WO2022097712A1 - 押出装置及び成形機 - Google Patents

押出装置及び成形機 Download PDF

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Publication number
WO2022097712A1
WO2022097712A1 PCT/JP2021/040742 JP2021040742W WO2022097712A1 WO 2022097712 A1 WO2022097712 A1 WO 2022097712A1 JP 2021040742 W JP2021040742 W JP 2021040742W WO 2022097712 A1 WO2022097712 A1 WO 2022097712A1
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WO
WIPO (PCT)
Prior art keywords
mold
drive unit
extrusion
die plate
hydraulic
Prior art date
Application number
PCT/JP2021/040742
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
眞 辻
俊昭 豊島
良英 田畠
三郎 野田
Original Assignee
芝浦機械株式会社
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
Application filed by 芝浦機械株式会社 filed Critical 芝浦機械株式会社
Priority to MX2023005163A priority Critical patent/MX2023005163A/es
Priority to CN202180068752.XA priority patent/CN116323142A/zh
Publication of WO2022097712A1 publication Critical patent/WO2022097712A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • 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
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations

Definitions

  • the molding machine is, for example, a die casting machine or an injection molding machine.
  • a molding machine that coagulates a molding material in a mold to produce a molded product includes a fixed mold and a mobile mold driven in the mold opening / closing direction (directions approaching and separating from the fixed mold).
  • the mold moves to the side of the fixed mold and the two come into contact with each other, a cavity is formed between the two, in which the molding material before solidification (for example, in a molten state) is filled.
  • the molded material in the cavity is solidified and then the mobile mold is moved to the opposite side of the fixed mold, the solidified molding material (molded article) is separated from the fixed mold, for example, and remains in the mobile mold.
  • the molded product remaining in the mobile mold is, for example, pushed toward the fixed mold by an extrusion pin inserted in the mold opening / closing direction in the mobile mold, and is separated from the mobile mold.
  • the extruder of Patent Document 1 has the following configuration. Multiple extrusion pins that are inserted into the movable mold in the mold opening / closing direction and inserted into the moving die plate that holds the mobile mold in the mold opening / closing direction. An extrusion plate located behind a moving die plate (opposite the mobile die plate) and secured to multiple extrusion pins. An electric drive unit and a hydraulic drive unit that drive the extrusion plate in the mold opening / closing direction with respect to the moving die plate.
  • the extruder of Patent Document 2 has the following configuration. Multiple extrusion pins that are inserted into the movable mold in the mold opening / closing direction. An extrusion plate that is located behind the movable mold (opposite the fixed mold) and has multiple extrusion pins that are movably inserted in the mold opening / closing direction. Multiple cylinder units that are supported by the extrusion plate and can drive multiple extrusion pins in the mold opening / closing direction with respect to the extrusion plate. A cylinder unit different from the above-mentioned multiple cylinder units that can drive the extrusion plate in the mold opening / closing direction with respect to the movable mold.
  • the extruder of Patent Document 3 has the following configuration. Multiple extrusion pins that are inserted into the movable mold in the mold opening / closing direction. Extruded plate located between the mobile die plate and the mobile die plate. Multiple electric drive units that are supported by the extrusion plate and drive multiple extrusion pins with respect to the extrusion plate. A hydraulic drive unit that is supported by the moving die plate and drives the extrusion plate with respect to the moving die plate.
  • the various configurations proposed for the extruder have their own strengths and weaknesses, respectively.
  • the performance required for the extruder also varies depending on the user, the type of molding machine, and the like.
  • the known configuration may not always be optimal for the user, the type of molding machine, or the like. Therefore, it is hoped that a new configuration will be proposed as the configuration of the extruder and that the technology will be enriched.
  • the extrusion device drives an extrusion pin inserted in one of a fixed type and a mobile type in the mold opening / closing direction.
  • the extruder has a hydraulic drive unit and an electric drive unit.
  • the hydraulic drive unit drives the extrusion plate with respect to the die plate holding the one mold.
  • the extrusion plate is fixed to the extrusion pin and is located in a space composed of a die base of one of the molds.
  • the electric drive unit drives the extrusion plate with respect to the die plate.
  • the molding machine includes the above-mentioned extruder.
  • a new extruder and molding machine for driving an extruder located in a space composed of a die base by a hydraulic drive unit and an electric drive unit are provided, and the technology is enriched. It is planned.
  • FIG. 2 is a cross-sectional view showing the configuration of a core device of the die casting machine of FIG.
  • FIG. 6 is a cross-sectional view showing a configuration of a core device in a state different from that of FIG.
  • FIG. 6 is a cross-sectional view showing a configuration of a core device in a state different from that of FIGS. 4 and 5.
  • FIG. 7A is a circuit diagram showing the configuration of a main part of the hydraulic pressure device of the die casting machine of FIG. 1
  • FIG. 7B is a circuit diagram showing the configuration of the main part of the hydraulic pressure device according to the modified example.
  • 8 (a) and 8 (b) are diagrams illustrating an operation related to extrusion of the die casting machine of FIG. 1.
  • 9 (a) and 9 (b) are diagrams showing the continuation of FIG. 8 (b).
  • the top view which shows the structure of the moving die plate of the die casting machine which concerns on 2nd Embodiment and the periphery thereof.
  • 12 (a) and 12 (b) are diagrams illustrating an operation related to extrusion of the die casting machine of FIG. 1.
  • 13 (a) and 13 (b) are views showing the continuation of FIG. 12 (b).
  • FIG. 1 is a side view showing a configuration of a main part of the die casting machine 1 according to the first embodiment, including a cross-sectional view in part.
  • FIG. 1 or another drawing including a cross section in part for convenience, two or more cross sections that are not necessarily located in the same plane may be shown together.
  • the vertical direction of the paper surface in FIG. 1 is, for example, a vertical direction.
  • the die casting machine 1 is, for example, a device for manufacturing a product (molded product, die casting product) made of solidified molding material by injecting (filling) a molten molding material into the inside (cavity 107) of the mold 101. It is configured.
  • a part of the inner surface of the cavity 107 (a part composed of the mobile type 105 described later) is shown by a two-dot chain line.
  • the molding material is, for example, a metal such as aluminum.
  • the molten metal is sometimes called a molten metal.
  • the molding material in the solid-liquid coexisting state (semi-solidified state or semi-melted state) may be injected into the cavity 107.
  • the mold 101 has, for example, a fixed mold 103 and a moving mold 105 facing the fixed mold 103.
  • the cross section of the fixed mold 103 or the mobile mold 105 is shown by one type of hatching. However, these molds may be directly carved or nested.
  • the fixed type 103 is a type that does not move.
  • the mobile type 105 is a type that moves in the direction opposite to the fixed type 103, and can move between the position indicated by the solid line and the position indicated by the alternate long and short dash line.
  • the opposite direction of the fixed type 103 and the mobile type 105 is, for example, a horizontal direction.
  • the mold closing is performed so that the mobile mold 105 is brought close to the fixed mold 103.
  • Mold closing is generally completed by mold contact (contact of mobile 105 with fixed mold 103).
  • mold contact By mold contact, a cavity 107 is formed between the fixed mold 103 and the mobile mold 105.
  • a force (mold clamping force) for tightening the fixed mold 103 and the moving mold 105 in the opposite direction is applied to the mold 101.
  • the molding material is injected into the cavity 107.
  • the mold 101 is given a pressure in the direction of opening the mold 101 from the molten metal injected into the cavity 107. However, since the mold clamping force is applied, the mold 101 is maintained in the closed state.
  • the molding material injected into the cavity 107 solidifies into a molded product.
  • the mold opening direction the direction opposite to the fixed mold 103 with respect to the mobile mold 105; the same applies hereinafter
  • the mold opening that separates the mobile mold 105 from the fixed mold 103 is opened. Will be done.
  • the molded product can be taken out.
  • the combination of the mold closing direction and the mold opening direction may be referred to as a mold opening / closing direction.
  • the molded product When the mold is opened to take out the molded product, the molded product separates from one mold of the fixed mold 103 or the mobile mold 105 and remains in the other mold. After that, the molded product is extruded from the other mold to the side of the one mold by an extrusion pin (described later) inserted into the other mold.
  • the shape of the mobile mold 105 and the fixed mold 103 determines whether the molded product remains in the fixed mold 103 or the fixed mold 105 when the mold is opened. In the die casting machine 1 according to the present embodiment, it is assumed that the molded product remains in the mobile mold 105 due to the mold opening.
  • the mold 101 may include a core 109 (movable core).
  • the core 109 is movable in a direction (for example, in the vertical direction in the illustrated example) intersecting (for example, orthogonal to) the mold opening / closing direction.
  • the core 109 moves in the direction between the fixed mold 103 and the mobile mold 105 before or in parallel with the mold closing, and by extension, a part of the core 109 is located in the cavity 107. Further, the core 109 moves in a direction of retracting from between the fixed mold 103 and the mobile mold 105 in parallel with the mold opening, or after the mold opening and before the extrusion of the molded product, and eventually from the molded product. It is pulled out.
  • a core 109 for example, a recess or a through hole that opens in a direction intersecting the mold opening / closing direction is formed in the molded product.
  • the die casting machine 1 has a machine main body 3 that performs mechanical operation and a control device 5 that controls the machine main body 3.
  • the machine body 3 has, for example, the following devices.
  • a mold clamping device 7 that opens and closes the mold 101 and clamps the mold.
  • An injection device 9 for injecting molten metal into the cavity 107.
  • An extruder 11 that extrudes a molded product formed by solidifying the molten metal from the mobile 105.
  • the core device 13 that drives the core 109.
  • the configuration and operation of the machine body 3 may be various configurations and operations including known configurations and operations, except for the configuration and operation of the extruder 11.
  • a novel configuration and / or operation may be exemplified with respect to a configuration and operation which may be a known configuration and operation.
  • a novel configuration and operation of the core device 13 will be exemplified.
  • a novel configuration (particularly its arrangement) of the hydraulic pressure device for supplying the hydraulic fluid (for example, oil) to the extruder 11 and / or the core device 13 is exemplified.
  • the configuration of the mold clamping device 7, the configuration of the injection device 9, and the configuration of the control device 5 will be illustrated.
  • the configuration of the extruder 11 will be described.
  • the configuration of the new core device 13 will be described.
  • the configuration of the hydraulic pressure device that supplies the hydraulic fluid to the extruder 11 and the core device 13 will be described.
  • the operation of extruding the molded product by the mold clamping device 7 and the extrusion device 11 will be described.
  • the description of the configuration and operation which may be the same as the known configuration and operation will be omitted as appropriate.
  • the configuration shared by the extrusion device 11 and other devices is regarded as a part of the die casting machine 1. Alternatively, it may be regarded as a part of the extruder 11.
  • the mold clamping device 7 includes, for example, a base 14, a fixed die plate 15 and a moving die plate 17 facing each other on the base 14, and one or more (usually a plurality of, for example) spanned over the two die plates. It has four) tie bars 19.
  • the fixed die plate 15 is fixed to the base 14 and holds the fixed die 103 on the surface facing the moving die plate 17.
  • the moving die plate 17 is movable on the base 14 in the direction facing the fixed die plate 15 (mold opening / closing direction), and holds the moving die 105 on the surface facing the fixed die plate 15.
  • the tie bar 19 is fixed to one die plate (fixed die plate 15 in the illustrated example) of the fixed die plate 15 and the moving die plate 17 at least at the time of mold clamping, and the other die plate (in the illustrated example). It is inserted so as to be relatively movable in the axial direction with respect to the moving die plate 17).
  • the mold 101 is opened and closed by moving the moving die plate 17 in the mold opening and closing direction.
  • the portion on the side of the other die plate (moving die plate 17) is the same as the one die plate with respect to the other die plate. Is pulled to the opposite side (on the left side of the paper in the example shown). As a result, a mold clamping force corresponding to the amount of extension of the tie bar 19 can be obtained.
  • the drive unit of the mold clamping device 7 for realizing the mold opening / closing and mold clamping as described above may have various configurations.
  • an electric and toggle type mold clamping drive unit 21 is exemplified.
  • the mold clamping drive unit 21 is connected to, for example, a link housing 23 located behind the moving die plate 17 (on the side opposite to the fixed die plate 15) on the base 14, and the link housing 23 and the moving die plate 17. It has a link mechanism 25 and a mold clamping electric motor 27 that applies a driving force to the link mechanism 25.
