor belt 34 is provided with a plurality of second negative pressure suction holes 39 distributed along the length direction thereof. The suction hole 39 is used to suck the crown of the rubber stopper. When the hollow negative pressure strip 33 is evacuated by the third vacuum pump 36, the hollow negative pressure strip 33 generates negative pressure so that the second negative pressure suction hole 39 can suck the crown of the rubber stopper. Since the skirt of the rubber stopper is irregular and difficult to be sucked, the rubber stoppers delivered from the output port 31 are all with the crown facing downward. Of course, there is also a situation where the rubber stoppers that are not sucked are squeezed out of the output port 31. The fallen rubber stoppers can be recovered and put back into the feeding hopper 29.

[0046] The vacuum chamber 1 is provided with two clamping conveyors arranged opposite to each other above the strip-shaped feed port 14, each of which includes a second strip frame 40, a clamping conveyor belt 41 movable in the second strip frame 40, and two transmission shafts 42 rotatably connected to the second strip frame 40 and located inside the two ends of the clamping conveyor belt 41. An elastic sponge strip 43 is provided in each second strip frame 40, and each clamping conveyor belt 41 is provided on the left and right sides of the corresponding elastic sponge body. A smooth rubber strip 44 is provided on the left and right sides of each elastic sponge strip 43, and the elastic sponge strip 43 increases the elasticity and support of the clamping conveyor belt 41, which helps the clamping conveyor belt 41 to firmly clamp the rubber plug. A clamping conveying motor 45 is installed at one end of the second bar frame 40 away from the hopper 29. The power output shaft of the clamping conveying motor 45 is connected to the transmission shaft 42 at the corresponding position. A transmission gear 46 is connected to one end of the transmission shaft 42 near the clamping conveying motor 45. The two transmission gears 46 are meshed, and the two clamping conveying belts 41 can be driven to move relative to each other by using one clamping conveying motor 45. The opposite side of each second bar frame 40 is open, and the two conveying belts are used to clamp the skirt of the rubber plug. One end of each clamping conveyor extends to the upper end of the free end of the negative pressure conveyor, which is used to clamp and transport the rubber plug on the negative pressure conveyor.

[0047] A spacing adjustment turntable 47 is rotatably connected to the upper end of the part of the negative pressure conveyor extending out of the output port 31. The spacing adjustment turntable 47 is close to the head ends of the two clamping conveyors. A plurality of rubber plug snap-in slots 48 distributed in a circle are provided on the outer periphery of the spacing adjustment turntable 47. The shape of each rubber plug snap-in slot 48 matches the shape of the rubber plug. A spacing adjustment motor 49 for driving the spacing adjustment turntable 47 to rotate is installed on the outer side of the negative pressure conveyor. The rotation speed of the spacing adjustment motor 49 is controlled to evenly insert the rubber plug into the rubber plug snap-in slot 48 and then disengage it from the rubber plug snap-in slot 48. Subsequently, the rubber plug is clamped and transported by the two clamping conveyors along with the conveyance of the negative pressure conveyor.

[0048] A discharge conveyor is arranged above the strip discharge port 15 of the vacuum chamber 1, and the discharge conveyor includes a third strip frame 50, a discharge conveyor belt 51 movable in the third strip frame 50, and a discharge conveyor motor 52 installed on the outside of the third strip frame 50 for driving the discharge conveyor belt 51 to move. The third strip frame 50 opens on one side of the strip discharge port 15, and a plurality of push strips 53 distributed along the length direction of the discharge conveyor belt 51 are arranged upward on the outside of the discharge conveyor belt 51. One end of the discharge conveyor extends outward from the vacuum chamber 1, and the rubber plug extending from the strip discharge port 15 after coating is pushed by the push strip 53 to be pulled away from the vacuum chamber 1 and then collected.

