JP2012101259A - Electric die-casting machine with core-driving hydraulic unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric die-casting machine with a core-driving hydraulic unit, the electric die-casting machine being configured in a manner such that, although the electric die-casting machine has the hydraulic unit, the electric die-casting machine does not require a large installation area and the maintainability of the electric die-casting machine is not compromised.SOLUTION: The suitable core-driving hydraulic unit 31 is configured by integrating together an oil tank 33, a hydraulic pump 34, a hydraulic pump-driving motor 35, an accumulator 36, an oil cooler 37, valves 38 including a solenoid directional control valve, an oil cleaner 39, an electric box 40 etc. in such a manner that such components are disposed on a base plate 32 doubling as an oil pan. The core-driving hydraulic unit 31 is affixed to a predetermined position on a main base board 2 in such a manner that the hydraulic pump 34 and the hydraulic pump-driving motor 35 are located below a mold-clamping electric servomotor 22 and the remaining components are located at a side of the mold-clamping electric servomotor 22.

Description

  The present invention relates to an electric die casting machine including a core driving hydraulic unit, and more particularly to an arrangement and mounting structure of a core driving hydraulic unit with respect to the electric die casting machine.

  Die-casting machine is to inject and fill molten metal material (molten metal) such as aluminum alloy or magnesium alloy into the cavity formed in the mold to cast a product of a predetermined shape, injection using resin as molding material Compared to a molding machine, the injection speed and injection pressure are higher in each stage. Therefore, in the past, hydraulic machines that hydraulically drive the injection plunger and the mold opening / closing mechanism have been mainstream. However, in recent years, contamination in the molding factory due to hydraulic oil can be avoided. An electric machine that uses an electric motor to drive the plunger and the mold opening / closing mechanism is also becoming widespread (see, for example, Patent Documents 1 and 2).

  By the way, also in the die-casting machine, a product having a hollow portion can be formed by disposing a core having a predetermined shape in the cavity so as to be freely inserted and exited, similarly to the injection molding machine. However, since the die casting machine uses a metal material having a large solidification shrinkage and high rigidity after solidification as a molding material, an injection molding machine using a resin whose molding solidification shrinkage is relatively small and which is easily elastically deformed after solidification. On the other hand, the core is easily fixed to the molded product in the cavity, and a large force is required to pull out the core from the cavity. For this reason, conventionally, even in an electric machine, a hydraulic cylinder capable of obtaining a high-pressure and high-speed extraction force has been used as a drive source for the core (see, for example, Patent Document 3).

  In the hydraulic die casting machine, a hydraulic unit for driving the injection plunger is provided, so this can be shared as a core driving hydraulic unit. However, in the electric die casting machine, there is a sharable hydraulic unit. Therefore, it is necessary to separately provide a core driving hydraulic unit. Some types of electric die casting machines use the hydraulic pressure stored in the accumulator as auxiliary power for the injection plunger, but the hydraulic unit provided in this type of electric die casting machine is equipped with a hydraulic die casting machine. Since the output is much lower than that of a hydraulic unit, it cannot be shared with a core driving hydraulic unit. The applicant of the present application, as a core driving hydraulic unit provided in these electric die casting machines, is independent of the electric die casting machine by integrating the required hydraulic equipment and electric equipment into the storage case. A device that is formed separately and can be appropriately attached in the vicinity of an electric die casting machine installed in a molding factory has been proposed (Japanese Patent Application No. 2009-200688).

  The core driving hydraulic unit previously proposed by the applicant of the present application is configured by storing required hydraulic equipment and electrical equipment in a storage case formed separately from the electric die casting machine. It is not necessary to incorporate hydraulic equipment or electric equipment that constitutes the hydraulic unit in the die casting machine, and the structure of the electric die casting machine can be simplified. Moreover, when the product using the core is not manufactured, it can be separated from the electric die casting machine and stored elsewhere, which is reasonable.

JP 2000-84654 A JP 2001-1126 A JP 2006-289410 A

  However, the core driving hydraulic unit previously proposed by the applicant of the present application is formed separately from the electric die casting machine and is installed in the vicinity of the electric die casting machine as necessary. There is a problem that the total installation area of the hydraulic unit and the electric die casting machine is increased. In addition, since a large hydraulic unit is installed in the vicinity of the electric die casting machine, there is a problem that maintenance of the electric die casting machine becomes difficult. Furthermore, since the hydraulic unit is large, there is a problem that it takes a lot of labor for movement when a product using a core is not manufactured, and requires a large space for storage.

