Energy storage device for an electric injection molding machine

Abstract

This invention relates to an energy storage device for an electric injection molding machine, belonging to the field of injection molding machine technology. It includes a base and an injection mechanism, an energy storage mechanism, and a sliding mechanism mounted on the base. The injection mechanism is connected to the energy storage mechanism via the sliding mechanism and is installed at the sliding end of the sliding mechanism. The energy storage mechanism stores or releases energy during the movement of the sliding mechanism. The energy storage mechanism includes an energy storage component and a multi-segment energy storage component. The multi-segment energy storage component stores the kinetic energy used by the energy storage component to move the injection mechanism and the sliding mechanism. The multi-segment energy storage component releases the stored energy in stages, acting on the sliding mechanism to drive the injection mechanism to perform injection. This invention solves the problem of poor quality that occurs during high-speed injection throughout the injection molding process, and addresses the need for higher injection speeds in deep-cavity molds or high-viscosity melts without requiring larger diameter and higher-power injection ball screws and servo motors.

Description

Technical Field

[0001] This invention belongs to the field of injection molding machine technology, and specifically relates to an energy storage device for an electric injection molding machine. Background Technology

[0002] The basic injection principle of a conventional electric injection molding machine relies on a servo motor driving a ball screw, which in turn propels the melting unit forward, injecting molten plastic into the mold at appropriate speed and pressure. With technological advancements, the requirements for injection speed and pressure are increasing to meet the demands of deep-cavity molds or high-viscosity melts.

[0003] This means that to meet the demands of service life and speed, the injection ball screw and servo motor will need to be designed with larger diameters and higher power. Furthermore, the marginal effect of increasing acceleration by increasing motor power will decrease as motor power increases, necessitating even greater investment. Additionally, since injection time constitutes a small proportion of each mold's production cycle, the high-current operating period of the injection drive is relatively short, meaning the injection drive motor spends a significant amount of time at low energy output, resulting in the substantial investment in equipment not being fully utilized.

[0004] For example, Chinese invention patent CN104526994B discloses an injection device for increasing the injection acceleration of an injection molding machine, including an injection screw, a nut, a nut seat, a guide rod, and an injection motor. The guide rod is parallel to the barrel support and the injection motor seat. The nut seat is slidably mounted on the guide rod. The front section of the injection screw is screwed into the nut, and the rear section is connected to the output shaft of the injection motor. The injection motor is mounted on the injection motor seat. The nut seat is connected to the melting screw of the injection molding machine. The nut is slidably disposed in the shaft hole of the nut seat. The nut seat is provided with a locking device that can lock the nut to make it an integral part of the nut seat. An elastic energy storage component is provided between the nut seat and the injection motor seat, which is compressed when the nut seat moves backward.

[0005] The aforementioned injection molding machine adds an elastic energy storage component to the conventional injection mechanism formed by the injection motor and the injection screw nut assembly. This increases the injection thrust and improves the acceleration gradient, allowing it to meet the requirements of deep cavity molds or high-viscosity melts without the need for larger ball screws and higher-power servo motors. However, during the injection process, the energy storage component releases all its energy at once to increase the injection speed. If the raw material in the barrel is not completely melted and contains certain solid particles, this will lead to poor product quality. Furthermore, because the nozzle contacts the mold during the injection molding process, and the mold temperature is lower than that of the nozzle due to the cooling water, some heat is carried away by the mold, which can easily generate cold sprue heads at the nozzle. If high-speed injection is performed directly, these cold sprue heads will be injected into the mold, causing blockage at the gate and resulting in flow marks or silver streaks, thus affecting product quality. Summary of the Invention

[0006] To address the aforementioned problems in the prior art, this invention provides an energy storage device for an electric injection molding machine. This device solves the problem that product quality cannot be guaranteed during the high-speed injection process of the injection molding machine due to various reasons, and the problem that larger diameter and higher power injection ball screws and servo motors are needed to meet the requirements of deep cavity molds or high-viscosity melts.

[0007] The objective of this invention can be achieved through the following technical solution: an energy storage device for an electric injection molding machine, comprising a base and an injection mechanism, an energy storage mechanism, and a sliding mechanism mounted on the base. The injection mechanism is connected to the energy storage mechanism through the sliding mechanism. The injection mechanism is mounted on the sliding end of the sliding mechanism. The energy storage mechanism stores or releases energy during the movement of the sliding mechanism.

