In-mold insert molding device and method for lightweight battery box of PPS composite material

Abstract

The application provides a PPS composite lightweight battery box in-mold insert forming device and method, and relates to the technical field of battery box forming. The PPS composite lightweight battery box in-mold insert forming device comprises an injection molding machine, a sliding rail and a mechanical arm. The sliding rail is located above the injection molding machine. The mechanical arm is slidingly arranged on the sliding rail. The end of the mechanical arm is rotatably provided with a back plate. The two end sidewalls of the back plate are fixedly provided with a plurality of rails. The sidewall of the side of the back plate facing the injection molding machine is movably provided with a plurality of movement plates. The flexible movement plates cooperate with the inner wall of the guide ring to make the insert flexible and automatically correct when the insert is connected with the positioning rod of the mold, so that rigid collision is avoided to prevent the insert from being stuck or the mold from being damaged. Meanwhile, the insert is smoothly sent into the mold cavity through the ejector rod and the flexible thin rod, so that the insert assembly precision, the in-mold insert stability and the integrated forming efficiency of the PPS composite lightweight battery box are improved.

Description

Technical Field

[0001] This invention belongs to the field of battery box molding technology, specifically relating to an in-mold embedding molding device and method for lightweight PPS composite battery boxes. Background Technology

[0002] PPS stands for polyphenylene sulfide, an engineering plastic with high temperature resistance, corrosion resistance, and strong dimensional stability. When made into composite materials, it is usually combined with materials such as glass fiber and carbon fiber to make it lighter, harder, and more heat-resistant. Compared with traditional metals, it can achieve a significant weight reduction of 30%–67% while maintaining or improving structural strength and fire resistance. Therefore, it has become one of the preferred materials for lightweighting battery packs in new energy vehicles. In-mold molding means that metal parts, connectors, reinforcements, inserts, nut seats, sensor mounting parts, etc. are placed in the mold in advance during molding, and then directly integrated with the PPS composite material during the molding process.

[0003] Similar to injection molding, in-mold insert molding is mostly carried out using horizontal injection molding machines. However, since some parts need to be inserted in advance, a robotic arm is added above the traditional horizontal injection molding machine to place the parts and remove the finished product. In the existing technology, when PPS composite lightweight battery box is in-mold inserted, metal inserts or functional inserts are usually placed in the mold cavity in advance and pre-positioned by structures such as slots, magnetic parts, and positioning pins.

[0004] During the production of the battery casing, dozens of nuts of varying sizes and specifications, as well as several metal pieces of different shapes and dimensions, may need to be pre-embedded simultaneously. When the robotic arm inserts these inserts into the high-temperature mold cavity, rigid collisions can easily occur. This is due to minute errors generated during long-term robot operation or thermal expansion of the mold, which can cause the inserts to jam and fail to be properly inserted into the locating pins. In more serious cases, this problem may further damage the mold, causing severe obstacles and losses to production. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a device and method for in-mold molding of lightweight battery box made of PPS composite material.

[0006] The technical solution adopted to solve the above technical problems is: A PPS composite lightweight battery box in-mold molding device includes an injection molding machine, a slide rail, and a robotic arm. The slide rail is located above the injection molding machine. The robotic arm is slidably mounted on the slide rail. A back plate is rotatably mounted at the end of the robotic arm. Several rails are fixedly mounted on the side walls at both ends of the back plate. Several moving plates are movably mounted on the side wall of the back plate facing the injection molding machine. The side walls of the moving plates abut against the side walls of the rails. A guide ring is fixedly mounted on the side wall of each moving plate. A ramp is provided on the inner wall of the guide ring. A placement hole is opened at the bottom of the guide ring, and an insert is installed in the placement hole. Each of the motion plates is fixedly equipped with a fixing rope at both the upper and lower ends. The back plate has several motion cavities, and the position of each motion cavity corresponds to the position of a motion plate. An electromagnet is installed in the motion cavity. Two coils are rotatably connected to the side wall of the motion cavity through two thin bearings. The fixing rope is wound around the coils. A central wheel is rotatably installed in the middle of the motion cavity. A push rod is threadedly connected inside the central wheel. A servo motor is installed in the motion cavity, and the output end of the servo motor is provided with an ejection mechanism for driving the ejector rod and the coil. A rotating wheel is fixedly installed at the bottom of the coil. Several slots are opened on the side wall of the rotating wheel. A locking rod is rotatably connected to the inner wall of the motion cavity. The locking rod is locked in the slot. A positioning mechanism for driving the locking rod is installed in the motion cavity.

