Rotary multi-station bottle cap injection mold

Abstract

The application discloses a rotary multi-station bottle cap injection mold applied to the field of plastic injection, wherein a round pipe part at the corner of a rotating block is used to drive the round pipe part to move synchronously when a movable mold part is switched, so that hot air sweeping and drying are performed on the surface of a static mold part, condensate water generated on the surface of the static mold part due to temperature difference is effectively eliminated, and the injection quality after mold closing is ensured; meanwhile, the hot air is introduced into a preheating cavity in the movable mold part which is about to be switched and closed through a recovery cavity and a reflux pipe, waste heat recycling is realized, the movable mold part which is about to work is preheated, energy loss caused by cold and hot shock is reduced, and the double functions of static mold part surface drying and energy-saving preheating are taken into account, and through the cleaning assembly arranged at the tail end of the feeding pipe and the cooperation of the sharp block, efficient and stable removal of the cold material plug is realized.

Description

Technical Field

[0001] This invention relates to the field of plastic injection molding, and in particular to a rotary multi-station bottle cap injection mold. Background Technology

[0002] Injection molds are the core molding tools in bottle cap production. Through their precise cavity structure, they impart specific geometric shapes and dimensional accuracy to the molten plastic, determining the sealing performance and appearance quality of the bottle cap. Simultaneously, the integrated cooling system within the mold regulates the crystallization and shrinkage processes of the plastic, ensuring the stability of the product's physical and mechanical properties.

[0003] The prior art CN202311349908.9 discloses a rapid cooling bottle cap injection mold, which solves the problem that injection molds usually use water cooling to rapidly cool plastic bottle caps. However, the cooling water needs to be replaced multiple times during the cooling process to ensure the cooling effect, which not only increases the number of operation steps for workers and consumes manpower, but also wastes water resources.

[0004] The prior art CN202510021354.2 discloses a plastic bottle cap injection molding die, which can perform two cooling and solidification methods on the plastic bottle cap inside the molding die sleeve when it is necessary to quickly solidify the plastic melt injected into the moving mold, thereby improving the solidification efficiency and solidification effect of the plastic bottle cap.

[0005] In the aforementioned prior art, during the injection molding of bottle caps, the moving mold and the stationary mold are always in a closed state, and cooling and shaping are carried out using cooling pipes within the injection mold. However, this single operation results in the stationary mold waiting time throughout the entire injection molding process. By utilizing a rotary multi-station operation, the stationary mold can detach from the moving mold after it has closed with the first moving mold and the product has been initially shaped on the core surface. Then, the second moving mold can close with the stationary mold to continue the injection and initial shaping operations. During this process, the surface of the first moving mold continues to undergo further cooling, thus improving injection molding efficiency. While improving injection molding efficiency using a rotary multi-station injection structure, the surface of the stationary mold experiences frequent hot and cold switching, which can easily lead to condensation and affect the processing quality of the injection mold. Summary of the Invention

[0006] The core of this invention lies in the use of a circular tube at the corner of the rotating block. During the switching of the moving mold part, the circular tube moves synchronously, thereby sweeping and drying the surface of the stationary mold part with hot air. This effectively eliminates condensation caused by temperature differences on the surface of the stationary mold part, ensuring the injection molding quality after mold closing and solving the problem of condensation on the surface of the stationary mold that easily affects injection molding quality in existing technologies. Simultaneously, a cleaning component with a pointed block is installed at the tail end of the feed tube to achieve efficient and stable removal of cold slug plugs.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A rotary multi-station bottle cap injection mold includes an injection table. A feeding pipe and a hydraulic telescopic rod located on one side of the feeding pipe are respectively mounted on the top of the injection table via a support. A raw material cylinder is installed through the top of the feeding pipe, and a stationary mold component is connected through the tail end of the feeding pipe. A movable frame is connected to the power end of the hydraulic telescopic rod, and a rotating pipe is connected to the top of the movable frame. A rotating block is fixedly sleeved on the surface of the rotating pipe. Circular tubes are fitted at the four corners of the rotating block, and vent pipes are arranged on the surface of the circular tubes. The rotating block has an electric actuator two that corresponds to the round tube. The power end of the electric actuator two is connected to the surface of the round tube. The round tube has a heat insulation tube with built-in heating wire installed inside. The heat insulation tube and the inner wall of the round tube form a recovery cavity. The tail ends of the recovery tube and the exhaust tube extend into the recovery cavity and the heat insulation tube, respectively. The four surfaces of the rotating block are inlaid with moving molds. The moving molds have a preheating cavity inside. The top of the recovery cavity is equipped with a return pipe whose tail end extends into the preheating cavity.

