Energy accumulator auxiliary servo injection system and injection molding machine

Abstract

The utility model 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 action of hydraulic pressure; 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 utility model, 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 by only needing a smaller energy accumulator volume or combining fewer energy accumulators.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, 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, and is suitable for injection molding thin-walled injection molded products with high precision requirements.

[0003] The accumulator servo injection system generally consists of an oil pump, a one-way valve, an accumulator, an injection servo valve, an injection cylinder, and an injection screw. Before injection, the oil pump first fills the accumulator with fluid to the set pressure through the one-way valve. During injection, the accumulator is discharged, and the pressurized 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 injection, pressure holding and release actions in the injection process is all 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 higher manufacturing costs.

[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. Utility Model Content

[0006] The main purpose of the utility model is to propose an accumulator-assisted servo injection system and an injection molding machine, aiming to solve the problem in existing accumulator-assisted servo injection systems 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 objectives, the utility model proposes an accumulator-assisted servo injection system for use in an injection molding machine; the accumulator-assisted servo injection system includes a first pump body, an accumulator, and an injection assembly, the injection assembly being used to perform an 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 further used to charge liquid to the inlet of the accumulator through the first circuit so that the accumulator is charged 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.

[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 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 charging valve group, which is located between the first pump body and the accumulator; the charging valve group is used to control the charging of liquid from the first pump body to the accumulator.

[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 molding assembly includes an injection servo valve, an injection cylinder, and an injection screw that are sequentially connected; 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 to perform mold opening and closing operations, and the melt glue assembly is used to perform 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 to fill the accumulator 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 liquid from the second pump body to the accumulator.

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

[0017] The technical solution of the utility model 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 an 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 further used to charge liquid to the inlet of the accumulator through the first circuit, so that the accumulator is charged 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 utility model 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 alone to supply liquid to the injection assembly through the first circuit, or the accumulator alone to supply liquid to the injection assembly through the second circuit, or the first pump body and the accumulator together to supply liquid to the injection assembly to provide greater hydraulic pressure; in this way, not only can a variety of hydraulic power supply modes 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 volume are required to achieve 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 accumulator output pressure becomes lower and lower, causing the maximum output pressure of the rear section of the injection and the pressure holding section to drop, resulting in the actual pressure holding pressure of the injection assembly generally failing to reach the sample parameters of the standard injection molding machine (oil is supplied by the pump body alone); however, since the accumulator-assisted servo injection system can adopt different hydraulic power supply methods according to needs, the first pump body can provide corresponding hydraulic pressure when the accumulator discharge pressure drops, so that the pressure holding pressure of the injection assembly is not affected by the drop in the accumulator discharge pressure, and can maintain the same pressure holding parameters as the standard injection molding machine sample, achieving 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0021] Figure 1 This is a structural diagram of an embodiment of the accumulator-assisted servo injection system provided by the utility model;

[0022] Figure 2 This is 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. Injection assembly; 31. Injection servo valve; 32. Injection cylinder; 33. Injection screw; 4. Discharge valve group; 5. 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 embodiments described 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 making creative efforts shall fall 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 indications 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 for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. 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 mutually contradictory or cannot be implemented, it should be deemed that such a 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, and is suitable for injection molding thin-walled injection molded products with high precision requirements.

[0030] The accumulator servo injection system generally consists of an oil pump, a one-way valve, an accumulator, an injection servo valve, an injection cylinder, and an injection screw. Before injection, the oil pump first fills the accumulator with fluid to the set pressure through the one-way valve. During injection, the accumulator is discharged, and the pressurized 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 injection, pressure holding and release actions in the injection process is all 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 higher manufacturing costs.

[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 utility model proposes an accumulator-assisted servo injection system.

[0034] See also Figure 1 and Figure 2 In one embodiment of the utility model, the accumulator-assisted servo injection system is applied to an injection molding machine; the accumulator-assisted servo injection system includes a first pump body 1, an accumulator 2 and an injection assembly 3, and the injection assembly 3 is used to perform an 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 the accumulator 2 is provided in the first circuit; the first pump body 1 is also used to charge the inlet of the accumulator 2 through the first circuit so that the accumulator 2 is charged to a preset hydraulic pressure; the first pump body 1 is used to pump liquid to the injection assembly 3 through the second circuit to provide hydraulic pressure to the injection assembly 3; the outlet of the accumulator 2 is used to discharge liquid to the injection assembly 3 through the first circuit to provide hydraulic pressure to the injection assembly 3.

