An automatic plastic injection molding device

Abstract

This invention relates to the field of injection molding technology, and more particularly to an automatic plastic injection molding device. Its technical solution includes a base, a turntable, an injection tube, a motor, a fixed mold, a moving mold, and a side frame. A frame is mounted on the upper end of the base. A motor is mounted on one end of the frame, and a turntable is mounted on the output end of the motor. A connecting plate is mounted on the outer wall of the rotating shaft. A side frame is mounted on one side of the connecting plate, and a moving mold is mounted on one side of the side frame. A spring is mounted between the side frame and the connecting plate, and a spring is mounted between the moving mold and the side frame. A conical plate is mounted on one side of the upper part of the base. An injection tube is mounted on one side of the fixed mold. A material cylinder is connected to one side of the upper end of the injection tube, and a pusher screw is rotatably mounted inside the injection tube. This invention, through the coordinated use of the moving and fixed molds arranged in a circular array, rationally utilizes the mold opening time, achieving efficient use of the injection structure and improving injection molding efficiency.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, and more particularly to an automatic plastic injection molding device. Background Technology

[0002] Polyurethane elastomers, also known as polyurethane rubber, are thermoplastic polyurethane rubbers that are cross-linked by intermolecular hydrogen bonds or by slight cross-linking between macromolecular chains. These two cross-linking structures are reversible as the temperature rises or falls. A horizontal automatic plastic injection molding machine is a piece of equipment used for the production of plastic products. It includes an injection unit and a mold. Plastic granules are fed into the injection machine through the feed inlet, where they are heated and melted. The molten plastic is then injected into the mold through a high-pressure injection system, and after cooling and hardening, it is removed to form the plastic product. Horizontal automatic plastic injection molding machines are widely used in the production of plastic products such as plastic parts, containers, components, and toys.

[0003] Plastic injection molding molds include a moving mold and a fixed mold. Hot-melt molten plastic is injected into the mold cavity, cools and solidifies, and then the mold opens. During the mold opening process, the injection structure cannot be used, making it impossible to fully utilize the intermittent mold opening time, thus reducing the efficiency of plastic product injection molding. Therefore, those skilled in the art have provided an automated plastic injection molding device to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background art by proposing an automatic plastic injection molding device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic plastic injection molding device, comprising a base, a turntable, an injection tube, a motor, a fixed mold, a moving mold, and a side frame. A frame is mounted on the upper end of the base. A motor is mounted on one end of the frame. A turntable is mounted on the output end of the motor. Connecting plates arranged in a circular array are mounted on the outer wall of the turntable. A side frame is mounted on one side of the connecting plates. A moving mold is mounted on one side of the side frame. A spring is mounted between the side frame and the connecting plates. A spring is mounted between the moving mold and the side frame. A conical plate is mounted on one side above the base. An injection tube is mounted on one side of the fixed mold. A material cylinder is connected to the upper end of the injection tube. A pusher screw is rotatably mounted inside the injection tube. The injection tube and the fixed mold are connected via an injection nozzle.

[0006] Preferably, a sliding sleeve is embedded inside the connecting plate, and a guide rod is provided at one end of the side frame, located inside the second spring and slidably inserted into the sliding sleeve. During the extension and retraction of the second spring, the guide rod slides inside the sliding sleeve, guiding the second spring during the extension and retraction process, preventing the second spring from deviating outward, and ensuring stable lateral extension and retraction of the second spring, providing sliding guidance for the moving side frame.

[0007] Preferably, one end of the side frame is provided with symmetrically distributed positioning seats, and one end of the cone plate is provided with a support rod connected to the frame. The positioning seats are used to dock with the cone plate at its thickest position. Because the cone plate docks with the positioning seats, it applies a stable compressive force to the guide frame. The support rod supports the cone plate and is fixed to one side above the base.

[0008] Preferably, a second support rod is provided on one side of the upper part of the base, and a second conical plate is provided at one end of the second support rod. The second support rod supports the second conical plate, thereby fixing the second conical plate to one side of the upper part of the base, and fixing the second conical plate to the outside of the moving mold during use.