[0009] Furthermore, multiple cooling slots are provided on the side surface of the movable frame near the rotating block, and an air pump is installed on the top of the movable frame. The output end of the air pump is connected to two hoses, and the tail ends of the two hoses extend into the cooling slots and the interior of the rotating tube, respectively.

[0010] Furthermore, a rectangular groove is provided on the top of the rotating block, and the bottom of the rotating tube is connected to the bottom wall of the rectangular groove. An air pump is installed inside the rectangular groove on one side of the rotating tube, and the output end of the air pump is connected to a discharge pipe extending to the top of the rotating block. The input end of the air pump is connected to a gas collecting pipe whose surface is connected to the tail ends of multiple return pipes.

[0011] Furthermore, a drive motor is installed on the top of the mobile frame, and the output end of the drive motor is connected to the surface of the rotating tube via a conveyor belt. The rotating tube and the heat insulation tube are connected through an air supply pipe.

[0012] Furthermore, an L-shaped bracket is mounted on the surface of the injection molding station, and an electric actuator is mounted on the surface of the bracket. The power end of the electric actuator is connected to a cooling mold identical to that of the stationary mold part.

[0013] Furthermore, the preheating chamber is internally connected to a tailpipe, and the tail end of the tailpipe extends to one side of the moving mold. A waterproof and breathable plate is installed inside the preheating chamber, and a filter screen is installed on the surface of the waterproof and breathable plate near the return pipe.

[0014] Optionally, a cleaning assembly is arranged at the tail end of the feeding pipe. The cleaning assembly includes a first pipe connected to the tail end of the feeding pipe, a limit block connected to the surface of the first pipe, a second pipe that is fixedly connected to the stationary mold part and is slidably sleeved on the surface of the first pipe, and a groove matching the limit block is opened on the inner wall of the second pipe. An electric push rod three is connected to the surface of the tail end of the feeding pipe, and the power end of the electric push rod three is connected to the surface of the stationary mold part.

[0015] Furthermore, both pipe No. 1 and pipe No. 2 are made of heat insulation material, and the inner walls of both pipe No. 1 and pipe No. 2 are coated with a high-temperature resistant and non-stick coating. The surface of the round pipe fitting is equipped with a pointed block with an air outlet at the end through a bracket at the position corresponding to pipe No. 2. The pointed block and the heat insulation pipe are connected through an air pipe. The inside of pipe No. 2 is equipped with a heat insulation block with the same diameter as the inner diameter of pipe No. 1 through a bracket.

[0016] Compared with the prior art, the advantages of this invention are:

[0017] (1) This solution uses a round tube at the corner of the rotating block to drive the round tube to move synchronously when the moving mold is switched, thereby sweeping and drying the surface of the stationary mold with hot air, effectively eliminating the condensation water on the surface of the stationary mold caused by temperature difference, ensuring the injection quality after mold closing. At the same time, the hot air is introduced into the preheating cavity in the moving mold that is about to be switched and closed through the recovery cavity and return pipe, realizing the recycling of waste heat, preheating the moving mold that is about to work, reducing the energy loss caused by the hot and cold collision, and taking into account the dual functions of drying the surface of the stationary mold and energy-saving preheating.

