JP2022075051A - Molding machine - Google Patents

Abstract

To provide a molding machine capable of enriching a technique for driving an extrusion pin.SOLUTION: In a die casting machine 1, a mold clamping driving part 21 drives a movable die plate 17 in a mold opening/closing direction. A movable member 49 is connected to an extrusion pin 41 inserted in the mold opening/closing direction with respect to a movable mold 105, and is movable relative to the movable die plate 17 in the mold opening/closing direction. An extrusion driving part 51 is supported by the movable die plate 17, and drives the movable member 49 in a mold closing direction with respect to the movable die plate 17. A regulation part 61 regulates the movement of the movable member 49 that has reached a predetermined position in a mold opening direction in accordance with the movement of the movable die plate 17 in the mold opening direction, thereby relatively moving the movable member 49 in the mold closing direction with respect to the movable mold 105 in accordance with the further movement of the movable die plate 17 in the mold opening direction.SELECTED DRAWING: Figure 9

Description

The present disclosure relates to a molding machine. The molding machine is, for example, a die casting machine or an injection molding machine.

A molding machine is known that solidifies a molding material in a mold to produce a molded product. The mold includes a fixed mold and a mobile mold driven in the mold opening / closing direction (directions approaching and separating from the fixed mold). When the mobile 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. When 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 mobile mold and separated from the mobile mold.

In order to realize the above operation, the molding machine generally has a mold clamping device for moving the mobile mold, an injection device for filling the molding material in the cavity, and an extrusion device for driving the extrusion pin. ing. The mold clamping device has a fixed die plate for holding a fixed mold, a moving die plate for holding a mobile mold, and a drive unit for moving the moving die plate in directions toward and away from the fixed die plate. There is. The extruder generally includes a hydraulic cylinder supported by a moving die plate, and the driving force of the hydraulic cylinder drives the extrusion pin.

As a configuration for moving the extrusion pin with respect to the movable type, a configuration different from the above-mentioned general extrusion device has also been proposed (for example, Patent Documents 1 to 3 below). In Patent Document 1, the extruder has not only a hydraulic cylinder but also an electric motor. Then, in the initial stage of extrusion, the extruder drives the extrusion pin by an electric motor, and then drives the extrusion pin by a hydraulic cylinder. In Patent Documents 2 and 3, the molding machine uses a mold clamping device to move the extrusion pin with respect to the moving mold (does not have the extruder). Specifically, the molding machine regulates the movement of the extrusion pin when the mobile mold is moved to the opposite side (mold opening direction) from the fixed mold by the mold clamping device. This moves the extrusion pin to the fixed mold side relative to the mobile mold.

Japanese Unexamined Patent Publication No. 2014-18837 Japanese Patent No. 6709875 Japanese Unexamined Patent Publication No. 2012-61488

The various proposed configurations for driving the extrusion pins have their own strengths and weaknesses, respectively. On the other hand, the performance required for the configuration for driving the extrusion pin 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 desired that a new configuration is proposed as a configuration for driving the extrusion pin and that the technology is enriched.

The molding machine according to one aspect of the present disclosure drives a fixed die plate that holds a fixed mold, a movable die plate that holds a movable mold and is movable in the mold opening / closing direction, and the moving die plate in the mold opening / closing direction. A mold opening / closing drive unit, a movable member connected to an extrusion pin inserted in the mold opening / closing direction with respect to the moving mold, and a movable member capable of relative movement in the mold opening / closing direction with respect to the moving die plate, and the moving die plate. The extrusion drive unit that drives the movable member in the mold closing direction with respect to the moving die plate, and the movable member that reaches a predetermined position as the moving die plate moves in the mold opening direction. With a regulating unit that regulates the movement of the moving die plate in the mold opening direction, whereby the movable member is relatively moved in the mold closing direction with respect to the moving mold as the moving die plate is further moved in the mold opening direction. ,have.

According to the above configuration, a new molding machine for driving the extrusion pin by the mold opening / closing drive unit and the extrusion drive unit is provided, and the technique is enriched.

The side view which shows the structure of the main part of the die casting machine which concerns on 1st Embodiment. The side view which shows the structure of the die of the die casting machine of FIG. 1 and its periphery. The top view which shows the structure of the moving die plate of the die casting machine of FIG. 1 and its surroundings. 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, and 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 figure which shows the continuation of FIG. 9 (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). The figure which shows the continuation of FIG. 13 (b).

<First Embodiment>
(Outline of molding by die casting machine)
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. In 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. In FIG. 1, 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. Instead of the molded material in the molten state, 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 mobile mold 105 facing the fixed mold 103. In FIG. 1, for convenience, 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.

By moving the mobile mold 105 in the mold closing direction (the direction on the side of the fixed mold 103 with respect to the mobile mold 105; the same applies hereinafter), 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). By mold contact, a cavity 107 is formed between the fixed mold 103 and the mobile mold 105.

After closing the mold, a force (mold clamping force) for tightening the fixed mold 103 and the moving mold 105 in the opposite directions is applied to the mold 101. After molding, 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. After that, when the mobile mold 105 moves in 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. As a result, 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.

When the mold is opened to remove 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 extruding the molded product from the moving mold 105. As a result, it is pulled out from the molded product. With such 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.

(Overview of die casting machine configuration)
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.

In the present embodiment, unlike the general mold clamping device, the mold clamping device 7 is used not only for opening and closing the mold and mold clamping, but also for pushing out the molded product from the mobile mold 105. Except for the configuration and operation related to this extrusion, the configuration and operation of the mold clamping device 7 may be various configurations and operations including known configurations and operations.

Unlike a general extruder, the extruder 11 cooperates with the mold clamping device 7 to extrude a molded product from the mobile die 105. Except for the configuration and operation related to this cooperation, the configuration and operation of the extruder 11 may be various configurations and operations including known configurations and operations.

The configuration and operation of the injection device 9 and the core device 13 may be various configurations and operations including known configurations and operations. The configuration and operation of the control device 5 may be various configurations and operations including known configurations and operations, except for the above-mentioned control related to extrusion.

In the description of this embodiment, a novel configuration and / or operation may be exemplified with respect to a configuration and operation which may be a known configuration and operation. For example, the extruder 11 has a novel configuration and operation in addition to the configuration and operation related to the cooperation with the mold clamping device 7. As for the configuration and operation of the core device 13, a new one is exemplified. Further, 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.

In the following, first, the basic configuration of the mold clamping device 7 (mainly a configuration that may be the same as the known configuration), the configuration of the injection device 9, and the configuration of the control device 5 will be illustrated. Next, the configuration of the extruder 11 will be described. Next, a configuration for using the mold clamping device 7 for extrusion of a molded product from the mobile mold 105 (coordination of the mold clamping device 7 and the extrusion device 11) will be described. Next, the configuration of the new core device 13 will be described. Next, the configuration of the hydraulic pressure device that supplies the hydraulic fluid to the extruder 11 and the core device 13 will be described. After that, the operation of extruding the molded product by the mold clamping device 7 and the extrusion device 11 will be described. In the following description, the description of the configuration and operation which may be the same as the known configuration and operation will be omitted as appropriate.

(Basic configuration of mold clamping device)
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. In the tie bar 19, in a state where the mold 101 is closed (mold contact), 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. In the illustrated example, as the drive unit, 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.

The link housing 23 is fixed (at least in mold opening / closing and mold clamping) to a portion (the left end of the paper) extending rearward from the moving die plate 17 of the tie bar 19. Further, the portion of the tie bar 19 on the fixed die plate 15 side (the end on the right side of the paper surface) is fixed to the fixed die plate 15 (at least in mold opening / closing and mold clamping). That is, the link housing 23 is fixed to the fixed die plate 15 via the tie bar 19.

When a driving force that separates the link housing 23 and the moving die plate 17 from each other is applied to these members, the link housing 23 is fixed to the fixed die plate 15, so that the moving die plate 17 is transferred to the fixed die plate 15. Move towards. As a result, the mold is closed. The application of the driving force is continued even after the mold contact is made and the movement of the moving die plate 17 to the fixed die plate 15 side is restricted. Therefore, the tie bar 19 is pulled behind the moving die plate 17, and a mold clamping force is generated.