[0007] Through the above technical solution, the movable moving plate, combined with the sliding slope of the inner wall of the guide ring, enables the insert to flexibly make way and automatically correct itself when docking with the mold positioning rod, avoiding rigid collisions that could cause the insert to jam or damage the mold. At the same time, the ejector rod and flexible thin rod smoothly deliver the insert into the mold cavity, improving the insert assembly accuracy, in-mold embedding stability, and the integrated molding efficiency of the PPS composite lightweight battery box.

[0008] Furthermore, a torsion spring is fixedly installed inside the coil, with one end of the torsion spring fixedly connected to the side wall of the motion cavity and the other end fixedly connected to the inner wall of the coil.

[0009] Through the above technical solution, the torsion spring, an elastic element, possesses unique mechanical properties. It can generate a restoring torque through its own torsional deformation. This property ensures that the connected coil maintains a strong tendency to rotate and reset. Under this continuous rotational tendency, the fixing rope remains taut and does not slack off. The moment the moving plate is released by the external mechanism, the taut fixing rope allows the moving plate to quickly return to its original position. This design not only ensures that the moving plate accurately returns to its initial standby position after each insert installation operation, guaranteeing the accuracy and stability of the entire workflow, but also creates extremely favorable conditions for the rapid adsorption and precise positioning of the next insert, greatly improving work efficiency and operational accuracy.

[0010] Furthermore, a ball bearing platform is provided on the side wall of the motion plate facing the back plate, and a flared opening is fixedly provided at the placement hole position, the height of the flared opening being less than the height of the ball bearing platform.

[0011] The ball bearing platform, ingeniously designed using the aforementioned technical solution, plays a crucial role between the moving plate and the back plate, effectively reducing frictional resistance. This allows the moving plate to displace more easily and smoothly when the positioning rod applies pressure, resulting in a remarkably fluid process. Simultaneously, the flared opening is also significant, precisely guiding the ejected rod. This guidance prevents direct friction between the rod and the edge of the placement hole during ejection. This design not only reduces rod wear but also greatly improves the smoothness of the ejection action, making the entire device more efficient and reliable.

[0012] Furthermore, the ejection mechanism includes a worm, a worm wheel, a rotating disk, and two connecting rods. The worm is fixedly mounted on the output end of the servo motor, the worm wheel is fixedly mounted on the side wall of the central wheel, the worm meshes with the worm wheel, the rotating disk is fixed on the top of the central wheel, and the two connecting rods are rotatably connected to the side walls at both ends of the rotating disk, with the ends of the two connecting rods away from the rotating disk being rotatably connected to the side walls of the two rotating wheels.

[0013] Through the above technical solution, the power output by the servo motor can be simultaneously transmitted to the central wheel and the two rotating wheels. When the servo motor starts working, it drives the ejector rod to eject outward while simultaneously driving the coil to rotate effectively. This rotation of the coil further relaxes the fixing rope, allowing the moving plate to have a certain amount of room to move under the corresponding action of the positioning rod. Through this power transmission and conversion process, the linkage between the insert correction action and the ejection action can be achieved, thereby greatly improving the coordination of the entire device during operation and making the cooperation between various components smoother and more efficient.

[0014] Furthermore, the inner wall of the center wheel is provided with internal threads, and the outer side of the ejector rod is provided with external threads. The ejector rod meshes with the inner wall of the center wheel, and the position of the ejector rod corresponds to the position of the placement hole. Several thin rods are fixedly provided at the end of the ejector rod away from the center wheel. The thin rods are made of rubber, and each thin rod passes through the side wall of the back plate.