[0009] Preferably, both cone plate one and cone plate two have symmetrically distributed guide surfaces on their outer walls, and the thickness of the guide surfaces gradually increases from both sides towards the center. Through the guide surfaces, cone plate one gradually applies compressive force to the passing positioning seat, and cone plate two gradually applies compressive force to the passing force-bearing plate. Because the guide surfaces are symmetrically distributed, the compressive force on the same positioning seat gradually ends due to the decrease in thickness after being gradually compressed, and the compressive force on the same force-bearing plate gradually ends due to the decrease in thickness after being gradually compressed.

[0010] Preferably, one end of the turntable is provided with support columns arranged in a circular array. A guide rail is sleeved on the outer wall of the frame, and ball bearings are rotatably installed on the inner wall of the support columns, rolling within the guide rail. During the rotation of the turntable, the support columns rotate synchronously, and the ball bearings move within the guide rail, providing rolling support for the rotating support columns, thereby providing rotational support for the turntable, thus improving the stability of the turntable during rotation.

[0011] Preferably, a side plate is provided on one side of the side frame, and the side plate is connected to the moving mold by a spring. A stroke hole is opened inside the moving mold, and a push rod is provided at one end of the side plate, located inside the spring and sliding through the stroke hole. The side plate is supported at one end of the side frame by the elastic force of the spring, while the push rod moves inside the spring and within the stroke hole, so that the spring is slidably guided during the extension and retraction process, preventing the spring from shifting outward during the extension and retraction process. During the extension and retraction of the spring, the push rod drives the push rod through the stroke hole to eject the injection molded part remaining inside the moving mold for unloading the injection molded part.

[0012] Preferably, a force-bearing plate is provided on one side of the side plate, and symmetrically distributed force-bearing beads are rotatably installed inside the force-bearing plate. The side plate corresponds to the second conical plate. During the process of using the force-bearing plate to pass through the second conical plate, the force-bearing beads contact the second conical plate, reducing the resistance of the force-bearing plate and making the passage of the force-bearing plate smoother.

[0013] Preferably, one end of the pusher screw is connected to a motor, a sealing ring is embedded inside the injection tube and slidably mounted on the rotating shaft of the motor, a machine sleeve is fitted onto the outer wall of the motor, and a hydraulic rod with a telescopic end connected to the machine sleeve is fixed on one side of the upper end of the base. The rotational force of the motor output end is applied to the inside of the sealing ring through the rotating shaft, causing it to rotate inside the sealing ring, and simultaneously driving the pusher screw to rotate through the rotating shaft.

[0014] Preferably, the outer wall of the injection tube is fitted with multiple heaters, one end of the pusher screw is fitted with a backflow preventer valve, and the upper end of the base is provided with a guide plate located below the turntable; the heaters generate heat during use to heat the injection tube, and the heat is conducted into the conveyed plastic to heat the plastic, ensuring that the plastic melts and maintains its fluidity. At the same time, the backflow preventer valve prevents the pushed plastic liquid from flowing back, and the guide plate receives and guides the injection part that has left the fixed mold.

[0015] The operating steps for an automatic plastic injection molding device are as follows:

[0016] S1: The barrel conveys plastic granules into the injection tube. When the motor operates, it drives the push screw to rotate through the rotating shaft, pushing the plastic granules inside the injection tube. The plastic inside the injection tube is heated in stages after passing through multiple heaters. The hot-melt plastic enters the mold cavity closed by the moving mold and the fixed mold through the injection nozzle. The hot-melt plastic liquid fills the mold cavity and cools to form a plastic injection molded part.

[0017] S2: During mold opening, because the moving mold is fixed on one side of the turntable, it rotates with the side frame under the linkage, thus causing the moving mold and the fixed mold to be misaligned by rotation when the mold opens. At the same time, through the cooperation of spring two and cone plate one, when the moving mold rotates and separates from the fixed mold, the gradually decreasing thickness of the guide surface causes the side frame to be pulled towards the turntable by the elastic force of spring two, which in turn pulls the moving mold to move away from the fixed mold, thus realizing mold opening.