[0049] Working principle: First, put the cleaned rubber plug into the hopper 29, and the third vacuum pump 36 evacuates the hollow negative pressure strip 33. After the second negative pressure suction hole 39 is connected with the strip negative pressure hole 38, negative pressure is generated to suck the crown of the rubber plug. The movement of the negative pressure conveyor belt 34 drives the rubber plug to be conveyed to the output port 31. In the process, the fixed rubber plug is driven to stir the other rubber plugs, so that more rubber plugs can be sucked with the crown facing downwards.

[0050] The sucked rubber plug loses the negative pressure after leaving the strip negative pressure hole 38, and only moves with the pressure conveyor belt, and accumulates in front of the spacing adjustment turntable 47, and is gradually clamped by the rubber plug clamping 48 on the rotating spacing adjustment turntable 47, and the spacing is evenly increased to make the spacing of the first negative pressure suction hole 13 equal. After passing through the spacing adjustment turntable 47, the rubber plug is clamped and conveyed by the two clamping conveyors along with the negative pressure conveyor belt 34, until it arrives at the strip feed port 14 in a row;

[0051] The hollow negative pressure suspension strip 12 located at the strip-shaped feed port 14 is not attracted by the electromagnet 17, and is pushed out of the strip-shaped feed port 14 to stick to the crown of the rubber plug under the push of the support spring 16. At this time, the sealing vent 25 is directly opposite to the exhaust hole 20. The second vacuum pump 22 evacuates the hollow negative pressure suspension strip 12, so that the first negative pressure suction hole 13 generates negative pressure to suck the crown of the rubber plug. The electromagnet 17 is energized to generate magnetism to suck the hollow negative pressure suspension strip 12 downward, so that the hollow negative pressure suspension strip 12 and the rubber plug are both received into the strip-shaped connecting groove 11. Under the drive of the driving motor 9, the runway-shaped transmission belt 7 gradually rotates downward. At this time, the electromagnet 17 is powered off, and the rubber plug is pushed out of the strip-shaped connecting groove 11 under the push of the support spring 16. The sputtering coating equipment 4 uses high-speed ions to bombard the surface of the target material, so that the target atoms or molecules are sputtered out and deposited on the surface of the rubber plug to form a dense protective film.

[0052] As the runway-shaped transmission belt 7 continues to rotate, the electromagnet 17 is energized again to suck the rubber plug into the strip connecting groove 11 until it rotates to the strip feed port 14. The electromagnet 17 is de-energized, and the rubber plug extends out of the strip feed port 14 under the push of the support spring 16. At this time, the sealing vent 25 is connected to the air inlet 21, and the second vacuum solenoid valve 24 is opened to allow air to enter the hollow negative pressure suspension strip 12. After the rubber plug loses the negative pressure attraction, the discharge conveyor can push the rubber plug away from the vacuum chamber 1 through the push bar 53, and then collect it to complete the continuous rubber plug coating.