[0018] (2) In this solution, a cleaning component is set at the end of the feeding pipe and a sharp block is used. The static mold part is moved backward by the electric push rod three, which drives the No. 2 pipe to move backward, so that the cold material plug located in the No. 2 pipe is exposed. Then, the sharp block on the surface of the round pipe is used to accurately pick up and bring out the cold material plug. This can not only clean the cold material plug, but also avoid the problem of wire residue in traditional impact cleaning. At the same time, the heat insulation block blocks the pipe simultaneously to prevent the molten material from overflowing. After the replacement is successful, the air pipe is used to blow air to drive the cold material plug away from the surface of the sharp block. In the above process, the round pipe and the sharp block on the surface will not scrape against the static mold part, which protects the surface of the static mold part and achieves efficient and stable removal of the cold material plug. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the feeding pipe, stationary mold part, and cooling tank of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the rectangular groove at the top of the rotating block according to the present invention;

[0022] Figure 4 This is a top view of the circular tube component of the present invention.

[0023] Figure 5 This is a schematic diagram of the preheating cavity inside the rotating block of the present invention;

[0024] Figure 6 This is a schematic diagram showing how the circular tube component, in conjunction with the electric actuator two, sweeps and dries the surface of the stationary mold component when the rotating block of the present invention rotates;

[0025] Figure 7 This is a schematic diagram of the structure of the pointed block, the air tube, and the round tube component of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the electric actuator three, tube one, tube two and the heat insulation block of the present invention;

[0027] Figure 9 This is a schematic diagram showing the state of the cold slug protruding from the surface of the stationary mold part according to the present invention;

[0028] Figure 10 This is a schematic diagram showing the state in which the cold material plug, which is embedded in the surface of the pointed block, detaches from the surface of the pointed block under the impact of airflow after ventilation.

[0029] Figure 11 This is a schematic diagram showing the state where the cold plug consolidation area of ​​the present invention crosses the heat insulation block.

[0030] Explanation of the labels in the diagram:

[0031] 1. Injection molding table; 101. Cooling mold; 102. Electric ejector rod one; 2. Raw material cylinder; 3. Feed pipe; 4. Stationary mold part; 5. Hydraulic telescopic rod; 6. Moving frame; 601. Cooling tank; 7. Rotating block; 701. Discharge pipe; 702. Air pump one; 8. Moving mold part; 81. Moving mold one; 82. Moving mold two; 83. Moving mold three; 84. Moving mold four; 9. Air pump two; 10. Drive motor; 11. Round pipe fitting; 1101. Recovery chamber; 1102. Insulation pipe; 1103. Gas outlet pipe; 1104. Recovery pipe; 12. Rotating pipe; 13. Electric actuator two; 14. Gas supply pipe; 15. Return pipe; 16. Preheating chamber; 17. Pipe No. 1; 18. Pipe No. 2; 19. Electric actuator three; 20. Conical block; 21. Insulation plug; 22. Flexible hose; 23. Gas pipe; 24. Cold pack plug. Detailed Implementation

[0032] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0033] Example 1:

[0034] Please see Figures 1-4A rotary multi-station bottle cap injection mold includes an injection table 1. A feeding pipe 3 and a hydraulic telescopic rod 5 located on one side of the feeding pipe 3 are respectively mounted on the top of the injection table 1 via a support. A raw material cylinder 2 is installed through the top of the feeding pipe 3, and a stationary mold component 4 is connected through the tail end of the feeding pipe 3. A movable frame 6 is connected to the power end of the hydraulic telescopic rod 5. A rotating pipe 12 is connected to the top of the movable frame 6. A rotating block 7 is fixedly sleeved on the surface of the rotating pipe 12. Circular tubes 11 are fitted at the four corners of the rotating block 7. An exhaust pipe 1103 and a recovery pipe 1104 are arranged on the surface of the circular tubes 11. The interior of the rotating block 7... Electric actuators 13, each corresponding to a circular tube 11, are installed. The power end of the electric actuator 13 is connected to the surface of the circular tube 11. A heat insulation tube 1102 with a built-in heating wire is installed inside the circular tube 11. The heat insulation tube 1102 and the inner wall of the circular tube 11 form a recovery chamber 1101. The tail ends of the recovery tube 1104 and the air outlet tube 1103 extend into the recovery chamber 1101 and the heat insulation tube 1102, respectively. Moving molds 8 are embedded on all four surfaces of the rotating block 7. A preheating chamber 16 is opened inside the moving mold 8. A return pipe 15 with its tail end extending into the preheating chamber 16 is installed on the top of the recovery chamber 1101.