[0018] S3: During the rotation of the moving mold after injection molding, the next moving mold docks with the fixed mold. At this time, the moving mold is gradually subjected to extrusion force by the guide surface, which in turn pulls the corresponding spring two, causing the moving mold to move towards the fixed mold. The moving mold and the fixed mold are closed. During the mold opening process, the unused moving mold is directly transported to dock with the fixed mold, thus realizing the effective use of the injection structure during the mold opening process. The injection equipment makes full use of the mold opening time.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In this invention, the plastic is fed into the injection tube by a material barrel and pushed into the mold cavity inside the closed fixed mold and moving mold by the pusher screw. The plastic is then cooled and molded into a plastic injection molded part. The moving mold is elastically mounted on the side frame, which is distributed in a ring array on one side of the turntable. During the rotation of the turntable, the elastically supported moving mold is guided by a cone plate to automatically align with and detach from the fixed mold. After injection molding and demolding, the moving mold and the fixed mold are effectively connected, making reasonable use of the mold opening time and thus improving the injection molding efficiency of plastic products. Attached Figure Description

[0021] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a side view of the first angle of the three-dimensional structure of the present invention;

[0023] Figure 3 This is a side view of the second angle of the three-dimensional structure of the present invention;

[0024] Figure 4 This is a top view of the three-dimensional structure of the material cylinder of the present invention;

[0025] Figure 5 This is a side-view perspective three-dimensional structural diagram of the moving mold of the present invention;

[0026] Figure 6 This is a schematic diagram of the main cross-sectional three-dimensional structure of the connection between the injection tube and the barrel of the present invention;

[0027] Figure 7 This is a front-view three-dimensional structural diagram of the anti-backflow valve of the present invention;

[0028] Figure 8 This is a three-dimensional structural diagram of one side of the cone plate of the present invention;

[0029] Figure 9 This is a front-view three-dimensional structural diagram of the turntable of the present invention;

[0030] Figure 10 This is a side view perspective of the three-dimensional structure of the side plate of the present invention;

[0031] Figure 11 This is a top view of the three-dimensional structure of the cone plate of the present invention.

[0032] Reference numerals: 1. Base; 2. Turntable; 3. Guide plate; 4. Injection tube; 5. Heater; 6. Hydraulic rod; 7. Barrel; 8. Motor 1; 9. Machine sleeve; 10. Machine frame; 11. Ejector screw; 12. Fixed mold; 13. Support rod 1; 14. Conical plate 1; 15. Support rod 2; 16. Conical plate 2; 17. Guide rail; 18. Force plate; 19. Moving mold; 20. Side plate; 21. Sealing ring; 22. Injection nozzle; 23. Backflow preventer; 24. Connecting plate; 25. Motor 2; 26. Support column; 27. Ball bearing; 28. Guide rod; 29. ​​Spring 1; 30. Side frame; 31. Positioning seat; 32. Spring 2; 33. Sliding sleeve; 34. Guide surface; 35. Force ball bearing; 36. Stroke hole; 37. Ejector rod. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 11 The present invention provides four embodiments: Example 1:

[0035] An automatic plastic injection molding device includes a base 1, a turntable 2, an injection tube 4, a motor 8, a fixed mold 12, a moving mold 19, and a side frame 30. The upper end of the base 1 is provided with a frame 10, one end of which is provided with a motor 25. The output end of the motor 25 is provided with a turntable 2. The outer wall of the turntable 2 is provided with connecting plates 24 arranged in a ring array. The side frame 30 is provided on one side of the connecting plates 24. The moving mold 19 is provided on one side of the side frame 30. The injection tube 4 is provided on one side of the fixed mold 12. A material cylinder 7 is connected to one side of the upper end of the injection tube 4. A pusher screw 11 is rotatably installed inside the injection tube 4. The injection tube 4 and the fixed mold 12 are connected through an injection nozzle 22.