[0053] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0054] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A coating device for a medicinal rubber stopper, comprising a vacuum chamber (1), a first vacuum pump (2) being arranged on one side of the vacuum chamber (1), an inlet end of the first vacuum pump (2) being connected to the vacuum chamber (1), a first vacuum solenoid valve (3) being connected to one side of the vacuum chamber (1), a sputtering coating device (4) being arranged at the bottom of the vacuum chamber (1), a sputtering source (5) of the sputtering coating device (4) being arranged upward at the bottom of the vacuum chamber (1), characterized in that: The upper part of the inner wall at both ends of the vacuum chamber (1) is provided with a racetrack-shaped track (6), and the opposite side of each racetrack-shaped track (6) is connected to a racetrack-shaped transmission belt (7) that moves along the shape thereof, and a driving motor (9) for driving the racetrack-shaped transmission belt (7) to move is installed on the outer side of the vacuum chamber (1), and a plurality of strip-shaped connecting grooves (11) distributed along the length direction thereof are connected between the two racetrack-shaped transmission belts (7), and the opening of each strip-shaped connecting groove (11) is arranged outward; Each strip-shaped connecting groove (11) is slidably connected with a hollow negative pressure suspension strip (12) capable of sliding outwards. The outer side of each hollow negative pressure suspension strip (12) is provided with a plurality of first negative pressure suction holes (13) distributed along its length direction and connected with its interior. The first negative pressure suction holes (13) are used to suck the crown of the rubber plug. The upper end of the vacuum chamber (1) is provided with a strip-shaped feed port (14) and a strip-shaped discharge port (15) for the hollow negative pressure suspension strip (12) to extend upwards. A plurality of supporting springs (16) are connected between the inner bottom of each strip-shaped connecting groove (11) and the outer bottom of the corresponding hollow negative pressure suspension strip (12). A plurality of electromagnets (17) are provided on the inner bottom of each strip-shaped connecting groove (11). The bottom of each hollow negative pressure suspension strip (12) is made of a metal material that can be magnetically attracted by the electromagnet (17). An exhaust hole (20) and an air inlet (21) penetrating the corresponding runway-shaped track (6) are provided inwardly at one end of the vacuum chamber (1); the exhaust hole (20) corresponds to the position of the strip-shaped feed port (14); the air inlet (21) corresponds to the position of the strip-shaped discharge port (15); a second vacuum pump (22) is provided at one end of the vacuum chamber (1); an exhaust pipe (23) is connected between the inlet end of the second vacuum pump (22) and the outer end of the exhaust hole (20); the outer end of the air inlet (21) is connected to a second vacuum solenoid valve (24); each One end of the strip-shaped connecting groove (11) is provided with a sealed vent hole (25) matching the exhaust hole (20) or the air inlet hole (21); one end of each hollow negative pressure suspension strip (12) is provided with an air inlet and outlet hole connected to the corresponding sealed vent hole (25); when the hollow negative pressure suspension strip (12) is located at the strip-shaped feed port (14), the sealed vent hole (25) is connected to the exhaust hole (20); when the hollow negative pressure suspension strip (12) is located at the strip-shaped discharge port (15), the sealed vent hole (25) is connected to the air inlet hole (21).

2. The coating device for medical rubber stopper according to claim 1, characterized in that: It also includes a feeding hopper (29) with an opening at the upper end, the lower end of the feeding hopper (29) is connected to a strip collecting trough (30), the bottom of the feeding hopper (29) is closed toward the strip collecting trough (30), the strip collecting trough (30) is provided with an output port (31) at one end facing the vacuum chamber (1), a negative pressure conveyor is arranged at the bottom of the strip collecting trough (30), one end of the negative pressure conveyor extends from the output port (31), and the negative pressure conveyor includes a first strip frame (32), a hollow negative pressure strip (33) arranged in the first strip frame (32), a negative pressure conveyor belt (34) disposed on the upper and lower sides of the hollow negative pressure strip (33), and a negative pressure conveying motor (35) for driving the negative pressure conveyor belt (34) to move; It also includes a third vacuum pump (36), the inlet end of the third vacuum pump (36) is connected to the hollow negative pressure strip (33) through a suction pipe (37), the upper end of the hollow negative pressure strip (33) in the strip collecting groove (30) is provided with a strip-shaped negative pressure hole (38) which is connected to the interior and arranged along the length direction of the hollow negative pressure strip (33), the negative pressure conveyor belt (34) is provided with a plurality of second negative pressure suction holes (39) distributed along the length direction of the hollow negative pressure strip (33), and the second negative pressure suction holes (39) are used to suck the crown of the rubber stopper; The vacuum chamber (1) is provided with two clamping conveyors arranged opposite to each other above the strip-shaped feed port (14), each clamping conveyor comprising a second strip frame (40), a clamping conveyor belt (41) movable in the second strip frame (40), and two transmission shafts (42) rotatably connected to the second strip frame (40) and located inside the two ends of the clamping conveyor belt (41), a clamping conveying motor (45) for driving the clamping conveyor belt (41) to move is installed on the outer side of the second strip frame (40), and each second strip frame (40) has an opening on one side opposite to the other, and the two conveyor belts are used to cooperate in clamping the skirt of the rubber stopper, and one end of each clamping conveyor extends to the upper end of the free end of the negative pressure conveyor, so as to clamp and transport the rubber stopper on the negative pressure conveyor.

