Automatic plastic injection molding device

Abstract

The invention relates to the technical field of injection molding processing, in particular to an automatic plastic injection molding device. According to the technical scheme, the injection molding machine comprises a base, a rotating disc, an injection pipe, a first motor, a fixed mold, a movable mold and a side frame, a rack is arranged at the upper end of the base, a second motor is arranged at one end of the rack, the rotating disc is arranged at the output end of the second motor, a connecting plate is arranged on the outer wall of a rotating shaft, the side frame is arranged on one side of the connecting plate, and the movable mold is arranged on one side of the side frame. A second spring is arranged between the side frame and the connecting plate, a first spring is arranged between the movable mold and the side frame, a first conical plate is arranged on one side of the upper portion of the base, an injection pipe is arranged on one side of the fixed mold, a material barrel is installed on one side of the upper end of the injection pipe in a communicating mode, and a material pushing screw rod is rotationally installed in the injection pipe. The movable mold and the fixed mold which are distributed in an annular array are matched for use, the mold opening time is reasonably utilized, efficient use of the injection structure is achieved, and the injection machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to an automatic plastic injection molding device. Background Art

[0002] Polyurethane elastomer is also called polyurethane rubber. Thermoplastic polyurethane rubber is cross-linked by hydrogen bonds between molecules or light cross-linked between macromolecular chains. These two cross-linked structures are reversible as the temperature rises or falls. The horizontal plastic automatic injection molding device is a device used for the production of plastic products, including an injection device and a mold, in which plastic particles are input into the injection machine through the feed port, the plastic particles are heated and melted in the injection machine, and then the molten plastic is injected into the mold through the high-pressure injection system, and taken out after cooling and hardening to form a plastic product. The horizontal plastic automatic injection molding device is widely used in the production of plastic products, such as plastic parts, containers, components, toys, etc.

[0003] The plastic injection molding mold includes a movable mold and a fixed mold. The hot melt plastic liquid is injected into the mold cavity inside the mold and then cooled and molded. During the mold opening process, the injection structure cannot be used, and the intermittent mold opening time cannot be fully utilized, thereby reducing the injection molding efficiency of the plastic product. Therefore, those skilled in the art provide a plastic automatic injection molding device to solve the problems raised in the above background technology. Summary of the invention

[0004] The purpose of the present invention is to provide a plastic automatic injection molding device in view of the problems existing in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a plastic automatic injection molding device, comprising a base, a turntable, an injection tube, a motor 1, a fixed mold, a movable mold and a side frame, wherein a frame is arranged on the upper end of the base, a motor 2 is arranged at one end of the frame, a turntable is arranged at the output end of the motor 2, a connecting plate distributed in a ring array is arranged on the outer wall of the turntable, a side frame is arranged on one side of the connecting plate, a movable mold is arranged on one side of the side frame, a spring 2 is arranged between the side frame and the connecting plate, a spring 1 is arranged between the movable mold and the side frame, a cone plate 1 is arranged on one side above the base, an injection tube is arranged on one side of the fixed mold, a barrel is installed on one side of the upper end of the injection tube, a push screw is rotatably installed inside the injection tube, and the injection tube is connected to the fixed mold through an injection nozzle.

[0006] Preferably, a sliding sleeve is embedded and installed inside the connecting plate, and a guide rod is provided at one end of the side frame, which is located inside the second spring and slidably inserted inside the sliding sleeve. During the extension and retraction process of the second spring, the guide rod slides inside the sliding sleeve to guide the second spring during the extension and retraction process, thereby preventing the second spring from deviating outward, so that the second spring can be stably extended and retracted laterally, providing a sliding guide for the moving side frame.

[0007] Preferably, one end of the side frame is provided with a symmetrically distributed positioning seat, and one end of the cone plate is provided with a support rod one connected to the frame. The positioning seat is used to dock with the cone plate one at the maximum thickness position, and the cone plate one exerts a stable extrusion force on the guide frame because it docks with the positioning seat. The support rod one supports the cone plate one and is fixed on one side above the base.

[0008] Preferably, a support rod 2 is provided on one side above the base, and a cone plate 2 is provided at one end of the support rod 2. The cone plate 2 is supported by the support rod 2, so that the cone plate 2 is fixed to one side of the upper end of the base, and the cone plate 2 is fixed to the outer side of the movable mold during use.

