Injection molding device for medical plastic bottle production

Abstract

The invention relates to the technical field of plastic bottle production, in particular to an injection molding device for medical plastic bottle production, which comprises a stand column, a mounting plate is fixed at the top of the stand column, an injection molding machine is mounted at the bottom of the mounting plate, a supporting plate is fixed outside the stand column, a rotating ring is arranged above the supporting plate, and the rotating ring is rotatably connected with the stand column. A plurality of supporting frames distributed circumferentially are arranged on the side face of the rotating ring, first molds and second molds are arranged on the inner sides of the supporting frames, the first molds are fixedly connected with the supporting frames, the second molds are connected with a driving mechanism, and the driving mechanism is used for driving the second molds to be close to or away from the first molds; cooling plates are embedded in the inner walls of the first mold and the second mold; through the rotary design of multiple molds, injection molding and cooling are synchronously carried out, the waiting time is eliminated, the problems that in the prior art, the injection molding process must be paused to wait for cooling completion, and continuous production cannot be achieved are solved, and the injection molding efficiency of plastic bottles is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic bottle production, and more specifically, to an injection molding device for the production of medical plastic bottles. Background Art

[0002] The production of medical plastic bottles usually adopts high-precision injection molding devices, which mainly include injection molding machines, mold systems, feeding and temperature control units. The injection molding machine heats and plasticizes medical-grade plastics (such as PP, PET) and injects them into the mold for molding. The mold is made of stainless steel to ensure cleanliness and durability, and some are equipped with hot runners to reduce waste.

[0003] However, in the prior art, the plastic bottles after injection molding need to be cooled and shaped in the mold, resulting in the suspension of the injection molding process to wait for the cooling to be completed, and continuous production cannot be achieved, which restricts the improvement of efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide an injection molding device for the production of medical plastic bottles to solve the problems raised in the above background art.

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

[0006] An injection molding device for the production of medical plastic bottles includes a column. An installation plate is fixed at the top of the column, and an injection molding machine is installed at the bottom of the installation plate. A support plate is fixed outside the column, and a rotating ring is provided above the support plate. The rotating ring is rotatably connected to the column. Among them, the rotating ring is connected with a rotating mechanism, and the rotating mechanism is used to drive the rotating ring to rotate. A plurality of support frames distributed in a circumferential manner are provided on the side of the rotating ring. A first mold and a second mold are arranged inside the support frames. The first mold is fixedly connected with the support frame, and the second mold is connected with a driving mechanism. The driving mechanism is used to drive the second mold to approach or move away from the first mold. Cooling plates are embedded on the inner walls of the first mold and the second mold. The side walls of the cooling plates are adapted to the inner walls of the first mold and the second mold. The cooling plates are connected with a cooling mechanism, and the cooling mechanism is used to cool the cooling plates.

[0007] Preferably: The rotating mechanism includes a toothed ring fixed outside the rotating ring. A motor is installed at the bottom of the support plate. The output end of the motor penetrates through the support plate and is fixedly connected with a first gear, and the first gear meshes with the toothed ring.

[0008] Preferably, the driving mechanism includes a top plate disposed below the first mold. A hydraulic cylinder is installed at the bottom of the support plate, and the telescopic end of the hydraulic cylinder is fixedly connected to the top plate. The second mold is connected with a sliding component and a fixing component. When the hydraulic cylinder drives the first mold to move upward through the top plate, the sliding component is used to drive the second mold closer to the first mold. And when the first mold is in contact with the second mold, the fixing component is used to fix the second mold. Symmetrically distributed fixing blocks are fixed on the side wall of the support frame. Guide rods penetrate through the fixing blocks, and the guide rods are slidably connected to the fixing blocks. Fixing plates are fixedly connected to the bottoms of the guide rods, and the fixing plates are fixedly connected to the rotating ring. First elastic members are arranged outside the guide rods, and the two ends of the first elastic members are respectively fixedly connected to the fixing blocks and the fixing plates.

[0009] Preferably, the sliding component includes symmetrically distributed sliders fixed on the side wall of the second mold. Symmetrically distributed chutes adapted to the sliders are provided on the inner wall of the support frame. The sliders are located inside the chutes and are slidably connected to the chutes. Second elastic members are fixed on the side walls of the sliders, and the other ends of the second elastic members are fixedly connected to the inner walls of the chutes. A trapezoidal block is fixed on the side wall of the second mold, and an extrusion block capable of extruding the trapezoidal block is fixed on the bottom of the top plate.

[0010] Preferably, the fixing component includes symmetrically distributed clamping grooves provided on the side wall of the second mold. Symmetrically distributed grooves are provided on the inner wall of the support frame. A clamping block adapted to the clamping groove is slidably connected inside the groove. A support rod is fixed to the clamping block, and the support rod penetrates through the side wall of the support frame and is slidably connected to the side wall of the support frame. A stop block is fixed to the end of the support rod. A third elastic member is fixed to one side of the stop block, and the other end of the third elastic member is fixedly connected to the outer wall of the support frame. A traction component is connected to the other side of the stop block, and the traction component is used to pull the clamping block into the groove.

