Energy accumulator auxiliary servo injection system and injection molding machine

Abstract

The invention discloses an energy accumulator auxiliary servo glue injection system and an injection molding machine, and relates to the technical field of injection molding machines, the system comprises a first pump body, an energy accumulator and a glue injection assembly, and the glue injection assembly is used for carrying out glue injection operation under the hydraulic action; a first loop and a second loop which are connected in parallel are arranged between the first pump body and the glue injection assembly, and the first loop is provided with an energy accumulator; the first pump body is further used for filling liquid into an inlet of the energy accumulator through the first loop so that the energy accumulator can be filled with liquid to the preset hydraulic pressure. The first pump body is used for pumping liquid to the glue injection assembly through the second loop so as to provide hydraulic pressure to the glue injection assembly; and an outlet of the energy accumulator is used for discharging liquid to the glue injection assembly through the first loop so as to provide hydraulic pressure to the glue injection assembly. According to the invention, the first loop and the second loop which are connected in parallel are arranged, so that only the first pump body is allowed to supply liquid independently, or the first pump body and the energy accumulator are allowed to supply liquid together, and enough hydraulic pressure can be supplied to each action in the glue injection process only by a smaller energy accumulator volume or a combination of fewer energy accumulators.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machines, and in particular to an accumulator-assisted servo injection system and an injection molding machine. Background Art

[0002] The accumulator servo injection system is a commonly used high-speed injection control solution for injection molding machines. It has the characteristics of high response and high speed. It is suitable for injection molding thin-walled injection molded products with high precision requirements.

[0003] The accumulator servo injection system is generally composed of an oil pump, a check valve, an accumulator, an injection servo valve, an injection cylinder, an injection screw, etc. Before the injection action, the oil pump first fills the accumulator with liquid to the set pressure through the check valve; during injection, the accumulator is discharged, and the pressure oil enters the injection cylinder through the injection servo valve, pushing the injection screw to complete the product molding.

[0004] However, in the existing accumulator servo injection system, the hydraulic oil required for the injection, pressure holding and release actions in the injection process is provided by the accumulator, resulting in the need for a larger accumulator volume or a combination of more accumulators to supply oil for each action in the injection process. Due to the high price of the accumulator, it results in a higher manufacturing cost.

[0005] Therefore, a new type of accumulator servo injection system is urgently needed to solve the problem in the existing accumulator servo injection system that a larger accumulator volume or a combination of multiple accumulators is required to supply sufficient hydraulic pressure for each action during the injection process. Summary of the invention

[0006] The main purpose of the present invention is to propose an accumulator-assisted servo injection system and an injection molding machine, aiming to solve the problem in the existing accumulator-assisted servo injection system that a larger accumulator volume or a combination of multiple accumulators is required to supply sufficient hydraulic pressure for each action during the injection process.

[0007] To achieve the above-mentioned purpose, the present invention proposes an accumulator-assisted servo injection system, which is applied to an injection molding machine; the accumulator-assisted servo injection system includes a first pump body, an accumulator and an injection assembly, and the injection assembly is used to perform injection operation under the action of hydraulic pressure; a first circuit and a second circuit connected in parallel to each other are provided between the first pump body and the injection assembly, and an accumulator is provided in the first circuit; the first pump body is also used to fill the inlet of the accumulator with liquid through the first circuit, so that the accumulator is filled with liquid to a preset hydraulic pressure; the first pump body is used to pump liquid to the injection assembly through the second circuit, so as to provide hydraulic pressure to the injection assembly; the outlet of the accumulator is used to discharge liquid to the injection assembly through the first circuit, so as to provide hydraulic pressure to the injection assembly.

[0008] In one embodiment, the first circuit is further provided with a discharge valve group, which is located between the accumulator and the injection assembly; the discharge valve group is used to control the discharge of the accumulator.

[0009] In one embodiment, the discharge valve group is used to open the valve when the injection is started and when the flow demand of the injection assembly is greater than the rated flow of the first pump body; the discharge valve group is also used to close the valve when the flow demand of the injection assembly is less than or equal to the rated flow of the first pump body and during the pressure maintaining action.