The link mechanism 25 has a plurality of links 25a to 25c. The link 25a is rotatably connected to the moving die plate 17. The link 25b is rotatably connected to the link housing 23. The links 25a and 25b are rotatably connected to each other. The link 25c is rotatably connected to the link 25b and rotatably connected to the crosshead (nut 29 described later). It should be noted that any of the above rotations is an axial rotation parallel to the paper penetration direction.

When the nut 29 moves from the side of the link housing 23 to the side of the moving die plate 17 and its driving force is transmitted to the links 25b and 25a via the link 25c, the links 25a and 25b are extended as a whole ( Each rotates so that it approaches a straight line). As a result, a driving force that separates the link housing 23 and the moving die plate 17 from each other is applied to these members. As a result, the mold is closed and the mold is fastened as described above. The mold opening is performed by moving the nut 29 from the side of the moving die plate 17 to the side of the link housing 23, contrary to the above.

In the link mechanism 25, the closer the links 25a and 25b are to a straight line, the smaller the amount of movement of the moving die plate 17 with respect to the amount of movement of the nut 29. Therefore, in mold closing and mold clamping, the mold closing can be performed at high speed and the mold clamping force can be increased. Further, when the mold is opened, the mold opening after the molded product is separated from the fixed mold 103 can be performed at high speed while increasing the force for separating the molded product from the fixed mold 103 at the initial stage. However, conversely, for example, in the link mechanism 25, when the nut 29 approaches the link housing 23, the force in the mold opening direction becomes smaller.

The mold clamping motor 27 is, for example, a rotary motor. The driving force of the mold clamping motor 27 is converted into linear motion (translational motion) by the conversion mechanism 31 that converts rotary motion into translational motion, and is transmitted to the link mechanism 25 (more specifically, the link 25c).

Although not particularly shown, a transmission mechanism for transmitting the rotation of the mold clamping motor 27 to the conversion mechanism 31 may be provided between the mold clamping motor 27 and the conversion mechanism 31. Examples of 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.

Although not particularly shown, the mold clamping motor 27 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 mold clamping motor 27 may be appropriate. For example, the mold clamping motor 27 may be a DC motor, an AC motor, an induction motor, or a synchronous motor. It may or may not have a brake. The mold clamping motor 27 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 mold clamping motor 27 may be appropriately set. As is clear from the fact that a transmission mechanism (pulley, belt mechanism, etc.) that transmits the rotation of the mold clamping motor 27 to the conversion mechanism 31 may be provided, the arrangement position and orientation of the mold clamping motor 27 are arbitrary. In the illustrated example, the mold clamping motor 27 is located behind the link housing 23 (opposite the moving die plate 17) and is supported by the link housing 23. Further, in the illustrated example, the mold clamping motor 27 is arranged coaxially with the conversion mechanism 31, and the rotation is directly input to the conversion mechanism 31 without going through the transmission mechanism.

When a transmission mechanism for transmitting the rotation of the mold clamping motor 27 to the conversion mechanism 31 is provided, the rotation of the mold clamping motor 27 may be appropriately changed and transmitted by the transmission mechanism. For example, deceleration may be done. By decelerating, the load (torque) of the mold clamping motor 27 can be reduced.

In the illustrated example, the conversion mechanism 31 is configured by a screw mechanism (for example, a ball screw mechanism or a sliding screw mechanism). The screw mechanism has a screw shaft 33 and a nut 29 screwed to the screw shaft 33. One member of the screw shaft 33 and the nut 29 (screw shaft 33 in the illustrated example) is, for example, restricted from moving in the axial direction (left-right direction on the paper surface) and is allowed to rotate around the shaft. The other member of the screw shaft 33 and the nut 29 (nut 29 in the illustrated example) is, for example, allowed to move in the axial direction and is restricted from rotating around the shaft. Therefore, when one of the members is rotated, the other member moves in the axial direction.

In the illustrated example, the conversion mechanism 31 is arranged so that the axial direction is parallel to the mold opening / closing direction. The nut 29 as the other member is connected to the link mechanism 25, and the rotation around the axis is restricted by this. More specifically, the nut 29 is rotatably connected about an axis parallel to the paper penetration direction with respect to the link 25c. The screw shaft 33 as one of the above members is supported by the link housing 23 so as to be immovable in the axial direction and rotatable around the shaft via a bearing (not shown), and the rotation of the mold clamping motor 27 is input. Will be done. Therefore, when the mold clamping motor 27 is rotated, the nut 29 moves in the mold opening / closing direction, and as described above, the moving die plate 17 is driven in the mold opening / closing direction by the link mechanism 25.

The moving die plate 17 is movable between the drive limit in the mold opening direction (a position where movement is physically restricted; the same shall apply hereinafter unless otherwise specified) and the drive limit in the mold closing direction. ing. The drive limit of the movable die plate 17 is, for example, the drive limit of a guide (not shown) that movably supports the movable die plate 17, and / or the drive limit of the mold clamping drive unit 21 (for example, the screw shaft 33 of the nut 29). It is defined by the drive limit with respect to the drive limit or the drive limit of the link mechanism 25). In the mold closing, the moving die plate 17 is restricted from moving in the mold closing direction by the moving mold 105 coming into contact with the fixed mold 103 before reaching the drive limit in the mold closing direction. In the mold opening, the moving die plate 17 may or may not be driven to the drive limit in the mold opening direction.

(Injection device)
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. With the molding material arranged in the sleeve 35, 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.

In the illustrated example, 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). However, 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.

(Control device)
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. By executing the program stored in the ROM and / or the external storage device by the CPU, various functional units that perform various operations (including control) are constructed. Further, 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.

Under the control of the control device 5, for example, the series of operations (molding cycle) described above for manufacturing a molded product is repeatedly performed. To be confirmed, 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.

(Extruder)
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.

The mobile 105 has a space 105s inside for accommodating a part of the extruder 11. The die base 105a constituting the space 105s is referred to as a part of the mobile type 105 in the present disclosure. 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. An extrusion drive unit 51 that generates a driving force for driving the extrusion pin 41 and applies the driving force to the movable member 49. 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 a rear end, for example. The extrusion pin 41 is inserted into the movable mold 105 (more strictly, a portion in front of the die base 105a) in the mold opening / closing direction, and is movable relative to the mobile mold 105 in the insertion direction. 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, for example, with a full stroke. 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). 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 moving die plate 17, 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 contacting the movable mold 105 with 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) in the mold closing direction. Limits may be specified. This drive limit may or may not define the advance limit of the extrusion pin 41. Further, 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, for example, 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. Unlike 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. For example, 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. In theory, the number of extrusion rods 47 may be one. Further, 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 arrangement position of the extrusion rod 47, the connection mode with the mold clamping device 7 described later, and the like. In the illustrated example, the movable member 49 has a substantially flat plate shape. 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 opening / closing direction of the mold. The guide 53 is fixed to the moving die plate 17, for example, and has an axial shape extending in the opening / closing direction of the mold. 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. Further, 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.

(Extrusion drive unit)
The extrusion drive unit 51 has a hydraulic cylinder. In the description of the embodiment, the extrusion drive unit 51 may be used as a term to refer to the hydraulic cylinder (extrusion cylinder) for extrusion. The hydraulic cylinder 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.

The inside of the cylinder member 55 is divided by a 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). By supplying the hydraulic fluid (for example, oil) to one of the two cylinder chambers, the piston 57 moves relative to the cylinder member 55 toward the other cylinder chamber. For example, in the illustrated example, by supplying the hydraulic fluid to the rod side chamber 55r, the piston 57 moves relative to the cylinder member 55 toward the head side chamber 55h. By transmitting this relative movement to the moving die plate 17 and the movable member 49, the extrusion pin 41 can be moved relative to the moving die 105.