[0008] The energy storage mechanism includes an energy storage component and a multi-segment energy storage component. The multi-segment energy storage component is connected to the sliding mechanism through the energy storage component. The multi-segment energy storage component stores the kinetic energy of the energy storage component that drives the injection mechanism to move the sliding mechanism. The multi-segment energy storage component releases the stored energy in segments to act on the sliding mechanism and drive the injection mechanism to perform injection.

[0009] The energy storage device of this electric injection molding machine utilizes an energy storage mechanism installed on one side wall of the base. During the molten stage of the injection mechanism, the energy storage components within this mechanism store energy for multiple energy storage components. When the injection mechanism begins injection, these components release the stored energy in stages. This allows the injection mechanism to initially feed the material at a low speed, pushing away the cold slug in the nozzle and preventing it from entering the mold cavity and causing product quality issues. This allows for high-speed injection later, meeting the requirements of deep-cavity molds or high-viscosity melts, which demand higher injection speeds. The multi-stage energy storage component solves the problem of poor quality that can occur during continuous high-speed injection in injection molding machines and addresses the need for higher injection speeds in deep-cavity molds or with high-viscosity melts without requiring larger diameter and higher-power injection ball screws and servo motors.

[0010] As a preferred embodiment of the present invention, the energy storage component includes a rotary joint, a sliding block, a fixed rod, and a lead screw. One end of the fixed rod is fixed to one side wall surface of the base. The lead screw is sleeved on the fixed rod. The sliding block is helically connected to the lead screw. The sliding end of the sliding mechanism is connected to the sliding block. The rotary joint is fixed to the end of the lead screw away from the base. The rotary joint changes the rotational motion of the lead screw into a rotational motion perpendicular to the lead screw axis. The rotary joint is rotatably connected to the multi-segment energy storage component.

[0011] As a preferred embodiment of the present invention, the multi-segment energy storage component includes a drive disk, a first energy storage disk, a second energy storage disk, a first spring, a second spring, a connecting shaft, and a support shaft. The drive disk is connected to a rotary joint via the connecting shaft. The first energy storage disk rotates on the support shaft, and the second energy storage disk is fixed on the support shaft. The first spring is disposed on the top of the first energy storage disk, and the second spring is disposed on the top of the second energy storage disk. The drive disk rotates to compress the first spring, and the first energy storage disk rotates under the compression of the first spring to compress the second spring.

[0012] As a preferred embodiment of the present invention, the bottom surface of the drive disk is provided with a drive column, the top surface of the first energy storage disk is provided with a first groove, the first spring is installed in the groove, the bottom surface of the first energy storage disk is provided with a push column, when the drive disk rotates, the drive column squeezes the first spring to push the first energy storage disk to rotate, and the length of the first spring is lower than the length of the first groove.

[0013] As a preferred embodiment of the present invention, a second groove is provided on the top surface of the second energy storage plate, and the second spring is installed in the groove, and the push column compresses the second spring.

[0014] As a preferred embodiment of the present invention, both the first and second slides are arc-shaped grooves.

[0015] As a preferred embodiment of the present invention, the rotary pair includes a first bevel tooth and a second bevel tooth. The first bevel tooth is sleeved on the lead screw, and the first bevel tooth and the second bevel tooth mesh with each other. The second bevel tooth is connected to the drive disk through a connecting shaft.

[0016] As a preferred embodiment of the present invention, the sliding mechanism includes a guide rail and a slider. The guide rod is fixed to the top surface of the base, and the slider is slidably disposed on the guide rail. One side of the slider is connected to the injection mechanism, and the other side is connected to the sliding block.

[0017] As a preferred embodiment of the present invention, the energy storage component includes a hydraulic energy storage component, which includes an energy storage cylinder and a hydraulic accumulator. The output end of the energy storage cylinder is connected to a sliding mechanism, and the hydraulic accumulator is located inside the energy storage cylinder. During the gel injection stage, the energy storage cylinder stores energy in the hydraulic accumulator.

[0018] As a preferred embodiment of the present invention, the hydraulic accumulator includes an air bladder and a housing, wherein the air bladder is located inside the housing, and the housing is fixed inside the accumulator cylinder.