[0009] Preferably, the outer walls of the cone plate 1 and the cone plate 2 are both provided with symmetrically distributed guiding surfaces, and the thickness of the guiding surfaces gradually increases from both sides to the center. Through the guiding surfaces, the cone plate 1 gradually applies an extrusion force to the passing positioning seat, and the cone plate 2 gradually applies an extrusion force to the passing force plate, and because the guiding surfaces are symmetrically distributed, the same positioning seat gradually ends the extrusion force due to the decreasing thickness after being gradually extruded, and the same force plate gradually ends the extrusion force due to the decreasing thickness after being gradually extruded.

[0010] Preferably, one end of the turntable is provided with support columns distributed in a circular array, the outer wall of the frame is sleeved with a guide rail, the inner wall of the support column is rotatably mounted with a ball, and the ball is rollingly mounted inside the guide rail. During the rotation of the turntable, the support column is driven to rotate synchronously, and the ball moves inside the guide rail to provide rolling support for the rotating support column, thereby providing rotational support for the turntable, and the stability of the turntable is improved during rotation.

[0011] Preferably, a side plate is provided on one side of the side frame, the side plate is connected to the movable mold via a spring 1, a travel hole is provided inside the movable mold, and a push rod is provided at one end of the side plate, which is located inside the spring 1 and slides through the travel hole. The side plate is supported on one end of the side frame by the elastic force of the spring 1, and the push rod moves inside the spring 1 and inside the travel hole, so that the spring 1 is guided by sliding during the expansion and contraction process, and the spring 1 is prevented from deviating outward during the expansion and contraction process. During the expansion and contraction process of the spring 1, the push rod is driven to eject the injection molded part remaining inside the movable mold through the travel hole, which is used for the blanking of 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, and the side plate corresponds to the second cone plate. When the force-bearing plate passes through the second cone plate, the force-bearing beads contact the second cone plate, thereby reducing the resistance of the force-bearing plate, and the force-bearing plate passes more smoothly during use.

[0013] Preferably, one end of the push screw is connected to a motor 1, a sealing ring is embedded in the injection tube and slidably mounted with the rotating shaft of the motor 1, the outer wall of the motor 1 is sleeved with a machine sleeve, 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 output end of the motor 1 acts on the inside of the sealing ring through the rotating shaft, and rotates inside the sealing ring, while driving the push screw to rotate through the rotating shaft.

[0014] Preferably, the outer wall of the injection tube is sleeved with multiple heaters, the outer wall of one end of the pushing screw is sleeved with a non-return valve, and the upper end of the base is provided with a guide plate located below the turntable; the heater generates heat to heat the injection tube during use, and the heat is conducted to the transported plastic to heat the plastic, ensuring that the hot melt of the plastic maintains fluidity, and at the same time the non-return valve prevents the pushed plastic liquid from flowing back, and the guide plate takes over the guidance of the injection part that has separated from the fixed mold.

[0015] The steps for using the plastic automatic injection molding device are as follows:

[0016] S1: The barrel conveys the plastic particles and inputs them into the injection tube. When the motor is running, the push screw is driven to rotate through the rotating shaft to push the plastic particles inside the injection tube. The plastic inside the injection tube is heated in sections after passing through multiple heaters. The hot melt plastic enters the closed mold cavity of the movable 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: When opening the mold, because the movable mold is fixed on one side of the turntable, it rotates with the movable mold under the linkage of the side frame, so that the movable mold and the fixed mold are staggered by rotation when the mold is opened. At the same time, through the cooperation of the second spring and the first cone plate, when the movable mold rotates away from the movable mold, the gradually decreasing thickness of the guide surface causes the side frame to be acted upon by the elastic force of the second spring, pulling the side frame to move toward the turntable, and then pulling the movable mold to move, driving the movable mold away from the fixed mold, thereby realizing mold opening;

[0018] S3: During the rotation of the movable mold after the injection molding process, the next movable mold is docked with the fixed mold. At this time, the movable mold is gradually subjected to extrusion force by the guide surface, so that the corresponding spring 2 is pulled, so that the movable mold moves toward the fixed mold, and the movable mold and the fixed mold are closed. During the mold opening process, the unused movable mold is directly transported to the fixed mold for docking, thereby realizing the effective use of the injection structure during the mold opening process, and making full use of the mold opening time during the use of the injection equipment.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The barrel of the present invention conveys plastic into the injection tube, and under the push of the pushing screw, the plastic enters the mold cavity inside the closed fixed mold and the movable mold, and is cooled and molded into a plastic injection molded part. The movable mold is elastically mounted on the side frame, and the side frame is distributed in a ring array on one side of the turntable. During the rotation of the turntable, the elastically supported movable mold automatically corresponds to and is separated from the fixed mold through the guidance of the cone plate. After the injection molding and demolding, the subsequent movable mold is effectively docked with the fixed mold, which reasonably utilizes the mold opening time, thereby improving the injection molding processing efficiency of the plastic product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention;