[0015] Through the above technical solution, when the central wheel begins to rotate, it cleverly converts this rotational motion into the linear ejection motion of the ejector rod. Several thin rubber rods are specially designed at the end of the ejector rod. During operation, these rods make contact with the insert in a relatively gentle and gradual manner. This design primarily avoids scratches to the insert that might occur with a rigid ejector rod due to direct impact, and also prevents the insert from becoming misaligned or falling off. This ingenious design effectively improves the stability of the insert during its feeding into the mold, ensuring a more precise and reliable operation.

[0016] Furthermore, the thin rod includes a fixed section and a swing section. The fixed section is fixedly disposed at the end of the ejector rod, and the swing section is located at the end of the fixed section away from the ejector rod. The hardness of the fixed section is greater than that of the swing section.

[0017] Through the above technical solution, the fixed section possesses a stable characteristic, which effectively ensures that the thin rod has sufficient support strength. In this case, the thrust generated by the ejector rod can be stably transmitted through the thin rod, ensuring the stability of the entire structure during the stress process. Meanwhile, the relatively low-hardness swing section has a unique function: when it comes into contact with the insert, its low hardness allows it to undergo appropriate deformation. This deformation is not a negative consequence, but rather a positive adaptive change, enabling the swing section to better conform to the insert surface. The insert surface may often have some local deviations, and the deformation of the swing section can precisely adapt to these deviations, thereby further reducing the impact force during the ejection of the insert, making the entire ejection operation smoother and more stable.

[0018] Furthermore, the locking rod is L-shaped, with its short side engaged in the locking groove, and the position where the locking rod is rotatably connected to the side wall of the motion cavity is located at the middle of the long side of the locking rod.

[0019] The L-shaped locking lever, through the aforementioned technical solution, is ingeniously designed. Its short side not only securely engages with the slot, effectively limiting the rotation of the wheel and coil and ensuring their stability in specific positions, but also allows for rapid rotation and disengagement from the slot when the external drive mechanism is activated. This design makes the locking and unlocking actions of the entire device more reliable and flexible compared to other methods, demonstrating significant advantages in both ease of operation and functional stability. The L-shaped locking lever plays a crucial role in the operation of the mechanical structure, providing a solid guarantee for the normal operation of the entire system.

[0020] Furthermore, the positioning mechanism includes a slide rail, a slider, and an intermediate rod. The two ends of the intermediate rod are rotatably connected to the side walls of two locking rods, the slide rail is inclinedly disposed on the side wall of the motion cavity, the slider slides in the slide rail, and the thickness of the intermediate rod is consistent with the height of the slide rail.

[0021] Through the aforementioned technical solution, the positioning mechanism can drive the intermediate rod to move by changing the position of the slider in the slide rail. The movement of the intermediate rod then synchronously drives the two locking rods to perform corresponding actions. In this way, the device can automatically complete the locking or unlocking process regardless of the backplate's different orientations, completely eliminating the need for additional complex and costly control actuators. Therefore, this design approach greatly simplifies the overall structure while meeting functional requirements, making the entire device more concise, efficient, and easy to maintain, thereby effectively reducing manufacturing and usage costs while ensuring performance.

[0022] Furthermore, the slide is higher in the middle and lower on both sides, and the slider is magnetically connected to the middle rod.

[0023] Through the above technical solution, the slider can move stably to the predetermined position by gravity when the back plate posture changes, while the magnetic connection ensures that the slider and the intermediate rod can move synchronously, avoiding asynchronous action of the locking rod due to mechanical backlash, thereby improving the reliability of the positioning mechanism.