  The present invention has been made to solve the above-described problems of the prior art. Even when a hydraulic unit is provided, the installation area of the electric die casting machine is not increased, and maintenance of the electric die casting machine is performed. It is an object of the present invention to provide an electric die casting machine including a core driving hydraulic unit that is easy to move and store without impairing performance.

  In order to solve the above-mentioned problems, the present invention provides a main base board, a mold clamping mechanism mounted on the main base board, which opens and closes a mold using an electric servo motor for mold clamping as a drive source, and the main base. An injection mechanism that is mounted on the panel and injects molten metal into the mold using an injection electric servo motor as a drive source, a hydraulic cylinder for driving a core attached to the mold, and pressure oil in the hydraulic cylinder The core drive hydraulic unit includes at least an oil tank, a hydraulic pump, a hydraulic pump drive motor, an oil cooler, valves, and an electric box. It is configured by assembling a plurality of devices integrally on a base plate, and the base plate is placed on the front side outside the set position of the mold clamping mechanism. By fixing to the main base surface plate and each of said plurality of devices and configured that arranged around the mold clamping electric servomotor.

  According to such a configuration, various hydraulic devices and electric devices constituting the core driving hydraulic unit are assembled integrally on the base plate, and the base plate is fixed on the main base panel outside the setting position of the mold clamping mechanism. Various hydraulic and electrical devices assembled on this base plate are placed around the electric servomotor for mold clamping, so there is no need to change the basic design of the electric die casting machine, and the electric servo for mold clamping It is possible to set the core driving hydraulic unit by effectively using the empty space around the motor. Therefore, even if a core drive hydraulic unit is provided, the total installation area of the electric die casting machine does not increase, and the installation of the electric die casting machine with the core drive hydraulic unit in the molding plant is facilitated. can do. In addition, since the base plate in which various hydraulic devices and electric devices constituting the core driving hydraulic unit are integrally assembled is fixed at a predetermined position on the main base board, the core driving hydraulic unit for the electric die casting machine Can be easily attached and detached, maintainability of the electric die casting machine can be maintained, and movement and storage of the core driving hydraulic unit can be facilitated.

  According to the present invention, in the electric die casting machine including the core driving hydraulic unit having the above-described configuration, each device constituting the core driving hydraulic unit is connected to a side portion and a lower portion of the electric servomotor for mold clamping. It was configured to be distributed in the part.

  Some devices that constitute the core driving hydraulic unit have a large height such as an oil tank or an oil cooler, for example, and a small height such as an electric motor for driving a hydraulic pump. There are also things. Therefore, if the height dimension is large, it will be placed in the side part of the mold clamping electric servo motor. If the height dimension is small, it will be placed in the lower part of the mold clamping electric servo motor. The space around the mold clamping electric servomotor can be effectively used while preventing the interference between the mold clamping electric servomotor and the mold clamping electric servomotor.

  According to the present invention, in the electric die casting machine including the core driving hydraulic unit having the above-described configuration, the base plate receives hydraulic oil leaked from the core driving hydraulic unit and prevents the hydraulic fluid from flowing out. It is configured to double as an oil pan.

  According to such a configuration, by using the base plate that also serves as the oil pan, it is possible to prevent the hydraulic oil leaking from the core driving hydraulic unit from flowing out to the outside, and therefore, it is possible to effectively prevent contamination due to the hydraulic oil in the molding factory. .

  According to the present invention, since various hydraulic devices and electrical devices constituting the core driving hydraulic unit are arranged in the empty space around the mold clamping electric servo motor, the core driving hydraulic unit is provided. In addition, the installation area of the electric die casting machine can be prevented from increasing, and the electric die casting machine equipped with the core driving hydraulic unit in the molding factory can be easily installed. In addition, since the core drive hydraulic unit assembled on the base plate is detachably fixed at a predetermined position on the main base panel, it is easy to attach and remove the core drive hydraulic unit to the electric die casting machine. The maintenance of the electric die casting machine can be maintained, and the movement and storage of the core driving hydraulic unit can be facilitated.

It is a perspective view which shows the state which isolate | separated the core drive hydraulic unit for the electric die-casting machine which concerns on embodiment. FIG. 3 is a hydraulic circuit diagram of the core driving hydraulic unit according to the embodiment. It is a table | surface figure which shows operation | movement of the electric die-casting machine which concerns on embodiment. It is a top view of the hydraulic unit for core drive concerning an embodiment. It is the side view seen from the A direction of FIG. It is the side view seen from the B direction of FIG. It is the side view seen from the C direction of FIG. It is a principal part top view of the electric die-casting machine which concerns on embodiment with which the core drive hydraulic unit was attached. It is the end view seen from the core drive hydraulic unit side of the electric die-casting machine concerning an embodiment with which the core drive hydraulic unit was attached.