  • a hydraulic cylinder for example, a hydraulic cylinder that applies a driving force to the link mechanism 25 may be provided. That is, the drive unit of the toggle type (or other type) mold clamping device 7 may be a hydraulic type or a hybrid type in which an electric type and a hydraulic type are combined.
  • the drive unit of the mold clamping device 7 may be a type other than the toggle type.
  • the mold clamping device may have a drive unit for opening and closing the mold and a drive unit for mold clamping separately.
  • the drive unit for opening and closing the mold may be, for example, a hydraulic cylinder, or has a rotary motor and a conversion mechanism (for example, a screw mechanism) that converts the rotation of the motor into linear motion. It may be assumed.
  • the mold clamping drive unit may be, for example, a mold clamping cylinder having a piston fixed to the tie bar 19.
  • the injection device 9 has, for example, a sleeve 35 leading to the inside of the mold 101, a plunger 37 slidable in the sleeve 35, and an injection drive unit 39 for driving the plunger 37.
  • the plunger 37 moves toward the mold 101, so that the molding material is extruded (injected) into the mold 101. Since the sleeve 35 and the plunger 37 can be regarded as consumables, only the injection drive unit 39 may be regarded as an injection device.
  • the injection device 9 corresponds to a so-called cold chamber machine. That is, the molding material is supplied into the sleeve 35 from the supply port 35a opened on the upper surface of the sleeve 35 by a supply device (hot water supply device) (not shown).
  • a supply device hot water supply device
  • the injection device 9 may be configured to correspond to a so-called hot chamber machine.
  • the injection drive unit 39 may be a hydraulic type (for example, hydraulic type), an electric type, or a hybrid type in which a hydraulic type and an electric type are combined.
  • the control device 5 may be configured to include, for example, a computer, although not particularly shown.
  • the computer may be configured to include, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and an external storage device, although not particularly shown.
  • a CPU Central Processing Unit
  • ROM Read Only Memory
  • RAM Random Access Memory
  • an external storage device although not particularly shown.
  • the control device 5 may include a logic circuit that executes a certain operation, may include a power supply circuit, or may be conceptualized including a driver.
  • the control device 5 may be integrated in one place in terms of hardware, or may be distributed in a plurality of places.
  • the series of operations (molding cycle) described above for manufacturing a molded product is repeatedly performed.
  • the molding cycle includes mold opening / closing and mold clamping by the mold clamping device 7, injection by the injection device 9, extrusion by the extrusion device 11, and insertion / removal of the core by the core device 13.
  • the operation of the die casting machine 1 described in the present embodiment may be interpreted as being controlled by the control device 5 unless otherwise specified and unless it is peculiar in the light of common general technical knowledge.
  • FIG. 2 is a schematic diagram showing a configuration of a main part of the mold 101 and its surroundings.
  • the schematic view is a side view including a cross-sectional view in part.
  • FIG. 3 is a schematic diagram showing a configuration of a main part of the moving die plate 17 and its surroundings.
  • the schematic view is a top view including a cross-sectional view in part.
  • the mobile 105 has a die base 105a (in the present disclosure, the die base 105a is referred to as being a part of the mobile 105).
  • the die base 105a contributes to the attachment of the mobile type 105 to the moving die plate 17, and also contributes to forming a space 105s for accommodating a part of the extruder 11.
  • the configuration of the die base 105a may be various configurations including known configurations.
  • the die base 105a is generally configured in a hollow rectangular parallelepiped shape, and the side of the main body (right side of the paper surface) of the movable type 105 is open.
  • the surface of the space 105s on the moving die plate 17 side may be formed by a part of the moving die plate 105 as shown in the figure, or may be formed by a part of the moving die plate 17 unlike the drawing. ..
  • the extruder 11 has, for example, the following configuration. Multiple extrusion pins 41 for pushing the part. Extrusion plate 43 for holding a plurality of extrusion pins 41. A plurality of guide pins 45 for guiding the extrusion plate 43 when the extrusion pin 41 is moved. A plurality of extrusion rods 47 connected to the extrusion plate 43 in order to transmit a driving force to the extrusion pin 41 via the extrusion plate 43. A movable member 49 connected to the extrusion rod 47 in order to transmit a driving force to the extrusion rod 47. A hydraulic drive unit 51 and an electric drive unit 61 (FIG. 3) that generate a driving force for driving the extrusion pin 41 and apply the driving force to the movable member 49.
  • the extruder 11 is a hybrid type that combines an electric type and a hydraulic type. Since some of the above components (for example, the extrusion pin 41 and the extrusion plate 43) are replaced with the replacement of the mold 101, even if the extrusion device 11 is defined except for some of the components. good.
  • the extrusion pin 41 is, for example, a shaft-shaped member having a flange portion at the rear end.
  • the extrusion pin 41 is inserted in the mold opening / closing direction with respect to the movable mold 105 (more strictly, a portion on the right side of the paper surface with respect to the die base 105a), and is relatively movable in the insertion direction with respect to the mobile mold 105.
  • the plurality of extrusion pins 41 may be provided at appropriate positions and numbers according to the shape in the mold 101 (the shape of the space including not only the cavity 107 but also the runner and the like). In theory, the number of extrusion pins 41 can be one.
  • the extrusion pin 41 is arranged so that, for example, when the molding material is injected into the cavity 107, its tip surface coincides with the inner surface constituting the cavity 107 of the mobile type 105. Then, when the molding material is solidified and the mold is opened, it is driven toward the fixed mold 103 so as to protrude from the inner surface of the mobile mold 105. As a result, the molded product is extruded.
  • the extrusion pin 41 may be located inside the inner surface of the mobile type 105 when the molding material is injected into the cavity 107. Then, the extrusion pin 41 may contribute to the local pressurization of the molding material like a squeeze pin by being driven toward the cavity 107 in the process of solidifying the molding material.
  • the extrusion pin 41 may be driven with a full stroke, for example. That is, when the molding material is ejected, the extrusion pin 41 may be located in the recess limit (drive limit in the mold opening direction), and when the molded product is extruded, the extrusion pin 41 is in the forward limit (drive in the mold closing direction). It may be driven up to the limit).
  • the drive limit is a position where movement is physically restricted (hereinafter, the same applies unless otherwise specified). However, the extrusion pin 41 does not have to be driven at full stroke.
  • the drive limit of the extrusion pin 41 may be appropriately defined, and may be defined by the drive limit of the extrusion plate 43, the piston rod 59 (piston 57) and / or the electric drive unit 61, as described later.
  • the extruded plate 43 has, for example, a front side plate 43a and a rear side plate 43b that is vertically overlapped and fixed to the front side plate 43a.
  • the extrusion pin 41 is fixed to the extrusion plate 43, for example, by being inserted into the front side plate 43a and having a flange portion provided at the rear end sandwiched between the front side plate 43a and the rear side plate 43b.
  • the extruded plate 43 may further have a plate (not shown) that overlaps the rear plate 43b and is fixed to the extruded rod 47 on the side opposite to the front plate 43a of the rear plate 43b.
  • the extrusion plate 43 is housed in the space 105s of the mobile type 105. Since the plurality of extrusion pins 41 are commonly fixed to the extrusion plate 43, they both move relative to the moving mold 105 as the extrusion plate 43 moves relative to the moving mold 105.
  • the extrusion plate 43 is driven in the mold closing direction by abutting against an appropriate stopper (for example, the surface on the right side of the paper surface of the inner surface constituting the space 105s of the mobile mold 105) that is immovable with respect to the mobile mold 105.
  • Limits may be specified. This drive limit may or may not define the advance limit of the extrusion pin 41.
  • the extrusion plate 43 has a drive limit in the mold opening direction due to contact with an appropriate stopper (for example, the surface of the moving die plate 17 on the side of the moving mold 105) that is immovable with respect to the moving mold 105. May be specified. This drive limit may or may not define the recess limit of the extrusion pin 41.
  • the guide pin 45 has substantially the same configuration as the extrusion pin 41 except for its arrangement position and specific dimensions. That is, the approximate shape of the guide pin 45 is a shaft shape having a flange portion at the rear end.
  • the guide pin 45 is inserted in the mold opening / closing direction with respect to the movable mold 105 (a portion on the front side of the die base 105a), and is relatively movable in the insertion direction with respect to the mobile mold 105. Further, the guide pin 45 has a flange portion at the rear end fixed to the extrusion plate 43 in the same manner as the extrusion pin 41, for example.
  • the plurality of guide pins 45 are located outside the cavity 107 when viewed in the mold opening / closing direction. The positions and the number of the plurality of guide pins 45 may be appropriately set.
  • the guide pins 45 are located at the four corners of the movable type 105. In theory, the guide pin 45 can be omitted, and can be one.
  • the extrusion rod 47 is inserted through the moving die plate 17 in the mold opening / closing direction, and can move in the mold opening / closing direction with respect to the moving die plate 17.
  • the tip of the extrusion rod 47 (the end on the right side of the paper) is fixed to the extrusion plate 43. Therefore, the extrusion plate 43 can be moved in the front-rear direction by applying an axial driving force to the extrusion rod 47.
  • the plurality of extrusion rods 47 may be provided at appropriate positions and numbers according to the shape and size of the extrusion plate 43 and the like.
  • the extrusion rods 47 are located at the four corners of the extrusion plate 43. In theory, the number of extrusion rods 47 may be one.
  • the method of fixing the extrusion rod 47 and the extrusion plate 43 may be various methods including known methods.
  • the movable member 49 is arranged so as to face the back surface of the moving die plate 17 (the side opposite to the fixed die plate 15) and is connected to the extrusion rod 47. Therefore, the extrusion rod 47 can be moved in the mold opening / closing direction by applying a driving force in the mold opening / closing direction to the movable member 49.
  • the shape and dimensions of the movable member 49 may be appropriately set according to the connection mode with the hydraulic drive unit 51 and the electric drive unit 61 and the like.
  • the movable member 49 has a substantially flat plate shape and, as shown in FIG. 3, has a width wider than the width of the moving die plate 17.
  • the method of fixing the movable member 49 and the extrusion rod 47 may be various methods including known methods.
  • the movable member 49 may be supported by a guide 53 that guides the movable member 49 in the mold opening / closing direction.
  • the guide 53 is fixed to the moving die plate 17, for example, and has an axial shape extending in the mold opening direction (the side opposite to the moving mold 105).
  • the movable member 49 is allowed to move only in the mold opening / closing direction by inserting the guide 53, and the load thereof is supported.
  • the extrusion rod 47 may support and guide the movable member 49.
  • the movable member 49 may be supported by a guide provided on the base 14. From another point of view, the guide 53 is optional.
  • the number and arrangement of guides 53 may be appropriately set.
  • four guides 53 are provided.
  • the four guides 53 are arranged symmetrically with a virtual plane parallel to the mold opening / closing direction and the vertical direction as a plane of symmetry.
  • the four guides 53 are arranged symmetrically with a virtual plane parallel to the mold opening / closing direction and the horizontal direction as a plane of symmetry.
  • the center of gravity of the movable member 49 and / or the center of the hydraulic pressure driving unit 51 for example, the piston rod 59 described later.
  • the axis of. Is located.
  • the number of guides 53 may be one, two, three, or five or more.
  • the number of guides 53 other than four may be arranged symmetrically in the same manner as described above.
  • the hydraulic pressure drive unit 51 has a hydraulic pressure cylinder.
  • the term of the hydraulic drive unit 51 may be used as a term to refer to this hydraulic cylinder (extrusion cylinder).
  • the hydraulic drive unit 51 has, for example, a cylinder member 55, a piston 57 that is axially slidable in the cylinder member 55, and a piston rod 59 that extends outward from the inside of the cylinder member 55. There is.
  • the inside of the cylinder member 55 is divided by the piston 57 into a rod side chamber 55r on the side where the piston rod 59 extends and a head side chamber 55h on the opposite side (divided into two cylinder chambers).
  • the piston 57 moves relative to the cylinder member 55 toward the other cylinder chamber.
  • the piston 57 moves relative to the cylinder member 55 toward the head side chamber 55h.