[0010] In one embodiment, the first circuit is further provided with a filling valve group, which is located between the first pump body and the accumulator; the filling valve group is used to control the filling of the accumulator by the first pump body.

[0011] In one embodiment, the second circuit is provided with a one-way valve; the one-way valve is used to move the liquid in the second circuit from the first pump body to the injection assembly.

[0012] In one embodiment, the injection assembly includes an injection servo valve, an injection cylinder and an injection screw which are connected in sequence; one side of the injection servo valve is connected to the first circuit and the second circuit respectively.

[0013] In one embodiment, the injection molding machine includes a mold opening and closing assembly and a melt glue assembly; the mold opening and closing assembly is used for performing mold opening and closing operations, and the melt glue assembly is used for performing melt glue operations; the first pump body is also used to communicate with the mold opening and closing assembly and the melt glue assembly, and provide hydraulic pressure to the mold opening and closing assembly and the melt glue assembly.

[0014] In one embodiment, the accumulator-assisted servo injection system further includes a second pump body; the second pump body is connected to the accumulator; the second pump body is used to charge the accumulator with fluid so that the accumulator is charged with fluid to a preset hydraulic pressure.

[0015] In one embodiment, the accumulator is connected to the second pump body through a charging valve group; the charging valve group is also used to control the charging of the second pump body into the accumulator.

[0016] The present invention also provides an injection molding machine, comprising the above-mentioned accumulator-assisted servo injection system.

[0017] The technical solution of the present invention is applied to an injection molding machine by adopting an accumulator-assisted servo injection system; the accumulator-assisted servo injection system includes a first pump body, an accumulator and an injection assembly, and the injection assembly is used to perform injection operation under the action of hydraulic pressure; a first circuit and a second circuit connected in parallel to each other are provided between the first pump body and the injection assembly, and an accumulator is provided in the first circuit; the first pump body is also used to fill liquid to the inlet of the accumulator through the first circuit so that the accumulator is filled to a preset hydraulic pressure; the first pump body is used to pump liquid to the injection assembly through the second circuit to provide hydraulic pressure to the injection assembly; the outlet of the accumulator is used to discharge liquid to the injection assembly through the first circuit to provide hydraulic pressure to the injection assembly.

[0018] The present invention provides a first circuit and a second circuit between the first pump body and the injection assembly, and arranges the accumulator in the second circuit, thereby allowing the first pump body to supply liquid to the injection assembly alone through the first circuit, or the accumulator to supply liquid to the injection assembly alone through the second circuit, or the first pump body and the accumulator supply liquid to the injection assembly together to provide greater hydraulic pressure; in this way, not only a variety of hydraulic power supply modes can be realized, making the control more flexible, but also there is no need to provide multiple accumulators or set a large volume for the accumulator. Only a single or a small number of accumulators with moderate volumes are needed to supply sufficient hydraulic pressure for each action during the injection process, thereby reducing the manufacturing cost of the accumulator.

[0019] In addition, during the discharge process of the existing accumulator, the output pressure of the accumulator becomes lower and lower, causing the maximum output pressure of the rear stage of injection and the holding stage to drop, resulting in that the holding pressure of the actual injection assembly generally fails to reach the sample parameters of the standard injection molding machine (oil is supplied by the pump body alone); and the accumulator-assisted servo injection system can adopt different hydraulic power supply methods according to needs. When the accumulator discharge pressure drops, the first pump body can provide corresponding hydraulic pressure, so that the holding pressure of the injection assembly is not affected by the drop in the accumulator discharge pressure, and can maintain the same holding pressure parameters as the standard injection molding machine sample, and achieve a higher pressure holding action. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of an embodiment of an accumulator-assisted servo injection system provided by the present invention;

[0022] Figure 2 A schematic diagram of the working process of an embodiment of the accumulator-assisted servo injection system provided by the present invention.