[0019] The beneficial effects of this invention are as follows: the energy storage components in the energy storage mechanism store energy for the multi-segment energy storage components. During the injection stage, the multi-segment energy storage components release the stored energy in stages, allowing the injection mechanism to inject at a low speed first, squeezing out the cold sprue at the front end of the nozzle. This avoids the cold sprue from being pushed into the mold cavity during high-speed injection, which would affect the quality of the product. At the same time, high-speed injection is performed after squeezing out the cold sprue. This solves the problem of requiring a higher injection speed for deep cavity molds or high-viscosity melts without having to design larger diameter and higher power injection ball screws and servo motors. Attached Figure Description

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 for Figure 1 Enlarged view of point A;

[0023] Figure 3 This is a schematic diagram of the energy storage mechanism of the present invention;

[0024] Figure 4 This is a schematic diagram of the multi-segment energy storage component structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the rotating pair structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the first energy storage disk structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the second energy storage disk structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the hydraulic energy storage component structure of the present invention;

[0029] Explanation of main component symbols

[0030] In the diagram: 1. Base; 2. Injection mechanism; 3. Energy storage mechanism; 4. Sliding mechanism; 41. Guide rail; 42. Slider; 5. Energy storage assembly; 51. Rotary pair; 511. First bevel gear; 512. Second bevel gear; 52. Sliding block; 53. Fixed rod; 54. Lead screw; 6. Multi-segment energy storage assembly; 61. Drive plate; 62. First accumulator plate; 621. First slide groove; 63. Second accumulator plate; 631. Second slide groove; 64. First spring; 65. Second spring; 66. Connecting shaft; 67. Support shaft; 7. Hydraulic energy storage assembly; 71. Energy storage cylinder; 72. Hydraulic accumulator; 721. Airbag; 722. Outer shell. Detailed Implementation

[0031] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0032] Please see Figure 1-8 This embodiment provides an energy storage device for an electric injection molding machine, including a base 1 and an injection mechanism 2, an energy storage mechanism 3, and a sliding mechanism 4 mounted on the base 1. The injection mechanism 2 is mounted on the base 1 via the sliding mechanism 4, and the injection mechanism 2 is mounted on the sliding end of the sliding mechanism 4. The energy storage mechanism 3 begins to store energy when the injection mechanism 2 melts the glue. When the injection mechanism 2 begins to melt the glue, the existing injection servo unit on the injection molding machine (this is prior art and will not be described in detail here) controls the injection mechanism 2 to begin to retreat. During the retreat process, the energy storage mechanism 3 stores the kinetic energy of the retreating injection mechanism 2. When injection begins, the injection servo unit controls the injection mechanism 2 to begin injection. At this time, the energy storage mechanism 3 releases the stored energy to drive the injection mechanism 2 to perform high-speed injection. Although the injection speed of the injection mechanism 2 can be increased by using the energy storage mechanism 3... High injection speeds are required to meet the demands of deep-cavity molds or high-viscosity melts, but during injection, the nozzle comes into contact with the mold. Because the mold is cooled by the mold cooling water and its temperature is lower than that of the nozzle, some heat is carried away by the mold, easily causing cold slugs to form at the nozzle tip. If the energy in the energy storage mechanism 3 is released directly for injection, the cold slugs will be squeezed directly into the mold cavity during high-speed injection, resulting in poor product quality. Moreover, since the energy storage mechanism 3 uses a spring for energy storage, it cannot slow down once the energy is released. Furthermore, there is no forward and backward movement during injection, so there is no way to push away the cold slugs at the nozzle tip during high-speed injection to reduce their impact on the product.

[0033] To address the issue of reduced product quality resulting from increased injection speed using the energy storage mechanism 3 in injection molding machines, this embodiment includes an energy storage component 5 and a multi-segment energy storage component 6. The energy storage component 5 is fixed to one side wall of the base 1. During the melting stage of the injection mechanism 2, the energy storage component 5 stores energy in the multi-segment energy storage component 6. During the injection stage, the multi-segment energy storage component 6 releases the stored energy in stages. By releasing the energy stored during the melting stage in stages, the injection mechanism 2 can inject at a low speed at the beginning of injection, first pushing away the cold slug head at the nozzle tip to prevent it from entering the mold cavity and affecting the product. At the same time, during high-speed injection, since the multi-segment energy storage component 6 releases energy in stages, the energy storage mechanism 3 can still provide thrust to the injection mechanism 2. This allows the injection servo unit to meet the requirements of deeper cavity molds or high-viscosity melts that require higher injection speeds without needing to design larger diameter and higher power injection ball screws and servo motors.