The extrusion drive unit 51 is different from the hydraulic cylinder of a general extrusion device, and the other of the two cylinder chambers (head side chamber 55h in the illustrated example) is open to the atmosphere. That is, the extrusion drive unit 51 is configured to generate a driving force for the piston 57 only in one direction (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 extrusion 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. This is because it is not used and the movement of the piston 57 in the other direction (in the illustrated example, the direction from the head side chamber 55h to the rod side chamber 55r) is performed by the driving force from the mold clamping device 7.

The configuration for opening to the atmosphere may be appropriate. In the illustrated example, 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. In addition, while the end face is formed, an opening (port) may be formed at an appropriate position.

In addition, unlike the present embodiment, the extrusion drive unit may be configured such that both of the two cylinder chambers are filled with the liquid. In this case, both of the two cylinder chambers may be supplied with a hydraulic fluid (pressure applied) and used to drive the piston 57. Alternatively, one cylinder chamber (head side chamber 55h in this embodiment) may be merely a substitute for a part or all of the tank. Further, in the cylinder chamber (head side chamber 55h) that is open to the atmosphere as in the present embodiment, 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 extrusion drive unit 51 is different from the hydraulic cylinder of a general extrusion device, 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 (extruded drive unit 51 from another viewpoint) 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.

In the extrusion drive unit 51, unlike the hydraulic cylinder of a general extrusion device, the piston 57 and the piston rod 59 are not fixed. 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. On one side thereof, 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). In the following description, the former cylinder chamber may be referred to as a first cylinder chamber, and the latter cylinder chamber may be referred to as a second cylinder chamber.

Specifically, for example, 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.

With such a configuration, for example, when the hydraulic fluid is supplied to the rod side chamber 55r and the piston 57 is moved to the side of the head side chamber 55h, the piston rod 59 can be moved to the side of the head side chamber 55h by the piston 57. can. Further, for example, when the piston rod 59 moves to the side of the head side chamber 55h by a driving force from the outside, the piston 57 can be kept stopped. By this stop, for example, it is possible to eliminate the need to supply the hydraulic fluid to the rod side chamber 55r whose volume increases with the movement of the piston 57.

As can be understood from the above description, the rod side chamber 55r is sealed. In order to improve the airtightness, packing such as an O-ring may be provided at an appropriate position. For example, 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. For example, when 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 extrusion drive unit 51 (hydraulic 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 extrusion 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. Cylinder. 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 extrusion drive unit 51.

The position and orientation of the extrusion drive unit 51 for realizing the above operation can be various.

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 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. In this configuration, as shown in parentheses in the above description, 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). As a result, 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.

Although not shown in particular, examples of the position and orientation of the extrusion drive unit 51 other than the illustrated example include the following embodiments.

The orientation of the extrusion drive unit 51 (orientation 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. , The piston rod 59 may be fixed to the moving die plate 17. In this embodiment, 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 same applies.). The first direction in this embodiment is the same mold opening direction (left side of the paper) as in the illustrated example. That is, 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. In this embodiment, as in the embodiment, 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. Further, 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 extrusion 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 17. The piston rod 59 may be fixed to the movable member 49. In this aspect, 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. In this embodiment, 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. Further, 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 orientation of the extrusion drive unit 51 (orientation 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 placed on the movable member. 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 49 or via the outside of the movable member 49. In this aspect, 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. In this aspect, 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. Further, 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 extrusion drive unit 51 can be variously arranged and oriented as described above, but the following description may be performed on the premise of the arrangement and orientation and the like of the extrusion drive unit 51 in the illustrated example for convenience. be.

The extrusion 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 the cylinder member 55 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 side chamber 55h with respect to the head side chamber 55h. 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.

In the illustrated example, the extrusion pin 41 is located in the retracted limit when the piston 57 is located in the drive limit towards the rod side chamber 55r. 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.

When a stopper is provided that defines the drive limit of the piston 57 when the extrusion pin 41 advances (the drive limit to the side of the head concubine 55h in the illustrated example), and by extension, the stroke of the piston 57 is specified. The stroke may be shorter than, for example, the stroke of the extrusion pin 41. For example, the former may be 1/2 or less, 1/5 or less, or 1/10 or less with respect to the latter.

(Extrusion of molded products by mold clamping device)
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.

As described above, the mold clamping device 7 can move the moving die plate 17 in the mold opening / closing direction. When the die casting machine 1 moves the moving die plate 17 in the mold opening direction by the mold clamping device 7, the die casting machine 1 restricts the movement of the extrusion pin 41 in the mold opening direction. As a result, the extrusion pin 41 moves in the mold closing direction relative to the moving die plate 17. That is, the extrusion pin 41 moves relative to the movable mold 105 toward the fixed mold 103. Specifically, it is as follows.

As described above, the extrusion pin 41 is connected to the movable member 49 via the extrusion plate 43 and the extrusion rod 47. The die casting machine 1 has a regulating unit 61 that regulates the movement of the movable member 49 in the mold opening / closing direction. By restricting the movement of the movable member 49 in the mold opening / closing direction, the movement of the extrusion pin 41 in the mold opening / closing direction is restricted.

The regulating unit 61 has, for example, a contact member 23a and a coupling device 63. The contact member 23a abuts on the movable member 49 from the mold opening direction to the mold closing direction when the movable member 49 reaches a predetermined position as the moving die plate 17 moves in the mold opening direction. The movement of the movable member 49 in the mold opening direction is restricted. The coupling device 63 connects and disconnects the fixed member (link housing 23 in the illustrated example) and the movable member 49 at the predetermined position, and releases the connection, and the coupling causes the movable member 49 to open in the mold opening direction. Regulate both the movement of the mold and the movement in the mold closing direction.

The contact member 23a is a member that is immovable (at least when the mold is opened). In the illustrated example, the contact member 23a is a part of the link housing 23. For example, the link housing 23 has a plate-shaped main body portion 23b facing the moving die plate 17 with a link mechanism 25 (not shown in FIG. 3) interposed therebetween, and an extension extending from the main body portion 23b to the moving die plate 17 side. It has a portion 23c. The contact member 23a is a portion provided at the end of the extending portion 23c on the moving die plate 17 side. The contact member 23a is made immovable by, for example, the link housing 23 being connected to the fixed die plate 15 by the tie bar 19.

The shapes and dimensions of the extending portion 23c and the contact member 23a may be appropriately set. In the illustrated example, the extending portion 23c is located, for example, outside the arrangement region of the linkage 25. For example, the extending portion 23c may be located laterally to the link mechanism 25. The extending portion 23c may be a shaft-shaped portion or a plate-shaped portion. Further, in the illustrated example, the contact member 23a has a shape extending from the extending portion 23c toward the central axis side of the die casting machine 1 in the top view (and / or the side view). The shape may be, for example, substantially a plate shape facing a portion on the outer peripheral side of the movable member 49 in the mold opening / closing direction. An elastic member for cushioning the impact may be arranged on the surface of the abutting member 23a on the movable member 49 side.

The coupling device 63 is, for example, one of the two members (link housing 23 in the illustrated example) and the movable member 49 (in the illustrated example) that are immovable (at least when the mold is opened). It is supported by the link housing 23) and is connected to and disconnected from the other member (movable member 49 in the illustrated example). The connection here refers to the regulation of relative movement in the mold opening / closing direction. That is, the coupling device 63 does not have to restrict the relative movement in the direction intersecting the mold opening / closing direction. The regulation of relative movement may be realized by an appropriate method, for example, by engagement (illustrated example), friction and / or adsorption (electromagnetic adsorption or vacuum adsorption, etc.).

In the illustrated example, the coupling device 63 has an engaging member 63a and an actuator 63b for driving the engaging member 63a. The engaging member 63a is between an engaging position in which the movable member 49 is engaged with the engaged portion 49a in the mold opening / closing direction and a disengaging position (position shown in the drawing) where the engagement is released. It is movably supported by the link housing 23 (more specifically, the contact member 23a). This support may be via the actuator 63b, as in the illustrated example. The actuator 63b moves the engaging member 63a between the engaging position and the disengaging position.

