Full Electric Neutron Drive Device and Molding Machine

Abstract

To provide an all-electric core drive that can save energy, suppress the deterioration of the work environment due to oil stains, reduce the size, and shorten the cycle time.SOLUTION: An all-electric core drive of an embodiment includes a cylinder tube, a first cover member fixed to one end of the cylinder tube, a second cover member fixed to the other end of the cylinder tube, a rod at least partially provided in the cylinder tube and having a connecting part capable of connecting a core having a first inclining member or a first inclining recess at one end and penetrating the first cover member and capable of linear motion with respect to the cylinder tube, a nut fixed to the rod, a screw shaft penetrating through the second cover member and the nut and provided so as to be inserted in the rod and capable of rotary motion, and a motor for rotating the screw shaft.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to an all-electric neutron drive device and a molding machine used when manufacturing a product using a mold having neutrons.

Background Art

[0002] A die-casting machine, which is an example of a molding machine, manufactures a product (die-cast product) by filling a cavity (hollow part) in a mold clamped using a mold clamping device with molten metal (molten material) using an injection device. When the product has a shape (undercut) that cannot be removed parallel to the mold opening and closing direction, in addition to the fixed mold and the movable mold, a mold having neutrons is used.

[0003] Patent Document 1 describes a neutron drive device that can exert the force required for extraction by the action of an inclined pin when extracting neutrons from a product, and can extract at a high speed by the action of a hydraulic cylinder for neutron extraction after the neutrons have once moved. When a hydraulic cylinder is used in a neutron drive device, there are problems such as difficulty in energy saving, difficulty in miniaturization, and deterioration of the working environment due to oil contamination.

[0004] Also, for example, when a hydraulic cylinder is used in a neutron drive device, it is assumed that the mold clamping device of a die-casting machine and the hydraulic circuit of the neutron drive device are shared. When the hydraulic circuits are shared, the opening and closing operations of the fixed mold and the movable mold and the operation of the neutrons cannot be performed simultaneously, and it is difficult to shorten the cycle time of the die-casting machine.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The problem to be solved by the present invention is to provide an all-electric core driving device and a molding machine capable of achieving energy saving, miniaturization, suppression of deterioration of the working environment due to oil contamination, and shortening of the cycle time.

Means for Solving the Problem

[0007] The all-electric core driving device according to one aspect of the present invention includes a cylinder tube, a first cover member fixed to one end of the cylinder tube, a second cover member fixed to the other end of the cylinder tube, and a connecting portion having a core that is at least partially provided in the cylinder tube and has a first inclined member or a first inclined concave portion and can be connected to one end. A rod that penetrates the first cover member and is capable of linear motion with respect to the cylinder tube, a nut fixed to the rod, a screw shaft that penetrates the second cover member and the nut and is provided so as to be insertable into the rod and capable of rotational motion, and a motor that rotates the screw shaft. A control unit that controls the motor; with Well, the control unit drives the motor to apply torque to the screw shaft to move the rod in a direction protruding from the first cover member. The control unit stops the movement of the rod at a position where the first inclined member can engage with a second inclined recess provided in the fixed mold, or at a position where the first inclined recess can engage with a second inclined member provided in the fixed mold. After the control unit stops the movement of the rod, after a part of the first inclined member is inserted into the second inclined recess, or after a part of the second inclined member is inserted into the first inclined recess, the torque applied to the screw shaft is released. .

[0009] In the all-electric core driving device of the above aspect, it further includes an elastic body. The rod has an annular flange provided on the side of the second cover member rather than the connecting portion, and the elastic body is preferably provided in the cylinder tube between the flange and the first cover member.

[0010] The all-electric neutron drive device according to one aspect of the present invention is , a cylinder tube, a first cover member fixed to one end of the cylinder tube, a second cover member fixed to the other end of the cylinder tube, a connecting portion having at least a part provided in the cylinder tube and having a neutron connectable to one end having a first inclined member or a first inclined recess, a rod passing through the first cover member and capable of linear movement with respect to the cylinder tube, a nut fixed to the rod, a screw shaft passing through the second cover member and the nut and provided so as to be insertable into the rod and capable of rotational movement, a motor for rotating the screw shaft, an elastic body, a support portion, comprising Well, the support portion is fixed to a part of the rod outside the cylinder tube, and the elastic body can be arranged between the support portion and the movable mold.

[0012] A molding machine according to one aspect of the present invention includes a base, a core having a first inclined member or a first inclined recess, a fixed mold having a second inclined recess engageable with the first inclined member or a second inclined member engageable with the first inclined recess, a movable mold, a fixed die plate fixed on the base and holding the fixed mold, a movable die plate movably provided on the base in the mold opening and closing direction and holding the movable mold opposite to the fixed mold, an all-electric core driving device driving the core and fixed to the movable die plate, a mold clamping device for clamping the fixed mold and the movable mold, and an injection device for filling a molten material into a cavity formed by the fixed mold, the movable mold and the core. The all-electric core driving device includes a cylinder tube, a first cover member fixed to one end of the cylinder tube, a second cover member fixed to the other end of the cylinder tube, a connecting portion having at least a part provided in the cylinder tube and connectable to the core at one end, penetrating the first cover member and capable of making a rectilinear motion with respect to the cylinder tube, a rod, a nut fixed to the rod, a screw shaft penetrating the second cover member and the nut and insertably provided in the rod and capable of making a rotational motion, and a motor for rotating the screw shaft. a control unit that controls the motor; comprising Well, the control unit drives the motor to apply torque to the screw shaft to move the rod in a direction protruding from the first cover member. The control unit stops the movement of the rod at a position where the first inclined member can engage with the second inclined recess, or at a position where the first inclined recess can engage with the second inclined member. After the control unit stops the movement of the rod, after a part of the first inclined member is inserted into the second inclined recess, or after a part of the second inclined member is inserted into the first inclined recess, the torque applied to the screw shaft is released. .

