Anti-overflow mechanism of injection molding mold for electric vehicle storage trunk shell

Abstract

The utility model relates to mould anti -overflow technology field discloses the injection molding mould anti -overflow mechanism of electric vehicle storage tail box casing, including the flow adjusting bin, the inside fixed water stop disc of static of flow adjusting bin, the one end surface rotatory mounting of water stop disc has movable water stop disc, the side surface mounting of flow adjusting bin is used for the self reset drive assembly of drive movable water stop disc rotation. The injection molding mould anti -overflow mechanism of electric vehicle storage tail box casing, through the mechanism can real -time perception mould local high temperature area, and automatically adjust fast this area cooling water flow, rapidly take away the heat accumulation, effectively reduce the mould temperature of this area, this directly improved the viscosity of contact high temperature area melt, make its flow resistance increase, thereby greatly weakened the ability of melt seepage into the parting surface gap, fundamentally suppressed the tendency of overflow because of temperature is too high.

Description

Technical Field

[0001] This utility model relates to the field of mold overflow prevention technology, and in particular to an overflow prevention mechanism for injection molding molds of electric vehicle storage tail box shells. Background Technology

[0002] With the rapid development of the electric vehicle market, the demand for its supporting storage tailgate shells has surged. These shells are typically characterized by complex structures, large dimensions, and high surface quality requirements, and are often mass-produced using injection molding.

[0003] Mold temperature control is one of the key factors in preventing overflow. Traditional injection molds generally use built-in cooling channels for temperature management. When the temperature in a local area of ​​the mold is too high, it will significantly reduce the viscosity of the molten plastic in contact with that area. The low viscosity melt has stronger fluidity and is more likely to penetrate into the tiny parting surface gap under the action of injection pressure, which greatly increases the tendency to overflow.

[0004] Large and complex electric vehicle tail box shell molds have different rates of heat absorption and dissipation in different areas during the injection molding cycle, which can easily generate obvious temperature gradients. Ultimately, this results in the parting surface failing to achieve uniform, stable, and high-precision bonding throughout the entire contact area, forming gaps and providing channels for material overflow. Utility Model Content

[0005] In view of the problem that excessively high mold temperatures reduce melt viscosity and increase the tendency for overflow, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide an anti-overflow mechanism for the injection molding mold of the storage tail box shell of electric vehicles. Its purpose is to significantly reduce the temperature difference between different areas of the mold by dynamically adjusting the cooling intensity of different areas, and greatly improve the overall temperature uniformity of the mold.

[0007] To solve the above technical problems, this utility model provides the following technical solution: an anti-overflow mechanism for the injection molding mold of the storage tail box shell of an electric vehicle, including a flow regulating chamber, wherein connector pipes are provided on both sides of the flow regulating chamber, and connector pipes are welded on both sides of the flow regulating chamber at the positions opposite to the through holes.

[0008] The flow regulating chamber has a stationary water-blocking plate fixed inside, and a movable water-blocking plate is rotatably installed on one end face of the stationary water-blocking plate. A self-resetting drive assembly for driving the movable water-blocking plate to rotate is installed on the side of the flow regulating chamber.

[0009] A water outlet hole is provided at the center of the stationary water blocking plate, and water outlet cavities are provided at the upper and lower positions of the center of the movable water blocking plate. A ring of water passage holes is provided on one end face of the stationary water blocking plate, and a ring of water blocking holes is provided on one end face of the movable water blocking plate.

[0010] As an improved technical solution, flow-blocking plates are fixed at all four corners of the static water-blocking plate, and the flow-blocking plates are fixed on the inner wall of the flow regulating chamber.

[0011] As an improved technical solution, a shaft frame is welded to the inner wall of the flow regulating chamber and to the end face of the movable water blocking plate away from the stationary water blocking plate. A rotating shaft is rotatably mounted on the shaft frame via a bearing, and the end of the rotating shaft away from the shaft frame is fixed at the center of the movable water blocking plate. A transmission shaft is rotatably mounted on the side of the flow regulating chamber near the self-resetting drive assembly via a sealed bearing. A bevel gear transmission component is installed between the transmission shaft and the rotating shaft. A spur gear is sleeved on the end of the transmission shaft away from the rotating shaft. A rack that meshes with the spur gear is installed on the movable end of the self-resetting drive assembly.

[0012] As an improved technical solution, the shaft frame is provided with a rectangular drainage hole, and the bevel gear transmission component is composed of two meshing bevel gears.

