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WO2008035805A1 - Dispositif d'injection pour une machine à couler sous pression - Google Patents

Dispositif d'injection pour une machine à couler sous pression Download PDF

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Publication number
WO2008035805A1
WO2008035805A1 PCT/JP2007/068734 JP2007068734W WO2008035805A1 WO 2008035805 A1 WO2008035805 A1 WO 2008035805A1 JP 2007068734 W JP2007068734 W JP 2007068734W WO 2008035805 A1 WO2008035805 A1 WO 2008035805A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection
piston
hydraulic
pressure
chamber
Prior art date
Application number
PCT/JP2007/068734
Other languages
English (en)
Japanese (ja)
Inventor
Masashi Uchida
Kazuki Hiraizumi
Original Assignee
Ube Machinery Corporation, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2006254002A external-priority patent/JP5109314B2/ja
Priority claimed from JP2007143347A external-priority patent/JP2008155280A/ja
Application filed by Ube Machinery Corporation, Ltd. filed Critical Ube Machinery Corporation, Ltd.
Priority to CNA2007800346968A priority Critical patent/CN101516546A/zh
Priority to US12/441,406 priority patent/US20090242161A1/en
Publication of WO2008035805A1 publication Critical patent/WO2008035805A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
    • B22D17/10—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled with horizontal press motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/2023—Nozzles or shot sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/32—Controlling equipment

Definitions

  • the present invention relates to a Japanese patent application dated 20 September 2006, 20 00 06 — 2 5 4 0 0 2, 2 0 0 6 years 1 January 30, Japanese patent application dated 2 0 0 6 — 3 2 4 0 0 0, 2 0 0 May 3 0 Claimed on the basis of the priority of 2 0 0 7-1 4 3 3 4 7 , Incorporated herein by reference and continued in this application.
  • Technical field
  • the present invention relates to an injection apparatus such as a die casting machine, and more particularly to a hybrid type injection apparatus.
  • the speed of the injection piston driven using a hydraulic cylinder is important.
  • the flow rate of hydraulic fluid supplied to the hydraulic cylinder is controlled by adjusting the hydraulic control valve, so the response is low and it is difficult to maintain a stable injection piston speed.
  • the speed of an injection piston driven using a hydraulic cylinder it is difficult to detect the load applied to the injection piston and it is difficult to perform feedback control. Difficult to maintain injection piston speed.
  • an injection device in which an injection piston (plunger) is connected in series with a pole screw mechanism that is driven by an electric servomotor and a hydraulic cylinder that is operated by the hydraulic pressure of the hydraulic pump and accumulator.
  • This type of injection device for a die machine that combines hydraulic and electric drive is called a hybrid type (formula).
  • the hybrid type injection device makes it possible to electrically control the injection piston speed and the like in an injection process that requires stable and precise control.
  • a hybrid injection device has been conceived as an injection device for a die casting machine.
  • this type is a type in which injection boosting and pressurization holding after boosting are carried out electrically, the maximum torque is maintained during pressurization holding. Therefore, there is a problem that a large current is required to flow in order to generate a large power loss and a problem that the size of the camera increases.
  • the above problems occur at the time of pressurization and pressurization, and the details are described below.
  • Figure 3 shows changes in injection speed (V) and cylinder head pressure (P H ) of the injection piston (plunger) with respect to injection time (or injection stroke) in the operation (injection) process of the die casting machine (injection characteristics diagram and Call).
  • Figure 3 shows how much injection piston drive power is required in the injection process.
  • the pressurization time ⁇ t shown in the injection characteristic diagram of Fig. 3 is required to have a performance of 10 msec or less.
  • the injection piston is generally moved forward by several mm to compress the hydraulic fluid in the hydraulic cylinder.
  • a flow rate of about 500 L / in is required for a 500 t machine).
  • the large-diameter booth evening (piston) rod In the case of an electric booth that performs the injection process electrically, the large-diameter booth evening (piston) rod must be advanced at a high speed, and at this time, the maximum rotation speed and torque are required.
  • the pressure for the pressurization holding time TH about 5 to 10 sec
  • This high torque is required, and a large current flows. Therefore, there is a possibility that problems such as power loss and motor trip occur.
  • an electric servo motor is used to increase the controllability of the injection speed during high-speed injection
  • a hydraulic cylinder is used to obtain a sufficiently large pressure increase / holding force during pressure increase / hold pressure.
  • the thrust of the hydraulic cylinder is transmitted to the injection plunger through the pole screw shaft, so that the shaft diameter of the pole screw needs to be increased to some extent from the viewpoint of securing mechanical strength.
  • this increase in diameter prevents the injection plunger speed from being increased and stabilized.
  • the electric support motor it is necessary to supply the hydraulic oil to the hydraulic cylinder following the advance, but the hydraulic circuit for following the hydraulic oil supply is complicated. At the same time, control itself becomes difficult.
  • a large motor for a die casting machine of 3500 tons for example, a large motor of 50 OK w is required for instantaneous output, and a large pitch is required to increase the speed of the injection plunger.
  • Screw feed mechanism for example, to obtain a high speed of 5 m / s at 200 rpm, a screw with a pitch of 150 mm is required, and a screw with a pitch of 90 mm is required even at 3 m / s ) Is required.
  • the drive device that drives the injection plunger using a large and large output motor has to be large-scale and large-capacity, its controllability is reduced, and a large-scale and large-capacity drive device is reduced. If it is used, the inertial mass of the forged product will increase, and burrs will easily occur in the forged product, making it difficult to maintain the quality of the forged product.
  • Patent Document 5 the applicant of the present invention disclosed in Patent Document 5 that the hydraulic control mechanism connected with the plunger is provided with an advance / retreat control mechanism that drives the hydraulic control mechanism in the advance / retreat direction of the plunger.
  • an advance / retreat control mechanism that drives the hydraulic control mechanism in the advance / retreat direction of the plunger.
  • the injection device itself can be reduced in size and weight as compared with the conventional device, and at the same time, switching and pressure increase at the low-speed and high-speed switching positions can be achieved. Because it can be controlled with high precision, it can produce high quality forged products with good yield, but there are limits to miniaturization and weight reduction.
  • FIG. 1 although not shown, a logic valve is actually provided at the outlet of the accumulator (A C C). The reason for this will be described below.
  • a C C the pressure oil supply time to the ACC by the pump is, for example, 8 sec is required for the mold clamping machine.
  • Fig. 9 the schematic steps before the start of injection are shown, and the required time for each process is shown in parentheses.
  • the product removal procedure (S 1) the product molded in the previous process is removed.
  • the spraying procedure (S2) spray the release agent on the inner surface of the mold.
  • the core insertion procedure (S 3) move the mold according to the product shape as necessary.
  • the mold clamping procedure (S4) the fixed and movable molds are engaged.
  • the hot water supply procedure (P 5) supply the molten metal to the sleeve.
  • the injection procedure (S 6) the molten metal is injected into the mold cavity and molded.
  • the time required for each procedure is 8 sec (SI), 9 sec (S 2), 2 sec (S 3), 5 sec (S 4), and 3 sec (S 5).
  • This pressure fluctuation causes a rise in speed and a fluctuation (decrease) in the maximum value in the injection accumulator (ACC), and a fluctuation in the pressure rise time and fluctuation in the pressure rise in the pressure accumulation accumulator (ACC). It directly affects the quality variation of die cast products.
  • a logic valve the least leaking valve, is installed at the outlet of the ACC, which is the injection logic valve 7 1 and boosting logic valve 7 3 in the conventional circuit shown in Fig. 10.
  • an injection logic opening / closing valve 70 and a boosting logic opening / closing valve 72 are required.