[0011] Preferably, the traction component includes a baffle fixed to the side wall of the support frame. A guide post is fixed to the bottom of the baffle. A sliding rod penetrates through the guide post and the baffle, and the sliding rod is slidably connected to the guide post and the baffle. A traction plate is fixed to the top of the sliding rod. A fourth elastic member is fixed to the bottom of the traction plate, and the lower end of the fourth elastic member is fixedly connected to the top of the baffle. A wire groove penetrates through the baffle and the guide post, and a traction rope penetrates through the wire groove. The two ends of the traction rope are respectively fixedly connected to the bottom of the traction plate and the stop block. An extrusion convex block capable of simultaneously extruding the sliding rod is fixed to the top of the support plate.

[0012] Preferably, the cooling mechanism includes a connecting plate fixedly connected to the support frame. The connecting plate is fixedly connected with a cooling box and a pressure cylinder. The pressure cylinder is communicated with the cooling box through a first cooling pipe. A piston is slidably connected inside the pressure cylinder. The piston is connected with an extrusion component, and the extrusion component is used to extrude the piston. The cooling box is communicated with a second cooling pipe. A cooling cavity is provided inside the cooling plate, and the cooling cavity is communicated with the second cooling pipe.

[0013] Preferably, the extrusion assembly includes a threaded sleeve fixedly connected to the top of the piston, a threaded rod threadedly connected to the upper end of the threaded sleeve, the threaded rod passing through the top of the pressure cylinder and rotatably connected to the top of the pressure cylinder, a second gear fixed to the top of the threaded rod, a plurality of fixing columns fixed to the bottom of the mounting plate, a first arc-shaped rack and a second arc-shaped rack capable of meshing with the second gear fixed to the bottom of the fixing columns, the first arc-shaped rack and the second arc-shaped rack being respectively located on both sides of the second gear, a limiting block fixed to the side wall of the threaded sleeve, and a limiting groove adapted to the limiting block provided on the inner wall of the pressure cylinder, the end of the limiting block being located inside the limiting groove and slidably connected to the limiting groove.

[0014] Preferably, grooves adapted to the cooling plates are provided on the inner walls of the first mold and the second mold, the cooling plates are slidably connected to the grooves, push rods are integrally formed on the cooling plates respectively, the push rods penetrate through the side walls of the first mold and the second mold respectively, a cooling channel is provided inside the push rods, one end of the cooling channel communicates with the cooling cavity inside the cooling plate, the other end of the cooling channel communicates with the second cooling pipe, push plates are fixed to the outside of the push rods respectively, fifth elastic members are fixed to the side walls of the push plates, and the other ends of the fifth elastic members are respectively fixed to the outer walls of the first mold and the second mold, and the push rods are connected with a pushing assembly for pushing the push rods.

[0015] Preferably, the pushing assembly includes a first magnet fixed to the end of the push rod, a vertical plate fixed to the top of the support plate, and a second magnet fixed to the side wall of the vertical plate, the first magnet and the second magnet having the same magnetic property.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: When the present invention is used for injection molding of plastic bottles, by driving the plurality of molds to perform circular motion through the rotating ring, while the injection molding machine injects into one mold, the remaining molds can be cooled synchronously. Through the multi-mold rotation design, the injection molding and cooling are carried out synchronously, eliminating the waiting time, solving the problem in the prior art that the injection molding process must be paused and waiting for the cooling to be completed, and continuous production cannot be achieved, effectively improving the injection molding efficiency of plastic bottles;

[0017] In the present invention, the cooling plates on the inner walls of the first mold and the second mold accelerate the cooling and forming of the plastic bottles. After the first mold and the second mold are separated, the cooling plates will also push the plastic bottles, which can effectively avoid the phenomenon that the plastic bottles are stuck on the inner walls of the first mold or the second mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the injection molding device in the embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the connection structure between the support plate and the column in the embodiment of the present invention.

[0020] Figure 3 This is a schematic structural diagram of the first arc rack and the second arc rack in the embodiment of the present invention.

[0021] Figure 4 is Figure 3 the enlarged view at position A in

[0022] Figure 5 This is a schematic structural diagram of the first mold and the second mold in the embodiment of the present invention.

[0023] Figure 6 This is a schematic internal structure diagram of the cooling plate in the embodiment of the present invention.

[0024] Figure 7 This is the front view of the internal structure of the pressure cylinder in the embodiment of the present invention.

