Injection molding equipment and injection molding process for seat guard plate of new energy vehicle

Abstract

The present application relates to an injection molding device and an injection molding process for a seat guard plate of a new energy vehicle, and relates to the technical field of injection molding equipment. The device includes a barrel, a discharge pipe and a discharge pump. A stirring shaft with a stirring rod is provided inside the barrel. The stirring shaft and the stirring rod are provided with mutually interconnected return channels. The discharge pipe is connected to the return pipe through a three-way valve, so that the raw material can circulate when not in injection molding. In addition, the top of the barrel is open and a top cover is provided. The return channel in the stirring shaft is fixed with fan blades, and the angle of the fan blades can be controlled by an adjusting rod to ensure uniform mixing of the materials. The stirring rod is designed to be flat and have different thicknesses at both ends, which helps to improve the fluidity of the material. Through reasonable structural design, this equipment effectively improves the uniformity and production efficiency of the raw materials and reduces waste, and is suitable for high-quality injection molding production of seat guard plates for new energy vehicles.

Description

Technical Field

[0001] The present application relates to the technical field of injection molding equipment, and in particular to an injection molding equipment and an injection molding process for a seat guard plate of a new energy vehicle. Background Art

[0002] Injection molding machines are indispensable and important equipment in modern manufacturing, and are widely used in many industries such as automobiles, home appliances, and electronics. Especially in the new energy vehicle industry, with the popularization of electric vehicles and technological progress, the demand for high-quality and high-precision parts is growing. Injection molding machines heat thermoplastics or thermosetting plastics and inject them into molds to form various complex plastic products, greatly improving production efficiency and product quality.

[0003] In existing injection molding technology, a common method is to set a stirring device inside the barrel to improve the mixing uniformity of the raw materials. Specifically, these stirring devices usually include a rotating shaft with stirring blades, which are driven by a motor to rotate the stirring shaft so that the raw materials are fully mixed inside the barrel. In addition, some improved methods also include adding guide plates or multi-stage stirring mechanisms inside the barrel to enhance the fluidity of the raw materials. However, although these conventional methods can improve the mixing effect of the raw materials to a certain extent, they still have obvious limitations.

[0004] Although the above methods can improve the mixing uniformity of raw materials to a certain extent, they generally have the problem of not being able to effectively promote the flow of materials between different layers in the barrel. Especially for large injection molded parts such as seat guards for new energy vehicles, it is difficult to achieve sufficient mixing of raw materials between the upper and lower layers in the barrel during long processing, resulting in unstable quality of the finished product. This problem not only affects the performance of the product, but may also cause an increase in the scrap rate and increase production costs. Summary of the invention

[0005] In order to improve the fluidity between the layers of raw materials in the barrel, the present application provides an injection molding device and an injection molding process for a seat guard plate of a new energy vehicle.

[0006] In the first aspect, the present application provides an injection molding device and an injection molding process for a seat guard plate of a new energy vehicle, which adopts the following technical solutions: An injection molding device for a seat guard plate of a new energy vehicle comprises a barrel, the barrel is provided with a discharge pipe, a discharge pump is provided between the barrel and the discharge pipe, a stirring shaft is provided inside the barrel, a stirring rod is provided on the side wall of the stirring shaft, return channels that are interconnected are provided inside the stirring shaft and the stirring rod, the end of the stirring rod away from the stirring shaft is inclined downward, the discharge pipe is connected to a return pipe, a three-way valve is provided at the connection between the discharge pipe and the return pipe, and the return pipe is connected to the return channel.

[0007] By adopting the above technical solution, effective circulation and uniform mixing of raw materials inside the barrel are achieved. Specifically: The inclined design of the stirring rod allows the raw materials to be transported downward along the edge of the inner wall of the barrel when being pumped back into the barrel, and finally transported upward from the middle position of the bottom of the barrel, forming a complete circulation path.

[0008] The design of the return channel ensures that the raw materials can flow smoothly between the stirring shaft and the stirring rod, improves the fluidity between the layers of raw materials, and avoids the problem of poor fluidity between the upper and lower layers of raw materials in traditional stirring methods.

[0009] The application of the three-way valve enables the circulation of raw materials to be maintained during the non-injection molding discharge stage (such as the cooling process), thus improving the flexibility and adaptability of the equipment.