  • the hydraulic pressure drive unit 51 is different from the hydraulic cylinder of a general extruder, and the other of the two cylinder chambers (head side chamber 55h in the illustrated example) is open to the atmosphere. That is, the hydraulic pressure driving unit 51 is configured to generate a driving force only in one direction of the piston 57 (in the illustrated example, the direction from the rod side chamber 55r to the head side chamber 55h). As will be described later, in the present embodiment, the hydraulic pressure drive unit 51 is used only for moving the extrusion pin 41 toward the fixed mold 103 with respect to the movable mold 105, and for moving to the opposite side. Is not used, and the movement of the piston 57 in the other direction (direction from the head side chamber 55h to the rod side chamber 55r in the illustrated example) is performed by the driving force from the electric drive unit 61.
  • the cylinder member 55 does not have end faces on both sides in the axial direction on the side of the cylinder chamber (head side chamber 55h in the illustrated example) that is open to the atmosphere.
  • an opening (port) may be formed at an appropriate position.
  • the hydraulic pressure drive unit may be configured such that both of the two cylinder chambers are filled with the liquid, unlike the present embodiment.
  • both of the two cylinder chambers may be supplied with a hydraulic fluid (pressure applied) and used to drive the piston 57.
  • one cylinder chamber (head side chamber 55h in this embodiment) may be merely a substitute for a part or all of the tank.
  • the hydraulic fluid is stored in an amount that does not fill the cylinder chamber so that the piston 57 is lubricated. May be.
  • the hydraulic pressure drive unit 51 is different from the hydraulic cylinder of a general extruder, and the end portion of the cylinder member 55 on the rod side chamber 55r side is open and is closed by the movable member 49. That is, the hydraulic cylinder (from another viewpoint, the hydraulic drive unit 51) is configured to include a part of the movable member 49. However, the cylinder member 55 itself may have a portion that closes the end portion on the side of the rod side chamber 55r separately from the movable member 49.
  • the hydraulic pressure drive unit 51 is not fixed to the piston 57 and the piston rod 59. That is, the piston 57 and the piston rod 59 are allowed to move relative to each other in the axial direction. Further, when the piston 57 moves relative to one side in the axial direction with respect to the piston rod 59 and reaches a predetermined relative position, further relative movement to the one side with respect to the piston rod 59 is restricted.
  • the cylinder chamber (rod side chamber 55r in the illustrated example) to which the hydraulic fluid is supplied to move the extrusion pin 41 toward the fixed mold 103 with respect to the movable mold 105 to the remaining cylinder chamber (not shown). In the example, the direction is toward the head concubine 55h).
  • the former cylinder chamber may be referred to as a first cylinder chamber
  • the latter cylinder chamber may be referred to as a second cylinder chamber.
  • the piston rod 59 has a rod body 59a inserted in the axial direction with respect to the piston 57 and an engaging portion 59b fixed to the rod body 59a.
  • the rod body 59a is slidable in the axial direction with respect to the piston 57.
  • the engaging portion 59b is located in the second cylinder chamber (head side chamber 55h in the illustrated example) and engages with the piston 57 in the direction from the head side chamber 55h to the first cylinder chamber (rod side chamber 55r in the illustrated example). It is possible. Therefore, the relative movement between the piston 57 and the piston rod 59 is allowed in a state where the engaging portion 59b is not engaged. By engaging the engaging portion 59b with the piston 57, the relative movement of the piston 57 to the piston rod 59 toward the head concubine 55h is restricted.
  • the rod side chamber 55r is sealed.
  • packing such as an O-ring may be provided at an appropriate position.
  • packing may be interposed between the piston 57 and the cylinder member 55, between the piston 57 and the piston rod 59, and between the piston rod 59 and the movable member 49, respectively.
  • the piston 57 slides on the cylinder member 55, the two may not be in direct contact with each other due to the packing interposed between the two. The same applies to other members.
  • the hydraulic pressure drive unit 51 (hydraulic pressure cylinder) is arranged with the axial direction facing the mold opening / closing direction.
  • One member of the cylinder member 55 and the piston rod 59 (piston rod 59 in the illustrated example) is fixed to the moving die plate 17.
  • the other member (cylinder member 55 in the illustrated example) is fixed to the movable member 49. Therefore, due to the relative movement of the piston rod 59 with respect to the cylinder member 55 in one axial direction (hereinafter, the one side may be referred to as a first direction), the movable member 49 moves with respect to the moving die plate 17.
  • the extrusion pin 41 moves relative to the mold closing direction, and the extrusion pin 41 moves relative to the fixed mold 103 with respect to the moving mold 105.
  • the hydraulic pressure drive unit 51 is configured and arranged so that the direction from the first cylinder chamber (rod side chamber 55r in the illustrated example) to the second cylinder chamber (head side chamber 55h in the illustrated example) is the above-mentioned first direction. Will be done.
  • the direction from the first cylinder chamber to the second cylinder chamber is the direction in which the piston 57 engages with the piston rod 59 (engagement portion 59b) as described above. Therefore, when the hydraulic fluid is supplied to the first cylinder chamber, the piston 57 moves to the side of the second cylinder chamber, and eventually the piston rod 59 moves in the first direction. In this way, the extrusion pin 41 is driven toward the fixed mold 103 by the driving force of the hydraulic pressure driving unit 51.
  • the position and orientation of the hydraulic pressure drive unit 51 for realizing the above operation can be various.
  • the cylinder member 55 is arranged on the side opposite to the moving die plate 17 with respect to the movable member 49, and is fixed to the movable member 49.
  • the piston rod 59 extends from the cylinder member 55 toward the movable member 49 (in another viewpoint, the mold closing direction), penetrates the movable member 49, and is fixed to the moving die plate 17.
  • the hydraulic fluid is supplied to the rod side chamber 55r, and the piston 57 moves relative to the cylinder member 55 toward the head side chamber 55h (first direction).
  • the movable member 49 moves relative to the moving die plate 17 in the mold closing direction, and the extrusion pin 41 moves relative to the moving mold 105 toward the fixed mold 103.
  • the direction of the hydraulic pressure drive unit 51 (direction in the left-right direction on the paper surface) is the same as in the illustrated example, the cylinder member 55 is arranged on the moving die plate 17 side with respect to the movable member 49, and the cylinder member 55 is fixed to the movable member 49. Then, the piston rod 59 may be fixed to the moving die plate 17.
  • the right side of the paper surface of the rod side chamber 55r is closed by a portion of the cylinder member 55 itself instead of the movable member 49 (in another embodiment in which the movable member 49 cannot be used to seal the cylinder chamber filled with the hydraulic fluid).
  • the first direction in this embodiment is the same mold opening direction (left side of the paper) as in the illustrated example.
  • the piston rod 59 moves relative to the cylinder member 55 in the mold opening direction, so that the extrusion pin 41 moves relative to the fixed mold 103 with respect to the moving mold 105.
  • the hydraulic fluid is supplied to the rod side chamber 55r (first cylinder chamber) located on the right side of the paper surface with respect to the piston 57.
  • the engaging portion 59b of the piston rod 59 is located in the head side chamber 55h (second cylinder chamber) located on the left side of the paper surface with respect to the piston 57, as in the embodiment.
  • the direction of the hydraulic pressure drive unit 51 (direction in the left-right direction on the paper surface) is reversed from the illustrated example, the cylinder member 55 is arranged on the moving die plate 17 side with respect to the movable member 49, and the cylinder member 55 is placed on the moving die plate. It may be fixed to 17 and the piston rod 59 may be fixed to the movable member 49.
  • the first direction is the mold closing direction (on the right side of the paper), contrary to the illustrated example. That is, the piston rod 59 moves relative to the cylinder member 55 in the mold closing direction, so that the extrusion pin 41 moves relative to the fixed mold 103 with respect to the moving mold 105.
  • the hydraulic fluid is supplied to the rod side chamber 55r (first cylinder chamber) located on the left side of the paper surface (opposite to the illustrated example) with respect to the piston 57.
  • the engaging portion 59b of the piston rod 59 is located in the head side chamber 55h (second cylinder chamber) located on the right side of the paper surface (opposite to the illustrated example) with respect to the piston 57.
  • the direction of the hydraulic pressure drive unit 51 (direction in the left-right direction on the paper surface) is the same as in the illustrated example, the cylinder member 55 is arranged on the side opposite to the moving die plate 17 with respect to the movable member 49, and the cylinder member 55 is movable.
  • the piston rod 59 may be fixed to the movable member 49 by being fixed to the moving die plate 17 by a connecting member inserted through the member 49 or via the outside of the movable member 49.
  • the first direction is the mold closing direction (on the right side of the paper), contrary to the illustrated example. That is, the piston rod 59 moves relative to the cylinder member 55 in the mold closing direction, so that the extrusion pin 41 moves relative to the fixed mold 103 with respect to the moving mold 105.
  • the hydraulic fluid is supplied to the head side chamber 55h (first cylinder chamber) located on the left side of the paper surface with respect to the piston 57.
  • the rod side chamber 55r (second cylinder chamber) may be open to the atmosphere, unlike the embodiment.
  • the engaging portion 59b of the piston rod 59 is located in the rod side chamber 55r located on the right side of the paper surface with respect to the piston 57. From another viewpoint, the engaging portion 59b extends from the portion of the piston rod 59 that is inserted into the piston 57 and the cylinder member 55, rather than the end opposite to the side that extends from the cylinder member 55. It is located between the part where it is.
  • the arrangement and orientation of the hydraulic pressure drive unit 51 can be variously arranged and oriented as described above, but the following description is performed on the premise of the arrangement and orientation and the like of the hydraulic pressure drive unit 51 in the illustrated example for convenience. Sometimes.
  • the hydraulic drive unit 51 is a stopper (for example, a surface constituting the rod side chamber 55r of the movable member 49) that defines a drive limit toward the rod side chamber 55r with respect to the cylinder member 55 of the piston 57, and / or a cylinder member of the piston 57. It may or may not have a stopper (not shown) that defines a drive limit to the side of the head concubine 55h with respect to 55. If so, these drive limits may or may not define the forward or backward limits of the extrusion pin 41. In another aspect, the piston 57 may or may not be utilized at full stroke.
  • the extrusion pin 41 when the piston 57 is located in the drive limit toward the rod side chamber 55r, the extrusion pin 41 is located in the retract limit. Further, in the present embodiment, as can be understood from the description of the operation described later, since the relative movement between the piston 57 and the piston rod 59 is permitted, the advance limit of the extrusion pin 41 (to the side of the fixed mold 103). The drive limit) is not defined by the drive limit of the piston 57.
  • the stroke of the piston 57 is specified.
  • the stroke may be shorter than, for example, the stroke of the extrusion pin 41 (in another aspect, the stroke of the piston rod 59 and / or the stroke of the electric drive unit 61).
  • the former may be 1/2 or less, 1/5 or less, or 1/10 or less with respect to the latter.
  • the extruder 11 has, for example, two electric drive units 61.
  • the two electric drive units 61 are arranged symmetrically with a virtual plane parallel to the mold opening / closing direction and the vertical direction as a plane of symmetry, for example.
  • the center of gravity of the movable member 49 and / or the center of the hydraulic pressure driving unit 51 is located.
  • the positions of the two electric drive units 61 are located at the same height as the center of.
  • the connection positions of the two electric drive units 61 with respect to the movable member 49 are point-symmetrical with respect to the connection positions of the hydraulic pressure drive unit 51 with respect to the movable member 49 when viewed in the mold opening / closing direction.
  • the configurations of the two electric drive units 61 are, for example, the same.
  • the description of the electric drive unit 61 described below may be regarded as the description of any of the electric drive units 61 unless otherwise specified and there is no contradiction or the like.
  • the electric drive unit 61 has, for example, a rotary extruder 62 and a conversion mechanism 63 that converts the rotary motion of the extruder 62 into a linear motion.
  • the linear motion of the conversion mechanism 63 is transmitted to the movable member 49 so as to move the movable member 49 relative to the moving die plate 17 in the mold opening / closing direction.
  • the extrusion pin 41 is driven in the mold opening / closing direction with respect to the mobile mold 105.
  • a transmission mechanism for transmitting the rotation of the extruder 62 to the conversion mechanism 63 may be provided between the extruder 62 and the conversion mechanism 63.
  • the transmission mechanism include a gear mechanism, a winding transmission mechanism (pulley / belt mechanism or a sprocket / chain mechanism), or a combination thereof.