[0036] One end of the pusher screw 11 is connected to a motor 8. A sealing ring 21 is embedded inside the injection tube 4 and is slidably installed with the rotating shaft of the motor 8. A machine sleeve 9 is fitted on the outer wall of the motor 8. A hydraulic rod 6 with a telescopic end connected to the machine sleeve 9 is fixed on one side of the upper end of the base 1.

[0037] Multiple heaters 5 are sleeved on the outer wall of the injection tube 4, and a backflow preventer 23 is sleeved on the outer wall of one end of the pusher screw 11. A guide plate 3 located below the turntable 2 is provided on the upper end of the base 1.

[0038] The barrel 7 stores and conveys plastic granules into the injection molding machine, ensuring a certain supply. Motor 8 drives the rotating shaft to rotate, which in turn rotates the pusher screw 11. The pusher screw 11 rotates and pushes the molten plastic granules forward, delivering them to the injection nozzle 22. The injection tube 4 surrounds the pusher screw 11 and provides a heat source through the heater 5 to heat and melt the plastic granules before injecting them into the mold. The injection nozzle 22 is located at the injection port of the injection molding machine, connecting the injection tube 4 and the fixed mold 12, and is used to control the speed at which the molten plastic enters the mold. The mold part, fixed at one end of the injection tube 4, is used to fix the size and shape of the product. The size and shape of the moving mold 19 and the fixed mold 12 need to be adjusted according to the requirements. After the main power is turned on, the push screw 11 starts to rotate, which drives the plastic particles forward and heats and melts them in the injection tube 4. Once the required melt state is reached, the push screw 11 pressure pushes the molten plastic through the injection tube 4 into the injection nozzle, and finally fills the mold cavity between the fixed mold 12 and the moving mold 19. The hot melted plastic raw material cools and solidifies in the mold cavity to form a plastic injection molded part. Example 2:

[0039] The system includes a base 1, a turntable 2, an injection tube 4, a motor 8, a fixed mold 12, a moving mold 19, and a side frame 30. A frame 10 is installed on the upper end of the base 1. A motor 25 is installed at one end of the frame 10. A turntable 2 is installed at the output end of the motor 25. A connecting plate 24 arranged in a ring array is installed on the outer wall of the turntable 2. A side frame 30 is installed on one side of the connecting plate 24. A moving mold 19 is installed on one side of the side frame 30. An injection tube 4 is installed on one side of the fixed mold 12. A material cylinder 7 is connected to one side of the upper end of the injection tube 4. A pusher screw 11 is rotatably installed inside the injection tube 4. The injection tube 4 and the fixed mold 12 are connected through an injection nozzle 22.

[0040] One end of the pusher screw 11 is connected to a motor 8. A sealing ring 21 is embedded inside the injection tube 4 and is slidably installed with the rotating shaft of the motor 8. A machine sleeve 9 is fitted on the outer wall of the motor 8. A hydraulic rod 6 with a telescopic end connected to the machine sleeve 9 is fixed on one side of the upper end of the base 1.

[0041] Multiple heaters 5 are sleeved on the outer wall of the injection tube 4, and a backflow preventer 23 is sleeved on the outer wall of one end of the pusher screw 11. A guide plate 3 located below the turntable 2 is provided on the upper end of the base 1.