  • Patent Documents 4 and 5 are injection devices.
  • the size of the device is large, and maintenance and work environment are insufficient. There is a limit to downsizing and weight reduction. There was room for improvement.
  • Another conventional plan is a standard hydraulic circuit.
  • the cartridge valves 2 2 and 2 8 which are logic valves are provided. It is a deletion target of the present invention.
  • the conventional example in FIG. 10 is a hydraulic circuit based on the conventional proposal of Patent Document 6, which is not a hybrid type but a hydraulic type conventional injection device, and a low pressure accumulator (piston accumulator for injection 30). ) And a high-pressure accumulator (pressure-up piston accumulator 3 2).
  • an injection logic valve 7 1, an injection logic open / close valve 70, a boost logic valve 7 3, and a boost logic open / close valve 7 2 are provided. As described above, these logic valves function to prevent leakage of hydraulic pressure from the piston accumulators 3 1 and 3 3. Since the description of the conventional hydraulic circuit shown in FIG. 10 overlaps with the detailed description in the embodiment of the present invention, the description of the unnecessary part is omitted and the description is simplified. Further, in the conventional example of FIG. 10, the implementation of the present invention shown in FIG. 7 and FIGS. Elements of FIG. 10 that are the same as or similar to elements of the form are designated by the same reference numerals.
  • reference numbers 3 2 and 3 4 are an injection gas bottle and a pressurization gas bottle, respectively.
  • Reference numbers 7 7, 7 8, 7 9 are check valves.
  • Reference numerals 1 8 and 1 9 are electromagnetic switching valves and are provided in the pump supply line 3 6.
  • Reference numeral 75 is an electromagnetic three-way switching valve, which is provided upstream of the valve M 24.
  • Reference number 76 is an electromagnetic three-way switching valve, which is provided on the line that communicates with the injection cylinder rod chamber.
  • Patent Document 1 Japanese Patent Laid-Open No. 2 0 0 0-0 3 3 4 7 2
  • Patent Document 2 Japanese Patent Laid-Open No. 2 0 0 0 1 0 8 4 6 5 4
  • Patent Document 3 Japanese Patent Laid-Open No. 2 0 0 1 1 0 0 1 1 2 6
  • Patent Document 4 Japanese Patent Laid-Open No. 2 0 0 6 1 0 0 0 8 8 7
  • Patent Document 5 Japanese Patent Application No. 2 0 0 6 1 1 1 5 8 5 9
  • Patent Document 6 Japanese Patent Application Laid-Open No. 8-1 1 7 9 6 2 Disclosure of Invention
  • An object of the present invention is to provide a die-cast machine injection device, in particular a hybrid injection device, which can prevent a large power loss and reduce the size of the machine.
  • Another object of the present invention is that, in a hybrid injection device of a die cast machine, the logic valve at the outlet of the accumulator is deleted, and the flow resistance is greatly reduced, thereby improving the injection speed. Providing a hybrid injection device that can achieve injection performance Is Rukoto. Furthermore, the cost of the injection device is reduced.
  • An object of the present invention is to provide a high-speed injection device that drives a plunger with a simple drive mechanism and is small, light, excellent in controllability, and excellent in maintainability.
  • An injection device (10) for a die casting machine is an injection piston (1) for injecting a molten metal such as aluminum into a die of a die casting machine in order to achieve the above-described object. 5) and an injection cylinder (16) for accommodating a hydraulic cylinder type electric booth (8).
  • the head chamber (8H) of the electric booster (8) is in fluid communication with the head chamber (16H) of the injection cylinder (16), so that the electric booster (8)
  • the piston rod (5) accommodated in the booth is moved linearly to supply pressure oil to the head chamber (16 H) of the injection cylinder (16) to bring the injection piston (15) Injection molding is performed by pressing and moving.
  • the electric booth (8) has a structure in which the pressure is increased with the head area of the electric booster (8) when the pressure is increased, and the pressure is increased with the load area when the pressure is maintained.
  • connecting pipes 41, 43, 44, 45
  • head chamber (16H) of the injection cylinder and the rod chamber (8R) of the booster (8). It is provided, and the flow of hydraulic oil is interrupted in the connecting pipe A stop valve (25) is provided.
  • the electric booster (8) is preferably driven by an electric motor (1), and the electric motor (1) is more preferably a support motor, and the injection device (10) is an injection cylinder Piston accumulator for injection (3 1) for supplying pressure oil to the head chamber (16 H), and piping for fluid communication from the boot chamber (8 R) to the tank (3 5) (4 3) and a stop valve (2 6), and the rod chamber (1 6 R) of the injection cylinder (16) is supplied with pressure from the tank (3 5) and the pump. It is preferable to make fluid communication with the oil supply port (36).
  • the injection device (10) is an injection cylinder Piston accumulator for injection (3 1) for supplying pressure oil to the head chamber (16 H), and piping for fluid communication from the boot chamber (8 R) to the tank (3 5) (4 3) and a stop valve (2 6), and the rod chamber (1 6 R) of the injection cylinder (16) is supplied with pressure from the tank (3 5) and the pump. It is preferable to make fluid communication with the oil supply port (36).
  • the injection device further includes a pressure detection sensor (37) for detecting the head pressure, which is the pressure in the head chamber (16 H) of the injection cylinder (16), in the electric booth (8). In this way, the head pressure is detected, the torque of the electric motor (1) is controlled, and the switching control from the boosting operation to the pressurization holding operation is performed.
  • a pressure detection sensor (37) for detecting the head pressure, which is the pressure in the head chamber (16 H) of the injection cylinder (16), in the electric booth (8).
  • An injection device (1 0 0) for a die casting machine includes an injection cylinder (1 6) that houses an injection piston (1 5) for injecting a molten metal such as aluminum into a die of the die casting machine. ) And pressure oil is supplied to the head chamber (16 H) of the injection cylinder (16) and the injection piston (15) is pressed and moved to perform a booth for performing injection molding.
  • a hydraulic cylinder type electric booster (8) that houses the piston rod (5) in the evening and a head of the injection cylinder (16) that can store a predetermined amount of hydraulic oil at a predetermined maximum pressure.
  • a piston accumulator (3 1) formed so as to be able to press and move the injection piston (15) by supplying pressurized oil to the chamber (16 H), and comprising an electric booster (8 )
  • pressure oil is supplied to the piston accumulator (3 1) just before the start of injection to prevent leakage of the pressure oil from the first switching valve (2 4). Therefore, it is possible to delete a logic valve that should be provided at the outlet of the piston accumulator (3 1). Specifically, the hot water supply process was performed immediately before the start of injection, and the supply of pressure oil to the piston accumulator (31) was completed during the hot water supply process.
  • the head chamber (8H) of the electric booster (8) is in fluid communication with the head chamber (16H) of the ejection cylinder (16) and the piston accumulator (31).
  • the second switching valve (25) is provided in the flow path that fluidly connects the electric bush head chamber (8H) and the injection cylinder head chamber (16H).
  • the second switching valve (25) is provided on one side of the flow path connection side with a flow path communicating with the electric booth evening head chamber (8H) and a tank for storing hydraulic oil. (35) fluidly connected to the flow path communicating with the flow path, and on the other flow path connection side, the flow path communicating with the head chamber (16 H) of the injection cylinder (16) and the piston accumulator (3 1) Fluid connection to the flow path communicating with.
  • Pressure oil is supplied to the piston accumulator (3 1) by an electric booth (8), and the pressure oil in the head chamber (8H) of the electric booster (8) is pressed and supplied. Furthermore, after the injection operation is completed, in order to return the injection piston (15) to the head side end of the injection cylinder (16), the electric booth (8) is driven to apply pressure oil. It is preferable to supply to the rod chamber (16 R) of the ejection cylinder (16). Yes.