[0025] In the figure: 1 - column; 2 - rotating ring; 3 - rotating mechanism; 31 - first gear; 32 - toothed ring; 33 - motor; 4 - driving mechanism; 41 - fixed block; 42 - first elastic member; 43 - guide rod; 44 - fixing plate; 45 - trapezoidal block; 46 - extrusion block; 47 - slider; 48 - chute; 49 - second elastic member; 410 - card slot; 411 - card block; 412 - support rod; 413 - third elastic member; 414 - stop block; 415 - towing rope; 416 - guide post; 417 - baffle; 418 - towing plate; 419 - fourth elastic member; 420 - slide rod; 421 - extrusion convex block; 422 - hydraulic cylinder; 423 - top plate; 5 - cooling mechanism; 51 - connecting plate; 52 - pressure cylinder; 53 - cooling box; 54 - first cooling pipe; 55 - second cooling pipe; 56 - piston; 57 - limit block; 58 - limit groove; 59 - threaded rod; 510 - threaded sleeve; 511 - push plate; 512 - second gear; 513 - fixed column; 514 - first arc rack; 515 - second arc rack; 516 - cooling cavity; 517 - cooling channel; 518 - push rod; 519 - fifth elastic member; 520 - first magnet; 521 - second magnet; 522 - vertical plate; 6 - mounting plate; 7 - injection molding machine; 8 - support frame; 9 - first mold; 10 - second mold; 11 - cooling plate; 12 - support plate. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0028] In one embodiment, please refer to Figure 1, 2 , Figure 5 and Figure 6 , an injection molding device for producing medical plastic bottles, comprising a column 1, a mounting plate 6 is fixed to the top of the column 1, an injection molding machine 7 is installed at the bottom of the mounting plate 6, a support plate 12 is fixed to the outside of the column 1, a rotating ring 2 is arranged above the support plate 12, the rotating ring 2 is rotatably connected to the column 1, wherein the rotating ring 2 is connected with a rotating mechanism 3, and the rotating mechanism 3 is used to drive the rotating ring 2 to rotate. A plurality of support frames 8 distributed in a circumferential manner are arranged on the side surface of the rotating ring 2. A first mold 9 and a second mold 10 are arranged inside the support frames 8. The first mold 9 is fixedly connected with the support frames 8, and the second mold 10 is connected with a driving mechanism 4. The driving mechanism 4 is used to drive the second mold 10 to approach or move away from the first mold 9. Cooling plates 11 are embedded on the inner walls of the first mold 9 and the second mold 10. The side walls of the cooling plates 11 are adapted to the inner walls of the first mold 9 and the second mold 10. The cooling plates 11 are connected with a cooling mechanism 5, and the cooling mechanism 5 is used to cool the cooling plates 11.

[0029] In this embodiment, when the device is used for injection molding of plastic bottles, the rotating mechanism 3 drives the rotating ring 2 to rotate. The rotating ring 2 drives the first mold 9 and the second mold 10 to move in a circular motion through the support frames 8. When the support frame 8 rotates below the injection molding machine 7, the rotating mechanism 3 stops driving the rotating ring 2 to rotate, and the driving mechanism 4 drives the second mold 10 to approach the first mold 9 until the first mold 9 and the second mold 10 are tightly attached. At this time, the first mold 9 and the second mold 10 form a complete plastic bottle forming mold. Subsequently, the plastic melt can be injected into the mold through the injection molding machine 7, and finally a plastic bottle is formed. The injection molding machine 7 can be an injection blow molding integrated machine, which first injects the material melt into the mold and then performs blow molding. The above is the prior art and will not be elaborated here. After the plastic bottle is formed, the rotating mechanism 3 continues to drive the rotating ring 2 to rotate until another support frame 8 moves below the injection molding machine 7. At this time, the injection molding machine 7 can inject the plastic melt into another mold, and at the same time, the cooling mechanism 5 cools the cooling plate 11 inside the previous mold, thereby accelerating the cooling and forming of the plastic bottle. Injection and cooling can be carried out simultaneously, that is, while the injection molding machine 7 injects into one mold, the remaining molds can be cooled synchronously, eliminating the waiting time, especially suitable for mass production of medical plastic bottles. On the premise of ensuring quality, the production cycle is shortened, and the injection molding efficiency of the plastic bottle is effectively improved. After the plastic bottle is cooled and formed, the rotating mechanism 3 continues to drive the rotating ring 2 to rotate. When the rotating ring 2 rotates to a certain extent, the driving mechanism 4 drives the second mold 10 to move away from the first mold 9, and the formed plastic bottle automatically falls off between the first mold 9 and the second mold 10.

[0030] Please refer to Figure 2, the rotation mechanism 3 includes a toothed ring 32 fixed to the outside of the rotating ring 2. A motor 33 is installed at the bottom of the support plate 12. The output end of the motor 33 penetrates through the support plate 12 and is fixedly connected to a first gear 31. The first gear 31 meshes with the toothed ring 32;

[0031] When injecting plastic bottles for production, start the motor 33. The motor 33 drives the first gear 31 to rotate. Through the meshing of the first gear 31 and the toothed ring 32, the rotating ring 2 is driven to rotate. The rotating ring 2 drives a plurality of support frames 8 to perform synchronous circular motion, so that the plurality of support frames 8 can sequentially move below the injection molding machine 7, and further enables injection molding and cooling to be carried out synchronously, effectively improving the injection molding efficiency of plastic bottles.

