A pneumatic pusher device for glue bottles

Abstract

The application relates to the technical field of tooling die manufacturing equipment, in particular to a rubber bottle pneumatic mold pushing device. The device comprises a cylinder body, the cylinder body is provided with a piston cavity arranged in the axial direction, and the front end of the cylinder body is provided with a butt joint groove matched with the extrusion end of the rubber bottle, the butt joint groove is in an open U-shaped structure; a clamping groove matched with the positioning edge of the rubber bottle is arranged on the side wall of the butt joint groove, and a guide hole communicated with the piston cavity is arranged at the bottom of the butt joint groove; a piston is slidably connected in the piston cavity, and the piston divides the piston cavity into a first chamber and a second chamber from front to back; a push rod is fixedly arranged at the front end of the piston and slidably connected in the guide hole; a pressure regulating unit is communicated with the first chamber or the second chamber through a pipeline and used for controlling the air pressure value in the first chamber or the second chamber. The rubber bottle can be replaced without disassembling the pressing block, the efficiency of rubber bottle replacement is improved, the device wear is reduced, the device structure is simple, the cost is low, and the device is more suitable for small and medium-sized production environments.

Description

Technical Field

[0001] This application relates to the field of tooling and mold making equipment, and in particular to a pneumatic ejector device for rubber bottles. Background Technology

[0002] In the field of dental impressions, filling impression materials into bottles is a crucial step, and the accuracy of this filling directly affects the quality of the impression. Elastomer impression materials are typically packaged in separate dental bottles. During filling, the stopper needs to be pushed into the bottle to expel air and ensure a tight fit between the stopper and the small end of the bottle. Currently, pneumatic glue guns are mainly used to push the stopper. Existing pneumatic glue guns primarily use threaded locking mechanisms, which secure the bottle via a rotating mechanism, but require complete disassembly of the clamping block when changing bottles. Spring-clamped pneumatic glue guns eliminate the threads but require manual opening of the clamp. While fully automated filling production lines achieve unmanned operation, the high equipment cost limits their application to large-scale processing plants.

[0003] The aforementioned technologies have drawbacks, such as cumbersome and time-consuming operation when changing glue bottles, and the high cost of some equipment makes them unsuitable for small and medium-sized production environments. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this application provides a pneumatic push mold device for plastic bottles, which can replace plastic bottles without disassembling the pressure block, improving the efficiency of plastic bottle replacement and reducing equipment wear. At the same time, the device has a simple structure and low cost, making it more suitable for small and medium-sized production environments.

[0005] This application is achieved through the following technical solution: A pneumatic extrusion device for a plastic bottle includes a cylinder body with a piston chamber arranged along the axial direction. The front end of the cylinder body is provided with a mating groove adapted to the extrusion end of the plastic bottle. The mating groove has an open U-shaped structure. The side wall of the mating groove is provided with a snap-fit ​​groove adapted to the positioning edge of the plastic bottle. The bottom of the mating groove is provided with a guide hole communicating with the piston chamber. The piston is slidably connected in the piston chamber, and the piston divides the piston chamber into a first chamber and a second chamber from front to back; The push rod is fixed to the front end of the piston and slidably connected in the guide hole; The pressure regulating unit is connected to the first chamber or the second chamber through a pipe and is used to control the air pressure value in the first chamber or the second chamber so as to drive the piston to move in the piston chamber.

[0006] By adopting the above technical solution, the extrusion end of the glue bottle is aligned with the docking groove at the front end of the cylinder. Utilizing the open U-shaped structure of the docking groove and the snap-fit ​​groove on the side wall, the glue bottle can be quickly and stably positioned and fixed onto the device. The pressure regulating unit controls the air pressure in the first or second chamber, causing the air pressure to act on the piston, pushing it forward or backward. This, in turn, drives the push rod to slide along the guide hole, completing the advancing or retracting action. During this process, the glue bottle can be easily removed, and a new glue bottle can be quickly inserted and fixed along the docking groove. The entire replacement process requires no disassembly of any parts, making operation simple and quick, greatly shortening replacement time and improving production efficiency. Furthermore, the device has a simple structural design, low cost, and is suitable for small and medium-scale production environments.