  • the injection device includes a third switching valve (6) provided in a flow path for fluid communication between the electric booth evening chamber chamber (8R) and the injection cylinder head chamber (16H). 2) is further provided.
  • the first switching valve (2 4) is connected to the flow path communicating with the piston accumulator (3 1) and the tank (3 5) storing hydraulic oil on one flow path connection side.
  • the fluid passage is connected to the fluid passage, and on the other fluid passage connection side, the fluid passage connected to the head chamber (16H) of the injection cylinder (16) and the rod chamber of the ejection cylinder (16) (3 6 R) is fluidly connected to the flow path communicating with the flow path, and the third switching valve (6 2) is connected to the flow path communicating with the tank (3 5) on one flow path connection side.
  • the present inventor has intensively studied a compact and lightweight high-speed injection structure (hybrid high-speed injection mechanism) that can produce a complex-shaped forged product with a high quality and a high yield by using both an electric mechanism and a hydraulic mechanism. .
  • the present inventor provided a piston rod that is advanced and retracted by an electric mechanism in the hydraulic cylinder behind the piston rod to which the plunger is connected, and the two piston rods are driven individually or integrally as appropriate. For example, we have found that it is possible to accurately control the forward / backward movement of the plunger at high speed, and to manufacture a complex shaped product with high quality and high yield.
  • the present invention has been made on the basis of the above findings, and the gist thereof is as follows.
  • a piston rod controlled by the advance / retreat control mechanism is installed behind the hydraulic cylinder containing the plunger rod controlled by the hydraulic control mechanism, and the hydraulic control mechanism and the advance / retreat control mechanism are driven in cooperation.
  • the present invention in a hydraulic circuit of a hybrid type injection device of a die machine that performs injection boosting and pressurization holding after boosting electrically.
  • the booster piston rod drive is driven.
  • the required maximum torque it is possible to avoid the need for a large current to flow during pressurization and to prevent a large power loss and to reduce the motor size.
  • the size of the injection device itself can be reduced, and the manufacturing cost of the injection device can be reduced.
  • the head pressure is detected. Since the torque of the electric motor (1) can be controlled so that the head pressure becomes a predetermined value, stable and accurate injection molding becomes possible. Furthermore, by performing switching control from the pressure increasing operation to the pressure holding operation based on the head pressure, it is possible to prevent inappropriate operation such as an excessive increase in injection pressure.
  • the logic valve at the outlet of the accumulator (ACC) provided to prevent the leakage of pressure oil from the piston accumulator can be eliminated, the pipe resistance can be greatly reduced, and the required injection Achievement of performance becomes easy and cost reduction can be implemented.
  • the injection device itself can be further reduced in size and weight as compared with the conventional device, and at the same time, switching and pressure increase at a low speed / high speed switching position can be controlled with high responsiveness and high accuracy. Therefore, according to the present invention, a high-quality forged product can be manufactured with a high yield. In addition, the present invention is remarkably excellent in maintainability as it is further reduced in size and weight.
  • FIG. 1 is an explanatory diagram showing a schematic configuration of a hydraulic circuit according to an embodiment of an injection device for a die casting machine according to the present invention.
  • Fig. 2a is an explanatory diagram showing the state of the hydraulic circuit in various work processes in the die casting machine, showing the circuit during low-speed injection.
  • Fig. 2b is an explanatory diagram showing the state of the hydraulic circuit in various work processes in the die casting machine, showing the circuit during high-speed injection.
  • Fig. 2 ci is an explanatory diagram showing the state of the hydraulic circuit in various work processes in the die casting machine, and shows the circuit during boosting.
  • FIG. 2d is an explanatory diagram showing the state of the hydraulic circuit in various work processes in the die casting machine, and shows the circuit during pressure holding.
  • Fig. 2e is an explanatory diagram showing the state of the hydraulic circuit in various work processes in the die casting machine, and shows the circuit during ejection.
  • Fig. 2f is an explanatory diagram showing the state of the hydraulic circuit in various work processes in the die-casting machine, and shows the circuit during reverse operation.
  • Fig. 3 is a graph (injection characteristics diagram) showing the change in injection speed and cylinder head pressure of the injection piston with respect to the injection time (or injection stroke) in the operation process of the die casting machine.
  • Fig. 4 is a graph in which each process (region) during pressurization and pressurization holding is clearly written on the graph of Fig. 3.
  • Fig. 5 is an explanatory diagram of the difference between the hydraulic circuit in the boosting step (booster circuit during boosting) in Fig. 2c and the hydraulic circuit (pressurizing and holding circuit) in the pressurizing and holding step in Fig. 2d.
  • the booster circuit is shown.
  • FIG. 6 shows the hydraulic circuit in the boosting process of Fig. 2c (booster circuit during boosting)
  • FIG. 2d is an explanatory diagram of the difference between the hydraulic circuit (pressure holding circuit) in the pressure holding process of FIG. 2d and shows the booster circuit at the time of pressure holding.
  • FIG. 7 is an explanatory diagram showing a schematic configuration of a hydraulic circuit of the second embodiment of the die casting machine injection device according to the present invention.
  • FIG. 8a is an explanatory view showing the state of the hydraulic circuit of FIG. 7 in various work processes in the die casting machine, and shows the circuit when charging (charging) the accumulator.
  • FIG. 8b is an explanatory diagram showing the state of the hydraulic circuit of Fig. 7 in various work processes in the die-casting machine
  • Fig. 8c shows the circuit during low-speed injection in Fig. 7 in various work processes in the die-casting machine.
  • FIG. 8 d is a diagram illustrating the state of the hydraulic circuit
  • FIG. 8 d is a diagram illustrating the circuit during high-speed injection.
  • FIG. 8 d is a diagram illustrating the state of the hydraulic circuit of FIG. 7 in various work processes in the die casting machine.
  • Fig. 8e is an explanatory diagram showing the state of the hydraulic circuit of Fig. 7 in various work processes in the die-casting machine.
  • Fig. 8f shows the circuit during pressurization holding.
  • Fig. 8b is an explanatory diagram showing the state of the hydraulic circuit of Fig. 7 in various work processes in the die-casting machine
  • Fig. 8c shows the circuit during low-speed injection in Fig. 7 in various work processes
  • FIG. 8f is a diagram of various work processes in the die-cast machine.
  • FIG. 8g is a diagram illustrating the state of the hydraulic circuit of FIG. 7, and
  • FIG. 8g is a diagram illustrating the state of the hydraulic circuit of FIG. 7 in various work processes in the die casting machine.
  • Fig. 9 is an explanatory diagram showing the flow of the process before the start of injection in general injection molding. The time required for each process is shown at the same time.
  • Figure 10 shows the conventional hydraulic die casting machine. Hydraulics for injection equipment It is explanatory drawing which shows schematic structure of a circuit.
  • Figure 11 shows a table comparing the accumulator charge time and the shortest hot water supply time for an actual actual machine (clamping force from 3 75 t to 40 00 t machine).
  • FIG. 12 is a diagram showing one structure of the hybrid high-speed injection device of the present invention.
  • FIG. 13 is a diagram showing a mode immediately before the start of injection in the invention.
  • FIG. 14 is a diagram showing a state immediately before the plunger reaches the low speed-high speed switching position S in the present invention.
  • FIG. 15 is a view showing a state in which the plunger rod advances at a high speed in the present invention.
  • FIG. 16 is a view showing an aspect when the filling of the molten metal is completed and the forward movement of the plunger rod is almost stopped in the present invention.