[0023] Description of Figure Numbers:

[0024] 1. First pump body; 2. Accumulator; 3. Glue injection assembly; 31. Glue injection servo valve; 32. Glue injection cylinder; 33. Glue injection screw; 4. Liquid discharge valve group; 5. Liquid filling valve group; 6. Check valve; 7. Second pump body.

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] The accumulator servo injection system is a commonly used high-speed injection control solution for injection molding machines. It has the characteristics of high response and high speed. It is suitable for injection molding thin-walled injection molded products with high precision requirements.

[0030] The accumulator servo injection system is generally composed of an oil pump, a check valve, an accumulator, an injection servo valve, an injection cylinder, an injection screw, etc. Before the injection action, the oil pump first fills the accumulator with liquid to the set pressure through the check valve; during injection, the accumulator is discharged, and the pressure oil enters the injection cylinder through the injection servo valve, pushing the injection screw to complete the product molding.

[0031] However, in the existing accumulator servo injection system, the hydraulic oil required for the injection, pressure holding and release actions in the injection process is provided by the accumulator, resulting in the need for a larger accumulator volume or a combination of more accumulators to supply oil for each action in the injection process. Due to the high price of the accumulator, it results in a higher manufacturing cost.

[0032] Therefore, a new type of accumulator servo injection system is urgently needed to solve the problem in the existing accumulator servo injection system that a larger accumulator volume or a combination of multiple accumulators is required to supply sufficient hydraulic pressure for each action during the injection process.

[0033] Based on this, the present invention proposes an accumulator-assisted servo injection system.

[0034] See also Figure 1 and Figure 2 In one embodiment of the present invention, the accumulator-assisted servo injection system is applied to an injection molding machine; the accumulator-assisted servo injection system comprises a first pump body 1, an accumulator 2 and an injection assembly 3, the injection assembly 3 being used for performing injection operation under the action of hydraulic pressure; a first circuit and a second circuit connected in parallel to each other are provided between the first pump body 1 and the injection assembly 3, and an accumulator 2 is provided in the first circuit; the first pump body 1 is also used for filling the inlet of the accumulator 2 with liquid through the first circuit, so that the accumulator 2 is filled with liquid to a preset hydraulic pressure; the first pump body 1 is used for pumping liquid to the injection assembly 3 through the second circuit, so as to provide hydraulic pressure to the injection assembly 3; the outlet of the accumulator 2 is used for discharging liquid to the injection assembly 3 through the first circuit, so as to provide hydraulic pressure to the injection assembly 3.

[0035] The present invention provides a first circuit and a second circuit between the first pump body 1 and the injection assembly 3, and arranges the accumulator 2 in the second circuit, thereby allowing the first pump body 1 to supply liquid to the injection assembly 3 alone through the first circuit, or the accumulator 2 to supply liquid to the injection assembly 3 alone through the second circuit, or the first pump body 1 and the accumulator 2 to supply liquid to the injection assembly 3 together to provide greater hydraulic pressure; in this way, not only a variety of hydraulic power supply modes can be realized, making the control more flexible, but also there is no need to provide multiple accumulators 2 or set a large volume for the accumulator 2. Only a single or a small number of accumulators 2 with a moderate volume can be used to supply sufficient hydraulic pressure for each action during the injection process, thereby reducing the manufacturing cost of the accumulator 2.

[0036] In addition, during the discharge process of the existing accumulator, the output pressure of the accumulator becomes lower and lower, causing the maximum output pressure of the rear stage of injection and the holding stage to drop, resulting in that the holding pressure of the actual injection assembly generally fails to reach the sample parameters of the standard injection molding machine (oil is supplied by the pump body alone); and the accumulator-assisted servo injection system can adopt different hydraulic power supply methods according to needs. When the discharge pressure of the accumulator 2 drops, the first pump body 1 can provide corresponding hydraulic pressure, so that the holding pressure of the injection assembly 3 is not affected by the drop in the discharge pressure of the accumulator 2, and the same holding pressure parameters as the standard injection molding machine sample can be maintained, and a higher pressure holding action can be achieved.