[0007] Optionally, the guide hole includes a first guide hole and a second guide hole, the diameters of which are adapted to the bottle stopper of the rubber bottle; the push rod includes a first push rod and a second push rod, the first push rod and the second push rod being adapted to the diameters of the first guide hole and the second guide hole respectively, and the rear ends of the first push rod and the second push rod being fixedly connected to the front end face of the piston.

[0008] By adopting the above technical solution, the diameters of the first guide hole and the second guide hole are matched with the bottle stopper of the glue bottle, so that the push rod always moves along the axis during the push process, avoiding deflection and shaking, thereby ensuring that the bottle stopper is subjected to uniform force and significantly improving filling accuracy; the first push rod and the second push rod are respectively adapted to the diameters of the first guide hole and the second guide hole and the rear end is fixedly connected to the piston, so that the push rod can slide more stably and accurately along the guide hole under the drive of the piston.

[0009] Optionally, a groove is provided on the inner wall of the guide hole, and a dustproof component is provided in the groove.

[0010] By adopting the above technical solution, a groove is set on the inner wall of the guide hole and a dustproof component is installed, which can effectively block external impurities from entering the piston chamber, reduce component wear and jamming caused by dust, thereby extending the service life of the device and improving the stability and reliability of operation.

[0011] Optionally, the front ends of the first push rod and the second push rod are provided with elastic buffer pads.

[0012] By adopting the above technical solution, the elastic buffer pads set at the front ends of the first and second push rods can effectively absorb the impact force when the push rods come into contact with the bottle stopper of the plastic bottle, reducing the damage or deformation of the bottle stopper caused by hard contact, thereby protecting the bottle stopper of the plastic bottle from damage and ensuring the accuracy and quality of the filling of the molding material.

[0013] Optionally, the bottom of the U-shaped docking groove has an arc-shaped structure.

[0014] By adopting the above technical solution, the bottom of the U-shaped docking groove has an arc-shaped structure, which can effectively reduce stress concentration and enhance the stability and durability of the structure.

[0015] Optionally, a flexible pad is provided above the snap-fit ​​groove.

[0016] By adopting the above technical solution, a flexible pad is provided above the snap-fit ​​groove. When changing to different sizes of plastic bottles, the flexible pad is compressed and quickly rebounds, which can automatically compensate for size differences and achieve stable clamping of different bottle diameters.

[0017] Optionally, a sealing groove is provided on the side wall where the piston abuts against the cylinder, and a sealing element is provided in the sealing groove.

[0018] By adopting the above technical solution, a sealing groove is provided on the side wall where the piston abuts the cylinder, and a sealing element is provided in the sealing groove, which further enhances the sealing performance of the piston cavity, effectively prevents gas from leaking from the gap between the piston and the cylinder during piston movement, ensures stable transmission of air pressure, and improves the accuracy and reliability of piston movement.

[0019] Optionally, an elastic reset element is provided on the front end face of the piston.

[0020] By adopting the above technical solution, the elastic reset component on the piston front end face can provide stable elastic support for the piston's return, ensuring that the piston can quickly and accurately return to the initial position after completing the push rod action, thereby improving the operating efficiency of the device.

[0021] Optionally, the opening end of the snap-fit ​​groove is provided with a bevel to guide the glue bottle smoothly into the snap-fit ​​groove.

[0022] By adopting the above technical solution, the chamfer at the opening end of the snap-fit ​​groove can form a guiding slope when the glue bottle is inserted, so that the edge of the bottle mouth can be automatically aligned and smoothly slide into the snap-fit ​​groove, thereby significantly reducing insertion resistance, reducing scratch damage, and improving the accuracy of glue bottle positioning and replacement efficiency.

[0023] Optionally, the pressure regulating unit includes a solenoid valve group, a compressed air pipe, and a vacuum pump. The solenoid valve group includes a first solenoid valve, a second solenoid valve, and a third solenoid valve. The outlet of the first solenoid valve is connected to the inlet of the vacuum pump through a pipe, and the inlet of the third solenoid valve is connected to the outlet of the vacuum pump through a pipe. The outlets of the second and third solenoid valves are connected to the first cavity through pipes. The inlet of the second solenoid valve is connected to the compressed air pipe.