The specific shapes and dimensions of the engaging member 63a and the engaged portion 49a may be appropriately set. In the illustrated example, the engaged portion 49a is a recess formed on the side surface of the movable member 49. Then, the engaging member 63a is inserted into the concave engaged portion 49a to engage with the engaged portion 49a in the mold opening / closing direction. Although not particularly shown, contrary to the above, the concave engaging member 63a may be engaged so as to cover the convex engaged portion 49a.

The configuration of the actuator 63b may be appropriate. For example, the actuator 63b may be a pneumatic cylinder, a hydraulic cylinder or a linear motor. These actuators may include a spring that urges the engaging member 63a to the disengagement position. The engaging member 63a may be part of an actuator, such as being composed of a piston rod of a pneumatic cylinder or a hydraulic cylinder.

In the illustrated example, the movement of the movable member 49 in the mold opening direction is restricted by the contact member 23a and the coupling device 63. Therefore, the contact member 23a may be omitted. Further, conversely, the coupling device 63 may be configured to restrict only the movement of the movable member 49 in the mold closing direction. However, in this case, the combination of the contact member 23a and the coupling device 63 may be regarded as a coupling device that regulates movement in both the mold opening direction and the mold closing direction.

Various configurations of the coupling device using engagement are possible in addition to the configurations shown in the figure. For example, the coupling device has an engagement position that engages with the movable member 49 in the mold opening direction by swinging around a rotation axis orthogonal to the mold opening / closing direction, and a hook-shaped engagement that retracts from the engagement position. It may have a member. Further, for example, the movable member 49 is provided with a protruding portion protruding in the mold opening direction or the mold closing direction, and a groove extending around the axis is provided in a part of the protruding portion (a small diameter portion is provided). It may have a substantially C-shaped engaging member that is fitted into (surrounds a small diameter portion).

The extrusion pin 41 (movable member 49) is restricted from moving in the mold opening direction before the moving die plate 17 reaches the drive limit in the mold opening direction, and is subsequently moved in the mold opening direction by the moving die plate 17. It advances relative to the mobile 105. The drive limit in the mold opening direction of the moving die plate 17 may or may not specify the advance limit of the extrusion pin 41.

(Core device)
Returning to FIG. 1, 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. Further, 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. However, 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. In the illustrated example, the mounting portion 65 has a rod-shaped member extending upward from the upper surface of the mobile type 105, although the reference numeral is omitted. The core device 13 is fixed to the upper end of the rod-shaped member.

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. In these figures, 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. Further, 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. The driving force of the electric drive unit 73 and / or the hydraulic drive unit 75 is transmitted to the drive member 71, and the drive member 71 moves with respect to the support member 69, so that the core 109 has the fixed type 103 and the movable type 105. It is put in and out between. The specific configuration of each part of the core device 13 is, for example, as follows.

The shape and dimensions of the support member 69 may be appropriately set. In the illustrated example, the support member 69 is configured to also serve as a cylinder member of the hydraulic pressure drive unit 75 (hydraulic cylinder). Specifically, 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. Unlike the front end portion 69b, 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. In the illustrated example, 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. Further, in the illustrated example, 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. For example, 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 (from another viewpoint, the forward limit and the backward limit) may be appropriately set. For example, 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. Further, for example, although not particularly shown, 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. Further, the forward limit and / or the backward limit are defined by the front end and the rear end (the front end and the rear end of the movable range of the nut 79b described later) in the range where the thread groove of the screw shaft 79a described later is cut. May be good.

(Electric drive unit of core device)
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.

As for the configuration of the core motor 76, the description of the configuration of the mold clamping motor 27 described above may be incorporated as long as there is no contradiction or the like. Of course, since the roles of the two are different, the specific configuration and performance are different between the two. The arrangement and orientation of the core motor 76 may be appropriately set. In the illustrated example, 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. .. As a result, for example, the electric drive unit 73 can be shortened.

The transmission mechanism 77 is composed of, for example, a pulley / belt mechanism. Specifically, 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. In the illustrated example, 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.

As for the configuration of the conversion mechanism 79 of the core device 13, the description of the configuration of the conversion mechanism 31 of the mold clamping device 7 may be incorporated as long as there is no contradiction or the like. At this time, the word of the screw shaft 33 is replaced with the word of the screw shaft 79a, and the word of the nut 29 is replaced with the word of the nut 79b. Of course, since the conversion mechanism 79 and the conversion mechanism 31 have different roles, their specific configurations and performances are different.

In the illustrated example, 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 because the drive member 71 is restricted from rotating 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 specific arrangement positions of the nut 79b and the screw shaft 79a may be appropriately set. In the illustrated example, 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. It is movable to and from a reduced length position (FIG. 6) that accommodates the shaft 79a. In other words, the drive member 71 is provided concentrically with respect to the conversion mechanism 79. With such an arrangement, for example, the core device 13 is downsized.

The stroke of the nut 79b (in another aspect, the forward limit or the backward limit) is defined by the conversion mechanism 79 alone, for example, by the length of the range in which the thread groove is cut in the thread shaft 79a. However, by defining the stroke of the drive member 71 by a stopper or the like, the forward limit and / reverse limit of the nut 79b fixed to the drive member 71 may be defined.

Although not particularly shown, 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. Instead of the screw mechanism, another conversion mechanism (for example, a rack and pinion mechanism) may be provided.

(Hydraulic drive unit of core device)
The hydraulic pressure drive unit 75 is composed of, for example, a hydraulic pressure cylinder. In the description of the embodiment, the hydraulic pressure drive unit 75 may be used as a term to refer to the hydraulic cylinder for the core (core cylinder). Specifically, 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. 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. However, 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.

Therefore, for example, in a state where the engaging portion 71b is not engaged with the piston 81, 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. In the illustrated example, the forward limit (lower drive limit) of the piston 81 is defined by the front end 69b as a stopper, as shown in FIG. As shown in FIGS. 4 and 6, 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. For example, 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. Note that, unlike the illustrated example, 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, and 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 91 described later).

(Operation of core device)
The operation of the core device 13 is, for example, as follows.

Before the start of mold closing, the drive member 71 (nut 79b in another aspect) is located in the retracted limit (upper drive limit in the illustrated example), for example, as shown in FIG. As a result, the core 109 is retracted from between the fixed type 103 and the mobile type 105. Since 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. In another aspect, the anterior chamber 69d may be connected to either the hydraulic pressure source 83 or the tank 85. In the illustrated example, the piston 81 is located in the retreat limit. Further, the front chamber 69d is connected to the tank 85.

Before the mold closing is completed (for example, before the mold closing is started or the mold is being closed), the control device 5 drives the core motor 76 to move the drive member 71 to the forward limit as shown in FIG. As a result, the core 109 is arranged between the fixed type 103 and the mobile type 105. Further, during the movement of the drive member 71 to the forward limit, the engaging portion 71b of the drive member 71 engages with the piston 81 from the rear. As a result, the driving force of the core motor 76 is applied to the piston 81, and the piston 81 also moves to the forward limit. At this time, 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.

As described above, when the mold clamping and injection are completed and the molding material in the cavity 107 is solidified, the mold is opened and then the extrusion is performed. After the start of mold opening (for example, during mold opening or after the completion of mold opening) and before extrusion, 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. And the hydraulic pressure drive unit 75 is controlled.

Specifically, first, 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. As a result, 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. As a result, 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.

When the piston 81 is driven by the hydraulic pressure drive unit 75 as described above, 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. In this case, either 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. For example, 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. Further, the electric drive unit 73 hardly applies 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. Further, depending on the configuration of the conversion mechanism 79, the core motor 76 may be in a torque-free state.

When the piston 81 moves to the backward limit, 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. To the retreat limit. As a result, the core 109 continues to retreat and retreats from between the fixed type 103 and the mobile type 105. When 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.