[0014] In the molding machine of the above aspect, the all-electric core driving device further includes an elastic body. The rod has an annular flange provided on the side of the second cover member rather than the connecting portion, and the elastic body is preferably provided in the cylinder tube between the flange and the first cover member.

[0015] A molding machine according to one embodiment of the present invention includes a base, a core having a first inclined member or a first inclined recess, a fixed mold having a second inclined recess engageable with the first inclined member or a second inclined member engageable with the first inclined recess, a movable mold, a fixed die plate fixed on the base for holding the fixed mold, a movable die plate provided movably in the mold opening and closing direction on the base for holding the movable mold opposite to the fixed mold, an all-electric core driving device for driving the core and fixed to the movable die plate, a mold clamping device for clamping the fixed mold and the movable mold, and an injection device for filling a molten material into a cavity formed by the fixed mold, the movable mold and the core. The all-electric core driving device includes a cylinder tube, a first cover member fixed to one end of the cylinder tube, a second cover member fixed to the other end of the cylinder tube, a connecting portion at least partially provided in the cylinder tube and having a connection end connectable to the core, a rod passing through the first cover member and capable of linear movement with respect to the cylinder tube, a nut fixed to the rod, a screw shaft provided insertably in the rod and capable of rotational movement and passing through the second cover member and the nut, and a motor for rotating the screw shaft. An elastic body and a support portion comprising Well, the support portion is fixed to a part of the rod outside the cylinder tube, and the elastic body is disposed between the support portion and the movable mold. thereof.

Advantages of the Invention

[0017] According to the present invention, it is possible to provide an all-electric core driving device and a molding machine that can achieve energy savings, downsizing, suppression of deterioration of the working environment due to oil stains, and shortening of the cycle time.

Brief Description of the Drawings

[0018]

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Mode for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0020] In this specification, as an example of hydraulic pressure, oil pressure will be used for explanation. For example, as an example of a hydraulic circuit, a hydraulic circuit will be used for explanation. Instead of oil pressure, for example, water pressure can also be used. Also, in this specification, as an example of the working fluid, hydraulic oil will be used for explanation.

[0021] (First Embodiment) The all-electric neutron driving device of the first embodiment includes a cylinder tube, a first cover member fixed to one end of the cylinder tube, a second cover member fixed to the other end of the cylinder tube, and a connecting portion having at least a part provided in the cylinder tube and capable of connecting a neutron having a first inclined member or a first inclined concave portion to one end. The connecting portion penetrates the first cover member and is a rod capable of linear motion with respect to the cylinder tube, a nut fixed to the rod, a screw shaft provided so as to be insertable into the rod through the second cover member and the nut and capable of rotational motion, and a motor for rotating the screw shaft.

[0022] Further, the molding machine of the first embodiment includes a base, a neutron having a first inclined member or a first inclined concave portion, a fixed mold having a second inclined concave portion engageable with the first inclined member or a second inclined member engageable with the first inclined concave portion, a movable mold, a fixed die plate fixed on the base and holding the fixed mold, a movable die plate provided movably in the mold opening and closing direction on the base and holding the movable mold facing the fixed mold, an all-electric neutron driving device that drives the neutron and is fixed to the movable die plate, a mold clamping device that clamps the fixed mold and the movable mold, and an injection device that fills a molten material into a cavity formed by the fixed mold, the movable mold, and the neutron. And the all-electric neutron driving device includes a cylinder tube, a first cover member fixed to one end of the cylinder tube, a second cover member fixed to the other end of the cylinder tube, a connecting portion having at least a part provided in the cylinder tube and capable of connecting a neutron to one end, the connecting portion penetrates the first cover member and is a rod capable of linear motion with respect to the cylinder tube, a nut fixed to the rod, a screw shaft provided so as to be insertable into the rod through the second cover member and the nut and capable of rotational motion, and a motor for rotating the screw shaft.

[0023] FIG. 1 is a schematic diagram showing the overall configuration of the molding machine of the first embodiment. FIG. 1 is a side view including a partial cross-sectional view. The molding machine of the first embodiment is a die casting machine 1000. The die casting machine 1000 is a cold chamber type die casting machine.

[0024] The die-casting machine 1000 includes a fixed mold 10, a movable mold 12, a core 14, a mold clamping device 16, an extrusion device 18, an injection device 20, a control device 22, a hydraulic circuit 24, and an all-electric core driving device 100. The die-casting machine 1000 includes a base 26, a fixed die plate 28, a movable die plate 30, a link housing 32, and tie bars 34.

[0025] The die-casting machine 1000 injects and fills a molten metal (molten material), which is a liquid metal, into the inside of the mold (cavity Ca in FIG. 1) composed of the fixed mold 10, the movable mold 12, and the core 14. Then, by solidifying the molten metal in the mold, die-cast products are manufactured. The metal is, for example, aluminum, an aluminum alloy, a zinc alloy, or a magnesium alloy.

[0026] The mold includes the fixed mold 10, the movable mold 12, and the core 14. The mold is provided between the mold clamping device 16 and the injection device 20. The core 14 is combined with the fixed mold 10 and the movable mold 12.

[0027] The fixed die plate 28 is fixed on the base 26. The fixed die plate 28 can hold the fixed mold 10.

[0028] The movable die plate 30 is provided on the base 26 so as to be movable in the mold opening and closing direction. The mold opening and closing direction means both the mold opening direction and the mold closing direction shown in FIG. 1. The movable die plate 30 can hold the movable mold 12 facing the fixed mold 10.