[0024] By adopting the above technical solution, and by switching between the two circuits of compressed air pipe-second solenoid valve and first solenoid valve-vacuum pump-third solenoid valve, the positive or negative pressure in the first chamber can be switched quickly, thereby achieving precise control of the push rod's extension and retraction, and shortening the single action cycle.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The front end of the cylinder body of this application is provided with an open U-shaped docking groove and a snap-fit ​​groove on the side wall of the docking groove, which can quickly and stably position and fix the glue bottle on the device. When replacing the glue bottle, no parts need to be disassembled. The new glue bottle can be quickly inserted and fixed along the docking groove, which greatly shortens the glue bottle replacement time and makes the operation simple and quick. The bottom of the U-shaped docking groove has an arc-shaped structure, which reduces stress concentration and improves the stability and ease of operation of the overall device.

[0026] 2. The diameters of the first and second guide holes in this application are adapted to the bottle stopper of the glue bottle and the first and second push rods, ensuring that the push rod always moves along the axis during the push-up process, avoiding deflection and shaking; an elastic buffer pad is provided at the front end of the push rod, which can effectively absorb the impact force when the push rod contacts the bottle stopper of the glue bottle, avoiding damage or deformation of the bottle stopper due to hard contact; a flexible pad is provided above the snap-fit ​​groove, which compresses and quickly rebounds when changing glue bottles of different sizes, which can automatically compensate for size differences and achieve stable clamping of different bottle diameters; a seal is provided between the cylinder and the piston, which effectively prevents compressed air from leaking during piston movement, ensuring stable air pressure transmission, significantly improving filling accuracy, and ensuring the accuracy and quality of the molded material filling; an elastic reset element provided on the front end face of the piston can provide stable elastic support for the piston's return, ensuring that the piston can quickly and accurately return to the initial position after completing the push rod action, improving the operating efficiency of the device.

[0027] 3. This application enables rapid switching between positive and negative pressure in the first chamber by switching between two circuits: compressed air pipe-second solenoid valve and first solenoid valve-vacuum pump-third solenoid valve. This allows the piston to reciprocate quickly and accurately within the piston chamber, improving the operating efficiency of the device. It is particularly suitable for production environments requiring frequent operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the pneumatic push-molding device for glue bottles described in Embodiment 1; Figure 2 This is a cross-sectional view of the cylinder block described in Embodiment 1; Figure 3 This is a schematic diagram of the voltage regulating unit described in Embodiment 1; Figure 4 This is a schematic diagram of the bevel angle described in Embodiment 2; Figure 5 This is a schematic diagram of the elastic reset component described in Embodiment 2; Figure 6 This is a schematic diagram of the flexible pad described in Example 3.

[0029] In the diagram: 1. Cylinder block; 11. Piston chamber; 111. First chamber; 112. Second chamber; 12. Connecting groove; 121. Snap-fit ​​groove; 1211. Chamfer; 1212. Flexible pad; 13. Guide hole; 131. First guide hole; 132. Second guide hole; 133. Groove; 14. Sealing groove; 15. Dustproof pad; 2. Piston; 21. Seal; 22. Elastic reset element; 3. Push rod; 31. First push rod; 32. Second push rod; 33. Elastic buffer pad; 4. Pressure regulating plate 41. Solenoid valve assembly; 411. First solenoid valve; 4111. First solenoid valve outlet; 4112. First solenoid valve inlet; 412. Second solenoid valve; 4121. Second solenoid valve outlet; 4122. Second solenoid valve inlet; 413. Third solenoid valve; 4131. Third solenoid valve outlet; 4132. Third solenoid valve inlet; 42. Vacuum pump; 421. Vacuum pump outlet; 422. Vacuum pump inlet; 43. Controller; 44. Compressed air pipe. Detailed Implementation

[0030] The technical solutions of various embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] Example 1 Reference Figure 1 and Figure 2 This application discloses a pneumatic ejector device for plastic bottles, comprising: The cylinder body 1 has a piston chamber 11 arranged along the axial direction, and the front end of the cylinder body 1 is provided with a docking groove 12 adapted to the extrusion end of the glue bottle. The docking groove 12 has an open U-shaped structure. The side wall of the docking groove 12 is provided with a snap-fit ​​groove 121 adapted to the positioning edge of the glue bottle, and the bottom of the docking groove 12 is provided with a guide hole 13 communicating with the piston chamber 11. Piston 2 is slidably connected in piston chamber 11, and piston 2 divides piston chamber 11 from front to back into first chamber 111 and second chamber 112. Push rod 3 is fixed to the front end of piston 2 and slidably connected in guide hole 13; The pressure regulating unit 4 is connected to the first chamber 111 via a pipe and is used to control the air pressure value in the first chamber 111 so as to drive the piston 2 to move in the piston chamber 11. It should be noted that the pressure regulating unit 4 can also be connected to the second chamber 112 to control the air pressure value in the second chamber 112 so as to drive the piston 2 to move in the piston chamber 11.