  • FIG. 17 is a diagram showing an aspect when injection is completed and the forward movement of the plunger rod is completely stopped in the present invention.
  • FIG. 18 is a view showing a state in which the piston rod and the plunger rod are integrated and advanced in order to discharge the solidified substance remaining in the injection sleeve in the present invention.
  • FIG. 19 is a view showing a mode in which the plunger rod and the piston rod are retracted in preparation for the next injection in the present invention.
  • FIG. 20 is a diagram showing the rise of the injection pressure in the present invention.
  • FIG. 21 is a diagram showing another structure of the hybrid high-speed injection device of the present invention.
  • FIG. 22 is a diagram showing a mode immediately before the start of injection in the present invention.
  • FIG. 23 is a diagram showing another mode immediately before the plunger reaches the low speed / high speed switching position S in the present invention.
  • Fig. 24 shows that the plunger rod moves forward at high speed in the present invention. It is a figure which shows another aspect.
  • FIG. 25 is a diagram showing another aspect when the molten metal filling is completed and the forward movement of the plunger rod is almost stopped in the present invention.
  • FIG. 26 is a view showing another aspect of the present invention when the injection is completed and the forward movement of the plunger rod is completely stopped.
  • FIG. 27 is a view showing another embodiment in which the piston rod and the plunger rod are integrated and advanced in order to discharge the coagulum remaining in the injection sleeve in the present invention.
  • FIG. 28 is a view showing another mode in which the plunger rod and the piston port are moved backward in preparation for the next injection in the present invention.
  • FIG. 29 is a diagram showing another increase in the injection pressure according to the present invention. DESCRIPTION OF PREFERRED EMBODIMENTS FOR CARRYING OUT THE INVENTION
  • FIG. 1 and 2a to 2f show a first embodiment of an injection device for a die casting machine according to the present invention
  • FIG. 1 shows a hydraulic pressure of the first embodiment of the injection device for a die casting machine
  • FIG. 2a to FIG. 2f are explanatory diagrams showing states of the hydraulic circuit in various work processes in the die casting machine of FIG.
  • the injection device 10 is a hybrid type, and the injection piston (plunger) 15 is actuated by driving the booth evening piston rod 5 by the thermopo 1 and the mold is made of aluminum (AL ) Inject molten metal.
  • the thermoplum 1 is provided as an electric drive unit. It is connected to the drive gear 2 and driven to rotate.
  • the drive gear 2 meshes with the pole nut gear 3 whose outer side is a gear and whose inner side is threaded, and the pole nut ⁇ gear 3 is a pole screw shaft whose outer surface is threaded.
  • the pole screw shaft 4 passes through the opening passing through the center of the pole nut gear 3.
  • the upper end portion of the ball screw shaft 4 is connected to one end portion of the top plate 7, and the other end portion of the top plate 7 is connected to the upper end portion of the booth piston rod 5.
  • Booster piston piston 5 is provided at the lower end of booster piston rod 5, and booster piston piston 5 reciprocates in cylinder-shaped bush evening 8 by the vertical movement of booster piston rod 5.
  • Booth evening (cylinder) The hydraulic fluid in 8 is pumped and sucked.
  • the front end of the booth evening head chamber 8 H side of the booster 8 is in fluid communication with the injection cylinder head chamber 16 H of the injection cylinder 16.
  • the injection cylinder 16 is installed horizontally, while the booth evening 8 is installed vertically so as to be orthogonal thereto. Is called vertical type.
  • the injection device 10 according to the present embodiment is described in a vertical configuration. However, the injection device according to the present invention is connected to the injection cylinder 16 in parallel with the booster 8 installed horizontally. Yes, it may be horizontal.
  • An injection piston 15 is accommodated in the injection cylinder 16, and a plunger tip (not shown) is attached to the left end of the injection piston 15. Housed in a plunger sleeve (not shown) that penetrates into the stationary mold of the machine, the plunger sleeve is in fluid communication with the mold.
  • the injection apparatus 10 includes an injection piston accumulator (A CC) 3 1 and gas bottle 3 2 for driving it under pressure, valve A 2 1, valve B 2 2, nozzle C 2 3, valve M 2 4, and for storing hydraulic oil 3 and 5 tanks.
  • a CC injection piston accumulator
  • the injection device 10 has its hydraulic circuit in its hydraulic circuit, as shown in FIG. 1, the head chamber 16 H of the injection cylinder 16 and the rod chamber 8 R of the cylinder-like booster 8 and the tank 3. Pressure detection provided on the end face of the booster 8 on the head chamber side of the valve D 2 5 and valve E 2 6 provided on the piping lines 4 5, 4 4 and 4 3 Sensor 3 7.
  • Figure 2a shows the state of the hydraulic circuit during low speed injection.
  • booster piston head 5 is driven downward (forward) by servo motor 1, and the hydraulic oil in booth evening head 8H is pushed at low speed, and injection cylinder chamber 1 6 H
  • the injection piston 15 in the injection cylinder 16 is pushed to the left (toward the plunger sleeve in which the molten AL is stored).
  • the booth evening piston rod 5 of the present embodiment has a small diameter, so that an opening chamber 8 R of the booster 8 is formed, and the booster rod chamber 8 R is as shown in FIG.
  • the piping lines 4 4 and 4 3 are connected to the tank 3 5 through the valve E 2 6 for fluid communication. Therefore, when the booster piston rod 5 is lowered, the valve E 26 is opened, so that the hydraulic oil is supplied from the tank 35 to the booster rod chamber 8 R via the lines 4 3 and 4 4 and the valve E 2 6. Flows in. At this time, the tank 35 may be installed at a position higher than the booth evening load chamber 8 R, and the hydraulic oil may flow into the booster rod chamber 8 R due to gravity, but the hydraulic oil may be blocked by another means such as a pump. —It may be supplied to the 8 R room. A plunger tip (not shown) is attached to the left end of the injection piston 15 and The nanger chip is housed in a plunger sleeve (not shown) that penetrates into the die of the die casting machine.
  • FIG. 2b shows the hydraulic circuit during high speed injection.
  • the valve accumulator for injection ( ACC) 3 1 Pressure oil is introduced into the head chamber 16H of the injection cylinder 16 via the piping line 41, and a large flow rate of hydraulic fluid is introduced from the two power sources.
  • valve E 2 6 is open and valve D 2 5 is closed and valve B 2 2 is open and valve C 2 3 is still closed, and valve A 2 1 is also closed.
  • the opening degree of the valve M 24 the high-speed injection is completed while controlling the high-speed speed (the booster piston rod 5 keeps moving forward during this time). This high-speed injection corresponds to time 1; 1 to t 2 in Figs.
  • Figure 2c shows the hydraulic circuit during boosting.
  • the valve M 24 is closed from the state of Fig. 2b, and the piston accumulator for injection Murray evening (ACC) 3
  • ACC injection Murray evening
  • the booth evening piston rod 5 is further advanced (lowered) to increase the pressure in the injection cylinder head chamber 16 H.
  • valve E 2 6 is open, valve D 2 5 is closed, and valve B 2 2 is open, valve C 2 3 is still closed, and valve A 2 1 is also closed.
  • This pressure increase corresponds to the time from t2 to t3 in Figs. 3 and 4, and the molten AL in the mold cavity is boosted.
  • the pressure applied by the booster 8 is measured by the pressure detection sensor 37, and when the pressure reaches the target 80 to 90%, the hydraulic circuit for maintaining the pressure shown in Fig. 2d is switched.
  • valve E 26 is closed and valve D 25 is switched to open.