[0035] Please see Figure 2 Multiple cooling slots 601 are provided on the side surface of the movable frame 6 near the rotating block 7. An air pump 2 9 is installed on the top of the movable frame 6. Two hoses 22 are connected to the output end of the air pump 2 9, and the tail ends of the two hoses 22 extend into the cooling slots 601 and the rotating pipe 12, respectively.

[0036] Please see Figure 3 The top of the rotating block 7 is provided with a rectangular groove, and the bottom of the rotating tube 12 is connected to the bottom wall of the rectangular groove. An air pump 702 located on one side of the rotating tube 12 is installed inside the rectangular groove, and the output end of the air pump 702 is connected to a discharge pipe 701 extending to the top of the rotating block 7. The input end of the air pump 702 is connected to a gas collecting pipe whose surface is connected to the tail end of multiple return pipes 15.

[0037] Please see Figures 1-2 A drive motor 10 is installed on the top of the mobile frame 6, and the output end of the drive motor 10 is connected to the surface of the rotating tube 12 via a conveyor belt. The rotating tube 12 and the heat insulation tube 1102 are connected through the air supply pipe 14.

[0038] Please see Figure 5 The preheating chamber 16 is connected to a tail pipe, and the tail end of the tail pipe extends to one side of the moving mold 8. A waterproof and breathable plate (not labeled in the figure) is installed inside the preheating chamber 16, and a filter screen is installed on the surface of the waterproof and breathable plate near the return pipe 15.

[0039] For details, please refer to Figure 6The moving mold parts 8 around the rotating block 7 are marked as moving mold one 81, moving mold two 82, moving mold three 83 and moving mold four 84 respectively. During operation, the hydraulic telescopic rod 5 is used to move the moving frame 6 to the position of the stationary mold part 4, so that the moving mold one 81 on the surface of the rotating block 7 and the stationary mold part 4 form a mold closing process. Then, the plastic particles in the raw material cylinder 2 are heated and transferred to the interior of the stationary mold part 4 by the feeding pipe 3 for corresponding injection molding, pressure holding and preliminary shaping (the injection molded product surface on the core surface of the moving mold one 81 is shaped, but the molten material inside has not been completely cooled and solidified, and further cooling and solidification processing is required).

[0040] After the initial shaping is completed, the hydraulic telescopic rod 5 drives the moving frame 6 to move away from the stationary mold part 4. At the same time, the drive motor 10 starts, indirectly driving the rotating tube 12 and the rotating block 7 to rotate, so as to switch the moving mold 1 81 to the position of the moving mold 2 82. During this process, the round tube 11 at the corner between the moving mold 2 82 and the moving mold 1 81 moves accordingly. The air pump 2 9 is started, so that the air pump 2 9 delivers air into the interior of the rotating tube 12 through the hose 22, and transfers the airflow to the heat insulation tube 1102 (the outer surface is coated with a heat insulation coating and the interior is equipped with heating wires) through the air delivery pipe 14 that is connected to the rotating tube 12 and the round tube 11. After being heated inside the heat insulation tube 1102, the airflow is discharged through the air outlet pipe 1103.