[0032] Specifically, refer to Figure 2The cylinder body 1 is made of one piece of aluminum alloy, and has an axially extending cylindrical piston cavity 11 machined inside. The piston cavity 11 is 20-100mm long. The front end of the cylinder body 1 is milled to form an open U-shaped docking groove 12, the bottom of which has an arc-shaped structure. The groove is 50-150mm long and 15-60mm wide, and the groove width is tightly fitted to the outer diameter of the extrusion end of the glue bottle. A rectangular snap-fit ​​groove 121 is milled on each of the left and right side walls of the U-shaped docking groove 12, and the snap-fit ​​groove 121 is 1-5mm deep. mm, which fits tightly with the positioning edge of the glue bottle; the bottom of the docking groove 12 is provided with two guide holes 13 that are adapted to the bottle stopper of the glue bottle, wherein the guide hole 13 includes a first guide hole 131 and a second guide hole 132, and the inner wall of the guide hole 13 is provided with a groove 133 and a dustproof component is installed. The diameter of the first guide hole 131 and the second guide hole 132 is 10-50 mm, and the dustproof component is made of sponge material, has a ring structure, and has a diameter of 8-50 mm.

[0033] Align the extrusion end of the glue bottle with the opening of the U-shaped docking groove 12, and align the positioning edge of the glue bottle with the snap-fit ​​groove 121. Slide the positioning edge and extrusion end of the glue bottle horizontally along the first side wall, the second side wall and the snap-fit ​​groove 121. Continue to push forward until the extrusion end of the glue bottle is stopped by the limiting base. At this time, the bottle stopper is coaxial with the guide hole 13, and the quick installation is completed.

[0034] Specifically, refer to Figure 2 The piston 2 is slidably connected in the piston chamber 11. The piston 2 is disc-shaped, with a diameter of 10-50 mm and a thickness of 3-10 mm. The piston 2 divides the piston chamber 11 into a first chamber 111 and a second chamber 112 from front to back. The push rod 3 includes a first push rod 31 and a second push rod 32. The rear ends of the first push rod 31 and the second push rod 32 are fixedly connected to the front end face of the piston 2 by threads. The front ends extend into the corresponding guide hole 13. To reduce damage to the end face of the bottle stopper, the first push rod 31... Both the first push rod 31 and the second push rod 32 are provided with elastic buffer pads 33 at their front ends. The lengths of the first push rod 31 and the second push rod 32 are the same as the length of the bottle body, both being 80-200mm. The first push rod 31 and the second push rod 32 are adapted to the first guide hole 131 and the second guide hole 132, both having a diameter of 10-50mm. The elastic buffer pads 33 are made of silicone. A sealing element 21 is provided between the piston 2 and the cylinder 1. The sealing element 21 is made of rubber and has a diameter of 10-50mm.

[0035] Specifically, refer to Figure 2 and Figure 3The pressure regulating unit 4 includes a solenoid valve group 41, a compressed air pipe 44, and a vacuum pump 42. The solenoid valve group 41 includes a first solenoid valve 411, a second solenoid valve 412, and a third solenoid valve 413. The outlet 4111 of the first solenoid valve is connected to the inlet 422 of the vacuum pump through a pipe. The inlet 4132 of the third solenoid valve is connected to the outlet 421 of the vacuum pump through a pipe. The outlets 4121 and 4131 of the second and third solenoid valves are connected to the first chamber 111 through a pipe. The inlet of the second solenoid valve 412 is connected to the compressed air pipe 44. The first solenoid valve 411, the second solenoid valve 412, the third solenoid valve 413, and the vacuum pump 42 are electrically connected to the control unit of the device.