[0037] In order to solve the problem of regulating the discharge of the accumulator 2, in the embodiment of the present invention, please refer to Figure 1 and Figure 2The first circuit is also provided with a discharge valve group 4, which is located between the accumulator 2 and the injection assembly 3; the discharge valve group 4 is used to control the discharge of the accumulator 2.

[0038] In this embodiment, a discharge valve group 4 is provided in the first circuit, and the discharge valve group 4 is located between the accumulator 2 and the injection assembly 3, so as to control the discharge of liquid from the accumulator 2 to the injection assembly 3.

[0039] In addition, in the existing accumulator servo injection system, when the discharge pressure of the accumulator 2 is lower than the inflation pressure during long-stroke injection, the discharge valve inside the accumulator 2 will automatically close, causing the injection action to be unable to proceed; at the same time, the frequent opening and closing of the discharge valve of the accumulator 2 will cause impact damage to the discharge valve, affecting the reliability and service life of the injection molding machine. In the present accumulator-assisted servo injection system, when the discharge pressure of the accumulator 2 is close to the inflation pressure, the discharge valve group 4 can be closed to prevent the accumulator 2 from frequently closing and causing a malfunction; at this time, the hydraulic supply to the injection assembly 3 can be completed by the first pump body 1 alone.

[0040] In an embodiment of the present invention, the discharge valve group 4 is used to open the valve when the injection is started and when the flow demand of the injection component 3 is greater than the rated flow of the first pump body 1; the discharge valve group 4 is also used to close the valve when the flow demand of the injection component 3 is less than or equal to the rated flow of the first pump body 1 and during the pressure maintaining action.

[0041] In this embodiment, since it is necessary to provide a larger hydraulic pressure to the injection assembly 3 when the injection is started and when the flow demand of the injection assembly 3 is greater than the rated flow of the first pump body 1 (usually this situation occurs when the injection assembly 3 performs high-speed injection), the valve of the liquid discharge valve group 4 is opened in these two scenarios, so that the accumulator 2 can supply liquid to the injection assembly 3 through the first circuit and the first pump body 1 can supply liquid to the injection assembly 3 through the second circuit, thereby achieving the effect that the injection assembly 3 and the first pump body 1 simultaneously provide hydraulic pressure to the injection assembly 3, ensuring that the injection assembly 3 has sufficient hydraulic supply when the injection is started and when the flow demand of the injection assembly 3 is greater than the rated flow of the first pump body 1. When the flow demand of the injection assembly 3 is less than or equal to the rated flow of the first pump body 1 (corresponding to the case where the injection assembly 3 performs low-speed injection) and when the pressure is maintained, the hydraulic pressure demand of the injection assembly 3 is small. Therefore, by closing the valve of the discharge valve group 4 in these two scenarios, only the first pump body 1 is allowed to supply liquid to the injection assembly 3 through the second circuit, thereby providing sufficient hydraulic pressure; and at this time, the accumulator 2 can also be filled with liquid when the liquid is not discharged, so that the hydraulic pressure in the accumulator 2 is restored to the preset hydraulic pressure.

[0042] In order to solve the problem that the accumulator 2 is difficult to be filled to the preset hydraulic pressure, in the embodiment of the present invention, refer to Figure 1 and Figure 2The first circuit is also provided with a filling valve group 5, which is located between the first pump body 1 and the accumulator 2; the filling valve group 5 is used to control the filling of the accumulator 2 by the first pump body 1.

[0043] In this embodiment, a filling valve group 5 is provided in the first circuit, and the filling valve group 5 is located between the first pump body 1 and the accumulator 2, so that the filling pressure is adjusted by the filling valve group 5 to ensure that the pressure in the accumulator 2 reaches the preset hydraulic pressure, which can prevent the hydraulic pressure in the accumulator 2 from being lower than the preset hydraulic pressure, resulting in the injection assembly 3 being unable to obtain sufficient hydraulic pressure, and can also prevent the hydraulic pressure in the accumulator 2 from being too high, resulting in safety hazards.