[0022] Figure 2 It is a schematic diagram of a three-dimensional structure of the present invention viewed from a side at a first angle;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention viewed from a side at a second angle;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the barrel of the present invention from top view;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the movable mold of the present invention from a side view;

[0026] Figure 6 It 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 It is a schematic diagram of the front three-dimensional structure of the anti-return valve of the present invention;

[0028] Figure 8 A schematic diagram of a three-dimensional structure of a cone plate from one side of the present invention;

[0029] Fig. 9 It is a schematic diagram of the main three-dimensional structure of the turntable of the present invention;

[0030] Fig.10 It is a schematic diagram of the three-dimensional structure of the side panel of the present invention from a side view;

[0031] Fig.11 It is a schematic diagram of a top view of a three-dimensional structure of a cone plate of the present invention.

[0032] 1. Base; 2. Turntable; 3. Guide plate; 4. Injection tube; 5. Heater; 6. Hydraulic rod; 7. Cylinder; 8. Motor 1; 9. Machine cover; 10. Frame; 11. Push screw; 12. Fixed mold; 13. Support rod 1; 14. Cone plate 1; 15. Support rod 2; 16. Cone plate 2; 17. Guide rail; 18. Force plate; 19. Moving mold; 20. Side plate; 21. Sealing ring; 22. Injection nozzle; 23. Check valve; 24. Connecting plate; 25. Motor 2; 26. Support column; 27. Ball; 28. Guide rod; 29. ​​Spring 1; 30. Side frame; 31. Positioning seat; 32. Spring 2; 33. Sliding sleeve; 34. Guide surface; 35. Force ball; 36. Travel hole; 37. Push rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 11 , the present invention provides four embodiments:

[0035] Embodiment 1:

[0036] A plastic automatic injection molding device, comprising a base 1, a turntable 2, an injection tube 4, a motor 18, a fixed mold 12, a movable mold 19 and a side frame 30, wherein a frame 10 is arranged on the upper end of the base 1, a motor 25 is arranged on one end of the frame 10, a turntable 2 is arranged on the output end of the motor 25, a connecting plate 24 distributed in a ring array is arranged on the outer wall of the turntable 2, a side frame 30 is arranged on one side of the connecting plate 24, a movable mold 19 is arranged on one side of the side frame 30, an injection tube 4 is arranged on one side of the fixed mold 12, a barrel 7 is connected to one side of the upper end of the injection tube 4, a push screw 11 is rotatably installed inside the injection tube 4, and the injection tube 4 is connected to the fixed mold 12 through an injection nozzle 22;

[0037] One end of the pushing screw 11 is connected to a motor 8, a sealing ring 21 is embedded in the injection tube 4 and slidably installed with the rotating shaft of the motor 8, the outer wall of the motor 8 is sleeved with a machine sleeve 9, 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.

[0038] The outer wall of the injection tube 4 is sleeved with a plurality of heaters 5, the outer wall of one end of the pushing screw 11 is sleeved with a non-return valve 23, and the upper end of the base 1 is provided with a guide plate 3 located below the turntable 2;

[0039] The barrel 7 stores and conveys the plastic particles to the injection molding machine. It is necessary to ensure that a certain supply amount is maintained. The motor 8 drives the rotating shaft to rotate, driving the push screw 11 to rotate. The push screw 11 rotates and pushes the molten plastic particles forward to the injection nozzle 22. The injection tube 4 wraps the push screw 11 and provides a heating source through the heater 5, which is used to heat and melt the plastic particles and inject 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 product size and shape. The size and shape of the movable mold 19 and the fixed mold 12 need to be adjusted according to the needs. After the main power is turned on, the push screw 11 starts to rotate, driving the plastic particles to move forward and heat and melt 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 movable mold 19. The hot-melt plastic raw material is cooled and formed in the mold cavity to form a plastic injection molded part.