[0032] Please refer to Figure 2 and Figure 3 , the driving mechanism 4 includes a top plate 423 arranged below the first mold 9. A hydraulic cylinder 422 is installed at the bottom of the support plate 12. The telescopic end of the hydraulic cylinder 422 is fixedly connected to the top plate 423. The second mold 10 is connected with a sliding component and a fixing component. When the hydraulic cylinder 422 drives the first mold 9 to move upward through the top plate 423, the sliding component is used to drive the second mold 10 to approach the first mold 9. And when the first mold 9 and the second mold 10 are in contact, the fixing component is used to fix the second mold 10. Symmetrically distributed fixing blocks 41 are fixed on the side wall of the support frame 8. Guide rods 43 penetrate through the inside of the fixing blocks 41. The guide rods 43 are slidably connected to the fixing blocks 41. Fixed plates 44 are fixed at the bottoms of the guide rods 43. The fixed plates 44 are fixedly connected to the rotating ring 2. First elastic members 42 are arranged outside the guide rods 43. Two ends of the first elastic members 42 are respectively fixedly connected to the fixing blocks 41 and the fixed plates 44;

[0033] When one of the support frames 8 moves under the injection molding machine 7, the hydraulic cylinder 422 drives the top plate 423 to move upward. The top plate 423 squeezes the second mold 10, and the second mold 10 drives the first mold 9 to move upward synchronously through the support frame 8, so that the discharge end on the injection molding machine 7 can enter between the first mold 9 and the second mold 10. Furthermore, the plastic melt extruded by the injection molding machine 7 can completely enter the mold, ensuring the forming effect of the plastic bottle. In addition, while the top plate 423 drives the support frame 8 to move upward, the sliding assembly also drives the second mold 10 to approach the first mold 9. When the discharge end on the injection molding machine 7 enters between the first mold 9 and the second mold 10, the first mold 9 and the second mold 10 just fit tightly. At the same time, the second mold 10 is fixed by the fixing component. After the plastic bottle is injection molded, the hydraulic cylinder 422 drives the top plate 423 to move downward, and the support frame 8 automatically moves downward under the action of the fixed block 41 and the first elastic member 42. The first elastic member 42 can be a spring, so as to drive the first mold 9 and the second mold 10 to move downward. At this time, the discharge end of the injection molding machine 7 automatically moves above the first mold 9 and the second mold 10. The fixing plate 44 can play a limiting role on the support frame 8 through the guide rod 43 and the fixed block 41. On the one hand, it can improve the stability of the support frame 8 during the up and down movement. On the other hand, the rotating ring 2 can drive the support frame 8 to move in a circular motion through the fixing plate 44, the guide rod 43 and the fixed block 41.

[0034] Please refer to Figure 5 , the sliding assembly includes sliders 47 fixed on the side wall of the second mold 10 and symmetrically distributed. There are symmetrically distributed chutes 48 on the inner wall of the support frame 8 and adapted to the sliders 47. The sliders 47 are located inside the chutes 48 and are slidably connected to the chutes 48. A second elastic member 49 is fixed on the side wall of the slider 47, and the other end of the second elastic member 49 is fixed to the inner wall of the chute 48. A trapezoidal block 45 is fixed on the side wall of the second mold 10, and an extrusion block 46 capable of squeezing the trapezoidal block 45 is fixed on the bottom of the top plate 423;

[0035] While the top plate 423 drives the support frame 8 to move upward, the second mold 10 also drives the trapezoidal block 45 to move upward. While the trapezoidal block 45 moves upward, the extrusion block 46 extrudes its inclined surface, so that the second mold 10 can approach the first mold 9. In addition, while the second mold 10 moves, it also drives the slider 47 to slide inside the chute 48. The chute 48 can play a limiting role on the second mold 10 through the slider 47, thereby effectively improving the stability of the second mold 10 during movement. And while the slider 47 moves, it also extrudes the second elastic member 49, making the second elastic member 49 in a compressed state. The second elastic member 49 can be a spring. After the plastic bottle after injection molding cools down, the fixing component no longer fixes the second mold 10, and the second elastic member 49 releases elastic potential energy, so as to drive the second mold 10 to move away from the first mold 9 through the slider 47, so that the formed plastic bottle can automatically fall off between the first mold 9 and the second mold 10.

[0036] Please refer to Figure 4 and Figure 5 The fixing component includes clamping grooves 410 which are symmetrically arranged on the side wall of the second mold 10. Symmetrically distributed grooves are arranged on the inner wall of the support frame 8. A clamping block 411 adapted to the clamping groove 410 is slidably connected inside the groove. A support rod 412 is fixed to the clamping block 411. The support rod 412 penetrates the side wall of the support frame 8 and is slidably connected to the side wall of the support frame 8. A stop block 414 is fixed to the end of the support rod 412. A third elastic member 413 is fixed to one side of the stop block 414. The other end of the third elastic member 413 is fixed to the outer wall of the support frame 8. A traction member is connected to the other side of the stop block 414, and the traction member is used to pull the clamping block 411 into the groove.

[0037] When the second mold 10 moves to a certain position, the second mold 10 extrudes the clamping block 411, so as to squeeze the clamping block 411 into the groove. One side of the clamping block 411 close to the second mold 10 has an inclined surface. When the second mold 10 is in close fit with the second mold 10, the clamping block 411 is exactly aligned with the clamping groove 410. The clamping block 411 automatically enters the clamping groove 410 under the action of the stop block 414 and the third elastic member 413. The third elastic member 413 can be a spring. At this time, the clamping block 411 plays a fixing role on the second mold 10 through the clamping groove 410. After the plastic bottle cools down, the rotating ring 2 continues to drive the support frame 8 to move in a circular motion. When the support frame 8 moves in a circular motion to a certain position, the traction member automatically pulls the clamping block 411 into the groove. Losing the limit of the clamping block 411, the second mold 10 automatically resets, and the cooled plastic bottle automatically falls off between the first mold 9 and the second mold 10.