[0029] The link housing 32 is provided on the base 26. One end of the link mechanism constituting the mold clamping device 16 is fixed to the link housing 32.

[0030] The fixed die plate 28 and the link housing 32 are fixed by the tie bars 34. The tie bars 34 support the mold clamping force while the mold clamping force is applied to the fixed mold 10 and the movable mold 12.

[0031] The clamping device 16 has a function of opening and closing the mold and clamping the mold. The injection device 20 has a function of injecting molten metal into the cavity Ca of the mold and pressurizing the molten metal. The extrusion device 18 has a function of extruding the manufactured die-cast product from the mold.

[0032] The all-electric core-pulling device 100 has a function of inserting the core 14 into the fixed mold 10 or the movable mold 12 and pulling out the core 14 from the fixed mold 10 or the movable mold 12.

[0033] The hydraulic circuit 24 has a function of driving, for example, the clamping device 16, the extrusion device 18, and the injection device 20 by hydraulic pressure.

[0034] The control device 22 has a function of controlling, for example, the clamping device 16, the extrusion device 18, the injection device 20, and the all-electric core-pulling device 100. The control device 22 controls, for example, the clamping device 16 and the all-electric core-pulling device 100 so that the movable mold 12 and the core 14 move simultaneously.

[0035] The control device 22 has a function of performing various calculations and outputting control commands to each part of the die-casting machine 1000. The control device 22 has a function of storing, for example, the molding conditions and the like.

[0036] The control device 22 is composed of, for example, a combination of hardware and software. The control device 22 includes, for example, a CPU (Central Processing Unit), a semiconductor memory, and a control program stored in the semiconductor memory.

[0037] Figure 2 is a schematic diagram of the all-electric core-pulling device of the first embodiment. Figure 2 is a side view of the all-electric core-pulling device. Figure 3 is a schematic diagram of the all-electric core-pulling device of the first embodiment. Figure 3(a) is a top view, and Figure 3(b) is a bottom view.

[0038] The all-electric neutron driving device 100 of the first embodiment, for example, inserts neutrons into a fixed mold or a movable mold of a die-casting machine and extracts neutrons from the fixed mold or the movable mold. The all-electric neutron driving device 100 of the first embodiment is an all-electric type all-electric neutron driving device that is driven using only electric power as an energy source. The all-electric neutron driving device 100 is an actuator that uses electric power as an energy source to realize a reciprocating linear motion.

[0039] FIG. 4 is a schematic cross-sectional view of the all-electric neutron driving device of the first embodiment. FIG. 5 is a schematic cross-sectional view of the all-electric neutron driving device of the first embodiment. FIG. 5(a) shows the AA' cross-section of FIG. 4, and FIG. 5(b) shows the BB' cross-section of FIG. 4.

[0040] The all-electric neutron driving device 100 of the first embodiment includes a cylinder tube 40, a head cover 42 (first cover member), a cap cover 44 (second cover member), a rod 46, a nut 48, a screw shaft 50, a motor 52, a first pulley 54, a second pulley 56, a belt 58, a screw shaft guide 60, and a control unit 62.

[0041] The rod 46 has a coupling 46a (connecting portion) and a flange 46b. The motor 52 has a motor shaft 52a.

[0042] The cylinder tube 40 is, for example, cylindrical in shape.

[0043] The head cover 42 is fixed to one end of the cylinder tube 40. The head cover 42 has an opening through which the rod 46 passes. The head cover 42 and the cylinder tube 40 may be integrally formed, for example.

[0044] The cap cover 44 is fixed to the other end of the cylinder tube 40. The cap cover 44 is provided at the end of the cylinder tube 40 opposite to the head cover 42. The cap cover 44 has an opening through which the screw shaft 50 passes. The cap cover 44 and the cylinder tube 40 may be integrally formed, for example.

[0045] At least a part of the rod 46 is provided inside the cylinder tube 40. The rod 46 has a coupling 46a capable of connecting a core having an inclined pin at one end. For example, a fixing jig capable of fixing a core at the tip can be screwed to the coupling 46a.

[0046] The rod 46 has a flange 46b on the side of the cap cover 44 rather than the coupling 46a. The rod 46 has a flange 46b at the end on the side of the cap cover 44, for example. The flange 46b is annular. The flange 46b is annular, for example.

[0047] The rod 46 penetrates the head cover 42. The rod 46 is slidable with respect to the head cover 42.

[0048] At least a part of the rod 46 is cylindrical. For example, at least a part of the rod 46 is cylindrical. The rod 46 is capable of linear motion with respect to the cylinder tube 40.

[0049] The nut 48 is fixed to the rod 46. The nut 48 is fixed to the end on the side of the cap cover 44 of the rod 46, for example.

[0050] The screw shaft 50 penetrates the cap cover 44 and the nut 48. The screw shaft 50 is provided so as to be insertable into the rod 46. The screw shaft 50 is capable of rotational motion.

[0051] The screw shaft 50 is fitted with the nut 48. The screw shaft 50 and the nut 48 constitute a ball screw, for example. A ball is provided between the screw shaft 50 and the nut 48 to reduce the frictional resistance between the screw shaft 50 and the nut 48.

[0052] The screw shaft guide 60 is provided between the cap cover 44 and the screw shaft 50. The screw shaft guide 60 supports the screw shaft 50 in a rotatable state. The screw shaft guide 60 is a ball bearing, for example.

[0053] The motor 52 is fixed to the cap cover 44, for example. The motor 52 rotates the screw shaft 50. The motor 52 is a power source for rotating the screw shaft 50.

[0054] The motor 52 is a servo motor, for example. The motor 52 can perform torque control to keep the torque of the motor 52 constant, for example. The motor 52 can perform speed control to keep the speed of the rod 46 constant, for example.