[0041] During the rotation of the circular tube 11 following the rotating block 7, the circular tube 11 can perform an arc-shaped sweeping treatment on the surface of the stationary mold part 4. After the stationary mold part 4 separates from the surface of the moving mold 1 81 and re-closes with the surface of the moving mold 2 82, the surface temperature of the stationary mold part 4 is lower than the ambient temperature of the mold workshop (because it needs to cool and initially shape the molten material on the surface of the moving mold 1 81, hence the surface temperature is lower than the workshop ambient temperature). Condensation is likely to form on the surface. To address this potential condensation, the hot air blown out by the circular tube 11 during sweeping is used to dry the surface of the stationary mold part 4. Since the distance between the circular tube 11 and the surface of the stationary mold part 4 dynamically changes during the rotation and switching of the rotating block 7, the circular tube 11 can be extended with the assistance of the electric push rod 2 13 (e.g., Figure 6 As shown in the figure, the distance between the circular tube 11 and the surface of the stationary mold 4 is kept relatively stable to ensure the consistency of the drying effect.

[0042] During the sweeping and drying operation of the round tube 11, the air pump 702 is started with a delay to drive the hot air blown from the surface of the round tube 11 for delayed recovery. The hot air is then returned to the recovery chamber 1101 through the recovery pipe 1104 and then transferred to the preheating chamber 16 of the moving mold 82 through the return pipe 15 for preheating treatment of the moving mold 82 (the recovered hot air can be filtered and dried using a high-temperature resistant waterproof and breathable plate and filter screen, and the intercepted liquid water can be discharged through the drain pipe installed in the preheating chamber 16). The recovered hot air is then discharged from the interior of the preheating chamber 16 through the tail pipe to avoid excessive accumulation of hot air inside the preheating chamber 16. In addition, the hot air blown from the round tube 11 during sweeping can also be used to preheat the surface of the stationary mold 4, simultaneously achieving preheating treatment of the surface of the stationary mold 4 and the moving mold 8 that is about to be closed. This achieves both control of condensate and simultaneous preheating operation, ensuring injection molding quality and injection molding cost.

[0043] Please see Figures 1-2 An L-shaped bracket is mounted on the surface of the injection molding table 1. An electric actuator 102 is mounted on the surface of the bracket. The power end of the electric actuator 102 is connected to a cooling mold 101 that is the same as that of the stationary mold part 4.

[0044] Specifically, after the moving mold 2 82 and the stationary mold part 4 are closed, the moving mold 1 81 is switched to the position corresponding to the cooling mold 101. The electric push rod 102 assists the cooling mold 101 and the moving mold 1 81 in closing the mold and performing a deep cooling operation. After the moving mold 2 82 is initially shaped, it is switched to the position corresponding to the cooling mold 101. The moving mold 1 81 is switched to the position corresponding to the cooling tank 601 to continue to receive air cooling and cooling operation, so that the cooling and shaping are more thorough. When the moving mold 1 81 is switched to the position opposite the cooling mold 101, the bottle cap on the core surface of the moving mold 1 81 is ejected, and the corresponding injection molding operation is completed.

[0045] Example 2:

[0046] Please see Figures 7-8 The tail end of the feeding pipe 3 is provided with a cleaning component. The cleaning component includes a first pipe 17 connected to the tail end of the feeding pipe 3. A limit block is connected to the surface of the first pipe 17. A second pipe 18, which is fixedly connected to the stationary mold part 4, is slidably sleeved on the surface of the first pipe 17. The inner wall of the second pipe 18 is provided with a sliding groove that matches the limit block. An electric push rod 3 19 is connected to the surface of the tail end of the feeding pipe 3. The power end of the electric push rod 3 19 is connected to the surface of the stationary mold part 4.

[0047] Both pipe 17 and pipe 18 are made of heat insulation material, and the inner walls of both pipe 17 and pipe 18 are coated with a high-temperature resistant and non-stick coating. The surface of the round pipe fitting 11 is equipped with a pointed block 20 with an air outlet at the end, which is installed by a bracket at the position corresponding to pipe 18. The pointed block 20 and the heat insulation pipe 1102 are connected by an air pipe 23. The inside of pipe 18 is equipped with a heat insulation block 21 with the same diameter as the inner diameter of pipe 17, which is installed by a bracket.