[0034] To store energy during the sol stage, in this embodiment, the energy storage component 5 includes a rotary joint 51, a sliding block 52, a fixed rod 53, and a lead screw 54. One end of the fixed rod 53 is fixed to the side wall surface of the base 1. The lead screw 54 is sleeved on the fixed rod 53 and can rotate freely. The fixed rod 53 is composed of two cylindrical sections. The diameter of the front end connected to the base 1 is smaller than the diameter of the end end, which mainly prevents the lead screw 54 from sliding out of the fixed rod 53. The sliding block 52 is helically connected to the lead screw 54. The sliding end of the sliding mechanism 4 is connected to the sliding block 52. The rotary joint 51 is fixed on the lead screw 54 and close to the end of the fixed rod 53. The rotary joint 51 is rotatably connected to the segment energy storage component. During the sol stage, the injection mechanism 2 will retract, which will drive the sliding block 51 to rotate. The sliding end of the sliding mechanism 4 moves, and the sliding end of the sliding mechanism 4 drives the sliding block 52 to move backward. During the backward movement of the sliding block 52, since it is connected to the lead screw 54 by a screw drive, the lead screw 54 rotates during the backward movement of the sliding block 52, thereby driving the rotary joint 51 to rotate. Because the multi-segment energy storage component 6 is installed on the existing frame of the injection molding machine for easy installation, it is perpendicular to the axis of the lead screw 54. The rotary joint 51 can convert the horizontal rotation of the lead screw 54 into vertical rotation, so that the lead screw 54 can be connected to the multi-segment energy storage component 6 through the rotary joint 51. The multi-segment energy storage component 6 stores the rotational kinetic energy of the lead screw 54, which can be released in stages during the injection stage.

[0035] To achieve multi-stage energy storage, in one embodiment, the multi-stage energy storage component 6 includes a drive disk 61, a first energy storage disk 62, a second energy storage disk 63, a first spring 64, a second spring 65, a connecting shaft 66, and a support shaft 67. The drive disk 61 is connected to a rotary joint 51 via the connecting shaft 66. The first energy storage disk 62 rotates on the support shaft 67, and the second energy storage disk 63 is fixed on the support shaft 67. The first spring 64 is disposed on the top of the first energy storage disk 62, and the second spring 65 is disposed on the top of the second energy storage disk 63. When the multi-stage energy storage component 6 begins to store energy, the rotary joint 51 drives the drive disk 61 to rotate via the connecting shaft 66. During the rotation, the drive disk 61 compresses the first spring 64 on the first energy storage disk 62. After being compressed, the first spring 64 continues to compress the first energy storage disk 62, causing it to rotate. The force plate 62 stores energy by squeezing the second spring 65. At the start of injection, the injection speed is low and the injection mechanism 2 moves forward. At this time, the rotary joint 51 no longer applies force to the drive plate 61, but rotates in the opposite direction. The first spring 64 is no longer squeezed and releases its own elastic potential energy to complete the first stage of energy release, reducing the output force of the injection servo unit. At the same time, the second spring 65 also releases its own elastic potential energy. However, during the release of the second spring 65, it first pushes the first force plate 62 to rotate, then pushes the drive plate 61 to rotate, and the drive plate 61 then drives the rotary joint 51 to rotate. At this time, the first spring 64 has completed the release of its own elastic potential energy. The elastic potential energy released by the second spring 65 is the second stage of energy release to complete the high-speed injection process.

[0036] To better facilitate the release of multi-stage energy storage, in one embodiment, a drive column is provided on the bottom surface of the drive disk 61, and a first groove 621 is formed on the top surface of the first energy storage disk 62. A first spring 64 is installed in the groove, and a push column is provided on the bottom surface of the first energy storage disk 62. When the drive disk 61 rotates, the drive column compresses the first spring 64, pushing the first energy storage disk 62 to rotate. The length of the first spring 64 is shorter than the length of the first groove 621. During energy storage, the drive column of the drive disk 61 compresses the first spring 64 located in the first groove 621, causing the first spring 64 to generate elastic potential energy. Simultaneously, because the length of the first spring 64 is shorter than the length of the first groove 621, and the first spring 64... The length is only one-third of the length of the first slide groove 621. Therefore, when the second spring 65 starts to release the stored energy, the first energy storage disk 62 will not be able to contact the drive column for a period of time during the process of being pushed, so as to drive the drive disk 61 to rotate. The first energy storage disk 62 will rotate a certain distance before the first spring 64 contacts the drive column, thereby pushing the drive column to make the drive disk 61 start to rotate. At this time, the energy stored in the first spring 64 has been released. At this time, the low-speed injection process has also been completed. When the second spring 65 releases the stored energy, it completes the second stage release by making the first energy storage disk 62 rotate a certain distance, thus completing the multi-stage release of the multi-stage energy storage component 6.