[0055] The first pulley 54 is fixed to the end of the screw shaft 50. The second pulley 56 is fixed to the motor shaft 52a of the motor 52. The first pulley 54 and the second pulley 56 are connected by a belt 58.

[0056] Using the first pulley 54, the second pulley 56, and the belt 58, the rotation of the motor 52 is transmitted to the screw shaft 50, and the screw shaft 50 rotates. The ratio of the diameter of the first pulley 54 to the diameter of the second pulley 56 is determined so that the rotational speed of the screw shaft 50 becomes the desired rotational speed. Also, torque is applied from the motor 52 to the screw shaft 50 using the first pulley 54, the second pulley 56, and the belt 58.

[0057] The control unit 62 controls the motor 52. The control unit 62 is a control circuit, for example. The control unit 62 is composed of a combination of hardware and software, for example. The control unit 62 includes an encoder and a servo amplifier, for example.

[0058] The control unit 62 has a function of moving the rod 46 in a direction protruding from the head cover 42 by driving the motor 52 to apply torque to the screw shaft 50. The control unit 62 also has a function of stopping the movement of the rod 46 at a position where the tilt pin of the core 14 can engage with the tilt recess of the fixed mold 10 of the fixed mold 10. The control unit 62 also has a function of releasing the torque applied to the screw shaft 50 after the movement of the rod 46 has stopped and a part of the tilt pin has been inserted into the tilt recess.

[0059] Figure 4 shows the state where the rod 46 is in the retracted limit position. That is, Figure 4 shows the case where the rod 46 is in the position closest to the cap cover 44.

[0060] Figure 6 is an explanatory diagram of the operation of the all-electric neutron drive device according to the first embodiment.

[0061] When the motor 52 is driven as shown in Figure 6 from the state where the rod 46 shown in Figure 4 is in the retracted limit position, the motor shaft 52a rotates and the second pulley 56 rotates. The rotation of the second pulley 56 is transmitted to the first pulley 54 by the belt 58, and the first pulley 54 rotates. When the first pulley 54 rotates, the screw shaft 50 rotates.

[0062] The rotational movement of the screw shaft 50 is converted into the linear movement of the rod 46 fixed to the nut 48. The rod 46 moves forward toward the head cover 42 side.

[0063] It is also possible to rotate the screw shaft 50 in the reverse direction and retract the rod 46 by driving the motor 52 in the reverse rotation direction.

[0064] Figures 7 and 8 are diagrams showing the state where the all-electric neutron drive device according to the first embodiment is fixed to the mold. Figure 7 is a diagram showing the state where the mold is open. Figure 8 is a diagram showing the state where the mold is closed. Figures 7 and 8 show a part of the mold.

[0065] The mold includes a fixed mold 10, a movable mold 12, and a neutron 14. The neutron 14 is fixed to the all-electric neutron drive device 100. A fixing jig 66 fixing the neutron 14 is screwed to the coupling 46a. The neutron 14 and the fixing jig 66 can also be regarded as a part of the all-electric neutron drive device 100.

[0066] The all-electric neutron drive device 100 is fixed to the movable mold 12 by, for example, a fixed base 64.

[0067] The ejector 14 is provided with an inclined pin 14x (a first inclined member). The stationary mold 10 is provided with an inclined hole 10y (a second inclined recess) into which the inclined pin 14x can be inserted. The angle (θ in FIG. 7) between the direction in which the inclined pin 14x extends and the horizontal plane is, for example, 5 degrees or more and 30 degrees or less.

[0068] As shown in FIG. 8, in the state where the mold is closed, the ejector 14 is incorporated between the stationary mold 10 and the movable mold 12. In the state where the mold is closed, the inclined pin 14x of the ejector 14 is completely inserted into the inclined hole 10y of the stationary mold 10, and the ejector 14 is fixed to the stationary mold 10.

[0069] In the state where the mold is closed, the ejector 14 is fixed to the stationary mold 10 by the inclined pin 14x. The inclined pin 14x prevents the ejector 14 from being pushed out by the pressure (metal pressure) of the molten metal filling the cavity in the mold.

[0070] Next, an example of the operation of the die-casting machine 1000 will be described.

[0071] FIG. 9 is an explanatory diagram showing the operation of the molding machine according to the first embodiment.

[0072] In the molding operation of the die-casting machine 1000, there are a plurality of partial operations from the start to the end of the molding operation. The partial operations are, for example, as shown in FIG. 9, "ejector insertion", "mold clamping", "pouring", "injection", "cooling", "mold opening", "ejector return", "extrusion", "taking out".

[0073] FIGS. 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 are explanatory diagrams showing the operation of the molding machine according to the first embodiment. FIGS. 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 particularly show the operations of the stationary mold 10, the movable mold 12, and the ejector 14.

[0074] At the start of the forming operation, as shown in Fig. 10, the fixed mold 10 and the movable mold 12 are in an open state. The core 14 is in a state of being withdrawn from the fixed mold 10 and the movable mold 12.

[0075] "Inserting the core" is an operation of inserting the core 14 into the movable mold 12 using the all-electric core driving device 100. "Closing the mold" is an operation of closing the fixed mold 10 and the movable mold 12 in the mold closing direction and clamping the fixed mold 10 and the movable mold 12 using the mold clamping device 16.

[0076] At least part of the operations of "inserting the core" and "closing the mold" are performed simultaneously. Figs. 11, 12, 13, and 14 show the operations until the "inserting the core" and "closing the mold" are completed.