[0040] Embodiment 2:

[0041] It includes a base 1, a turntable 2, an injection tube 4, a motor 18, a fixed mold 12, a movable mold 19 and a side frame 30. The upper end of the base 1 is provided with a frame 10, one end of the frame 10 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 distributed in a ring array, one side of the connecting plate 24 is provided with a side frame 30, one side of the side frame 30 is provided with a movable mold 19, one side of the fixed mold 12 is provided with an injection tube 4, one side of the upper end of the injection tube 4 is connected with a barrel 7, a push screw 11 is rotatably installed inside the injection tube 4, and the injection tube 4 is connected with the fixed mold 12 through an injection nozzle 22;

[0042] One end of the pushing screw 11 is connected to a motor 8, a sealing ring 21 is embedded in the injection tube 4 and slidably installed with the rotating shaft of the motor 8, the outer wall of the motor 8 is sleeved with a machine sleeve 9, 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.

[0043] The outer wall of the injection tube 4 is sleeved with a plurality of heaters 5, the outer wall of one end of the pushing screw 11 is sleeved with a non-return valve 23, and the upper end of the base 1 is provided with a guide plate 3 located below the turntable 2;

[0044] The barrel 7 stores and conveys the plastic particles to the injection molding machine. It is necessary to ensure that a certain supply amount is maintained. The motor 8 drives the rotating shaft to rotate, driving the push screw 11 to rotate. The push screw 11 rotates and pushes the molten plastic particles forward to the injection nozzle 22. The injection tube 4 wraps the push screw 11 and provides a heating source through the heater 5, which is used to heat and melt the plastic particles and inject 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 product size and shape. The size and shape of the movable mold 19 and the fixed mold 12 need to be adjusted according to the needs. After the main power is turned on, the push screw 11 starts to rotate, driving the plastic particles to move forward and heat and melt 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 movable mold 19. The hot-melt plastic raw material is cooled and formed in the mold cavity to form a plastic injection molded part.

[0045] A spring 2 32 is provided between the side frame 30 and the connecting plate 24, a spring 1 29 is provided between the movable mold 19 and the side frame 30, and a cone plate 14 is provided on one side above the base 1;

[0046] One end of the turntable 2 is provided with support columns 26 distributed in a circular array, the outer wall of the frame 10 is sleeved with a guide rail 17, and the inner wall of the support column 26 is rotatably mounted with a ball 27, and the ball 27 is rollingly mounted inside the guide rail 17;

[0047] A sliding sleeve 33 is embedded and installed 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 spring 2 32 and is slidably inserted into the sliding sleeve 33;

[0048] A symmetrically distributed positioning seat 31 is provided at one end of the side frame 30, and a support rod 13 connected to the frame 10 is provided at one end of the cone plate 14;

[0049] After the plastic product is injection molded, the motor 25 drives the turntable 2 to rotate, and then drives the turntables 2 distributed in a circular array to rotate. During the rotation of the turntable 2, the fixed mold 12 in the injection process is driven to rotate. When the fixed mold 12 is docked with the movable mold 19, it is supported by the positioning seat 31 at the maximum thickness of the cone plate 14 to ensure the precise docking of the fixed mold 12 and the movable mold 19. When the turntable 2 rotates and drives the fixed mold 12 to rotate, the guiding surface 34 of the cone plate gradually releases the effect of the positioning seat 31 being held, and the elastic force of the spring 2 32 causes the side frame 30 to move away from the fixed mold 12, so that the fixed mold 12 is gradually Gradually open, when the fixed mold 12 is completely separated from the cone plate 14, the opening of the fixed mold 12 is opened, realizing the automatic mold opening of the mold. During the mold opening process, the unused fixed mold 12 on one side will gradually apply extrusion force to the spring 2 32 through the fixed cone plate 14 and the guide surface 34 of the cone plate 14, thereby moving the side frame 30, driving the movable mold 19 that is about to dock with the fixed mold 12 to move toward the fixed mold 12, thereby realizing the docking of the fixed mold 12 and the movable mold 19. During the process of mold opening after the previous injection process, the subsequent injection molding is directly carried out, so that the mold opening time is fully utilized;

[0050] It is worth mentioning that the non-return valve 23 is a device located on the outside of the push screw 11. The non-return valve 23 is usually composed of a piston, an elastic member and a valve body. By adding the non-return valve 23 to the injection structure, the correct orientation of the plastic flow direction can be ensured during the plastic injection molding process to prevent the molten plastic from flowing in the opposite direction during the injection process. The hydraulic rod 6 drives the machine sleeve 9 to move, which drives the motor 8 to move, so that the piston moves, and then the plastic liquid for injection is pushed, and the molten plastic flows into the mold while maintaining a certain pressure to ensure the quality of filling and forming the product. The non-return valve 23 helps to stabilize the injection process and reduce the scrap rate.