[0042] The barrel 7 stores and conveys plastic granules into the injection molding machine, ensuring a certain supply. Motor 8 drives the rotating shaft to rotate, which in turn rotates the pusher screw 11. The pusher screw 11 rotates and pushes the molten plastic granules forward, delivering them to the injection nozzle 22. The injection tube 4 surrounds the pusher screw 11 and provides a heat source through the heater 5 to heat and melt the plastic granules before injecting them into the mold. The injection nozzle 22 is located at the injection port of the injection molding machine, connecting the injection tube 4 and the fixed mold 12, and is used to control the speed at which the molten plastic enters the mold. The mold part, fixed at one end of the injection tube 4, is used to fix the size and shape of the product. The size and shape of the moving mold 19 and the fixed mold 12 need to be adjusted according to the requirements. After the main power is turned on, the push screw 11 starts to rotate, which drives the plastic particles forward and heats and melts them in the injection tube 4. Once the required melt state is reached, the push screw 11 pressure pushes the molten plastic through the injection tube 4 into the injection nozzle, and finally fills the mold cavity between the fixed mold 12 and the moving mold 19. The hot melted plastic raw material cools and solidifies in the mold cavity to form a plastic injection molded part.

[0043] A second spring 32 is provided between the side frame 30 and the connecting plate 24, a first spring 29 is provided between the moving mold 19 and the side frame 30, and a first cone plate 14 is provided on one side above the base 1;

[0044] One end of the turntable 2 is provided with support columns 26 arranged in a ring array. The outer wall of the frame 10 is fitted with a guide rail 17. The inner wall of the support column 26 is rotatably installed with ball bearings 27, which are rolled inside the guide rail 17.

[0045] A sliding sleeve 33 is embedded inside the connecting plate 24, and a guide rod 28 is provided at one end of the side frame 30, which is located inside the second spring 32 and slidably inserted into the sliding sleeve 33.

[0046] The side frame 30 is provided with symmetrically distributed positioning seats 31 at one end, and the cone plate 14 is provided with a support rod 13 connected to the frame 10 at one end.

[0047] After the plastic product is injection molded, motor 25 drives turntable 2 to rotate, which in turn drives the turntables 2 arranged in a ring array to rotate. During the rotation of turntable 2, the moving mold 19 in the injection process rotates. When the fixed mold 12 docks with the moving mold 19, it is supported by the positioning seat 31 at the thickest point of the cone plate 14, ensuring the precise docking of the fixed mold 12 and the moving mold 19. When the turntable 2 rotates and drives the moving mold 19 to rotate, the guiding surface 34 of the cone plate gradually releases the holding effect of the positioning seat 31. Through the elastic force of spring 2 32, the side frame 30 moves away from the fixed mold 12, so that the moving mold 19 gradually... As the moving mold 19 completely detaches from the cone plate 14, the opening of the moving mold 19 opens, realizing automatic mold opening. During the mold opening process, the unused moving mold 19 on one side will gradually apply extrusion force to the spring 32 through the guide surface 34 of the fixed cone plate 14, thereby causing the side frame 30 to move and drive the moving mold 19, which is about to dock with the fixed mold 12, to move towards the fixed mold 12, thus realizing the docking of the fixed mold 12 and the moving mold 19. During the mold opening process after the previous injection process is completed, the subsequent injection is carried out directly, so that the mold opening time is fully utilized.

[0048] It is worth noting that the anti-backflow valve 23 is a device located outside the pusher screw 11. The anti-backflow valve 23 is usually composed of a piston, an elastic element, and a valve body. By adding the anti-backflow valve 23 to the injection structure, the correct orientation of the plastic flow can be ensured during the plastic injection molding process, preventing the molten plastic from flowing backward during injection. When the hydraulic rod 6 drives the machine sleeve 9 to move, it drives the motor 8 to move, causing the piston to move, which in turn pushes the molten plastic material for injection. The molten plastic flows into the mold while maintaining a certain pressure to ensure the quality of filling and forming the product. The anti-backflow valve 23 helps to stabilize the injection process and reduce the scrap rate. Example 3:

[0049] The system includes a base 1, a turntable 2, an injection tube 4, a motor 8, a fixed mold 12, a moving mold 19, and a side frame 30. A frame 10 is installed on the upper end of the base 1. A motor 25 is installed at one end of the frame 10. A turntable 2 is installed at the output end of the motor 25. A connecting plate 24 arranged in a ring array is installed on the outer wall of the turntable 2. A side frame 30 is installed on one side of the connecting plate 24. A moving mold 19 is installed on one side of the side frame 30. An injection tube 4 is installed on one side of the fixed mold 12. A material cylinder 7 is connected to one side of the upper end of the injection tube 4. A pusher screw 11 is rotatably installed inside the injection tube 4. The injection tube 4 and the fixed mold 12 are connected through an injection nozzle 22.