[0044] In order to solve the problem of the liquid in the second circuit flowing back to the first pump body 1, in the embodiment of the present invention, refer to Figure 1 and Figure 2 The second circuit is provided with a one-way valve 6; the one-way valve 6 is used to move the liquid in the second circuit from the first pump body 1 to the injection assembly 3. In this way, by providing the one-way valve 6 in the second circuit, the one-way valve 6 is used to move the liquid in the second circuit from the first pump body 1 to the injection assembly 3, thereby avoiding the liquid in the second circuit from flowing back to the first pump body 1, and ensuring the stability of the hydraulic supply to the injection assembly 3.

[0045] In order to solve the problem of how to realize injection control, in the embodiment of the present invention, please refer to Figure 1 and Figure 2 The injection assembly 3 includes an injection servo valve 31, an injection cylinder 32 and an injection screw 33 which are connected in sequence; one side of the injection servo valve 31 is connected to the first circuit and the second circuit respectively. In this way, the injection servo valve 31 receives the liquid supply from the first circuit and the second circuit, and controls the hydraulic pressure and flow rate of the liquid flowing to the injection cylinder 32, and then the injection cylinder 32 converts the hydraulic pressure into mechanical force to drive the injection screw 33 to move, thereby completing the injection action.

[0046] In an embodiment of the present invention, the injection molding machine includes a mold opening and closing assembly and a melt glue assembly; the mold opening and closing assembly is used for mold opening and closing operations, and the melt glue assembly is used for melt glue operations. Further, in order to solve the problem that the injection molding machine needs hydraulic supply during mold opening and closing and melt glue processes, in an embodiment of the present invention, the first pump body 1 is also used to communicate with the mold opening and closing assembly and the melt glue assembly, and provide hydraulic pressure to the mold opening and closing assembly and the melt glue assembly, so that the mold opening and closing assembly and the melt glue assembly can realize mold opening and closing and melt glue operations.

[0047] Furthermore, if the injection molding product requires a shorter molding cycle and a shorter filling time, it is difficult to meet the demand by only relying on the first pump body 1 and the accumulator 2 for liquid supply. To solve the above problem, in the embodiment of the present invention, please refer to Figure 1 and Figure 2The accumulator-assisted servo injection system also includes a second pump body 7; the second pump body 7 is connected to the accumulator 2; the second pump body 7 is used to fill the accumulator 2 with liquid so that the accumulator 2 is filled with liquid to a preset hydraulic pressure.

[0048] In this embodiment, an additional second pump body 7 is provided, and the second pump body 7 is connected to the accumulator 2 separately, so as to charge the accumulator 2 separately, thereby increasing the hydraulic pressure and flow rate that the first circuit can provide, thereby shortening the molding cycle and filling time of the injection molding product, and improving the injection molding efficiency. Of course, if the hydraulic pressure and filling efficiency that the first pump body 1 and the accumulator 2 can provide can meet the molding cycle requirements of the injection molding product, the second pump body 7 can also be eliminated to save costs and energy consumption.

[0049] Furthermore, in order to solve the problem that it is difficult to control the second pump body 7 to charge the accumulator 2 to a preset hydraulic pressure, in an embodiment of the present invention, refer to Figure 1 and Figure 2 The accumulator 2 is connected to the second pump body 7 through the charging valve group 5; the charging valve group 5 is also used to control the charging of the second pump body 7 to the accumulator 2. In this way, by making the charging valve group 5 also connected to the second pump body 7, the charging valve group 5 is used to adjust the pressure of the second pump body 7 to charge the accumulator 2, ensuring that the pressure in the accumulator 2 reaches the preset hydraulic pressure, which can prevent the hydraulic pressure in the accumulator 2 from being lower than the preset hydraulic pressure, resulting in the injection assembly 3 being unable to obtain sufficient hydraulic pressure, and can also prevent the hydraulic pressure in the accumulator 2 from being too high, resulting in safety hazards.