  Hereinafter, an embodiment of an electric die casting machine including a core driving hydraulic unit according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the electric die casting machine 1 according to the present embodiment includes a main base board 2, a mold clamping unit 21 mounted on the main base board 2, a main base board 2, and a mold clamping unit 21. The held injection unit 11, a mold (not shown) attached to the mold clamping unit 21, a core driving hydraulic cylinder (see FIG. 2) provided in the mold, and the middle attached to the mold clamping unit 21 It is mainly composed of a slave unit 8 and a core driving hydraulic unit 31 that is detachably mounted on the main base board 2.

  A set of molds composed of a fixed mold and a movable mold is provided with a predetermined number of cores having a predetermined shape and dimensions so that the molds can be inserted and removed. A cavity having a predetermined shape corresponding to the external shape of the product is formed in the mold. Each of these cores is driven by driving a hydraulic cylinder provided in the mold, and the hydraulic cylinder is provided with pressure oil supplied from the core driving hydraulic unit 31 in the core unit 8. It is driven by controlling with a control valve or the like. The configuration and operation of the core unit 8 and the core driving hydraulic unit 31 will be described later with reference to FIG.

  The injection unit 11 includes a support member 3 attached to the fixed die plate 5, a base member 12 held on the support member 3 and the main base board 2, a holding block 13 fixed to the base member 12, and a holding block And a ball screw mechanism (not shown) comprising an injection electric servo motor 14 fixed to the motor 13, a ball screw shaft for converting the rotary motion of the injection electric servo motor 14 into a linear motion, and a nut body screwed to the shaft. A rotation transmission mechanism (not shown) such as a pulley and a belt for transmitting the rotation of the electric servomotor 14 for injection, a moving body 15 that moves forward and backward on the base member 12 integrally with a nut body of a ball screw mechanism, and a fixed die plate The injection sleeve 16 fixed to 5 and one end fixed to the moving body 15 and the other end arranged in the injection sleeve 16 so as to be movable back and forth. The injection plunger 17 for the molten metal injection which is provided with an accumulator 18 for imparting an auxiliary driving force to the injection plunger 17.

  The mold clamping unit 21 includes a tail stock 4 and a fixed die plate 5 which are mounted on the main base board 2 so as to be opposed to each other at a predetermined interval, and a plurality of the clamp units 21 connected to both ends of the tail stock 4 and the fixed die plate 5. Tie bar 6, slidably attached to tie bar 6, movable die plate 7 moving forward and backward between tail stock 4 and fixed die plate 5, and mold clamping electric servo attached to the outer surface of tail stock 4 A motor 9 and a ball screw mechanism (not shown) that converts the rotation of the mold clamping electric servo motor 9 into a forward and backward movement of a moving body (not shown) and a movable die plate 7 driven in the mold opening / closing direction are driven by the moving body (not shown). The toggle mechanism 10 is provided.

  The main base board 2 is formed in a size that allows all the above-described components to be mounted on its upper surface, and one end in the length direction extends to a position that substantially reaches the outer surface of the holding block 13. The end substantially extends to a position reaching the outer end of the mold clamping electric servomotor 9. The width dimension of the mold clamping electric servo motor 9 including the power transmission mechanism is smaller than the width dimension of the main base panel 2, and the height dimension of the mold clamping electric servo motor 9 including the power transmission mechanism is equal to that of the tailstock 4. It is smaller than the height dimension. Therefore, the peripheral portion of the mold clamping electric servo motor 9 above the main base board 2 is an empty space in which any member can be placed.