[0024] The method for in-mold embedding molding device of PPS composite lightweight battery box includes the following specific steps: S1. First, the robotic arm drives the backplate to a horizontal position, and the electromagnet pulls the insert into the placement hole. S2. Inside the back plate in a horizontal state, the slider moves along the slide to the middle position under the action of gravity. The middle rod is connected to the slider under the action of magnetic force, so that the two locking rods are locked in the slots. The positions of the two rotating wheels and the coil are fixed accordingly. The fixing rope wrapped around the coil also fixes the position of the moving plate, making it easy to suck in the insert. S3. The back panel will then enter a vertical position under the drive of the robotic arm, and the back panel will be brought to the injection molding machine position. S4. Inside the back plate in the vertical position, the slider will move to the bottom along the slide under the action of gravity. Since the middle rod is attracted to the slider, the two locking rods rotate. After the locking rods are released from the slots, the rotating wheel resumes its free rotation. S5. Drive the servo motor. The operation of the servo motor will cause the worm to rotate. The worm wheel meshing with it will drive the center wheel and the rotating disk to rotate. The two connecting rods that are rotatably connected to the side wall of the rotating disk will drive the two rotating wheels to rotate. Under the action of the torsion spring, the coil that tightens the fixing rope will rotate along with it, and the fixing rope will be relaxed. S6. After the positioning rod of the injection molding machine shifts from its initial position, the robotic arm drives the back plate to move towards the positioning rod. In the initial state, the positioning rod is aligned with the placement hole. After the positioning rod shifts, it presses against the guide ring, and the moving plate moves along with the guide ring until the positioning rod is reinserted into the insert. S7. The rotation of the center wheel will cause the ejector rod to be ejected towards the injection molding machine, and the thin rod will push the insert outward along the flared end, so that the insert enters the injection molding machine.

[0025] The beneficial effects of this invention are as follows: This invention provides a movable motion plate on the back plate, and a guide ring, placement hole, and fixed rope limiting structure on the motion plate. This allows the insert to be guided by the guide ring when it mates with the mold positioning rod, and then flexibly corrected by the displacement of the motion plate. This avoids the problems of rigid collision between the insert and the positioning rod in the prior art, which can cause jamming, misalignment, or even mold damage. This invention, by setting up an ejection mechanism driven by a servo motor, an ejection rod, and multiple thin rubber rods, can eject the insert from the placement hole and send it into the mold in a relatively gentle manner after the motion plate has completed the correction. This not only reduces the risk of the insert surface being scratched, deformed, or deviated, but also improves the accuracy and stability of in-mold insert molding. This invention, by setting a torsion spring inside the coil and a positioning mechanism consisting of a slider, a slide rail, an intermediate rod, and a locking rod in the motion cavity, enables the device to automatically lock and release according to the posture of the back plate. This ensures the stability of the moving plate position in the horizontal picking state and the ability of the moving plate to make way in the vertical assembly state, thereby improving the degree of automation and continuous production efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structural connection between the robotic arm and the back plate in this invention; Figure 3 This is a schematic diagram of the structural connection between the back plate and the motion plate in this invention; Figure 4 This is a schematic diagram of the back structure of the motion plate in this invention; Figure 5 This is a schematic diagram of the internal structure of the motion cavity in this invention; Figure 6 yes Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is a schematic diagram of the structural connection between the ejector rod and the center wheel in this invention; Figure 8 yes Figure 7 A magnified view of a section at point B in the middle.

[0027] Reference numerals: 1. Injection molding machine; 2. Slide rail; 3. Robotic arm; 4. Back plate; 5. Railing; 6. Motion plate; 7. Guide ring; 8. Slide ramp; 9. Placement hole; 10. Insert; 11. Fixing rope; 12. Electromagnet; 13. Coil; 14. Center wheel; 15. Ejector rod; 16. Servo motor; 17. Rotating wheel; 18. Slot; 19. Locking rod; 20. Torsion spring; 21. Ball bearing platform; 22. Trumpet mouth; 23. Worm gear; 24. Worm wheel; 25. Rotating disk; 26. Connecting rod; 27. Internal thread; 28. External thread; 29. ​​Fixed section; 30. Swing section; 31. Slide rail; 32. Slider; 33. Intermediate rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative and not intended to limit the invention.