[0050] In the embodiments of the present invention, please refer to Figure 1 and Figure 2 The accumulator 2 is connected to the second pump body 7 through the charging valve group 5; the charging valve group 5 is also used to control the charging of the second pump body 7 to the accumulator 2. In this way, by making the charging valve group 5 also connected to the second pump body 7, the charging valve group 5 is used to adjust the pressure of the second pump body 7 to charge the accumulator 2, ensuring that the pressure in the accumulator 2 reaches the preset hydraulic pressure, which can prevent the hydraulic pressure in the accumulator 2 from being lower than the preset hydraulic pressure, resulting in the injection assembly 3 being unable to obtain sufficient hydraulic pressure, and can also prevent the hydraulic pressure in the accumulator 2 from being too high, resulting in safety hazards.

[0051] The present invention also proposes an injection molding machine, which includes the accumulator-assisted servo injection system in any of the above-mentioned embodiments. The specific structure of the accumulator-assisted servo injection system refers to the above-mentioned embodiments. Since the injection molding machine adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0052] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An accumulator-assisted servo injection system, applied to an injection molding machine; characterized in that: The accumulator-assisted servo injection system comprises: A first pump body; Accumulator; A glue injection assembly, the glue injection assembly is used to perform glue injection operation under the action of hydraulic pressure; A first circuit and a second circuit connected in parallel to each other are provided between the first pump body and the injection assembly, and the accumulator is provided in the first circuit; The first pump body is also used to fill the inlet of the accumulator with liquid through the first circuit, so that the accumulator is filled with liquid to a preset hydraulic pressure; the first pump body is used to pump liquid to the injection assembly through the second circuit, so as to provide hydraulic pressure to the injection assembly; The outlet of the accumulator is used to discharge liquid to the injection molding assembly through the first circuit to provide hydraulic pressure to the injection molding assembly.

2. The accumulator-assisted servo injection system according to claim 1, characterized in that: The first circuit is also provided with a discharge valve group, and the discharge valve group is located between the accumulator and the injection assembly; the discharge valve group is used to control the discharge of the accumulator.

3. The accumulator-assisted servo injection system according to claim 2, characterized in that: The liquid discharge valve group is used to open the valve when the injection is started and when the flow demand of the injection assembly is greater than the rated flow of the first pump body; The discharge valve group is also used to close the valve when the flow demand of the injection assembly is less than or equal to the rated flow of the first pump body and during the pressure maintaining action.

4. The accumulator-assisted servo injection system according to claim 2, characterized in that: The first circuit is also provided with a filling valve group, and the filling valve group is located between the first pump body and the accumulator; the filling valve group is used to control the filling of the accumulator by the first pump body.

5. The accumulator-assisted servo injection system according to claim 1, characterized in that: The second circuit is provided with a one-way valve; the one-way valve is used to move the liquid in the second circuit from the first pump body to the injection assembly.

6. The accumulator-assisted servo injection system according to claim 1, characterized in that: The injection assembly comprises an injection servo valve, an injection cylinder and an injection screw which are connected in sequence; One side of the injection servo valve is communicated with the first circuit and the second circuit respectively.

7. The accumulator-assisted servo injection system according to claim 4, characterized in that: The injection molding machine comprises a mold opening and closing component and a melt glue component; the mold opening and closing component is used for performing mold opening and closing operations, and the melt glue component is used for performing melt glue operations; The first pump body is also used to communicate with the mold opening and closing assembly and the melt adhesive assembly, and provide hydraulic pressure to the mold opening and closing assembly and the melt adhesive assembly.

8. The accumulator-assisted servo injection system according to claim 7, characterized in that: The accumulator-assisted servo injection system further includes a second pump body; the second pump body is connected to the accumulator; The second pump body is used to charge the accumulator with fluid, so that the accumulator is charged with fluid to a preset hydraulic pressure.

9. The accumulator-assisted servo injection system according to claim 8, characterized in that: The accumulator is connected to the second pump body through the filling valve group; the filling valve group is also used to control the filling of the accumulator by the second pump body.

10. An injection molding machine, characterized in that: It comprises the accumulator-assisted servo injection system as claimed in any one of claims 1 to 9.

Images