  The core driving hydraulic unit 31 includes an oil tank 33, a hydraulic pump 34, a hydraulic pump driving motor 35, an accumulator 36, an oil cooler on a base plate 32 that also serves as an oil pan, as shown in FIGS. 37, a valve 38 including an electromagnetic direction switching valve, an oil cleaner 39, an electric box 40, and the like are integrally assembled. As shown in FIGS. 4 and 7, the hydraulic pump 34 and the hydraulic pump drive motor 35 having a small height are arranged side by side on one side of the base plate 32, and an accumulator 36 and an oil cooler 37 having a large height are provided. The base plate 32 is arranged in a concentrated manner on the other side. In the present embodiment, the valves 38 and the accumulator 36 are arranged one above the other, and the oil tank 33, the oil cooler 37, the oil cleaner 39, and the electric box 40 are arranged one above the other so as to form the base plate. The arrangement of each member in 32 is integrated. As shown in FIGS. 8 and 9, the core drive hydraulic unit 31 of this example configured as described above includes a hydraulic pump 34 and a hydraulic pump drive motor 35 disposed below the mold clamping electric servomotor 22. In addition, the base plate 32 is fixed at a predetermined position on the main base board 2 so that other devices are arranged on the side of the electric servomotor 9 for mold clamping. Thereby, the electric die-casting machine provided with the core driving hydraulic unit is assembled. In addition, the code | symbol 60 of FIG.8 and FIG.9 has shown the grease lubrication apparatus.

  As described above, in the core driving hydraulic unit 31 of this example, when the base plate 32 is fixed at a predetermined position on the main base panel 2, the components constituting the core driving hydraulic unit 31 are clamped. Since it is arranged in the empty space around the electric servomotor 9 without interfering with the electric servomotor 9 for clamping, the installation area of the electric diecast machine 1 is provided even when the core driving hydraulic unit 31 is provided. The size is not increased. Further, in the core driving hydraulic unit 31 of the present example, since each device is arranged on the base plate 32 that also serves as an oil pan, the hydraulic oil leaking from the hydraulic device does not flow out to the outside, but by the hydraulic oil in the molding factory. Dirt can be prevented. Further, in the core driving hydraulic unit 31 of this example, since required hydraulic equipment and electrical equipment are integrally assembled on the base plate 32, the core driving hydraulic unit 31 can be attached to and detached from the electric die casting machine 1. It is easy and does not impair the maintainability of the electric die casting machine 1. Further, since the core drive hydraulic unit 31 can be easily attached to and detached from the electric die casting machine 1, the core drive hydraulic unit 31 is moved and stored when the product is not cast using the core. Can be made easy.

  Hereinafter, a more detailed configuration and operation of the core unit 8 and the core driving hydraulic unit 31 will be described with reference to FIG. As is clear from these drawings, the core unit 8 of this example is provided with three cores 41a, 41b, 41c and one squeeze pin 42.

  As shown in FIG. 2, the core driving hydraulic unit 31 in this example drives a hydraulic pump 34 by a hydraulic pump driving motor 35, and sends hydraulic oil stored in an oil tank 33 into an accumulator 36. Accumulate pressure in the accumulator 36. The hydraulic oil accumulated in the accumulator 36 is sent to the rod side chambers of the hydraulic cylinders 43a, 43b, 43c for driving the core when the cores 41a, 41b, 41c are entered (at the time of forward movement). When the cores 41a, 41b, 41c are returned (retracted), they are sent to the head side chambers of the hydraulic cylinders 43a, 43b, 43c. Such a flow of the hydraulic oil is controlled by an ACC circuit 45 provided in the core driving hydraulic unit 31. The ACC circuit 45 includes a pressure sensor 46, a poppet valve 47, electromagnetic direction control valves 48 and 49 for controlling opening and closing of the poppet valve 47, an electromagnetic direction switching valve 50 provided in the discharge side hydraulic circuit a of the hydraulic pump 34, and It consists of a relief valve 51. An oil cooler 37 and an oil cleaner 39 are provided in the oil return path b that returns to the oil tank 33.

  Further, the core unit 8 of this example is provided with each hydraulic path c from the poppet valve 47 to each hydraulic cylinder 43a, 43b, 43c for driving the core, and each hydraulic path c includes a pressure reducing valve. 52a, 52b, 52c, throttle valves 53a, 53b, 53c, electromagnetic direction switching valves 54a, 54b, 54c for switching the hydraulic oil from the poppet valve 47 to the head side chamber or rod side chamber of the hydraulic cylinders 43a, 43b, 43c, Check valves 55a, 55b, and 55c are connected to electromagnetic direction control valves 56a, 56b, and 56c.

  On the other hand, the squeeze pin 42 is driven by a hydraulic cylinder 45, and a pressure reducing valve 56, a throttle valve 57, and a hydraulic path e from the poppet valve 47 to the hydraulic cylinder 45 for driving the squeeze pin are provided. An electromagnetic direction switching valve 58 for switching the hydraulic oil from the poppet valve 47 to the head side chamber or the rod side chamber of the hydraulic cylinder 45 and a check valve 59 are connected.