[0010] The design of the entire system not only enhances the uniformity of raw materials, but also reduces product quality problems caused by uneven distribution of raw materials.

[0011] Preferably, the top of the barrel is open and provided with a top cover, the stirring shaft is rotatably connected to the top cover, and a fan blade is fixedly provided inside the return channel in the stirring shaft.

[0012] By adopting the above technical solution, the top of the barrel is open and provided with a top cover, the stirring shaft is rotatably connected to the top cover, and the return channel in the stirring shaft is fixedly provided with fan blades. When the raw material is pumped to the fan blades, the high-speed circulating raw material will exert force on the fan blades, thereby realizing the automatic rotation of the stirring shaft and stirring rod driven by the fan blades, without the need to add additional driving elements, thereby improving the overall efficiency and economy of the equipment. At the same time, this design enables the stirring shaft and stirring rod to maintain continuous rotation during the injection molding process, further improving the mixing uniformity of the raw materials inside the barrel and ensuring the stability of the quality of the finished product.

[0013] Preferably, the fan blade is connected to an adjusting rod, the stirring shaft is penetrated by an adjusting hole, the adjusting rod passes through the adjusting hole and can rotate around the axis of the adjusting hole, the adjusting rod sleeve is provided with an adjusting bolt, and the adjusting bolt abuts against the outer wall of the stirring shaft.

[0014] By adopting the above technical solution, the cooperation between the adjusting rod and the stirring shaft realizes the flexible adjustment of the blade angle. Specifically, when the angle of the blade needs to be changed, the adjusting bolt can be loosened so that the adjusting rod can rotate freely in the adjusting hole, thereby adjusting the position and angle of the blade. This design not only improves the operational flexibility of the equipment, but also optimizes the stirring effect under different working conditions, and improves the uniformity and fluidity of the raw materials inside the barrel. At the same time, tightening the adjusting bolt again after the adjustment is completed can ensure that the angle of the blade remains unchanged, thereby ensuring the stability of the equipment operation.

[0015] Preferably, the number of the fan blades is more than one pair and several fan blades are evenly distributed along the circumference of the return channel, the fan blades are connected to a driven gear, the stirring shaft is rotatably connected to a driving gear, the driving gear is kneaded with several of the driven gears, the driving gear is connected to an active rod, and the active rod extends out of the stirring shaft and the top cover.

[0016] By adopting the above technical solution, multiple blades are evenly distributed along the circumference of the return channel, ensuring that the raw materials are subjected to a balanced force when flowing through each blade, thereby effectively improving the rotation stability of the stirring shaft. At the same time, through the meshing transmission of the driven gear and the driving gear, all blades can be adjusted synchronously by simply turning the active rod, which is not only more convenient to operate, but also ensures that the relative angle relationship between the blades is more stable and accurate, further improving the stirring effect.

[0017] Preferably, the return channel in the stirring rod is provided with a plurality of return openings, and the plurality of return openings are evenly distributed along the length direction of the stirring rod and the opening directions of adjacent return openings are opposite.

[0018] By adopting the above technical solution, a number of return ports are evenly distributed along the length of the stirring rod and the opening directions of adjacent return ports are opposite, which can produce a multi-point and multi-directional turbulence effect when the raw materials pass through the stirring rod, further improving the mixing uniformity and fluidity of the raw materials inside the barrel. Specifically, each return port can generate a driving force on the raw materials in a local area, so that the raw materials can be more fully exchanged between different heights and positions, thereby avoiding the problem of uneven mixing caused by flow in a single direction. At the same time, the opening directions of adjacent return ports are opposite, so that the raw materials are subjected to alternating forces in different directions, which enhances the overall turbulence effect and improves the dispersion and uniformity of the raw materials in the entire barrel.

[0019] Preferably, the stirring rod is rotationally connected to the stirring shaft, and the stirring rod and the stirring shaft are connected to each other through a flexible connecting pipe to achieve communication between the return channels inside the stirring rod and the stirring shaft.