[0050] One end of the pusher screw 11 is connected to a motor 8. A sealing ring 21 is embedded inside the injection tube 4 and is slidably installed with the rotating shaft of the motor 8. A machine sleeve 9 is fitted on the outer wall of the motor 8. A hydraulic rod 6 with a telescopic end connected to the machine sleeve 9 is fixed on one side of the upper end of the base 1.

[0051] Multiple heaters 5 are sleeved on the outer wall of the injection tube 4, and a backflow preventer 23 is sleeved on the outer wall of one end of the pusher screw 11. A guide plate 3 located below the turntable 2 is provided on the upper end of the base 1.

[0052] The barrel 7 stores and conveys plastic granules into the injection molding machine, ensuring a certain supply. Motor 8 drives the rotating shaft to rotate, which in turn rotates the pusher screw 11. The pusher screw 11 rotates and pushes the molten plastic granules forward, delivering them to the injection nozzle 22. The injection tube 4 surrounds the pusher screw 11 and provides a heat source through the heater 5 to heat and melt the plastic granules before injecting them into the mold. The injection nozzle 22 is located at the injection port of the injection molding machine, connecting the injection tube 4 and the fixed mold 12, and is used to control the speed at which the molten plastic enters the mold. The mold part, fixed at one end of the injection tube 4, is used to fix the size and shape of the product. The size and shape of the moving mold 19 and the fixed mold 12 need to be adjusted according to the requirements. After the main power is turned on, the push screw 11 starts to rotate, which drives the plastic particles forward and heats and melts them in the injection tube 4. Once the required melt state is reached, the push screw 11 pressure pushes the molten plastic through the injection tube 4 into the injection nozzle, and finally fills the mold cavity between the fixed mold 12 and the moving mold 19. The hot melted plastic raw material cools and solidifies in the mold cavity to form a plastic injection molded part.

[0053] A second spring 32 is provided between the side frame 30 and the connecting plate 24, a first spring 29 is provided between the moving mold 19 and the side frame 30, and a first cone plate 14 is provided on one side above the base 1;

[0054] One end of the turntable 2 is provided with support columns 26 arranged in a ring array. The outer wall of the frame 10 is fitted with a guide rail 17. The inner wall of the support column 26 is rotatably installed with ball bearings 27, which are rolled inside the guide rail 17.

[0055] A sliding sleeve 33 is embedded inside the connecting plate 24, and a guide rod 28 is provided at one end of the side frame 30, which is located inside the second spring 32 and slidably inserted into the sliding sleeve 33.

[0056] The side frame 30 is provided with symmetrically distributed positioning seats 31 at one end, and the cone plate 14 is provided with a support rod 13 connected to the frame 10 at one end.

[0057] After the plastic product is injection molded, motor 25 drives turntable 2 to rotate, which in turn drives the turntables 2 arranged in a ring array to rotate. During the rotation of turntable 2, the moving mold 19 in the injection process rotates. When the fixed mold 12 docks with the moving mold 19, it is supported by the positioning seat 31 at the thickest point of the cone plate 14, ensuring the precise docking of the fixed mold 12 and the moving mold 19. When the turntable 2 rotates and drives the moving mold 19 to rotate, the guiding surface 34 of the cone plate gradually releases the holding effect of the positioning seat 31. Through the elastic force of spring 2 32, the side frame 30 moves away from the fixed mold 12, so that the moving mold 19 gradually... As the moving mold 19 completely detaches from the cone plate 14, the opening of the moving mold 19 opens, realizing automatic mold opening. During the mold opening process, the unused moving mold 19 on one side will gradually apply extrusion force to the spring 32 through the guide surface 34 of the fixed cone plate 14, thereby causing the side frame 30 to move and drive the moving mold 19, which is about to dock with the fixed mold 12, to move towards the fixed mold 12, thus realizing the docking of the fixed mold 12 and the moving mold 19. During the mold opening process after the previous injection process is completed, the subsequent injection is carried out directly, so that the mold opening time is fully utilized.