  • the transmission mechanism may be one that changes the direction of rotation, such as a gear mechanism including a bevel gear.
  • the extrusion motor 62 has a stator that constitutes one of the armature or the field, and a rotor that constitutes the other of the armature or the field. The rotor rotates about an axis with respect to the stator.
  • the specific configuration of the extruder 62 may be appropriate.
  • the extrusion motor 62 may be a DC motor, an AC motor, an induction motor, or a synchronous motor. It may or may not have a brake.
  • the extrusion motor 62 may function as a constant speed motor provided in an open loop, or may function as a servomotor provided in a closed loop.
  • the arrangement position and orientation of the extrusion motor 62 may be appropriately set. As is clear from the fact that a transmission mechanism (pulley, belt mechanism, etc.) that transmits the rotation of the extruder 62 to the conversion mechanism 63 may be provided, the arrangement position and orientation of the extruder 62 are arbitrary.
  • the extruder 62 is supported by a moving die plate 17.
  • the arrangement position is set to the side (side surface) of the moving die plate 17.
  • the direction of the extruder 62 is such that the direction in which the output shaft (integrated with the screw shaft 63a described later in the illustrated example) extends from the main body portion (stator) is the mold opening direction (left side of the paper surface). ing.
  • the extruder 62 is arranged coaxially with the conversion mechanism 63, and directly inputs the rotation to the conversion mechanism 63 without going through the transmission mechanism.
  • the extruder 62 may be located above (upper surface) of the moving die plate 17 or behind (back surface) of the moving die plate 17.
  • the output shaft may be directed upwards, downwards, laterally or in the mold closing direction.
  • the rotation of the extrusion motor 62 may be appropriately changed (accelerated or decelerated) by the transmission mechanism and transmitted.
  • the extrusion motor 62 (from another viewpoint, the electric drive unit 61) may be supported by the movable member 49 instead of the moving die plate 17.
  • the position of the extruder 62 in this case is also arbitrary.
  • the conversion mechanism 63 is configured by a screw mechanism (for example, a ball screw mechanism or a sliding screw mechanism).
  • the screw mechanism has a screw shaft 63a and a nut 63b screwed to the screw shaft 63a.
  • One member of the screw shaft 63a and the nut 63b (screw shaft 63a in the illustrated example) moves, for example, in the axial direction (paper surface left-right direction) with respect to the member supporting the extruder 62 (moving die plate 17 in the illustrated example). Is regulated and rotation around the axis is allowed.
  • the other member of the screw shaft 63a and the nut 63b (nut 63b in the illustrated example) is allowed to move in the axial direction with respect to the member (moving die plate 17) supporting the extruder 62, and is rotated around the axis, for example. Is regulated. Therefore, when one of the members is rotated, the other member moves in the axial direction.
  • the conversion mechanism 63 is arranged so that the axial direction is parallel to the mold opening / closing direction.
  • the screw shaft 63a as one of the members is supported by the moving die plate 17 so as not to be movable in the axial direction and rotatable around the axis.
  • the nut 63b as the other member is fixed to the movable member 49. Therefore, when the extruder 62 is rotated and the rotation is input to the screw shaft 63a, the nut 63b moves in the mold opening / closing direction, and the movable member 49 is driven in the mold opening / closing direction.
  • the screw shaft 63a and the nut 63b may be supported and fixed as appropriate.
  • the screw shaft 63a is integrally configured with the output shaft of the extruder 62.
  • the main body portion (stator) of the extruder 62 is fixed to the moving die plate 17.
  • the output shaft is supported by the main body portion so as not to be movable in the axial direction and rotatably around the axis.
  • the screw shaft 63a is supported by the moving die plate 17 which is immovable in the axial direction and is rotatable around the shaft.
  • the nut 63b is fixed to the movable member 49 by being composed of a part of the movable member 49.
  • the screw shaft 63a is not integrally configured with the output shaft of the extruder 62, but is connected to the output shaft via a coupling, or has a transmission mechanism (pulley, etc.) between the screw shaft 63a and the output shaft. A belt mechanism, etc.) may be interposed.
  • the screw shaft 63a may be supported by the moving die plate 17 via, for example, an appropriate bearing.
  • the nut 63b may be composed of a member separate from the movable member 49 and may be fixed to the movable member 49 by engagement, fastening and / or joining or the like.
  • the nut 63b may rotate and the screw shaft 63a may be driven in the axial direction.
  • the extruder 62 may be supported by the movable member 49.
  • the member of the screw shaft 63a and the nut 63b supported by the movable member 49 is rotated, and the rotation of the member supported by the moving die plate 17 is restricted.
  • the conversion mechanism 63 another conversion mechanism (for example, a rack and pinion mechanism or a link mechanism) may be provided instead of the screw mechanism.
  • the stroke of the nut 63b (forward or backward limit from another point of view) is defined by, for example, the length of the range in which the thread groove is cut in the screw shaft 63a in the conversion mechanism 63 alone.
  • This stroke (drive limit) may or may not specify the forward limit or the backward limit of the extrusion pin 41. From another point of view, the conversion mechanism 63 may or may not be used at full stroke.
  • the mounting position of the core device 13 may be above (illustrated example), below, or sideways with respect to the fixed type 103 or the mobile type 105.
  • the moving direction of the core 109 may be any of a vertical direction (illustrated example), a horizontal direction, and a direction inclined with respect to these directions when viewed in the mold opening / closing direction.
  • the following description may be performed on the premise that the core device 13 is located above the mobile type 105 and the core 109 is driven in the vertical direction, as shown in the illustrated example, for convenience.
  • the core device 13 is fixed to one of the fixed type 103 and the mobile type 105 (movable type 105 in the illustrated example) by, for example, the mounting portion 65.
  • the configuration of the mounting portion 65 may be various configurations including a known configuration.
  • the mounting portion 65 has a rod-shaped member extending upward from the upper surface of the mobile type 105.
  • the core device 13 is fixed to the upper end of the rod-shaped member.
  • FIG. 4 to 6 are cross-sectional views showing the configuration of the core device 13. It should be noted that these figures also show a partial configuration of the hydraulic pressure device 67 that supplies the hydraulic fluid to the core device 13.
  • the vertical direction of the paper surface corresponds to the vertical direction of the paper surface of FIG.
  • FIG. 4 shows a state when the core 109 is retracted from between the fixed type 103 and the mobile type 105.
  • FIG. 5 shows a state when the core 109 is inserted between the fixed type 103 and the mobile type 105.
  • FIG. 6 shows an initial state when the core 109 is retracted from between the fixed type 103 and the mobile type 105.
  • the core device 13 includes a support member 69 fixed to the movable mold 105 by the mounting portion 65, and a drive member 71 driven in the moving direction (vertical direction in the illustrated example) of the core 109 with respect to the support member 69. have.
  • the tip (lower end in the illustrated example) of the drive member 71 is a connecting portion 71a connected to the core 109.
  • the core device 13 has an electric drive unit 73 and a hydraulic pressure drive unit 75 in order to drive the drive member 71. That is, the core device 13 has a hybrid type drive unit that combines an electric type and a hydraulic type.
  • each part of the core device 13 is, for example, as follows.
  • the support member 69 may be appropriately set.
  • the support member 69 is configured to also serve as a cylinder member of the hydraulic pressure drive unit 75 (hydraulic cylinder).
  • the support member 69 has, for example, a cylindrical portion 69a extending vertically, a front end portion 69b that closes the tubular portion 69a from below, and a rear end portion 69c that closes the tubular portion 69a from above. ing.
  • the shape of the cross section (cross section parallel to the horizontal plane) of the tubular portion 69a is, for example, a circle.
  • the front end portion 69b seals the lower part of the tubular portion 69a in order to enclose the hydraulic fluid (for example, oil) in the tubular portion 69a.
  • the front end portion 69b may be, for example, a substantially plate-shaped member, and may have a flange protruding radially outward from the outer peripheral surface of the tubular portion 69a.
  • the flange of the front end portion 69b may be a portion to which the upper end of the rod-shaped member of the mounting portion 65 is connected.
  • the rear end portion 69c does not have to seal the upper side of the tubular portion 69a.
  • the rear end portion 69c may be, for example, a substantially plate-shaped member, and may have a flange protruding radially outward from the outer peripheral surface of the tubular portion 69a.
  • the flange of the rear end portion 69c may be used to support a part of the electric drive portion 73.
  • the shape and dimensions of the drive member 71 may be appropriately set.
  • the drive member 71 is configured to also serve as the piston rod of the hydraulic pressure drive unit 75. Therefore, the outer shape (outer surface shape) of the drive member 71 has a substantially axial shape that allows the opening of the front end portion 69b of the support member 69 (cylinder member) to slide.
  • the drive member 71 is hollow so as to accommodate a part of the electric drive unit 73.
  • the configuration of the connecting portion 71a of the drive member 71 may be various configurations including a known configuration.
  • the connecting portion 71a has a shape having a flange at the tip thereof, and is connected to the core 109 via a coupling.
  • the stroke of the drive member 71 may be appropriately set.
  • the forward limit is defined by the engagement portion 71b (described later) of the drive member 71 engaging the piston 81 (described later) from the rear (upper in the illustrated example) and the piston 81 reaching the forward limit. It's okay.
  • the retreat limit may be defined by engaging the engaging portion provided on the drive member 71 with the stopper provided on the support member 69 from the front to the rear.
  • the electric drive unit 73 includes, for example, a rotary core motor 76, a transmission mechanism 77 that transmits the rotation of the core motor 76, and a conversion mechanism 79 that converts the rotational motion from the transmission mechanism 77 into a linear motion. are doing. Then, the linear motion of the conversion mechanism 79 is transmitted to the drive member 71 to drive the drive member 71.
  • the description of the configuration of the extrusion motor 62 described above may be incorporated as long as there is no contradiction or the like.
  • the arrangement and orientation of the core motor 76 may be appropriately set.
  • the core motor 76 is arranged in parallel with the conversion mechanism 79 so that the output shaft faces the rear end side (the side opposite to the connecting portion 71a, upward in the illustrated example) of the drive member 71. ..
  • the electric drive unit 73 can be shortened.
  • the transmission mechanism 77 is composed of, for example, a pulley / belt mechanism.
  • the transmission mechanism 77 includes a first pulley 77a fixed to the output shaft of the core motor 76, a second pulley 77b fixed to the screw shaft 79a (described later) of the conversion mechanism 79, and these. It has a belt 77c that is hung on the pulley of the above. Therefore, when the core motor 76 is rotated, the rotation is input to the conversion mechanism 79 via the first pulley 77a, the belt 77c, and the second pulley 77b in this order.
  • the transmission mechanism 77 may or may not shift gears.
  • the diameter of the second pulley 77b is larger than the diameter of the first pulley 77a, and the transmission mechanism 77 accelerates the speed.
  • the transmission mechanism 77 may be a winding transmission mechanism (for example, a sprocket chain mechanism) or a mechanism other than the winding transmission mechanism (for example, a gear mechanism).
  • the transmission mechanism may be one that changes the direction of rotation, such as a gear mechanism including a bevel gear. Further, the transmission mechanism 77 may not be provided, and the rotation of the core motor 76 may be directly input to the conversion mechanism 79. For example, the output shaft of the core motor 76 may be coaxially connected to the screw shaft 79a.
  • the description of the configuration of the conversion mechanism 63 of the extruder 11 may be incorporated as long as there is no contradiction or the like.
  • the word of the screw shaft 63a is replaced with the word of the screw shaft 79a
  • the word of the nut 63b is replaced with the word of the nut 79b.
  • the conversion mechanism 79 and the conversion mechanism 63 have different roles from each other, their specific configurations and performances are different.
  • the conversion mechanism 79 is arranged so that the axial direction is parallel to the moving direction (vertical direction) of the core 109.
  • the nut 79b is connected to the drive member 71. Further, the nut 79b is restricted from rotating around the axis by restricting the rotation of the drive member 71 around the axis by a spline groove or the like.
  • the screw shaft 79a is supported by a bearing provided on the support member 69 so as not to be movable in the axial direction and rotatably around the shaft, and the rotation of the core motor 76 is input as described above. Therefore, when the core motor 76 is rotated, the nut 79b moves in the vertical direction, and the core 109 is moved in and out between the fixed type 103 and the mobile type 105.