[0077] As shown in Fig. 11, the movable mold 12 is moved using the mold clamping device 16, and the fixed mold 10 and the movable mold 12 are closed in the mold closing direction. Simultaneously with this operation, an operation of inserting the core 14 into the movable mold 12 is performed using the all-electric core driving device 100. The insertion of the core 14 is performed by driving the motor 52 of the all-electric core driving device 100 to advance the rod 46.

[0078] The control unit 62 drives the motor 52 to apply torque to the screw shaft 50, thereby moving the rod 46 in a direction protruding from the head cover 42.

[0079] As shown in Fig. 12, for example, after the core 14 has advanced to a predetermined position, the all-electric core driving device 100 is stopped. The control unit 62 controls the motor 52 to stop the movement of the rod 46 at a predetermined position. The predetermined position is a vertical position where the inclined pin 14x of the core 14 can engage with the inclined hole 10y provided in the fixed mold 10.

[0080] The control unit 62 controls the motor 52 to keep the vertical position of the core 14 at the predetermined position. Thereafter, the movement of the movable mold 12 in the mold closing direction continues.

[0081] As shown in FIG. 13, after a part of the inclined pin 14x is inserted into the inclined hole 10y provided in the fixed mold 10, the control unit 62 releases the torque applied to the screw shaft 50 by the motor 52. The screw shaft 50 is put in a so-called torque-free state. In the state of FIG. 13, the core 14 has its vertical position maintained because a part of the inclined pin 14x is supported by the inclined hole 10y.

[0082] After that, the movement of the movable mold 12 in the mold-closing direction continues. As the movable mold 12 approaches the fixed mold 10, the inclined pin 14x is further inserted into the inclined hole 10y along the inclination of the inclined hole 10y.

[0083] As shown in FIG. 14, when the fixed mold 10 and the movable mold 12 come into contact, the inclined pin 14x is completely inserted into the inclined hole 10y. After that, a further clamping force is applied by the clamping device 16.

[0084] "Pouring" is an operation of supplying liquid metal (molten metal) to the injection sleeve of the injection device 20 using a hot water supply device (not shown).

[0085] "Injection" is an operation of injecting molten metal into the mold using the injection device 20. As shown in FIG. 15, the cavity Ca surrounded by the fixed mold 10, the movable mold 12, and the core 14 is filled with the molten metal 68.

[0086] When the cavity Ca is filled with the molten metal 68, the pressure (metal pressure) of the molten metal 68 is applied in the direction of pushing out the core 14. Since the inclined pin 14x is inserted into the inclined hole 10y, the core 14 is suppressed from being pushed out.

[0087] "Cooling" is an operation of cooling the molten metal 68 inside the mold to produce a die-cast product. As shown in FIG. 16, the molten metal 68 inside the mold is cooled to become a die-cast product 70.

[0088] "Mold opening" is an operation of opening the fixed mold 10 and the movable mold 12 in the mold opening direction using the mold clamping device 16. "Core return" is an operation of pulling out the core 14 from the movable mold 12.

[0089] At least part of the operations of "mold opening" and "core return" are performed simultaneously. Figures 17 and 18 show the operations until "mold opening" and "core return" are completed.

[0090] As shown in Figure 17, by moving the movable mold 12 in the mold opening direction using the mold clamping device 16, the die-cast product 70 is separated from the fixed mold 10. At the same time, when the inclined pin 14x is pulled out along the inclined hole 10y from the inclined hole 10y, the core 14 also moves upward, and the die-cast product 70 is separated from the core 14.

[0091] When the inclined pin 14x is completely pulled out from the inclined hole 10y, the control unit 62 drives the motor 52 to apply torque to the screw shaft 50. The rod 46 retracts, and the core 14 moves upward, that is, in the direction of being pulled out from the movable mold 12.

[0092] As shown in Figure 18, when the core 14 has retracted to a predetermined position, the drive of the motor 52 of the all-electric core drive device 100 is stopped. For example, the control unit 62 stops the drive of the motor 52 at the retraction limit position of the rod 46. Also, when the movable mold 12 has moved to a predetermined position, the mold clamping device 16 is stopped.

[0093] "Extrusion" is an operation of extruding the die-cast product 70 from the mold and detaching it from the mold using the extrusion device 18. As shown in Figure 19, the die-cast product 70 is detached from the movable mold 12.

[0094] "Taking out" is an operation of taking out the die-cast product 70 extruded from the mold, for example, by a robot arm. As shown in Figure 20, the die-cast product 70 is taken out from the mold by a robot arm (not shown) for example. After "taking out", for example, in order to manufacture the next die-cast product 70, it returns to "mold clamping".

[0095] Next, the operation and effects of the all-electric core-pulling device and the molding machine according to the first embodiment will be described.

[0096] When using a mold having cores, a core-pulling device is provided for inserting the cores into the fixed mold or the movable mold and for pulling out the cores from the fixed mold or the movable mold.

[0097] When injecting molten metal into the mold, the pressure of the molten metal (metal pressure) is applied in the direction of pushing out the cores. Therefore, a mechanism for suppressing the cores from being pushed out of the mold is required. Further, when pulling out the cores from the mold, a large driving force is required for the core-pulling device to separate the cores from the product.

[0098] The all-electric core-pulling device 100 according to the first embodiment uses a core 14 provided with an inclined pin 14x. When injecting molten metal into the mold, since the inclined pin 14x is inserted into the inclined hole 10y, the core 14 is suppressed from being pushed out of the mold.

[0099] Further, when the inclined pin 14x is pulled out from the inclined hole 10y, a force for moving the core 14 upward acts, and it becomes possible to separate the core 14 from the die-cast product 70. Therefore, a large driving force is not required for the all-electric core-pulling device 100, and the all-electric core-pulling device 100 can be miniaturized or energy-saving.