[0020] By adopting the above technical solution, the stirring rod and the stirring shaft are connected to each other through a flexible connecting tube. When the raw material is pumped into the return channel, the connecting tube is filled and hardened, so that the stirring rod is lifted; when the raw material is discharged from the discharge pipe, the connecting tube becomes soft, so that the stirring rod falls back. This periodic lifting and falling action makes the stirring rod disturb the raw materials in various places more comprehensively, and the disturbance mode is different from the circumferential disturbance of the traditional stirring rod, but the swing disturbance, thereby effectively improving the mixing uniformity of the raw materials inside the barrel.

[0021] Preferably, the outer edge profile of the cross section of the stirring rod is flat and the thickness of the end portion in the width direction is smaller than the thickness in the middle.

[0022] By adopting the above technical solution, the cross-section of the stirring rod is designed to be flat and the thickness of the end in the width direction is smaller than the thickness in the middle, so that the resistance of the stirring rod during the rotation inside the barrel is smaller, which is more conducive to the raw materials pushing the fan blades and the stirring shaft and the stirring rod to rotate as a whole.

[0023] Preferably, the stirring shaft is connected to a supporting shaft, and one end of the supporting shaft away from the stirring shaft abuts against the stirring rod to support the stirring rod.

[0024] By adopting the above technical solution, the cooperation between the support shaft and the stirring rod ensures the stability of the stirring rod's position inside the barrel, avoids excessive swinging caused by the flow of raw materials, and enables the stirring rod to maintain a stable turbulence effect under different working conditions. At the same time, the support of the support shaft on the stirring rod also limits the maximum swing amplitude of the stirring rod, preventing it from colliding with the inner wall of the barrel and causing damage. This design not only improves the reliability of equipment operation, but also extends the service life of the stirring rod and the entire injection molding equipment.

[0025] Preferably, a guide boss is provided in the middle of the bottom wall of the barrel, a reflux zone is formed between the guide boss and the inner wall of the barrel, and the discharge direction of the reflux channel inside the stirring rod points to the reflux zone.

[0026] By adopting the above-mentioned technical scheme, the reflux zone formed between the guide boss and the inner wall of the barrel can effectively guide the raw materials discharged from the reflux channel inside the stirring rod to flow to a specific area, so that the raw materials are transported upward from the middle position of the bottom of the barrel, thereby promoting the effective circulation of the raw materials inside and outside the barrel and between the layers, and improving the mixing uniformity of the raw materials.

[0027] In the second aspect, the present application provides an injection molding process for a seat guard plate of a new energy vehicle, which adopts the following technical solution: An injection molding process for a new energy vehicle seat guard plate based on an injection molding device, in which a discharge pump is used to pump the raw material inside a barrel to a discharge pipe for injection molding and discharging during normal discharging, and when injection molding and discharging are not required, for example, during the cooling process after the guard plate is injected and the demolding process, a three-way valve can be used to adjust the raw material to be pumped from the discharge pump to a return pipe, and finally to flow back to the barrel from a return channel inside a stirring shaft and a stirring rod, and the raw material is continuously conveyed toward the edge of the inner wall of the barrel and obliquely conveyed downward under the action of the angle of the stirring rod, and finally to be conveyed upward from the middle position of the bottom of the barrel to complete the cycle, so that the raw material inside the barrel can be effectively circulated inside, outside and between layers, thereby improving the uniformity of the raw material.

[0028] By adopting the above technical solution, this design enables the raw materials inside the barrel to flow effectively inside, outside and between layers, which significantly improves the uniformity of the raw materials.

[0029] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the return channel inside the stirring shaft and stirring rod, and using the three-way valve to adjust the flow direction of the raw materials, the raw materials form a circulating flow path in the barrel, which effectively improves the fluidity and uniformity between the layers of raw materials in the barrel.

[0030] 2. The stirring rod is tilted downward, and combined with the guide boss at the bottom of the barrel, it realizes the continuous transportation of raw materials from the edge of the inner wall of the barrel to the central area, further enhancing the mixing effect of the raw materials in the entire barrel.

[0031] 3. During the normal discharging process, the discharging pump is used to transport the raw materials to the discharging pipe for injection molding. During the non-injection molding stage (such as the cooling process), the three-way valve can be used to switch to the reflux mode, avoiding the problem of raw material stratification during the stop period of the traditional injection molding machine and ensuring the stability of the entire production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application; Figure 2 This is a structural schematic diagram for illustrating the connection relationship between the stirring shaft and the stirring rod in the embodiment of the present application; Figure 3 It is a structural schematic diagram used to illustrate the connection relationship between the fan blades and the stirring shaft in the embodiment of the present application.