[0029] like Figure 1 - Figure 3 As shown, the PPS composite lightweight battery box in-mold molding device in this embodiment includes an injection molding machine 1, a slide rail 2, and a robotic arm 3. The slide rail 2 is located above the injection molding machine 1, and the robotic arm 3 is slidably mounted on the slide rail 2. The robotic arm 3 can move along the slide rail 2 to complete actions such as picking up parts, feeding materials, and unloading materials. A back plate 4 is rotatably mounted at the end of the robotic arm 3. Several railings 5 ​​are fixedly mounted on the side walls at both ends of the back plate 4. Several moving plates 6 are movably mounted on the side wall of the back plate 4 facing the injection molding machine 1. The side walls of the moving plates 6 abut against the side walls of the railings 5. The railings 5 ​​can both limit the movement of the moving plates 6 and prevent the moving plates 6 from detaching from the back plate 4.

[0030] from Figure 3 As can be seen from the content, each moving plate 6 has a guide ring 7 fixedly installed on its side wall. The inner wall of the guide ring 7 is provided with a slope 8, and the bottom of the guide ring 7 has a placement hole 9, in which an insert 10 is installed. The slope 8 on the inner wall of the guide ring 7 is used to guide the positioning rod when there is a relative positional deviation between the insert 10 and the mold positioning rod, so that the positioning rod gradually slides to the correct position after contacting the guide ring 7, thereby avoiding rigid collision between the insert 10 and the positioning rod.

[0031] Reference Figure 3 and Figure 4 As can be seen from the content, a ball bearing platform 21 is provided on the side wall of the moving plate 6 facing the back plate 4, and a flared opening 22 is fixedly provided at the position of the placement hole 9. The height of the flared opening 22 is less than the height of the ball bearing platform 21. The ball bearing platform 21 can reduce the friction between the moving plate 6 and the back plate 4, so that the moving plate 6 can move more smoothly when subjected to external force; the flared opening 22 can guide the subsequently ejected thin rod, so that the thin rod is less likely to interfere with the hole wall when passing through the back plate 4, thus improving the stability of the ejection action.

[0032] like Figure 4 , Figure 5 and Figure 6As shown in the figure, fixing ropes 11 are respectively fixedly arranged at the upper and lower ends of each moving plate 6, a plurality of moving cavities are opened in the back plate 4, and the position of each moving cavity corresponds to the position of one moving plate 6. An electromagnet 12 is arranged in the moving cavity, two coils 13 are respectively rotatably connected to the side wall of the moving cavity through two thin bearings, the fixing ropes 11 are wound around the coils 13, a central wheel 14 is rotatably arranged at the middle position of the moving cavity, and an ejection rod 15 is threadedly connected inside the central wheel 14. The electromagnet 12 can adsorb the metal insert 10 when the back plate 4 is in a horizontal state, so that the insert 10 stably stays in the placement hole 9, which facilitates the handling by the mechanical arm 3.

[0033] A torsion spring 20 is fixedly arranged inside the coil 13, one end of the torsion spring 20 is fixedly connected with the side wall of the moving cavity, and the other end is fixedly connected with the inner wall of the coil 13. The arrangement of the torsion spring 20 enables the coil 13 to always maintain a rotation reset trend, so that the fixing rope 11 maintains a tensioned state, ensuring the position stability of the moving plate 6 in the initial state.

[0034] A servo motor 16 is arranged in the moving cavity, and an output end of the servo motor 16 is provided with an ejection mechanism for driving the ejection rod 15 and the coil 13. The ejection mechanism comprises a worm 23, a worm wheel 24, a rotating disk 25 and two connecting rods 26, the worm 23 is fixedly arranged at the output end of the servo motor 16, the worm wheel 24 is fixedly arranged on the side wall of the central wheel 14, the worm 23 meshes with the worm wheel 24, the rotating disk 25 is fixedly arranged at the top of the central wheel 14, the two connecting rods 26 are respectively rotatably connected with the side walls at both ends of the rotating disk 25, and the ends of the two connecting rods 26 away from the rotating disk 25 are respectively rotatably connected with the side walls of two rotating wheels 17. Through the above arrangement, when the servo motor 16 works, on one hand, it can drive the central wheel 14 to rotate through the worm 23 and the worm wheel 24, and on the other hand, it can drive the two rotating wheels 17 to rotate synchronously through the rotating disk 25 and the connecting rods 26, so as to realize the linkage control of the ejection rod 15 and the coil 13.