  • the conversion mechanism 79 is basically housed inside the support member 69.
  • the rear end side portion of the screw shaft 79a is supported by the rear end portion 69c of the support member 69 via a bearing.
  • the nut 79b is fixed so that the axes of the nut 79b coincide with each other with respect to the rear end of the hollow drive member 71.
  • the drive member 71 has a position (FIG. 4) for accommodating at least a part of the screw shaft 79a (for example, 80% or more of the axial length of the portion where the thread groove is cut) due to the movement of the nut 79b, and a screw.
  • the stroke of the nut 79b (forward or backward limit from another point of view) is defined by the length of the conversion mechanism 79 alone, for example, in the range in which the thread groove is cut in the screw shaft 79a.
  • the stroke of the drive member 71 by defining the stroke of the drive member 71 by a stopper or the like, the forward limit and / or the retract limit of the nut 79b fixed to the drive member 71 may be defined.
  • the nut 79b may rotate to drive the screw shaft 79a in the axial direction.
  • the drive member 71 may be provided coaxially with the conversion mechanism 79 instead of concentrically.
  • another conversion mechanism for example, a rack and pinion mechanism
  • a rack and pinion mechanism may be provided.
  • the hydraulic pressure drive unit 75 is composed of, for example, a hydraulic pressure cylinder.
  • the term of the hydraulic drive unit 75 may be used as a term to refer to the hydraulic cylinder (core cylinder).
  • the hydraulic drive unit 75 has, for example, a support member 69 as a cylinder member and a piston 81 slidable in the support member 69 in the axial direction thereof.
  • the piston 81 divides the inside of the support member 69 into a front chamber 69d on the distal end side (lower in the illustrated example) of the drive member 71 and a rear chamber 69e on the opposite side thereof.
  • the piston 81 By supplying the hydraulic fluid to the front side chamber 69d, the piston 81 can be moved to the side of the rear side chamber 69e.
  • the rear concubine 69e is open to the atmosphere, unlike a general hydraulic cylinder. That is, the rear concubine 69e is not used to move the piston 81 toward the front concubine 69d.
  • the hydraulic pressure drive unit 75 may be configured to be able to drive the piston 81 toward the front chamber 69d by the hydraulic fluid, as in the case of a general hydraulic cylinder.
  • the drive member 71 is inserted so as to be slidable in the axial direction with respect to the piston 81. Further, the drive member 71 has an engaging portion 71b that engages with the piston 81 in the direction from the rear side chamber 69e to the front side chamber 69d.
  • the drive member 71 can be moved while the piston 81 is stopped. Further, for example, the driving member 71 is moved rearward (upward in the illustrated example) by driving the piston 81 toward the rear side chamber 69e while the engaging portion 71b is engaged with the piston 81. Can be done. Further, for example, in a state where the engaging portion 71b is engaged with the piston 81, the driving member 71 is moved forward (downward in the illustrated example) by the electric driving portion 73, whereby the piston 81 is moved to the front chamber 69d. Can be moved to the side.
  • the stroke St1 (FIG. 5) of the piston 81 is defined by forming a stopper having an appropriate shape inside the support member 69.
  • the forward limit (lower drive limit) of the piston 81 is defined by the front end 69b as a stopper, as shown in FIG.
  • the retreat limit (upward drive source) of the piston 81 is defined by a stopper (reference numeral omitted) configured by reducing the inner diameter of the support member 69.
  • the stroke St1 of the piston 81 is, for example, only a part of the stroke of the drive member 71 (the stroke of the electric drive unit 73 from another viewpoint) on the connecting portion 71a side.
  • the length of the former may be 1/2 or less, 1/5 or less, or 1/10 or less of the length of the latter.
  • the stroke St1 may coincide with the stroke of the drive member 71 or the stroke of the electric drive unit 73.
  • the hydraulic device 67 that supplies the hydraulic fluid to the hydraulic drive unit 75 is, for example, between the hydraulic pressure source 83 that sends out the hydraulic fluid, the tank 85 that stores the hydraulic fluid, and these elements and the front chamber 69d. It has a core valve 87 that controls the flow of the hydraulic fluid.
  • the hydraulic pressure source 83 is, for example, a pump, and the details will be described later.
  • the core valve 87 allows and prohibits the flow of the hydraulic fluid from the hydraulic pressure source 83 to the front chamber 69d, and allows and prohibits the flow of the hydraulic fluid from the front chamber 69d to the tank 85, for example.
  • the specific configuration of the core valve 87 may be various configurations including known configurations.
  • the core valve 87 may be composed of two or more valves. In the illustrated example, the core valve 87 is composed of a switching valve at 3 ports and 2 positions, and one of the hydraulic pressure source 83 and the tank 85 is selectively connected to the front chamber 69d.
  • the drive system is, for example, a solenoid that moves the valve body against the force of a spring.
  • the core valve 87 may have a function of controlling the flow rate. Further, the core valve 87 may be able to shut off the front chamber 69d from both the hydraulic pressure source 83 and the tank 85 (see the extrusion valve
  • the operation of the core device 13 is, for example, as follows.
  • the drive member 71 (nut 79b from another viewpoint) is located in the retracted limit (upper drive limit in the illustrated example), for example, as shown in FIG.
  • the core 109 is retracted from between the fixed type 103 and the mobile type 105.
  • the piston 81 is not involved in the positioning of the drive member 71 located at the retreat limit, it may be in an appropriate position.
  • the anterior chamber 69d may be connected to either the hydraulic pressure source 83 or the tank 85.
  • the piston 81 is located in the retreat limit.
  • the front chamber 69d is connected to the tank 85.
  • the control device 5 drives the core motor 76 to move the drive member 71 to the forward limit as shown in FIG.
  • the core 109 is arranged between the fixed type 103 and the mobile type 105.
  • the engaging portion 71b of the drive member 71 engages with the piston 81 from the rear.
  • the driving force of the core motor 76 is applied to the piston 81, and the piston 81 also moves to the forward limit.
  • the hydraulic fluid in the front chamber 69d is discharged to the tank 85 via the core valve 87.
  • the drive member 71 may be stopped at a desired position based on the detection value of the sensor that detects the position of the drive member 71, and the drive member 71 may not be moved to the forward limit.
  • the mold is opened and further extruded.
  • the control device 5 causes the electric drive unit 73 to retract the core 109 from between the fixed mold 103 and the mobile mold 105.
  • the hydraulic pressure drive unit 75 is controlled.
  • the control device 5 controls the core valve 87 (and / or the hydraulic pressure source 83) so as to supply the hydraulic fluid from the hydraulic pressure source 83 to the front chamber 69d.
  • the piston 81 moves to the rear chamber 69e side. Since the drive member 71 is engaged with the piston 81 from the rear, the drive member 71 moves rearward (upward in the illustrated example) as the piston 81 moves to the rear chamber 69e.
  • the core 109 starts moving in the direction of retracting from between the fixed mold 103 and the mobile mold 105, and separates from the molded product.
  • the electric drive unit 73 (core motor 76) generates, for example, a driving force for moving the drive member 71 backward together with the hydraulic pressure drive unit 75. good.
  • the driving force applied to the driving member 71 by the hydraulic pressure driving unit 75 or the driving force applied to the driving member 71 by the electric driving unit 73 may be larger, and the difference is appropriately set. good.
  • the former may be 2 times or more, 1 time or more, 1/2 or more, or less than 1/2 with respect to the latter.
  • the electric drive unit 73 does not apply a rearward driving force to the drive member 71, and the inertial force and frictional resistance of the electric drive unit 73 hinder the drive of the drive member 71 by the hydraulic drive unit 75.
  • the nut 79b may be moved at an appropriate speed so as not to become.
  • the core motor 76 may be in a torque-free state.
  • the control device 5 continues or starts the control of applying the driving force to the rear (upward in the illustrated example) to the driving member 71 by the electric driving unit 73, and the driving member 71 is started.
  • the core 109 continues to retreat and retreats from between the fixed type 103 and the mobile type 105.
  • the driving force is applied to the driving member 71 by the electric driving unit 73 even when the driving force is applied to the driving member 71 from the hydraulic pressure driving unit 75, the piston 81 retreats to control the electric driving unit 73. It may be the same or may change before and after reaching the limit.
  • the core device 13 is a hybrid type, for example, it is easy to apply a large force to the core 109 when the core 109 is separated from the molded product. This is because, for example, the hydraulic drive unit 75 used when separating the core 109 from the molded product can easily obtain a larger force than the electric drive unit 73, and / or the core 109. This is because the hydraulic drive unit 75 and the electric drive unit 73 can cooperate with each other when the product is separated from the molded product. On the other hand, after the core 109 is separated from the molded product, energy consumption can be saved by using only one of the hydraulic drive unit 75 and the electric drive unit 73 (for example, the electric drive unit 73). ..
  • the stroke of the piston 81 is only a part of the stroke on the tip end side (connecting portion 71a side) of the drive member 71 by the electric drive unit 73.
  • a large driving force can be obtained by utilizing the hydraulic pressure driving unit 75.
  • the amount of the hydraulic fluid supplied to the front chamber 69d can be reduced.
  • the hydraulic pressure device 67 can be miniaturized.
  • FIG. 7A is a circuit diagram showing an example of the configuration of the hydraulic pressure device 67 that supplies the hydraulic fluid to the extrusion device 11 (more specifically, the rod side chamber 55r of the hydraulic pressure drive unit 51).
  • the hydraulic pressure device 67 has a pump 89 as a hydraulic pressure source for delivering the hydraulic fluid and a tank 85 for storing the hydraulic fluid.
  • the pump 89 and the tank 85 are shared by the extruder 11 (more specifically, the hydraulic drive unit 51) and the core device 13 (more specifically, the hydraulic pressure drive unit 75).
  • the hydraulic pressure device 67 has the above-mentioned core valve 87.
  • the hydraulic pressure device 67 has an extrusion valve 91 that controls the flow of the hydraulic fluid between the pump 89 and the tank 85 and the extrusion device 11.
  • the pump 89 may be a rotary pump that discharges the hydraulic fluid by the rotation of the rotor, or may be a plunger pump that discharges the hydraulic fluid by the reciprocation of the piston.
  • the pump 89 may be configured by a constant-capacity pump in which the discharge amount in one cycle of the rotor or the piston is fixed, or may be configured by a variable-capacity pump in which the discharge amount is variable. Further, although it is sufficient that the pump 89 can discharge the hydraulic fluid in one direction, the structure may be the same as that of the bidirectional (two-way) pump.
  • the pump 89 is driven by, for example, a rotary pump motor 93.
  • the pump motor 93 may be a DC motor, an AC motor, an induction motor, or a synchronous motor.
  • the pump motor 93 may function as a constant speed motor provided in an open loop, or may function as a servomotor provided in a closed loop.
  • the pump motor 93 (pump 89) is driven, for example, only when necessary (for example, when supplying the hydraulic fluid to the rod side chamber 55r or the front side chamber 69d). This reduces energy consumption.
  • the pump motor 93 may be constantly driven.
  • the tank 85 is, for example, an open tank. That is, the tank 85 holds the hydraulic fluid under atmospheric pressure. Thus, for example, when the rod side chamber 55r or the front side chamber 69d is connected to the tank 85, the pressure in these cylinder chambers drops to atmospheric pressure or near pressure.
  • the extrusion valve 91 allows and prohibits the flow of the hydraulic fluid from the hydraulic pressure source 83 (here, the pump 89) to the rod side chamber 55r, and allows and prohibits the flow of the hydraulic fluid from the rod side chamber 55r to the tank 85. And do.
  • the specific configuration of the extrusion valve 91 may be various configurations including known configurations.
  • the extrusion valve 91 may be composed of two or more valves. In the illustrated example, the extrusion valve 91 is composed of a switching valve having 3 ports and 3 positions, and has two positions for connecting the rod side chamber 55r to the hydraulic pressure source 83 or the tank 85 and a rod side chamber 55r for the hydraulic pressure source. It is switched between one position that shuts off from both the 83 and the tank 85.
  • the drive system is, for example, a solenoid that moves the valve body against the force of a spring.
  • the extrusion valve 91 may have a function of controlling the flow rate.
  • the extrusion valve 91 may be one that can be switched at two positions, such as the core valve 87.
  • the hydraulic pressure device 67 may be entirely mounted (supported) on the moving die plate 17.