  Next, the operation of the electric die casting machine 1 according to the embodiment will be described with reference to FIG.

  As described above, in order to properly drive the hydraulic cylinders 43a, 43b, 43c for driving the core and the hydraulic cylinder 44 for driving the squeeze pin, the core 41a, 41b, 41c is driven and the squeeze pin 42 is driven. At the time of driving, the necessary pressure needs to be accumulated in the accumulator 36. Therefore, the pressure in the accumulator 36 is always detected by the pressure sensor 46, and when the pressure in the accumulator 36 is below a predetermined value, the solenoid CP1 of the electromagnetic direction switching valve 50 is turned on, and the hydraulic pump 34 The motor 35 is driven. As a result, the hydraulic oil in the oil tank 33 is supplied to the accumulator 36, and the pressure in the accumulator 36 is accumulated. In addition, when the pressure in the accumulator 36 reaches a predetermined pressure, the solenoid CP1 of the electromagnetic direction switching valve 50 is turned off and the motor 35 of the hydraulic pump 34 is stopped.

  Thus, in the state in which the pressure in the accumulator 36 is accumulated more than a predetermined pressure, the process of entering the cores 41a, 41b, 41c is started. In the entering process, the movable mold and the cores 41a, 41b, and 41c are driven forward. However, since the drive sources of the movable mold and the cores 41a, 41b, and 41c are different systems, the movable mold and the core 41a are driven separately. , 41b, 41c are not particularly limited in order of drive, and the movable mold and the cores 41a, 41b, 41c can be driven in parallel. First, the mold clamping of the movable mold will be described. In mold clamping of the movable mold, the movable die plate 7 is advanced by the mold opening / closing mechanism 23 by driving the electric servo motor 22 and is provided on the movable die plate 7. The movable mold is brought into contact with the fixed mold of the fixed die plate 5 and clamped.

  On the other hand, the process of inserting the cores 41a, 41b, 41c includes the solenoid CDR of the electromagnetic direction control valve 48 provided in the ACC circuit 45 and the solenoid 1CF of the electromagnetic direction switching valves 54a, 54b, 54c provided in the hydraulic path c. , 2CF, 3CF are turned on, and each hydraulic pressure is supplied from the accumulator 36 to the poppet valve 47, pressure reducing valves 52a, 52b, 52c, throttle valves 53a, 53b, 53c, and check valves 55a, 55b, 55c. Hydraulic fluid is sent to the rod side chambers of the cylinders 43a, 43b, 43c. As a result, the rods of the hydraulic cylinders 43a, 43b, 43c extend, and the cores 41a, 41b, 41c move forward.

  After that, the injection electric servo motor 14 is driven to perform the injection process by the injection unit 11 and the subsequent pressure holding / cooling process. In this pressure holding / cooling process, two squeeze pins 44 are used. The next pressurization process (local pressurization) is performed. The squeeze pin 44 is slidably disposed on the cores 41 a, 41 b, 41 c, and the secondary pressurizing step is performed by driving the squeeze pin 44 with hydraulic pressure from the hydraulic unit 31. In the secondary pressurizing step by the squeeze pin 44, the solenoid CP2 of the electromagnetic direction switching valve 50, the solenoid CDR of the electromagnetic direction control valve 49, and the solenoid LCU of the electromagnetic direction switching valve 58 are turned on to drive the hydraulic pump 34, and the hydraulic pressure is increased. The pressure oil discharged from the pump 34 is sent to the rod side chamber of the hydraulic cylinder 44 through the poppet valve 47, the pressure reducing valve 56, the throttle valve 57, the electromagnetic direction switching valve 58, and the check valve 59, and the rod of the hydraulic cylinder 44 is extended. At this time, the hydraulic oil stored in the head side chamber of the hydraulic cylinder 44 is returned to the oil tank 33 from the oil return path d via the check valve 59, the electromagnetic direction switching valve 58, the throttle valve 57, and the pressure reducing valve 56. As described above, when the hydraulic pump 34 is driven to extend the rod of the hydraulic cylinder 44, the molten metal filled in the cavity can be locally pressurized by the squeeze pin 42, so that sufficient hot water is added to the cavity. be able to.