[0035] The utility model 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 alone to supply liquid to the injection assembly 3 through the first circuit, or the accumulator 2 alone to supply liquid to the injection assembly 3 through the second circuit, or the first pump body 1 and the accumulator 2 together to supply liquid to the injection assembly 3 to provide greater hydraulic pressure; in this way, not only can a variety of hydraulic power supply modes 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 are required to achieve 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 section of the injection and the holding section to drop, resulting in the actual holding pressure of the injection assembly generally failing to reach the sample parameters of the standard injection molding machine (oil is supplied by the pump body alone); however, since the accumulator-assisted servo injection system can adopt different hydraulic power supply methods as needed, the first pump body 1 can provide corresponding hydraulic pressure when the discharge pressure of the accumulator 2 drops, 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 can maintain the same holding pressure parameters as the standard injection molding machine sample, achieving a higher pressure holding action.

[0037] To solve the problem of the liquid discharge control of the accumulator 2, in the embodiment of the utility model, please refer to Figure 1 and Figure 2 , the first circuit is further provided with a liquid discharge valve group 4, and the liquid discharge valve group 4 is located between the accumulator 2 and the glue injection assembly 3; the liquid discharge valve group 4 is used for controlling the liquid discharge of the accumulator 2.

[0038] In the embodiment, by providing the liquid discharge valve group 4 in the first circuit, the liquid discharge valve group 4 is located between the accumulator 2 and the glue injection assembly 3, so that the control of the liquid discharge of the accumulator 2 to the glue injection assembly 3 is realized.

[0039] In addition, in the existing accumulator servo glue injection system, when the liquid discharge pressure of the accumulator 2 is lower than the inflation pressure during long-stroke glue injection, the oil discharge valve in the accumulator 2 is automatically closed, causing the glue injection action to be unable to be performed; meanwhile, the frequent opening and closing of the oil discharge valve of the accumulator 2 can cause impact damage of the oil discharge valve, affecting the reliability and service life of the injection molding machine. In the accumulator auxiliary servo glue injection system, when the liquid discharge pressure of the accumulator 2 is close to the inflation pressure, the liquid discharge valve group 4 can be closed, so that the failure caused by the frequent closing of the accumulator 2 is prevented; at this time, the hydraulic supply to the glue injection assembly 3 can be completed by the first pump body 1 alone.

[0040] In the embodiment of the utility model, the liquid discharge valve group 4 is used for opening the valve when the glue injection is started and when the flow demand of the glue injection assembly 3 is greater than the rated flow of the first pump body 1; the liquid discharge valve group 4 is also used for closing the valve when the flow demand of the glue injection assembly 3 is less than or equal to the rated flow of the first pump body 1 and during the pressure maintaining action.

[0041] In the embodiment, since a larger hydraulic pressure needs to be provided to the glue injection assembly 3 when the glue injection is started and when the flow demand of the glue injection assembly 3 is greater than the rated flow of the first pump body 1 (this situation usually occurs when the glue injection assembly 3 performs high-speed glue injection), the valve of the liquid discharge valve group 4 is opened in these two scenarios, so that the accumulator 2 supplies liquid to the glue injection assembly 3 through the first circuit, and the first pump body 1 supplies liquid to the glue injection assembly 3 through the second circuit, realizing the effect that the glue injection assembly 3 and the first pump body 1 simultaneously provide hydraulic pressure to the glue injection assembly 3, and ensuring that the glue injection assembly 3 has sufficient hydraulic supply when the glue injection is started and when the flow demand of the glue injection assembly 3 is greater than the rated flow of the first pump body 1. When the flow demand of the glue injection assembly 3 is less than or equal to the rated flow of the first pump body 1 (corresponding to the case that the glue injection assembly 3 performs low-speed glue injection), and during the pressure maintaining action, the hydraulic demand of the glue injection assembly 3 is small, so that by closing the valve of the liquid discharge valve group 4 in these two scenarios, only the first pump body 1 supplies liquid to the glue injection assembly 3 through the second circuit, so as to provide sufficient hydraulic pressure; and at this time, the accumulator 2 can also be filled with liquid when not discharging liquid, so as to restore the hydraulic pressure in the accumulator 2 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 utility model, please refer to Figure 1 and Figure 2 The first circuit is also provided with a charging valve group 5, which is located between the first pump body 1 and the accumulator 2; the charging valve group 5 is used to control the charging of the accumulator 2 by the first pump body 1.