[0036] When adhesive is needed, the control unit de-energizes the first solenoid valve 411 and the third solenoid valve 413, closing the air path. The second solenoid valve 412 opens, allowing high-pressure air from the compressed air pipe 44 to enter the first chamber 111 via the second solenoid valve 412. The piston 2 moves forward, pushing out the first push rod 31 and the second push rod 32, thus pushing the extrusion block in the adhesive bottle to squeeze the adhesive out of the bottle. When the adhesive bottle needs to be removed, the control unit de-energizes the second solenoid valve 412, closing the air path. Simultaneously, the first solenoid valve 411 and the third solenoid valve 413 open, allowing the vacuum pump 42 to draw gas from the first chamber 111 via the third solenoid valve 413, creating a negative pressure. The vacuum pump 42 then discharges the drawn gas through the third solenoid valve 413 to the pressure regulating unit 4. The first push rod 31 and the second push rod 32 retract, allowing the adhesive bottle to be removed and replaced with a new one.

[0037] The implementation principle of this embodiment is as follows: The front end of the cylinder 1 is provided with an open U-shaped docking groove 12 and a snap-fit ​​groove 121 on the side wall of the docking groove 12, which can quickly and stably position and fix the glue bottle on the device. When replacing the glue bottle, no parts need to be disassembled. The new glue bottle can be quickly inserted and fixed along the docking groove 12, which greatly shortens the glue bottle replacement time and makes the operation simple and quick. In addition, the device can quickly switch between positive and negative pressure in the first chamber 111 by controlling the solenoid valve, so that the piston 2 can quickly and accurately reciprocate in the piston chamber 11, which improves the operating efficiency of the device and is particularly suitable for production environments that require frequent operation.

[0038] Example 2 Reference Figures 3 to 5The difference between this embodiment and embodiment one is that an elastic reset member 22 is snapped onto the front end face of piston 2. The elastic reset member 22 is a spring. The compressed air pipe 44 is connected to the air inlet of the second solenoid valve 412. The air outlet of the second solenoid valve 412 is connected to the first chamber 111 through a pipeline. The opening end of the snap-fit ​​groove 121 on the side wall of the U-shaped docking groove 12 is provided with a guide angle 1211. Specifically, the elastic reset member 22 snapped onto the front end face of piston 2 can provide stable elastic support for the return of piston 2, ensuring that piston 2 can quickly and accurately return to the initial position after completing the push rod 3 action. The guide angle 1211 provided at the opening end of the snap-fit ​​groove 121 can form a guiding slope when the glue bottle is inserted, and the positioning edge of the glue bottle can be aligned and smoothly slide into the snap-fit ​​groove 121.

[0039] The implementation principle of this embodiment is as follows: A chamfer 1211 is added to the front end of the snap-fit ​​groove 121 on the side wall of the U-shaped docking groove 12 to form a guiding slope. When the positioning edge of the glue bottle slides horizontally into the snap-fit ​​groove 121, the chamfer 1211 first contacts the edge and generates a guiding force, so that the positioning edge of the glue bottle smoothly transitions into the snap-fit ​​groove 121, avoiding direct impact from sharp edges that could cause scratches or jamming, thus achieving faster and safer glue bottle replacement; when a negative pressure is formed in the first chamber 111, the piston 2 moves backward, and the first push rod 31 and the second push rod 32 retract accordingly. At this time, the piston... 2. The spring at the front end is stretched and stores elastic potential energy. When the first solenoid valve 411 and the third solenoid valve 413 are de-energized and the second solenoid valve 412 is opened, the high-pressure air in the compressed air pipe 44 enters the first chamber 111 through the second solenoid valve 412. The piston 2 moves forward, and at the same time the spring releases elastic potential energy to assist the piston 2 to return to its original position quickly. The first push rod 31 and the second push rod 32 are pushed out. The elastic potential energy of the spring is used to assist the piston 2 to return to its original position quickly, which can provide a buffering effect, reduce the impact force when returning to its original position, and improve the operating stability and service life of the device.