[0038] Please refer to Figure 2 、 Figure 3 and Figure 4, the traction component includes a baffle 417 fixedly connected to the side wall of the support frame 8. A guide post 416 is fixed to the bottom of the baffle 417. A slide bar 420 passes through the baffle 417 and the guide post 416. The slide bar 420 is slidably connected to the guide post 416 and the baffle 417. A traction plate 418 is fixed to the top of the slide bar 420. A fourth elastic member 419 is fixed to the bottom of the traction plate 418. The lower end of the fourth elastic member 419 is fixedly connected to the top of the baffle 417. A wire groove passes through the baffle 417 and the guide post 416. A traction rope 415 passes through the wire groove. Two ends of the traction rope 415 are respectively fixedly connected to the bottom of the traction plate 418 and the stopper 414. An extrusion bump 421 capable of simultaneously extruding the slide bar 420 is fixed to the top of the support plate 12;

[0039] After the plastic bottle is cooled, the rotating ring 2 continues to drive the support frame 8 to move in a circular motion. When the support frame 8 moves to a certain position in the circular motion, the extrusion bump 421 on the top of the support plate 12 extrudes the slide bar 420, so that the slide bar 420 drives the traction plate 418 to move upward. Under the guidance of the wire groove, while the traction plate 418 moves upward, it pulls the stopper 414 through the traction rope 415. The stopper 414 pulls the latch 411 into the groove through the support rod 412, so that the second mold 10 can be automatically reset. When the extrusion bump 421 no longer extrudes the slide bar 420, the baffle 417 automatically resets under the action of the fourth elastic member 419, thereby releasing the traction state of the traction rope 415 on the stopper 414. The fourth elastic member 419 can be a spring. And in order to prevent the slide bar 420 from driving the baffle 417 to move upward through the traction plate 418 and the fourth elastic member 419 when moving upward, a limit plate can be provided on the side wall of the column 1. When the extrusion bump extrudes the slide bar 420, the support frame 8 just moves below the limit plate, and the upward movement of the support frame 8 is restricted by the limit plate, so as to ensure that the traction plate 418 can pull the stopper 414 through the traction rope 415.

[0040] Please refer to Figure 3 、 Figure 6 and Figure 7 , the cooling mechanism 5 includes a connecting plate 51 fixedly connected to the support frame 8. The connecting plate 51 is fixedly connected with a cooling box 53 and a pressure cylinder 52. The pressure cylinder 52 is communicated with the cooling box 53 through a first cooling pipe 54. A piston 56 is slidably connected inside the pressure cylinder 52. The piston 56 is connected with an extrusion assembly for extruding the piston 56. The cooling box 53 is communicated with a second cooling pipe 55. A cooling cavity 516 is provided inside the cooling plate 11. The cooling cavity 516 is communicated with the second cooling pipe 55;

[0041] After the plastic bottle is injection molded, the rotating ring 2 drives the connecting plate 51 to move in a circular motion through the support frame 8. The connecting plate 51 drives the pressure cylinder 52 to move in a circular motion. During this process, the extrusion assembly extrudes the piston 56. The piston 56 extrudes the coolant below it. The coolant enters the interior of the cooling tank 53 through the first cooling pipe 54, and then enters the interior of the cooling cavity 516 through the second cooling pipe 55. At this time, the coolant is stored in the cooling cavity 516. The coolant in the cooling cavity 516 cools the cooling plate 11, thereby accelerating the cooling and forming of the plastic bottle. After the plastic bottle is cooled and formed, the rotating ring 2 continues to drive the connecting plate 51 to move in a circular motion through the support frame 8. At this time, the extrusion assembly drives the piston 56 to move in the reverse direction, and a negative pressure is formed below the piston 56. Then, the coolant in the cooling cavity 516 is pumped into the cooling tank 53 through the second cooling pipe 55, and the cooling tank 53 cools the coolant, so as to ensure the temperature of the coolant for the next use.

[0042] Please refer to Figure 3 and Figure 7 The extrusion assembly includes a threaded sleeve 510 fixedly connected to the top of the piston 56, a threaded rod 59 threadedly connected to the upper end of the threaded sleeve 510. The threaded rod 59 penetrates through the top of the pressure cylinder 52 and is rotatably connected to the top of the pressure cylinder 52. A second gear 512 is fixed to the top of the threaded rod 59. A plurality of fixed columns 513 are fixed to the bottom of the mounting plate 6. A first arc-shaped rack 514 and a second arc-shaped rack 515 that can mesh with the second gear 512 are fixed to the bottom of the fixed columns 513. The first arc-shaped rack 514 and the second arc-shaped rack 515 are respectively located on both sides of the second gear 512. A limiting block 57 is fixed to the side wall of the threaded sleeve 510. A limiting groove 58 adapted to the limiting block 57 is provided on the inner wall of the pressure cylinder 52. The end of the limiting block 57 is located inside the limiting groove 58 and is slidably connected to the limiting groove 58;