[0035] With reference to Figure 7 and Figure 8 it can be known from the contents that, an inner thread 27 is formed on the inner wall of the central wheel 14, an outer thread 28 is formed outside the ejection rod 15, the ejection rod 15 meshes with the inner wall of the central wheel 14, the position of the ejection rod 15 corresponds to the position of the placement hole 9, a plurality of thin rods are fixedly arranged at the end of the ejection rod 15 away from the central wheel 14, each thin rod passes through the side wall of the back plate 4, and the thin rods are made of rubber. The thin rod comprises a fixed section 29 and a swinging section 30, the fixed section 29 is fixedly arranged at the end of the ejection rod 15, the swinging section 30 is located at the end of the fixed section 29 away from the ejection rod 15, and the hardness of the fixed section 29 is greater than that of the swinging section 30. Therefore, when the ejection rod 15 moves forward, a plurality of thin rods can contact the insert 10 at the same time, so that the stress is more uniform, and the swinging section 30 can produce moderate deformation, thereby reducing the hard impact on the insert 10.

[0036] Combined with references Figure 5 and Figure 6 As can be seen from the content, a rotating wheel 17 is fixedly installed at the bottom of the coil 13. Several slots 18 are opened on the side wall of the rotating wheel 17. A locking rod 19 is rotatably connected to the inner wall of the motion cavity. The locking rod 19 is engaged in the slot 18. The locking rod 19 is L-shaped, with its short side engaged in the slot 18. The position where the locking rod 19 is rotatably connected to the side wall of the motion cavity is at the middle of its long side. When the short side of the locking rod 19 is engaged in the slot 18, the rotating wheel 17 and the coil 13 are locked, keeping the fixing rope 11 in its current state, thereby fixing the position of the motion plate 6.

[0037] The motion cavity is also equipped with a positioning mechanism for driving the locking levers 19. The positioning mechanism includes a slide rail 31, a slider 32, and a middle rod 33. The two ends of the middle rod 33 are rotatably connected to the side walls of the two locking levers 19, respectively. The slide rail 31 is inclinedly set on the side wall of the motion cavity. The slider 32 slides in the slide rail 31. The thickness of the middle rod 33 is the same as the height of the slide rail 31. The slide rail 31 is higher in the middle and lower on both sides. The slider 32 and the middle rod 33 are magnetically connected. By changing the position of the slider 32 in the slide rail 31, the middle rod 33 can drive the two locking levers 19 to rotate synchronously, thereby automatically locking or unlocking according to the posture change of the back plate 4.