  • the hydraulic pressure device 67 schematically shows a unit 67a and a flow path 67b connecting the unit 67a and the rod side chamber 55r.
  • the unit 67a includes, for example, all the components other than the flow path of the hydraulic pressure device 67.
  • the components are, for example, a pump 89, a pump motor 93, a tank 85, an extrusion valve 91, and a core valve 87, as described above.
  • These components are, for example, grouped together in one place and unitized to form a unit 67a. However, these components may be appropriately dispersed and arranged with respect to the moving die plate 17 without being unitized.
  • the placement position of the unit 67a (or the above-mentioned components to be distributedly arranged. The same shall apply in this paragraph) may be appropriately set.
  • the unit 67a is located below the back surface of the moving die plate 17.
  • the unit 67a may be located on the side or upper side of the back surface of the moving die plate 17, or may be located on the upper surface or the side surface of the moving die plate 17.
  • the method of fixing the unit 67a to the moving die plate 17 may be an appropriate method such as one using screws or the like.
  • the flow path 67b connects the extrusion valve 91 and the rod side chamber 55r of the hydraulic pressure drive unit 51.
  • the rod side chamber 55r and the moving die plate 17 move relative to each other, so that the flow path 67b is, for example, At least part of it is made up of flexible members (eg hoses).
  • the flow path 67b may be composed of a member (for example, a pipe and a block) that can be regarded as a rigid body.
  • the unit 67a is mounted on the movable member 49, and the flow path 67b connecting the cylinder member 55 fixed to the movable member 49 and the unit 67a is configured by a member that can be regarded as a rigid body. May be good.
  • a flow path 67c (FIG. 7 (a)) connecting the unit 67a (valve for core 87) and the front chamber 69d of the hydraulic pressure drive unit 75 is also provided. Since the hydraulic pressure drive unit 75 is supported by the moving die plate 17 (via the mobile die 105), the flow path connecting the unit 67a supported by the mobile die plate 17 and the hydraulic pressure drive unit 75.
  • the 67c may be composed of a member that can be regarded as a rigid body, or may be composed of a flexible member.
  • FIG. 7B is a circuit diagram showing the configuration of the hydraulic pressure device 67A according to the modified example.
  • the hydraulic pressure device 67 basically, only the difference from the hydraulic pressure device 67 will be described. Matters not particularly mentioned may be the same as those of the hydraulic pressure device 67, or may be inferred from the hydraulic pressure device 67.
  • the hydraulic pressure source 83 is an accumulator 95.
  • the pump 89 is used, for example, to fill the accumulator 95.
  • the accumulator 95 may be composed of an appropriate type accumulator such as a weight type, a spring type, a gaseous pressure type (including a pneumatic type), a cylinder type, and a Prada type.
  • the accumulator 95 is a gas pressure type, cylinder type or Prada type accumulator, and the gas (for example, air or nitrogen) held in the accumulator 95 is compressed to accumulate pressure.
  • a valve 97 may be provided between the pump 89 and the accumulator 95 to reduce the probability that the hydraulic fluid will flow back from the accumulator 95 to the pump 89.
  • the configuration of the valve 97 may be appropriate.
  • the valve 97 is a check valve that allows the flow of hydraulic fluid from the pump 89 to the accumulator 95 and prohibits the flow in the opposite direction.
  • the die casting machine 1 may have various sensors so that the control device 5 can control the operation of the machine body 3. Then, the control device 5 may control the mold clamping device 7, the injection device 9, the extrusion device 11, the core device 13, and the like based on the detection values of various sensors.
  • a position sensor may be provided to detect the position of the movable member 49 with respect to the moving die plate 17 (in another viewpoint, the position of the extrusion pin 41 with respect to the moving die 105).
  • the position sensor include, for example, a linear encoder or a laser length measuring instrument.
  • a sensor at the drive source may be provided. Examples of such a sensor include a sensor (for example, an encoder or a resolver) that detects the rotation of the extruder 62, and a position sensor that detects the position of the piston rod 59 with respect to the cylinder member 55.
  • a sensor capable of detecting the driving force generated by the driving source may be provided. Examples of such a sensor include a sensor that detects the torque of the extruder 62 and a sensor that detects the pressure in the cylinder chamber of the hydraulic cylinder.
  • Example of molded product 8 (a) to 10 are schematic views for explaining the operation of extruding the molded product by the extruder 11. These figures are a further schematic representation of FIG. 3 and show a fixed die 103 and a fixed die plate 15 (not shown in FIG. 3). The extrusion operation proceeds from FIG. 8A to FIG. 10 in order.
  • FIG. 8A shows a state in which the molding material in the mold 101 to be molded is solidified to form the molded product 111.
  • the relative position of the extrusion pin 41 with respect to the movable type 105 is the initial position.
  • the initial position may be, for example, a position where the tip of the extrusion pin 41 coincides with the inner surface of the cavity 107, and / or a recession limit of the extrusion pin 41 with respect to the mobile 105, as described above.
  • the relative position of the piston rod 59 with respect to the cylinder member 55 is a position corresponding to the initial position of the extrusion pin 41.
  • the relative position is a position where the piston rod 59 engages with the piston 57 located in the drive limit on the side of the rod side chamber 55r from the side of the head side chamber 55h.
  • the relative position of the nut 63b (movable member 49) with respect to the screw shaft 63a is a position corresponding to the initial position of the extrusion pin 41.
  • the relative position is the drive limit on the left side of the paper surface with respect to the screw shaft 63a of the nut 63b, or a position close to the drive limit.
  • the control device 5 has stopped supplying the hydraulic fluid from the hydraulic pressure device 67 to the hydraulic pressure drive unit 51, for example. More specifically, for example, the control device 5 has stopped the pump motor 93 and / or prohibited the supply of the hydraulic fluid to the rod side chamber 55r by the extrusion valve 91 (the rod side chamber 55r is the tank 85). The rod side chamber 55r is shielded from both the hydraulic pressure source 83 and the tank 85). Similarly, the control device 5 also stops supplying the hydraulic fluid from the hydraulic pressure device 67 to the core device 13, for example. More specifically, for example, the control device 5 has stopped the pump motor 93 and / or prohibited the supply of the hydraulic fluid to the rod side chamber 55r by the core valve 87. Further, the control device 5 stops the extrusion motor 62 and the core motor 76. The stopped state may be a torque-free state, a state in which the brake is functioning, or a state in which the position control for maintaining the stop is performed.
  • control device 5 rotates the mold clamping motor 27 in the direction opposite to that at the time of mold clamping.
  • the moving die plate 17 moves in the mold opening direction, and the moving mold 105 held by the moving die plate 17 separates from the fixed mold 103.
  • the molded product 111 moves in the mold opening direction together with the moving mold 105 and separates from the fixed mold 103.
  • the injection device 9 may push the molded product toward the mobile type 105 by the plunger 37.
  • the movable member 49 and the extruder 11 also move in the mold opening direction. More specifically, for example, the movable member 49 receives a driving force from the moving die plate 17 in the mold opening direction via the moving die 105, the molded product 111, the extrusion pin 41, the extrusion plate 43, and the extrusion rod 47. Further, depending on the configuration of the conversion mechanism 63, the movable member 49 receives a driving force from the moving die plate 17 in the mold opening direction via the electric driving unit 61.
  • the cylinder member 55 and the piston 57 receive, for example, a driving force from the moving die plate 17 in the mold opening direction via the movable member 49.
  • the piston rod 59 receives a driving force in the mold opening direction directly from the moving die plate 17.
  • the rod side chamber 55r may be shielded from both the hydraulic pressure source 83 and the tank 85 by the extrusion valve 91, for example, in order to reduce the probability that the piston 57 and the cylinder member 55 move relative to each other. Further, in the extrusion motor 62, in order to reduce the probability that the nut 63b and the screw shaft 63a move relative to each other, the brake may be operated or the position may be controlled to maintain the stop.
  • the control device 5 uses, for example, a moving die plate based on a detection value of a position sensor (not shown) for detecting the position of the moving die plate 17 or a sensor (not shown) for detecting the rotation of the mold clamping motor 27.
  • a position sensor not shown
  • a sensor not shown
  • the mold clamping motor 27 is stopped, and by extension, the moving die plate 17 is stopped.
  • a space is secured between the fixed mold 103 and the mobile mold 105 so that the molded product 111 can be extruded by the extruder 11.
  • the control device 5 controls the core device 13 so as to pull out the core 109 from the molded product 111 when the moving die plate 17 is moving in the mold opening direction or after stopping as described above. This control has already been described.
  • the control device 5 controls the hydraulic pressure device 67 so that the hydraulic fluid is supplied from the hydraulic pressure source 83 to the rod side chamber 55r.
  • the start of the supply of the hydraulic fluid may be made by starting the drive of the pump motor 93 and / or by connecting the rod side chamber 55r of the extrusion valve 91 to the hydraulic pressure source 83.
  • the piston 57 moves relative to the cylinder member 55 in the mold opening direction, and eventually the piston rod 59 engaged with the piston 57 molds open with respect to the cylinder member 55. Move relative to the direction.
  • the movable member 49 moves relative to the moving die plate 17 in the mold closing direction.
  • the control device 5 rotates the extruder 62 in the rotation direction corresponding to the relative movement of the movable member 49 with respect to the moving die plate 17 in the mold closing direction.
  • both the hydraulic drive unit 51 and the electric drive unit 61 drive the extrusion pin 41 toward the fixed mold 103 with respect to the mobile mold 105.
  • the control device 5 may, for example, use a hydraulic pressure device 67 (for example, a pump motor) based on a detection value of a force sensor (not shown) for detecting the force applied to the molded product by the extrusion pin 41.
  • a hydraulic pressure device 67 for example, a pump motor
  • a force sensor for detecting the force applied to the molded product by the extrusion pin 41.
  • 93 or the flow control valve and the pressure control to control the extrusion motor 62 may be performed, and / or the hydraulic pressure is based on the detection value of the position sensor (not shown) that detects the position of the extrusion pin 41 with respect to the movable type 105.
  • Position control and / or speed control may be performed to control the device 67 (for example, the pump motor 93 or the flow control valve) and the extrusion motor 62.
  • the control device 5 controls the hydraulic pressure device 67 so as to stop the supply of the hydraulic fluid to the rod side chamber 55r, and ends the driving of the extrusion pin 41 by the hydraulic pressure drive unit 51.
  • the supply of the hydraulic fluid may be stopped by stopping the pump motor 93 and / or by operating the extrusion valve 91.
  • the operation of the extrusion valve 91 here is, for example, an operation of shutting off the rod side chamber 55r from both the hydraulic pressure source 83 and the tank 85, or an operation of connecting the rod side chamber 55r to the tank 85.
  • the piston 57 may come into contact with a stopper (not shown) provided on the cylinder member 55 and stop at the same time as or before the stop of the supply of the hydraulic fluid.
  • the above-mentioned predetermined condition when the supply of the hydraulic fluid to the rod side chamber 55r is stopped is, for example, that the amount of movement of the extruded pin 41 (molded product 111 from another viewpoint) detected by a position sensor (not shown) is a predetermined distance. It may be considered that d1 has been reached or that the force applied to the extrusion pin 41 detected by the force sensor (not shown) has fallen below a predetermined threshold value. As a result of stopping under the latter condition, the movement amount of the distance d1 may be obtained.
  • the extrusion pin 41 is driven by the extrusion device 11.
  • the extrusion pin 41 is driven by the extruder 11. May be good.
  • the extrusion pin 41 is driven only by the electric drive unit 61 among the hydraulic pressure drive unit 51 and the electric drive unit 61. This reduces, for example, energy consumption. Specifically, it is as follows.
  • the control device 5 rotates the extrusion motor 62 in the rotation direction corresponding to the relative movement of the movable member 49 with respect to the moving die plate 17 in the mold closing direction.
  • the extrusion pin 41 moves relative to the movable mold 105 toward the fixed mold 103.
  • the molded product 111 which is separated from the mobile mold 105 at the above-mentioned distance d1, further moves the distance d2 and separates from the mobile mold 105.
  • the control device 5 may perform position control and / or speed control for controlling the extrusion motor 62 based on the position of the extrusion pin 41 with respect to the moving type 105 detected by the position sensor (not shown), for example.