[0100] In addition, since all driving of the all-electric core-pulling device 100 is performed by electric power, energy saving of the all-electric core-pulling device 100 and the die-casting machine 1000 is possible, for example, as compared with the case of using a hydraulic circuit for driving.

[0101] Moreover, by performing all driving of the all-electric core-pulling device 100 by electric power, miniaturization of the all-electric core-pulling device 100 is realized.

[0102] In addition, since a hydraulic circuit is not used to drive the all-electric neutron driving device 100, for example, deterioration of the environment due to oil leakage is suppressed. Also, for example, the risk of fire due to oil leakage is reduced.

[0103] Moreover, the all-electric neutron driving device 100 is driven using a motor 52 dedicated to the all-electric neutron driving device 100. Therefore, it becomes possible to insert neutrons into the fixed die or the movable die and extract the neutrons from the fixed die or the movable die simultaneously with the opening and closing of the fixed die and the movable die. Accordingly, it becomes possible to shorten the cycle time of the die-casting machine 1000 using the all-electric neutron driving device 100. That is, it becomes possible to shorten the cycle time of manufacturing products by the die-casting machine 1000 using the all-electric neutron driving device 100.

[0104] From the viewpoint of performing torque control and accurate position control by the motor 52, the motor 52 is preferably a servo motor.

[0105] (Modification example) The modification example of the all-electric neutron driving device and the molding machine according to the first embodiment is different from the all-electric neutron driving device and the molding machine according to the first embodiment in that the neutron has a first inclined recess, and the fixed die has a second inclined member engageable with the first inclined recess.

[0106] Figs. 21 and 22 are views showing a state in which a modification example of the all-electric neutron driving device according to the first embodiment is fixed to a die. Fig. 21 is a view showing a state in which the die is open. Fig. 22 is a view showing a state in which the die is closed. Figs. 21 and 22 show a part of the die.

[0107] In the neutron 14 of the modification example 101, an inclined hole 14y (first inclined recess) is provided. In the fixed die 10, an inclined pin 10x (second inclined member) insertable into the inclined hole 14y is provided.

[0108] As shown in Fig. 22, in the state where the mold is closed, the core 14 is incorporated between the fixed mold 10 and the movable mold 12. In the state where the mold is closed, the inclined pin 10x of the fixed mold 10 is completely inserted into the inclined hole 14y of the core 14, and the core 14 is fixed to the fixed mold 10.

[0109] As described above, according to the first embodiment and its modification, the core has an inclined pin or an inclined hole, and by making it fully electric, it is possible to realize a fully electric core driving device and a molding machine that can achieve energy saving, miniaturization, suppression of deterioration of the working environment due to oil contamination, and shortening of the cycle time.

[0110] (Second Embodiment) The fully electric core driving device of the second embodiment further includes an elastic body. The rod has an annular flange provided on the side of the second cover member rather than the connecting portion. The elastic body is provided in the cylinder tube between the flange and the first cover member, which is different from the fully electric core driving device of the first embodiment. Further, the molding machine of the second embodiment is different from the molding machine of the first embodiment in that it includes the above fully electric core driving device. Hereinafter, for the content overlapping with the first embodiment, some descriptions may be omitted.

[0111] Fig. 23 is a schematic cross-sectional view of the fully electric core driving device of the second embodiment.

[0112] The fully electric core driving device 200 of the second embodiment includes a cylinder tube 40, a head cover 42 (first cover member), a cap cover 44 (second cover member), a rod 46, a nut 48, a screw shaft 50, a motor 52, a first pulley 54, a second pulley 56, a belt 58, a screw shaft guide 60, a control unit 62, and an elastic body 72.

[0113] The elastic body 72 is provided in the cylinder tube 40. The elastic body 72 is provided between the flange 46b of the rod 46 and the head cover 42 (first cover member). The elastic body 72 is provided between the rod 46 and the cylinder tube 40. The elastic body 72 is provided around the rod 46.

[0114] The elastic body 72 is, for example, a coil spring.

[0115] FIG. 24 is an explanatory diagram of the operation of the all-electric core driving device according to the second embodiment.

[0116] When the motor 52 is driven as shown in FIG. 24 from the state where the rod 46 shown in FIG. 23 is in the retracted limit position, the motor shaft 52a rotates and the second pulley 56 rotates. The rotation of the second pulley 56 is transmitted to the first pulley 54 by the belt 58, and the first pulley 54 rotates. When the first pulley 54 rotates, the screw shaft 50 rotates.

[0117] The rotational movement of the screw shaft 50 is converted into the linear movement of the rod 46 fixed to the nut 48. The rod 46 moves forward toward the head cover 42 side.

[0118] When the rod 46 moves forward toward the head cover 42 side, the elastic body 72 is compressed in the extending direction of the rod 46.

[0119] For example, as shown in FIG. 17 of the first embodiment, when the movable mold 12 is moved in the mold opening direction using the mold clamping device 16, when the inclined pin 14x is pulled out from the inclined hole 10y, the core 14 also moves upward, and the die-cast product 70 separates from the core 14. When the inclined pin 14x is pulled out from the inclined hole 10y, a force that moves the core 14 upward acts, and it becomes possible to pull the core 14 away from the die-cast product 70.

[0120] In the all-electric core driving device 200 according to the second embodiment, when the inclined pin 14x is pulled out from the inclined hole 10y, the restoring force of the compressed elastic body 72 also acts as a force that moves the core 14 upward. Therefore, for example, the frictional force between the inclined pin 14x and the inclined hole 10y is reduced. Also, for example, the stress applied to the inclined pin 14x is reduced. Thus, the component life of the inclined pin 14x is extended, and the reliability of the all-electric core driving device 200 and the die-casting machine 1000 is improved.