[0038] The method for in-mold embedding molding device of PPS composite lightweight battery box includes the following specific steps: S1. First, the robotic arm 3 drives the back plate 4 to a horizontal state, and the electromagnet 12 pulls the insert 10 into the placement hole 9. S2. Inside the back plate 4 in a horizontal state, the slider 32 moves to the middle position along the slide 31 under the action of gravity. The middle rod 33 is connected to the slider 32 under the action of magnetic force, so that the two locking rods 19 are locked in the locking groove 18. The positions of the two rotating wheels 17 and the coil 13 are fixed accordingly. The fixing rope 11 wrapped around the coil 13 also fixes the position of the moving plate 6, making it convenient to suck in the insert 10. S3, and then the back plate 4 will enter the vertical state under the drive of the robotic arm 3, and the back plate 4 will be brought to the position of the injection molding machine 1; S4. Inside the back plate 4 in the vertical position, the slider 32 will move to the bottom along the slide 31 under the action of gravity. Since the middle rod 33 is attracted to the slider 32, the two locking rods 19 rotate. After the locking rods 19 are disengaged from the slots 18, the rotating wheel 17 resumes its freedom of rotation. S5. Drive the servo motor 16. The operation of the servo motor 16 will cause the worm 23 to rotate. The worm wheel 24 meshing with it will drive the center wheel 14 and the rotating disk 25 to rotate. The two connecting rods 26 rotatably connected to the side wall of the rotating disk 25 will drive the two rotating wheels 17 to rotate. Under the action of the torsion spring 20, the coil 13 that tightens the fixing rope 11 will rotate along with it, and the fixing rope 11 will be relaxed. S6. After the positioning rod of the injection molding machine 1 is offset from its initial position, the robotic arm 3 drives the back plate 4 to move towards the positioning rod. In the initial state, the positioning rod is aligned with the placement hole 9. After the positioning rod is offset, it presses the guide ring 7, and the moving plate 6 will also move with the guide ring 7 until the positioning rod is re-inserted into the insert 10. S7. The rotation of the center wheel 14 will cause the ejector rod 15 to be ejected towards the injection molding machine 1, and the thin rod will push the insert 10 outward along the flared mouth 22, so that the insert 10 enters the injection molding machine 1.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A PPS composite lightweight battery box in-mold molding device, comprising an injection molding machine (1), a slide rail (2), and a robotic arm (3), wherein the slide rail (2) is located above the injection molding machine (1), and the robotic arm (3) is slidably mounted on the slide rail (2), characterized in that: The end of the robotic arm (3) is rotatably provided with a back plate (4), and several railings (5) are fixedly provided on the side walls at both ends of the back plate (4). Several moving plates (6) are movably provided on the side wall of the back plate (4) facing the injection molding machine (1). The side wall of the moving plate (6) abuts against the side wall of the railing (5). Each side wall of the moving plate (6) is fixedly provided with a guide ring (7). The inner wall of the guide ring (7) is provided with a slope (8). The bottom of the guide ring (7) is provided with a placement hole (9). An insert (10) is installed in the placement hole (9). Each of the motion plates (6) is fixed with a fixing rope (11) at both the upper and lower ends. The back plate (4) has several motion cavities. The position of each motion cavity corresponds to the position of a motion plate (6). An electromagnet (12) is installed in each motion cavity. Two coils (13) are rotatably connected to the side wall of the motion cavity through two thin bearings. The fixing rope (11) is wound around the coils (13). A center wheel (14) is rotatably installed in the middle of the motion cavity. A push rod (15) is threaded inside the center wheel (14). A servo motor (16) is provided in the motion cavity, and the output end of the servo motor (16) is provided with an ejection mechanism for driving the ejector rod (15) and the coil (13). A rotating wheel (17) is fixedly installed at the bottom of the coil (13). Several slots (18) are opened on the side wall of the rotating wheel (17). A locking rod (19) is rotatably connected to the inner wall of the motion cavity. The locking rod (19) is locked in the slot (18). A positioning mechanism for driving the locking rod (19) is installed in the motion cavity. The positioning mechanism includes a slide (31), a slider (32) and an intermediate rod (33). The two ends of the intermediate rod (33) are rotatably connected to the side walls of the two locking rods (19). The slide (31) is inclinedly installed on the side wall of the motion cavity. The slider (32) slides in the slide (31). The thickness of the intermediate rod (33) is the same as the height of the slide (31). The slide (31) is high in the middle and low on both sides, and the slider (32) is magnetically connected to the middle rod (33).

2. The PPS composite lightweight battery box in-mold embedding molding device according to claim 1, characterized in that, A torsion spring (20) is fixedly installed inside the coil (13). One end of the torsion spring (20) is fixedly connected to the side wall of the motion cavity, and the other end is fixedly connected to the inner wall of the coil (13).

3. The PPS composite lightweight battery box in-mold embedding molding device according to claim 2, characterized in that, The motion plate (6) has a ball bearing platform (21) on the side wall facing the back plate (4), and a flared mouth (22) is fixedly provided at the position of the placement hole (9). The height of the flared mouth (22) is less than the height of the ball bearing platform (21).