  • the piston rod 59 is fixed to the moving die plate 17, and the cylinder member 55 is fixed to the movable member 49. Therefore, when the movable member 49 is driven in the mold closing direction with respect to the moving die plate 17 by the extrusion motor 62 as described above, the piston rod 59 moves relative to the cylinder member 55 in the mold opening direction.
  • the piston rod 59 is allowed to move relative to the piston 57 in the mold opening direction. Therefore, the piston 57 can stay without moving relative to the cylinder member 55.
  • the hydraulic pressure device 67 can maintain a state in which the supply of the hydraulic fluid to the rod side chamber 55r is stopped.
  • the predetermined condition may be, for example, that the amount of movement of the extrusion pin 41 (molded article 111) detected by a position sensor (not shown) has reached the distance d1 + d2.
  • the extrusion pin 41 in another aspect, the extrusion plate 43, the movable member 49 and / or the nut 63b) may reach the drive limit and stop. .. In other words, as a result of the extrusion pin 41 reaching the drive limit and stopping, the movement amount of the distance d1 + d2 may be secured.
  • the distance d1 and the distance d2 may be set as appropriate.
  • the movement of the distance d1 may be mainly intended to separate the molded product 111, which is in close contact with the mobile mold 105, from the mobile mold 105.
  • the distance d1 may be shortened as much as possible.
  • the distance d1 may be 5 mm or less.
  • the movement of the distance d2 may be mainly intended to secure the distance of the molded product 111 from the moving mold 105. The securing of the distance facilitates, for example, taking out the molded product 111 by an apparatus (not shown).
  • the distance d1 may be shorter than the distance d2, for example, and may be 1/2 or less, 1/5 or less, or 1/10 or less of the distance d2.
  • the extrusion pin 41 (moving die plate 17 from another viewpoint) is returned to the initial position. In other words, the preparation for the next cycle is made.
  • control device 5 rotates the extruder 62 in the rotation direction corresponding to the relative movement of the movable member 49 with respect to the moving die plate 17 in the mold opening direction. As a result, the extrusion pin 41 moves toward the initial position.
  • the cylinder member 55 is fixed to the movable member 49, and the piston rod 59 is fixed to the moving die plate 17. Therefore, as the movable member 49 moves relative to the moving die plate 17 in the mold opening direction, the piston rod 59 moves relative to the cylinder member 55 in the mold closing direction. In the process, the engaging portion 59b of the piston rod 59 engages with the piston 57. Then, the piston 57 and the piston rod 59 move relative to the cylinder member 55 in the mold closing direction. After that, the piston rod 59 and the piston 57 reach the positions corresponding to the initial positions of the extrusion pins 41 (see FIG. 8A).
  • the hydraulic fluid discharged from the rod side chamber 55r whose volume is reduced is discharged to, for example, the tank 85.
  • the hydraulic pressure source 83 is the accumulator 95, at least a part of the hydraulic fluid discharged from the rod side chamber 55r may be filled in the accumulator 95.
  • the control device 5 is, for example, an initial position of the extrusion pin 41 by a position sensor (not shown) that detects the relative position of the extrusion pin 41 with respect to the moving die 105 (in another viewpoint, the relative position of the movable member 49 with respect to the moving die plate 17). Detects return to. Then, when the control device 5 detects the return to the initial position, the extrusion motor 62 is stopped.
  • the extrusion device 11 drives an extrusion pin 41 inserted in the mold opening / closing direction with respect to one of the fixed mold 103 and the mobile mold 105 (the mobile mold 105 in the present embodiment). It is a thing.
  • the extruder 11 has a hydraulic drive unit 51 and an electric drive unit 61.
  • the hydraulic drive unit 51 and the electric drive unit 61 both drive the extrusion plate 43 fixed to the extrusion pin 41 with respect to the die plate (moving die plate 17 in this embodiment) holding one of the above molds. ..
  • the extrusion plate 43 is located in the space 105s formed by the die base 105a of the mobile type 105.
  • the molding machine (die casting machine 1) according to the present embodiment has the extrusion device 11 as described above, the mold clamping device 7, and the injection device 9.
  • the mold clamping device 7 has a fixed die plate 15 for holding the fixed mold 103 and a moving die plate 17 for holding the mobile mold 105.
  • the injection device 9 injects the molding material into the cavity 107 composed of the mobile type 105 and the fixed type 103.
  • a new extrusion device 11 (die casting machine 1) for driving the extrusion plate 43 located in the space 105s of the die base 105a by the hydraulic pressure drive unit 51 and the electric drive unit 61 is provided, and the technique is enriched.
  • the hydraulic drive unit drives the extrusion plate with respect to the moving die plate
  • the electric drive unit drives the extrusion pin with respect to the extrusion plate (see Patent Document 3).
  • the two drives are connected in parallel to the extrusion pin.
  • the extrusion plate 43 is located in the space 105s, and the extrusion pin 41 penetrates only the movable type 105. That is, unlike the embodiment in which the extrusion plate 43 is located behind the moving die plate 17 (see Patent Document 1), the extrusion pin 41 does not have a length that penetrates the moving die plate 17. Therefore, when a large driving force is applied to the extrusion pin 41 as described above, the probability that the extrusion pin 41 is deformed such as buckling is reduced.
  • the hydraulic pressure drive unit 51 and the electric drive unit 61 are combined, the load on the hydraulic pressure drive unit 51 can be reduced as compared with the embodiment in which extrusion is performed only by the hydraulic pressure drive unit 51, for example.
  • the amount of the hydraulic fluid can be reduced and the energy consumption can be reduced.
  • the extrusion device 11 may have an extrusion rod 47 and a movable member 49.
  • the extrusion rod 47 may be inserted into the die plate (moving die plate 17) in the mold opening / closing direction, and may be connected to the extrusion plate 43.
  • the movable member 49 may be located on the side opposite to the extrusion plate 43 with respect to the moving die plate 17, and may be connected to the extrusion rod 47.
  • the hydraulic pressure drive unit 51 and the electric drive unit 61 may move the movable member 49 with respect to the moving die plate 17 and apply a driving force to the extrusion plate 43 via the movable member 49 and the extrusion rod 47.
  • the hydraulic drive unit 51 and / or the electric drive unit 61 is directly connected to the extrusion plate 43 (this embodiment is also included in the technique according to the present disclosure).
  • the hydraulic pressure drive unit 51 and / or the electric drive unit 61 is arranged inside the space 105s or the moving die plate 17. Will be done.
  • the size of the hydraulic drive unit 51 and / or the electric drive unit 61 is limited.
  • the mobile 105 must be special. However, by providing the extrusion rod 47 and the movable member 49, such inconvenience is eliminated.
  • the degree of freedom in designing the hydraulic drive unit 51 and the electric drive unit 61 is improved. Further, since the movable member 49 is connected to both the hydraulic drive unit 51 and the electric drive unit 61, the movable member 49 tends to be a large member. However, because it is located behind the moving die plate 17, it is permissible to have such a large member. From another viewpoint, by making the movable member 49 a relatively large member, the electric drive unit 61 can be positioned at a position away from the hydraulic pressure drive unit 51 (for example, the side surface or the upper surface of the moving die plate 17). The degree of freedom in arranging the hydraulic pressure drive unit 51 and / or the electric drive unit 61 is improved.
  • the extruder 11 extends from the die plate (moving die plate 17) to the side opposite to one mold (moving mold 105), and is a guide 53 that supports the movable member 49 and guides the movable member 49 in the mold opening / closing direction. May have.
  • the movement of the movable member 49 is stable. Further, for example, it is easy to increase the size of the movable member 49. By increasing the size of the movable member 49, the degree of freedom in arranging the hydraulic pressure drive unit 51 and / or the electric drive unit 61 is improved as described above.
  • Only one hydraulic pressure drive unit 51 may be provided. Only two electric drive units 61 may be provided. The connection position of the two electric drive units 61 with respect to the movable member 49 in the mold opening / closing direction may be point-symmetrical with respect to the connection position of the hydraulic pressure drive unit 51 with respect to the movable member 49.
  • the balance of the driving force applied to the movable member 49 is improved, and the probability that an unintended moment is generated is reduced.
  • the sliding resistance between the members for example, the sliding resistance between the movable member 49 and the guide 53
  • the extrusion pin 41 can be driven at high speed and the wear of the member can be reduced.
  • the electric drive units 61 of each electric drive unit 61 are compared with the embodiment in which only one electric drive unit 61 is used (the embodiment is also included in the technique according to the present disclosure). The burden can be reduced.
  • a general-purpose electric motor or a similar one can be adopted as the extrusion motor 62, and it is expected that the cost will be reduced.
  • the hydraulic pressure drive unit 51 may have a cylinder member 55, a piston 57, and a piston rod 59.
  • the cylinder member 55 directly or indirectly (in this embodiment, the movable member 49 and the extrusion rod 47) is directly or indirectly (in this embodiment, the movable member 49 and the extrusion rod 47) with respect to one member (extrusion plate 43 in this embodiment) of the die plate (moving die plate 17) and the extrusion plate 43. It may be fixed (indirectly through) and move with the extrusion plate 43.
  • the piston 57 may divide the inside of the cylinder member 55 into a first cylinder chamber (rod side chamber 55r in this embodiment) and a second cylinder chamber (head side chamber 55h in this embodiment).
  • the piston rod 59 may extend from the inside of the cylinder member 55 to the outside of the cylinder member 55, directly or indirectly with respect to the other member of the moving die plate 17 and the extrusion plate 43 (moving die plate 17 in this embodiment). It may be fixed (directly in this embodiment) and moved with the moving die plate 17. At least, the piston 57 may be restricted from moving relative to the piston rod 59 from the side of the rod side chamber 55r to the side of the head side chamber 55h.
  • the rod side chamber 55r may be a cylinder chamber to which a hydraulic fluid is supplied when the extrusion pin 41 is driven toward the other mold (fixed mold 103) with respect to one mold (moving mold 105).
  • the head side chamber 55h may be open to the atmosphere.
  • the effect of reducing the hydraulic fluid of the hydraulic pressure drive unit 51 is improved. That is, since the return of the extrusion pin 41 to the initial position and the movement of the piston 57 to the rod side chamber 55r side can be performed by the electric drive unit 61 as described with reference to FIG. 10, the head side chamber The need to fill the hydraulic fluid in 55h can be eliminated.
  • the piston rod 59 may have a rod body 59a and an engaging portion 59b.
  • the rod body 59a may be inserted into the piston 57 so as to be slidable with respect to the piston 57 in the axial direction of the piston 57.
  • the engaging portion 59b is located in the second cylinder chamber (head side chamber 55h), is fixed to the rod body 59a, and engages with the piston 57 from the side of the head side chamber 55h to the side of the first cylinder chamber (rod side chamber 55r). It may be possible.
  • the hydraulic fluid is supplied to the rod side chamber 55r to move the piston 57 to the side of the head side chamber 55h, the piston 57 is engaged with the engaging portion 59b, and the piston rod is used.
  • the extrusion pin 41 can be moved to the side of the fixed mold 103 with respect to the moving mold 105. That is, the extrusion pin 41 can be driven by the hydraulic pressure drive unit 51 (further, the electric drive unit 61 in this embodiment). After that, as shown in FIG.
  • the rod side chamber The amount of hydraulic fluid supplied to 55r can be reduced.
  • the configuration in which the head side chamber 55h is opened to the atmosphere and the configuration in which the piston rod 59 is relatively moved with respect to the piston 57 are combined, for example, the effect of dramatically reducing the required amount of the hydraulic fluid in the hydraulic drive unit 51 is dramatically reduced. improves.
  • the configuration in which the piston rod 59 is relatively moved with respect to the piston 57 may be combined with a configuration in which the head side chamber 55h is filled with the hydraulic fluid, unlike the present embodiment.
  • the extruder 11 may further have a hydraulic pressure source 83 that supplies the hydraulic fluid to the hydraulic pressure drive unit 51.
  • the die plate holding one mold through which the extrusion pin 41 is inserted may be the moving die plate 17 holding the mobile mold 105.
  • the hydraulic pressure source 83 may be supported by the moving die plate 17.