[0013] As an improved technical solution, the self-resetting drive assembly includes a thermomagnetic strip mounted on the flow regulating chamber and a permanent magnet strip vertically slidably mounted on the flow regulating chamber. The rack is fixed in the middle of the end face of the permanent magnet strip away from the thermomagnetic strip, and the opposing surfaces of the thermomagnetic strip and the permanent magnet strip are in a state of magnetic repulsion.

[0014] As an improved technical solution, T-shaped rods are fixed at both ends of the top of the thermomagnetic strip, and sliding holes are opened at both ends of the permanent magnet strip for the vertical ends of the T-shaped rods to pass through. A spring is sleeved on the vertical end of the T-shaped rod located on the end face of the permanent magnet strip away from the thermomagnetic strip.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are:

[0016] 1. In this utility model, the higher the temperature of the mold, the higher the alignment between the water passage hole and the water blocking hole, and the more water flows through the water passage hole and the water blocking hole. The lower the temperature, the less water flows through the water passage hole and the water blocking hole. This is achieved by using a purely mechanical structure, avoiding the impact of high temperature on electronic products and ensuring the stability of the mechanism.

[0017] 2. This utility model's mechanism can sense local high-temperature areas of the mold in real time and automatically increase the cooling water flow rate in those areas to quickly remove accumulated heat and effectively reduce the mold temperature in those areas. This directly increases the viscosity of the melt in the high-temperature contact area, increasing its flow resistance and thus greatly weakening the melt's ability to penetrate into the parting line gap. This fundamentally suppresses the tendency for overflow caused by excessive temperature. Furthermore, by installing the mechanism at different heat dissipation positions within the device, the cooling intensity of different areas can be dynamically adjusted, significantly reducing the temperature difference between different areas of the mold and greatly improving the overall temperature uniformity of the mold. This helps to cut off the physical channels for overflow. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is a schematic diagram of the overall structure of the anti-overflow mechanism of the injection molding mold for the electric vehicle storage tail box shell of this utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of the overflow prevention mechanism of the injection molding mold for the electric vehicle storage tail box shell of this utility model.

[0021] Figure 3 This is a schematic diagram of the separation structure of the stationary water-blocking plate and the movable water-blocking plate of the anti-overflow mechanism of the injection molding mold for the electric vehicle storage tail box shell of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Flow regulating chamber; 2. Connector pipe; 3. Through hole; 4. Self-resetting drive assembly; 41. Thermomagnetic strip; 42. Permanent magnet strip; 43. T-shaped rod; 44. Spring; 5. Rack; 6. Spur gear; 7. Baffle plate; 8. Static water-blocking plate; 9. Movable water-blocking plate; 10. Leakage hole; 11. Shaft bracket; 12. Rotating shaft; 13. Transmission shaft; 14. Water passage hole; 15. Water outlet hole; 16. Water outlet cavity; 17. Water-blocking hole; 18. Bevel gear transmission component. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example 1

[0025] Reference Figures 1-3 This is the first embodiment of the present invention, which provides an anti-overflow mechanism for the injection molding mold of the electric vehicle storage tail box shell. The anti-overflow mechanism for the injection molding mold of the electric vehicle storage tail box shell includes a flow regulating chamber 1. Connector pipes 2 are provided on both sides of the flow regulating chamber 1. Connector pipes 2 are welded on both sides of the flow regulating chamber 1 at the position opposite to the through hole 3.

[0026] The interior of the flow regulating chamber 1 is fixed with a stationary water blocking plate 8. A movable water blocking plate 9 is rotatably installed on one end face of the stationary water blocking plate 8. A self-resetting drive assembly 4 for driving the movable water blocking plate 9 to rotate is installed on the side of the flow regulating chamber 1.

[0027] A water outlet hole 15 is provided at the center of the stationary water blocking plate 8, and water outlet cavities 16 are provided at the upper and lower positions of the center of the movable water blocking plate 9. A ring of water passage holes 14 is provided on one end face of the stationary water blocking plate 8, and a ring of water blocking holes 17 is provided on one end face of the movable water blocking plate 9. The number and diameter of the water blocking holes 17 and the water passage holes 14 are the same. When the cooling water enters the interior of the flow regulating chamber 1, part of the water flows directly through the water outlet hole 15 and the water outlet cavity 16 and is discharged from the discharge end, while another part of the water flows through the water passage hole 14 and the water blocking hole 17 before being discharged from the discharge end.