[0048] Specifically, based on embodiment 1, when the round tube 11 is used to perform hot air sweeping operation on the surface of the stationary mold part 4, it works in conjunction with the cleaning component to clean the small amount of cold material plugs 24 generated at the end of the feed pipe 3 due to the preliminary shaping and cooling operation. In this embodiment, a control valve is installed on the surface of the air pipe 23 to assist in removing the cold material plugs 24 from the surface of the pointed block 20 after the moving mold part 8 is successfully repositioned.

[0049] Please see Figure 9 and Figure 10 (exist Figures 9-11 In the diagram, the density of the shaded areas within pipes 17 and 18 gradually increases, indicating that the degree of material solidification gradually increases within these pipes. The area with the highest density is where the cold material plug 24 is located. When the rotating block 7 retracts following the hydraulic telescopic rod 5 and begins to rotate and change position under the drive of the drive motor 10, the electric push rod 19 is activated, causing pipe 18 and the stationary mold part 4 to move away from the rotating block 7. This allows the cold material plug 24 remaining in the pipes to be exposed on the surface of the stationary mold part 4 (because the inner walls of pipes 17 and 18 are coated with anti-stick components, even if a small amount of cold material plug 24 is generated during the initial shaping process of the residual molten material, it will not stick to the inner walls of pipes 17 and 18). (It forms an adhesive, allowing it to be exposed smoothly). Then, when the round tube 11 sweeps, the sharp block 20 on its surface can penetrate into the exposed cold material plug 24, and then drive the cold material plug 24 away from the inside of the pipe. Compared with the impact effect of sweeping with the round tube 11, this method is more reliable. Therefore, the end of the cold material plug 24 and the molten material in the pipe are in a stringy state. The cold material plug 24 that falls off after impact will not fall off in time due to the stringy effect, resulting in poor cleaning effect. With the piercing and driving of the sharp block 20, even if it is stringy, it can be stably detached. After the replacement is completed, the valve on the surface of the air pipe 23 is activated, so that the gas blown out of the heat insulation pipe 1102 can impact and detach the pierced cold material plug 24 through the air outlet.

[0050] When the second tube 18 moves away from the rotating block 7, the heat insulation block 21 moves synchronously to seal the inner wall of the first tube 17, preventing the molten material from continuing to flow out. During this process, the round tube 11 will not come into contact with the surface of the stationary mold 4, thus preventing scratching and protecting the safety of the stationary mold 4.

[0051] Please see Figure 11 The surface of the heat insulation block 21 facing away from the first pipe 17 is also coated with an anti-stick coating, and a heating block is installed inside the heat insulation block 21. When the electric push rod 3 19 retracts and encounters resistance (at this time, the cured area of ​​the cold material plug 24 crosses the heat insulation block 21, so it is disturbed when the retraction drives the stationary mold part 4 to move), the heating block is activated to soften the cold material plug 24 cured on the surface of the heat insulation block 21, so as to facilitate retraction and exposure of the cold material plug 24.

[0052] Finally, in this application, the drive motor 10, electric actuator 102, electric actuator 2 13 and electric actuator 3 19 are all prior art, and their models and working principles are not described in detail here. The specific models can be selected according to the actual situation and are not fixed.

[0053] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A rotary multi-station bottle cap injection mold, comprising an injection table (1), characterized in that: The top of the injection molding station (1) is equipped with a feeding pipe (3) and a hydraulic telescopic rod (5) located on one side of the feeding pipe (3) via a bracket. A raw material cylinder (2) is installed through the top of the feeding pipe (3). A stationary mold component (4) is connected through the tail end of the feeding pipe (3). A moving frame (6) is connected to the power end of the hydraulic telescopic rod (5). A rotating pipe (12) is connected to the top of the moving frame (6). A rotating block (7) is fixedly sleeved on the surface of the rotating pipe (12). A round pipe component (11) is fitted at each of the four corners of the rotating block (7). An air outlet pipe (1103) and a recovery pipe (1104) are arranged on the surface of the round pipe component (11). The rotating block (7) is equipped with a component that is connected to the round pipe component. (11) A corresponding electric actuator (13) is provided, and the power end of the electric actuator (13) is connected to the surface of the round tube (11). The round tube (11) is equipped with a heat insulation tube (1102) with a built-in heating wire. The heat insulation tube (1102) and the inner wall of the round tube (11) form a recovery chamber (1101). The tail ends of the recovery tube (1104) and the air outlet tube (1103) extend to the inside of the recovery chamber (1101) and the heat insulation tube (1102), respectively. The four surfaces of the rotating block (7) are inlaid with moving molds (8). The moving molds (8) are provided with a preheating chamber (16). The top of the recovery chamber (1101) is equipped with a return pipe (15) whose tail end extends into the preheating chamber (16).