[0121] According to the second embodiment above, similar to the first embodiment, the ejector has an inclined pin or an inclined hole, and by making it fully electric, a fully electric ejector drive device and a molding machine that can achieve energy savings, miniaturization, suppression of deterioration of the working environment due to oil contamination, and shortening of the cycle time can be realized. Further, by providing an elastic body, a fully electric ejector drive device and a molding machine with a longer component life and improved reliability can be realized.

[0122] (Third Embodiment) The fully electric ejector drive device of the third embodiment further includes an elastic body and a support portion. The support portion is fixed to a part of the rod outside the cylinder tube, and the elastic body can be disposed between the support portion and the movable mold, which is different from the fully electric ejector drive device of the first embodiment. Further, the molding machine of the third embodiment is different from the molding machine of the first embodiment in that it includes the above-mentioned fully electric ejector drive device. Hereinafter, descriptions of parts overlapping with the first embodiment may be partially omitted.

[0123] FIGS. 25 and 26 are views showing a state in which the fully electric ejector drive device of the third embodiment is fixed to a mold. FIG. 25 is a view showing a state in which the mold is open. FIG. 26 is a view showing a state in which the mold is closed. FIGS. 25 and 26 show a part of the mold.

[0124] The fully electric ejector drive device 300 of the third embodiment has an elastic body 72 and a support portion 74.

[0125] The mold includes a fixed mold 10, a movable mold 12, and an ejector 14. The ejector 14 is fixed to the fully electric ejector drive device 300. A fixing jig 66 for fixing the ejector 14 is screwed to the coupling 46a. The ejector 14 and the fixing jig 66 can also be regarded as a part of the fully electric ejector drive device 300.

[0126] The fully electric ejector drive device 300 is fixed to the movable mold 12, for example, by a fixed base 64.

[0127] The support portion 74 is fixed to a part of the rod 46 outside the cylinder tube 40. The support portion 74 is fixed to, for example, the coupling 46a.

[0128] The elastic body 72 can be disposed between the support portion 74 and the movable mold 12. The elastic body 72 is disposed between the support portion 74 and the movable mold 12. The elastic body 72 is, for example, a coil spring.

[0129] As shown in FIG. 26, in the state where the mold is closed, the elastic body 72 is compressed in the extending direction of the rod 46.

[0130] For example, as shown in FIG. 17 of the first embodiment, when the movable mold 12 is moved in the mold opening direction using the mold clamping device 16, when the inclined pin 14x is pulled out from the inclined hole 10y, the core 14 also moves upward, and the die-cast product 70 separates from the core 14. When the inclined pin 14x is pulled out from the inclined hole 10y, a force that moves the core 14 upward acts, making it possible to pull the core 14 away from the die-cast product 70.

[0131] In the all-electric core driving device 300 of the third embodiment, when the inclined pin 14x is pulled out from the inclined hole 10y, the restoring force of the compressed elastic body 72 also acts as a force that moves the core 14 upward. Therefore, for example, the frictional force between the inclined pin 14x and the inclined hole 10y is reduced. Also, for example, the stress applied to the inclined pin 14x is reduced. Thus, the component life of the inclined pin 14x is extended, and the reliability of the all-electric core driving device 300 and the die-casting machine 1000 is improved.

[0132] As described above, according to the third embodiment, similar to the first embodiment, the core has an inclined pin or an inclined hole, and by being all-electric, an all-electric core driving device and a molding machine can be realized that achieve energy saving, miniaturization, suppression of deterioration of the working environment due to oil contamination, and shortening of the cycle time. Also, an all-electric core driving device and a molding machine with an extended component life and improved reliability can be realized.

[0133] The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In the embodiments, in the fully automatic neutron drive device, the molding machine, etc., descriptions of parts not directly necessary for the description of the present invention have been omitted, but elements related to the fully automatic neutron drive device, the molding machine, etc. that are required can be appropriately selected and used.

[0134] In the first to third embodiments, the case where the motor 52 is a servo motor has been described as an example, but the motor 52 is not limited to a servo motor. For example, the motor 52 may be an AC motor.

[0135] In the first to third embodiments, the first pulley 54, the second pulley 56, and the belt 58 are used as a transmission mechanism for transmitting the rotation of the motor 52 to the screw shaft 50. However, the transmission mechanism is not limited to this configuration. For example, a configuration may be adopted in which the rotation of the motor 52 is directly transmitted to the screw shaft 50. Also, for example, a combination of a plurality of gears may be used as the transmission mechanism.

[0136] In the first to third embodiments, the case where the shape of the first inclined member or the second inclined member is a pin shape has been described as an example, but the shape of the first inclined member or the second inclined member is not limited to a pin shape. The shape of the first inclined member or the second inclined member may be, for example, a block shape.

[0137] In the first to third embodiments, the case where the molding machine is a die-casting machine has been described as an example, but the molding machine may be, for example, an injection molding machine for manufacturing plastic products.

[0138] In addition, all fully automatic neutron drive devices and molding machines that include the elements of the present invention and can be appropriately designed and modified by those skilled in the art are included in the scope of the present invention. The scope of the present invention is defined by the scope of the claims and the scope of their equivalents.