[0040] Example 3 Reference Figure 6 The difference between this embodiment and embodiment one is that a flexible pad 1212 is provided above the snap-fit ​​groove 121. Specifically, the flexible pad 1212 is a silicone strip with an inverted U-shaped cross section. A compression allowance of 1mm to 5mm is formed between the silicone strip and the top surface of the snap-fit ​​groove 121. When the positioning edge of a plastic bottle of different sizes is pushed into the snap-fit ​​groove 121, the silicone strip is pressed and elastically deformed, which can automatically compensate for the size difference, realize the stable clamping of different bottle diameters, and at the same time prevent hard collisions.

[0041] The implementation principle of this embodiment is as follows: when different sized plastic bottles are pushed into the docking groove 12, their positioning edges contact and squeeze the flexible pad 1212. The flexible pad 1212 is compressed and quickly rebounds, automatically compensating for size differences, achieving stable clamping of different bottle diameters while preventing hard collisions.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this application.

Claims

1. A pneumatic pusher device for pushing a glue bottle, characterized in that, include: The cylinder (1) has a piston chamber (11) arranged along the axial direction, and the front end of the cylinder (1) is provided with a docking groove (12) adapted to the extrusion end of the glue bottle. The docking groove (12) has an open U-shaped structure. The side wall of the docking groove (12) is provided with a snap-fit ​​groove (121) adapted to the positioning edge of the glue bottle, and the bottom of the docking groove (12) is provided with a guide hole (13) communicating with the piston chamber (11). The piston (2) is slidably connected in the piston chamber (11), and the piston (2) divides the piston chamber (11) into a first chamber (111) and a second chamber (112) from front to back. The push rod (3) is fixed at the front end of the piston (2) and slidably connected in the guide hole (13); The pressure regulating unit (4) is connected to the first chamber (111) or the second chamber (112) through a pipe, and is used to control the air pressure value in the first chamber (111) or the second chamber (112) to drive the piston (2) to move in the piston chamber (11).

2. A device for pneumatically pushing a mold away from a glue bottle according to claim 1, characterized in that The guide hole (13) includes a first guide hole (131) and a second guide hole (132), the diameters of the first guide hole (131) and the second guide hole (132) are adapted to the bottle stopper of the rubber bottle; the push rod (3) includes a first push rod (31) and a second push rod (32), the first push rod (31) and the second push rod (32) are adapted to the diameters of the first guide hole (131) and the second guide hole (132) respectively, and the rear ends of the first push rod (31) and the second push rod (32) are fixedly connected to the front end face of the piston (2).

3. The pneumatic ejector device for a glue bottle according to claim 2, characterized in that, The inner wall of the guide hole (13) is provided with a groove (133), and a dustproof component is provided in the groove (133).

4. The pneumatic ejector device for a plastic bottle according to claim 2, characterized in that, The first push rod (31) and the second push rod (32) are provided with elastic buffer pads (33) at their front ends.

5. The pneumatic ejector device for a glue bottle according to claim 1, characterized in that, The bottom of the U-shaped docking groove (12) has an arc-shaped structure.

6. The pneumatic ejector device for a rubber bottle according to claim 1, characterized in that, A flexible pad (1212) is provided above the snap-fit ​​groove (121).

7. The pneumatic ejector device for rubber bottles according to claim 1, characterized in that, The piston (2) has a sealing groove (14) on the side wall that abuts against the cylinder (1), and a sealing element (21) is provided in the sealing groove (14).

8. A pneumatic ejector device for rubber bottles according to claim 5, characterized in that, An elastic reset element (22) is provided on the front end surface of the piston (2).

9. A pneumatic ejector device for rubber bottles according to claim 1, characterized in that, The opening end of the snap-fit ​​groove (121) is provided with a bevel (1211) to guide the glue bottle smoothly into the snap-fit ​​groove (121).

10. A pneumatic ejector device for rubber bottles according to claim 1, characterized in that, The pressure regulating unit (4) includes a solenoid valve group (41), a compressed air pipe (44), and a vacuum pump (42). The solenoid valve group (41) includes a first solenoid valve (411), a second solenoid valve (412), and a third solenoid valve (413). The outlet of the first solenoid valve (4111) is connected to the inlet of the vacuum pump through a pipe. The inlet of the third solenoid valve (4132) is connected to the outlet of the vacuum pump through a pipe. The outlets of the second and third solenoid valves (4121 and 4131) are connected to the first chamber (111) through pipes. The inlet of the second solenoid valve (4122) is connected to the compressed air pipe (44).

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