[0037] To better achieve multi-stage energy release, in one embodiment, a second groove 631 is provided on the top surface of the second energy storage plate 63, and a second spring 65 is installed in the groove. During energy storage, the push column squeezes the second spring 65 to complete energy storage. By providing a second groove 631 on the top surface of the second energy storage plate 63 and installing the second spring 65 in the groove, the second groove 631 can restrict the position of the second spring 65 during energy storage and release, preventing the second spring 65 from deviating in position during energy storage and release, thus preventing the inability to store energy and thus preventing the multi-stage energy release.

[0038] In order to store energy during rotation, in one embodiment, the first slide 621 and the second slide 631 are both arc-shaped grooves. Since the multi-segment energy storage component 6 stores energy by rotation, the first slide 621 and the second slide 631 are both designed as arc-shaped grooves. In this way, during the energy storage process, the compression of the first spring 64 and the second spring 65 can be well completed to store energy.

[0039] In order to convert the horizontal rotation of the lead screw 54 into vertical rotation, in one embodiment, the rotary pair 51 includes a first bevel tooth 511 and a second bevel tooth 512. The first bevel tooth 511 is sleeved on the lead screw 54, and the first bevel tooth 511 and the second bevel tooth 512 mesh. The second bevel tooth 512 is connected to the drive disk 61 through the connecting shaft 66. The horizontal rotation direction is converted into the vertical rotation direction by the meshing of the first bevel tooth 511 and the second bevel tooth 512, so that the rotation of the lead screw 54 can be converted into the rotation of the drive disk 61, thereby completing the energy storage of the multi-segment energy storage component 6.

[0040] To better enable the energy storage component 5 to complete energy storage during the melting stage, in one embodiment, the sliding mechanism 4 includes a guide rail 41 and a slider 42. The guide rod is fixed to the top surface of the base 1, and the slider 42 is slidably disposed on the guide rail 41. One side of the slider 42 is connected to the injection mechanism 2, and the other side is connected to the sliding block 52. During the melting stage, the injection mechanism 2 retracts, causing the slider 42 to move backward. The sliding block 52 moves along with the slider 42. When the sliding block 52 moves, it drives the lead screw 54 to rotate, thereby completing the energy storage of the multi-segment energy storage component 6. Through the connection between the sliding block 52 and the slider 42, the sliding block 52 can move backward along with the injection mechanism 2 during the backward movement, allowing the multi-segment energy storage component 6 to complete the energy storage.

[0041] To achieve different energy storage effects, this embodiment also provides another energy storage scheme. The energy storage component 5 can also be composed of a hydraulic energy storage component 7. The hydraulic energy storage component 7 includes an energy storage cylinder 71 and a hydraulic accumulator 72. The output end of the energy storage cylinder 71 is connected to the sliding mechanism 4. The hydraulic accumulator 72 is located inside the energy storage cylinder 71. When the injection mechanism 2 is in the melting stage, the output end of the energy storage cylinder 71 retracts, squeezing hydraulic oil into the hydraulic accumulator 72 to complete energy storage. During the injection stage, the energy storage cylinder 71 no longer applies pressure to the hydraulic accumulator 72. This is the process where the hydraulic accumulator 72 releases the stored energy to complete the high-speed injection process.