As described above, since the core device 13 is a hybrid type, it is easy to apply a large force to the core 109, for example, 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). ..

Further, in the core device 13, 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 portion 73. Thereby, for example, when the core 109 is separated from the molded product, a large driving force can be obtained by utilizing the hydraulic pressure driving unit 75. On the other hand, the amount of the hydraulic fluid supplied to the front chamber 69d can be reduced. As a result, the hydraulic pressure device 67 can be miniaturized.

(Hydraulic device)
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 extrusion 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. In the illustrated example, the pump 89 and the tank 85 are shared by the extruder 11 and the core device 13. The hydraulic pressure device 67 has the above-mentioned core valve 87. Further, 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. However, 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. Therefore, 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 a pressure close to the atmospheric pressure.

The extrusion valve 91, for example, 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, and 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.

As shown in FIG. 2, the hydraulic device 67 may be entirely mounted (supported) on the moving die plate 17. In FIG. 2, 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 components other than the flow path of the hydraulic 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. In the illustrated example, the unit 67a is located below the back surface of the moving die plate 17. However, 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 extrusion drive unit 51. In the embodiment in which the cylinder member 55 of the extrusion drive unit 51 is fixed to the movable member 49 as in the present embodiment, 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. Partly composed of flexible members (eg hoses).

In addition, unlike the present embodiment, in the embodiment in which the cylinder member 55 and the moving die plate 17 are fixed, 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. Further, unlike the illustrated example, 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.

Although not shown in FIG. 2, a flow path 67c (FIG. 7 (a)) connecting the unit 67a (core valve 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 mobile 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.

(Modification example of hydraulic device)
FIG. 7B is a circuit diagram showing the configuration of the hydraulic pressure device 67A according to the modified example. In addition, here, 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.

In the hydraulic pressure device 67A, 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. For example, 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. In the illustrated example, 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.

(Sensors, etc.)
Although not particularly shown, 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.

An example of the sensor as described above is given. For example, a position sensor for detecting the position of the moving die plate 17 with respect to the base 14 and a position sensor for detecting 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) are provided. May be done. Specific embodiments of the position sensor include, for example, a linear encoder or a laser length measuring instrument. In addition to or in place of the position sensor that detects the position of the drive target (moving die plate 17 or movable member 49), 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 mold clamping motor 27, and a position sensor that detects the position of the piston rod 59 with respect to the cylinder member 55. Further, 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 mold clamping motor 27 and a sensor that detects the pressure in the cylinder chamber of the hydraulic cylinder.

(Extrusion of molded product)
8 (a) to 10 are schematic views for explaining the operation of extruding the molded product by the extruder 11 and the mold clamping device 7. 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.

In this state, the moving die plate 17 is located at a mold closed position where the moving mold 105 abuts on the fixed mold 103. The movable member 49 is separated from the contact member 23a of the link housing 23 in the mold closing direction. The relative position of the extrusion pin 41 with respect to the moving die 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. For example, 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.

Further, in this state, the control device 5 controls the mold clamping drive unit 21 (mold clamping electric motor 27) so that the driving force is applied to the moving die plate 17 in the mold closing direction. The control device 5 has stopped the supply of the hydraulic fluid from the hydraulic pressure device 67 to the extrusion 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.

Next, as shown in FIG. 8 (b), mold opening is performed.

Specifically, the control device 5 rotates the mold clamping motor 27 in the direction opposite to that at the time of mold clamping. As a result, 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. At this time, the injection device 9 may push the molded product toward the mobile type 105 by the plunger 37.

As the moving die plate 17 moves in the mold opening direction, the movable member 49 and the extrusion drive unit 51 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. 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 an extrusion valve 91, for example, in order to reduce the possibility that the piston 57 and the cylinder member 55 move relative to each other.

After that, 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. When it is determined that 17 has reached a predetermined position, the mold clamping motor 27 is stopped, and by extension, the moving die plate 17 is stopped. At this time, 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. This stop position may be a position where the movable member 49 abuts on the contact member 23a of the link housing 23 (example in the figure), or may be a position in the mold closing direction (right side of the paper). ..

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.

Next, as shown in FIG. 9A, the molded product 111 is extruded by the extruder 11.

Specifically, 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.

By supplying the hydraulic fluid to the rod side chamber 55r, 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. Due to this relative movement, the movable member 49 moves relative to the moving die plate 17 in the mold closing direction, and eventually the extrusion pin 41 moves relative to the moving mold 105 toward the fixed mold 103. Then, the molded product 111 that was in close contact with the mobile mold 105 is pushed by the extrusion pin 41 and separated from the mobile mold 105 (releases from the mold).

When supplying the hydraulic fluid to the rod side chamber 55r, 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. Pressure control may be performed to control the 93 or flow control valve) and / or the hydraulic pressure device 67 (eg, a hydraulic pressure device 67 (eg,) based on the detection value of a position sensor (not shown) that detects the position of the extrusion pin 41 with respect to the mobile 105. Position control and / or speed control for controlling the pump motor 93 or the flow control valve) may be performed.

When the predetermined condition is satisfied, 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 drive of the extrusion pin 41 by the extrusion 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. Further, at the same time as or prior to the control of the hydraulic pressure device 67, the piston 57 may come into contact with a stopper (not shown) provided on the cylinder member 55 and stop.

The predetermined condition when the drive of the extrusion pin 41 by the extrusion drive unit 51 is terminated is, for example, a predetermined movement amount of the extrusion pin 41 (molded product 111 from another viewpoint) detected by a position sensor (not shown). It may be considered that the distance 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.

In FIG. 9A, in comparison with FIG. 8B, the position of the movable member 49 is maintained, and the moving die plate 17 is moving in the mold opening direction. Normally, the mass of the movable die plate 49 is smaller than the mass of the moving die plate 17, so that the position of the moving die plate 17 is maintained and the movable member 49 may move in the mold closing direction, contrary to the drawing.

However, the moving die plate 17 may be moved in the mold opening direction by the mold clamping device 7 so that the position of the movable member 49 is maintained as in the illustrated example. At this time, the movement of the movable member 49 in the mold opening direction may be restricted by the contact member 23a of the link housing 23. Then, the extrusion pin 41 may be provided with the driving force of the mold clamping device 7 in addition to the driving force of the extrusion driving unit 51. Alternatively, the speed of the moving die plate 17 may be set to be equal to or lower than the speed of the piston 57 so that the driving force of the mold clamping device 7 is not applied to the extrusion pin 41.

In the above description, after the moving die plate 17 is stopped, the extrusion pin 41 is driven by the extrusion device 11. However, when the moving die plate 17 is being moved in the mold opening direction (from another viewpoint, before the moving die plate 17 reaches the position shown in FIG. 8B), the extrusion pin 41 is driven by the extruder 11. May be good.

Next, as shown in FIG. 9B, the molded product 111 is extruded by the mold clamping device 7.

Specifically, the control device 5 controls the coupling device 63 so as to connect the link housing 23 and the movable member 49, as schematically shown by the arrow y1. However, at this stage, the coupling by the coupling device 63 is not performed, and the movement of the movable member 49 in the mold opening direction may be restricted only by the contact member 23a of the link housing 23.

Then, the control device 5 controls the mold clamping drive unit 21 (mold clamping electric motor 27) so as to move the moving die plate 17 further in the mold opening direction from the above-mentioned stop position. As a result, the movable member 49 moves relative to the moving die plate 17 in the mold closing direction, and eventually the extrusion pin 41 moves relative to the moving mold 105 toward the fixed mold 103. Then, 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. At this time, the control device 5 may perform position control and / or speed control for controlling the mold clamping drive unit 21 based on the position of the extrusion pin 41 with respect to the moving mold 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 moving die plate 17 moves in the mold opening direction while the movement of the movable member 49 in the mold opening direction is restricted as described above, the piston rod 59 moves in the mold opening direction with respect to the cylinder member 55. Move relative to each other. Here, as described above, 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. From another aspect, 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.