[0043] After the plastic bottle is injection-molded, the rotating ring 2 drives the connecting plate 51 to perform a circular motion through the support frame 8. The connecting plate 51 drives the pressure cylinder 52 to move. When the pressure cylinder 52 rotates to a certain position, the second gear 512 at the top of the threaded rod 59 meshes with the first arc-shaped rack 514. As the pressure cylinder 52 continues to rotate, the first arc-shaped rack 514 drives the threaded rod 59 to rotate through the engagement with the second gear 512. Through the threaded connection between the threaded rod 59 and the threaded sleeve 510, the piston 56 is driven to move downward, so that the piston 56 can squeeze the coolant inside the cooling tank 53 into the cooling cavity 516. When the cooling cavity 516 is filled with coolant, the second gear 512 just disengages from the engagement with the first arc-shaped rack 514. After the plastic bottle is cooled and formed, the rotating ring 2 continues to drive the pressure cylinder 52 to perform a circular motion through the support frame 8. When the pressure cylinder 52 rotates to a certain position, the second gear 512 at the top of the threaded rod 59 meshes with the second arc-shaped rack 515. Since the first arc-shaped rack 514 and the second arc-shaped rack 515 are respectively located on both sides of the second gear 512, as the pressure cylinder 52 continues to rotate, the second arc-shaped rack 515 drives the threaded rod 59 to reverse through the engagement with the second gear 512. Through the threaded connection between the threaded rod 59 and the threaded sleeve 510, the piston 56 is driven to move upward, and a negative pressure is formed below the piston 56. Then, the coolant inside the cooling cavity 516 is extracted into the cooling tank 53 through the second cooling pipe 55, and the coolant is cooled by the cooling tank 53.

[0044] In another embodiment, please refer to Figure 6 , grooves adapted to the cooling plate 11 are provided on the inner walls of the first mold 9 and the second mold 10. The cooling plate 11 is slidably connected to the grooves. Push rods 518 are integrally formed on the cooling plate 11. The push rods 518 respectively penetrate through the side walls of the first mold 9 and the second mold 10. A cooling channel 517 is provided inside the push rod 518. One end of the cooling channel 517 communicates with the cooling cavity 516 inside the cooling plate 11, and the other end of the cooling channel 517 communicates with the second cooling pipe 55. Push plates 511 are respectively fixed outside the push rods 518. Fifth elastic members 519 are fixed on the side walls of the push plates 511. The other ends of the fifth elastic members 519 are respectively fixed to the outer walls of the first mold 9 and the second mold 10. The push rod 518 is connected to a pushing assembly for pushing the push rod 518;

[0045] In this embodiment, the cooling channel 517 inside the push rod 518 is used to divert the coolant, so that the coolant can enter and exit the cooling cavity 516. The push rod 518 is connected to a pushing component. After the first mold 9 and the second mold 10 are separated, the pushing component pushes the push rod 518, and the push rod 518 pushes the cooled plastic bottle out of the first mold 9 or the second mold 10 through the cooling plate 11, which can effectively avoid the phenomenon that the cooled plastic bottle is stuck inside the first mold 9 or the second mold 10. The fifth elastic member 519 can play a reset role on the push rod 518 through the push plate 511, so that the cooling plate 11 can be reset to the inside of the groove body. The fifth elastic member 519 can be a spring.

[0046] Please refer to Figure 2 and Figure 7 , the pushing component includes a first magnet 520 fixed at the end of the push rod 518. A vertical plate 522 is fixed on the top of the support plate 12, and a second magnet 521 is fixed on the side wall of the vertical plate 522. The first magnet 520 and the second magnet 521 have the same magnetic property;

[0047] After the first mold 9 and the second mold 10 are separated, the rotating ring 2 continues to drive the first mold 9 and the second mold 10 to perform circular motion through the support frame 8. When the first mold 9 and the second mold 10 rotate to a certain position, the second magnet 521 on the vertical plate 522 repels the first magnet 520 at the end of the push rod 518, so that the push rod 518 drives the cooling plate 11 to move, and the cooled plastic bottle is pushed out of the first mold 9 or the second mold 10 through the cooling plate 11, which can effectively avoid the phenomenon that the cooled plastic bottle is stuck inside the first mold 9 or the second mold 10.

[0048] Working principle: When the device is used for injection molding of plastic bottles, the rotation of the rotating ring 2 is driven by the meshing of the first gear 31 and the toothed ring 32. The rotating ring 2 drives multiple support frames 8 to perform synchronous circular motion, so that the multiple support frames 8 can sequentially move below the injection molding machine 7. When one of the support frames 8 rotates below the injection molding machine 7, the rotation of the rotating ring 2 stops. The top plate 423 is driven by the hydraulic cylinder 422 to move upward. The top plate 423 squeezes the second mold 10. The second mold 10 drives the first mold 9 to move upward synchronously through the support frame 8, so that the discharge end on the injection molding machine 7 can enter between the first mold 9 and the second mold 10. In addition, while the top plate 423 drives the support frame 8 to move upward, the second mold 10 also drives the trapezoidal block 45 to move upward. While the trapezoidal block 45 moves upward, the extrusion block 46 squeezes its inclined surface, so that the second mold 10 can approach the first mold 9 until the first mold 9 and the second mold 10 are in close contact. And when the second mold 10 and the second mold 10 are in close contact, the latch 411 automatically enters the inside of the card slot 410, and the latch 411 plays a fixing role on the second mold 10 through the card slot 410. Subsequently, the plastic melt can be injected into the mold through the injection molding machine 7. After the plastic bottle injection molding is completed, the hydraulic cylinder 422 drives the top plate 423 to move downward, and the top plate 423 no longer supports the second mold 10. The support frame 8 automatically resets, driving the first mold 9 and the second mold 10 to move downward. At this time, the discharge end of the injection molding machine 7 automatically moves above the first mold 9 and the second mold 10;