[0051] Embodiment three:

[0052] It includes a base 1, a turntable 2, an injection tube 4, a motor 18, a fixed mold 12, a movable mold 19 and a side frame 30. The upper end of the base 1 is provided with a frame 10, one end of the frame 10 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 distributed in a ring array, one side of the connecting plate 24 is provided with a side frame 30, one side of the side frame 30 is provided with a movable mold 19, one side of the fixed mold 12 is provided with an injection tube 4, one side of the upper end of the injection tube 4 is connected with a barrel 7, a push screw 11 is rotatably installed inside the injection tube 4, and the injection tube 4 is connected with the fixed mold 12 through an injection nozzle 22;

[0053] One end of the pushing screw 11 is connected to a motor 8, a sealing ring 21 is embedded in the injection tube 4 and slidably installed with the rotating shaft of the motor 8, the outer wall of the motor 8 is sleeved with a machine sleeve 9, 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.

[0054] The outer wall of the injection tube 4 is sleeved with a plurality of heaters 5, the outer wall of one end of the pushing screw 11 is sleeved with a non-return valve 23, and the upper end of the base 1 is provided with a guide plate 3 located below the turntable 2;

[0055] The barrel 7 stores and conveys the plastic particles to the injection molding machine. It is necessary to ensure that a certain supply amount is maintained. The motor 8 drives the rotating shaft to rotate, driving the push screw 11 to rotate. The push screw 11 rotates and pushes the molten plastic particles forward to the injection nozzle 22. The injection tube 4 wraps the push screw 11 and provides a heating source through the heater 5, which is used to heat and melt the plastic particles and inject 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 product size and shape. The size and shape of the movable mold 19 and the fixed mold 12 need to be adjusted according to the needs. After the main power is turned on, the push screw 11 starts to rotate, driving the plastic particles to move forward and heat and melt 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 movable mold 19. The hot-melt plastic raw material is cooled and formed in the mold cavity to form a plastic injection molded part.

[0056] A spring 2 32 is provided between the side frame 30 and the connecting plate 24, a spring 1 29 is provided between the movable mold 19 and the side frame 30, and a cone plate 14 is provided on one side above the base 1;

[0057] One end of the turntable 2 is provided with support columns 26 distributed in a circular array, the outer wall of the frame 10 is sleeved with a guide rail 17, and the inner wall of the support column 26 is rotatably mounted with a ball 27, and the ball 27 is rollingly mounted inside the guide rail 17;

[0058] A sliding sleeve 33 is embedded and installed 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 spring 2 32 and is slidably inserted into the sliding sleeve 33;

[0059] A symmetrically distributed positioning seat 31 is provided at one end of the side frame 30, and a support rod 13 connected to the frame 10 is provided at one end of the cone plate 14;

[0060] After the plastic product is injection molded, the motor 25 drives the turntable 2 to rotate, and then drives the turntables 2 distributed in a circular array to rotate. During the rotation of the turntable 2, the fixed mold 12 in the injection process is driven to rotate. When the fixed mold 12 is docked with the movable mold 19, it is supported by the positioning seat 31 at the maximum thickness of the cone plate 14 to ensure the precise docking of the fixed mold 12 and the movable mold 19. When the turntable 2 rotates and drives the fixed mold 12 to rotate, the guiding surface 34 of the cone plate gradually releases the effect of the positioning seat 31 being held, and the elastic force of the spring 2 32 causes the side frame 30 to move away from the fixed mold 12, so that the fixed mold 12 is gradually Gradually open, when the fixed mold 12 is completely separated from the cone plate 14, the opening of the fixed mold 12 is opened, realizing the automatic mold opening of the mold. During the mold opening process, the unused fixed mold 12 on one side will gradually apply extrusion force to the spring 2 32 through the fixed cone plate 14 and the guide surface 34 of the cone plate 14, thereby moving the side frame 30, driving the movable mold 19 that is about to dock with the fixed mold 12 to move toward the fixed mold 12, thereby realizing the docking of the fixed mold 12 and the movable mold 19. During the process of mold opening after the previous injection process, the subsequent injection molding is directly carried out, so that the mold opening time is fully utilized;