After that, when a predetermined condition is satisfied, the control device 5 controls the mold clamping drive unit 21 so as to stop the movement of the moving die plate 17. That is, the control device 5 stops driving the mold clamping motor 27. 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. From another point of view, it may be assumed that the moving die plate 17 has reached a predetermined position. The predetermined position may be the drive limit in the mold opening direction of the moving die plate 17, or may be a position in front of the drive source.

The distance d1 and the distance d2 may be set as appropriate. For example, 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. In this case, the distance d1 may be as short as possible. For example, the distance d1 may be 5 mm or less. On the other hand, 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, for example, shorter than the distance d2, and may be 1/2 or less, 1/5 or less, or 1/10 or less of the distance d2.

Next, as shown in FIG. 10, the extrusion pin 41 (in another viewpoint, the moving die plate 17) is returned to the initial position. In other words, the preparation for the next cycle is made.

Specifically, the control device 5 has the coupling device 63 and the mold clamping drive so as to move the moving die plate 17 in the mold closing direction in a state where the movement of the movable member 49 in the mold closing direction is restricted by the coupling device 63. The unit 21 is controlled. As a result, the movable member 49 moves relative to the moving die plate 17 in the mold opening direction. As a result, the extrusion pin 41 fixed to the movable member 49 moves relative to the movable mold 105 fixed to the moving die plate 17 on the opposite side of the fixed mold 103. As a result, the extrusion pin 41 returns to the initial position. The coupling by the coupling device 63 is performed at an appropriate time after the moving die plate 17 reaches a connectable position (after FIG. 8B) and before the return of the extrusion pin 41 is started. It's okay.

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).

When the piston 57 moves relative to the cylinder member 55 in the mold closing direction, the hydraulic fluid discharged from the rod side chamber 55r whose volume is reduced is discharged to, for example, the tank 85. When 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, a position sensor (not shown) for detecting the relative position of the extrusion pin 41 with respect to the movable die 105 (in another viewpoint, the relative position of the movable member 49 with respect to the moving die plate 17), and / or the moving die plate 17. A position sensor (not shown) that detects the position of the extruded pin 41 with respect to the base 14 detects the return of the extrusion pin 41 (in another viewpoint, the moving die plate 17) to the initial position. Then, when the control device 5 detects the return to the initial position, the mold clamping motor 27 is stopped, and as shown by the arrow y2, the coupling device is such that the link housing 23 and the movable member 49 are disconnected. 63 is controlled.

As described above, the molding machine (die casting machine 1) according to the present embodiment includes a fixed die plate 15, a moving die plate 17, a mold opening / closing drive unit (mold clamping drive unit 21), a movable member 49, and an extrusion drive. It has a unit 51 and a regulation unit 61. The fixed die plate 15 holds the fixed mold 103. The moving die plate 17 holds the moving mold 105 and can move in the mold opening / closing direction. The mold clamping drive unit 21 drives the moving die plate 17 in the mold opening / closing direction. The movable member 49 is connected to an extrusion pin 41 inserted in the mold opening / closing direction with respect to the moving mold 105, and can move relative to the moving die plate 17 in the mold opening / closing direction. The extrusion drive unit 51 is supported by the moving die plate 17, and drives the movable member 49 with respect to the moving die plate 17 in the mold closing direction. The regulating unit 61 regulates the movement of the movable member 49 that has reached a predetermined position (the position that abuts on the abutting member 23a) in the mold opening direction as the moving die plate 17 moves in the mold opening direction. As the moving die plate 17 is further moved in the mold opening direction, the movable member 49 is relatively moved in the mold closing direction with respect to the moving mold 105.

Therefore, a new die casting machine 1 for driving the extrusion pin 41 by both the extrusion drive unit 51 and the mold clamping drive unit 21 is provided, and the technique is enriched. In such a die casting machine 1, since extrusion is performed by the mold clamping drive unit 21, the load on the extrusion drive unit 51 can be reduced as compared with the embodiment in which extrusion is performed only by the extrusion drive unit 51. As a result, for example, the extrusion drive unit 51 can be miniaturized, or the amount of the hydraulic fluid can be reduced when the extrusion drive unit 51 is a hydraulic type. On the other hand, the advantages of the extrusion drive unit 51 can be utilized. As an advantage thereof, for example, unlike the mold clamping drive unit 21, the extrusion drive unit 51 does not need to move the moving die plate 17, and the drive force can be directly applied to the extrusion pin 41.

The mold opening / closing drive unit (mold clamping drive unit 21) may have a mold opening / closing drive source (mold clamping motor 27), a link housing 23, and a link mechanism 25. The link mechanism 25 may be connected to the link housing 23 and the moving die plate 17, and may transmit the driving force of the mold clamping motor 27 to the moving die plate 17.

That is, the mold clamping device 7 may be a toggle type. In this case, as described above, the mold clamping device 7 can apply a large driving force to the moving die plate 17 when the moving die plate 17 is located at or near the mold closing position (FIG. 8A). When the moving die plate 17 is located at or near the mold opening position (FIG. 9B), the driving force applied to the moving die plate 17 becomes smaller. As a result, for example, it becomes difficult to obtain a force (force to release the molded product 111) that separates the molded product 111 that is in close contact with the mobile mold 105 from the mobile mold 105. However, in the present embodiment, instead of or in addition to the driving force of the mold clamping motor 27, the driving force of the extrusion drive unit 51 can be applied to the extrusion pin 41. As a result, it becomes easy to obtain a force for releasing the molded product 111. That is, it is highly useful to use the mold clamping drive unit 21 and the extrusion drive unit 51 in combination for extrusion.

The mold opening / closing drive source may have a mold opening / closing motor (mold clamping motor 27) that generates a driving force transmitted to the moving die plate 17.

In other words, the mold clamping device 7 may be an electric type. In this case, for example, it is advantageous in reducing energy consumption and reducing the hydraulic fluid used in the die casting machine 1. In particular, when the extrusion drive unit 51 is a hydraulic cylinder as in the present embodiment, energy consumption can be reduced by reducing the load on the extrusion drive unit 51 by the mold clamping device 7. Further, for example, the head side chamber 55h is moved by the mold clamping device 7 to move the extrusion pin 41 to the mold opening direction with respect to the moving mold 105 and to move the piston 57 of the extrusion drive unit 51 to the rod side chamber 55r side. It can be opened to the atmosphere to reduce the amount of hydraulic fluid.

The extrusion drive unit 51 may have a hydraulic extrusion cylinder that produces a driving force transmitted to the movable member 49.

In other words, the extruder 11 may be a hydraulic type. In this case, for example, the extrusion drive unit 51 can obtain a large driving force in a small size and / or at a low cost as compared with an embodiment configured by an electric motor (the embodiment may also be included in the technique according to the present disclosure). It's easy. Further, for example, when the mold clamping device 7 is an electric type, the mold clamping device 7 has the effect of reducing the load on the extruder 11 and reducing the amount of the hydraulic fluid. That is, it is highly useful to use the mold clamping drive unit 21 and the extrusion drive unit 51 in combination for extrusion.

The restricting unit 61 may restrict the movement of the movable member 49 located at the predetermined position (position abutting on the abutting member 23a) in the mold closing direction (may have a coupling device 63). As a result, the regulating unit 61 moves the moving die plate 17 in the mold closing direction after the further movement (movement from FIG. 9A to FIG. 9B) in the mold opening direction of the moving die plate 17. With the movement to (movement from FIG. 9B to FIG. 10), the movable member 49 may be relatively moved in the mold opening direction with respect to the moving mold 105. The extrusion cylinder (extrusion drive unit 51) may have a cylinder member 55, a piston 57, and a piston rod 59. The cylinder member 55 may be fixed to one member (movable member 49) of the movable member 49 and the moving die plate 17. The piston 57 may divide the inside of the cylinder member 55 into a first cylinder chamber (rod side chamber 55r) and a second cylinder chamber (head side chamber 55h). The piston rod 59 may extend from the inside of the cylinder member 55 to the outside of the cylinder member 55, and may be fixed to the other member (moving die plate 17) of the movable member 49 and 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 movable member 49 is driven with respect to the moving die plate 17 in the mold closing direction. The head side chamber 55h may be open to the atmosphere.