  • the pressure of the hydraulic oil pushed by the booth piston 6 is transmitted to the rod chamber 8 R of the booster 8, so that the force that should be exerted by the supporter 1 is The force that is the product of the area corresponding to the diameter of and the pressure, can exert the same force as the force for pressing the injection piston 15 of the conventional example.
  • the valve B 2 2 is opened and the valve C 2 3 is kept closed, and the valve A 2 1 and the valve M 2 4 are also closed.
  • This pressure holding time corresponds to the time t 3 to t 4 in FIGS.
  • the ejecting process shown in Fig. 2e is carried out.
  • the servo motor 1 moves the booth evening piston rod 5 forward (lowers) to move the injection piston 15 to the left.
  • the mold is opened and the die-cast product can be taken out.
  • the injection return process of FIG. 2 f is performed, and hydraulic oil is supplied from the pump supply port 36 to the injection cylinder rod chamber 16 R via the line 42, and the injection piston 15 is Move to the head side (right direction) in the injection cylinder 16
  • Booster Piston Rod 5 is driven up by the Serpomo.
  • the hydraulic oil in the injection cylinder head chamber 16 H and the booster chamber 8 R is returned to the tank 35 by opening the valve A 21 and valve E 26 together.
  • valve E 2 6 In the ejecting process shown in Fig. 2e, valve E 2 6 is open and valve D 2 5 is closed, and valve B 2 2 is open and valve C 2 3 is closed, and valves A 2 1 and Valve M 2 4 is also closed.
  • valve E 2 6 In the injection return process shown in Fig. 2f, valve E 2 6 is open, valve D 2 5 is closed and valve B 2 2 is closed, valve C 2 3 is set to open, valve A 2 1 is open, and valve A 2 1 is open. M 2 4 is closed.
  • T 2 CXA BR XPH
  • the head area A BR is set to 1 to 3 of the head area A BH , the required torque decreases at the same rate, and the motor current value that is proportional to the torque also decreases at the same rate.
  • Solve problems such as Moyu trip Is done. In this case note that while maintaining the torque T 1, switching the circuits, the problem of the pressure P H is applied pressure by a height no longer injection cylinder ratio of rod de area and heads area is increased over one appear
  • the piston hardly moves, and it should be noted that the oil amount of 10 to 20 L / min should be sent, and the necessary torque T generated by the motor is the area of the booth evening pressurization A B Is proportional to the product of the head pressure P H and the area A B is changed to reduce the required torque T and lower the current value (P H is constant to maintain the injection piston pressure). is there.
  • FIGS. 7 and 8a to 8g show a die casting machine injection device 100 according to the second embodiment of the present invention
  • FIG. 7 shows a second embodiment of the die casting machine injection device
  • FIG. 8A to FIG. 8G are explanatory diagrams showing states of the hydraulic circuit in various work processes in the die casting machine.
  • Elements in FIGS. 7 and 8a to 8g that are the same as or similar to the elements in the first embodiment shown in FIGS. 1 and 2a to 2f are designated by the same reference numerals. Has been.
  • the injection piston accumulator 3 1 No leakage of pressure oil from the valve (ie leakage from the valve M 2 4) is described, nor is the timing of filling the piston accumulator 31 for injection described.
  • the configuration around the electric booth 8 and the configuration around the injection cylinder 16 are the same as those in the first embodiment, and a description thereof will be omitted.
  • the hydraulic circuit of the second embodiment is a system in which the piston accumulator 31 for injection is charged (charged) by the booth evening 8, and is different from the hydraulic circuit of the first embodiment. Compared with the conventional hydraulic circuit in Fig. 10 of the hydraulic system, the comparison is clear.
  • the valve M 2 4 which is a motor valve that can be opened and closed at high speed, is installed on the outlet side of the piston accumulator for injection 3 1 (first However, pulp A 2 1 is provided in a line that branches off from the line between the piston accumulator 3 1 for injection and the valve M 2 4 (unlike the first embodiment).
  • the line connecting booth evening 8 at booth evening 8 H and evening cylinder 16 at injection cylinder 16 6 is equipped with valve D (switching valve) 25,
  • the line connecting the rod chamber 8 R and the valve M 24 is preferably provided with a motor valve 62 that can be opened and closed at a high speed, as shown in FIG.
  • FIG. 8a shows a filling (charging) process of the injection accumulator 31 for injection which is not explained in the first embodiment. Form of this implementation In this state, this filling step is performed immediately before the injection step. That is
  • the hot water supply process in FIG. 9 is performed.
  • the injection piston 15 has returned to the vicinity of the end of the injection cylinder head chamber side.
  • the booster piston rod 5 is driven downward (advanced) by the servo motor evening 1 and pushes the hydraulic oil in the booth evening chamber 8 H at a low speed.
  • the valve D 2 5 Therefore, the hydraulic oil passes through valve D 2 5 and check valve 6 4 and is filled in the piston accumulator 3 1 for injection.
  • the line branching to the tank 3 5 of the line 6 1 is provided with a check valve 6 5 to block the flow of hydraulic oil to the tank 3 5.
  • the filling is completed by providing a pressure sensor (not shown) on the line connecting the injection accumulator 3 1 and the valve A 2 1, measuring the pressure in this line, and reaching the predetermined pressure. It may be detected and completion of filling.
  • a sensor (not shown) that detects the position of the piston is installed in the piston accumulator for injection 3 1, thereby detecting that the piston has reached a predetermined position and filling it. May be completed.
  • the supply of hydraulic oil to the booster rod chamber 8R is performed by gravity from the tank 35 through the motor valve 62, but is described separately in the first embodiment. It may be implemented by a pump as well.
  • FIG. 8b shows the state of the hydraulic circuit during low-speed injection (process) corresponding to Fig. 2a of the first embodiment.
  • the valve D 25 is switched so that the booster head chamber 8 H and the injection cylinder head chamber 16 H are in contact with each other, and the booth evening piston rod 5 is further lowered to perform the first operation.
  • hydraulic fluid is supplied to the injection cylinder head chamber 16H.
  • the low-speed forward speed of injection is used to control the rotation speed of servo motor 1. So do it.
  • FIG. 8 c shows the state of the hydraulic circuit at the time of high-speed injection (step) corresponding to FIG. 2 b of the first embodiment.
  • valve D 2 5 is set so that booster head chamber 8 H and injection cylinder head chamber 16 H communicate with each other, and valve M 24 is opened.
  • the hydraulic oil from the piston accumulator 3 1 for injection is also introduced into the injection cylinder head chamber 16H. This is the same as in the first embodiment.
  • the hydraulic oil in the injection cylinder rod chamber 1 6 R is returned to the tank 3 5 via the valve M 2 4 and passes through another line 6 8 to the throttle 2 8 and the open state.
  • the valve B (switching valve) 2 2 is returned to the tank 3 5 in this order.
  • a position detection sensor (not shown) for the injection piston 15 is provided to detect that the injection piston 15 has reached a preset position. To be implemented.
  • FIG. 8d shows the state of the hydraulic circuit during pressure increase corresponding to FIG. 2c of the first embodiment.
  • valve D 2 5 is set so that the booth evening chamber 8 H and the injection cylinder header chamber 16 H communicate with each other, but valve M 2 4 is switched. Therefore, a part of the hydraulic oil in the injection cylinder head chamber 16 H is connected to the valve M 2 4 and valve A 2 1 (valve A 2 1 is open).
  • valve A 2 1 is open.
  • the hydraulic oil in the injection cylinder rod chamber 16 R is returned to the tank 35 via the throttle 28 and the valve B 22 (open state) as shown in Fig. 8d.
  • the pressure in the injection cylinder head chamber 16 H is fed back in real time according to the boost pattern preset by the valve M 24, and the boost upper limit value is determined by the torque control of the thermop overnight.