3. The coating device for medical rubber stopper according to claim 2, characterized in that: A spacing adjustment turntable (47) is rotatably connected to the upper end of the portion of the negative pressure conveyor extending out of the output port (31), and a plurality of circumferentially distributed rubber plug snap-in openings (48) are provided on the outer circumference of the spacing adjustment turntable (47), and the shape of each rubber plug snap-in opening (48) matches the shape of the rubber plug. A spacing adjustment motor (49) for driving the spacing adjustment turntable (47) to rotate is installed on the outer side of the negative pressure conveyor.

4. The coating device for medical rubber stopper according to claim 2, characterized in that: Each second strip frame (40) is provided with an elastic sponge strip (43), and each clamping conveyor belt (41) is provided on the left and right sides of the corresponding elastic sponge body.

5. The coating device for medical rubber stopper according to claim 2, characterized in that: The clamping and conveying motor (45) is installed at one end of one of the second strip frames (40), and the power output shaft of the clamping and conveying motor (45) is connected to the transmission shaft (42) at the corresponding position, and one end of the root transmission shaft (42) close to the clamping and conveying motor (45) is connected to a transmission gear (46), and the two transmission gears (46) are meshed with each other.

6. A coating device for medicinal rubber stoppers according to any one of claims 1 to 5, characterized in that: The vacuum chamber (1) is provided with a discharge conveyor above the strip-shaped discharge port (15), the discharge conveyor comprising a third strip-shaped frame (50), a discharge conveyor belt (51) movable in the third strip-shaped frame (50), and a discharge conveyor motor (52) installed on the outside of the third strip-shaped frame (50) for driving the discharge conveyor belt (51) to move, the third strip-shaped frame (50) is open toward one side of the strip-shaped discharge port (15), the outside of the discharge conveyor belt (51) is provided with a plurality of push strips (53) distributed along its length direction, and one end of the discharge conveyor protrudes outward from the vacuum chamber (1).

7. The coating device for medical rubber stopper according to claim 1, characterized in that: The two runway-shaped transmission belts (7) are chains. Two drive shafts (8) are rotatably connected between the two runway-shaped tracks (6). The power output shaft of the drive motor (9) is connected to one of the drive shafts (8). Both ends of each drive shaft (8) are provided with a drive sprocket (10) meshing with the inner side of one end of the corresponding runway-shaped transmission belt (7).

8. The coating device for medical rubber stopper according to claim 1, characterized in that: A movable gap is reserved between one end of each hollow negative pressure suspension strip (12) close to the corresponding sealed vent hole (25) and the inner wall of the corresponding strip-shaped connecting groove (11); each inlet and outlet air hole is connected to the corresponding sealed vent hole (25) through a vent hose (27) in the corresponding movable gap; and a sealing cover plate (28) is provided at the outer end of each hollow negative pressure suspension strip (12) which is sealingly and slidably connected to the corresponding strip-shaped connecting groove (11) and is used to cover the corresponding vent hose (27).

9. The coating device for medical rubber stopper according to claim 1, characterized in that: A racetrack-shaped conductive slip ring (18) is arranged on the inner side of one of the racetrack-shaped tracks (6), a sliding brush (19) which is electrically connected to the racetrack-shaped conductive slip ring (18) in a sliding manner is arranged at one end of each strip-shaped connecting groove (11), and an electromagnet (17) in each strip-shaped connecting groove (11) is electrically connected to the sliding brush (19) on the outer side thereof.

10. The coating device for medical rubber stopper according to claim 1, characterized in that: The outer side of one end of each strip-shaped connecting groove (11) is provided with a rubber sealing ring (26) having a corresponding outer cover and a sealing vent hole (25).

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