In this case, for example, the above-mentioned effect of reducing the hydraulic fluid of the extrusion drive unit 51 is achieved. 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 mold clamping device 7, it is not necessary to fill the head side chamber 55h with the hydraulic fluid. Can be done.

The piston rod 59 may have a rod body 59a and an engaging portion 59b. The rod body 59a may be slidably inserted into the piston 57 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.

In this case, as shown in FIG. 9A, 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. By moving the 59 to the side of the head side chamber 55h, the extrusion pin 41 can be moved to the side of the fixed mold 103 with respect to the moving mold 105. After that, as shown in FIG. 9B, when the extrusion pin 41 was moved in the mold closing direction with respect to the movable mold 105 by the mold clamping drive unit 21, the piston 57 was stopped with respect to the cylinder member 55. As it is, the piston rod 59 can be moved to the side of the head side chamber 55h with respect to the cylinder member 55.

Therefore, for example, as compared with the embodiment in which the extrusion pin 41 can be driven by the extrusion drive unit 51 and the piston 57 and the piston rod 59 are fixed (see the second embodiment described later), the rod side chamber 55r The amount of hydraulic fluid supplied to the piston can be reduced. When 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 to the piston 57 are combined, for example, the effect of reducing the required amount of the hydraulic fluid in the extrusion drive unit 51 is dramatically improved. The configuration in which the piston rod 59 is relatively moved 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 molding machine (die casting machine 1) may further have a hydraulic pressure source 83 that supplies a hydraulic fluid to the extrusion cylinder (extrusion drive unit 51). 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 extrusion drive are performed. Relative movement with the portion 51 is roughly based on the amount of movement of the moving die plate 17. On the other hand, in the present embodiment, the hydraulic pressure source 83 and the extrusion 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 extrusion drive 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 extrusion drive unit 51 can be reduced.

The molding machine (die casting machine 1) is supported by a moving die plate 17 (via a mobile die 105) and further has a core device 13 for inserting and removing a core 109 between the fixed die 103 and the mobile die 105. It's okay. 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 pressure source 83, which is supported by the moving die plate 17 and supplies the hydraulic fluid to the extrusion drive unit 51, may also supply the hydraulic fluid to the hydraulic pressure drive unit 75.

In this case, since the hydraulic pressure source 83 is shared by the extrusion drive unit 51 and the hydraulic pressure drive unit 75, for example, the hydraulic pressure device 67 can be downsized. Further, since the hydraulic pressure drive unit 75 is supported by the moving die plate 17, the hydraulic pressure is compared with the embodiment in which the hydraulic pressure source 83 is directly supported by the base 14 as in the extrusion drive unit 51. The flow path (for example, the flow path 67c) connecting the source 83 and the hydraulic pressure drive unit 75 can be shortened. Further, the flow path may 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 core device 13 may include a core motor 76 that generates a driving force transmitted to the core 109, in addition to the core cylinder (hydraulic pressure drive unit 75). The hydraulic pressure source 83 that supplies the hydraulic fluid to the extrusion drive unit 51 may also supply the hydraulic fluid to the hydraulic pressure drive unit 75.

That is, the core device 13 may be a hybrid type. In this case, for example, the hydraulic fluid required for the core device 13 can be reduced. From another viewpoint, for example, the hydraulic pressure device 67 shared by the extrusion drive unit 51 and the core device 13 can be miniaturized. As a result, for example, it becomes easy to mount the entire hydraulic pressure device 67 on the moving die plate 17.

The regulating portion 61 is arranged at a position where the moving die plate 17 moves in the mold opening direction and the movable member 49 comes into contact with the movable member 49 from the mold opening direction to the mold closing direction when the movable member 49 reaches the predetermined position. It may have the abutting member 23a.

In this case, for example, it is possible to easily and surely restrict the movement of the movable member 49 from the predetermined position in the mold opening direction. As a result, the movable member 49 is moved relative to the moving die plate 17 in the mold closing direction by moving the moving die plate 17 in the mold opening direction, and the operation of driving the extrusion pin 41 is easily and reliably performed.

The molding machine (die casting machine 1) may further include a fixing member (link housing 23) whose movement in the mold opening / closing direction with respect to the fixed die plate 15 is restricted. The regulating unit 61 may have a coupling device 63 that connects the movable member 49 and the link housing 23 and releases the coupling.

In this case, for example, the movement of the movable member 49 in both the mold opening direction and the mold closing direction can be restricted. As a result, for example, by moving the moving die plate 17 in both the mold opening / closing directions, the extrusion pin 41 can be moved in both the mold opening / closing directions with respect to the moving mold 105. The head side chamber 55h can be opened to the atmosphere by moving the piston 57 of the extrusion drive unit 51 toward the rod side chamber 55r by the mold clamping drive unit 21.

The molding machine (die casting machine 1) may have a control device 5 for controlling an extrusion drive unit 51 and a mold opening / closing drive unit (mold clamping drive unit 21). The control device 5 moves the movable member 49 relative to the moving die plate 17 toward the fixed die plate 15 by the extrusion drive unit 51 when the molded product 111 is in contact with the moving die 105 (FIG. 9 (FIG. 9). a)) After that, the movable die plate 17 is moved in the mold opening direction by the mold clamping drive unit 21 in a state where the movement of the movable member 49 in the mold opening direction is restricted by the regulating unit 61, and the movable member 49 is moved. It may be configured to control the relative movement of the die plate 17 toward the fixed die plate 15 (FIG. 9 (b)).

In this case, for example, the extrusion drive unit 51 is used to generate at least a driving force for mold release, and the mold clamping drive unit 21 is used at least for subsequent extrusion of the molded product 111. Therefore, extrusion can be suitably performed by forming both of them in a configuration suitable for the division of roles. For example, as described above, the extrusion drive unit 51 is a hydraulic type and the mold clamping drive unit 21 is an electric type, so that the driving force for mold release is reduced while reducing energy consumption and hydraulic fluid. Can be secured.

<Second Embodiment>
FIG. 11 is a diagram showing the configuration of the die casting machine 201 according to the second embodiment, and corresponds to FIG. 2 of the first embodiment.

Hereinafter, the configuration of the die casting machine 201 according to the second embodiment will be described. In the following description, basically, only the differences from the first embodiment will be described. Matters not particularly mentioned may be the same as those in the first embodiment or may be inferred from the first embodiment. Further, for the constituent elements of the first embodiment and the corresponding constituent elements, the same reference numerals may be used for convenience even if there are differences between the two.

The die casting machine 201 differs from the die casting machine 1 of the first embodiment only in the configuration of the extrusion drive unit. Specifically, in the extrusion drive unit 251 of the die casting machine 201, the piston 257 and the piston rod 259 are fixed.

12 (a) to 14 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). There is basically no difference between the first embodiment and the second embodiment with respect to the operations shown in these figures. However, when the extrusion drive unit 251 moves in the mold opening direction with the movement of the moving die plate 17 in the mold opening direction, the piston 257 opens the mold from the piston rod 259 in addition to or in place of the movable member 49. Receive force in the direction.

FIG. 13 (a) corresponds to FIG. 9 (a). Regarding the operation shown in this figure, there is basically no difference between the first embodiment and the second embodiment. However, when the piston 257 moves relative to the cylinder member 55 toward the head side chamber 55h, 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). In the operation shown in this figure, as in the first embodiment, the moving die plate 17 is driven in the mold opening direction by the mold clamping drive unit 21 in a state where the movement of the movable member 49 in the mold opening direction is restricted. .. However, unlike the first embodiment, since 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. At this time, the hydraulic fluid may be appropriately replenished to the rod side chamber 55r. For example, 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. Further, the hydraulic fluid may be supplied from the hydraulic pressure source 83 to the rod side chamber 55r. When the hydraulic pressure source 83 is the pump 89, 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 extrusion drive unit 251 may or may not assist the extrusion by the mold clamping drive unit 21.