  • the aperture amount of aperture 28 is set to be constant. In this way, the boost pressure is maintained at an appropriate value. Is done. Switching from high-speed injection process to pressurization process is done by injection piston.
  • FIG. 8 e shows the state of the hydraulic circuit during pressurization and holding corresponding to FIG. 2 d of the first embodiment.
  • FIGS. 8f and 8g show the state of the hydraulic circuit during the ejecting operation (process) and the backward operation (process) corresponding to FIGS. 2e and 2f of the first embodiment.
  • the hydraulic circuit during these operations is basically the same as that of the first embodiment as shown in FIGS. 8f and 8g, and thus detailed description thereof is omitted.
  • the booth evening piston rod 5 is raised by the thermopow 1 to push out the hydraulic fluid in the booster rod chamber 8R, and this hydraulic fluid is injected into the injection cylinder rod chamber.
  • 1 6 R By feeding to 1 6 R, drive the injection piston 1 5 in Fig. 8 g back in the direction.
  • the injection low speed is operated by the electric booth evening
  • the high speed injection is operated by the accumulator (A C C).
  • the conventional machine shown in FIG. 10 performs injection of the low-speed and high-speed stroke of the injection piston 15 with the pressure oil of the piston accumulator 31.
  • the oil supply capacity of the electric booth evening is large, and the amount of molten metal charged to the accumulator evening is about half that of the conventional machine. ACC) The charge can be fully implemented.
  • Fig. 11 shows a table comparing the accumulator charge (filling) time and the shortest hot water supply time for the actual actual machine.
  • the accumulator charge (fill) is Explain what is possible.
  • Fig. 11 shows that the accumulator (A C C) charge is completed within the hot water supply time on the mold clamping machine 3 75 t to 4 00 0 t.
  • the maximum speed required for low-speed injection is 0.5 mZ sec or more (actually set to 0.8 m / sec or 1. O m / sec), and the maximum amount of molten metal supplied into the injection sleeve Is at most 70% of the sleeve's internal volume. Therefore, the maximum required volume of accumulator evening (A C C) used for high-speed injection is 70% of the total stroke X cylinder area.
  • the accumulator charge time (t) shown in Fig. 11 can be obtained by the following formula.
  • V AXLX 0. 7 X 1 0-4 (Little) ⁇ ⁇ • [Formula 1]
  • Q AX 5 0 0 X 1 0— 4 (Little / sec)
  • V Required oil amount (liter) supplied to injection cylinder for high speed
  • A Injection cylinder area (cm 2)
  • L Total injection stroke (mm)
  • Q Electric booster supply oil capacity (Little sec)
  • t ACC charge time (sec).
  • FIG. 12 shows the structure of the device of the present invention.
  • Fig. 21 shows another structure of the device of the present invention.
  • FIG. 12 First, the structure shown in FIG. 12 and its driving mode will be described.
  • the movable mold 10 4 fixed to the movable plate 10 0 2 is closed with respect to the fixed die 10 3 fixed to the fixed plate 10 1.
  • a mold cavity 1 0 5 is formed.
  • An injection sleeve 10 6 is connected to the fixed mold 10 3, and a plunger rod 1 0 8 having a plunger tip 1 0 7 sliding at the tip of the injection sleeve 1 0 6 is driven at a high speed.
  • the molten metal held in the injection sleep 10 6 is filled into the mold cavity 1 0 5.
  • the rear end of the plunger rod 1 0 8 constitutes a piston 1 1 3 that slides in the hydraulic cylinder 1 0 9, and the plunger rod 1 0 8 is a hydraulic control mechanism including the hydraulic cylinder 1 0 9 Driven by 1 1 0.
  • the hydraulic control mechanism 1 1 0 includes an accumulator 1 1 1 connected to a hydraulic cylinder 1 0 9 via a high-speed valve 1 1 2, and activates the electromagnetic switching mechanism M according to a control signal (not shown) to activate the high-speed valve.
  • Open 1 1 2 supply hydraulic oil from Accumule overnight 1 1 1 to oil chamber 1 1 6 H behind piston 1 1 3, and drive plunger rod 1 0 8.
  • the hydraulic oil 1 1 6 R and 1 16 H in the accumulator 1 1 1 and in the hydraulic cylinder 1 0 9 A hydraulic sensor (not shown) that detects hydraulic pressure is installed.
  • Piston 1 1 3 In the oil chamber 1 1 6 H behind the piston chamber, the plunger rod 1 10 8 is controlled with high precision to produce high-quality forged products with high yield.
  • a piston rod 1 1 4 is provided that moves back and forth in the direction of 10 8 and retreats and realizes high-speed injection in cooperation with the plunger rod 10 8 at the time of injection.
  • the rear end of the piston rod 1 1 4, which is a feature of the present invention, is connected to the end of the pole screw 1 1 7 of the pole screw mechanism 1 1 8 via the connecting member 1 1 5.
  • the piston rod 1 1 9 and the pole screw mechanism 1 1 8 and the rod rod mechanism 1 1 8 are controlled by the rotation of the servo motor 1 1 9 according to the signal from the control device (not shown) that constitutes the advance / retreat control mechanism. It is possible to control the advance / retreat of 4 including the advance / retreat speed.
  • the piston rod 1 1 4 and the plunger rod 1 0 8 are integrated or separately by rotating the support rod 1 1 9 to the left and right at the required number of revolutions according to the control signal. 0 7 can be pushed into the injection sleeve at the required speed for the required distance.
  • the advance / retreat control mechanism does not directly drive the plunger rod or the hydraulic control mechanism, but cooperates with the plunger rod behind the plunger rod controlled by the hydraulic control mechanism. It is a feature of the present invention that a piston rod that realizes high-speed ejection is arranged, and the advance and retreat of the piston rod is controlled by the advance / retreat control mechanism.
  • the hydraulic control mechanism and the advance / retreat control mechanism are combined.
  • the hybrid high-speed injection structure that synergistically exerts its effects is a feature.By adopting this, the drive of the plunger rod is controlled with high accuracy, and high-quality forged products are produced with high yield. Can be manufactured.
  • the forward / backward control mechanism is a mechanism that only controls the forward / backward movement of the piston rod. Therefore, when the hydraulic control mechanism is advanced / retracted or when the plunger rod is advanced / retracted (in this case, the plunger
  • the advance / retreat control mechanism can be made smaller and lighter than the control system (including the hydraulic control mechanism). This is also a feature of the present invention.
  • Fig. 12 shows the pole screw mechanism 1 1 8 as one configuration of the advance / retreat control mechanism.
  • the advance / retreat control mechanism is a mechanical mechanism that moves the piston port forward or backward with good controllability.
  • the advance / retreat control mechanism may be, for example, a rack and pinion mechanism.
  • Fig. 13 shows the aspect of the apparatus of the present invention immediately before the injection is started after a predetermined amount of molten metal is poured into the injection sleeve from the pouring port (not shown) (see Fig. 12). At this time, the plunger rod 1 0 8 is retracted to the end of the hydraulic cylinder 1 0 9 and the piston rod 1 1 4 is in contact with the piston 1 1 8 of the plunger rod 1 0 8 and waits. Yes.
  • the servo motor 1 1 9 is rotated according to the control signal to drive the ball screw mechanism 1 1 8, and the piston rod 1 1 4 is integrated with the plunger rod 1 0 8 to be predetermined. Move forward against the stationary plate at a speed of.