[0042] To better achieve energy storage, in one embodiment, the hydraulic accumulator 72 includes an air bladder 721 and a housing 722. One end of the housing 722 has a small hole. The air bladder 721 is located at the bottom inside the housing 722. The housing 722 is fixed inside the accumulator cylinder 71. During the energy storage phase, the accumulator cylinder 71 forces hydraulic oil into the housing 722, compressing the air bladder 721, causing it to begin storing energy. During the injection phase, the accumulator cylinder 71 no longer compresses the hydraulic oil into the housing 722, thus compressing the air bladder. 721 is squeezed, at which point the airbag 721 begins to recover, expelling the hydraulic oil in the outer shell 722 to squeeze the output end of the accumulator cylinder 71. This is equivalent to an ordinary hydraulic cylinder extending under the drive of a hydraulic pump. The output end of the accumulator cylinder 71 pushes the slider 42 to drive the injection mechanism 2 to start injection, reducing the output force of the injection servo motor. This allows for the elimination of the need to design larger diameter and higher power injection ball screws and servo motors to meet the requirements of higher injection speeds for deep cavity molds or high-viscosity melts.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An energy storage device for an electric injection molding machine, characterized in that: It includes a base (1) and a glue injection mechanism (2), an energy storage mechanism (3) and a sliding mechanism (4) mounted on the base (1). The glue injection mechanism (2) is connected to the energy storage mechanism (3) through the sliding mechanism (4). The glue injection mechanism (2) is mounted on the sliding end of the sliding mechanism (4). The energy storage mechanism (3) stores or releases energy during the movement of the sliding mechanism (4). The energy storage mechanism (3) includes an energy storage component (5) and a multi-segment energy storage component (6). The multi-segment energy storage component (6) is connected to the sliding mechanism (4) through the energy storage component (5). The multi-segment energy storage component (6) stores the kinetic energy of the energy storage component (5) that drives the injection mechanism (2) to move the sliding mechanism (4). The multi-segment energy storage component (6) releases the stored energy in segments to act on the sliding mechanism (4) and drive the injection mechanism (2) to perform injection. The energy storage component (5) includes a rotary joint (51), a sliding block (52), a fixed rod (53), and a lead screw (54). One end of the fixed rod (53) is fixed to the side wall surface of the base (1). The lead screw (54) is sleeved on the fixed rod (53). The sliding block (52) is helically connected to the lead screw (54). The sliding end of the sliding mechanism (4) is connected to the sliding block (52). The rotary joint (51) is fixed to the end of the lead screw (54) away from the base (1). The rotary joint (51) changes the rotational motion of the lead screw (54) into a rotational motion perpendicular to the axis of the lead screw (54). The rotary joint (51) is rotatably connected to the multi-segment energy storage component (6). The multi-segment energy storage component (6) includes a drive disk (61), a first energy storage disk (62), a second energy storage disk (63), a first spring (64), a second spring (65), a connecting shaft (66), and a support shaft (67). The drive disk (61) is connected to a rotary joint (51) through the connecting shaft (66). The first energy storage disk (62) rotates on the support shaft (67), and the second energy storage disk (63) is fixed on the support shaft (67). The first spring (64) is located on the top of the first energy storage disk (62), and the second spring (65) is located on the top of the second energy storage disk (63). The drive disk (61) rotates and compresses the first spring (64). The first energy storage disk (62) rotates and compresses the second spring (65) under the compression of the first spring (64).

2. The energy storage device for an electric injection molding machine according to claim 1, characterized in that: The bottom surface of the drive disk (61) is provided with a drive column, the top surface of the first energy storage disk (62) is provided with a first groove (621), the first spring (64) is installed in the groove, the bottom surface of the first energy storage disk (62) is provided with a push column, when the drive disk (61) rotates, the drive column squeezes the first spring (64) to push the first energy storage disk (62) to rotate, and the length of the first spring (64) is lower than the length of the first groove (621).

3. The energy storage device for an electric injection molding machine according to claim 2, characterized in that: The second energy storage plate (63) has a second groove (631) on its top surface, and the second spring (65) is installed in the groove. The push column squeezes the second spring (65).

4. The energy storage device for an electric injection molding machine according to claim 3, characterized in that: Both the first groove (621) and the second groove (631) are arc-shaped grooves.

5. The energy storage device for an electric injection molding machine according to claim 1, characterized in that: The rotary pair (51) includes a first bevel tooth (511) and a second bevel tooth (512). The first bevel tooth (511) is sleeved on the lead screw (54). The first bevel tooth (511) and the second bevel tooth (512) mesh. The second bevel tooth (512) is connected to the drive disk (61) through the connecting shaft (66).

6. The energy storage device for an electric injection molding machine according to claim 1, characterized in that: The sliding mechanism (4) includes a guide rail (41) and a slider (42). The guide rail (41) is fixed on the top surface of the base (1). The slider (42) is slidably disposed on the guide rail (41). One side of the slider (42) is connected to the injection mechanism (2), and the other side is connected to the sliding block (52).

7. The energy storage device for an electric injection molding machine according to claim 1, characterized in that: The energy storage component (5) includes a hydraulic energy storage component (7), which includes an energy storage cylinder (71) and a hydraulic accumulator (72). The output end of the energy storage cylinder (71) is connected to the sliding mechanism (4), and the hydraulic accumulator (72) is located inside the energy storage cylinder (71). During the gel injection stage, the energy storage cylinder (71) stores energy in the hydraulic accumulator (72).

8. The energy storage device for an electric injection molding machine according to claim 7, characterized in that: The hydraulic accumulator (72) includes an air bladder (721) and a housing (722), the air bladder (721) being located inside the housing (722), and the housing (722) being fixed inside the accumulator cylinder (71).

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