[0058] It is worth noting that the anti-backflow valve 23 is a device located outside the pusher screw 11. The anti-backflow valve 23 is usually composed of a piston, an elastic element, and a valve body. By adding the anti-backflow valve 23 to the injection structure, the correct orientation of the plastic flow can be ensured during the plastic injection molding process, preventing the molten plastic from flowing backward during injection. When the hydraulic rod 6 drives the machine sleeve 9 to move, it drives the motor 8 to move, causing the piston to move, which in turn pushes the molten plastic material for injection. The molten plastic flows into the mold while maintaining a certain pressure to ensure the quality of filling and forming the product. The anti-backflow valve 23 helps to stabilize the injection process and reduce the scrap rate.

[0059] A support rod 2 15 is provided on one side above the base 1, and a cone plate 2 16 is provided at one end of the support rod 2 15;

[0060] Both cone plate 14 and cone plate 2 are provided with symmetrically distributed guide surfaces 34 on their outer walls, and the thickness of the guide surfaces 34 gradually increases from both sides toward the center.

[0061] A side plate 20 is provided on one side of the side frame 30. The side plate 20 is connected to the moving mold 19 by a spring 29. The moving mold 19 has a stroke hole 36 inside. A push rod 37 is provided at one end of the side plate 20, which is located inside the spring 29 and slides through the stroke hole 36.

[0062] A force-bearing plate 18 is provided on one side of the side plate 20. Symmetrically distributed force-bearing beads 35 are rotatably installed inside the force-bearing plate 18. The side plate 20 corresponds to the cone plate 16.

[0063] As the moving mold 19, opened after injection, passes through the cone plate 16 following the turntable 2, the force plate 18, through the force ball 35, presses against the guide surface 34 of the cone plate 16. The gradually changing thickness of the guide surface 34 causes the force plate 18 to move, thereby applying a compressive force to the spring 29. The spring 29 contracts under the force, and the force plate 18, under the force, drives the side plate 20 to move. The side plate 20 pushes the ejector rod 37 to move, causing the ejector rod 37 to move inside the moving mold 19. The injection part inside the moving mold 19 is ejected, and after the force ball 35 passes through the center of the cone plate 16, it gradually releases the pressure on the force plate 18. The side plate 20 gradually returns to its original position under the elastic force of the spring 29, which is conducive to subsequent blanking through the fixed mold 12, improving the ease of use of the injection part. Example 4:

[0064] The operating steps for an automatic plastic injection molding device are as follows:

[0065] S1: The barrel 7 conveys the plastic granules into the injection tube 4. The motor 8 drives the push screw 11 to rotate through the rotating shaft, pushing the plastic granules inside the injection tube 4. The plastic inside the injection tube 4 is heated in stages after passing through multiple heaters 5. The hot-melted plastic enters the mold cavity closed by the moving mold 19 and the fixed mold 12 through the injection nozzle. The hot-melted plastic liquid fills the mold cavity and cools to form a plastic injection molded part.

[0066] S2: During mold opening, because the moving mold 19 is fixed on one side of the turntable 2, it rotates with the side frame 30 under the linkage, which causes the moving mold 19 and the fixed mold 12 to be misaligned by rotation when the mold is opened. At the same time, through the cooperation of the second spring 32 and the first cone plate 14, when the moving mold 19 rotates away from the fixed mold 12, the gradually decreasing thickness of the guide surface 34 causes the side frame 30 to be pulled towards the turntable 2 by the elastic force of the second spring 32, which in turn pulls the moving mold 19 to move away from the fixed mold 12, thus realizing the mold opening.