[0028] The flow regulation component can sense local high-temperature areas of the mold in real time and automatically increase the cooling water flow rate in those areas to quickly remove the accumulated heat and effectively reduce the mold temperature in those areas. This directly increases the viscosity of the melt in the high-temperature contact area, increasing its flow resistance and thus greatly weakening the melt's ability to penetrate into the parting line gap. This fundamentally suppresses the tendency for overflow caused by excessive temperature. Furthermore, by installing the mechanism at different heat dissipation positions within the device, the cooling intensity of different areas can be dynamically adjusted, significantly reducing the temperature difference between different areas of the mold and greatly improving the overall temperature uniformity of the mold. This helps to cut off the physical channels for overflow.

[0029] Each of the four corners of the stationary water-blocking plate 8 is fixed with a flow-blocking plate 7, and the flow-blocking plate 7 is fixed on the inner wall of the flow regulating chamber 1. The flow-blocking plate 7 is used to block the four corners of the stationary water-blocking plate 8 to prevent water from flowing directly through the periphery of the stationary water-blocking plate 8.

[0030] A shaft bracket 11 is welded to the inner wall of the flow regulating chamber 1 and to the end face of the movable water blocking plate 9 away from the stationary water blocking plate 8. A rotating shaft 12 is rotatably mounted on the shaft bracket 11 via a bearing, and the end of the rotating shaft 12 away from the shaft bracket 11 is fixed at the center of the movable water blocking plate 9. A transmission shaft 13 is rotatably mounted on the side of the flow regulating chamber 1 near the self-resetting drive assembly 4 via a sealed bearing. A bevel gear transmission component 18 is installed between the transmission shaft 13 and the rotating shaft 12. A spur gear 6 is sleeved on the end of the transmission shaft 13 away from the rotating shaft 12. A rack 5 that meshes with the spur gear 6 is installed on the movable end of the self-resetting drive assembly 4.

[0031] The shaft bracket 11 has a rectangular drainage hole 10. The bevel gear transmission component 18 consists of two meshing bevel gears, one of which is mounted on the transmission shaft 13 and the other is mounted on the rotating shaft 12.

[0032] The self-resetting drive assembly 4 includes a thermomagnetic strip 41 mounted on the flow regulating chamber 1 and a permanent magnet strip 42 vertically slidably mounted on the flow regulating chamber 1. A rack 5 is fixed at the middle of the end face of the permanent magnet strip 42 away from the thermomagnetic strip 41. The opposing surfaces of the thermomagnetic strip 41 and the permanent magnet strip 42 are in a state of magnetic repulsion. The thermomagnetic strip 41 is made of nickel-cobalt-manganese-indium alloy.

[0033] The higher the temperature of the mold, the higher the alignment between the water passage hole 14 and the water blocking hole 17, and the more water flows through the water passage hole 14 and the water blocking hole 17. The lower the temperature, the less water flows through the water passage hole 14 and the water blocking hole 17. This is achieved by using a purely mechanical structure to avoid the impact of high temperature on electronic products and ensure the stability of the mechanism.

[0034] Both ends of the top of the thermomagnetic strip 41 are fixed with T-shaped rods 43, and both ends of the permanent magnet strip 42 are provided with sliding holes for the vertical ends of the T-shaped rods 43 to pass through. A spring 44 is sleeved on the vertical end of the T-shaped rod 43 located on the end face of the permanent magnet strip 42 away from the thermomagnetic strip 41.

[0035] The working principle of this utility model is as follows: the structure is installed in the heat dissipation channel of the mold, and the heat dissipation pipe is connected to the connector pipe 2 to realize the connection between the flow regulating chamber 1 and the heat dissipation pipe, so that the cold water enters from one end of the flow regulating chamber 1 and is discharged from the other end.

[0036] In the initial state, the water passage 14 and the water blocking hole 17 are offset, and the cooling water cannot pass through the water passage 14 and the water blocking hole 17 to be discharged directly.