  • the electromagnetic switching mechanism M is activated to close the high-speed valve 1 1 2 and in front of the piston rod 1 1 4 and the plunger rod 1 0 8 Following the progress, supply hydraulic oil to the oil chamber 1 1 6 H behind the piston 1 1 3 and discharge the hydraulic oil from the oil chamber 1 1 6 R ahead.
  • the plunger rod 1 0 8 integrated with the piston rod 1 1 4 advances the low-speed injection region in the injection sleeve at a predetermined advance speed that the pole screw mechanism 1 1 8 forms and maintains.
  • the forward distance of the plunger rod 10 8 is detected by a displacement sensor (not shown), and the tip of the plunger rod 10 8 8 switches from low-speed injection to high-speed injection (low-speed-high-speed switching position S, Fig.
  • the plunger rod 1 0 8 is advanced only by the pole screw mechanism 1 1 8 until it reaches 1 4).
  • the forward speed of the plunger rod 10 8 may be kept constant until the low speed / high speed switching position S is reached, or may be accelerated halfway.
  • the pole screw mechanism 1 1 8 is continuously driven to move the piston rod 1 1 4 forward and the oil chamber 1 1 6 H Pressurize hydraulic fluid. With this pressurization, the forward speed of the plunger rod 108 can be further increased, and the molten metal in the injection sleeve can be filled into the mold cavity at a stable high speed. As a result, high-quality manufactured products can be manufactured with high yield.
  • the plunger rod is at the low speed / high speed switching position.
  • the plunger rod Until it reaches S, the plunger rod is integrated with the piston rod and advanced only by the advance / retreat control mechanism without driving the hydraulic control mechanism, and the plunger rod moves to the low-speed switching position S.
  • it adopts a hybrid high-speed injection structure that drives the hydraulic control mechanism and advances the plan jar rod at high speed in cooperation with the advance / retreat control mechanism and the hydraulic control mechanism.
  • the advance / retreat control mechanism only needs to have a function and capacity to advance / retreat the piston rod integrated with the plunger or the piston rod alone, so that the entire hydraulic control mechanism is advanced / retreated. Compared to the conventional mechanism, it can be further reduced in size and weight. As a result, the entire injection device is reduced in size and weight, and the maintainability of the injection device is improved.
  • the feature of the apparatus of the present invention is that the size, weight, and maintainability are remarkably achieved.
  • the advance / retreat control mechanism and the hydraulic pressure are increased until the increased pressure reaches a predetermined value. Drive the control mechanism continuously.
  • hydraulic oil in the rear 1 1 6 H is discharged from the discharge path while pressure is continuously applied to plunger rod 1 0 8 Plunger rod 1 0 8 advances further and the head pressure further increases.
  • the high-speed valve 1 1 2 is controlled in real time according to the injection pressure setting shown in Fig. 20.
  • the hydraulic oil in the oil chamber 1 1 6 H is accumulated in the accumulator 1 1 1.
  • the set pressure Pm is maintained by the torque control of the servo motor until the cooling time expires and die casting is completed.
  • the hydraulic control mechanism After discharging the remaining coagulated material, as shown in Fig. 19, the hydraulic control mechanism is driven to supply hydraulic oil to the oil chamber 1 1 6 R in front of the piston 1 1 3, and the piston 1 1 3 The hydraulic oil is discharged from the rear oil chamber 1 1 6 H, and the advance / retreat control mechanism is driven to retract the plunger rod 1 0 8 and the piston rod 1 1 4 to prepare for the next injection. 1 Wait at the position shown in 3.
  • the injection speed in the device of the present invention has the same transition as the injection speed in normal die casting, but the injection pressure is different from the linear rise process in normal die casting (see dotted line in the figure) 2 steps Will rise. This is also a feature of the present invention.
  • the injection pressure can be controlled by the program and increased to the set pressure P m, so that a high-quality manufactured product can be manufactured with a high yield.
  • FIG. 21 Next, the structure shown in FIG. 21 and its driving mode will be described.
  • the structure shown in Fig. 21 is basically the same as that shown in Fig. 12.
  • FIG. 21 the same configuration as that shown in FIG. 12 is given the same numeral as that in FIG. 12. However, a part of the hydraulic circuit constituting the hydraulic control mechanism is omitted. ing.
  • FIGS. Fig. 2 2 shows the mode of the present invention just before starting injection after pouring a predetermined amount of molten metal Me into the injection sleeve from the pouring port (not shown) (see Fig. 21). .
  • the plunger rod 1 0 8 is retracted to the end set by the positioning member 1 2 2 in the hydraulic cylinder 1 0 9, and the piston rod 1 1 4 is the oil chamber. 1 1 Waiting at the top of 6H.
  • thermoplum 1 1 9 is rotated to drive the pole screw mechanism 1 1 8, and the piston rod 1 1 4 is moved below the oil chamber 1 1 6 H. Move forward.
  • the plunger rod 1 0 8 is structurally not integrated with the piston rod 1 1 4, but its operation is integrated with the piston rod 1 1 4, and the predetermined advance that the pole screw mechanism 1 1 8 forms and maintains. The speed will advance the low speed injection area in the injection sleeve.
  • the forward distance of the plunger rod 10 8 is detected by a displacement sensor (not shown), and the tip of the plunger rod 1 0 8 switches to the position where the low speed injection is switched to the high speed injection (the low speed one high speed switching position S, The plunger rod 1 0 8 is advanced only with the pole screw mechanism 1 1 8 through the advancement of the piston rod 1 1 4 until it reaches (see Fig. 14).
  • the forward speed of the plunger rod 10 8 may be kept constant until the low speed / high speed switching position S is reached, or may be accelerated halfway. When accelerating from the middle, increase the rotation speed of the support motor Plunger rod 1 0 8 force When the low-speed one high-speed switching position S is reached, as shown in Fig. 24, the electromagnetic switching mechanism M is activated to open the high-speed valve 1 1 2, and from the accumulator 1 1 1 to hydraulic oil The rear oil chamber 1 1 6
  • Hydraulic oil is discharged from the front oil chamber 1 1 6 R.
  • the plunger rod 10 8 is structurally not integrated with the piston rod 1 1 4, but is integrated with the piston rod 1 1 4 in terms of operation. , 'The pole screw mechanism 1 1 8 will move forward in the low-speed injection area in the injection sleeve at a predetermined forward speed that is formed and maintained.
  • the drive mode of the device of the present invention shown in FIG. 21 is the same as the drive mode of the device of the present invention shown in FIG. 12, and the structure shown in FIG. 21 is the same as that of the hybrid high-speed injection structure. One.
  • the advance / retreat control mechanism and the hydraulic pressure are increased until the increased pressure reaches a predetermined value. Drive the control mechanism continuously.
  • the high-speed valve 1 1 2 is controlled in real time according to the injection pressure setting shown in Fig. 29. As shown, the hydraulic oil in the oil chamber 1 16 H is accumulated in the accumulator 1 1 1. Until the cooling time expires and die casting fabrication is completed, the set pressure P m is maintained by the torque control of the thermo-motor.
  • the hydraulic control mechanism is driven to supply the hydraulic oil to the oil chamber 1 1 6 R in front of the piston 1 1 3 while the piston 1 1 3 Drain the hydraulic oil from the rear oil chamber 1 1 6 H and retract the plunger rod 1 0 8 and drive the advance / retreat control mechanism to retract the piston rod 1 1 4 Prepare for the next injection in the position shown in Fig. 22.
  • a high-quality manufactured product can be manufactured with a high yield.
  • the present invention realizes further miniaturization and weight reduction, and has excellent maintainability. Therefore, the present invention has high applicability in the die casting industry.