[0033] In the figure: 1. Cylinder; 11. Discharge pump; 12. Discharge pipe; 13. Three-way valve; 14. Return pipe; 15. Top cover; 16. Return channel; 17. Guide boss; 18. Reflux area; 2. stirring shaft; 21. stirring rod; 210. return port; 22. connecting pipe; 23. supporting shaft; 3. Fan blade; 31. Driven gear; 32. Driving gear; 33. Driving rod; 34. Adjusting rod; 35. Adjusting hole; 36. Adjusting bolt. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0035] The inventor of the present application discovered that the injection molding machines in the related art usually have a barrel for heating and storing molten plastic. In order to improve the uniform heating of the raw materials inside the barrel, a stirring shaft is usually set inside the barrel to stir the raw materials. However, the above-mentioned related art has the following defects: during the stirring process, stirring can usually only be performed at the height of the stirring blade, and the fluidity between the raw materials between the upper and lower layers is poor, so it needs to be improved. To this end, the present application mainly adopts the following injection molding equipment and injection molding process for the seat guard plate of a new energy vehicle, which achieves the effect of improving the fluidity between the layers of raw materials in the barrel, thereby significantly improving the uniformity of the raw materials. The present application is further described in detail below.

[0036] Reference Figure 1 The injection molding equipment for the seat guard plate of a new energy vehicle provided in the present application includes a barrel 1, a discharge pump 11, a discharge pipe 12, a three-way valve 13, a stirring shaft 2 and a stirring rod 21. Among them, the discharge pipe 12 is arranged at the bottom edge of the barrel 1, and the discharge pump 11 is arranged at the connection between the barrel 1 and the discharge pipe 12. The discharge pipe 12 is also connected to a return pipe 14, and the three-way valve 13 is arranged at the connection between the discharge pipe 12 and the return pipe 14 to control whether the raw material is transported toward the rear section of the discharge pipe 12 or toward the return pipe 14 when the discharge pump 11 is continuously working, and the top of the return pipe 14 is reconnected to the inside of the barrel 1.

[0037] The stirring shaft 2 is located inside the barrel 1 and is rotatably connected to the top cover 15 at the top opening of the barrel 1. The stirring rod 21 is rotatably connected to the side wall of the stirring shaft 2. The stirring shaft 2 and the stirring rod 21 are both provided with mutually connected return channels 16, and a flexible connecting pipe 22 is provided at the connection between the stirring shaft 2 and the stirring rod 21. The connection of the return channels 16 in each of them is achieved through the flexible connecting pipe 22. When the raw material is pumped into the return channel 16, the connecting pipe 22 is filled and hardened, thereby achieving the lifting of the stirring rod 21. When the raw material is discharged from the discharge pipe 12, the connecting pipe 22 becomes soft, thereby achieving the falling back of the stirring rod 21.

[0038] The side wall of the stirring shaft 2 is also welded and fixedly connected with a support shaft 23, and one end of the support shaft 23 away from the stirring shaft 2 abuts against the stirring rod 21 to support the stirring rod 21. This design can effectively control the downward swing amplitude of the stirring rod 21 to prevent excessive swinging from causing damage to the equipment. The function of the support shaft 23 is to limit the maximum downward swing amplitude of the stirring rod 21 so that it can swing freely within a certain range. In addition, the support shaft 23 can also be appropriately adjusted according to the actual working conditions to adapt to different production needs. In short, this design not only improves the safety of the equipment, but also enhances its flexibility and adaptability.