4. The PPS composite lightweight battery box in-mold embedding molding device according to claim 3, characterized in that, The ejection mechanism includes a worm (23), a worm wheel (24), a rotating disk (25), and two connecting rods (26). The worm (23) is fixedly mounted on the output end of the servo motor (16), the worm wheel (24) is fixedly mounted on the side wall of the center wheel (14), the worm (23) meshes with the worm wheel (24), the rotating disk (25) is fixed on the top of the center wheel (14), the two connecting rods (26) are rotatably connected to the side walls of both ends of the rotating disk (25), and the ends of the two connecting rods (26) away from the rotating disk (25) are rotatably connected to the side walls of the two rotating wheels (17).

5. The PPS composite lightweight battery box in-mold embedding molding device according to claim 4, characterized in that, The inner wall of the center wheel (14) is provided with an internal thread (27), and the outer side of the ejector rod (15) is provided with an external thread (28). The ejector rod (15) meshes with the inner wall of the center wheel (14). The position of the ejector rod (15) corresponds to the position of the placement hole (9). Several thin rods are fixedly provided at the end of the ejector rod (15) away from the center wheel (14). The thin rods are made of rubber, and each thin rod passes through the side wall of the back plate (4).

6. The PPS composite lightweight battery box in-mold embedding molding device according to claim 5, characterized in that, The thin rod includes a fixed section (29) and a swing section (30). The fixed section (29) is fixedly disposed at the end of the ejector rod (15). The swing section (30) is located at the end of the fixed section (29) away from the ejector rod (15). The hardness of the fixed section (29) is greater than that of the swing section (30).

7. The PPS composite lightweight battery box in-mold embedding molding device according to claim 5, characterized in that, The clamp (19) is L-shaped, with its short side engaged in the groove (18), and the position where the clamp (19) is rotatably connected to the side wall of the motion cavity is in the middle of the long side of the clamp (19).

8. A molding method for a PPS composite lightweight battery box in-mold inlay molding device, as described in claim 1, characterized in that... The specific steps include the following: S1. First, the robotic arm (3) drives the back plate (4) to a horizontal position, and the electromagnet (12) sucks the insert (10) into the placement hole (9); S2. Inside the back plate (4) in a horizontal state, the slider (32) moves to the middle position along the slide (31) under the action of gravity. The middle rod (33) is connected to the slider (32) under the action of magnetic force, so that the two locking rods (19) are locked in the slot (18). The positions of the two rotating wheels (17) and the coil (13) are fixed accordingly. The fixing rope (11) wrapped around the coil (13) also fixes the position of the moving plate (6) to facilitate the suction of the insert (10). S3, and then the back plate (4) will enter the vertical state under the drive of the robotic arm (3), and the back plate (4) will be brought to the position of the injection molding machine (1); S4. Inside the back plate (4) in the vertical state, the slider (32) will move to the bottom along the slide (31) under the action of gravity. Since the middle rod (33) and the slider (32) are attracted together, the two locking rods (19) will rotate. After the locking rods (19) are disengaged from the slots (18), the rotating wheel (17) will regain its freedom of rotation. S5. Drive the servo motor (16). The operation of the servo motor (16) will cause the worm (23) to rotate. The worm wheel (24) meshing with it will drive the center wheel (14) and the rotating disk (25) to rotate. The two connecting rods (26) rotatably connected to the side wall of the rotating disk (25) will drive the two rotating wheels (17) to rotate. Under the action of the torsion spring (20), the coil (13) that tightens the fixing rope (11) will rotate along with it, and the fixing rope (11) will be relaxed. S6. After the positioning rod of the injection molding machine (1) shifts from its initial position, the robotic arm (3) drives the back plate (4) to move towards the positioning rod. In the initial state, the positioning rod is aligned with the placement hole (9). After the positioning rod shifts, it squeezes the guide ring (7), and the moving plate (6) will also move along with the guide ring (7) until the positioning rod is re-inserted into the insert (10). S7. The rotation of the center wheel (14) will cause the ejector rod (15) to be ejected towards the injection molding machine (1), and the thin rod will eject the insert (10) outward along the flared mouth (22), so that the insert (10) enters the injection molding machine (1).

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