[0037] As the mold temperature gradually increases, the thermomagnetic strip 41 absorbs the heat from the mold and generates magnetism. Under the magnetic repulsion between the thermomagnetic strip 41 and the permanent magnet strip 42, the permanent magnet strip 42 drives the rack 5 to move upward. Under the meshing transmission action of the rack 5, the transmission shaft 13 is driven to rotate. Under the transmission action of the bevel gear transmission component 18, the rotating shaft 12 follows the transmission shaft 13 to rotate. The rotating shaft 12 drives the movable water-blocking plate 9 to rotate. The rotation angle of the movable water-blocking plate 9 is... The alignment between the water-blocking hole 17 and the water-passing hole 14 is adjusted. When the temperature of the thermomagnetic strip 41 decreases, it loses its magnetism. Under the elastic action of the spring 44, the permanent magnet strip 42 is reset, so that the water-passing hole 14 and the water-blocking hole 17 return to the misaligned state. The higher the temperature of the mold, the higher the alignment between the water-passing hole 14 and the water-blocking hole 17, and the more water flows through the water-passing hole 14 and the water-blocking hole 17. The lower the temperature, the less water flows through the water-passing hole 14 and the water-blocking hole 17.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An anti-overflow mechanism for the injection molding mold of the storage tail box shell of an electric vehicle, including a flow regulating chamber (1), characterized in that: The flow regulating chamber (1) has connector pipes (2) on both sides, and connector pipes (2) are welded on both sides of the flow regulating chamber (1) at the position opposite to the through hole (3). The flow regulating chamber (1) has a stationary water blocking plate (8) fixed inside. A movable water blocking plate (9) is rotatably installed on one end face of the stationary water blocking plate (8). A self-resetting drive assembly (4) for driving the movable water blocking plate (9) to rotate is installed on the side of the flow regulating chamber (1). The stationary water-blocking plate (8) has a water outlet hole (15) at its center, and the movable water-blocking plate (9) has water outlet cavities (16) at the upper and lower positions of its center. A ring of water passage holes (14) is opened on one end face of the stationary water-blocking plate (8), and a ring of water blocking holes (17) is opened on one end face of the movable water-blocking plate (9).

2. The anti-overflow mechanism for the injection molding mold of the electric vehicle storage tail box shell according to claim 1, characterized in that: The four corners of the static water-blocking plate (8) are all fixed with flow-blocking plates (7), and the flow-blocking plates (7) are fixed on the inner wall of the flow-regulating chamber (1).

3. The anti-overflow mechanism for the injection molding mold of the electric vehicle storage tail box shell according to claim 2, characterized in that: A shaft frame (11) is welded to the inner wall of the flow regulating chamber (1) and to the end face of the movable water blocking plate (9) away from the stationary water blocking plate (8). A rotating shaft (12) is rotatably mounted on the shaft frame (11) via a bearing, and the end of the rotating shaft (12) away from the shaft frame (11) is fixed at the center of the movable water blocking plate (9). A transmission shaft (13) is rotatably mounted on the side of the flow regulating chamber (1) near the self-resetting drive assembly (4) via a sealed bearing. A bevel gear transmission component (18) is installed between the transmission shaft (13) and the rotating shaft (12). A spur gear (6) is sleeved on the end of the transmission shaft (13) away from the rotating shaft (12). A rack (5) that meshes with the spur gear (6) is installed on the movable end of the self-resetting drive assembly (4).

4. The anti-overflow mechanism for the injection molding mold of the electric vehicle storage tail box shell according to claim 3, characterized in that: The shaft frame (11) has a rectangular drainage hole (10), and the bevel gear transmission component (18) consists of two meshing bevel gears.

5. The anti-overflow mechanism for the injection molding mold of the electric vehicle storage tail box shell according to claim 4, characterized in that: The self-resetting drive assembly (4) includes a thermomagnetic strip (41) mounted on the flow regulating chamber (1) and a permanent magnet strip (42) slidably mounted on the flow regulating chamber (1). The rack (5) is fixed in the middle of the end face of the permanent magnet strip (42) away from the thermomagnetic strip (41). The opposing surfaces of the thermomagnetic strip (41) and the permanent magnet strip (42) are in a state of magnetic repulsion.

6. The anti-overflow mechanism for the injection molding mold of the electric vehicle storage tail box shell according to claim 5, characterized in that: Both ends of the top of the thermomagnetic strip (41) are fixed with T-shaped rods (43), and both ends of the permanent magnet strip (42) are provided with sliding holes for the vertical end of the T-shaped rod (43) to pass through. A spring (44) is sleeved on the vertical end of the T-shaped rod (43) and on the end face of the permanent magnet strip (42) away from the thermomagnetic strip (41).

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