[0067] S3: During the rotation of the moving mold 19 after injection molding, the next moving mold 19 docks with the fixed mold 12. At this time, the moving mold 19 is gradually subjected to extrusion force by the guide surface 34, which in turn causes the corresponding spring 32 to be pulled, causing the moving mold 19 to move towards the fixed mold 12. The moving mold 19 and the fixed mold 12 are closed. During the mold opening process, the unused moving mold 19 is directly transported to dock with the fixed mold 12, thereby realizing the effective use of the injection structure during the mold opening process. The time for mold opening is fully utilized during the use of the injection equipment.

[0068] The above specific embodiments are merely several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0069] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automatic plastic injection molding device, comprising a base (1), a turntable (2), an injection tube (4), a motor (8), a fixed mold (12), a moving mold (19), and a side frame (30), characterized in that: The base (1) is provided with a frame (10) at its upper end. A motor (25) is provided at one end of the frame (10). A turntable (2) is provided at the output end of the motor (25). A connecting plate (24) is arranged in a ring array on the outer wall of the turntable (2). A side frame (30) is provided on one side of the connecting plate (24). A moving mold (19) is provided on one side of the side frame (30). A spring (32) is provided between the side frame (30) and the connecting plate (24). A spring (29) is provided between the moving mold (19) and the side frame (30). A cone plate (14) is provided on one side above the base (1). An injection tube (4) is provided on one side of the fixed mold (12). The upper side of the injection tube (4) is connected to the material cylinder (7), and the injection tube (4) is rotatably installed with the push screw (11). The injection tube (4) and the fixed mold (12) are connected through the injection nozzle (22). The side frame (30) is provided with symmetrically distributed positioning seats (31) at one end, and the cone plate (14) is provided with a support rod (13) connected to the frame (10) at one end. The base (1) is provided with a support rod (25) on one side above it, and the support rod (25) is provided with a cone plate (26) at one end. The outer walls of the cone plate (14) and the cone plate (26) are provided with symmetrically distributed guide surfaces (34), and the thickness of the guide surfaces (34) gradually increases from both sides to the center.

2. The automatic plastic injection molding device according to claim 1, characterized in that: The connecting plate (24) has a sliding sleeve (33) embedded inside it, and one end of the side frame (30) is provided with a guide rod (28) located inside the second spring (32) and slidably inserted into the sliding sleeve (33).

3. The automatic plastic injection molding device according to claim 1, characterized in that: One end of the turntable (2) is provided with support columns (26) arranged in a ring array. The outer wall of the frame (10) is fitted with a guide rail (17). The inner wall of the support column (26) is rotatably installed with ball bearings (27), which are rolled inside the guide rail (17).

4. The automatic plastic injection molding device according to claim 1, characterized in that: A side plate (20) is provided on one side of the side frame (30). The side plate (20) is connected to the moving mold (19) by a spring (29). The moving mold (19) has a stroke hole (36) inside. One end of the side plate (20) is provided with a push rod (37) located inside the spring (29) and sliding through the stroke hole (36).

5. The automatic plastic injection molding device according to claim 4, characterized in that: A force-bearing plate (18) is provided on one side of the side plate (20), and symmetrically distributed force-bearing beads (35) are rotatably installed inside the force-bearing plate (18). The side plate (20) corresponds to the second cone plate (16).

6. The automatic plastic injection molding device according to claim 1, characterized in that: One end of the pusher screw (11) is connected to a motor (8), and a sealing ring (21) that is slidably installed with the rotating shaft of the motor (8) is embedded inside the injection tube (4). A machine sleeve (9) is fitted on the outer wall of the motor (8), and a hydraulic rod (6) with a telescopic end connected to the machine sleeve (9) is fixed on one side of the upper end of the base (1).

7. The automatic plastic injection molding device according to claim 1, characterized in that: The injection tube (4) is fitted with multiple heaters (5) on its outer wall, and a backflow preventer (23) is fitted on the outer wall of one end of the pusher screw (11). A guide plate (3) located below the turntable (2) is provided on the upper end of the base (1).

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