[0049] Subsequently, the rotating ring 2 continues to drive the support frame 8 to rotate. The support frame 8 drives the pressure cylinder 52 to move in a circular motion through the connecting plate 51. When the pressure cylinder 52 rotates to a certain position, the second gear 512 at the top of the threaded rod 59 meshes with the first arc-shaped rack 514. As the pressure cylinder 52 continues to rotate, the first arc-shaped rack 514 drives the threaded rod 59 to rotate through meshing with the second gear 512. Through the threaded connection between the threaded rod 59 and the threaded sleeve 510, the piston 56 moves downward. The piston 56 squeezes the coolant below it, and the coolant enters the interior of the cooling tank 53 through the first cooling pipe 54 and then enters the interior of the cooling cavity 516 through the second cooling pipe 55. At this time, the coolant is stored in the cooling cavity 516 inside the cooling chamber. The coolant inside the cooling cavity 516 cools the cooling plate 11, thereby accelerating the cooling and forming of the plastic bottle. When the cooling cavity 516 is filled with coolant, the second gear 512 just disengages from the meshing with the first arc-shaped rack 514. After the plastic bottle is cooled and formed, the rotating ring 2 continues to drive the pressure cylinder 52 to move in a circular motion through the support frame 8. When the pressure cylinder 52 rotates to a certain position, the second gear 512 at the top of the threaded rod 59 meshes with the second arc-shaped rack 515. Since the first arc-shaped rack 514 and the second arc-shaped rack 515 are respectively located on both sides of the second gear 512, as the pressure cylinder 52 continues to rotate, the second arc-shaped rack 515 drives the threaded rod 59 to reverse through meshing with the second gear 512. Through the threaded connection between the threaded rod 59 and the threaded sleeve 510, the piston 56 moves upward. A negative pressure is formed below the piston 56, and then the coolant inside the cooling cavity 516 is pumped into the interior of the cooling tank 53 through the second cooling pipe 55. The cooling tank 53 cools the coolant, thereby ensuring the temperature of the coolant for the next use;

[0050] After the plastic bottle is cooled, the rotating ring 2 continues to drive the support frame 8 to move in a circular motion. When the support frame 8 moves to a certain position in the circular motion, the extrusion bump 421 on the top of the support plate 12 extrudes the sliding rod 420, so that the sliding rod 420 drives the traction plate 418 to move upward. Under the guidance of the wire groove, while the traction plate 418 moves upward, it pulls the stopper 414 through the traction rope 415. The stopper 414 pulls the latch 411 into the groove through the support rod 412. Losing the limit of the latch 411, the second mold 10 automatically resets, and the cooled plastic bottle automatically falls off between the first mold 9 and the second mold 10. After the first mold 9 and the second mold 10 are separated, the rotating ring 2 continues to drive the first mold 9 and the second mold 10 to move in a circular motion through the support frame 8. When the first mold 9 and the second mold 10 rotate to a certain position, the second magnet 521 on the vertical plate 522 repels the first magnet 520 at the end of the push rod 518, so that the push rod 518 drives the cooling plate 11 to move, and the cooled plastic bottle is pushed out from the inside of the first mold 9 or the second mold 10 through the cooling plate 11, which can effectively avoid the phenomenon that the cooled plastic bottle is stuck inside the first mold 9 or the second mold 10.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An injection molding device for producing medical plastic bottles, including a column; characterized in that, An installation plate is fixed at the top of the column, and an injection molding machine is installed at the bottom of the installation plate. A support plate is fixed outside the column, and a rotating ring is arranged above the support plate. The rotating ring is rotatably connected to the column. Among them, the rotating ring is connected with a rotating mechanism, and the rotating mechanism is used to drive the rotating ring to rotate. A plurality of support frames distributed in a circumferential manner are arranged on the side surface of the rotating ring. A first mold and a second mold are arranged inside the support frames. The first mold is fixedly connected with the support frames, and the second mold is connected with a driving mechanism. The driving mechanism is used to drive the second mold to approach or move away from the first mold. Cooling plates are embedded on the inner walls of the first mold and the second mold. The side walls of the cooling plates are adapted to the inner walls of the first mold and the second mold. The cooling plates are connected with a cooling mechanism, and the cooling mechanism is used to cool the cooling plates.

2. The injection molding device for producing medical plastic bottles according to claim 1, characterized in that, The rotating mechanism includes a toothed ring fixed outside the rotating ring. A motor is installed at the bottom of the support plate. The output end of the motor penetrates through the support plate and is fixedly connected with a first gear, and the first gear meshes with the toothed ring.