  • a switching valve is provided in the hydraulic circuit of the injection device during pressurization holding so that the injection cylinder head chamber
  • the oil supply capacity of the electric booth is large, and the amount of molten metal that is charged (filled) into the accumulator (ACC) is about half that of the conventional machine. Accumulation overnight charge can be performed in the process time. That is This shortens the time from completion of injection to the start of high-speed injection, reduces the amount of leakage from the circuit, and enables high-speed injection while the accumulator pressure is within the allowable value.
  • the booth evening piston rod 5 is described as a configuration that is driven by a support motor 1 that is a driving source through a transmission mechanism including a pole nut gear 3 and a pole screw shaft 4.
  • the present invention is not limited to this, and it may be replaced by another electric drive source known to those skilled in the art, such as an AC motor controlled by an inverter.
  • the transmission mechanism may also be another transmission mechanism known to those skilled in the art, such as a rack-pinion type, for example.
  • the hydraulic circuit of the injection device is Although specified, the present invention is not limited to this, and the booster piston rod can be driven with a force corresponding to the product of the area of the booster piston rod and the pressure during pressure holding. Any hydraulic circuit that can be included within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif d'injection hybride pour une machine à couler sous pression, dans lequel une importante perte de courant électrique est empêchée de se produire en évitant un courant important pendant l'opération de maintien et de pressurisation et dans lequel la dimension d'un moteur est réduite. Le dispositif d'injection présente un cylindre d'injection (16) permettant d'accueillir un piston d'injection (15) afin d'injecter un métal en fusion dans un moule et un booster électrique (8) fonctionnant avec un cylindre hydraulique. Une chambre supérieure (8H) d'un booster électrique est en communication fluidique avec la chambre supérieure (16H) du cylindre d'injection. La chambre supérieure (8H) bouge de façon linéaire une tige de piston de booster (5) reçue dans le booster électrique (8) afin de pousser et faire bouger le piston d'injection, effectuant un moulage par injection. Etant donné qu'une soupape d'arrêt (25) est installée dans un tuyau reliant la chambre supérieure (16H) du cylindre d'injection et la chambre de tige (8R) du booster (8), le dispositif d'injection peut produire de la pression par la surface supérieure du booster électrique pendant le boostage et produit de la pression par sa surface supérieure pendant l'opération de maintien et de pressurisation.
PCT/JP2007/068734 2006-09-20 2007-09-19 Dispositif d'injection pour une machine à couler sous pression WO2008035805A1 (fr)

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CNA2007800346968A CN101516546A (zh) 2006-09-20 2007-09-19 压铸机的注射装置
US12/441,406 US20090242161A1 (en) 2006-09-20 2007-09-19 Injection device for die casting machine

Applications Claiming Priority (6)

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JP2006254002A JP5109314B2 (ja) 2006-09-20 2006-09-20 制御性に優れたハイブリッド高速射出装置及び制御方法
JP2006-254002 2006-09-20
JP2006-324000 2006-11-30
JP2006324000 2006-11-30
JP2007-143347 2007-05-30
JP2007143347A JP2008155280A (ja) 2006-11-30 2007-05-30 ダイカストマシンの射出装置

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WO2010013674A1 (fr) * 2008-07-29 2010-02-04 東洋機械金属株式会社 Machine de coulée sous pression
WO2013005597A1 (fr) * 2011-07-06 2013-01-10 株式会社 豊田自動織機 Appareil d'injection
WO2013058103A1 (fr) * 2011-10-19 2013-04-25 株式会社 豊田自動織機 Appareil d'injection
WO2013058102A1 (fr) * 2011-10-19 2013-04-25 株式会社 豊田自動織機 Appareil d'injection
WO2013058101A1 (fr) * 2011-10-19 2013-04-25 株式会社 豊田自動織機 Appareil d'injection
CN117340218A (zh) * 2023-10-09 2024-01-05 河南永荣动力股份有限公司 一种笼型电机转子的自动压力铸铝设备及其控制方法

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CN102378656B (zh) * 2009-03-31 2014-01-22 宇部兴产机械株式会社 压铸机的注射装置及其控制方法
JP5506909B2 (ja) * 2010-02-19 2014-05-28 リューベ株式会社 潤滑油用ポンプ装置
JP5665492B2 (ja) * 2010-11-11 2015-02-04 東洋機械金属株式会社 中子駆動用油圧ユニットを備えた電動型ダイカストマシン
JP5657355B2 (ja) * 2010-11-24 2015-01-21 東洋機械金属株式会社 ダイカストマシン及びダイカストマシンの異常検出方法
CN103501938B (zh) 2011-05-02 2015-09-09 东芝机械株式会社 成型机的射出装置
JP5760769B2 (ja) 2011-07-06 2015-08-12 株式会社豊田自動織機 射出装置
JP5644735B2 (ja) * 2011-10-19 2014-12-24 株式会社豊田自動織機 射出装置
JP5961411B2 (ja) * 2012-03-09 2016-08-02 東洋機械金属株式会社 ダイカストマシン及びダイカストマシンの制御方法
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JP5870857B2 (ja) * 2012-06-21 2016-03-01 株式会社豊田自動織機 射出装置
JP6196524B2 (ja) * 2013-10-22 2017-09-13 株式会社スギノマシン 液圧式拡管装置
CN104308132B (zh) * 2014-10-29 2016-06-01 苏州明志科技有限公司 一种翻转式浇注模具
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JP7132876B2 (ja) * 2019-03-04 2022-09-07 芝浦機械株式会社 射出装置及び成形機
WO2021014707A1 (fr) 2019-07-24 2021-01-28 芝浦機械株式会社 Machine de moulage sous pression
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WO2010013674A1 (fr) * 2008-07-29 2010-02-04 東洋機械金属株式会社 Machine de coulée sous pression
JP2010029908A (ja) * 2008-07-29 2010-02-12 Toyo Mach & Metal Co Ltd ダイカストマシン
CN102112257A (zh) * 2008-07-29 2011-06-29 东洋机械金属株式会社 压铸机
US8307884B2 (en) 2008-07-29 2012-11-13 Toyo Machinery & Metal Co., Ltd. Die casting machine
US9266269B2 (en) 2011-07-06 2016-02-23 Kabushiki Kaisha Toyota Jidoshokki Injection apparatus
WO2013005597A1 (fr) * 2011-07-06 2013-01-10 株式会社 豊田自動織機 Appareil d'injection
WO2013058103A1 (fr) * 2011-10-19 2013-04-25 株式会社 豊田自動織機 Appareil d'injection
WO2013058102A1 (fr) * 2011-10-19 2013-04-25 株式会社 豊田自動織機 Appareil d'injection
WO2013058101A1 (fr) * 2011-10-19 2013-04-25 株式会社 豊田自動織機 Appareil d'injection
JP2013086399A (ja) * 2011-10-19 2013-05-13 Toyota Industries Corp 射出装置
US9056418B2 (en) 2011-10-19 2015-06-16 Kabushiki Kaisha Toyota Jidoshokki Injection apparatus
EP2769821A4 (fr) * 2011-10-19 2015-07-29 Toyota Jidoshokki Kk Appareil d'injection
US9248596B2 (en) 2011-10-19 2016-02-02 Kabushiki Kaisha Toyota Jidoshokki Injection apparatus
US9364983B2 (en) 2011-10-19 2016-06-14 Kabushiki Kaisha Toyota Jidoshokki Injection apparatus
CN117340218A (zh) * 2023-10-09 2024-01-05 河南永荣动力股份有限公司 一种笼型电机转子的自动压力铸铝设备及其控制方法
CN117340218B (zh) * 2023-10-09 2024-05-07 河南永荣动力股份有限公司 一种笼型电机转子的自动压力铸铝设备及其控制方法

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