[0039] In the initial state, the end of the stirring rod 21 away from the stirring shaft 2 is tilted downward, and the present application is provided with a guide boss 17 integrally formed in the middle part of the bottom wall of the barrel 1, the guide boss 17 is arranged upward, and a reflow zone 18 is formed between the guide boss 17 and the bottom of the inner wall of the barrel 1, and the discharge direction of the reflow channel inside the stirring rod 21 points to the reflow zone 18. This design helps to guide the raw material to form a stable reflow path inside the barrel 1, further improving the uniformity of the raw material. The bottom surface of the guide boss 17 fits tightly with the bottom wall of the barrel 1, and the upper end gradually narrows to form an ideal reflow zone 18 domain. The shape of the reflow zone 18 is similar to an annular groove and is arranged around the guide boss 17. A nozzle can also be provided at the end of the reflow channel inside the stirring rod 21, and the direction of the nozzle is pointed to the reflow zone 18, so that the raw material can quickly enter the reflow zone 18 after being ejected and circulate therein. This design avoids the accumulation of raw materials in the middle part of the bottom of the barrel 1, thereby improving the uniformity of the raw material in the entire barrel 1. At the same time, the existence of the reflow zone 18 also helps to eliminate dead corners, ensuring that every corner can be fully stirred. This design is not only suitable for large-scale production injection molding equipment, but can also be used in small laboratory equipment, and has wide applicability and promotion value.

[0040] Specifically, the stirring shaft 2 is a cylindrical metal rod, and its material can be selected from stainless steel or aluminum alloy to ensure high temperature resistance and corrosion resistance. The top end of the stirring shaft 2 is rotatably connected to the top cover 15 through a bearing, which can reduce friction and extend service life.

[0041] Reference Figure 2 The stirring rod 21 is a flat, approximately rectangular metal plate, and is also made of stainless steel or aluminum alloy to adapt to high temperature environments. The cross-section of the stirring rod 21 is flat, and the thickness of the end in the width direction is less than the thickness of the middle part. This design reduces the resistance of the stirring rod 21 during rotation. In addition, the return channel 16 in the stirring rod 21 is also penetrated by a plurality of return ports 210, which are evenly distributed along the length direction of the stirring rod 21 and the opening directions of adjacent return ports are opposite, which further enhances the turbulence effect on the raw materials inside the barrel 1.

[0042] The discharge pipe 12 is a metal pipe, which is also made of stainless steel to prevent rust during long-term use. The discharge pipe 12 is connected to the barrel 1 through a flange to ensure good sealing. The return pipe 14 is a metal pipe, which is also made of stainless steel. Like the discharge pipe 12, it is connected to the discharge pipe 12 through a flange. The three-way valve 13 is located at the connection between the discharge pipe 12 and the return pipe 14, and the flow direction can be switched manually or electrically to achieve normal discharge or return circulation.

[0043] Reference Figure 3The top of the return channel 16 in the stirring shaft 2 is fixedly provided with a fan blade 3. When the raw material is pumped to the fan blade 3, the high-speed flowing raw material will exert force on the fan blade 3, so that the fan blade 3 drives the stirring shaft 2 to rotate. Therefore, the present application can use the high-speed flowing raw material to realize the automatic rotation of the stirring shaft 2 and the stirring rod 21 without adding additional driving elements.

[0044] The number of blades 3 of the present application is more than one pair, and several blades 3 are evenly distributed along the circumference of the return channel 16. In the present embodiment, the blade 3 is a thin sheet of metal, which is made of stainless steel and has a polished surface to reduce the resistance during movement. Each blade 3 is fixedly connected to a driven gear 31 near the center of the stirring shaft 2. Correspondingly, a driving gear 32 is provided inside the stirring shaft 2 for rotation. The driving gear 32 meshes with several driven gears 31 to achieve the synchronous rotation of several blades 3. An active rod 33 is fixedly connected to the top surface of the active gear 32. The active rod 33 is coaxially arranged with the active gear 32. The top of the active rod 33 extends out of the stirring shaft 2, the top cover 15 and the return pipe 14, so as to facilitate manual adjustment operations outside. Through such a design, the synchronous adjustment of several blades 3 can be achieved by rotating the active rod 33, and the operation is more convenient and the relative angle relationship between the blades 3 is more stable and accurate.