  • the amount of movement of the moving die plate 17 due to opening and closing of the mold (the amount of movement with respect to the base 14) is larger than the amount of relative movement of the movable member 49 with respect to the moving die plate 17 (the amount of movement of the extrusion pin 41 with respect to the moving mold 105). .. Therefore, unlike the present embodiment, in the embodiment in which the hydraulic pressure source 83 is directly supported by the base 14 (the embodiment may also be included in the technique according to the present disclosure), the hydraulic pressure source 83 and the hydraulic pressure are used. Relative movement with the drive unit 51 is roughly based on the amount of movement of the moving die plate 17.
  • the hydraulic pressure source 83 and the hydraulic pressure drive unit 51 move relative to each other by the amount of relative movement of the movable member 49 with respect to the moving die plate 17. Therefore, in the present embodiment, the relative movement amount between the hydraulic pressure source 83 and the hydraulic pressure driving unit 51 becomes small. As a result, the flow path connecting the two (for example, the flow path 67b) can be shortened. As a result, the amount of the hydraulic fluid can be reduced, and the influence of compression of the hydraulic fluid in the flow path on the control of the hydraulic pressure drive unit 51 can be reduced.
  • the electric drive unit 61 may have a rotary motor (extruder motor 62) and a conversion mechanism 63 that converts the rotation of the extruder 62 into a linear motion in the mold opening / closing direction.
  • the conversion mechanism 63 may have a screw shaft 63a and a nut 63b.
  • the screw shaft 63a may extend in the mold opening / closing direction, may be restricted from moving in the axial direction with respect to the die plate (moving die plate 17), may be allowed to rotate around the shaft, and may rotate. May be entered (directly or indirectly).
  • the nut 63b may be screwed onto the screw shaft 63a, may allow axial movement with respect to the moving die plate 17, may be restricted in rotation around the shaft, and may be fixed to the extrusion plate 43. good.
  • the electric drive unit 61 can be configured at a lower cost as compared with the embodiment using a linear motor (the embodiment may also be included in the technique according to the present disclosure). can. Further, by adjusting the lead of the screw shaft 63a, a large driving force can be obtained or the movable member 49 can be driven at high speed.
  • the extrusion device 11 may have a control device 5 that controls a hydraulic drive unit 51 and an electric drive unit 61.
  • the control device 5 moves the molded product 111 away from the mobile mold 105 by both the hydraulic pressure drive unit 51 and the electric drive unit 61.
  • the extrusion plate 43 may be configured to move relative to the die plate (moving die plate 17). Further, after the relative movement, the control device 5 further moves the extrusion plate 43 with respect to the moving die plate 17 in the direction of separation by only the electric drive unit 61 of the hydraulic pressure drive unit 51 and the electric drive unit 61. It may be configured to control relative movement.
  • the molding machine (die casting machine 1) is located between the extrusion device 11 as described above, the hydraulic pressure source 83 that supplies the hydraulic fluid to the hydraulic pressure drive unit 51 of the extrusion device 11, and the fixed mold 103 and the mobile mold 105. It may have a core device 13 for moving the core 109 in and out.
  • the core device 13 includes a hydraulic core cylinder (hydraulic drive unit 75) that generates a driving force transmitted to the core 109, and a core electric motor 76 that generates a driving force transmitted to the core 109. May have.
  • the hydraulic pressure source 83 may supply the hydraulic fluid not only to the hydraulic pressure drive unit 51 but also to the hydraulic pressure drive unit 75.
  • the hydraulic pressure source 83 that supplies the hydraulic fluid to the hybrid extruder 11 may also be used for the hybrid core apparatus 13.
  • the hydraulic pressure device 67 can be downsized. Since both the extruder 11 and the core device 13 are hybrid types capable of reducing the hydraulic fluid, the effect of downsizing the hydraulic pressure device 67 is improved.
  • the molding machine (die casting machine 1) includes an extruder 11 as described above, a hydraulic pressure source 83 that supplies a working liquid to the hydraulic pressure drive unit 51 of the extruder 11, and a fixed type 103. It may have a core device 13 for moving the core 109 in and out of the mobile 105.
  • the core device 13 may have a hydraulic core cylinder (hydraulic drive unit 75) that generates a driving force transmitted to the core 109.
  • the hydraulic drive unit 75 may be directly or indirectly supported by the moving die plate 17 (indirectly via the mobile 105 in this embodiment).
  • the hydraulic pressure source 83 which is supported by the moving die plate 17 and supplies the hydraulic fluid to the hydraulic pressure drive unit 51 to the extrusion device 11, may also supply the hydraulic fluid to the hydraulic pressure drive unit 75 of the core device 13.
  • the hydraulic pressure source 83 is directly supported by the base 14 as compared with the hydraulic pressure drive unit 51.
  • the flow path (for example, the flow path 67c) connecting the 83 and the hydraulic pressure drive unit 75 can be shortened.
  • the flow path can be configured by a member that can be regarded as a rigid body. Therefore, the effect of the above-mentioned effect (for example, reduction of the hydraulic fluid) by providing the hydraulic pressure source 83 on the moving die plate 17 is improved.
  • the hydraulic pressure source 83 is shared by the hydraulic pressure drive unit 51 and the hydraulic pressure drive unit 75, for example, the hydraulic pressure device 67 can be downsized. Due to the miniaturization, the inertial force when moving the moving die plate 17 is reduced.
  • FIG. 11 is a diagram showing the configuration of the die casting machine 201 (extruder 211) according to the second embodiment, and corresponds to FIG. 2 of the first embodiment.
  • the die casting machine 201 according to the present embodiment differs from the die casting machine 1 of the first embodiment only in the configuration of the hydraulic pressure drive unit of the extruder. Specifically, in the hydraulic drive unit 251 of the extruder 211 according to the present embodiment, the piston 257 and the piston rod 259 are fixed.
  • FIGS. 8 (a) to 10 are schematic views for explaining the operation of extrusion of the molded product in the die casting machine 201, and correspond to FIGS. 8 (a) to 10 of the first embodiment.
  • FIG. 12 (a) corresponds to FIG. 8 (a).
  • FIG. 12 (b) corresponds to FIG. 8 (b).
  • the piston 257 is added to or instead of the movable member 49 from the piston rod 259. Receives force in the opening direction.
  • FIG. 13 (a) corresponds to FIG. 9 (a).
  • the piston rod 259 does not move together with the piston 257 due to being engaged with the piston 257, but is fixed to the piston 257. By doing so, it moves with the piston 257.
  • FIG. 13 (b) corresponds to FIG. 9 (b).
  • the movable member 49 is driven by the electric drive unit 61 with respect to the moving die plate 17 in the mold closing direction.
  • the piston 257 is fixed to the piston rod 259, it moves to the side of the head side chamber 55h with respect to the cylinder member 55 together with the piston rod 259.
  • the volume of the rod side chamber 55r is expanded by moving the piston 257 to the side of the head side chamber 55h with respect to the cylinder member 55.
  • the hydraulic fluid may be appropriately replenished to the rod side chamber 55r.
  • the rod side chamber 55r and the tank 85 may be connected, and the hydraulic fluid of the tank 85 may be replenished to the rod side chamber 55r by the negative pressure generated by the expansion of the volume of the rod side chamber 55r.
  • the hydraulic fluid may be supplied from the hydraulic pressure source 83 to the rod side chamber 55r.
  • the pressure of the rod side chamber 55r may be about the tank pressure or may be larger than the tank pressure. That is, the hydraulic pressure drive unit 251 may or may not assist the extrusion by the electric drive unit 61.
  • FIG. 14 corresponds to FIG. 10.
  • the piston rod 259 moves relative to the cylinder member 55 toward the rod side chamber 55r, the piston 257 does not move together with the piston rod 259 due to the engagement of the piston rod 259, but the piston rod. By being fixed to 259, it moves together with the piston rod 259.
  • the extrusion pin 41 is a mobile type 105 in which the extrusion plate 43 located in the space 105s of the die base 105a is driven by the hydraulic drive unit 251 and the electric drive unit 61. Move relative to. Therefore, the same effect as that of the first embodiment is obtained.
  • the die casting machines 1 and 201 are examples of molding machines, respectively.
  • the mobile type 105 is an example of one type through which an extrusion pin is inserted.
  • the fixed type 103 is an example of the other type.
  • the moving die plate 17 is an example of a die plate that holds one mold.
  • the rod side chamber 55r is an example of the first cylinder chamber.
  • the head side chamber 55h is an example of a second cylinder chamber.
  • the hydraulic pressure drive unit 75 of the core device 13 is an example of a core cylinder.
  • the molding machine is not limited to the die casting machine.
  • the molding machine may be another metal molding machine, an injection molding machine, or a molding machine that molds a material obtained by mixing wood powder with a thermoplastic resin or the like. ..
  • the molding machine is not limited to the horizontal compaction horizontal injection, and may be, for example, vertical compaction vertical injection, vertical compaction horizontal injection, or horizontal compaction vertical injection.
  • the mold does not have to have a core.
  • the molding machine does not have to have a core device.
  • the core device may be a hydraulic type or an electric type instead of a hybrid type.
  • the hydraulic core device does not have to share the extruder and the hydraulic device.
  • the extrusion motor, core motor and / or other motor may be a linear motor instead of a rotary motor.
  • a transmission mechanism for transmitting rotation and a conversion mechanism for converting rotational motion into linear motion are unnecessary.
  • the rotary motor may be connected to the conversion mechanism via the transmission mechanism, or may be connected to the conversion mechanism without the transmission mechanism.
  • the electric drive unit of the extruder There may be only one electric drive unit of the extruder.
  • the electric drive unit of the extruder consists of one motor, two transmission mechanisms that transmit the rotation of one motor to two locations, and two conversion mechanisms that individually input the rotation from the two transmission mechanisms. It may be configured to have. Then, the two conversion mechanisms may be arranged symmetrically in a plane. Further, in the embodiment, the two electric drive portions are arranged symmetrically as a whole, but only the portion that applies the driving force to the movable member (the axial center of the screw mechanism) is the center of gravity of the movable member and / or It may be arranged line-symmetrically or rotationally symmetric with respect to the center of the hydraulic drive unit.
  • the division of roles between the hydraulic drive unit and the electric drive unit may be appropriately set.
  • only one of the hydraulic drive unit and the electric drive unit for example, the hydraulic drive unit
  • the hydraulic drive unit for example, the hydraulic drive unit

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
PCT/JP2021/040742 2020-11-06 2021-11-05 押出装置及び成形機 WO2022097712A1 (ja)

Priority Applications (2)

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MX2023005163A MX2023005163A (es) 2020-11-06 2021-11-05 Dispositivo de eyeccion y maquina de moldeo.
CN202180068752.XA CN116323142A (zh) 2020-11-06 2021-11-05 推出装置及成型机

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JP2020-185582 2020-11-06
JP2020185582A JP7194157B2 (ja) 2020-11-06 2020-11-06 押出装置及び成形機

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008254011A (ja) * 2007-04-03 2008-10-23 Ube Machinery Corporation Ltd 鋳造方法及びダイカストマシン
JP2009006390A (ja) * 2007-06-29 2009-01-15 Toshiba Mach Co Ltd シリンダ装置及び成形機
WO2011019454A1 (en) * 2009-08-11 2011-02-17 Milacron Llc Apparatus for ejector actuation
US20130287885A1 (en) * 2012-04-27 2013-10-31 Athena Automation Ltd. Two-platen hybrid injection molding machine
JP2020082700A (ja) * 2018-11-30 2020-06-04 住友重機械工業株式会社 射出成形機
JP2020146744A (ja) * 2019-03-15 2020-09-17 芝浦機械株式会社 ダイカストマシンおよび成形品生産方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008254011A (ja) * 2007-04-03 2008-10-23 Ube Machinery Corporation Ltd 鋳造方法及びダイカストマシン
JP2009006390A (ja) * 2007-06-29 2009-01-15 Toshiba Mach Co Ltd シリンダ装置及び成形機
WO2011019454A1 (en) * 2009-08-11 2011-02-17 Milacron Llc Apparatus for ejector actuation
US20130287885A1 (en) * 2012-04-27 2013-10-31 Athena Automation Ltd. Two-platen hybrid injection molding machine
JP2020082700A (ja) * 2018-11-30 2020-06-04 住友重機械工業株式会社 射出成形機
JP2020146744A (ja) * 2019-03-15 2020-09-17 芝浦機械株式会社 ダイカストマシンおよび成形品生産方法

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CN116323142A (zh) 2023-06-23

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