  When the cooling process is completed, first, the hydraulic cylinder 44 is driven to return the squeeze pin 44 to the original position. In this case, the solenoid CD of the electromagnetic direction switching valve 58 is switched on to drive the hydraulic pump 34, the pressure oil discharged from the hydraulic pump 34 is sent to the head side chamber of the hydraulic cylinder 44, and the rod of the hydraulic cylinder 44 is moved. Shrink. At this time, the hydraulic oil supplied to the rod side chamber of the hydraulic cylinder 44 returns to the oil tank 33 from the oil return path d through the check valve 59, the electromagnetic direction switching valve 58, the throttle valve 57, and the pressure reducing valve 56.

  Next, the mold-clamping electric servomotor 22 is reversely rotated to retract the movable mold, open the mold, and return the cores 41a, 41b, 41c to their original positions. In the return process of the cores 41a, 41b, 41c, the solenoids 1CB, 2CB, 3CB of the electromagnetic direction switching valves 54a, 54b, 54c provided corresponding to the hydraulic cylinders 43a, 43b, 43c are turned on, and the accumulator 36 starts. The hydraulic fluid is sent to the head side chambers of the hydraulic cylinders 43a, 43b, and 43c via the poppet valve 47, the pressure reducing valves 52a, 52b, and 52c, the throttle valves 53a, 53b, and 53c, and the check valves 55a, 55b, and 55c. As a result, the rods of the hydraulic cylinders 43a, 43b, 43c contract, and the cores 41a, 41b, 41c move backward. At this time, the hydraulic oil stored in the rod side chambers of the hydraulic cylinders 43a, 43b, 43c passes through the check valves 55a, 55b, 55c, the throttle valves 53a, 53b, 53c, the pressure reducing valves 52a, 52b, 52c, and the oil return path d. Is returned to the oil tank 33. Thus, in this embodiment, since the return process of the cores 41a, 41b, and 41c is performed by the hydraulic cylinders 43a, 43b, and 43c, the cores 41a, 41b, and 41c can be easily taken out from the solidified metal material. And it can be done reliably.

  After opening the mold, an unillustrated ejection mechanism is driven to eject a solidified die-cast product from the movable mold, thereby completing one cycle of molding. During continuous operation, the same molding cycle is repeated for a predetermined number of cycles. The on / off timing of each solenoid described above is controlled by a signal from a control means (not shown) such as a system controller provided in the electric die casting machine 1.

  In the above embodiment, the case where the present invention is applied to an electric die casting machine provided with an accumulator 18 for driving the injection plunger 17 has been described as an example. However, the gist of the present invention is not limited to this. Of course, the present invention can also be applied to an electric die casting machine in which the injection plunger 17 is driven only by an electric servo motor.

  INDUSTRIAL APPLICABILITY The present invention can be used in an electric die casting machine that uses a core to cast a product having a predetermined shape.

DESCRIPTION OF SYMBOLS 1 Electric type die-casting machine 2 Main base board 3 Support member 4 Tail stock 5 Fixed die plate 6 Tie bar 7 Movable die plate 8 Core unit 9 Mold clamping electric servo motor 10 Toggle mechanism 11 Injection unit 12 Base member 13 Holding block 14 Injection Electric Servo Motor 15 Moving Body 16 Injection Sleeve 17 Injection Plunger 18 Accumulator 21 Mold Clamping Unit 31 Core Drive Hydraulic Unit 32 Base Plate (Oil Pan)
33 Oil tank 34 Hydraulic pump 35 Hydraulic pump drive motor 36 Accumulator 37 Oil cooler 38 Valves 39 Oil cleaner 40 Electric box

Claims (3)

A main base board, a mold clamping mechanism that is mounted on the main base board and opens and closes a mold using a mold clamping electric servo motor as a drive source, and an injection electric servo motor that is mounted on the main base board. An injection mechanism for injecting molten metal into the mold as a drive source, a core driving hydraulic cylinder attached to the mold, and a core driving hydraulic unit for supplying pressure oil to the hydraulic cylinder In the electric die casting machine
The core drive hydraulic unit is configured by integrally assembling a plurality of devices including at least an oil tank, a hydraulic pump, a hydraulic pump drive motor, an oil cooler, valves, and an electric box on the base plate, The electric die casting is characterized in that each of the plurality of devices is disposed around the electric servomotor for mold clamping by fixing the mold on the main base panel outside the set position of the mold clamping mechanism. Machine.   2. The electric die casting machine according to claim 1, wherein each of the devices constituting the core driving hydraulic unit is distributed and arranged in a side portion and a lower portion of the mold clamping electric servo motor.   2. The electric die casting machine according to claim 1, wherein the base plate also serves as an oil pan that receives hydraulic oil leaked from the core driving hydraulic unit and prevents the oil from flowing out to the outside. 3.

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