[0045] In addition, each blade 3 is also fixedly connected with an adjustment rod 34, and the side wall of the stirring shaft 2 is provided with an adjustment hole 35, and the adjustment rod 34 is adapted to pass through the adjustment hole 35 and can rotate around the axis of the adjustment hole 35, and the outer side of the portion of the adjustment rod 34 extending out of the adjustment hole 35 is provided with an adjustment bolt 36, and the adjustment bolt 36 abuts against the outer wall of the stirring shaft 2 to achieve the locking of the angle of the blade 3. When the angle of the blade 3 needs to be changed, the adjustment bolt 36 can be loosened so that the adjustment rod 34 can rotate freely in the adjustment hole 35, thereby adjusting the position and angle of the blade 3. This design not only improves the operational flexibility of the equipment, but also optimizes the stirring effect under different working conditions, and improves the uniformity and fluidity of the raw materials inside the barrel 1. At the same time, tightening the adjustment bolt 36 again after the adjustment is completed can ensure that the angle of the blade 3 is fixed and unchanged, thereby ensuring the stability of the equipment operation.

[0046] When the raw materials are pumped into the return pipe 14 through the discharge pump 11, the high-speed circulating raw materials will generate thrust on the blades 3, so that the blades 3 drive the stirring shaft 2 to rotate. Since the number of blades 3 is large and evenly distributed, the entire stirring shaft 2 and the stirring rod 21 can obtain relatively uniform power, achieving an efficient stirring effect. In addition, the angle of each blade 3 can be easily adjusted by adjusting the active rod 33, and the angle can be finally locked by adjusting the bolt 36 to adapt to different production process requirements. This design not only simplifies the equipment structure, but also improves work efficiency and reduces energy consumption.

[0047] The implementation principle of this embodiment is as follows: during normal discharging, the discharging pump 11 is used to pump the raw materials inside the barrel 1 to the discharging pipe 12 for injection molding discharging. When injection molding discharging is not required, for example, during cooling, the three-way valve 13 can be used to adjust the raw materials to be pumped from the discharging pump 11 to the return pipe 14, and finally flow back to the inside of the barrel 1 from the return channel 16 inside the stirring shaft 2 and the stirring rod 21. In this process, the raw materials are continuously transported toward the edge of the inner wall of the barrel 1 and tilted downward under the action of the angle of the stirring rod 21, and finally transported upward from the middle position of the bottom of the barrel 1 to complete the cycle. In this way, the raw materials inside the barrel 1 can be effectively circulated inside, outside and between layers, which significantly improves the uniformity of the raw materials. This design not only improves product quality, but also reduces the scrap rate and saves production costs.

[0048] In addition, when the raw material is pumped into the loop channel, the connecting tube 22 will be filled and hardened, thereby lifting the stirring rod 21. When the raw material is discharged from the discharge pipe 12, the connecting tube 22 becomes soft, thereby falling back the stirring rod 21. Injection molding equipment often only needs to discharge materials periodically, so the stirring rod 21 in the actual working process of this application can be lifted and dropped periodically, so that the stirring rod 21 can disturb the raw materials in various places more comprehensively, and the disturbance method is different from the circumferential disturbance of the traditional stirring rod 21, but a swinging disturbance.

[0049] The embodiment of the present application also discloses an injection molding process for a seat guard plate of a new energy vehicle.

[0050] An injection molding process for a new energy vehicle seat guard plate based on an injection molding device, wherein a discharge pump 11 is used to pump the raw material inside a barrel 1 to a discharge pipe 12 for injection molding and discharging during normal discharging, and when injection molding and discharging are not required, for example, during the cooling process after the guard plate is injected and the demolding process, a three-way valve 13 can be used to adjust the raw material to be pumped from the discharge pump 11 to a return pipe 14, and finally to flow back to the barrel 1 from a return channel 16 inside a stirring shaft 2 and a stirring rod 21, and the raw material is continuously transported toward the inner wall edge of the barrel 1 and obliquely downward under the action of the angle of the stirring rod 21, and finally to be transported upward from the middle position at the bottom of the barrel 1 to complete the cycle.

[0051] This design enables the raw materials inside the barrel 1 to flow effectively inside, outside and between layers, which significantly improves the uniformity of the raw materials.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An injection molding device for a seat guard plate of a new energy vehicle, comprising a barrel (1), wherein the barrel (1) is provided with a discharge pipe (12), and a discharge pump (11) is provided between the barrel (1) and the discharge pipe (12), wherein: The barrel (1) is provided with a stirring shaft (2) inside, a stirring rod (21) is provided on the side wall of the stirring shaft (2), and a return channel (16) which is interconnected is provided inside the stirring shaft (2) and the stirring rod (21), the end of the stirring rod (21) away from the stirring shaft (2) is arranged obliquely downward, the discharge pipe (12) is connected to a return pipe (14), a three-way valve (13) is provided at the connection between the discharge pipe (12) and the return pipe (14), and the return pipe (14) is connected to the return channel (16).