[0043] In this embodiment, a charging valve group 5 is provided in the first circuit and located between the first pump body 1 and the accumulator 2. The charging valve group 5 is used to adjust the charging pressure to ensure that the pressure in the accumulator 2 reaches the preset hydraulic pressure. This 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, which may cause 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 utility model, please 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 preventing the liquid in the second circuit from flowing back to the first pump body 1, and ensuring the stability of the hydraulic pressure 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 utility model, 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 sequentially connected. One side of the injection servo valve 31 is connected to the first and second circuits, respectively. Thus, the injection servo valve 31 receives fluid from the first and second circuits and controls the hydraulic pressure and flow rate of the fluid flowing to the injection cylinder 32. The injection cylinder 32 then converts the hydraulic pressure into mechanical force, driving the injection screw 33 to move, completing the injection process.

[0046] In an embodiment of the present invention, the injection molding machine includes a mold opening and closing assembly and a glue melting assembly; the mold opening and closing assembly is used to perform mold opening and closing operations, and the glue melting assembly is used to perform glue melting operations. Furthermore, to address the problem of the injection molding machine requiring hydraulic pressure during the mold opening and closing and glue melting 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 glue melting assembly and provide hydraulic pressure to the mold opening and closing assembly and the glue melting assembly so that the mold opening and closing assembly and the glue melting assembly can perform mold opening and closing and glue melting 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 utility model, please refer to Figure 1 and Figure 2 The accumulator-assisted servo injection system further 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 charge the accumulator 2 so that the accumulator 2 is charged to a preset hydraulic pressure.

[0048] In this embodiment, an additional second pump body 7 is provided, and the second pump body 7 is independently connected to the accumulator 2, thereby independently charging the accumulator 2. This increases the hydraulic pressure and flow rate provided by the first circuit, thereby shortening the molding cycle and filling time of the injection molded product, and improving injection efficiency. Of course, if the hydraulic pressure and filling efficiency provided by the first pump body 1 and accumulator 2 can meet the molding cycle requirements of the injection molded product, the second pump body 7 can be eliminated to save costs and energy consumption.

[0049] Furthermore, in order to solve the problem of difficulty in controlling the second pump body 7 to charge the accumulator 2 to the preset hydraulic pressure, in the embodiment of the present utility model, please refer to Figure 1 and Figure 2 The accumulator 2 is connected to the second pump body 7 via the charging valve group 5; the charging valve group 5 is also used to control the charging of the accumulator 2 by the second pump body 7. In this way, by connecting the charging valve group 5 to the second pump body 7, the charging valve group 5 can be used to adjust the pressure of the second pump body 7 charging the accumulator 2, ensuring that the pressure in the accumulator 2 reaches the preset hydraulic pressure. This can prevent the hydraulic pressure in the accumulator 2 from falling below the preset hydraulic pressure, resulting in the injection assembly 3 not being able to obtain sufficient hydraulic pressure, and can also avoid the hydraulic pressure in the accumulator 2 being too high, which may cause 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 via the charging valve group 5; the charging valve group 5 is also used to control the charging of the accumulator 2 by the second pump body 7. In this way, by connecting the charging valve group 5 to the second pump body 7, the charging valve group 5 can be used to adjust the pressure of the second pump body 7 charging the accumulator 2, ensuring that the pressure in the accumulator 2 reaches the preset hydraulic pressure. This can prevent the hydraulic pressure in the accumulator 2 from falling below the preset hydraulic pressure, resulting in the injection assembly 3 not being able to obtain sufficient hydraulic pressure, and can also avoid the hydraulic pressure in the accumulator 2 being too high, which may cause safety hazards.

[0051] The present utility model 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 this injection molding machine adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0052] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An accumulator-assisted servo injection system, used in injection molding machines; characterized in that: The accumulator-assisted servo injection system includes: 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 further used to charge the inlet of the accumulator through the first circuit so that the accumulator is charged 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 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 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.

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 liquid discharge valve group is further 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 further provided with a liquid charging valve group, which is located between the first pump body and the accumulator; the liquid charging valve group is used to control the charging of liquid from the first pump body to the accumulator.

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 allow the liquid in the second circuit to move 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 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 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 includes 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 further 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 charging valve group; the charging valve group is also used to control the charging of liquid from the second pump body to the accumulator.

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

Images