[0061] It is worth mentioning that the non-return valve 23 is a device located on the outside of the push screw 11. The non-return valve 23 is usually composed of a piston, an elastic member and a valve body. By adding the non-return valve 23 to the injection structure, the correct orientation of the plastic flow direction can be ensured during the plastic injection molding process to prevent the molten plastic from flowing in the opposite direction during the injection process. The hydraulic rod 6 drives the machine sleeve 9 to move, which drives the motor 8 to move, so that the piston moves, and then the plastic liquid for injection is pushed, and the molten plastic flows into the mold while maintaining a certain pressure to ensure the quality of filling and forming the product. The non-return valve 23 helps to stabilize the injection process and reduce the scrap rate.

[0062] A second support rod 15 is provided on one side above the base 1, and a second cone plate 16 is provided at one end of the second support rod 15;

[0063] The outer walls of the cone plate 14 and the cone plate 2 16 are both provided with symmetrically distributed guide surfaces 34, and the thickness of the guide surfaces 34 gradually increases from both sides to the center position;

[0064] A side plate 20 is provided on one side of the side frame 30, and the side plate 20 is connected to the movable mold 19 via a spring 29, a travel hole 36 is provided inside the movable mold 19, and 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 travel hole 36;

[0065] 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, and the side plate 20 corresponds to the cone plate 2 16;

[0066] When the movable mold 19 opened after injection follows the turntable 2 through the cone plate 16, the force plate 18 squeezes the guide surface 34 of the cone plate 16 through the force bead 35. The thickness of the guide surface 34 gradually changes, so that the force plate 18 moves, and then applies an extrusion force to the spring 29. The spring 29 contracts under the force, and the force plate 18 drives the side plate 20 to move after being forced. The side plate 20 pushes the ejector rod 37 to move, and the ejector rod 37 moves inside the movable mold 19, and the injection part inside the movable mold 19 is ejected. After the force bead 35 passes through the center of the cone plate 16, the extrusion of the force plate 18 is gradually released, and the side plate 20 is gradually reset by the elastic force support of the spring 29, so that the subsequent material unloading process through the fixed mold 12 is carried out, and the convenience of using the injection part is improved.

[0067] Embodiment 4:

[0068] The steps for using the plastic automatic injection molding device are as follows:

[0069] S1: The barrel 7 conveys the plastic particles and inputs them into the injection tube 4. The motor 8 drives the push screw 11 to rotate through the rotating shaft to push the plastic particles inside the injection tube 4. The plastic inside the injection tube 4 is heated in sections after passing through multiple heaters 5. The hot melt plastic enters the mold cavity closed by the movable mold 19 and the fixed mold 12 through the injection nozzle. The hot melt plastic liquid fills the mold cavity and cools to form a plastic injection molded part.

[0070] S2: When opening the mold, because the movable mold 19 is fixed on one side of the turntable 2, the side frame 30 rotates with the movable mold 19 under the linkage, so that the movable mold 19 and the fixed mold 12 are staggered 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 movable mold 19 rotates away from the movable mold 19, the gradually decreasing thickness of the guide surface 34 causes the side frame 30 to be acted upon by the elastic force of the second spring 32, and the side frame 30 is pulled to move toward the turntable 2, and then the movable mold 19 is pulled to move, driving the movable mold 19 away from the fixed mold 12, thereby realizing the mold opening;

[0071] S3: During the rotation of the movable mold 19 after the injection molding process, the next movable mold 19 is docked with the fixed mold 12. At this time, the movable mold 19 is gradually exerted with extrusion force by the guide surface 34, so that the corresponding spring 2 32 is pulled, so that the movable mold 19 moves toward the fixed mold 12, and the movable mold 19 and the fixed mold 12 are closed. During the mold opening process, the unused movable 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, and fully utilizing the mold opening time during the use of the injection equipment.