2. The injection molding equipment for a seat guard plate of a new energy vehicle according to claim 1 is characterized in that: The top of the barrel (1) is open and provided with a top cover (15), the stirring shaft (2) is rotatably connected to the top cover (15), and a fan blade (3) is fixedly provided inside the return channel (16) in the stirring shaft (2).

3. The injection molding equipment for a seat guard plate of a new energy vehicle according to claim 2 is characterized in that: The fan blade (3) is connected to an adjusting rod (34); the stirring shaft (2) is provided with an adjusting hole (35); the adjusting rod (34) passes through the adjusting hole (35) and can rotate around the axis of the adjusting hole (35); the adjusting rod (34) is sleeved with an adjusting bolt (36); the adjusting bolt (36) abuts against the outer wall of the stirring shaft (2).

4. The injection molding equipment for a seat guard plate of a new energy vehicle according to claim 3 is characterized in that: The number of the fan blades (3) is more than one pair and the plurality of fan blades (3) are evenly distributed along the circumference of the return channel (16); the fan blades (3) are connected to a driven gear (31); the stirring shaft (2) is rotatably connected to a driving gear (32); the driving gear (32) is kneaded with the plurality of driven gears (31); the driving gear (32) is connected to an active rod (33); the active rod (33) extends out of the stirring shaft (2) and the top cover (15).

5. The injection molding equipment for a seat guard plate of a new energy vehicle according to claim 1 is characterized in that: The return channel (16) in the stirring rod (21) is provided with a plurality of return openings (210), the plurality of return openings (210) are evenly distributed along the length direction of the stirring rod (21), and the opening directions of adjacent return openings (210) are opposite.

6. The injection molding equipment for a seat guard plate of a new energy vehicle according to claim 1 is characterized in that: The stirring rod (21) is rotationally connected to the stirring shaft (2), and the stirring rod (21) and the stirring shaft (2) are connected to each other through a flexible connecting pipe (22) to achieve communication between the return channels (16) inside each of the two.

7. The injection molding equipment for a seat guard plate of a new energy vehicle according to claim 6 is characterized in that: The outer edge profile of the cross section of the stirring rod (21) is flat, and the thickness of the end portion in the width direction is smaller than the thickness in the middle.

8. The injection molding equipment for a seat guard plate of a new energy vehicle according to claim 6 is characterized in that: The stirring shaft (2) is connected to a support shaft (23), and one end of the support shaft (23) away from the stirring shaft (2) abuts against the stirring rod (21) to support the stirring rod (21).

9. The injection molding equipment for a seat guard plate of a new energy vehicle according to claim 1, characterized in that: A guide boss (17) is provided in the middle of the bottom wall of the barrel (1), a reflux zone (18) is formed between the guide boss (17) and the inner wall of the barrel (1), and the discharge direction of the reflux channel inside the stirring rod (21) points to the reflux zone (18).

10. An injection molding process for a seat guard plate of a new energy vehicle based on the injection molding equipment according to any one of claims 1 to 9, characterized in that: During the normal discharging process, the discharging pump (11) is used to pump the raw materials in the barrel (1) to the discharging pipe (12) for injection molding discharging. When injection molding discharging is not required, for example, during the cooling process after the injection molding of the guard plate and the demoulding process, the three-way valve (13) can be used to adjust the raw materials to be pumped from the discharging pump (11) to the return pipe (14), and finally return to the barrel (1) from the return channel (16) inside the stirring shaft (2) and the stirring rod (21). Under the action of the angle of the stirring rod (21), the raw materials are continuously transported toward the inner wall edge of the barrel (1) and tilted downward, and finally transported upward from the middle position of the bottom of the barrel (1) to complete the cycle, so that the raw materials in the barrel (1) can be effectively circulated inside, outside and between layers, thereby improving the uniformity of the raw materials.

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