3. An injection molding device for producing medical plastic bottles according to claim 1, characterized in that, The driving mechanism includes a top plate arranged below the first mold. A hydraulic cylinder is installed at the bottom of the support plate. The telescopic end of the hydraulic cylinder is fixedly connected with the top plate. The second mold is connected with a sliding component and a fixing component. When the hydraulic cylinder drives the first mold to move upward through the top plate, the sliding component is used to drive the second mold to approach the first mold. And when the first mold and the second mold are in contact, the fixing component is used to fix the second mold. Fixed blocks distributed symmetrically are fixed on the side walls of the support frames. Guide rods penetrate through the inside of the fixed blocks, and the guide rods are slidably connected with the fixed blocks. Fixing plates are fixed at the bottoms of the guide rods, and the fixing plates are fixedly connected with the rotating ring. First elastic members are arranged outside the guide rods, and two ends of the first elastic members are respectively fixedly connected with the fixed blocks and the fixing plates.

4. An injection molding device for the production of medical plastic bottles according to claim 3, characterized in that, The sliding component includes sliders fixed on the side walls of the second mold and distributed symmetrically. Slide grooves distributed symmetrically and adapted to the sliders are arranged on the inner walls of the support frames. The sliders are located inside the slide grooves and are slidably connected with the slide grooves. Second elastic members are fixed on the side walls of the sliders, and the other ends of the second elastic members are fixedly connected with the inner walls of the slide grooves. A trapezoidal block is fixed on the side wall of the second mold, and a pressing block capable of pressing the trapezoidal block is fixed at the bottom of the top plate.

5. An injection molding device for producing medical plastic bottles according to claim 3, characterized in that, The fixing component includes clamping grooves arranged on the side walls of the second mold and distributed symmetrically. Grooves distributed symmetrically are arranged on the inner walls of the support frames. Clamping blocks adapted to the clamping grooves are slidably connected inside the grooves. The clamping blocks are fixed with support rods, and the support rods penetrate through the side walls of the support frames and are slidably connected with the side walls of the support frames. A stop block is fixed at the end of the support rod. A third elastic member is fixed on one side of the stop block, and the other end of the third elastic member is fixedly connected with the outer wall of the support frame. A traction component is connected to the other side of the stop block, and the traction component is used to pull the clamping block into the groove.

6. The injection molding device for producing medical plastic bottles according to claim 5, characterized in that, The traction component includes a baffle fixedly connected to the side wall of the support frame. A guide post is fixed to the bottom of the baffle. A slide bar penetrates through the baffle and the guide post, and the slide bar is slidably connected to the guide post and the baffle. A traction plate is fixed to the top of the slide bar. A fourth elastic member is fixed to the bottom of the traction plate, and the lower end of the fourth elastic member is fixedly connected to the top of the baffle. A wire groove penetrates through the baffle and the guide post, and a traction rope penetrates through the wire groove. Two ends of the traction rope are respectively fixedly connected to the bottom of the traction plate and the stop block. An extrusion bump capable of simultaneously extruding the slide bar is fixed to the top of the support plate.

7. An injection molding device for producing medical plastic bottles according to claim 1, wherein, The cooling mechanism includes a connecting plate fixedly connected to the support frame. The connecting plate is fixedly connected with a cooling box and a pressure cylinder. The pressure cylinder is communicated with the cooling box through a first cooling pipe. A piston is slidably connected inside the pressure cylinder. The piston is connected with an extrusion assembly for extruding the piston. The cooling box is communicated with a second cooling pipe. A cooling cavity is arranged inside the cooling plate, and the cooling cavity is communicated with the second cooling pipe.

8. An injection molding device for the production of medical plastic bottles according to claim 7, characterized in that, The extrusion assembly includes a threaded sleeve fixedly connected to the top of the piston. A threaded rod is threadedly connected to the upper end of the threaded sleeve. The threaded rod penetrates through the top of the pressure cylinder and is rotatably connected to the top of the pressure cylinder. A second gear is fixed to the top of the threaded rod. A plurality of fixing columns are fixed to the bottom of the mounting plate. A first arc-shaped rack and a second arc-shaped rack capable of meshing with the second gear are fixed to the bottom of the fixing columns. The first arc-shaped rack and the second arc-shaped rack are respectively located on both sides of the second gear. A limiting block is fixed to the side wall of the threaded sleeve, and a limiting groove adapted to the limiting block is arranged on the inner wall of the pressure cylinder. The end of the limiting block is located inside the limiting groove and is slidably connected to the limiting groove.

9. An injection molding device for the production of medical plastic bottles according to claim 7 or 8, characterized in that, Grooves adapted to the cooling plates are arranged on the inner walls of the first mold and the second mold. The cooling plates are slidably connected to the grooves. Push rods are integrally formed on the cooling plates. The push rods respectively penetrate through the side walls of the first mold and the second mold. A cooling channel is arranged inside the push rod. One end of the cooling channel is communicated with the cooling cavity inside the cooling plate, and the other end of the cooling channel is communicated with the second cooling pipe. Push plates are fixed to the outside of the push rods. Fifth elastic members are fixed to the side walls of the push plates, and the other ends of the fifth elastic members are respectively fixedly connected to the outer walls of the first mold and the second mold. The push rods are connected with a pushing assembly for pushing the push rods.

10. An injection molding device for the production of medical plastic bottles according to claim 9, characterized in that, The pushing assembly includes a first magnet fixed to the end of the push rod. A vertical plate is fixed to the top of the support plate. A second magnet is fixed to the side wall of the vertical plate, and the first magnet and the second magnet have the same magnetic property.

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