2. The rotary multi-station bottle cap injection mold according to claim 1, characterized in that: The movable frame (6) has multiple cooling slots (601) on one side surface near the rotating block (7). An air pump (9) is installed on the top of the movable frame (6). The output end of the air pump (9) is connected to two hoses (22), and the tail ends of the two hoses (22) extend into the cooling slots (601) and the rotating pipe (12), respectively.

3. The rotary multi-station bottle cap injection mold according to claim 1, characterized in that: The top of the rotating block (7) is provided with a rectangular groove, and the bottom of the rotating tube (12) is connected to the bottom wall of the rectangular groove. An air pump (702) located on one side of the rotating tube (12) is installed inside the rectangular groove, and the output end of the air pump (702) is connected to a discharge pipe (701) extending to the top of the rotating block (7). The input end of the air pump (702) is connected to a gas collecting pipe whose surface is connected to the tail end of multiple return pipes (15).

4. The rotary multi-station bottle cap injection mold according to claim 1, characterized in that: The top of the mobile frame (6) is equipped with a drive motor (10), and the output end of the drive motor (10) is connected to the surface of the rotating tube (12) by a conveyor belt. The rotating tube (12) and the heat insulation tube (1102) are connected by an air supply pipe (14).

5. A rotary multi-station bottle cap injection mold according to claim 1, characterized in that: The surface of the injection molding station (1) is equipped with a bracket with an L-shaped cross section. The surface of the bracket is equipped with an electric push rod (102). The power end of the electric push rod (102) is connected to a cooling mold (101) that is the same as the static mold part (4).

6. A rotary multi-station bottle cap injection mold according to claim 1, characterized in that: The preheating chamber (16) is connected to a tail pipe, and the tail end of the tail pipe extends to one side of the moving mold (8). A waterproof and breathable plate is installed inside the preheating chamber (16), and a filter screen is installed on the side surface of the waterproof and breathable plate near the return pipe (15).

7. A rotary multi-station bottle cap injection mold according to claim 1, characterized in that: The tail end of the feeding pipe (3) is provided with a cleaning component. The cleaning component includes a first pipe (17) connected to the tail end of the feeding pipe (3). A limit block is connected to the surface of the first pipe (17). A second pipe (18) is slidably sleeved on the surface of the first pipe (17) and fixedly connected to the stationary mold (4). The inner wall of the second pipe (18) is provided with a sliding groove that matches the limit block. An electric push rod three (19) is connected to the surface of the tail end of the feeding pipe (3). The power end of the electric push rod three (19) is connected to the surface of the stationary mold (4).

8. A rotary multi-station bottle cap injection mold according to claim 7, characterized in that: Both the first pipe (17) and the second pipe (18) are made of heat insulation material, and the inner walls of the first pipe (17) and the second pipe (18) are coated with a high-temperature resistant and non-stick coating. The surface of the round pipe fitting (11) is equipped with a pointed block (20) with an air outlet at the end through a bracket at the position corresponding to the second pipe (18). The pointed block (20) and the heat insulation pipe (1102) are connected through an air pipe (23). The inside of the second pipe (18) is equipped with a heat insulation block (21) with the same diameter as the inner diameter of the first pipe (17) through a bracket.

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