[0072] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0073] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A plastic automatic injection molding device, comprising a base (1), a turntable (2), an injection tube (4), a motor (8), a fixed mold (12), a movable mold (19) and a side frame (30), characterized in that: A frame (10) is provided at the upper end of the base (1), a second motor (25) is provided at one end of the frame (10), a turntable (2) is provided at the output end of the second motor (25), an outer wall of the turntable (2) is provided with connecting plates (24) distributed in a ring array, a side frame (30) is provided at one side of the connecting plate (24), a movable mold (19) is provided at one side of the side frame (30), a second spring (32) is provided between the side frame (30) and the connecting plate (24), a first spring (29) is provided between the movable mold (19) and the side frame (30), a cone plate (14) is provided at one side of the upper end of the base (1), an injection tube (4) is provided at one side of the fixed mold (12), a barrel (7) is connected to one side of the upper end of the injection tube (4), a push screw (11) is rotatably installed inside the injection tube (4), and the injection tube (4) is connected to the fixed mold (12) via an injection nozzle (22).

2. A plastic automatic injection molding device according to claim 1, characterized in that: A sliding sleeve (33) is embedded and installed inside the connecting plate (24), and a guide rod (28) is provided at one end of the side frame (30) and is located inside the second spring (32) and is 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 side frame (30) is provided with symmetrically distributed positioning seats (31), and one end of the cone plate (14) is provided with a support rod (13) connected to the frame (10).

4. The automatic plastic injection molding device according to claim 1, characterized in that: A second support rod (15) is provided on one side above the base (1), and a second cone plate (16) is provided at one end of the second support rod (15).

5. The automatic plastic injection molding device according to claim 4, characterized in that: The outer walls of the cone plate 1 (14) and the cone plate 2 (16) are both provided with symmetrically distributed guide surfaces (34), and the thickness of the guide surfaces (34) gradually increases from both sides to the center.

6. 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) distributed in a ring array, the outer wall of the frame (10) is sleeved with a guide rail (17), the inner wall of the support column (26) is rotatably mounted with a ball (27), and the ball (27) is rollingly mounted inside the guide rail (17).

7. 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), and the side plate (20) is connected to the movable mold (19) via a spring 1 (29). A travel hole (36) is provided inside the movable mold (19), and a push rod (37) is provided at one end of the side plate (20), which is located inside the spring 1 (29) and slides through the travel hole (36).

8. The automatic plastic injection molding device according to claim 7, 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 mounted inside the force-bearing plate (18), and the side plate (20) corresponds to the second cone plate (16).

9. The automatic plastic injection molding device according to claim 1, characterized in that: One end of the push screw (11) is connected to a motor (8); a sealing ring (21) is embedded in the injection tube (4) and slidably mounted on the rotating shaft of the motor (8); an outer wall of the motor (8) is sleeved with a machine sleeve (9); and a hydraulic rod (6) having a telescopic end connected to the machine sleeve (9) is fixedly disposed on one side of the upper end of the base (1).

10. The automatic plastic injection molding device according to claim 1, characterized in that: The outer wall of the injection tube (4) is sleeved with a plurality of heaters (5), the outer wall of one end of the push screw (11) is sleeved with a non-return valve (23), and the upper end of the base (1) is provided with a guide plate (3) located below the turntable (2); The steps for using the plastic automatic injection molding device are as follows: S1: The barrel (7) conveys the plastic particles and inputs them into the injection tube (4). The motor 1 (8) operates to drive the push screw (11) to rotate through the rotating shaft to push the plastic particles inside the injection tube (4). The plastic inside the injection tube (4) is heated in sections after passing through multiple heaters (5). The hot melt plastic enters the closed mold cavity of the movable mold (19) and the fixed mold (12) through the injection nozzle. The hot melt plastic liquid fills the mold cavity and is cooled to form a plastic injection molded part. S2: When the mold is opened, because the movable mold (19) is fixed on one side of the turntable (2), it rotates with the movable mold (19) under the linkage of the side frame (30), so that the movable mold (19) and the fixed mold (12) are displaced 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 movable mold (19) rotates away from the movable mold (19), the gradually decreasing thickness of the guide surface (34) causes the side frame (30) to be acted upon by the elastic force of the second spring (32), and pull the side frame (30) toward the turntable (2), thereby pulling the movable mold (19) to move, driving the movable mold (19) away from the fixed mold (12), and thus realizing the mold opening; S3: During the rotation of the movable mold (19) after the injection molding process, the next movable mold (19) is docked with the fixed mold (12). At this time, the movable mold (19) is gradually exerted with an extrusion force by the guide surface (34), thereby causing the corresponding spring 2 (32) to be pulled, so that the movable mold (19) moves toward the fixed mold (12), and the movable mold (19) and the fixed mold (12) are closed. During the mold opening process, the unused movable 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, and fully utilizing the mold opening time during the use of the injection equipment.

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