Explanation of Reference Numerals

[0139] 10 Fixed Mold 10x Inclined Pin (Second Inclined Member) 10y Inclined Hole (Second Inclined Recess) 12 Movable Mold 14 Core 14x Inclined Pin (First Inclined Member) 14y Inclined Hole (First Inclined Recess) 16 Mold Clamping Device 18 Extrusion Device 20 Injection Device 22 Control Device 24 Hydraulic Circuit 26 Base 28 Fixed Die Plate 30 Movable Die Plate 32 Link Housing 34 Tie Bar 40 Cylinder Tube 42 Head Cover (First Cover Member) 44 Cap Cover (Second Cover Member) 46 Rod 46a Coupling (Connecting Portion) 46b Flange 48 Nut 50 Screw Shaft 52 Motor 52a Motor Shaft 54 First Pulley 56 Second Pulley 58 Belt 60 Screw Shaft Guide 62 Control Unit 64 Fixed Table 66 Fixed Fixture 68 Molten Metal (Molten Material) 70 Die Casting Part 72 Elastic Body 74 Support Portion 100 All - Electric Core Driving Device 200 All - Electric Core Driving Device 300 All - Electric Core Driving Device 1000 Die Casting Machine (Molding Machine) Ca Cavity

Claims

1. a cylinder tube, a first cover member fixed to one end of the cylinder tube, a second cover member fixed to the other end of the cylinder tube, a rod having a connecting portion at one end that can be connected to a core having at least a part provided in the cylinder tube and having a first inclined member or a first inclined concave portion, passing through the first cover member, and capable of linear movement with respect to the cylinder tube, a nut fixed to the rod, a screw shaft provided so as to be insertable into the rod, passing through the second cover member and the nut, and capable of rotational movement, a motor for rotating the screw shaft, a control unit for controlling the motor, and comprising, the control unit moves the rod in a direction protruding from the first cover member by driving the motor to apply torque to the screw shaft, the control unit stops the movement of the rod at a position where the first inclined member can engage with a second inclined concave portion provided in the fixed die, or at a position where the first inclined concave portion can engage with a second inclined member provided in the fixed die, the control unit releases the torque applied to the screw shaft after the movement of the rod is stopped, after a part of the first inclined member is inserted into the second inclined concave portion, or after a part of the second inclined member is inserted into the first inclined concave portion, characterized in that it is an all-electric core driving device.

2. further comprising an elastic body, the rod has an annular flange provided on the side of the second cover member rather than the connecting portion, and the elastic body is provided in the cylinder tube between the flange and the first cover member, characterized in that it is the all-electric core driving device according to Claim 1.

3. A cylinder tube, a first cover member fixed to one end of the cylinder tube, a second cover member fixed to the other end of the cylinder tube, a rod having a connecting portion at one end that can be connected to a core having at least a part provided in the cylinder tube and having a first inclined member or a first inclined concave portion, passing through the first cover member, and capable of linear movement with respect to the cylinder tube, a nut fixed to the rod, a screw shaft provided so as to be insertable into the rod, passing through the second cover member and the nut, and capable of rotational movement, a motor for rotating the screw shaft, an elastic body, a support portion, and comprising The support part is fixed to a part of the rod outside the cylinder tube, and the elastic body can be arranged between the support part and the movable die. The all-electric core driving device is characterized in that.

4. A base, A core having a first inclined member or a first inclined recess, A fixed die having a second inclined recess engageable with the first inclined member, or a second inclined member engageable with the first inclined recess, A movable die, A fixed die plate fixed on the base and holding the fixed die, A movable die plate provided movably in the mold opening and closing direction on the base and holding the movable die opposite to the fixed die, An all-electric core driving device that drives the core and is fixed to the movable die plate, A mold clamping device that clamps the fixed die and the movable die, An injection device that fills a molten material into a cavity formed by the fixed die, the movable die, and the core. The molding machine is provided with, The all-electric core driving device is, A cylinder tube, A first cover member fixed to one end of the cylinder tube, A second cover member fixed to the other end of the cylinder tube, A rod having a connecting portion at least partially provided in the cylinder tube and connectable to the core at one end, passing through the first cover member, and capable of linear movement with respect to the cylinder tube, A nut fixed to the rod, A screw shaft provided through the second cover member and the nut and insertable into the rod, capable of rotational movement, A motor that rotates the screw shaft, A control unit that controls the motor, Is provided with, The control unit drives the motor to apply torque to the screw shaft to move the rod in a direction protruding from the first cover member, The control unit stops the movement of the rod at a position where the first inclined member can engage with the second inclined recess, or where the first inclined recess can engage with the second inclined member, After the control unit stops the movement of the rod, after a part of the first inclined member is inserted into the second inclined recess, or after a part of the second inclined member is inserted into the first inclined recess, the molding machine is characterized in that the torque applied to the screw shaft is released.

5. The all-electric core driving device further includes an elastic body. The rod has an annular flange provided on the side of the second cover member with respect to the connecting portion, and the elastic body is provided in the cylinder tube between the flange and the first cover member. The molding machine according to claim 4, characterized in that.

6. A base, A core having a first inclined member or a first inclined concave portion, A fixed die having a second inclined concave portion engageable with the first inclined member, or a second inclined member engageable with the first inclined concave portion, A movable die, A fixed die plate fixed on the base and holding the fixed die, A movable die plate movably provided on the base in the mold opening and closing direction and holding the movable die facing the fixed die, An all-electric core driving device that drives the core and is fixed to the movable die plate, A mold clamping device for clamping the fixed die and the movable die, An injection device for filling a molten material into a cavity formed by the fixed die, the movable die, and the core, The all-electric core driving device, A cylinder tube, A first cover member fixed to one end of the cylinder tube, A second cover member fixed to the other end of the cylinder tube, A rod having a connecting portion at least partially provided in the cylinder tube and connectable to the core at one end, passing through the first cover member, and capable of linear movement with respect to the cylinder tube, A nut fixed to the rod, A screw shaft passing through the second cover member and the nut and insertable into the rod and capable of rotational movement, A motor for rotating the screw shaft, An elastic body, A support portion, The support portion is fixed to a part of the rod outside the cylinder tube, and the elastic body is disposed between the support portion and the movable die. The molding machine is characterized in that.

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