FIG. 14 corresponds to FIG. Regarding the operation shown in this figure, there is basically no difference between the first embodiment and the second embodiment. However, when 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.

Also in the above die casting machine 201, the extrusion pin 41 can be driven by the extrusion drive unit 251 and the mold clamping drive unit 21. Therefore, the same effect as that of the first embodiment is obtained.

In the above first and second embodiments, the die casting machines 1 and 201 are examples of molding machines, respectively. The mold clamping drive unit 21 is an example of a mold opening / closing drive unit. The mold clamping motor 27 is an example of a mold opening / closing motor. The extrusion drive units 51 and 251 are examples of extrusion cylinders, respectively. 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 link housing 23 is an example of a fixing member. The hydraulic pressure drive unit 75 of the core device 13 is an example of a core cylinder.

The technique according to the present disclosure is not limited to the above embodiments, and may be implemented in various embodiments.

The molding machine is not limited to the die casting machine. For example, 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. .. Further, 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. In other words, the molding machine does not have to have a core device. In the embodiment in which the molding machine has 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 drive unit of the mold clamping device does not have to be a toggle type. For example, the mold clamping device may have a drive unit for opening and closing the mold and a drive unit for mold clamping separately. The mold clamping drive unit is not limited to the electric type, and may be a hydraulic type or a hybrid type that is a combination of the electric type and the hydraulic type. The extrusion drive unit is not limited to the hydraulic type, and may be an electric type or a hybrid type that is a combination of the electric type and the hydraulic type. The combination of the mold clamping drive unit method (electric and / or hydraulic pressure) and the extrusion drive unit method is also arbitrary.

The mold opening / closing motor, core motor and / or other motor (for example, the motor of the extruder) may be a linear motor instead of a rotary one. In this case, a transmission mechanism for transmitting rotation and a conversion mechanism for converting rotational motion into linear motion are unnecessary. Further, as described in the embodiment, the rotary motor may be directly connected to the conversion mechanism without using the transmission mechanism.

1 ... Die casting machine (molding machine), 5 ... Control device, 7 ... Mold clamping device, 9 ... Injection device, 11 ... Extrusion device, 13 ... Core device, 15 ... Fixed die plate, 17 ... Moving die plate, 21 ... Mold clamping drive unit (mold opening / closing drive unit), 41 ... Extrusion pin, 49 ... Movable member, 51 ... Extrusion drive unit, 61 ... Regulation unit, 101 ... Mold, 103 ... Fixed mold, 105 ... Mobile type, 107 ... Cavity , 109 ... Core.

Claims (12)

A fixed die plate that holds the fixed mold,
A moving die plate that holds the moving mold and can be moved in the opening and closing direction of the mold,
A mold opening / closing drive unit that drives the moving die plate in the mold opening / closing direction,
A movable member connected to an extrusion pin inserted in the mold opening / closing direction with respect to the moving mold and capable of relative movement in the mold opening / closing direction with respect to the moving die plate.
An extrusion drive unit that is supported by the moving die plate and drives the movable member in the mold closing direction with respect to the moving die plate.
The movement of the movable member that has reached a predetermined position in the mold opening direction with the movement of the moving die plate in the mold opening direction is restricted, whereby the moving die plate can be further moved in the mold opening direction. Along with this, a regulating unit that moves the movable member relative to the moving mold in the mold closing direction,
Has a molding machine. The mold opening / closing drive unit
Mold open / close drive source and
Link housing and
The molding machine according to claim 1, further comprising a link housing connected to the moving die plate and a link mechanism for transmitting the driving force of the mold opening / closing drive source to the moving die plate. The molding machine according to claim 2, wherein the mold opening / closing drive source has a mold opening / closing electric motor that generates a driving force transmitted to the moving die plate. The molding machine according to any one of claims 1 to 3, wherein the extrusion drive unit has a hydraulic type extrusion cylinder that generates a driving force transmitted to the movable member. The restricting portion restricts the movement of the movable member located at the predetermined position in the mold closing direction, whereby the movement of the moving die plate after the further movement in the mold opening direction is performed. As the die plate moves in the mold closing direction, the movable member is moved relative to the moving mold in the mold opening direction.
The extrusion cylinder is
A cylinder member fixed to one of the movable member and the moving die plate, and
A piston that divides the inside of the cylinder member into a first cylinder chamber and a second cylinder chamber, and
It has a piston rod that extends from the inside of the cylinder member to the outside of the cylinder member and is fixed to the movable member and the other member of the moving die plate.
At least the relative movement of the piston from the side of the first cylinder chamber to the side of the second cylinder chamber with respect to the piston rod is restricted.
The first cylinder chamber is a cylinder chamber to which a hydraulic fluid is supplied when the movable member is driven with respect to the moving die plate in the mold closing direction.
The molding machine according to claim 4, wherein the second cylinder chamber is open to the atmosphere. The restricting portion restricts the movement of the movable member located at the predetermined position in the mold closing direction, whereby the movement of the moving die plate after the further movement in the mold opening direction is performed. As the die plate moves in the mold closing direction, the movable member is moved relative to the moving mold in the mold opening direction.
The extrusion cylinder is
A cylinder member fixed to one of the movable member and the moving die plate, and
A piston that divides the inside of the cylinder member into a first cylinder chamber and a second cylinder chamber, and
It has a piston rod that extends from the inside of the cylinder member to the outside of the cylinder member and is fixed to the movable member and the other member of the moving die plate.
The first cylinder chamber is a cylinder chamber to which a hydraulic fluid is supplied when the movable member is driven with respect to the moving die plate in the mold closing direction.
The piston rod is
A rod body that is slidably inserted into the piston in the axial direction of the piston and
It has an engaging portion that is located in the second cylinder chamber, is fixed to the rod body, and can engage with the piston from the side of the second cylinder chamber to the side of the first cylinder chamber. The molding machine according to claim 4. It further has a hydraulic pressure source that supplies the hydraulic fluid to the extrusion cylinder.
The molding machine according to any one of claims 4 to 6, wherein the hydraulic pressure source is supported by the moving die plate. It is supported by the moving die plate and further has a core device for inserting and removing the core between the fixed mold and the mobile mold.
The core device has a hydraulic core cylinder that generates a driving force transmitted to the core.
The molding machine according to claim 7, wherein the hydraulic pressure source also supplies a hydraulic fluid to the core cylinder. A hydraulic pressure source that supplies the hydraulic fluid to the extrusion cylinder,
It is supported by the moving die plate and further has a core device for inserting and removing a core between the fixed mold and the mobile mold.
The core device is
A hydraulic core cylinder that produces a driving force transmitted to the core, and
It has a core motor that produces a driving force transmitted to the core, and has.
The molding machine according to any one of claims 4 to 6, wherein the hydraulic pressure source also supplies a hydraulic fluid to the core cylinder. The restricting portion is arranged at a position where the moving die plate abuts on the movable member from the mold opening direction to the mold closing direction when the movable die plate moves in the mold opening direction and the movable member reaches the predetermined position. The molding machine according to any one of claims 1 to 9, which has a contact member. It further has a fixing member whose movement in the mold opening / closing direction with respect to the fixed die plate is restricted.
The molding machine according to any one of claims 1 to 10, wherein the regulating unit has a coupling device for connecting and disconnecting the movable member and the fixing member. It has a control device that controls the extrusion drive unit and the mold opening / closing drive unit.
The control device moves the movable member relative to the moving die plate toward the fixed die plate by the extrusion drive unit when the molded product is in contact with the moving mold, and then the regulation. The movable die plate is moved in the mold opening direction by the mold opening / closing driving unit in a state where the movement of the movable member in the mold opening direction is restricted by the portion, and the movable member is fixed to the moving die plate. The molding machine according to any one of claims 1 to 11, which is configured to control relative movement to the side of the die plate.

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